A dike structure for protecting ancient trees

Abstract

The present invention discloses a dike structure for protecting ancient trees, which includes an ancient tree protection section, a connection section and a standard section dike; the upstream and downstream sides of the ancient tree protection section are respectively connected to the standard section dike through the connection section, and the ancient tree protection section includes a lower retaining wall of the protection section, a slope protection of the protection section, an upper retaining wall of the protection section, a road surface structure of the protection section, a foundation of the protection section, ancient trees and landscape lights; the connection section includes a lower retaining wall of the connection section, a slope protection of the connection section, an upper retaining wall of the connection section, a road surface structure of the connection section and a foundation of the connection section. Under the condition of fully protecting ancient trees, the structure of the present invention ensures the flood discharge function of the existing river channel, reduces the burial depth of the existing ancient trees as much as possible, ensures their survival rate, and at the same time combines technologies such as the hydrophilic function of the dike, ecological environmental protection and night view light show to create a modern happy river channel and increase the comfort of citizens' lives. The structure of the present invention is ecological and environmentally friendly, has a good hydrophilic landscape effect, and optimizes the project investment and operation management and maintenance costs.

Description

Technical Field

[0001] The present invention relates to a dike structure, and more particularly to a dike structure for protecting ancient trees. Background Art

[0002] Currently, during the construction of dikes, if there are large trees or other obstacles, and it is not convenient to relocate them and the dike route cannot be adjusted, generally, methods such as cutting and destroying are chosen. However, this method violates the current ecological and environmental protection theory. Therefore, there is an urgent need for innovative ideas to invent a new type of dike structure for protecting ancient trees that can not only not affect the flood discharge capacity of the river but also fully preserve the existing ancient trees. Summary of the Invention

[0003] To solve the problems existing in the prior art, the present invention proposes a dike structure for protecting ancient trees, which can neither affect the flood discharge capacity of the river nor fully preserve the existing ancient trees.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A dike structure for protecting ancient trees includes an ancient tree protection section, a connection section, and a standard section of the dike; the upstream side of the ancient tree protection section is connected to the upstream side of the standard section of the dike through the connection section, and the downstream side of the ancient tree protection section is connected to the downstream side of the standard section of the dike through the connection section;

[0006] The ancient tree protection section includes a lower retaining wall of the protection section, a slope protection of the protection section, an upper retaining wall of the protection section, a road surface structure of the protection section, a foundation of the protection section, an ancient tree, and a landscape lamp; the lower retaining wall of the protection section is connected to the upper retaining wall of the protection section through the slope protection of the protection section, the road surface structure of the protection section is arranged on the top surface of the foundation of the protection section, one side of the road surface structure of the protection section is connected to the upper retaining wall of the protection section, the foundation of the protection section is respectively connected to the lower retaining wall of the protection section, the slope protection of the protection section, the upper retaining wall of the protection section, and the bottom of the ancient tree, and the landscape lamp is connected to the upper part of the ancient tree.

[0007] The connection section includes a lower retaining wall of the connection section, a slope protection of the connection section, an upper retaining wall of the connection section, a road surface structure of the connection section, and a foundation of the connection section; the lower retaining wall of the connection section is connected to the upper retaining wall of the connection section through the slope protection of the connection section, the road surface structure of the connection section is arranged on the top surface of the foundation of the connection section, one side of the road surface structure of the connection section is connected to the upper retaining wall of the connection section, and the foundation of the connection section is respectively connected to the lower retaining wall of the connection section, the slope protection of the connection section, and the upper retaining wall of the connection section.

[0008] The standard section dike includes a lower retaining wall of the standard section, a slope protection of the standard section, an upper retaining wall of the standard section, a pavement structure of the standard section, and a foundation of the standard section; the lower retaining wall of the standard section is connected to the upper retaining wall of the standard section through the slope protection of the standard section, the pavement structure of the standard section is arranged on the top surface of the foundation of the standard section, one side of the pavement structure of the standard section is connected to the upper retaining wall of the standard section, and the foundation of the standard section is respectively connected to the lower retaining wall of the standard section, the slope protection of the standard section, and the upper retaining wall of the standard section.

