170 results about "Civil engineering" patented technology

A framework for centrally controlling a plurality of building automation systems. The architecture and method automates a plurality of existing and new building automation systems comprising access control, HVAC, fire safety etc. in such a way that the plurality of building automation systems can be monitored and controlled from a central dashboard. The central dashboard effectively monitors, takes right decisions and remotely controls the buildings across the globe from a centralized location.

An apparatus that provides a continuous one-piece drip edge for a roof that not only protects from water damage, but also protects the roofing material at the rake and eaves from peeling as well as offer protection from wind, snow and ice and any other weather conditions that commonly strip roofing material from a roof surface.

The invention discloses a large-section tunnel supporting system penetrating through a huge karst cave hall and a construction method thereof. The supporting system comprises a plurality of steps anda tunnel base which are sequentially excavated downwards along the top of a karst cave hall backfill body, primary supports are sequentially constructed on all the steps, and the primary supports of all the steps and the tunnel base are integrally closed to form a ring; a karst cave top reinforcing body is arranged on a rock mass at the top of the first step, multiple grouting pipes are pre-buriedin the rock wall at the top of the first step in the line direction, and expanded arch springing is arranged at the bottom of the primary support of the first step; forepoling, steel floral tubes andprimary supports are arranged in excavation side walls of other steps except the first step, the forepoling and the steel floral tubes are completely located in the backfill body, and the forepolingand the steel floral tubes are not connected with the corresponding primary supports; and the tunnel base is provided with grouting steel pipe piles and reserved grouting holes.

The invention discloses a fore support and an excavating method of an inclined tunnel. The excavating method includes: punching grouting holes in a tunnel face of a pilot tunnel of the inclined tunnel, which is to be excavated, according to a set grouting hole interval for the inclined tunnel to be excavated; forming the fore support of the tunnel face after grout liquid is injected into the grouting holes; excavating the pilot tunnel with set stride length from the tunnel face according to the height and the span of the pilot tunnel, which are designed, wherein the grouting hole interval is predetermined according to the height and the span of the pilot tunnel. The technical scheme includes that cohesion and internal friction angles of surrounding rock of the tunnel face of the inclined tunnel to be excavated, and the designed height and the designed span of the pilot tunnel of the inclined tunnel to be excavated can enable the stability coefficient of the tunnel face of the pilot tunnel to be excavated to exceed a stability threshold value, and accordingly stability of the tunnel face is guaranteed, and safety can be improved during the pilot tunnel excavating process.

The invention belongs to the technical field of concrete. The invention relates to recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials in parts by weight: 150-200 parts of a recycled concrete aggregate, 400-450 parts of cement, 700-800 parts of sand, 1000-1100 parts of stones, 120-150 parts of mineral powder, 50-100 parts of fly ash, 3-7parts of an expanding agent, 5-10 parts of a tackifier, 4-8 parts of a water reducing agent and 150-200 parts of water. Concrete waste is subjected to crushing, hydrochloric acid solution soaking, sodium silicate solution soaking and polyvinyl alcohol solution soaking to prepare the recycled concrete aggregate, and gaps of the concrete waste are filled, so that the mechanical property of the recycled concrete aggregate is improved. The recycled concrete prepared in the invention has excellent mechanical properties, and is suitable for constructional engineering with high requirements on concrete.

The invention relates to a bituminous pavement track field evaluation method which comprises the following steps: A, performing field track survey, namely (1) selecting a road section to be evaluated; (2) testing the track depth; and B, calculating and settling the measurement result: (1) drawing a cross-section profile and a top datum line of each lane on the section line according to a ratio of 1:1; (2) determining the track depths D1 and D2 on the drawings, and reading to 1mm, wherein the maximum value serves as the maximum track depth of the section; (3) working out the mean value of the maximum track depth of each measured section to serve as the mean track depth of the evaluated road section; (4) determining the track deformation area of each section by employing a grid method, and determining the track deformation area of the evaluated road section through a formula; and (5) calculating the track repair engineering quantity between certain adjacent sections through the formula Vi+1=(Ai+Ai+1)*Di+1/2, and calculating the repair engineering quantity of the whole road section. The field track diseases can be objectively evaluated and reliable basis is provided for determining the track maintenance and repair engineering quantity.

