Turnover type prefabricated steel guide wall for diaphragm wall construction and use method of turnover type prefabricated steel guide wall

Abstract

The invention discloses a turnover type prefabricated steel guide wall for diaphragm wall construction and a using method thereof, and relates to the technical field of diaphragm wall construction, the turnover type prefabricated steel guide wall comprises opposite and parallel prefabricated steel guide walls, each prefabricated steel guide wall is of a multi-section type assembly structure, and each section of prefabricated steel guide wall is of an L-shaped structure; each section of prefabricated steel guide wall is formed by welding square steel I, a steel plate, square steel II and a reinforcing rib plate; tooth-shaped connectors are reserved at the two ends of each section of prefabricated steel guide wall, and every two adjacent prefabricated steel guide walls on the same side are spliced through a tooth-shaped structure and connected into a detachable structure through a pin shaft assembly. The prefabricated steel guide walls on the two sides are transversely supported through the detachable steel inner supports, the movable hanging lugs and U-shaped plug pins, plug pin holes are formed in the top faces of the prefabricated steel guide walls, and the plug pin holes are matched with the U-shaped plug pins. The structure is stable and reliable, the construction efficiency can be improved, the construction cost can be reduced, and the construction quality can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-seepage wall construction, and in particular to a rotatable prefabricated steel guide wall for anti-seepage wall construction and a use method thereof. Background Art

[0002] During the construction of an anti-seepage wall, guide walls play a crucial role. They serve as the foundation for the wall, guiding trenching equipment and bearing water and soil pressure, as well as loads from construction machinery and equipment. Traditional guide walls are typically constructed using cast-in-place concrete. This type of guide wall has a long construction cycle and requires various steps, including formwork installation, concrete pouring, and curing, resulting in low efficiency. Furthermore, cast-in-place concrete guide walls are disposable and cannot be reused, resulting in wasted resources and increased construction costs. Furthermore, the quality of cast-in-place guide walls is significantly affected by on-site conditions and the skill level of the construction personnel, making quality consistency difficult to guarantee.

[0003] Therefore, the present invention proposes a recyclable prefabricated steel guide wall for use in anti-seepage wall construction and a method for using the same. Summary of the Invention

[0004] The purpose of the present invention is to provide a recyclable prefabricated steel guide wall for anti-seepage wall construction and a method of using the same, so as to solve the problems of the existing cast-in-place concrete guide wall, such as long construction period, inability to be recyclable, high construction cost and poor quality stability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A reusable prefabricated steel guide wall for use in anti-seepage wall construction and a method for using the same, comprising prefabricated steel guide walls arranged relative to and in parallel, the prefabricated steel guide walls being a multi-section assembled structure, each section of the prefabricated steel guide wall being L-shaped; each section of the prefabricated steel guide wall being welded from a first square steel, a steel plate, a second square steel, and a reinforcing rib;

[0007] Toothed interfaces are reserved at both ends of each section of prefabricated steel guide wall. Two adjacent prefabricated steel guide walls on the same side are spliced ​​together through the toothed structure and connected to form a detachable structure through a pin assembly.

[0008] It also includes: detachable steel inner supports, movable hanging ears, and prefabricated steel guide walls on both sides form a transverse support through the detachable steel inner supports, movable hanging ears and U-shaped latches, and the top surface of the prefabricated steel guide wall is provided with a latch hole, and the latch hole matches the U-shaped latch;

[0009] Furthermore, the pin shaft assembly includes multiple socket plates located on the same side and between two adjacent reinforcing ribs, and pins are vertically inserted between the socket plates; the two sections of prefabricated steel guide walls located on the same side are detachably connected through the mutual cooperation of the socket plates and the pins.

[0010] Furthermore, the movable hanging ear includes two symmetrically arranged special-shaped steel plates, and the two ends of the U-shaped pin are located on both sides of the special-shaped steel plates and inserted into the pin hole.

[0011] Two right-angle steels are fixed vertically and symmetrically on the sides of the two special-shaped steel plates that are close to each other, and a vertical slide groove is formed between the two right-angle steels. A bottom steel plate is fixed on the bottom of the sides of the two special-shaped steel plates that are close to each other;

[0012] Furthermore, the detachable steel inner support comprises two symmetrically arranged vertical inserts, and three reinforcing steel pipes are fixed between the two vertical inserts;

[0013] The two vertical plug plates are respectively slidably spliced ​​and combined with the two special-shaped steel plates through vertical sliding grooves.

