33results about How to "Improve the quality of engineering construction" patented technology

The invention relates to a formwork system of a prefabricated comprehensive pipe gallery and a construction method thereof. The formwork system comprises a prefabricated pedestal, walking rails are arranged on two sides of the prefabricated pedestal in the longitudinal direction correspondingly, the walking rails are provided with outer mold hydraulic systems which are matched with the walking rails and are used for forming a comprehensive pipe gallery outer mold, a bottom plate is arranged on the upper side of the prefabricated pedestal, the bottom plate is provided with an inner mold hydraulic system capable of moving in the longitudinal direction and is used for forming a comprehensive pipe gallery inner mold, and the bottom plate is further provided with an end formwork of the comprehensive pipe gallery. The formwork system of the prefabricated comprehensive pipe gallery is beneficial to improving the engineering construction quality and improving the working efficiency.

The invention relates to a lifting and sliding mounting technology for platform large equipment. The lifting and sliding mounting technology comprises the following steps of 1, arranging a lifting transverse beam at one side of a large topside; fixing a sliding rail on the lifting transverse beam, and arranging the large equipment on the lifting transverse beam; arranging a lifting corbel; 3, arranging a lifting tower frame at one side of the lifting transverse beam, and arranging lifting jacks on the lifting tower frame and the lifting corbel; 4, arranging a tower frame oblique brace and a guy cable wind rope at one side of the lifting tower frame, and tightening; 5, lifting the lifting transverse beam to the setting height; 6, fixing the lifting corbel and the lifting transverse beam; 7, paving the sliding rail and a slide block on the large topside, arranging a sliding pull jack on the large topside, and sliding the large equipment to the proper position; 8, removing the slide block and the sliding rail, so as to complete the mounting operation. The lifting and sliding mounting technology has the advantages that the large equipment can be mounted on the platform topside without using large floating cranes and large crawler cranes, the operation cost is greatly reduced, and the quality of engineering construction is improved.

The invention provides a prefabricated valve set for a four-pipe fan coiler. The prefabricated valve set comprises a support, an electric two-way valve, a first ball valve, a second ball valve and a filter. The support comprises a steel channel, first supporting plates and second supporting plates. Multiple first supporting plates are fixedly connected to the outer side of the first side wall of the steel channel. Multiple second supporting plates are fixedly connected to the outer side of the second side wall of the steel channel. The first side wall and the second side wall are parallel. Thefirst end of the electric two-way valve is connected with the first end of the first ball valve through a first pipe section. The first end of the filter is connected with the first end of the secondball valve through a second pipe section. The first pipe section penetrates through holes in the first supporting plates, and the second pipe section penetrates through holes in the second supportingplates. According to the prefabricated valve set, the project construction quality is improved greatly, the prefabricated valve set has integrality and compactness, and is easy to install, and unnecessary potential safety hazards of high-altitude operation are avoided.

The invention relates to a method for controlling thickness and flatness of a concrete floor. The method comprises the following steps that a floor elevation reference control line and an auxiliary control line are marked on a white positioning plate, the white positioning plate is bound on a frame column or a shear wall reinforcing steel bar, and the floor elevation reference control line on thebound white positioning plate is consistent with a pre-marked positioning elevation corresponding to the vertical direction of the floor; a laser digital display horizontal ruler is fixed at the top of a horizontal darby slicker; when the concrete floor is subjected to last accurate flattening, the horizontal darby slicker is placed at the top of the concrete floor; and when laser light emitted bythe laser digital display horizontal ruler coincides with the elevation reference control line on the white positioning plate, the height of the bottom surface of the horizontal darby slicker is consistent with the design elevation of the upper surface of the concrete floor. The method can achieve the purposes of the economy, the convenience, the effective control of the thickness and the flatness of concrete, so that the thickness and the flatness of the poured concrete floor meet the quality standard requirements.

