45results about "Bridge erection/assembly" patented technology

Stay-in-place fascia forms and methods and equipment for installing thereof. A concrete form includes a vertical component and a horizontal component, the vertical component located substantially perpendicular to the horizontal component. Also, the form includes an interior surface, at least a portion of the interior surface providing a form for supporting uncured concrete; wherein the uncured concrete forms a concrete structural portion upon curing of the uncured concrete; and wherein the interior surface remains attached to the concrete structural portion after curing. The form may include inserts and compatible form attachments. Also, forms including recesses may be utilized to reduce the weight thereof. Lifting equipment and accessories may be utilized to lift the form from a form holder and set same in place. Forms contain the work area as soon as it is installed to minimize fall hazards and the time, costs, and downtime associated with installation of safety measures.

The invention relates to a reinforcing and repairing measure for existing concrete box girder bridges, and discloses a method for actively reinforcing a large-span concrete box girder bridge web plate, comprising the following steps: (1) according to the structural parameters of the concrete box girder bridge and by adopting a structural analysis method and corresponding general or special analysis software, a finite element model of a simulated reinforced plate shell concrete box girder bridge is established, thus obtaining the magnitude of the main pulling stress, the vertical stress, the longitudinal stress and the shearing stress of the box girder web plate before reinforcement and the distribution rule thereof; (2) the difference between the main pulling stress and the limited value allowed by the 'Standard' is compared to obtain the target increment value of the vertical stress of the bridge girder, and the actual reinforcement parameters are determined according to the target value; (3) drilling is carried out on the upper margin and the lower margin of the concrete box girder web plate, steel strands are installed and transversally stretched; (4) a wedge block A is used for jacking up the steel strands, then a jack is used for jacking up and pulling the steel strands to the allowed tensioning force, and the steel strands are tensioned one by one; and (5) crack is mended.

The invention relates to a system conversion method of first cable later beam construction of a self-anchored suspension bridge. The method includes: building the edge beams and bridge towers of the self-anchored suspension bridge, mounting temporary bridge tower anchoring devices, setting up a main cable to form the main beam sections of a main beam, and determining the position of a final closure; evenly arranging a plurality of bridge tower jacks in each temporary bridge tower anchoring device, and evenly arranged a plurality of closure jacks at the final closure starting the closure jacks and the bridge tower jacks, and controlling the actual total jacking force of the closure jacks and the bridge tower jacks to be equal to the horizontal pull force of the main cable to the edge beams; using a hierarchical symmetrical unloading manner to regulate the gap distance of the closure, and locking the closure jacks and the bridge tower jacks until the gap distance satisfies the welding requirement so as to complete the system conversion of the first cable later beam construction of the self-anchored suspension bridge. The method has the advantages that the temporary bridge tower anchoring devices can be demounted safely, stable conversion of the horizontal force from the temporary bridge tower anchoring devices to the closure gap regulating device can be achieved, and closure gap regulation can be performed smoothly.

The invention discloses a construction method of mutilevel overpass scaffold, comprising the following steps: building a bottom layer scaffold provided with steel frame doorways for vehicles and pedestrians to pass, checking and installing a deformation monitoring system, and carrying out a load pressure test on the bottom layer scaffold; building at least two layers of bridge scaffolds on the bottom layer scaffold, building box girder doorways for bridge construction on the bridge scaffold, installing the deformation monitoring system on the box girder doorway and carrying out comprehensive load test. The bottom layer scaffold is provided with the steel frame doorway so as to meet the passing demand of big traffic flow; each layer of the middle part can be provided with the mutually crossed box girder doorways in the same plane and can be provided with the mutually crossed box girder doorways in the vertical direction, therefore optionally carrying out construction according to requirements; the whole scaffold only needs to be built and removed once, not only shortening the building and removing time of the scaffold but also reducing the risk of building and removing the scaffold; and each level of bridge can be constructed at the same time, and therefore, the construction period is short and the construction cost is low.

The invention provides a steel girder sling arch bridge construction method applicable to large environmental restriction, comprising the following steps: assembling a sling arch bridge by dividing into multiple arch rid segments according to a construction sequence of firstly mounting a steel girder and then mounting the sling arch bridge, and hoisting each arch rid segments to places and assembling by utilizing an arch rib support frame by mounting the arch rid support frame on the assembled steel girder. Assembling of the steel girder in the construction site is realized by utilizing an assembling platform, so as to effectively solve the problem that the steel girder cannot be directly hoisted by large equipment due to limited construction environment; meanwhile, gantries of different heights are arranged according to the variable section properties and arc properties of the sling arch bridge, section steel box arch rid segments are transported to places by adopting an electric flatcar through gate type bracket, and then are hoisted to place by using winches at the tops of adjacent gantries and assembled.