[0014] Furthermore, a steel inner support lifting ring is fixed to the side surface of the uppermost reinforced steel pipe.

[0015] Furthermore, a steel guide wall lifting ring is fixed to the outer side surface of each section of the prefabricated steel guide wall.

[0016] A method for using a recyclable prefabricated steel guide wall for use in anti-seepage wall construction, the method comprising the following steps:

[0017] S1. Use CNC cutting and welding equipment to assemble the various components in the factory according to the design drawings, prefabricate, cut, weld, and correct them in batches, and then transport them as a set to the construction site for direct assembly;

[0018] S2. Use machinery to excavate and level the construction site, lay a 200mm thick graded gravel cushion layer with a flatness deviation of ≤5mm / m; measure and lay out the lines, locate the axis of the anti-seepage wall and the installation position of each prefabricated steel guide wall; hoist a single prefabricated steel guide wall using the steel guide wall lifting ring, and use the toothed structure to splice each other, insert the pin into the socket plate to complete the pin assembly to align one prefabricated steel guide wall with another prefabricated steel guide wall; after assembly and connection, check the verticality and use a laser line projector to calibrate. If the deviation exceeds 3mm, use steel wedges to adjust;

[0019] S3. Attach the movable hanging ear to the top of the prefabricated steel guide wall and secure it by inserting the U-shaped latch through the latch hole reserved in the top of the prefabricated steel guide wall;

[0020] S4. Use lifting equipment to lift the detachable steel inner support through the steel inner support lifting ring, and insert the vertical plug plate into the vertical slide groove formed between the two right-angled angle steels. The construction of cut-off walls of different widths can be achieved by adjusting the detachable steel inner support modules of different lengths to ensure that the support spacing error is ≤10mm;

[0021] S5. After the removable steel inner supports, movable hanging ears, and U-shaped pins form a stable support for the prefabricated steel guide walls, the inner area between the two prefabricated steel guide walls is backfilled. The lower layer is backfilled with plain soil, and the surface layer is leveled with precast concrete slabs.

[0022] S6. Use a hydraulic grab to carry out trenching operations. During the construction process, detect changes in internal support stress and deformation of the detachable steel internal supports. When the stress exceeds 80% of the design value, the detachable steel internal supports can be appropriately increased.

[0023] S7. After the anti-seepage wall is poured, it should be dismantled in the order of "internal support first, then guide wall", that is, the detachable steel internal support should be removed first and then the pin assembly. Use lifting equipment to avoid collision of components. After dismantling, the surface should be treated with anti-corrosion and painted with epoxy zinc-rich primer;

[0024] S8. After disassembly is completed, move to the next construction trench section.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention can improve construction efficiency: prefabricated steel guide walls, detachable hanging ears and steel inner supports can be prefabricated, cut, welded and corrected in large quantities in a factory to ensure processing accuracy and welding quality. They can then be transported as a set to the construction site for direct assembly and use. There is no need for on-site pouring and maintenance like cast-in-place concrete guide walls, which greatly shortens the construction period and improves construction efficiency.

[0027] 2. The present invention can reduce construction costs: the prefabricated steel guide wall of the present invention can be used in a turnover manner, which reduces material waste and reduces engineering costs; at the same time, due to the improvement of construction efficiency, the use time of manpower and equipment is also reduced, further reducing costs.

[0028] 3. The present invention can ensure construction quality: factory prefabrication can strictly control processing accuracy and welding quality. Compared with cast-in-place concrete guide walls under on-site construction conditions, the quality stability is higher, and the dimensional accuracy of prefabricated components is high, which is conducive to ensuring the construction quality of the anti-seepage wall.

[0029] 4. The structure of the present invention is stable and reliable: the adjacent steel guide walls are connected by toothed interfaces and pins, and the combined support of movable hanging ears and detachable steel inner supports forms a stable force system, which can effectively withstand various loads during the construction of the anti-seepage wall and ensure construction safety and construction accuracy of the anti-seepage wall.

