Open caisson passing riverway embankment protection wall structure and construction method

Abstract

The invention discloses an open caisson passing riverway embankment protection wall structure and a construction method. The open caisson passing riverway embankment protection wall structure comprises an existing open caisson, supporting piles, a newly-built retaining wall, a raft foundation, a balance component and a supporting beam. The supporting pile and the retaining wall serve as wall protecting components, the supporting pile is located on one side of the open caisson, the retaining wall is located above the open caisson and on the other side of the open caisson, and the raft foundation is located on the other side of the open caisson The part, influencing the flood discharge width of the river channel, of the open caisson is a breaking area, and the balance component is poured on the breaking area; one end of the bearing beam is supported and connected to the support pile, the middle crosses the open caisson and is connected with the balance component, and the other end of the bearing beam is supported on the raft foundation; for the part, above the open caisson, of the retaining wall, the supporting beam and the balance component serve as the lower portion of the retaining wall, and for the part, on the other side of the open caisson, of the retaining wall, the supporting beam and the upper portion of the raft foundation serve as the lower portion of the retaining wall. According to the method, the requirement that the river embankment passes through the open caisson on the basis that the river embankment design path is not changed and a municipal pipe network is not transferred is met.

Description

Technical Field

[0001] The invention relates to river regulation, and in particular to a river embankment protection wall structure passing through a caisson and a construction method. Background Art

[0002] There are many types of embankment projects, including river embankments, river embankments, lake embankments, sea embankments, etc. Different embankments are classified differently according to their location and function; river embankments refer to dams built on river banks to intercept water flows, prevent flooding, and prevent siltation. After the river embankments restrain floods, they can limit the floods in the floodway, increase the water depth and flow rate, and are conducive to flood discharge and sediment discharge, and strengthen the strength and stability of water conservancy. The retaining wall structure of the river embankment generally adopts support piles to maintain its structural stability.

[0003] In urban river regulation, river embankment construction is usually combined with river regulation, and sometimes it is accompanied by intersections with the original municipal pipeline network: after the municipal pipeline network jacking is completed, an inspection well is built with caisson as a support measure. The caisson is on the designed path of the river embankment and passes through the municipal pipeline network below and has an inspection well with a municipal pipeline network inside. If the river embankment is constructed according to the original design path, it will interfere with the caisson, especially the support piles cannot be constructed within the caisson range, and there are some areas of the caisson that affect the width of the river flood discharge.

[0004] In order to solve the above-mentioned comprehensive problems of river embankment construction, river regulation, and the intersection of the original municipal pipeline network, two measures are currently adopted: the first is to change the design path of the river embankment. If the design path of the river embankment deviates too much, new work such as bank filling and road occupation will be generated, which will generate a huge additional workload; the second is to relocate the original municipal pipeline network. If the original municipal pipeline network is an important pipeline network (for example, an important sewage pipe in the area with a daily discharge of more than 3,000 cubic meters), it will seriously delay the normal life of residents in the area. Summary of the invention

[0005] The purpose of the present invention is to provide a river embankment protective wall structure passing through a caisson, and a river embankment protective wall construction method passing through a caisson, which realizes the requirement of allowing the river embankment to pass through the caisson without changing the design path of the river embankment and without relocating the municipal pipeline network.

[0006] The technical solution adopted by the present invention is: A river embankment protection wall structure passing through a caisson comprises an existing caisson and supporting piles as well as a newly built retaining wall, a raft foundation, a balancing member and a supporting beam; the caisson is located on the designed path of the river embankment and passes through an inspection well with a municipal pipeline network below and a municipal pipeline network inside; the supporting piles and the retaining wall serve as the wall protection members along the river embankment; the supporting piles are located on one side of the caisson, the retaining wall is located above the caisson and on the other side of the caisson, and the raft foundation is located on the other side of the caisson; the portion of the caisson that affects the width of the river flood discharge is a broken area, and the balancing member is cast on the broken area to balance the caisson as a whole Weight, the balancing member includes a horizontal part and a vertical part, the horizontal part is used as part of the river channel; one end of the supporting beam is supported and connected to the supporting pile, the middle spans the caisson and is connected to the vertical part of the balancing member, and the other end is supported on the raft foundation; for the part of the retaining wall above the caisson, the supporting beam and the vertical part of the balancing member are used as the lower part of the retaining wall, and for the part of the retaining wall on the other side of the caisson, the supporting beam and the upper part of the raft foundation are used as the lower part of the retaining wall. The raft foundation, the supporting beam and the balancing member are cast as one piece, and the upper part of the retaining wall is later cast on the lower part of the retaining wall with a waterstop provided between the two.

