2459results about "Forming/stuttering elements" patented technology

The invention discloses a template embedded type dam face permanent heat preservation protection module and a prefabrication and construction method. Comprising a heat preservation core layer, a facing anti-seepage protection layer is arranged on the side, close to a concrete pouring formwork, of the heat preservation core layer, an internal pressure-bearing protection layer is arranged on the side, close to dam surface layer crack limiting steel bars, of the heat preservation core layer, and a thermal broken bridge supporting keel is arranged in the heat preservation core layer; an anchoring device is arranged in the area between the internal pressure-bearing protection layer and the dam surface layer crack limiting steel bars. The modular prefabrication and construction method is adopted, the prefabrication and installation method of a single module is simple and efficient, details such as anchoring protection measures are fully considered, the engineering construction operability is high, convenience and high efficiency are achieved, and the construction time of the heat preservation layer is greatly saved.

The invention provides a fair-faced concrete forming quality control method, belongs to the technical field of fair-faced concrete, and realizes real-time monitoring of a template deformation state by establishing a component geometric dimension reference coordinate system and a template deformation monitoring network. A deep learning model based on a ResNet residual network architecture is adopted to predict dynamic lateral pressure distribution in a concrete pouring process, a deformation compensation algorithm is utilized to accurately calculate a deviation value between an actual size and a design size of a component, a concrete surface quality evaluation system is established to identify surface defects, and a defect distribution matrix is established; and a quality control feedback adjustment mechanism is executed to dynamically optimize and adjust process parameters of subsequent pouring operation, and the technical problem that the geometric dimension precision of a component is difficult to control due to the fact that the formwork deforms under the lateral pressure effect of concrete is solved.

The invention discloses a construction method for an internal bent frame type structure frame body of a wind tunnel flow channel diffusion section. The construction method comprises the steps that P1, structural design is conducted on an inner steel formwork unit and a profile steel structure supporting frame unit; p2, after being machined, the inner steel formwork unit and the profile steel structure supporting frame unit are inspected to be qualified and conveyed to a construction site; p3, on-site positioning and paying-off of all the section sections of the inner steel formwork units are conducted; and P4, positioning installation of the inner steel formwork unit and the profile steel structure supporting frame unit is conducted, before installation, a BIM engineer makes installation animation demonstration through an inner steel formwork BIM model, visual disclosure is conducted on field management personnel and workers, and the workers conduct installation of an inner formwork supporting system according to the sequence of animation demonstration. According to the method, the wind tunnel flow channel diffusion section is gradually changed from a polygonal shape to a square shape in the horizontal direction, the construction problem of an ultra-large wind tunnel circular-to-square diffusion section is effectively solved, an internal mold supporting system meeting the construction precision requirement can be built by applying the method, and smooth construction is guaranteed.

Various implementations described herein are directed to a formwork system. In one implementation, the formwork system includes aluminum extrusions and aluminum castings. The aluminum castings and the aluminum extrusions can be assembled by being pressed and riveted together.

The invention discloses a construction method and device for controlling the perpendicularity of a high pier, and belongs to the technical field of bridge engineering construction. Determining a plumb aligner control point; mounting a creeping formwork bracket; installing a laser target; correcting and installing an inclination measuring instrument; centering the point position of the laser plumb aligner; measuring a deviation value between the laser beam and the pier body; collecting data of an inclination measuring instrument; and pier body concrete is poured. According to the method, through triple measurement rechecking and chemical deviation calculation, the perpendicularity control precision and efficiency of high pier construction are remarkably improved, and the method is suitable for high pier construction in a complex environment.

