A retaining wall for a water conservancy project and its construction method

Abstract

The present invention relates to a retaining wall for a water conservancy project and its construction method, aiming at the technical problems of insufficient compaction of asphalt filling in the vertical expansion joints of the retaining wall, resulting in a decrease in the connection strength of the retaining wall units. It includes a ground base layer, a soil layer, precast retaining wall unit blocks, assembly blocks, a biting mechanism and auxiliary baffles; the ground base layer; the soil layer is arranged on one side of the ground base layer, and the precast retaining wall unit blocks are arranged on the ground base layer to connect the soil layer. Among them, the gaps between two adjacent precast retaining wall unit blocks form an installation cavity, the assembly blocks are arranged inside the installation cavity, and the biting mechanism is arranged on one side of the assembly block to connect to the installation cavity. The present invention squeezes the extruded asphalt filling material through the expansion of the biting mechanism, so that the asphalt filling material is quickly and evenly filled in the filling cavity, resulting in relatively uniform filling of asphalt filler in the filling cavity, and improving the firmness of the connection between two adjacent precast retaining wall unit blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of retaining walls, and particularly to a retaining wall for a water conservancy project and a construction method thereof. Background Technique

[0002] A water conservancy project is a project built for controlling and allocating surface water and groundwater in nature to achieve the purpose of eliminating disasters and bringing benefits. The gravity retaining wall is one of the methods. A gravity retaining wall refers to a retaining wall that relies on its own weight to resist the lateral pressure of the soil. The gravity retaining wall can be built with stone masonry or concrete and is generally made into a simple trapezoid. Its advantages are local material utilization, convenient construction, and good economic effect. Therefore, the gravity retaining wall is widely used in projects such as railways, highways, water conservancy, harbors, and mines in our country. For the setting of the retaining wall for the slope protection of a water conservancy river channel, it is usually constructed by segmental skip-jump construction, dividing the concrete retaining wall into discontinuous individuals. Existing retaining walls are mostly made of cast-in-place cement or precast cement boards, and 3 - 5 cm vertical expansion joints are provided at the installation joints to adapt to the shrinkage of the retaining wall and temperature changes, reducing the rupture of the retaining wall and the difference in foundation pressure.

[0003] For the existing retaining wall, after the overall construction treatment of the retaining wall, asphalt is filled in the expansion joint to connect the two retaining wall units. First, the existing retaining wall has horizontal and vertical plane distances. In actual operation, when filling asphalt into the 3 - 5 cm vertical expansion joint, it is easy to cause the asphalt to be filled incompactly, resulting in local hollowing, reducing the connection strength between the two retaining wall units, and easily causing deformation and displacement. The soil foundation exerts an increased force on the deformed parts of the two retaining wall units, causing damage to the retaining wall over a long time. Therefore, it is particularly important to propose a retaining wall for a water conservancy project with high connection strength. In view of this, we propose a retaining wall for a water conservancy project and a construction method thereof. Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art, meet the actual needs, and provide a retaining wall for water conservancy projects and its construction method, so as to solve the technical problem of the loose filling of asphalt in the vertical expansion joints of the retaining wall, resulting in a decrease in the connection strength of the retaining wall units. To achieve the object of the present invention, the technical solution adopted by the present invention is as follows: Design a retaining wall for water conservancy projects, including a ground base layer, a soil layer, precast retaining wall unit blocks, assembly blocks, a biting mechanism, and auxiliary baffles; the ground base layer; the soil layer is arranged on one side of the ground base layer, and the precast retaining wall unit blocks are arranged on the ground base layer to connect the soil layer. Among them, the gaps between two adjacent precast retaining wall unit blocks form an installation cavity, the assembly blocks are arranged inside the installation cavity, and the biting mechanism is arranged on one side of the assembly block to connect to the installation cavity. Among them, the biting mechanism is a hydraulic expansion structure, and two auxiliary baffles are symmetrically arranged on both sides of the installation cavity. Among them, the gaps between the auxiliary baffles, the biting mechanism, and the assembly blocks enclose a filling cavity. Among them, an asphalt filling material is arranged in the filling cavity. Among them, the biting mechanism squeezes the asphalt filling material, causing the asphalt filling material to closely fit the filling cavity. The present invention generates extrusion on the asphalt filling material by the expansion of the biting mechanism, so that the asphalt filling material is quickly and evenly filled in the filling cavity, resulting in a relatively uniform filling of asphalt filler in the filling cavity, and improving the connection firmness between two adjacent precast retaining wall unit blocks.