[0009] The lower retaining wall of the protection section is connected to the lower retaining wall of the standard section through the lower retaining wall of the connection section, the slope protection of the protection section is connected to the slope protection of the standard section through the slope protection of the connection section, the upper retaining wall of the protection section is connected to the upper retaining wall of the standard section through the upper retaining wall of the connection section, the pavement structure of the protection section is connected to the pavement structure of the standard section through the pavement structure of the connection section, and the foundation of the protection section is connected to the foundation of the standard section through the foundation of the connection section.

[0010] Furthermore, the lower retaining wall of the protection section includes an anti-scour front toe of the protection section, a bottom plate of the protection section, a reserved hole of the protection section, a protection cylinder of the protection section, a drainage hole of the protection section, and a protection wall of the protection section; the top surface of the anti-scour front toe of the protection section is connected to the bottom plate of the protection section, the reserved hole of the protection section is arranged in the middle of the bottom plate of the protection section, the protection cylinder of the protection section is connected to the inner wall of the cavity of the reserved hole of the protection section, the drainage hole of the protection section is arranged inside the bottom plate of the protection section, one end of the drainage hole of the protection section is connected to the reserved hole of the protection section and the protection cylinder of the protection section, and the bottom of the protection wall of the protection section is connected to the bottom plate of the protection section; the ancient tree is arranged inside the reserved hole of the protection section and the protection cylinder of the protection section at the same time.

[0011] The upper retaining wall of the protection section includes a main body of the upper retaining wall of the protection section, an upper cantilever of the protection section, a cantilever column of the protection section, and a guardrail of the protection section; the top surface of the main body of the upper retaining wall of the protection section is connected to the upper cantilever of the protection section, the top surface of the cantilever column of the protection section is connected to the bottom surface of the upper cantilever of the protection section, and the guardrail of the protection section is arranged on the outer side of the top surface of the upper cantilever of the protection section; the cantilever column of the protection section is arranged on the top surface of the lower retaining wall of the protection section, and the cantilever column of the protection section is arranged on the top surface of the protection wall of the protection section.

[0012] The lower retaining wall of the connection section includes an anti-scour front toe of the connection section, a bottom plate of the connection section, and a protection wall of the connection section; the anti-scour front toe of the connection section is connected to the bottom surface of the bottom plate of the connection section, and the protection wall of the connection section is arranged on the top surface of the bottom plate of the connection section.

[0013] The upper retaining wall of the connection section includes a main body of the upper retaining wall of the connection section, an upper cantilever of the connection section, and a guardrail of the connection section; the top surface of the main body of the upper retaining wall of the connection section is connected to the upper cantilever of the connection section, and the guardrail of the connection section is arranged on the outer side of the top surface of the upper cantilever of the connection section.

[0014] The upper retaining wall of the standard section includes a main body of the upper retaining wall of the standard section and a guardrail of the standard section; the guardrail of the standard section is arranged on the outer side of the top surface of the main body of the upper retaining wall of the standard section.

[0015] The anti-scour front toe of the protection section is connected to the anti-scour front toe of the connection section, the bottom slab of the protection section is connected to the bottom slab of the connection section, the protection wall of the protection section is connected to the lower retaining wall of the standard section through the protection wall of the connection section, and the bottom slab of the connection section is connected to the bottom of the lower retaining wall of the standard section.

[0016] The main body of the upper retaining wall of the protection section is connected to the main body of the upper retaining wall of the standard section through the main body of the upper retaining wall of the connection section, and the upper overhanging platform of the connection section is connected to the upper overhanging platform of the protection section.

[0017] Furthermore, there are two or more ancient tree protection sections, connection sections, and standard section levees.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. Through innovative structural design, the present invention minimizes the adverse effects such as burying the floating soil of existing ancient trees. The thick floating soil of the levee is blocked inside the ancient trees by a lightweight reinforced concrete structure. At the same time, a hollow protective cylinder structure is used to protect the periphery of the bottom trunk of the ancient tree, and drain pipes are used to reduce the adverse effects of waterlogging immersion. By adopting a jump platform structure to closely integrate with the upper landscape of the ancient tree and combining with the night light show effect, a beautiful "Christmas ancient tree" effect is created.

