Integrated forming and prefabricating method of L-shaped bank protection structure

Abstract

The invention relates to the technical field of bank protection structures, and discloses an integrated forming prefabrication method of an L-shaped bank protection structure and the L-shaped bank protection structure, the L-shaped bank protection structure comprises a wall body, a bottom plate and a short beam, the bottom plate is arranged at the lower end of the inner side of the wall body, the wall body and the bottom plate are connected through the short beam, concave-convex grooves used for mutual matching butt joint are formed in the two ends of the wall body and the two ends of the bottom plate, assembly is convenient, and time and labor are saved. According to the integrated forming and prefabricating method of the L-shaped bank protection structure, the formwork is convenient to construct and high in stability, the L-shaped bank protection structure can be produced in batches, construction errors are reduced, and the construction quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of revetment structures, and specifically to an integrated molding prefabrication method for an L-shaped revetment structure. Background Art

[0003] In the water transportation field, due to the long waterway lines, most of which are in the suburbs, there are certain difficulties in transporting and installing components. The application of prefabricated structures is less, and cast-in-place revetments are mostly used, which cannot achieve mass production and installation, are easily affected by natural environments such as bad weather, the construction period is uncontrollable, and manual masonry operations are prone to construction errors, reducing the construction quality.

[0004] For existing prefabricated structures, one is to adopt an integral box-type prefabricated revetment structure, mainly using precast boxes instead of breast walls, but the prefabricated assembly rate is not high; the other is that the secondary retaining wall adopts a prefabricated flood control wall structure. Since both the pile foundation and the prefabricated revetment floor slab are precast, the post-cast connection operation between the two is inconvenient and time-consuming. Therefore, an integrated molding prefabrication method for an L-shaped revetment structure is needed to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an integrated molding prefabrication method for an L-shaped revetment structure, which solves the problems mentioned in the above background.

[0006] The present invention provides the following technical solution: An integrated molding prefabrication method for an L-shaped revetment structure. The L-shaped revetment structure includes a wall body, a floor slab and a short beam. The floor slab is arranged at the lower end inside the wall body. The wall body and the floor slab are connected by a short beam. Concave and convex grooves for mating and docking are provided at both ends of the wall body and the floor slab.

[0007] A plurality of pile holes are provided on the side of the floor slab away from the short beam. Hoisting rings are arranged on the upper surfaces of the wall body and the floor slab.

[0008] The construction method includes:

[0009] Step S1, construction preparation;

[0010] Step S2, construction of the casting pedestal;

[0011] Step S3, steel bar construction;

[0012] Step S4, construction of embedded parts;

[0013] Step S5, formwork construction;

[0014] Step S6, concrete construction;

[0015] Step S7, curing construction;

[0016] Step S8, formwork removal;

[0017] Step S9, final product acceptance;

[0018] Step S10, component stacking;

[0019] Step S11, component transportation and installation.

[0020] Preferably, in Step S1, construction preparation includes the positioning of personnel, machinery, and materials; the review of design drawings; the examination and approval of construction plans; the education and training of operators, and the issuance of technical and safety disclosures.

[0021] Preferably, in Step S2, the construction of the casting pedestal includes the leveling of concrete and the installation of pedestal steel plates.

[0022] Preferably, in Step S3, in the steel bar construction, only the materials that have passed the appearance acceptance and mechanical property inspection of steel bars can be used. The semi-finished steel bars are processed and manufactured in a standardized steel bar processing center and transported to the construction site for binding;

[0023] The steel bar installation is strictly bound according to the spacing dimensions of the drawings. The lower opening of the formwork adopts a comb tooth form. The accuracy requirements for the steel bar size and spacing are relatively high. During binding, the spacing dimension marks need to be made on the ground or the steel bars in advance; strictly control the thickness of the concrete protective layer.

[0024] Preferably, in Step S4, the construction of embedded parts includes the lofting of the positions of embedded parts and the installation and fixation of embedded parts. The lifting rings should be installed according to the design positions, and the form of the lifting rings shall not be changed randomly during the installation process.