[0007] Preferably, a cantilever platform is provided on the retaining wall and on the supporting beam above the supporting piles, the upper portion of the retaining wall and the cantilever platform are cast integrally, and the supporting beam and the cantilever platform are cast integrally.

[0008] A method for constructing a protective wall of a river embankment through a caisson, in which, when a caisson and supporting piles are already present, the caisson is located on a designed path of the river embankment and passes through an inspection well with a municipal pipeline network below and inside, and the supporting piles serve as protective wall components along the river embankment and are located on one side of the caisson; without changing the designed path of the river embankment and without relocating the municipal pipeline network, a retaining wall, a raft foundation, a balancing component and a supporting beam are newly constructed: the retaining wall serves as a protective wall component along the river embankment and is located above the caisson and on the other side of the caisson, the raft foundation is located on the other side of the caisson, the area on the caisson that affects the width of the river flood discharge is removed, and the balancing component and the supporting beam are newly constructed. The components are cast on the demolished area to balance the overall weight of the caisson. The balancing component includes a horizontal part and a vertical part. The horizontal part is used as part of the river channel. One end of the supporting beam is supported and connected to the supporting piles, the middle spans the caisson and is connected to the vertical part of the balancing component, and the other end is supported on the raft foundation. For the part of the retaining wall above the caisson, the supporting beam and the vertical part of the balancing component are used as the lower part of the retaining wall. For the part of the retaining wall on the other side of the caisson, the supporting beam and the upper part of the raft foundation are used as the lower part of the retaining wall. The raft foundation, supporting beam and balancing component are cast as one body, and the upper part of the retaining wall is cast on the lower part of the retaining wall and a waterstop is arranged between the two.

[0009] Specifically, the following steps are included: S1) Locate and lay out the design path of the river embankment, and mark the area on the caisson that affects the width of the river flood discharge; S2) First excavate the earthwork of the raft foundation and the retaining wall on the other side of the caisson, then pour the concrete cushion layer of the raft foundation, and then set the raft foundation steel bars and support the raft foundation formwork; S3) First excavate the earthwork in the caisson demolition area, and perform demolition operations and reserve steel bars, and then set the balance component steel bars and support the balance component formwork; S4) First set the supporting beam steel bars, one end of the supporting beam steel bars is connected to the supporting pile head steel bars, and the middle span The caisson is connected with the steel bars of the balance component and the other end is connected with the steel bars of the raft foundation. A water stop is set on the steel bars of the supporting beam, and then a supporting beam formwork is supported. The supporting beam formwork above the caisson is connected with the balance component formwork, and the supporting beam formwork on the other side of the caisson is connected with the raft foundation formwork. Then, the raft foundation, the supporting beam and the balance component are cast as a whole, and the water stop and part of the supporting beam steel bars extend out of the top surface of the supporting beam; S5) The supporting beam is roughened first, and then the upper steel bars of the retaining wall are set, and then the upper formwork of the retaining wall is supported, and then the upper part of the retaining wall is cast; S6) The rear side of the retaining wall is backfilled and compacted.

[0010] Preferably, in step S2), before pouring the concrete cushion layer of the raft foundation, the bearing capacity of the foundation is tested. If the test is qualified, the concrete cushion layer is poured. If the test is unqualified, the foundation is replaced.

[0011] Preferably, in step S3), the method for performing the demolition operation on the demolition area of ​​the caisson is: firstly cutting with a wire saw to separate the cut-off part, and then manually breaking the concrete to clean and reserve the exposed steel bars.

[0012] Preferably, in step S4), the waterstop is a steel plate waterstop, which is located in the middle of the retaining wall in the width direction, with both ends of the steel plate waterstop bent to face the river channel side, and the steel plate waterstop is fixed to the supporting beam steel bars by steel bar welding, and adjacent steel plate waterstops are overlapped and welded.

[0013] Preferably, if the retaining wall is too long, a separation joint is set at every other section and foam boards are filled between the joints to prevent shrinkage and deformation of the concrete.