The utility model relates to a turnover internal corner construction formwork which comprises an angle adjusting rod, rotary connecting plates and steel formworks, the length of the angle adjusting rod can be adjusted, the two ends of the angle adjusting rod are connected with the rotary connecting plates respectively, one side of each rotary connecting plate is provided with a set of steel formworks, and the rotary connecting plates are fixedly connected with the steel formworks. Each steel formwork comprises an L-shaped steel plate, a supporting plate and a fixing plate, the edge of one flange of each L-shaped steel plate in the two sets of steel formworks is hinged through a rotating shaft, the opening ends of the L-shaped steel plates of the two sets of steel formworks face the same side, and the supporting plates and the fixing plates are arranged on the edges of the two flanges of each L-shaped steel plate of each set of steel formworks; the supporting plate and the fixing plate are clamped on the two sides of a flange of the L-shaped steel plate respectively and exceed the edge of the flange of the L-shaped steel plate, and the supporting plate, the L-shaped steel plate and the fixing plate are fixedly connected to form a slot. The internal corner construction quality and the construction progress can be improved, and the internal corner can be repeatedly used.

The utility model discloses a template embedded type dam face permanent heat preservation protection module. Comprising a heat preservation core layer, a facing anti-seepage protection layer is arranged on the side, close to a concrete pouring formwork, of the heat preservation core layer, an internal pressure-bearing protection layer is arranged on the side, close to dam surface layer crack limiting steel bars, of the heat preservation core layer, and a thermal broken bridge supporting keel is arranged in the heat preservation core layer; an anchoring device is arranged in the area between the internal pressure-bearing protection layer and the dam surface layer crack limiting steel bars. The modular prefabrication and construction method is adopted, the prefabrication and installation method of a single module is simple and efficient, details such as anchoring protection measures are fully considered, the engineering construction operability is high, convenience and high efficiency are achieved, and the construction time of the heat preservation layer is greatly saved.

The invention discloses a concrete cantilever structure pull-up formwork construction method which is characterized by comprising the following steps: load calculation and component model selection; pre-burying the U-shaped bolts; pre-burying the upper-section pull rod; i-shaped steel end connecting plates are welded, and double-layer angle steel connecting plates are welded to the cantilever ends of the I-shaped steel; i-shaped steel cantilever girders are installed; assembling a pull rod system; the pull rods are fastened and leveled with a system, the two pull rods are synchronously fastened, the double rods are ensured to simultaneously advance and retreat during adjustment of an adjusting device, and a level gauge is used for observation and leveling after initial adjustment; the formwork frame and the safety enclosure are installed; pull rod pre-tensioning and deflection monitoring are carried out, pre-tension force is applied through an adjusting device, the deflection of the cantilever end is detected, monitoring points are arranged, and a deformation early warning mechanism is established; regulating and controlling concrete pouring; and removing the mold and recycling. The overhanging structure is high in anti-overturning capacity and suitable for large-span and special-shaped overhanging structures, and the safety is remarkably improved.

The utility model relates to the technical field of constructional engineering construction, in particular to a hydraulically-supported haunch angle steel die which comprises a fixed base, a supporting column is fixedly installed at the upper end of the fixed base, a limiting frame is installed at the upper end of the supporting column, and a pushing motor is installed at the lower end of a sliding lantern ring. An auxiliary connecting rod is slidably mounted at the lower end of the pushing motor, and an axillary angle steel die body is mounted at the lower end of the auxiliary connecting rod. According to the improved haunch angle steel die, a pushing motor pushes a pushing rod downwards so as to push an auxiliary connecting rod and an haunch angle steel die body to move downwards to extrude concrete, and then the haunch angle steel die body is driven to slide front and back in cooperation with an upper sliding lantern ring, a threaded rotating rod and a rotating motor, so that the concrete is plasticized; and when the device is used, plastic fixing can be rapidly conducted on concrete below, bolts are reduced, secondary machining is avoided, and the using efficiency of the device is improved.

The invention relates to the technical field of stair construction, and discloses a stair socket reinforcing formwork construction process which comprises the following steps of preparation before construction, completion of technical disclosure, assembly inspection and site arrangement. The installation of the modularized reinforcing assembly comprises the steps of arranging, fixing and calibrating an inclined strut assembly, a horizontal pull rod assembly and a quick connecting node; a formwork is installed and reinforced, the bottom formwork and the side formwork are connected through a horizontal pull rod, and the side formwork is supported through an inclined strut assembly; and the embedded reinforcing assembly is embedded, specifically, the embedded reinforcing assembly is arranged in the formwork and fixed to the formwork. By adopting the modular reinforcing assembly system and through standardized design and dynamic adjustment functions of the inclined strut assemblies, the horizontal pull rod assemblies and the rapid connecting joints, rapid arrangement, flexible adjustment and efficient installation in the construction process are achieved. Compared with a traditional formwork erecting process depending on manual measurement and field processing in the prior art.

