10 results about "Precast concrete" patented technology

The invention discloses a steel-concrete slab-column structure system which comprises a concrete layer and a node framework structure of steel girders and steel columns and used for supporting the concrete layer, wherein the framework structure comprises a plurality of steel columns, steel girders connected between every two steel columns and connection assemblies used for connecting the steel columns and the steel girders. The steel beams comprise top flange plates, bottom flange plates and webs arranged between the top flange plates and the bottom flange plates and used for supporting the top flange plates and the bottom flange plates. The concrete layer comprises a prefabricated concrete layer arranged on the lower flange plates and a cast-in-place concrete layer arranged on the prefabricated concrete layer, and the cast-in-place concrete layer is formed by pouring concrete and a two-way reinforcement fabric. The steel-concrete slab-column structure system is convenient to operate on site, large in rigidity, strong overall and good in the anti-seismic property.

The invention discloses a fully-assembled prefabricated concrete girder bridge superstructure and further provides a construction method of the fully-assembled prefabricated concrete girder bridge superstructure. The fully-assembled prefabricated concrete girder bridge superstructure comprises prefabricated concrete box girder single bodies, prefabricated concrete guardrails and a bridge deck paving layer. The prefabricated concrete box girder single bodies comprise prefabricated concrete box girder bodies; flange plates are arranged on the two sides of top plates of the prefabricated concretebox girder bodies; transverse splicing rigid prefabricated pieces are pre-embedded in the flange plates; the prefabricated concrete box girder single bodies further comprise transverse partition plates, and transverse partition plate splicing rigid prefabricated pieces are pre-embedded in the transverse partition plates; longitudinal splicing rigid prefabricated pieces are pre-embedded in the twoends of the prefabricated concrete box girder bodies; the adjacent prefabricated concrete box girder single bodies are transversely and longitudinally spliced; and the prefabricated concrete guardrails are connected with the prefabricated concrete box girder single bodies, and guardrail locking nuts are assembled on guardrail connecting bolts. Through the structure, cast-in-place concrete and negative moment prestressed ribs of the prefabricated concrete girder bridge superstructure in the connecting construction process can be omitted, and all components of the superstructure are fully assembled.

An anti-collision municipal engineering power distribution cabinet disclosed by the present invention comprises a prefabricated concrete frame placed in a foundation pit, a prefabricated concrete base plate encloses the outer side surface of the top end of the prefabricated concrete frame, the outer end of the prefabricated concrete base plate is provided with a vehicle detector, and a stainless steel cabinet body is located in the prefabricated concrete frame. A micro servo motor is fixed in the prefabricated concrete base plate, the stainless steel cabinet door is installed at the top end of the stainless steel cabinet body through a hinge, the lower surface of an electric telescopic rod is fixed in the prefabricated concrete frame, and a micro refrigerating machine is located on the rear side of a circulating water pump. According to the anti-collision power distribution cabinet for municipal engineering, the stainless steel cabinet body is prevented from being collided by a vehicle, efficient heat dissipation is achieved, energy is saved, the influence on the stainless steel cabinet body caused by uneven settlement of a foundation is avoided, and dust in a municipal construction site is prevented from influencing electrical elements in the stainless steel cabinet body.

The invention provides a pre-embedded-free multi-functional lifting appliance for a precast concrete beam, and relates to a precast concrete beam. The pre-embedded-free multi-functional lifting appliance for the precast concrete beam comprises a detachable lifting appliance assembly, wherein a lifting ring is arranged on the detachable lifting appliance assembly; the detachable lifting appliance assembly comprises a balance rod and a stirrup clamping piece fixedly arranged on the balance rod in a sleeving mode; and a lap joint part matched with a stirrup on the precast concrete beam is arranged on the stirrup clamping piece. According to the pre-embedded-free multi-functional lifting appliance for the precast concrete beam provided by the invention, the multi-functional lifting appliance is used for replacing an embedded lifting appliance for the precast reinforced concrete beam, so that under the condition that the structural performance of a precast beam unit is not affected, a lifting jig which can be repeatedly used and adjusted and is suitable for various types of precast beams is used for grabbing the stirrup of the precast beam to lift, the manufacturing and construction procedures of the precast reinforced concrete beam are reduced, and the production and manufacturing cost of the precast reinforced concrete beam is reduced.

The invention relates to the technical field of precast concrete slab production, and provides a maintenance house maintenance state control system of a precast concrete slab production line. the system comprises a main controller PLC, a man-machine interaction display unit and pallet truck; the main controller PLC comprises a fault processing module, a pallet truck control module and a maintenance house state control module; and the pallet truck control module is connected with the pallet truck, and the main controller PLC is connected with the man-machine interaction display unit. A method using the control system is further provided. The system and method are advantageous in that multi-mode control is adopted, a maintenance house maintenance state is clear and controllable, the product quality is ensured, the system and method have guidance and normativity for workers' operation, and the qualified rate of products and production efficiency of a concrete production line are improved.

A preparation method of a prefabricated concrete member comprises the following steps that 1, steel bars are bound, and 35%-50% of the steel bars are replaced by porous steel pipes; the porous steel pipe is connected with the equal-diameter steel pipe and penetrates through the prefabricated concrete member; 2, concrete is poured into a test mold and vibrated evenly, the test mold is a porous test mold, holes in the porous test mold are the same as the porous steel pipe in aperture, and the porous steel pipe extends out of the test mold through the steel pipe; 3, performing high-temperature steam wet curing, removing the steel pipe, and removing the mold; 4, curing is conducted, specifically, a mixed solution is injected into the porous steel pipe to be soaked, the mixed solution comprises 80-90% of water, 1-5% of nanometer silicon oxide sol, 1-5% of sodium dodecyl benzene sulfonate, 1-5% of urea, 1-5% of sodium silicate and 1-5% of sodium carbonate, and the soaking time is 0.5-1 d; after soaking is finished, high-water-cement-ratio cement paste is injected into the porous steel pipe for water-saturated curing, and the curing time is 0.5-3 d; and 5, grouting materials are poured into the porous steel pipe. The problems that traditional steam-cured concrete is low in later strength and poor in durability are effectively solved.