[0014] Preferably, drainage holes are provided for the portion of the retaining wall on the other side of the caisson, the drainage holes are inclined downward from the inside of the wall to the outside of the wall, and anti-filter geotextile or gravel for filtration is laid in the drainage hole area inside the retaining wall.

[0015] Preferably, a cantilever platform is provided on the retaining wall and on the supporting beam above the supporting piles, the upper portion of the retaining wall and the cantilever platform are cast integrally, and the supporting beam and the cantilever platform are cast integrally.

[0016] The beneficial effects of the present invention are: In the present application, retaining walls are arranged above the caisson and on the other side of the caisson to replace the originally designed supporting piles. The retaining wall above the caisson is supported on the raft foundation and supporting piles on both sides by supporting beams, thereby forming a bending-resistant effect and avoiding damage to the caisson below due to excessive weight of the retaining wall. Only the part of the caisson that affects the width of the river flood discharge needs to be broken, and the balancing component can also balance the overall weight of the caisson to offset the impact of the breaking operation. Therefore, the caisson and the municipal pipeline network and inspection wells within its range will not be damaged or affected, and there is no need to change the design path of the river embankment. Therefore, the requirement of allowing the river embankment to pass through the caisson is achieved without changing the design path of the river embankment and without relocating the municipal pipeline network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic plan view of a river bank protection wall structure passing through a caisson in an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.

[0019] Figure 3 yes Figure 1 Cross-sectional view at the middle BB.

[0020] Figure 4 yes Figure 1 Cross-sectional view at CC.

[0021] In the figure: 1 is the supporting pile, 2 is the supporting beam, 3 is the caisson, 4 is the inspection well, 5 is the raft foundation, 6 is the retaining wall, 7 is the cantilever platform, 8 is the drainage hole, 9 is the anti-filtration geotextile, 10 is the water stop belt, 11 is the balance member, 12 is the reserved steel bar, 13 is the municipal pipe network, and Z is the demolition area. DETAILED DESCRIPTION

[0022] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Embodiment 1 This embodiment discloses a river embankment protection wall structure passing through a caisson, which is used to achieve the requirement of allowing the river embankment to pass through the caisson 3 without changing the design path of the river embankment and without relocating the municipal pipe network 13. Figures 1 to 4 As shown, it includes a caisson 3, supporting piles 1, a retaining wall 6, a raft foundation 5, a balancing member 11 and a supporting beam 2.

[0024] Among them, the caisson 3 and the supporting pile 1 are existing structures; and: Figure 1 and Figure 3 As shown, the caisson 3 is located on the designed path of the river embankment and passes through the municipal pipe network 13 below, and the inspection well 4 with the municipal pipe network 13 inside is provided. The part of the caisson 3 that affects the flood discharge width of the river is the demolition area Z; Figure 1As shown, the support pile 1 is located on one side of the caisson 3 as a wall protection component along the river embankment.

[0025] Among them, the retaining wall 6, the raft foundation 5, the balancing member 11 and the supporting beam 2 belong to the newly built structure; and: Figure 1 As shown, the raft foundation 5 is located on the other side of the caisson 3; Figure 3 As shown, the balance member 11 is cast on the broken area Z to balance the overall weight of the caisson 3. The balance member 11 includes a horizontal part and a vertical part. The horizontal part is used as part of the river channel. Figures 1 to 4 As shown, one end of the supporting beam 2 is supported and connected to the supporting pile 1, the middle spans the caisson 3 and is connected to the vertical part of the balance member 11, and the other end is supported on the raft foundation 5; Figures 1 to 3 As shown, the retaining wall 6 serves as a wall protection member along the river embankment and is located above the caisson 3 and on the other side of the caisson 3. For the portion of the retaining wall 6 above the caisson 3, the vertical portion of the supporting beam 2 and the balancing member 11 serves as the lower portion of the retaining wall 6. For the portion of the retaining wall 6 on the other side of the caisson 3, the supporting beam 2 and the upper portion of the raft foundation 5 serve as the lower portion of the retaining wall 6. The raft foundation 5, the supporting beam 2, and the balancing member 11 are cast as one piece, and the upper portion of the retaining wall 6 is later cast on the lower portion of the retaining wall 6 with a waterstop 10 arranged between the two.

[0026] like Figures 2 to 4 As shown, in this embodiment, a cantilever platform 7 is provided on the retaining wall 6 and the supporting beam 2 above the supporting pile 1, the upper part of the retaining wall 6 and the cantilever platform 7 are cast integrally, and the supporting beam 2 and the cantilever platform 7 are cast integrally.