The invention discloses a steel bar positioning device for an aluminum alloy formwork full cast-in-place outer wall, and relates to the technical field of steel bar positioning, the steel bar positioning device comprises a mounting mechanism, the mounting mechanism comprises a first mounting plate, one side of the first mounting plate is fixedly connected with a fixing plate, and the interior of the fixing plate is in threaded connection with a first screw rod; the lower end of the first screw rod is rotationally connected with a pressing block; and the stretching mechanism comprises a worm gear, one side of the worm gear is connected with a first bevel gear through a rotating shaft, and the surface of the first bevel gear is meshed with a second bevel gear. A unit type positioning mode is adopted, a front-back position adjusting mechanism is arranged in each unit positioning module, the mechanisms are matched with left-right position adjustment of the units, positioning angle multidimension and left-right front-back four-direction positioning are achieved, and compared with manual positioning, positioning is more accurate; different clamps can be replaced according to steel bars of different models, and adaptability is higher.

The invention relates to the technical field of aluminum formwork construction, aims to solve the problems that in traditional aluminum formwork construction, grout leaks at formwork abutted seams, bubbles are formed on the surface of concrete, and the concrete forming quality is influenced, and provides a construction method for improving the aluminum formwork concrete forming quality, and the construction method comprises the following steps that S1, an aluminum formwork is deeply designed; s2, factory prefabrication; S3, on-site assembly; S4, concrete pouring; S5, aluminum mold dismantling; the aluminum formwork is optimally designed, the exhaust holes are formed in the formwork, the waterproof breathable film is installed, water vapor on the surface of concrete can be effectively removed, bubbles are prevented from being formed on the surface of the concrete, and the forming quality of the surface of the concrete is improved; the structure of the aluminum mold joint is optimized, a positioning groove is designed at the splicing part of the template, and an elastic sealing embedded strip is designed in the positioning groove, so that the problem of slurry leakage of the aluminum mold joint is effectively avoided; and the attached vibrator is combined with a water-vapor separation structure, so that the overall vibrating effect of concrete in the aluminum mold is improved, and the concrete forming quality is improved.

The invention discloses a prefabricated conical shell steel supporting structure capable of being hoisted for squat silo construction. The prefabricated conical shell steel supporting structure comprises a conical shell wall plate assembly, a ring beam assembly, a radial beam, a lifting lug assembly, an adjustable supporting assembly, an anti-swing assembly, a connecting assembly, an auxiliary positioning assembly and a sling connecting assembly. Core components such as the conical shell wall plate and the supporting framework are all prefabricated in a factory, the quality is controllable, splicing and hoisting are only needed on site, high-altitude erecting operation is greatly reduced, the high formwork erecting risk and the hidden danger of falling objects from high altitudes are reduced, hoisting stability is high, safety is improved, hoisting stress is dispersed through the lifting lug stiffening plates, and the hoisting efficiency is improved. The anti-swing assembly and the cable wind rope cooperatively control swing, it is ensured that the overall hoisting process is stable, structural collision and stress overload are avoided, the splicing precision is high, the adaptability is high, adjustability during installation is achieved through the adjustable supporting assembly arranged on the squat silo top, and it is ensured that the hoisted steel supporting structure can accurately fall on the preset position of the squat silo top.