The present invention relates to a method for reinforcing reinforced concrete structure by externally riveting steel plate and its special-purpose rivet. The reinforcing steel plate strip can be riveted on the surface of the concrete member from exterior of the concrete member, and the described rivet is made into the form of that the half of the rivet head of said rivet is semicylindrical form, and another half of semiconical form, and the cross-section of said rivet body is rectangular, and the transition portions between four planes of rivet head and rivet body are made into the oblique surface structure.

The invention discloses a construction method for integral hoisting of a large-span steel trussed beam. The construction method includes the following steps: (1), selecting a suspension center for integral hoisting of the large-span steel trussed beam, (2), designing and constructing a hoisting tool, and (3), constructing for integral hoisting. The construction method has the advantages that the steel trussed beam is erected through integral hoisting under a navigation condition, and the construction method is simpler in operation and easier in accuracy control as compared with a method in which the steel trussed beam is constructed through less-support segmentation assembly and floating support; safety risk of operations at sea is reduced, construction period is shortened, and construction cost is reduced.

The invention relates to a web-covering-base trapezoid (wave-shaped) steel plate combined box girder and a construction method thereof. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder comprises a box girder composite baseplate, a box girder composite structure top plate, trapezoid steel webs and a box girder partition plate. The box girder composite baseplate with a composite structure is formed by pouring epoxy asphalt concrete onto a trapezoid steel plate. The box girder composite structure top plate is a combined structure of a trapezoid steel plate beam and reinforced concrete. Before erection of the box girder, the trapezoid steel plate, the trapezoid steel plate beam and the trapezoid steel webs are welded or connected in other ways to form an integral structural system. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder and the construction method thereof have the advantages that longitudinal reinforcement binding and prestressing tendon pipeline laying of a prefabricated overall framework are completed, beam bodies or beam segment framework integral structures are hoisted and erected directly, and the reinforced concrete baseplate and the reinforced concrete top plate of the box girder are poured finally; baseplate concrete is flush with steel web flanges; the shape of a bridge is attractive, and construction is facilitated.

The invention belongs to the field of highway construction and discloses a capping beam post tensioning end sealing construction trolley. The capping beam post tensioning end sealing construction trolley comprises a truss body, running wheels, a lifting frame, an operation platform and a driving system; bottom beams are arranged at the bottom of the truss body; the running wheels are fixedly arranged at the bottoms of the bottom beams; the truss body comprises a truss bottom beam, a truss top beam, a chord member, a counterweight and jacks; the chord member is arranged between the truss bottombeam and the truss top beam; the operation platform comprises two capping beam underpinning beams, multiple bracket lining beams, a platform plate, an adjustable screw sleeve, a carrying pole beam and two capping beam lifting rods; the top of the lifting frame is hinged at one end of the truss top beam through a pin shaft; one ends of the two capping beam underpinning beams are correspondingly hinged with the bottom of the lifting frame; the other ends of the two capping beam underpinning beams are correspondingly hinged with the capping beam lifting rods; the capping beam lifting rods are hinged with the carrying pole beam on a capping beam; one end of the adjustable screw sleeve is hinged with the lifting frame; and the other end of the adjustable screw sleeve is hinged with the operation platform. According to the capping beam post tensioning end sealing construction trolley, the construction efficiency is enhanced, and the capping beam post tensioning end sealing construction trolley can be widely applied to the construction field.

The invention relates to a universal telescopic support frame suitable for a V-shaped pier. The universal telescopic support frame comprises a base mounted in cooperation with a crown beam. The base is connected with a spherical hinge seat which is matched with a spherical hinge. Reinforcing ribs are arranged around the spherical hinge seat. The spherical hinge is fixed to one end of a support column through a first connecting plate, the other end of the support column is detachably connected to a telescopic device through a second connecting plate, the support column is provided with a plurality of rings, and the end, away from the second connecting plate, of the telescopic device is detachably connected to a backing plate. According to the universal telescopic support frame, the crown beam of a foundation pit retaining pile serves as a stress bearing to bear the huge horizontal and vertical force of the V-shaped pier, the safety and structural stability of construction of the V-shaped pier are ensued, the universal telescopic support frame is applicable to different working conditions, and the repeat utilization rate is improved.