[0025] Preferably, in Step S5:

[0026] Step S51, on-site inspection and trial assembly of formwork, grinding and rust removal of formwork, and application of release agent;

[0027] Step S52, the bottom formwork adopts a combined form of concrete and steel panel, with PVC pipes embedded inside. The bottom plate and the wall formwork are fixed by passing through tie rods. The pile holes are welded with positioning blocks on the bottom plate steel panel in advance according to the design hole positions. The formwork of the reserved holes is directly installed between the positioning blocks;

[0028] The precast retaining wall side formwork adopts a fixed-type steel formwork, which consists of profiled steel, stiffening ribs, and a panel. The overall side formwork of the wall is composed of two side formworks spliced together. The bottom plate and the wall are fixed by tension bolts, and the tension is carried out by the drain holes on the wall 1; the outer side formwork is supported and fixed by inclined struts. Since there are embedded external extension steel bars at the lower opening of the inner side formwork, the upper and lower two formworks are connected by bolts, and the lower formwork adopts a comb tooth plate form;

[0029] The formwork construction is disassembled and installed by a 20t gantry crane.

[0030] Preferably, in Step S6:

[0031] Step S61: The concrete strength grade is C30, and it is poured using a hopper. Before the concrete pouring, the supports and formworks are inspected and records are made. After the concrete arrives at the pouring site, the test personnel must conduct a slump test on the concrete. The concrete is poured in two times. First, the bottom slab and three connecting short beams are poured, and then the wall body is poured.

[0032] Step S62: Control the elevation and flatness of the top surface of the wall body and the bottom slab, and at the same time make concrete test blocks.

[0033] Preferably, in Steps S7 and S8, during the curing process, it includes the curing of the L-shaped revetment structure poured in the formwork and the curing of the concrete test blocks. When the concrete test blocks reach the specified strength, the formwork can be removed.

[0034] Preferably, during the removal, it must be as stable as possible. First, slowly separate the formwork from the concrete outward, and then lift the formwork upward. For the positions of the square pile holes and the reserved holes of the steel sheet piles, use a high-pressure water gun to wash and roughen the positions in time after the formwork is removed.

[0035] Preferably, in Steps S10 and S11, after the component is hoisted to the storage position, the lifting points are painted with cement slurry. Before loading the vehicle, the appearance quality and dimensions of the component should be inspected. Determine the loading quantity according to the vehicle length. When loading the vehicle, fully consider the influence of the L-shaped wall on the change of the component's center of gravity. During the loading process, strictly confirm the loading direction. The components are loaded in the order of placing the retaining walls in different directions, one on the left and one on the right.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. For this L-shaped revetment structure, the wall body and the bottom slab are connected by short beams, and the three are an integrated structure. Moreover, adjacent two L-shaped revetment structures can be butted through the concave and convex grooves, which is convenient for later assembly, saving time and effort. The existence of the short beams does not affect the later actual installation of the connection by pouring points between the front sheet pile cap structure for retaining soil and the L-shaped revetment structure. By setting pile holes in the bottom slab, it can effectively correspond to the square pile cap structure in the actual installation. By pouring concrete inside the pile holes, the pouring point connection between the upper end of the square pile and the bottom slab can be realized, and together with the sheet piles, they can jointly bear the upper load. The overall operation is simple, time-saving and labor-saving.

[0038] 2. The integrated molding prefabrication method of the L-shaped revetment structure. The bottom mold adopts a combination form of concrete and steel panel, with PVC pipes embedded inside. The bottom plate and the wall formwork are fixed by passing through tie rods, so as to play a role in block support between the bottom plate and the wall and the tension between the inner and outer side formworks of the wall. The overall side formwork of the wall is spliced by two side formworks. The bottom plate and the wall are fixed by tension bolts to prevent the formwork from bulging during concrete pouring, and the tension is carried out by the drain holes on the wall; the outer side formwork is supported and fixed by inclined struts. Since there are embedded extended steel bars at the lower opening of the inner side formwork, the upper and lower two formworks are connected by bolts. The lower formwork adopts a comb-shaped plate form, and the formwork construction is installed and disassembled by a t gantry crane. The formwork construction is convenient to operate, can realize batch production of the L-shaped revetment structure, reduce construction errors, and ensure construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 FIG. 1 is one of the overall structure diagrams of the L-shaped revetment structure of the present invention;