[0020] 2. The present invention proposes a levee structure for protecting ancient trees. Under the condition of fully protecting ancient trees, it ensures the flood discharge function of the existing river channel, reduces the burial depth of existing ancient trees as much as possible, ensures their survival rate, and at the same time combines technologies such as the hydrophilic function of the levee, ecological environmental protection, and night light show to create a modern and happy river channel and increase the living comfort of citizens. The structure of the present invention is ecologically friendly, has a good hydrophilic landscape effect, and optimizes the project investment and operation management and maintenance costs. Description of the Drawings

[0021] Figure 1 is the structural diagram of the present invention;

[0022] Figure 2 is Figure 1 the A-A sectional view of

[0023] In the figure: 1 - Ancient tree protection section; 2 - Connection section; 3 - Standard section dike; 11 - Lower retaining wall of the protection section; 12 - Slope protection of the protection section; 13 - Upper retaining wall of the protection section; 14 - Road surface structure of the protection section; 15 - Foundation of the protection section; 16 - Ancient tree; 17 - Landscape lamp; 111 - Scour-preventing front toe of the protection section; 112 - Bottom slab of the protection section; 113 - Reserved hole of the protection section; 114 - Protection cylinder of the protection section; 115 - Drainage hole of the protection section; 116 - Protection wall of the protection section; 131 - Main body of the upper retaining wall of the protection section; 132 - Upper cantilever of the protection section; 133 - Cantilever column of the protection section; 134 - Guardrail of the protection section; 21 - Lower retaining wall of the connection section; 22 - Slope protection of the connection section; 23 - Upper retaining wall of the connection section; 24 - Road surface structure of the connection section; 25 - Foundation of the connection section; 211 - Scour-preventing front toe of the connection section; 212 - Bottom slab of the connection section; 213 - Protection wall of the connection section; 231 - Main body of the upper retaining wall of the connection section; 232 - Upper cantilever of the connection section; 233 - Guardrail of the connection section; 31 - Lower retaining wall of the standard section; 32 - Slope protection of the standard section; 33 - Upper retaining wall of the standard section; 34 - Road surface structure of the standard section; 35 - Foundation of the standard section; 331 - Main body of the upper retaining wall of the standard section; 332 - Guardrail of the standard section. Detailed implementation manner

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] As Figures 1 to 2 shown, a dike structure for protecting ancient trees according to the present invention includes an ancient tree protection section 1, a connection section 2 and a standard section dike 3; the upstream side of the ancient tree protection section 1 is connected to the upstream side of the standard section dike 3 through the connection section 2, and the downstream side of the ancient tree protection section 1 is connected to the downstream side of the standard section dike 3 through the connection section 2.

[0026] The ancient tree protection section 1 includes a lower retaining wall 11 of the protection section, a slope protection 12 of the protection section, an upper retaining wall 13 of the protection section, a road surface structure 14 of the protection section, a foundation 15 of the protection section, an ancient tree 16 and a landscape lamp 17; the lower retaining wall 11 of the protection section is connected to the upper retaining wall 13 of the protection section through the slope protection 12 of the protection section, the road surface structure 14 of the protection section is arranged on the top surface of the foundation 15 of the protection section, one side of the road surface structure 14 of the protection section is connected to the upper retaining wall 13 of the protection section, the foundation 15 of the protection section is respectively connected to the bottoms of the lower retaining wall 11 of the protection section, the slope protection 12 of the protection section, the upper retaining wall 13 of the protection section and the ancient tree 16, and the landscape lamp 17 is connected to the upper part of the ancient tree 16.

[0027] The connection section 2 includes a lower retaining wall 21 of the connection section, a slope protection 22 of the connection section, an upper retaining wall 23 of the connection section, a pavement structure 24 of the connection section, and a foundation 25 of the connection section; the lower retaining wall 21 of the connection section is connected to the upper retaining wall 23 of the connection section through the slope protection 22 of the connection section, the pavement structure 24 of the connection section is arranged on the top surface of the foundation 25 of the connection section, one side of the pavement structure 24 of the connection section is connected to the upper retaining wall 23 of the connection section, and the foundation 25 of the connection section is respectively connected to the lower retaining wall 21 of the connection section, the slope protection 22 of the connection section, and the upper retaining wall 23 of the connection section.