The invention discloses a construction method for supporting and reinforcing an ingestion slope formwork of a special-shaped concrete trough, and relates to the technical field of constructional engineering. The method comprises the following steps: 1, construction preparation; 2, surveying and setting out; 3, binding reinforcing steel bars of the feeding trough; step 4, pre-assembling and checking the template; fifthly, the wood formwork is installed; sixthly, a hanging ring expansion bolt is installed; seventhly, the formwork is supported and reinforced; 8, checking before concrete pouring; ninthly, concrete pouring is conducted; tenthly, the formwork is dismantled; eleventhly, lifting ring expansion screws are dismantled, and bolt holes are plugged; 12, concrete curing; according to the construction method, the feeding trough is divided into sections and constructed in a segmented mode, a DN15 PVC sleeve is pre-buried at the bottom of the trough face in advance, and concrete at the trough bottom is poured in advance, so that the pulling supporting force and stability of a trough wall formwork are enhanced, and the risks of formwork expansion, grout leakage, displacement, deformation and the like in the pouring process of the slope bottom formwork are effectively prevented.

The invention discloses a construction method of a concrete inner formwork supporting system for an ultra-large wind tunnel diffusion section. The construction method comprises the steps that S1, full-simulation modeling is conducted on a runner structure and a steel formwork according to a construction drawing by means of the BIM technology; s2, after processing by a factory, re-checking and splicing the steel templates by using BIM data, and pasting two-dimensional codes, and S3, carrying out on-site positioning and paying-off on each section of the inner steel template; s4, before the inner template supporting system is installed, the worker installs the inner template supporting system according to the sequence of animation demonstration of the BIM model; s4, before the inner template supporting system is installed, a BIM engineer makes and installs animation demonstration through the inner steel cylinder template BIM model, visual disclosure is conducted on field management personnel and workers, and the workers install the inner template supporting system according to the sequence of animation demonstration; effective combination of the bottom plate and the steel formwork can be effectively guaranteed, displacement of the steel formwork in the mounting process is prevented, defects existing in construction are reduced, and working efficiency is improved.

The invention discloses an adjustable back arris arc formwork structure which comprises a formwork assembly and a hoisting mechanism, the hoisting mechanism is connected with a winch on an operation beam of a tower building machine, the formwork assembly comprises a plurality of flexible plates and a plurality of supporting plates, positioning plates are fixed to the two ends of each supporting plate, and splicing assemblies are arranged on the positioning plates; a flexible plate is connected between every two adjacent supporting plates through an assembling assembly, the flexible plates are elastic, and the front end faces of the flexible plates and the front end faces of the supporting plates jointly form a continuous smooth working face. The rear end face of the supporting plate is connected with a reinforcing back ridge, the middle of the rear end face of the flexible plate is provided with a plurality of connecting blocks, and the reinforcing back ridge is provided with a plurality of adjustable back ridge assemblies. The curvature of the arc formwork can be accurately controlled in the construction process of the tower building machine, and a high-reliability solution is provided for curved surface concrete pouring.

The invention discloses a temperature-resistant, flame-retardant and anti-corrosion composite material for a building as well as a preparation method and application of the composite material, and belongs to the technical field of polycarbonate building materials. The composite material is prepared from the following components in parts by weight: 60 to 80 parts of polycarbonate, 8 to 10 parts of a dispersing agent, 10 to 20 parts of epoxidized silicone rubber, 1 to 5 parts of benzotriazole, 1 to 5 parts of a flame retardant, 3 to 5 parts of a compatible aid, 0.3 to 0.5 part of an antioxidant, 0.2 to 0.5 part of a light stabilizer, 0.15 to 0.3 part of an anti-dripping agent and 0.2 to 0.4 part of a catalyst. According to the composite material, polycarbonate is used as a base material, the flame retardance and the corrosion resistance of the composite material can be remarkably improved by adding the epoxidized silicone rubber and the benzotriazole, the temperature resistance of the material is not obviously reduced, and the service life of the material is prolonged.

The utility model relates to the technical field of aluminum alloy formworks, and discloses an adjustable novel aluminum alloy formwork structure which comprises a first formwork body, the interior of the first formwork body is movably connected with a second formwork body through a height adjusting mechanism, and mounting grooves are formed in the inner walls of the two sides of the first formwork body. A cover plate is fixedly connected to the interior of the mounting groove through a locking mechanism, the height adjusting mechanism comprises a motor mounted on one side of the bottom of an inner cavity of the first formwork body and a fixing seat mounted at the bottom of the second formwork body, and the output end of the motor is fixedly connected with a forward and reverse lead screw; and the height of the second formwork body can be adjusted through the height adjusting mechanism, so that concrete pouring cavities with different heights can be subjected to enclosure treatment according to actual needs, and the application range and practicability of the device are greatly improved.