[0030] In summary, the present invention BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a left side view of the present invention;

[0034] Figure 3 This is a schematic diagram of the installation of movable hanging ears and detachable steel inner supports between the prefabricated steel guide walls on both sides;

[0035] Figure 4 This is a schematic diagram of the structure of the detachable steel inner support;

[0036] Figure 5 Schematic diagram of the structure of the pin assembly;

[0037] Figure 6 This is a schematic diagram of the structure of the movable mounting ear.

[0038] In the figure: 1 square steel 1, 2 steel plate, 3 square steel 2, 4 reinforcing rib, 5 U-shaped pin, 6 steel guide wall lifting ring, 7 pin hole, 8 detachable steel inner support, 8-1 reinforcing steel pipe, 8-2 vertical plug plate, 8-3 steel inner support lifting ring, 9 pin shaft assembly, 9-1 pin, 9-2 plug plate, 10 movable hanging ear, 10-1 special-shaped steel plate, 10-2 right-angle steel, 10-3 bottom steel plate. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention;

[0040] Reference Figure 1-6 A reusable prefabricated steel guide wall for anti-seepage wall construction includes prefabricated steel guide walls arranged relatively and in parallel. The prefabricated steel guide wall is a multi-section assembled structure, and each section of the prefabricated steel guide wall is an L-shaped structure. Each section of the prefabricated steel guide wall is welded by a square steel 1, a steel plate 2, a square steel 2 3, and a reinforcing rib 4.

[0041] Toothed interfaces are reserved at both ends of each section of prefabricated steel guide wall. Two adjacent prefabricated steel guide walls on the same side are spliced ​​together through the toothed structure and connected to form a detachable structure through a pin assembly 9.

[0042] It also includes: a detachable steel inner support 8, a movable hanging ear 10, and a U-shaped latch 5 to form a transverse support between the prefabricated steel guide walls on both sides. The top surface of the prefabricated steel guide wall is provided with a latch hole 7, and the latch hole 7 matches the U-shaped latch 5;

[0043] The pin assembly 9 includes multiple socket plates 9-2 located on the same side and between two adjacent reinforcing ribs 4, and pins 9-1 are vertically inserted between the socket plates 9-2; the two sections of prefabricated steel guide walls located on the same side are detachably connected through the mutual cooperation between the socket plates 9-2 and the pins 9-1.

[0044] The movable mounting lug 10 comprises two symmetrically arranged special-shaped steel plates 10-1. The two ends of the U-shaped latch 5 are located on either side of the special-shaped steel plates 10-1 and inserted into the latch hole 7. The U-shaped latch 5, in conjunction with the latch hole 7, can form horizontal and vertical limits on the special-shaped steel plates 10-1.

[0045] Two right-angle steels 10-2 are vertically symmetrically fixed on the sides of the two special-shaped steel plates 10-1 that are close to each other, forming a vertical chute between the two right-angle steels 10-2. A bottom steel plate 10-3 is fixed on the bottom of the sides of the two special-shaped steel plates 10-1 that are close to each other.

[0046] The detachable steel inner support 8 includes two symmetrically arranged vertical inserts 8-2, and three reinforcing steel pipes 8-1 are fixed between the two vertical inserts 8-2;

[0047] The two vertical insert plates 8-2 are respectively slidably spliced ​​and combined with the two special-shaped steel plates 10-1 through vertical sliding grooves.

[0048] The bottom steel plate 10-3 is welded and fixed to the bottom of the special-shaped steel plate 10-1, which can limit the lower ends of the two vertical inserts 8-2 to prevent the detachable steel inner support 8 from vertical displacement;

[0049] A steel inner support lifting ring 8-3 is fixed to the side of the uppermost reinforcing steel pipe 8-1.

[0050] A steel guide wall lifting ring 6 is fixed to the outer side surface of each section of prefabricated steel guide wall.

[0051] A method for using a recyclable prefabricated steel guide wall for use in anti-seepage wall construction, the method comprising the following steps:

[0052] S1. Use CNC cutting and welding equipment to assemble square steel 1, steel plate, square steel 2, reinforcing ribs, and steel guide wall lifting rings in the factory according to the design drawings. They are prefabricated, cut, welded, and straightened in batches, and then delivered as a set to the construction site for direct assembly.