The invention discloses a reinforcing device for reinforcing a bridge pier through a cofferdam-free underwater enlarging section method. The device comprises template systems and limiting devices, wherein the template systems are matched with the bridge pier in shapes, the template systems are arranged outside the bridge pier in a sleeving mode, the plurality of template systems are sequentially overlapped from bottom to top so as to cover the whole bridge pier, the template system located at the bottommost part is fixed on a bridge table, the adjacent template systems are seamlessly connectedthrough bolts I, the limiting devices are arranged between every template system and the pier, the limiting devices are matched with the bridge pier in shapes, the inner sides of the limiting devicesare fixedly installed on the outer surface of the bridge pier, and the outer sides of the limiting devices are in contact with the template systems. According to the device, the template systems andthe limiting devices can be used for construction of the cofferdam-free underwater enlarging section method for reinforcing circular, rectangular or other shape bridge piers or columns, the construction speed is high, the cost is low, and the thickness of a reinforced layer concrete can be effectively ensured to coincide with the design.

The invention provides a bridge rainwater pipe construction vehicle which comprises a four-wheel drive trolley, a vehicle main frame is installed on the trolley, a rotating mechanism is installed above the center of the vehicle main frame, a gear is arranged below the rotating mechanism, the rotating mechanism is driven by a driving motor installed on the vehicle main frame to rotate, and the rotating mechanism can rotate by 360 degrees in the horizontal direction. An installation part is fixedly installed above the rotating mechanism, a telescopic arm penetrates through the installation part,a lifting box is arranged at one end of the telescopic arm, a lifting arm penetrates through the lifting box, a first construction basket is arranged at the lower end of the lifting arm, a rotating arm is arranged below the first construction basket, and a second construction basket is arranged below the rotating arm. According to the invention, constructors can conveniently conduct multi-personcooperative construction operation on the first construction basket body and the second construction basket body, the safety of the constructors can be effectively guaranteed, the operation efficiencycan be effectively improved, the operation coverage area is comprehensive, the construction basket can adapt to various operation environments, the construction difficulty is reduced to a great extent, and construction is more efficient.

The invention discloses a cast-in-place arch bridge combined support structure and a construction method thereof.The cast-in-place arch bridge combined support structure comprises a first-stage bearing platform, a pile foundation, a second-stage bearing platform, an arch device and a supporting device.The first-stage bearing platform comprises a concrete bottom pile, a supporting column, a reinforcing device and a fixing rod, a U-shaped groove is formed in the top of the concrete bottom pile, and a protruding block is inserted into the bottom of an inner cavity of the U-shaped groove; the supporting column is inserted into the top of the concrete bottom pile. The concrete bottom piles are poured at the bottom of the riverbed, the supporting columns are spliced to the concrete bottom piles, the fixing rods and the limiting rods are used for limiting the supporting columns, and the concrete bottom piles can provide a firm supporting point for the first-stage bearing platform and the second-stage bearing platform so as to facilitate pouring of the arch bridge; in addition, various devices can be conveniently disassembled after the arch bridge is poured, the concrete bottom piles under the water surface do not affect the flowing speed of passing ships and water flow, and therefore the construction safety is greatly improved.

The invention discloses a dual-drive device for automatic poling. The dual-drive device comprises a stand, a drive mechanism and a steel fixture, and is characterized by comprising an upper drive wheel and a lower drive wheel which are vertically opposite and axially located on the same perpendicular face, the middle of the upper drive wheel and the middle of the lower drive wheel are each provided with a concave arc, the two concave arcs which are vertically opposite are used for containing and clamping a rubber bar, the drive motor drives the upper drive wheel and the lower drive wheel to rotate in opposite directions at the same time, the drive mechanism comprises a drive shaft, labor intensity can be reduced, lateral slipping is avoided, and driving is powerful.