[0028] The standard section of the dike 3 includes a lower retaining wall 31 of the standard section, a slope protection 32 of the standard section, an upper retaining wall 33 of the standard section, a pavement structure 34 of the standard section, and a foundation 35 of the standard section; the lower retaining wall 31 of the standard section is connected to the upper retaining wall 33 of the standard section through the slope protection 32 of the standard section, the pavement structure 34 of the standard section is arranged on the top surface of the foundation 35 of the standard section, one side of the pavement structure 34 of the standard section is connected to the upper retaining wall 33 of the standard section, and the foundation 35 of the standard section is respectively connected to the lower retaining wall 31 of the standard section, the slope protection 32 of the standard section, and the upper retaining wall 33 of the standard section.

[0029] The lower retaining wall 11 of the protection section is connected to the lower retaining wall 31 of the standard section through the lower retaining wall 21 of the connection section, the slope protection 12 of the protection section is connected to the slope protection 32 of the standard section through the slope protection 22 of the connection section, the upper retaining wall 13 of the protection section is connected to the upper retaining wall 33 of the standard section through the upper retaining wall 23 of the connection section, the pavement structure 14 of the protection section is connected to the pavement structure 34 of the standard section through the pavement structure 24 of the connection section, and the foundation 15 of the protection section is connected to the foundation 35 of the standard section through the foundation 25 of the connection section.

[0030] The lower retaining wall 11 of the protection section adopts a lightweight C30 reinforced concrete structure, the slope protection 12 of the protection section adopts an ecological three-dimensional grid slope protection, the upper retaining wall 13 of the protection section adopts a reinforced concrete cantilever retaining wall structure, the pavement structure 14 of the protection section adopts an asphalt pavement structure, and the landscape lamp 17 adopts an LED night lamp.

[0031] The lower retaining wall 21 of the connection section adopts a lightweight C30 reinforced concrete structure, the slope protection 22 of the connection section adopts an ecological three-dimensional grid slope protection, the upper retaining wall 23 of the connection section also adopts a reinforced concrete cantilever retaining wall structure, and the remaining corresponding structures are coordinated and unified with the protection section.

[0032] The lower retaining wall 11 of the protection section includes an anti-scour front toe 111 of the protection section, a bottom slab 112 of the protection section, a reserved hole 113 of the protection section, a protection cylinder 114 of the protection section, a drainage hole 115 of the protection section, and a protection wall 116 of the protection section; the top surface of the anti-scour front toe 111 of the protection section is connected to the bottom slab 112 of the protection section, the reserved hole 113 of the protection section is arranged in the middle of the bottom slab 112 of the protection section, the protection cylinder 114 of the protection section is connected to the inner wall of the cavity of the reserved hole 113 of the protection section, the drainage hole 115 of the protection section is arranged inside the bottom slab 112 of the protection section, one end of the drainage hole 115 of the protection section is connected to the reserved hole 113 of the protection section and the protection cylinder 114 of the protection section, and the bottom of the protection wall 116 of the protection section is connected to the bottom slab 112 of the protection section; the ancient tree 16 is arranged inside the reserved hole 113 of the protection section and the protection cylinder 114 of the protection section at the same time.

[0033] The upper retaining wall 13 of the protection section includes a main body 131 of the upper retaining wall of the protection section, an upper cantilever 132 of the protection section, a cantilever column 133 of the protection section, and a guardrail 134 of the protection section; the top surface of the main body 131 of the upper retaining wall of the protection section is connected to the upper cantilever 132 of the protection section, the top surface of the cantilever column 133 of the protection section is connected to the bottom surface of the upper cantilever 132 of the protection section, and the guardrail 134 of the protection section is arranged on the outer side of the top surface of the upper cantilever 132 of the protection section; the cantilever column 133 of the protection section is arranged on the top surface of the lower retaining wall 11 of the protection section, and the cantilever column 133 of the protection section is arranged on the top surface of the protection wall 116 of the protection section.

[0034] The inner diameter of the reserved hole 113 of the protection section is slightly larger than the trunk of the ancient tree 16, and it adopts a steel casing structure. The drainage hole 115 of the protection section adopts a D10cm PVC drainage pipe.

[0035] The lower retaining wall 21 of the connection section includes an anti-scour front toe 211 of the connection section, a bottom slab 212 of the connection section, and a protection wall 213 of the connection section; the anti-scour front toe 211 of the connection section is connected to the bottom surface of the bottom slab 212 of the connection section, and the protection wall 213 of the connection section is arranged on the top surface of the bottom slab 212 of the connection section.