[0053] S2. Use machinery to excavate and level the construction site, lay a 200mm thick graded gravel cushion layer with a flatness deviation of ≤5mm / m; measure and lay out the lines, locate the axis of the anti-seepage wall and the installation position of each prefabricated steel guide wall; hoist a single prefabricated steel guide wall using the steel guide wall lifting ring, and use the toothed structure to splice each other, insert the pin into the socket plate to complete the pin assembly to align one prefabricated steel guide wall with another prefabricated steel guide wall; after assembly and connection, check the verticality and use a laser line projector to calibrate. If the deviation exceeds 3mm, use steel wedges to adjust;

[0054] S3. Attach the movable hanging ear to the top of the prefabricated steel guide wall and secure it by inserting the U-shaped latch through the latch hole reserved in the top of the prefabricated steel guide wall;

[0055] S4. Use lifting equipment to lift the detachable steel inner support through the steel inner support lifting ring, and insert the vertical plug plate into the vertical slide groove formed between the two right-angled angle steels. The construction of cut-off walls of different widths can be achieved by adjusting the detachable steel inner support modules of different lengths to ensure that the support spacing error is ≤10mm;

[0056] S5. After the removable steel inner supports, movable hanging ears, and U-shaped pins form a stable support for the prefabricated steel guide walls, the inner area between the two prefabricated steel guide walls is backfilled. The lower layer is backfilled with plain soil, and the surface layer is leveled with precast concrete slabs.

[0057] S6. Use a hydraulic grab to carry out trenching operations. During the construction process, detect changes in internal support stress and deformation of the detachable steel internal supports. When the stress exceeds 80% of the design value, the detachable steel internal supports can be appropriately increased.

[0058] S7. After the anti-seepage wall is poured, it should be dismantled in the order of "internal support first, then guide wall", that is, the detachable steel internal support should be removed first and then the pin assembly. Use lifting equipment to avoid collision of components. After dismantling, the surface should be treated with anti-corrosion and painted with epoxy zinc-rich primer;

[0059] S8. After disassembly is completed, move to the next construction trench section.

[0060] In this application, construction efficiency can be improved; the on-site assembly time is shortened by 60% compared with the cast-in-place guide wall, and the construction period of a single guide wall is shortened from 7 days to 2.5 days, speeding up the project progress.

[0061] It can significantly reduce costs: material reuse reduces guide wall costs by 40%, labor costs by 35%, and the overall construction cost by 25%-30%.

[0062] Achieve stable and controllable quality: the size deviation of factory prefabricated components is ≤1mm, the verticality is controlled within 0.5‰, and the accuracy of anti-seepage wall grooving is improved by 30%.

[0063] It can reduce concrete usage by more than 60% and construction waste emissions by 75%, meeting low-carbon construction requirements.

[0064] This application has a wide range of applications: it can be used for various anti-seepage wall projects such as water conservancy dams, subway foundation pits, sewage treatment pools, etc., and is especially suitable for projects with tight construction schedules and high environmental protection requirements.

Claims

1. A recyclable prefabricated steel guide wall for use in the construction of an anti-seepage wall, comprising prefabricated steel guide walls arranged oppositely and in parallel, characterized in that: The prefabricated steel guide wall is a multi-section assembled structure, and each section of the prefabricated steel guide wall is an L-shaped structure; each section of the prefabricated steel guide wall is welded by square steel 1 (1), steel plate (2), square steel 2 (3) and reinforcing rib plate (4); Toothed interfaces are reserved at both ends of each section of prefabricated steel guide wall, and two adjacent prefabricated steel guide walls on the same side are spliced ​​together through the toothed structure and connected to form a detachable structure through a pin assembly (9); The invention also includes: a detachable steel inner support (8), a movable hanging ear (10), and a transverse support is formed between the prefabricated steel guide walls on both sides through the detachable steel inner support (8), the movable hanging ear (10) and the U-shaped latch (5). The top surface of the prefabricated steel guide wall is provided with a latch hole (7), and the latch hole (7) matches the U-shaped latch (5).