[0040] Figure 2 FIG. 2 is another overall structure diagram of the L-shaped revetment structure of the present invention;

[0041] Figure 3 FIG. 3 is the process flow diagram of the integrated molding prefabrication of the L-shaped revetment structure of the present invention.

[0042] In the figures: 1. Wall; 101. Inclined drain hole; 2. Bottom plate; 201. Pile hole; 3. Short beam; 4. Concave-convex groove; 5. Suspension ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Please refer to Figures 1-3 , the integrated molding prefabrication method of the L-shaped revetment structure. The L-shaped revetment structure includes a wall body 1, a bottom plate 2 and a short beam 3. The bottom plate 2 is arranged at the lower end inside the wall body 1. The wall body 1 and the bottom plate 2 are connected by a short beam 3. Concave-convex grooves 4 for mutual cooperation and docking are provided at both ends of the wall body 1 and the bottom plate 2;

[0045] A plurality of pile holes 201 are provided on the side of the bottom plate 2 away from the short beam 3. Suspension rings 5 are provided on the upper surfaces of both the wall body 1 and the bottom plate 2;

[0046] The construction method includes:

[0047] Step S1, construction preparation;

[0048] Step S2, casting pedestal construction;

[0049] Step S3, steel bar construction;

[0050] Step S4, embedded part construction;

[0051] Step S5, formwork construction;

[0052] Step S6, concrete construction;

[0053] Step S7, curing construction;

[0054] Step S8, formwork removal;

[0055] Step S9, finished product acceptance;

[0056] Step S10, component storage;

[0057] Step S11, component transportation and installation.

[0058] Among them; in Step S1, construction preparation includes the positioning of personnel, machines and tools, and materials; the review of design drawings; the review and approval of construction plans; the education and training of operators and the issuance of technical and safety disclosures to ensure the orderly progress of subsequent construction and the safety of construction personnel; in Step S2, casting pedestal construction includes the leveling of concrete and the installation of pedestal steel plates to ensure the stability of the pedestal steel plates.

[0059] Among them; in Step S3, in steel bar construction, only the materials that have passed the appearance acceptance and mechanical property inspection of steel bars can be used. The semi-finished steel bars are processed and manufactured in a standardized steel bar processing center and transported to the construction site for binding, and the specifications and quantities meet the requirements of the drawings;

[0060] The steel bar installation is strictly bound according to the spacing dimensions of the drawings. Since the lower opening of the formwork adopts a comb tooth form, the accuracy requirements for the steel bar size and spacing are relatively high. During binding, the spacing dimension marks need to be made on the ground or on the steel bars in advance to facilitate subsequent formwork closing; strictly control the concrete cover thickness and use different size cushion blocks to meet the requirements of the cover thickness;

[0061] In Step S4, embedded part construction includes the layout of the positions of embedded parts and the installation and fixation of embedded parts. The lifting ring 5 should be installed according to the design position, and the form of the lifting ring 5 shall not be changed randomly during the installation process

[0062] Among them; in Step S5:

[0063] Step S51, inspection and trial assembly of formwork, grinding and rust removal of formwork and application of release agent;

[0064] Step S52: The bottom formwork adopts a combination form of concrete and steel panel, with PVC pipes embedded inside. The bottom plate 2 and the formwork of the wall body 1 are fixed by inserting tie rods, thus achieving block support between the bottom plate 2 and the wall body 1 and the tension between the inner and outer side formworks of the wall body 1. The pile holes 201 are provided with positioning blocks welded on the steel panel of the bottom plate 2 in advance according to the designed hole positions. The formwork of the reserved holes is directly installed between the positioning blocks to ensure more accurate pouring hole positions, and at the same time reduce the deviation of the formwork during the concrete pouring process, prevent the steel plate of the bottom plate 2 panel from being pulled up by the suction force between the bottom plate 2 and the pedestal during the lifting process. At the same time, holes are drilled at certain intervals on the bottom plate 2 panel to implant steel bars, and the steel plate panel and the concrete foundation are integrated through plug welding;