The invention relates to the technical field of concrete mixer transportation tank trucks, particularly an automatic addition proportioner in a concrete mixer transportation tank truck transportation process, which comprises an electric cabinet fixed on a tank truck chassis, a tank storage box, a weightometer, a transportation proportioner, a transportation pipe, a detection sensor and a jet pipe capable of extending to the inside of the mixer tank body, wherein the bottom of the tank storage box is provided with the weightometer. The proportioner is reasonable and compact in structure and convenient to use; the detection sensor detects parameters of concrete in the mixer tank body and transmits the parameters to the electric cabinet, and the electric cabinet automatically controls the transportation and proportioning so as to transport the material in the storage tank in the tank storage box into the mixer tank body through the transportation pipe and jet pipe, thereby regulating and improving the concrete quality control indexes in the mixer tank body, and solving the problem of hidden quality danger in construction engineering due to high tendency to size distribution deterioration of concrete and reduced quality control indexes under extreme temperature conditions.

The invention discloses a combined splicing tubular pipe. The combined splicing tubular pipe comprises at least two hollow pile bodies which are sequentially connected with each other, and is characterized by also comprising at least one steel tube body, the steel tube body is a hollow cylinder and sleeved on the outer circumference of the junction of two adjacent hollow pile bodies of the combined splicing tubular pile, the steel tube body is provided with a plurality of plug welding holes, and the steel tube body is connected with the hollow pile bodies through the plug welding holes in a welding manner. The inner side wall of the steel tube body is connected with the tail part of one pile body in a welding manner and then connected with the head of another pile body in a plug welding manner. The pile for the irrigation works is simple in pile splicing operation, high in carrying capacity and strong in bend resistance; the steel tube body is added on the junction of the two pile bodies, so that the carrying capacity of the pile for the irrigation works can be increased; the steel tube body is provided with the plug welding holes, and the steel tube body is connected with the pile bodies in the plug welding manner, so that convenience in welding is achieved, and time and labor are saved.

Disclosed herewith a modular integrated building and a construction method thereof. The building includes multiple prefabricated room units, each provided with reserved, exposed reinforcing bars at its top. A bottom of a load-bearing structure of the prefabricated room unit is embedded with grouting couple shafts. Reinforcing bars of the load-bearing structure and of the prefabricated room unit of a next floor are inserted in inner grouting chambers of the grouting couple shafts to connect two prefabricated room units of adjacent floors together. A cast-in-situ concrete interlayer is arranged for connecting adjacent prefabricated room units of a same floor together. The on-site workload is reduced significantly, the construction period is shortened greatly, and the construction is convenient and rapid.

The invention discloses rotating spray sand cleaning method, which is used for cleaning sand at the bottom of a well. The method comprises the following steps of: A, connecting a shaft sand cleaning pipe column, inserting into the well, and detecting the depth of a sand surface by using the shaft sand cleaning pipe column; B, lifting the shaft sand cleaning pipe column by 1-3 meters; C, connecting a pump to the top of the shaft sand cleaning pipe column and pumping liquid for impacting settled sand at the bottom of the well; D, making the impacted sand flow upwards in an oil thimble along with fluid, settle downwards and settle into a slotted casing; and E, putting the shaft sand cleaning pipe column down, continuously washing sand to a designed construction well depth position, and pulling the shaft sand cleaning pipe column out of the well to finish rotating spray sand cleaning operation. Due to the adoption of the method, settled sand, metal smashed blocks, stained metal blocks and corrosion inhibitor adhesives at the bottom of the well can be cleaned, a production layer is exposed, and high sand cleaning efficiency is achieved.

A protected membrane roof system for installation on a roof decking comprising an upper insulation board having an upwardly-facing upper board top surface and an opposite downwardly-facing upper board bottom surface and at least one through-hole communicating therebetween, a ballast material positioned over the upper insulation board, and at least one fastener assembly having a base seated substantially adjacent the upper board bottom surface, a rod extending substantially vertically from the base of sufficient size so as to extend through the through-hole of the upper insulation board and the ballast material, and a cap engaged with the rod above the ballast material, whereby the wind uplift resistance of the protected membrane roof system is improved and scour of the ballast material is reduced by effectively anchoring the ballast material to the upper insulation board beneath the ballast material.