The invention relates to a composite pier anti-seismic reinforcement structure and a construction method thereof. The composite pier anti-seismic reinforcement structure comprises a cover beam and a bearing platform which are connected through pier columns, a plurality of vertical grooves are formed in the peripheries of the tops and bottoms of the pier columns, preformed holes matched with the vertical grooves are formed in the lower side surface of the cover beam and the upper side surface of the bearing platform, steel bars are arranged in the vertical grooves, and the steel bars extend into the preformed holes. Common concrete layers are arranged on the peripheries of the tops and bottoms of the pier columns, wherein the vertical grooves are coated with the common concrete layers, theouter sides of the common concrete layers are circumferentially coated with FRP cloth, pouring gaps are reserved between the FRP cloth and the common concrete layers, and the pouring gaps are filled with expansion concrete layers. The composite pier anti-seismic reinforcement structure and the construction method thereof have the advantages of simple structure, reasonable design and convenient construction, joint reinforcement is carried out by the implanted steel bars and FRP materials, the shear resistance bearing capacity, deformation performance, stiffness degradation, ductility, energy dissipation capacity and the like of a pier are improved to varying degrees, the anti-seismic vulnerability of the pier is reduced, a good fixing role can be achieved, and the structure can further be used for reinforcing the pier after an earthquake.

The disturbed reinforcement structure and construction method of existing bridges in deep valleys can effectively solve the problems of deformation and stability reinforcement of high-pier long-span bridges in steep slopes and valleys after disturbance, and has the characteristics of good economy, convenient construction, and environmental protection. The reinforcement structure includes: supporting pile foundations and supporting beams. The supporting pile foundations are arranged at intervals in the valley corresponding vertically to the foundation of the reinforced bridge abutment. The supporting beams are fixedly connected to the top of each supporting pile foundation, and their front ends are in close contact with the reinforced bridge abutment. , the rear end extends into the stable bedrock of the valley slope on the corresponding side of the reinforced bridge abutment; the reinforcement piles and soil retaining plates are arranged at intervals on the lower side of the valley in the influence range of the reinforced bridge abutment foundation, and the soil retaining plates are set at intervals Between the reinforcement piles and facing the upstream side of the valley; the waste muck body and the sealing layer, the waste muck body is filled in layers in the valley inside the reinforcement piles and the retaining plate, and the sealing layer is constructed on the top surface of the waste muck body.

The invention discloses a highway bridge widening reconstruction project line-crossing protection structure. The highway bridge widening reconstruction project line-crossing protection structure comprises a protection baffle, a water pipe clamping block, a reflective stripe and a pull block, a base is mounted below the protection baffle, a clamping plate is mounted on the outer side of a limitingplate, the water pipe clamping block is fixed to the top of the protection baffle, an empty groove located in the back face of the protection baffle is formed in the outer side of a partition board, aleaking groove located in the protection baffle is mounted below a fixed rod, a collection bin is mounted on the inner side of a placing groove, a connecting groove is formed in the outer side of a pull rope, an inserting rod is connected to the bottom end of the pull rope, and is located in a storage groove, and a spring is mounted on the inner side of the storage groove. According to the highway bridge widening reconstruction project line-crossing protection structure, dust falling work use is facilitated, dust can be collected, storage adjusting is facilitated, meanwhile, moving is conveniently carried out, combined use is facilitated, and road indication is carried out.

The invention provides a cable bent tower box type steel anchor beam and a construction method. The construction method comprises the main construction steps: (1) conducting construction preparation;(2) checking and accepting the pre-assembly precision of the steel anchor beam; (3) integrally pre-splicing the steel anchor beams; (4) transporting the steel anchor beams; (5) mounting a lifting appliance on the steel anchor beam; (6) mounting a first section of steel anchor beam; (7) heightening and mounting the steel anchor beam tower; and (8) controlling the mounting precision of the steel anchor beam and the steel corbel. The cable bent tower box type steel anchor beam and the construction method have the advantages of being high in construction efficiency and high in assembling precision, having good technical supportability and design and application of the assembling jig frame, greatly improving the assembling construction efficiency of a steel anchor beam and a steel corbel unit,being convenient and reliable in assembling precision regulation and control and remarkable in quality control effect, and bringing good construction and economic benefits to projects and enterprises.