[0065] The side formwork of the precast retaining wall adopts a standardized steel formwork, which is composed of profiled steel, stiffeners and panels. The overall side formwork of the wall body 1 is composed of two side formworks spliced together. The bottom plate 2 and the wall body 1 are fixed by tension bolts to prevent the formwork from bulging during concrete pouring, and the tension is carried out by the drain holes on the wall body 1; The outer side formwork is supported and fixed by inclined struts. Since there are pre-embedded extended steel bars at the lower opening of the inner side formwork, the upper and lower two formworks are connected by bolts, and the lower formwork adopts a comb-tooth plate form; The wall-bottom pasting and thickening double-sided grout-stop process is used to prevent grout leakage at the junction of the bottom plate 2 and the wall body 2;

[0066] The formwork construction is installed and disassembled by a 20t gantry crane.

[0067] Among them; in step S6:

[0068] Step S61: The concrete strength grade is C30, and it is poured by a hopper. Before the concrete pouring, the supports and formworks are inspected and records are made; After the concrete arrives at the pouring site, the test personnel must conduct concrete slump detection; The concrete is poured in two times. First, the bottom plate 2 and three connecting short beams 3 are poured, and then the wall body 1 is poured to prevent the concrete at the positions of the three connecting short beams 3 of the wall body 1 from turning up, avoid the formation of cold joints after a long waiting time after the bottom plate 2 is poured, and take measures such as taking the lower limit value of the slump of the poured concrete bottom plate 2 and using wooden boards for backpressure; During the pouring process, check the retaining wall formwork at any time, and tighten the tie rods and other parts in time if loosening is found;

[0069] Step S62: Control the top elevation and flatness of the wall body 1 and the bottom plate 3, and at the same time make concrete test blocks.

[0070] Among them; in steps S7 and S8, the curing process includes curing the L-shaped revetment structure poured in the formwork and curing the concrete test blocks. When the concrete test blocks reach the specified strength, the formwork can be removed. During the removal, it must be as stable as possible. First, slowly separate the formwork from the concrete outward, and then lift the formwork upward; for the positions of the square pile holes and the reserved holes of the steel sheet piles, after form removal, immediately use a high-pressure water gun to scour the positions. The setting time of the retarder should be determined according to the form removal time, and the time cannot be too short to avoid affecting the scouring effect. The scoured surface should be such that gravel appears on the surface.

[0071] Among them; in steps S10 and S11, after the component is hoisted to the storage position, use cement slurry to coat the lifting points to prevent the lifting points from rusting during long-term storage; before loading, the appearance quality and dimensions of the component should be inspected; determine the loading quantity according to the vehicle length. When loading, fully consider the influence of the L-shaped wall on the change of the component's center of gravity. During the loading process, strictly confirm the loading direction. The components are loaded in the order of placing the retaining walls in different directions, one on the left and one on the right, to ensure that the transport vehicle remains balanced. After loading, use a chain block to tie and fix.

[0072] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The integral molding prefabrication method of the L-shaped revetment structure is characterized in that, L-shaped revetment structure, including a wall body (1), a bottom plate (2) and a short beam (3). The bottom plate (2) is arranged at the lower end inside the wall body (1). The wall body (1) and the bottom plate (2) are connected by the short beam (3). Concave-convex grooves (4) for mutual cooperation and butt joint are provided at both ends of the wall body (1) and the bottom plate (2). A plurality of pile holes (201) are provided on one side of the bottom plate (2) away from the short beam (3). Hoisting rings (5) are arranged on the upper surfaces of the wall body (1) and the bottom plate (2). Construction method, including: Step S1, construction preparation; Step S2, casting pedestal construction; Step S3, steel bar construction; Step S4, embedded part construction; Step S5, formwork construction; Step S6, concrete construction; Step S7, curing construction; Step S8, formwork removal; Step S9, finished product acceptance; Step S10, component storage; Step S11, component transportation and installation.

2. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In step S1, the construction preparation includes the positioning of personnel, machines and tools and materials; the review of design drawings; the examination and approval of construction plans; the education and training of operators and the issuance of technical and safety disclosures.

3. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that In step S2, the casting pedestal construction includes the leveling of concrete and the installation of pedestal steel plates.

4. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In step S3, in the steel bar construction, only the materials that have passed the appearance acceptance and mechanical property inspection of steel bars can be used. The semi-finished steel bars are processed and manufactured in a standardized steel bar processing center and transported to the construction site for binding; The steel bar installation is strictly bound according to the drawing spacing dimensions. The lower part of the formwork adopts a comb-tooth form. The accuracy requirements for the steel bar size and spacing are relatively high. Spacing dimension marks need to be made on the ground or on the steel bars in advance during binding; strictly control the concrete cover thickness.

5. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In step S4, the embedded part construction includes the lofting of the position of the embedded part and the installation and fixation of the embedded part. The hoisting ring (5) should be installed according to the design position, and the form of the hoisting ring (5) shall not be changed randomly during the installation process.

6. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In step S5: Step S51, inspection and trial assembly of the formwork, grinding and rust removal of the formwork and application of release agent; Step S52, the bottom formwork adopts a combination form of concrete and steel panel, with PVC pipes embedded inside. The bottom plate (2) and the wall body (1) formwork are fixed by passing through tie rods. The pile holes (201) are welded with positioning blocks on the bottom plate steel panel in advance according to the design hole positions, and the formwork of the reserved holes is directly installed between the positioning blocks; The precast retaining wall side formwork adopts a shaped steel formwork, which is composed of profiled steel, stiffening ribs and panels. The overall side formwork of the wall body (1) is spliced by two side formworks. The bottom plate (2) and the wall body (1) are fixed by tension bolts, and the tension is carried out by the drain holes on the wall body (1); the outer formwork is supported and fixed by inclined struts. Since there are external extended steel bars embedded at the lower part of the inner formwork, the upper and lower two formworks are connected by bolts, and the lower formwork adopts a comb-tooth plate form; The formwork construction is installed and disassembled by a 20t gantry crane.

7. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In step S6: Step S61: The concrete strength grade is C30, and it is poured using a hopper. Before concrete pouring, the supports and formworks are inspected and records are made. After the concrete arrives at the pouring site, the test personnel must conduct a slump test on the concrete. The concrete is poured in two times. First, the bottom plate (2) and three connecting short beams (3) are poured, and then the wall body (1) is poured. Step S62: Control the top elevation and flatness of the wall body (1) and the bottom plate (3), and at the same time make concrete test blocks.

8. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that, In Steps S7 and S8, the curing process includes curing the L-shaped revetment structure poured in the formwork and curing the concrete test blocks. When the concrete test blocks reach the specified strength, the formwork can be removed.

9. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 8, characterized in that, During removal, it must be as stable as possible. First, slowly separate the formwork from the concrete outward, and then lift the formwork upward. For the positions of the square pile holes and the reserved holes of the steel sheet piles, use a high-pressure water gun to flush the positions immediately after formwork removal.

10. The integrated molding prefabrication method of the L-shaped revetment structure according to claim 1, characterized in that In Steps S10 and S11, after the component is hoisted to the storage position, the lifting points are coated with cement slurry. Before loading, the appearance quality and dimensions of the component should be inspected. Determine the loading quantity according to the vehicle length. When loading, fully consider the influence of the L-shaped wall on the change of the component's center of gravity. During the loading process, strictly confirm the loading direction. The components are loaded in the order of placing the retaining walls in different directions, one on the left and one on the right.

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