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 provides a low-material-consumption and simple-structure erecting structure and erecting method for a top ring beam construction platform of a concrete silo and relates to the technicalfield of concrete silo construction. The erecting method for the top ring beam construction platform of the concrete silo comprises the following steps: pre-burying two layers of steel pipe layers separately consisting of a plurality of horizontally arranged steel pipes at the upper end of a silo wall, putting cantilever scaffold pipes into the steel pipes of the steel pipe layers, and separatelyerecting vertical rod scaffold pipes, cross rod scaffold pipes and diagonal scaffold pipes for support stress components at the cantilever sections, located at the two sides of the silo wall, of the cantilever scaffold pipes. The construction cost can be saved, and the construction cycle can be shortened.

The invention discloses an assembled prefabricated floor connecting system and a construction method of the assembled prefabricated floor connecting system. The construction method comprises the following steps of 1) binding floor reinforcing mesh sheets in a workshop, embedding a plurality of longitudinal stressed reinforcing bars on the reinforcing mesh sheets, and connecting longitudinal stressed reinforcing bars on the two reinforcing mesh sheets through a plurality of connecting reinforcing bars and sleeves; 2) pouring concrete of the reinforcing mesh sheets to form floors; 3) screwing out the sleeves to separate the interconnected floors, and transporting the floors to a construction site; 4) welding an anti-shear steel plate to a steel beam at a construction site; 5) enabling the connecting reinforcing bars to penetrate through the anti-shear steel plate, and connecting the two ends of the connecting reinforcing bars with the longitudinal stressed reinforcing bars on the two floors through the sleeves; 6) and pouring concrete at the joints of the floors and the steel beam. The floors are effectively connected at the joints, the stress performance of the connection positionsof the joints is guaranteed, meanwhile, the prefabricated floors are manufactured in batch in the workshop, the on-site hoisting and mechanical connection operations are convenient, the construction speed is high, and the production efficiency is improved.

The invention relates to a marking device and particularly relates to a marking device for construction of a construction site. A technical problem to be solved by the invention is to provide the marking device for construction of the construction site, which can automatically mark, and is good in marking effect and simple to operate. The line marking device for construction of the construction site comprises a supporting plate, wheels which are rotationally arranged on the periphery of the bottom of the supporting plate; a push handle which is arranged on one side of the top of the supporting plate; a material carrying frame which is arranged in the middle of the supporting plate; a discharging assembly which is arranged on the lower side of the material carrying frame; and a driving assembly which is arranged on one side of the bottom of the supporting plate. The marking device is advantaged in that lime powder is placed in the material carrying frame by people, then a push handle is pushed forwards, under transmission, a first clamping block and a material blocking plate can be driven to move backwards, and under the action of gravity, the lime powder can fall down to the ground, so people carry out ground marking work.

The invention relates to a deep foundation pit dewatering, purification and recharging all-in-one system and a control method, and belongs to the technical field of foundation pit engineering. The deep foundation pit dewatering, purification and recharging all-in-one system comprises a plurality of pressure relief wells located in a foundation pit, water pumps located in the pressure relief wells,a plurality of recharging wells located outside the foundation pit, an impounding reservoir, a purification tank and a recharging control system, wherein one end of a water inlet of the impounding reservoir is connected with a multi-way pipe I; a purification filter net is arranged in the purification tank; and the recharging control system comprises a multi-way pipe II and a water valve and a water meter which are arranged on the multi-way pipe II. The deep foundation pit dewatering, purification and recharging all-in-one system can realize all-in-one operation of pressure relief by the pressure relief wells in the foundation pit, initial settlement by the impounding reservoir, effective purification of water by the purification tank and control over water levels in the recharging wellsby the recharging control system, can effectively make use of water resources, and is simple in structure, convenient to operate and low in cost. Meanwhile, the invention further provides a control method of the deep foundation pit dewatering, purification and recharging all-in-one system.