[0036] The upper retaining wall 23 of the connection section includes a main body 231 of the upper retaining wall of the connection section, an upper cantilever 232 of the connection section, and a guardrail 233 of the connection section; the top surface of the main body 231 of the upper retaining wall of the connection section is connected to the upper cantilever 232 of the connection section, and the guardrail 233 of the connection section is arranged on the outer side of the top surface of the upper cantilever 232 of the connection section.

[0037] The upper retaining wall 33 of the standard section includes a main body 331 of the upper retaining wall of the standard section and a guardrail 332 of the standard section; the guardrail 332 of the standard section is arranged on the outer side of the top surface of the main body 331 of the upper retaining wall of the standard section.

[0038] The anti-scour front toe 111 of the protection section is connected to the anti-scour front toe 211 of the connection section, the bottom slab 112 of the protection section is connected to the bottom slab 212 of the connection section, the protection wall 116 of the protection section is connected to the lower retaining wall 31 of the standard section through the protection wall 213 of the connection section, and the bottom slab 212 of the connection section is connected to the bottom of the lower retaining wall 31 of the standard section.

[0039] The main body 131 of the upper retaining wall of the protection section is connected to the main body 331 of the upper retaining wall of the standard section through the main body 231 of the upper retaining wall of the connection section, and the upper cantilever 232 of the connection section is connected to the upper cantilever 132 of the protection section.

[0040] There are more than two ancient tree protection sections 1, connection sections 2, and standard section dikes 3.

[0041] The above embodiments have described the present invention in conjunction with the accompanying drawings, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A dike structure for protecting ancient trees, characterized in that: It includes an ancient tree protection section (1), a connection section (2) and a standard section dike (3); the upstream side of the ancient tree protection section (1) is connected to the upstream side of the standard section dike (3) through the connection section (2), and the downstream side of the ancient tree protection section (1) is connected to the downstream side of the standard section dike (3) through the connection section (2). The ancient tree protection section (1) includes a lower retaining wall of the protection section (11), a slope protection of the protection section (12), an upper retaining wall of the protection section (13), a road surface structure of the protection section (14), a foundation of the protection section (15), ancient trees (16) and landscape lights (17); the lower retaining wall of the protection section (11) is connected to the upper retaining wall of the protection section (13) through the slope protection of the protection section (12), the road surface structure of the protection section (14) is arranged on the top surface of the foundation of the protection section (15), one side of the road surface structure of the protection section (14) is connected to the upper retaining wall of the protection section (13), the foundation of the protection section (15) is respectively connected to the bottom of the lower retaining wall of the protection section (11), the slope protection of the protection section (12), the upper retaining wall of the protection section (13) and the ancient trees (16), and the landscape lights (17) are connected to the upper part of the ancient trees (16). The connection section (2) includes a lower retaining wall of the connection section (21), a slope protection of the connection section (22), an upper retaining wall of the connection section (23), a road surface structure of the connection section (24) and a foundation of the connection section (25); the lower retaining wall of the connection section (21) is connected to the upper retaining wall of the connection section (23) through the slope protection of the connection section (22), the road surface structure of the connection section (24) is arranged on the top surface of the foundation of the connection section (25), one side of the road surface structure of the connection section (24) is connected to the upper retaining wall of the connection section (23), and the foundation of the connection section (25) is respectively connected to the lower retaining wall of the connection section (21), the slope protection of the connection section (22) and the upper retaining wall of the connection section (23). The standard section dike (3) includes a lower retaining wall of the standard section (31), a slope protection of the standard section (32), an upper retaining wall of the standard section (33), a road surface structure of the standard section (34) and a foundation of the standard section (35); the lower retaining wall of the standard section (31) is connected to the upper retaining wall of the standard section (33) through the slope protection of the standard section (32), the road surface structure of the standard section (34) is arranged on the top surface of the foundation of the standard section (35), one side of the road surface structure of the standard section (34) is connected to the upper retaining wall of the standard section (33), and the foundation of the standard section (35) is respectively connected to the lower retaining wall of the standard section (31), the slope protection of the standard section (32) and the upper retaining wall of the standard section (33). The lower retaining wall of the protection section (11) is connected to the lower retaining wall of the standard section (31) through the lower retaining wall of the connection section (21), the slope protection of the protection section (12) is connected to the slope protection of the standard section (32) through the slope protection of the connection section (22), the upper retaining wall of the protection section (13) is connected to the upper retaining wall of the standard section (33) through the upper retaining wall of the connection section (23), the road surface structure of the protection section (14) is connected to the road surface structure of the standard section (34) through the road surface structure of the connection section (24), and the foundation of the protection section (15) is connected to the foundation of the standard section (35) through the foundation of the connection section (25). The lower retaining wall (11) of the protection section includes a scour-preventing front toe (111) of the protection section, a bottom slab (112) of the protection section, a reserved hole (113) of the protection section, a protection cylinder (114) of the protection section, a drainage hole (115) of the protection section, and a protection wall (116) of the protection section; the top surface of the scour-preventing front toe (111) of the protection section is connected to the bottom slab (112) of the protection section, the reserved hole (113) of the protection section is arranged in the middle of the bottom slab (112) of the protection section, the protection cylinder (114) of the protection section is connected to the inner wall of the cavity of the reserved hole (113) of the protection section, the drainage hole (115) of the protection section is arranged inside the bottom slab (112) of the protection section, one end of the drainage hole (115) of the protection section is connected to the reserved hole (113) of the protection section and the protection cylinder (114) of the protection section, and the bottom of the protection wall (116) of the protection section is connected to the bottom slab (112) of the protection section; the ancient tree (16) is arranged inside the reserved hole (113) of the protection section and the protection cylinder (114) of the protection section at the same time; The upper retaining wall (13) of the protection section includes a main body (131) of the upper retaining wall of the protection section, an upper platform (132) of the protection section, a platform column (133) of the protection section, and a guardrail (134) of the protection section; the top surface of the main body (131) of the upper retaining wall of the protection section is connected to the upper platform (132) of the protection section, the top surface of the platform column (133) of the protection section is connected to the bottom surface of the upper platform (132) of the protection section, and the guardrail (134) of the protection section is arranged on the outer side of the top surface of the upper platform (132) of the protection section; the platform column (133) of the protection section is arranged on the top surface of the lower retaining wall (11) of the protection section, and the platform column (133) of the protection section is arranged on the top surface of the protection wall (116) of the protection section; There are two or more of the ancient tree protection sections (1), connection sections (2), and standard section levees (3).