The invention belongs to the technical field of heat supply and insulation and relates to an insulation joint for a directly-buried high-temperature hot-water pipe network in heat-supply engineering, in particular to a waterproof type electric hot-melting insulation joint. The waterproof type electric hot-melting insulation joint mainly comprises a PE casing, steel tubes, a steel tube weld seam, an electric hot-melting sleeve, charging ports, primary heating cables, secondary heating cables, a seamless thermal shrinkable sleeve, plugs, polyurethane foaming plastic, a foaming cavity, plastic welding, clamping straps, PE lap seams and clampers. The two sealing sleeves, namely the electric hot-melting sleeve and the seamless thermal shrinkable sleeve are arranged at the outer side of a pipeline, so that the sealing and water resisting properties of the insulation joint are enhanced; and by using two times of heating and welding for the electric hot-melting sleeve, in particular the secondary transverse joint heating, the construction quality of projects is further improved, and great significance for improving the construction quality of an insulation pipeline is realized. The waterproof type electric hot-melting insulation joint has the advantages of simple principle, reasonable structure, low preparation cost, mature and safe mounting process, good application environment and wide application range.

The invention provides a large-scale multi-ribbed prefabricated aqueduct formwork anti-deformation support device and construction method. The portal frame is fixedly connected to the outer mold, the beam of the portal frame is fixedly connected to the inner mold through a plurality of inner mold pull rods, and the bottom of the outer mold is provided with a bottom Bracket; between the outer mold and the inner mold, there are multiple pre-embedded tie bar screws; the top of the inner mold is provided with an inwardly bent bending part; the bottom of the inner mold rod is provided with a hook, and the hook hooks the inner The horizontal fence on the inside of the mold is fixedly connected with the horizontal fence, the inner mold tie rod passes through the bending part of the inner mold, and the inner mold tie rod also passes through the crossbeam and pad and is fixedly connected with the nut. The construction method includes the following steps: processing the formwork support device in the factory; adjusting the position of the inner mold and the outer mold to the design size, installing the columns and beams; installing the tie rods of the inner mold, pouring the tank body, and realizing the large-span multi-ribbed prefabricated aqueduct through the above steps The pouring size is accurate and there is no deformation. It overcomes the deformation of the multi-rib prefabricated aqueduct in the pouring process in the prior art.

The present invention relates to a method for determining the weight of evaluation indicators for rural power grid transformation and upgrading projects. The method firstly uses the analytic hierarchy process to determine the subjective weight; The subjective and objective weights are multiplicatively integrated to establish the final index weight, which not only avoids the influence of subjective deviation but also fully reflects the objective actual situation, which can effectively improve the scientificity and accuracy of index weight assignment.

The invention discloses a turnover concrete silo structure steel bar accurate positioning device and method. Fixed channel steel is arranged on a slip form operation platform in a crossing mode, a plurality of detachable guide positioning steel plates are arranged on the fixed channel steel, fixing holes used for being connected with steel bars in a sleeved mode are formed in the guide positioning steel plates, and the perforating direction of the fixing holes is parallel to the lifting direction of the slip form operating platform; and a plurality of guide positioning steel plates are uniformly arranged on the fixed channel steel at intervals. Compared with a conventional construction method for positioning horizontal and vertical reinforcing steel bars during construction of a building structure main body, the construction method for accurately positioning the concrete silo structure reinforcing steel bars in a turnover manner is adopted in the sliding and lifting construction process of the silo wall of the concrete silo structure, installation is convenient, dismounting and changing are flexible, positioning is accurate, displacement is not prone to occurring, modular construction is achieved, labor is reduced, the construction cost is reduced, the engineering construction quality is improved, rework losses are reduced, and the management cost is reduced.

The invention provides a column formwork surrounding bracket supporting assembly which comprises a plurality of surrounding bracket vertical rods. The surrounding bracket vertical rods are located on the column angle bisectors of the column formwork. Column angle sealing hoop plates are arranged on the surrounding bracket vertical rods at intervals, and the angles of the column angle sealing hoop plates adapt to the column angles of a column formwork so that the column angle sealing hoop plates can cover the column angles of the column formwork. The adjacent column angle sealing hoop plates located at the same height can be connected through telescopic pulling connectors, or the telescopic pulling connectors are connected between the adjacent surrounding bracket vertical rods located at the same height, so that a surrounding bracket supporting body hooping the outer side of the column formwork is formed. Certainly, due to a beam formwork, no telescopic pulling connector is arranged between the adjacent column angle sealing hoop plates located on the upper portion of the surrounding bracket vertical rod, or no telescopic pulling connector is arranged between the upper portions of the adjacent surrounding bracket vertical rods. According to the column formwork surrounding bracket supporting assembly, the modularly-assembling tool type surrounding bracket supporting body is formed on the periphery of the column formwork through the surrounding bracket vertical rods, the column angle sealing hoop plates and the telescopic pulling connectors, the structure is stable, supporting is firm, and reusing is achieved.