[0027] Embodiment 2 The present embodiment discloses a method for constructing a protective wall of a river embankment through a caisson. In the case of an existing caisson 3 and a supporting pile 1, the caisson 3 is located on the design path of the river embankment and passes through a municipal pipeline 13 below, and an inspection well 4 is provided with the municipal pipeline 13 inside. The supporting pile 1 serves as a protective wall component along the river embankment and is located on one side of the caisson 3. On the basis of not changing the design path of the river embankment and not relocating the municipal pipeline 13, a retaining wall 6, a raft foundation 5, a balancing component 11 and a supporting beam 2 are newly constructed: Figures 1 to 4As shown, the retaining wall 6 serves as a protective wall component along the river embankment and is located above the caisson 3 and on the other side of the caisson 3. The raft foundation 5 is located on the other side of the caisson 3. The area on the caisson 3 that affects the width of the river flood discharge is removed. The balancing member 11 is later cast on the removed area Z to balance the overall weight of the caisson 3. The balancing member 11 includes a horizontal portion and a vertical portion. The horizontal portion is used as part of the river channel. One end of the supporting beam 2 is supported and connected to the supporting pile 1, the middle spans the caisson 3 and is connected to the vertical portion of the balancing member 11, and the other end is supported on the raft foundation 5. For the portion of the retaining wall 6 above the caisson 3, the supporting beam 2 and the vertical portion of the balancing member 11 are used as the lower portion of the retaining wall. For the portion of the retaining wall 6 on the other side of the caisson 3, the supporting beam 2 and the upper portion of the raft foundation 5 are used as the lower portion of the retaining wall 6. The raft foundation 5, the supporting beam 2, and the balancing member 11 are cast as one piece. The upper portion of the retaining wall 6 is later cast on the lower portion of the retaining wall 6 and a waterstop 10 is provided between the two.

[0028] The specific steps include: S1) Locate and lay out the design path of the river embankment and mark the area on caisson 3 that affects the flood discharge width of the river.

[0029] S2) excavating the earthwork of the raft foundation 5 and the retaining wall 6 on the other side of the caisson 3, pouring the concrete cushion of the raft foundation 5, setting the steel bars of the raft foundation 5, and supporting the formwork of the raft foundation 5; Before pouring the concrete cushion layer of the raft foundation 5, the bearing capacity of the foundation is tested first. If the test is qualified, the concrete cushion layer is poured. If the test is unqualified, the foundation is replaced.

[0030] S3) First, excavate the caisson 3 to remove the earthwork in the area Z, and perform the removal operation and reserve the steel bars 12, then set the steel bars of the balancing member 11 and support the template of the balancing member 11; The method for performing the demolition operation on the demolition area Z of the caisson 3 is: firstly use a wire saw to cut and separate the cut-off part, and then manually break the concrete to clean and reserve the exposed steel bars 12.

[0031] S4) firstly arrange the steel bars of the supporting beam 2, one end of the steel bars of the supporting beam 2 is connected to the steel bars of the pile head of the supporting pile 1, the middle crosses the caisson 3 and is connected to the steel bars of the balancing member 11, and the other end is connected to the steel bars of the raft foundation 5, a water stop 10 is arranged on the steel bars of the supporting beam 2, and then the template of the supporting beam 2 is supported, the template of the supporting beam 2 above the caisson 3 is butted with the template of the balancing member 11, and the template of the supporting beam 2 on the other side of the caisson 3 is butted with the template of the raft foundation 5, and then the raft foundation 5, the supporting beam 2 and the balancing member 11 are cast in one piece, and the water stop 10 and part of the steel bars of the supporting beam 2 extend out of the top surface of the supporting beam 2; The waterstop 10 is a steel plate waterstop, which is located in the middle of the retaining wall 6 in the width direction. Both ends of the steel plate waterstop are bent to face the river channel. The steel plate waterstop is fixed to the steel bars of the supporting beam 2 by steel bar welding. Adjacent steel plate waterstops are overlapped and welded and fixed. For example, the size of the steel plate waterstop is 300x3mm, the overlap length is 100mm, and double-sided welding is used at the overlap.

[0032] S5) Firstly, the supporting beam 2 is roughened, then the upper reinforcement of the retaining wall 6 is arranged, then the upper formwork of the retaining wall 6 is supported, and then the upper part of the retaining wall 6 is cast.