The invention discloses an outer containment dome steel mold hoisting structure and method, and belongs to the technical field of civil construction. The hoisting structure comprises a plurality of lifting lugs, a lifting hook, a plurality of steel wire ropes, a plurality of guide assemblies, a plurality of annular limiting assemblies and a plurality of radial limiting parts; the plurality of lifting lugs are fixed on the outer side of the dome steel mould of the outer containment; the lifting hook is connected with the plurality of lifting lugs through a plurality of steel wire ropes to lift the dome steel mould of the outer containment; the guide assembly comprises a guide column and a plurality of pairs of guide limiting pieces; the guide column is vertically fixed at the top of the outer containment; the guide limiting pieces are fixed to the outer side of the outer containment dome steel mold, the multiple pairs of guide limiting pieces are vertically distributed, and each pair of guide limiting pieces is arranged on the two sides of the corresponding position of the guide column; the annular limiting assembly comprises a shell annular limiting piece and a steel mold annular limiting piece. The radial limiting piece is fixed to the top of the outer containment and located on the outer side of the in-place position of the dome steel mold of the outer containment. The method has the advantages of high efficiency, project progress optimization, stable and reliable working quality and the like.

The utility model relates to a subway station cast-in-place concrete side wall large steel formwork supporting system which comprises a bottom plate and a large steel formwork, the bottom plate is provided with a side wall base corresponding to the bottom of a side wall, and a side wall reinforcement cage is bound on the side wall base; the large steel die is arranged on the bearing beam and comprises a large steel die panel, a large steel die support and a cantilever operation platform, the large steel die panel abuts against the side face of the side wall base, the large steel die support is fixed to the back face of the large steel die panel, and the cantilever operation platform is arranged at the top of the large steel die support. The utility model has the beneficial effects that by arranging the bearing beam and the sliding beam structure, the high-precision adjustment of the large steel mould is realized by utilizing the longitudinal jack and the transverse jack, and the sliding resistance can be effectively reduced by fully paving the stainless steel composite plates on the top surface of the bearing beam; three hydraulic rod mounting structures are provided and can be used for solving the problems that a foundation pit inner support exists on a large steel mold, a reverse top plate exists on the large steel mold, and neither the foundation pit inner support nor the reverse top plate exists on the large steel mold.

The present invention discloses a construction method of an L-shaped rotatable assembled fixed-shaped structural column formwork, and relates to the field of engineering construction. The construction method of the L-shaped rotatable assembled fixed-shaped structural column formwork comprises the following steps: step one, wall laying-out and positioning; step two, structural column rebar planting and steel bar binding; step three, block laying; step four, structural column aluminum formwork installation; step five, concrete pouring; step six, structural column aluminum formwork removal; step seven, finished concrete maintenance. The construction method of the L-shaped rotatable assembled fixed-shaped structural column formwork, after the structural column is poured, can dismantle the positive angle aluminum formwork and the negative angle aluminum formwork, so that the L-shaped rotatable assembled fixed-shaped structural column formwork can be rotatably utilized multiple times, avoiding material waste during conventional wooden formwork construction, ensuring the overall performance of the formwork installation, and improving the visual effect of the finished product. It can both speed up the construction progress and ensure the quality of the project.