The invention discloses a method for mounting a tower crane on the top surface of a shaped bridge. The method comprises the following steps of: (1) manufacturing a steel structure tower crane foundation, and welding a standard knot base to the tower crane foundation so as to manufacture a steel structure base; (2) drilling a plurality of holes in the top surface of an existing bridge or an existing structure object, or embedding anchor bolts in reinforced concrete, and anchoring the steel structure base on the top surface of the bridge or the top surface of a building through high-strength bolts; (3) mounting the tower crane on the steel structure base in the step (1); and (4) completing the mounting of the tower crane by a conventional method. According to the method disclosed by the invention, an existing structure object is used as a foundation, and the foundation of the tower crane does not need to be built additionally. When the bearing capacity of a ground base around the building is poor, and a water surface, a water edge or the like do not have conditions of building the foundation of the tower crane, the existing building is used for building the tower crane, so that the cost of the foundation of the tower crane can be saved. Steel members do not need to be embedded into concrete, and various materials can be repeatedly used, so that material wastage is reduced, and the cost is reduced.

The invention relates to the technical field of bridge construction, and provides an adjustable intelligent pouring distributing device for high piers and tower columns; the device comprises a supporting platform, a rotary stock bin and a telescopic sliding groove. The supporting platform is erected on a tower column formwork, and a telescopic lifting bearing structure is fixed to the supporting platform. The rotary stock bin is located at the top of the telescopic lifting bearing structure and rotationally connected with the telescopic lifting bearing structure. Meanwhile, a plurality of discharging ports are formed in the bottom of the rotary stock bin along the peripheral wall of the rotary stock bin, and each discharging port is connected with a set of telescopic sliding grooves; one end of the telescopic sliding groove is fixed to the rotary stock bin, and the other end of the telescopic sliding groove obliquely extends downwards relative to the bin body. The construction efficiency is high, the safety risk is low, materials can be evenly distributed on the periphery, and the device is suitable for pouring construction of tower columns with different sections.

The invention discloses a steel bridge deck pavement layer pit slot repairing method based on induction heating. The method comprises the steps of prefabricating an asphalt brick; carrying out regulation treatment on a pit slot area; brushing the periphery of the asphalt brick with asphalt, and spreading a powdered scrap-shaped sensing material; brushing a waterproof bonding layer on the surface of a steel deck steel plate; pressing the asphalt brick into the pit slot which is subjected to the regulation treatment; inductively heating the area; and after heating is completed, fully compactingthe repaired area and the peripheral corners of the repaired area. According to the method, the pit slot can be rapidly repaired with high quality.

The invention provides a wooden bridge and an installation process thereof, and belongs to the technical field of viaducts. The wooden bridge comprises: a plurality of bridge column bearing platforms; multiple bridge column assemblies which are arranged on the upper sides of the multiple bridge column bearing platforms correspondingly, wherein the multiple bridge column assemblies and the bridge column bearing platforms are in one-to-one symmetry; multiple sets of bridge column wrapping decoration assemblies which are arranged on the front sides and the rear sides of the multiple sets of bridge column assemblies correspondingly, wherein protection on the front sides and the rear sides of the bridge column assemblies is achieved; longitudinal beam assemblies which are arranged on the upper sides of the two longitudinal bridge column assemblies respectively; a plurality of groups of cross beam assemblies which are respectively arranged between the two groups of longitudinal beam assemblies; and multiple groups of bridge floor assemblies which are arranged on the upper sides of the multiple groups of cross beam assemblies. According to the device, the wooden bridge can be installed through the rubber hammers and the screws, so that the wooden bridge can be installed more simply and safely, and students can use the device to install the viaduct in a short time.

The invention discloses a movable trolley for bridge guardrail formwork assembly and disassembly and a construction method thereof. The movable trolley comprises a tire type walking chassis and a hanging basket which are arranged on the two sides of a guardrail formwork to be mounted and dismounted respectively, a cargo carrying platform is arranged on the tire type walking chassis, the cargo carrying platform is connected with a horizontally-arranged cantilever beam through a first support, the hanging basket is also connected to the cantilever beam through a second support, a crane is installed above the cantilever beam through a third support, the crane is located above the guardrail formwork to be mounted and dismounted, and the cargo carrying platform is used for containing the guardrail formwork needing to be mounted or dismounted. By means of the walking function of the tire type walking chassis, a formwork is conveyed to a construction position needed by a concrete wall body in a pipe ditch, then a chain block is used for assisting formwork installation personnel in adjusting the height of the formwork, and formwork installation and reinforcement work is completed. In a limited working plane, the formwork mounting position is accurate, the formwork mounting and dismounting time is shortened, the construction quality is improved, and the engineering cost is reduced.