2. The levee structure for protecting ancient trees according to claim 1, characterized in that: The lower retaining wall (21) of the connection section includes a scour-preventing front toe (211) of the connection section, a bottom slab (212) of the connection section, and a protection wall (213) of the connection section; the scour-preventing front toe (211) of the connection section is connected to the bottom surface of the bottom slab (212) of the connection section, and the protection wall (213) of the connection section is arranged on the top surface of the bottom slab (212) of the connection section; The upper retaining wall (23) of the connection section includes a main body (231) of the upper retaining wall of the connection section, an upper platform (232) of the connection section, and a guardrail (233) of the connection section; the top surface of the main body (231) of the upper retaining wall of the connection section is connected to the upper platform (232) of the connection section, and the guardrail (233) of the connection section is arranged on the outer side of the top surface of the upper platform (232) of the connection section; The upper retaining wall (33) of the standard section includes a main body (331) of the upper retaining wall of the standard section and a guardrail (332) of the standard section; the guardrail (332) of the standard section is arranged on the outer side of the top surface of the main body (331) of the upper retaining wall of the standard section; The anti-scour front toe (111) of the protection section is connected to the anti-scour front toe (211) of the connection section, the bottom slab (112) of the protection section is connected to the bottom slab (212) of the connection section, the protection wall (116) of the protection section is connected to the lower retaining wall (31) of the standard section through the protection wall (213) of the connection section, and the bottom slab (212) of the connection section is connected to the bottom of the lower retaining wall (31) of the standard section; The upper retaining wall main body (131) of the protection section is connected to the upper retaining wall main body (331) of the standard section through the upper retaining wall main body (231) of the connection section, and the upper cantilever (232) of the connection section is connected to the upper cantilever (132) of the protection section.

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