To provide a structural slit member capable of reducing the burden of construction management during concrete pouring and capable of preventing bending and displacement from occurring in a structural slit.SOLUTION: Provided is a structural slit member 2 for arranging a structural slit along a side edge of a wall skeleton 12 of a building 1. The structural slit member 2 includes: a band-shaped structural slit 3 arranged on the side edge of the wall skeleton; a truss portion 4 formed in an elongated shape by a base plate and truss reinforcement on an inner side of the wall skeleton along the structural slit; and a fastener 6 for connecting an intermediate support member 61 passed through a through hole of the structural slit. The fastener 6 is arranged on an extension line of a through hole 31 of the structural slit 3, a plurality of the fasteners 6 are attached at intervals in a longitudinal direction of the truss portion 4, and the fasteners 6 are attached across the intermediate support member 61 and an upper end reinforcement 421 of the truss reinforcement.SELECTED DRAWING: Figure 1

The invention discloses a construction method for a slope arc-shaped concrete structure formwork. The construction method comprises the following steps that S1, positioning and paying-off are conducted; s2, manufacturing a template, namely bending the template according to the design of the construction drawing; s3, secondary keels are manufactured, equidistant cutting lines are drawn on the battens, and the battens are incompletely cut according to the cutting lines; bending the batten into a corresponding radian, then manufacturing a plurality of wooden wedges according to the size and the number of the notches in the upper part of the batten at the moment, smearing adhesives on the two sides of the wooden wedges, then inserting the wooden wedges into the notches of the batten, and completing the manufacturing of the secondary keel after the wooden wedges are firmly adhered; s4, formwork erecting is conducted, specifically, formwork erecting is conducted according to a drawing, the main keels are vertically arranged, and the auxiliary keels are horizontally arranged; s5, concrete pouring; and S6, formwork removal and maintenance are conducted. Compared with the prior art, the problems that an arc-shaped concrete structure formwork is difficult to construct and the quality is not easy to control can be effectively solved, safety and reliability during formwork erecting are guaranteed, and the flatness and the impression effect of a wall surface after concrete pouring can also be guaranteed.

The present invention corresponds to a formwork mechanism for casting and molding concrete, comprising a coffer having a sheet and four plates around the sheet perimeter. Each plate has holes arranged on its front face. Also, the formwork mechanism includes a structural element, connected to one of the plates by fixing means. On the other hand, the structural element has lateral perforations that are aligned with the holes of one of the coffer plates. Fixing means pass through the holes and side holes. The structural element may be a beam, a three or four-beam T, and combinations thereof. On the other hand, using several coffers interconnected with structural elements, formworks are constructed for casting flat reticular slabs; and also for curved reticular slabs with greater slab thickness near the beams supporting the slabs in comparison to the span of the slabs.

The invention relates to the technical field of building formworks, in particular to a building aluminum alloy formwork with a water and gas discharging function and a construction method. Comprising a first template and a second template which are connected with each other, a water vapor discharging mechanism is arranged between the first template and the second template, the water vapor discharging mechanism comprises a primary filtering part, a fine filtering part and a pressure relief part, the primary filtering part and the pressure relief part are both arranged on the second template, the fine filtering part is embedded in the first template, and when the first template is connected with the second template, the fine filtering part is embedded in the first template. The fine filtering part is in contact with the primary filtering part, the pressure relief part is matched with the fine filtering part, the primary filtering part and the fine filtering part are used for filtering concrete impurities, and high-pressure steam in the fine filtering part is discharged emergently through the pressure relief part. Under the condition of ensuring that the concrete is not lost, gas and excessive water in the concrete are effectively discharged, the solidification time of a concrete structural part is shortened, the defects of holes, pitted surfaces and the like on the surface of the concrete after the concrete is solidified are avoided, the water in the concrete is discharged in time, and the construction quality is improved.

The steel formwork hydraulic jacking construction method of the heat absorption tower concrete structure comprises the following steps that the first section of tower wall of a heat absorption tower is constructed, a plurality of steel cylinders are inserted into the first section of tower wall of the heat absorption tower in the circumferential direction, and concrete is poured to embed the steel cylinders; scaffolds are erected inside and outside the heat absorption tower respectively; a center drum is assembled in a heat absorption tower, a plurality of steel channels are installed on the top of the first section of tower wall of the heat absorption tower, the center drum is fixed through the steel channels, steel rings are jointly installed at the bottoms of all the steel channels, one jack is fixed to the top of each steel channel, and each jack is correspondingly fixed to one steel cylinder; a stay cable is installed between the channel steel and the central drum, and a hanging bracket is installed on the channel steel; wood formworks are fully laid on the tops of the steel channels, and derrick masts are arranged on the wood formworks; a hydraulic system is installed on the wood formwork; jacking the first section of tower wall of the heat absorption tower, continuously connecting the steel cylinder to the top of the steel cylinder after jacking, and circulating the operation until all jacking work is completed; in the jacking process, the load is greatly reduced, and the construction period is shortened.