The invention belongs to the field of underground engineering, and relates to a reverse construction method of an underground structure, comprising the following steps: 1) constructing an enclosure structure, excavating a foundation pit to the position of the structural roof, constructing the structural roof and fixing the roof thereon for suspension 2) Set up a vertical bearing system, and connect the roof suspension system with the vertical bearing system; 3) Continue to excavate to the position of the middle plate of the structure, construct the middle plate of the structure and fix the middle plate suspension system on it; 4) Connect the mid-slab suspension system to the roof suspension system; 5) Continue to excavate to the position of the structural bottom plate, construct the structural bottom plate, and then construct the structural side walls and structural columns under the structural mid-slab; 6) Remove the mid-slab suspension Hanging system, structural side walls and structural columns above the slab in the construction structure; 7) Remove the top slab suspension system. The invention not only solves the problem of high cost of the temporary vertical support frame in the traditional reverse method, but also does not affect the construction of structural components, and can greatly speed up the construction speed and improve the construction quality.

The present invention provides a preconfigured piezoelectric generating circuit panel and a preconfigured method. In the method, the transduction module is first assembled by the method of step 1, and then the preconfigured piezoelectric panel is realized by the method of step 2, step 3 or step 4. Preconfiguration of the power circuit panel; Step 1, assemble the transduction module according to the structure of the transduction module; Step 2, use the unit groove to position and pour the prefabricated concrete road slab; Step 3, use the positioning board to position and pour the prefabricated concrete Pavement slab: Step 4, use the positioning tripod to position and pour the prefabricated concrete pavement slab. The assembled and prefabricated piezoelectric generating circuit panel of the present invention improves the environmental applicability and mechanical vibration energy capture efficiency of the piezoelectric transducer device in actual road applications, and realizes the large-scale collection and storage of road piezoelectric energy; avoids The dust pollution and construction waste generated during the construction and cutting of the traditional power generation circuit surface have been eliminated, and the environmental protection construction of the power generation circuit surface has been realized.

The invention belongs to the technical field of tunnel construction, and particularly discloses an open-cut cast-in-place tunnel main body structure concrete anti-crack construction method. The method comprises a pouring length division step, an anti-crack concrete preparation and mold entering temperature control step and a construction process control step. The method aims at the main contradiction of shrinkage and cracking of open-cut cast-in-place tunnel main body structure concrete, an anti-cracking performance control index and an implementation scheme are provided from two aspects of controlling the temperature (adiabatic temperature rise of the anti-cracking concrete, mold entering temperature, maximum temperature rise, inner-surface temperature difference, center temperature drop rate and temperature difference of mold removal or external thermal insulation measure) of the anti-cracking concrete and shrinkage deformation (7d autogenous volume deformation and 28d deformation of the anti-cracking concrete), a customized complete technical scheme is formed for main structures of different parts, control indexes are clear, universality is high, construction is easy, penetrability shrinkage cracks can be effectively restrained, the leakage problem is solved, and the engineering construction quality is improved.

The invention belongs to the field of heat preservation and relates to an installation method of a heat-preservation joint of a directly embedded high-temperature-hot-water pipe network used for heat-supply engineering, in particular to an installation method of a waterproof-type electric-melting heat-preservation joint. The method comprises following technical steps of: cleaning a working environment, installing an electric-melting sleevelet, welding gaps, foaming polyfoam, plugging a feeding port and sealing a seamless heat shrink sleeve. The installation method of the waterproof-type electric-melting heat-preservation joint has following beneficial effects: by utilizing the electric-melting sleevelet and the seamless heat shrink sleeve outside a pipeline, sealing and water-proof performance of the heat-preservation joint can be improved; through two-time heating and welding of the electric-melting sleevelet, especially transverse seam heating, engineering construction quality can be further improved, which is of great importance to improving construction quality of heat-preservation pipelines; the method is reliable in principle, easy and convenient in operation, mature in installation technology and is safe; and the waterproof-type electric-melting heat-preservation joint used in simple in structure, low in manufacture cost, user-friendly in application environment and broad in application scope.