[0033] S6) Backfill and compact the rear side of retaining wall 6.

[0034] After the pouring construction of the above processes is completed, watering and curing should be carried out in time. The curing time is generally 7-14 days. During the curing process, the concrete strength is tested using a rebound tester, and the formwork is removed after reaching 100% of the design strength.

[0035] In this embodiment, if the retaining wall 6 is too long, a separation joint is set every section and the gap is filled with foam board to prevent shrinkage and deformation of concrete. For example, a 2 cm separation joint is set every 10 m and the gap is filled with high-pressure polyethylene closed-cell foam board.

[0036] In this embodiment, if Figure 2 As shown, for the portion of the retaining wall 6 on the other side of the caisson 3, a drainage hole 8 is provided, and the drainage hole 8 is inclined downward from the inside of the wall to the outside of the wall. The drainage hole 8 area on the inner side of the retaining wall 6 is paved with anti-filter geotextile 9 or gravel for filtration. For example, the drainage holes 8 are arranged in a plum blossom shape, with a spacing of 2m and a hole diameter of 5cm.

[0037] In this embodiment, if Figures 2 to 4 As shown, a cantilever platform 7 is provided on the retaining wall 6 and the supporting beam 2 above the supporting pile 1, the upper part of the retaining wall 6 and the cantilever platform 7 are cast integrally, and the supporting beam 2 and the cantilever platform 7 are cast integrally.

[0038] In the present application, a retaining wall 6 is arranged above the caisson 3 and on the other side of the caisson 3 to replace the originally designed supporting piles 1. The retaining wall 6 above the caisson 3 is supported on the raft foundation 5 and the supporting piles 1 on both sides by the supporting beam 2, thereby forming a bending-resistant effect, thereby avoiding damage to the caisson 3 below due to excessive weight of the retaining wall 6. Only the part of the caisson 3 that affects the width of the river flood discharge needs to be broken, and the balancing member 11 can also balance the overall weight of the caisson 3 to offset the impact of the breaking operation. Therefore, the caisson 3 and the municipal pipeline 13 and inspection well 4 within its range will not be damaged or affected, and there is no need to change the design path of the river embankment. Therefore, the requirement of allowing the river embankment to pass through the caisson 3 is achieved without changing the design path of the river embankment and without relocating the municipal pipeline 13.

[0039] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A river embankment protection wall structure passing through a caisson, characterized in that: It includes existing caissons and supporting piles as well as newly built retaining walls, raft foundations, balancing components and supporting beams; the caisson is located on the designed path of the river embankment and passes through an inspection well with a municipal pipeline network below and inside; the supporting piles and retaining walls serve as wall protection components along the river embankment; the supporting piles are located on one side of the caisson, the retaining wall is located above the caisson and on the other side of the caisson, and the raft foundation is located on the other side of the caisson; the part of the caisson that affects the width of the river flood discharge is the broken area, and the balancing component is cast on the broken area to balance the overall weight of the caisson, and the balancing component is cast on the broken area to balance the overall weight of the caisson. It includes a horizontal part and a vertical part, the horizontal part is used as part of the river channel; one end of the supporting beam is supported and connected to the supporting pile, the middle spans the caisson and is connected to the vertical part of the balance member, and the other end is supported on the raft foundation; for the part of the retaining wall above the caisson, the supporting beam and the vertical part of the balance member are used as the lower part of the retaining wall, and for the part of the retaining wall on the other side of the caisson, the supporting beam and the upper part of the raft foundation are used as the lower part of the retaining wall. The raft foundation, the supporting beam and the balance member are cast as a whole, and the upper part of the retaining wall is later cast on the lower part of the retaining wall with a waterstop provided between the two.

2. The river bank protection wall structure for the caisson according to claim 1, characterized in that: A cantilever platform is provided on the retaining wall and on the supporting beam above the supporting piles. The upper portion of the retaining wall and the cantilever platform are cast integrally, and the supporting beam and the cantilever platform are cast integrally.