The utility model relates to a silo conical shell reinforced concrete construction supporting structure which comprises a silo wall and a silo tip conical shell, a plurality of vertical supports are evenly distributed on the inner wall of an upper hole of the silo tip conical shell, a plurality of stand columns are evenly distributed at the upper end of the silo wall, the vertical supports and the stand columns are connected in a one-to-one correspondence mode through pull rods, and a plurality of main supports are evenly distributed on the bottom face of the silo tip conical shell. The main supports are connected with the vertical supports, the main supports are connected with embedded parts in the silo wall, steel formworks are connected between the main supports on the circumference, and longitude secondary supports and latitude secondary supports are further arranged below the steel formworks. The supporting structure is simple in construction, supporting components of a full framing formwork system and a steel truss supporting system from the silo bottom to the silo top are not arranged, steel pipe stand columns in the middle of an umbrella-shaped structure and a plurality of horizontal supports arranged at intervals in the height direction are not arranged, and a large number of turnover materials can be saved.

To provide a repair method for a hollow concrete structure further easily and inexpensively.SOLUTION: A method for repairing a concrete structure in which a cylindrical form 10 is embedded in concrete comprises a first step of exposing the form 10 by removing the concrete around the form 10, a second step of inserting a longitudinal bag body 20 made of a flexible material into the form 10 through an opening part 13 of the form 10 in the cylindrical axial direction of the form 10, a third step of filling the inside of the bag body 20 with a fluid 23, and a fourth step of forming a new concrete layer 41 in the area where the concrete has been removed.SELECTED DRAWING: Figure 1

A concrete building formwork for civil engineering comprises a bottom base plate, a combined rectangular frame plate, pressure applying cover plate assemblies and a material pushing assembly and is characterized in that the detachable combined rectangular frame plate is installed on the upper side of the bottom base plate in a clamped mode, and the pressure applying cover plate assemblies are installed on the upper side of the bottom base plate side by side; the combined rectangular frame plate comprises two groove-shaped plates arranged on the periphery and a plurality of clamping straight plates arranged in the middle, the pressing cover plate assembly comprises a groove-shaped portal frame, a pressing push rod, a centralizer and a cover plate, and the material pushing assembly comprises a beam plate, a sliding rail, a sliding block and a groove-shaped material pushing plate. The two beam plates are fixed to the lower sides of webs of the groove-shaped portal frames side by side. The concrete building template for the civil engineering and the using method thereof have the advantages that pressure and temperature parameters can be monitored in a partitioned mode, the pressure and the temperature can be regulated and controlled in real time according to the characteristics of the concrete solidification process, and rapid demolding can be achieved after a concrete floor slab is formed.

The invention discloses a heat preservation plate and steel frame combined type outer wall formwork, and relates to the technical field of building formworks, the outer wall formwork is composed of a steel frame and a heat preservation plate, a longitudinal connecting assembly is installed on the steel frame, a transverse anti-instability unit is arranged in the longitudinal connecting assembly, and the heat preservation plate is matched and fixed with the longitudinal connecting assembly through a positioning connecting rod. Under the action of self weight, the insulation board can be automatically locked and effectively connected with a wall body. The longitudinal connecting assembly is provided with a through hole, the diameter of the through hole is larger than that of the positioning connecting rod, and therefore automatic positioning and fixing of the insulation board are achieved. The design of an anti-instability unit, a guide sliding groove, a spring assembly and the like ensures that the insulation board is stable and does not fall off. The protection shell is matched with the connecting support, so that the heat preservation plate is safer in the installation process, automatic separation is achieved after concrete pouring, and the disassembly process is simplified. The device has the advantages of being simple in structure, convenient to install, stable and reliable, the construction efficiency can be remarkably improved, and manual operation is reduced.