2. A recyclable prefabricated steel guide wall for anti-seepage wall construction according to claim 1, characterized in that: The pin assembly (9) comprises a plurality of jack plates (9-2) located between two adjacent reinforcing ribs (4) on the same side, wherein a latch (9-1) is vertically inserted between the jack plates (9-2); and a detachable connection is achieved between two sections of prefabricated steel guide walls located on the same side through the mutual cooperation between the jack plates (9-2) and the latch (9-1).

3. The recyclable prefabricated steel guide wall for anti-seepage wall construction according to claim 2, characterized in that: The movable hanging ear (10) comprises two symmetrically arranged special-shaped steel plates (10-1), and the two ends of the U-shaped latch (5) are located on both sides of the special-shaped steel plates (10-1) and inserted into the latch hole (7). Two right-angle steels (10-2) are vertically symmetrically fixed on the sides of the two special-shaped steel plates (10-1) that are close to each other, a vertical slide groove is formed between the two right-angle steels (10-2), and a bottom steel plate (10-3) is fixed on the bottom of the sides of the two special-shaped steel plates (10-1) that are close to each other.

4. The recyclable prefabricated steel guide wall for anti-seepage wall construction according to claim 3, characterized in that: The detachable steel inner support (8) comprises two symmetrically arranged vertical inserts (8-2), and three reinforcing steel pipes (8-1) are fixed between the two vertical inserts (8-2); The two vertical inserting plates (8-2) are respectively slidably spliced ​​and assembled with the two special-shaped steel plates (10-1) via vertical sliding grooves.

5. The recyclable prefabricated steel guide wall for anti-seepage wall construction according to claim 4, characterized in that: A steel inner support lifting ring (8-3) is fixed to the side surface of the uppermost reinforcement steel pipe (8-1).

6. The recyclable prefabricated steel guide wall for anti-seepage wall construction according to claim 5, characterized in that: A steel guide wall lifting ring (6) is fixed to the outer side surface of each section of the prefabricated steel guide wall.

7. A method for using a recyclable prefabricated steel guide wall for the construction of the cut-off wall according to claim 6, characterized in that: The method comprises the following steps: S1. Use CNC cutting and welding equipment to assemble the various components in the factory according to the design drawings, prefabricate, cut, weld, and correct them in batches, and then transport them as a set to the construction site for direct assembly; S2. Use machinery to excavate and level the construction site, lay a 200mm thick graded gravel cushion layer with a flatness deviation of ≤5mm / m; measure and lay out the lines, locate the axis of the anti-seepage wall and the installation position of each prefabricated steel guide wall; hoist a single prefabricated steel guide wall using the steel guide wall lifting ring, and use the toothed structure to splice each other, insert the pin into the socket plate to complete the pin assembly to align one prefabricated steel guide wall with another prefabricated steel guide wall; after assembly and connection, check the verticality and use a laser line projector to calibrate. If the deviation exceeds 3mm, use steel wedges for adjustment; S3. Attach the movable hanging ear to the top of the prefabricated steel guide wall and secure it by inserting the U-shaped latch through the latch hole reserved in the top of the prefabricated steel guide wall; S4. Use lifting equipment to lift the detachable steel inner support through the steel inner support lifting ring, and insert the vertical plug plate into the vertical slide groove formed between the two right-angled angle steels. The construction of cut-off walls of different widths can be achieved by adjusting the detachable steel inner support modules of different lengths to ensure that the support spacing error is ≤10mm; S5. After the removable steel inner supports, movable hanging ears, and U-shaped pins form a stable support for the prefabricated steel guide walls, the inner area between the two prefabricated steel guide walls is backfilled. The lower layer is backfilled with plain soil, and the surface layer is leveled with precast concrete slabs. S6. Use a hydraulic grab to carry out trenching operations. During the construction process, detect changes in internal support stress and deformation of the detachable steel internal supports. When the stress exceeds 80% of the design value, the detachable steel internal supports can be appropriately increased. S7. After the anti-seepage wall is poured, it should be dismantled in the order of "internal support first, then guide wall". That is, the detachable steel internal support should be removed first, and then the pin assembly should be removed. Hoisting equipment should be used to avoid collision of components. After dismantling, the surface should be treated with anti-corrosion and painted with epoxy zinc-rich primer. S8. After disassembly is completed, move to the next construction trench section.

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