The invention belongs to the technical field of tunnel construction, and in particular discloses an anti-cracking construction method for concrete of the main structure of an open-cut and cast-in-place tunnel, which includes the steps of dividing the pouring length, the preparation of crack-resistant concrete, the temperature control step of mold entry, and the construction process control step . The present invention aims at the main contradiction of shrinkage and cracking of the concrete of the main structure of the open-cut and cast-in-place tunnel, from the control of the temperature of the anti-crack concrete (the adiabatic temperature rise of the anti-crack concrete, the mold entry temperature, the maximum temperature rise, the temperature difference between the inside and the outside, the center temperature drop rate, Formwork removal or removal of external insulation measures (temperature difference) and shrinkage deformation (7d self-generated volume deformation and 28d deformation of crack-resistant concrete), put forward the crack resistance control index and implementation plan, and formed a customized package for the main structure of different parts The technical scheme has clear control indicators, strong universality, and simple construction, which can effectively suppress penetrating shrinkage cracks, solve leakage problems, and improve project construction quality.

The invention belongs to the technical field of heat supply and insulation and relates to an insulation joint for a directly-buried high-temperature hot-water pipe network in heat-supply engineering, in particular to a waterproof type electric hot-melting insulation joint. The waterproof type electric hot-melting insulation joint mainly comprises a PE casing, steel tubes, a steel tube weld seam, an electric hot-melting sleeve, charging ports, primary heating cables, secondary heating cables, a seamless thermal shrinkable sleeve, plugs, polyurethane foaming plastic, a foaming cavity, plastic welding, clamping straps, PE lap seams and clampers. The two sealing sleeves, namely the electric hot-melting sleeve and the seamless thermal shrinkable sleeve are arranged at the outer side of a pipeline, so that the sealing and water resisting properties of the insulation joint are enhanced; and by using two times of heating and welding for the electric hot-melting sleeve, in particular the secondary transverse joint heating, the construction quality of projects is further improved, and great significance for improving the construction quality of an insulation pipeline is realized. The waterproof type electric hot-melting insulation joint has the advantages of simple principle, reasonable structure, low preparation cost, mature and safe mounting process, good application environment and wide application range.

The invention discloses a manufacturing method of a high-strength prestress casting steel wire mesh. The manufacturing method comprises steps as follows: (1), a plurality of steel wires are vertically, horizontally and bidirectionally intersected and arranged into grids and placed in a prearranged mold; (2), engineering plastic is melt into a liquid which is input into casting equipment; (3), the casting equipment is used for casting intersected points of the grids in the step (1) until all the intersected points finish cast molding, and the steel wire mesh is obtained; and (4), the steel wire mesh obtained through cast molding is naturally cooled and solidified, and a final product is obtained. According to the manufacturing method, the problem that high-strength steel wires cannot form the steel wire mesh and cannot be applied to civil engineering in the prior art is solved, and the steel wire mesh has high practical value and promotion value.

The invention discloses a construction method for vertically penetrating a lower hanging plate of an external facade. The construction method is characterized in that an expansion screw, a shaped flatsteel, a matched steel plate, a bolt, a nut, a main keel, a secondary keel, an external facade hanging plate and a wall body are used for matched construction; the shaped flat steel is a T-shaped structure and comprises a top surface steel plate and an elevation steel plate; a mounting hole is arranged on the top surface steel plate, and the the shaped flat steel is fixedly connected with the wall body through the expansion screw at the position of the mounting hole; the shaped flat steel is spliced up and down through the elevation steel plate and the matched steel plate, the elevation steelplate and the matched steel plate are provided with reserved holes, and the shaped flat steel and the matched steel plate are connected and fixed by bolts; one side of the matched steel plate is fixedly connected with the main keel, the main keel is a vertical keel, the secondary keel is a transverse keel, and the main keel and the secondary keel are staggered and fixedly arranged to form the external facade frame of a rectangular grid structure; and the external facade hanging plate is fixed to the external facade frame.

The invention discloses a web-reinforced aluminum alloy plate-type node structure, which comprises a component, a first fixing block, a first bar and a second bar. The component is integrally formed with a first fixing block, and the first The four sides of the fixed block are symmetrically provided with first slots, one of the symmetrical two sides of the first slot is inserted with a first rod, and the other symmetrical two sides are inserted with a second rod, and One end of one of the first rods is integrally formed with a first plug, and the end of the other first rod is integrally formed with a second plug. The present invention can realize the firmness of the connection between the rod structures, thereby improving the joint Structural quality, improve the quality of engineering construction, it is more convenient and safe for the construction of node structure, improve the construction efficiency of structural mechanism, and then improve the efficiency of construction work.