3. A method for constructing a river embankment protection wall through a caisson, characterized in that: In the case of existing caissons and supporting piles, the caisson is located on the design path of the river embankment and passes through an inspection well with a municipal pipeline network below and inside. The supporting piles serve as wall protection components along the river embankment and are located on one side of the caisson; without changing the design path of the river embankment and without relocating the municipal pipeline network, new retaining walls, raft foundations, balancing components and supporting beams are built: the retaining wall serves as a wall protection component along the river embankment and is located above the caisson and on the other side of the caisson, the raft foundation is located on the other side of the caisson, the area on the caisson that affects the width of the river flood discharge is removed, and the balancing component is cast later in the removed area To balance the overall weight of the caisson, the balancing component includes a horizontal part and a vertical part. The horizontal part is used as part of the river channel. One end of the supporting beam is supported and connected to the supporting pile, the middle spans the caisson and is connected to the vertical part of the balancing component, and the other end is supported on the raft foundation. For the part of the retaining wall above the caisson, the supporting beam and the vertical part of the balancing component are used as the lower part of the retaining wall. For the part of the retaining wall on the other side of the caisson, the supporting beam and the upper part of the raft foundation are used as the lower part of the retaining wall. The raft foundation, the supporting beam and the balancing component are cast as one piece, and the upper part of the retaining wall is later cast on the lower part of the retaining wall with a waterstop provided between the two.

4. The method for constructing a river bank protection wall through a caisson as claimed in claim 3, characterized in that: The following steps are involved: S1) Locate and lay out the design path of the river embankment, and mark the area on the caisson that affects the width of the river flood discharge; S2) First excavate the earthwork of the raft foundation and the retaining wall on the other side of the caisson, then pour the concrete cushion layer of the raft foundation, and then set the raft foundation steel bars and support the raft foundation formwork; S3) First excavate the earthwork in the caisson demolition area, and carry out demolition operations and reserve steel bars, and then set the balance component steel bars and support the balance component formwork; S4) First set the supporting beam steel bars, one end of the supporting beam steel bars is connected to the supporting pile head steel bars, the middle spans the caisson and is connected to the balancing component steel bars. The steel bars of the balance component are connected, and the other end is connected to the steel bars of the raft foundation. A waterstop is set on the steel bars of the supporting beam, and then the supporting beam formwork is supported. The supporting beam formwork above the caisson is connected to the balance component formwork, and the supporting beam formwork on the other side of the caisson is connected to the raft foundation formwork, and then the raft foundation, the supporting beam and the balance component are cast as a whole, and the waterstop and part of the supporting beam steel bars extend out of the top surface of the supporting beam; S5) First, the supporting beam is roughened, and then the upper steel bars of the retaining wall are set, and then the upper formwork of the retaining wall is supported, and then the upper part of the retaining wall is cast; S6) The back side of the retaining wall is backfilled and compacted.

5. The method for constructing a river bank protection wall through a caisson as claimed in claim 4, characterized in that In step S2), before pouring the concrete cushion layer of the raft foundation, the bearing capacity of the foundation is tested. If the test is qualified, the concrete cushion layer is poured. If the test is unqualified, the foundation is replaced.

6. The method for constructing a river bank protection wall through a caisson as claimed in claim 4, characterized in that In step S3), the method for performing the demolition operation on the demolition area of ​​the caisson is: firstly, a wire saw is used to cut and separate the cut-off part, and then the concrete is manually broken to clean and reserve the exposed steel bars.

7. The method for constructing a river bank protection wall through a caisson as claimed in claim 4, characterized in that In step S4), the waterstop is a steel plate waterstop, which is located in the middle of the retaining wall in the width direction, with both ends of the steel plate waterstop bent to face the river channel. The steel plate waterstop is fixed to the supporting beam steel bars by steel bar welding, and adjacent steel plate waterstops are overlapped and welded.

8. The method for constructing a river bank protection wall through a caisson as claimed in claim 3 or 4, characterized in that If the retaining wall is too long, a separation joint should be set at every section and foam boards should be filled between the joints to prevent shrinkage and deformation of the concrete.

9. The method for constructing a river bank protection wall through a caisson as claimed in claim 3 or 4, characterized in that For the portion of the retaining wall on the other side of the caisson, drainage holes are arranged, the drainage holes are inclined downward from the inside of the wall to the outside of the wall, and anti-filter geotextile or gravel for filtering is laid in the drainage hole area inside the retaining wall.

10. The method for constructing a river bank protection wall through a caisson as claimed in claim 3 or 4, characterized in that A cantilever platform is provided on the retaining wall and on the supporting beam above the supporting piles. The upper portion of the retaining wall and the cantilever platform are cast integrally, and the supporting beam and the cantilever platform are cast integrally.

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