[0005] Preferably, the precast retaining wall unit blocks are arranged in an inclined structure at the connection fold angle of the soil layer and the ground base layer. The precast retaining wall unit blocks of the present invention are preferably arranged in vertical columns and horizontal rows. By the inclined setting, the overall center of gravity of the retaining wall is shifted closer to the soil layer, thereby increasing the stress on the soil retaining, and at the same time facilitating the filling of the liquid inside the horizontal row biting mechanism and reducing the situation of overflow and dripping.

[0006] Preferably, the two concave sides of the assembly block are wavy. The present invention uses the wavy assembly block to increase the contact area with the asphalt filling material, and helps to improve the connection firmness between two adjacent precast retaining wall unit blocks.

[0007] Furthermore, the biting mechanism includes: a mounting substrate, a hollow prefabricated expansion block, a pressing block and a sealing block; the mounting substrate is arranged on one side of the mounting cavity through bolts, the hollow prefabricated expansion block is fixed on one side of the mounting substrate, the pressing block is arranged at the end of the hollow prefabricated expansion block through bolts and extends into the hollow prefabricated expansion block. Among them, the inner wall of the hollow prefabricated expansion block is closely attached to the outer wall of the pressing block, and the sealing block is fixed on the pressing block. Among them, the gap between the hollow prefabricated expansion block and the pressing block forms an expansion cavity, and the expansion cavity is filled with extrusion liquid. In the present invention, the pressing block and the hollow prefabricated expansion block can be connected through bolts, and the bolts are used to compress the extrusion liquid in the hollow prefabricated expansion block, causing the overall expansion of the hollow prefabricated expansion block. Moreover, the entire expansion cavity is made of metal, the middle end is made of metal iron sheet, and connecting frames are provided at both ends, so that the expansion cavity is in a state of being small at both ends and large in the middle, which is convenient for the expansion cavity to perform the expansion work.

[0008] Preferably, the hollow prefabricated expansion block is provided with a number of hollow protrusions arranged in a fishbone pattern, and the hollow protrusions cooperate with the assembly blocks. In the present invention, through the arrangement of a number of hollow protrusions arranged in a fishbone pattern and the assembly blocks with wavy inner concave sides on both sides, when the prefabricated retaining wall unit blocks are under the action of the stress of the soil layer pushing outward, they can be engaged with each other, improving the connection stability of two adjacent prefabricated retaining wall unit blocks, forming a protective effect, and improving the safety of the retaining wall.

[0009] Preferably, the auxiliary baffle is composed of a deformation block, an extension block and a clamping block; among them, the deformation block is in an "S" shape. In the present invention, the overall auxiliary baffle can undergo axial deformation due to the thermal expansion and contraction of the prefabricated retaining wall unit block itself and lateral deformation under the stress of the soil layer pushing outward through the "S"-shaped deformation block, meeting the requirements of multi-directional deformation. At the same time, through the installation of the auxiliary baffle, the installation cavity can form a filling cavity, preventing the asphalt filling material from overflowing from the gaps between two adjacent prefabricated retaining wall unit blocks.

[0010] A construction method for a retaining wall in a water conservancy project includes the following steps:

[0011] S100: Excavation treatment; Use an excavator to dig inclined installation channels on both sides of the water conservancy project river channel;

[0012] S200: Laying treatment; Use a crane to sequentially place the prefabricated retaining wall unit blocks;

[0013] S300: Filling cavity formation treatment; Manually snap two auxiliary baffles symmetrically into the prefabricated retaining wall unit blocks and the assembly blocks;

[0014] S400: Filling treatment; Use a machine to pour asphalt mixture into the filling cavity;

[0015] S500: Expansion treatment; loosen the pressing block with a wrench, manually fill the inside of the hollow prefabricated expansion block with extrusion liquid, then tighten the bolt to make the pressing block penetrate into the hollow prefabricated expansion block, and then manually cover the top of the filling cavity with a pressing plate. The middle part of the hollow prefabricated expansion block expands to extrude and fill the asphalt mixture, and the asphalt filler fits tightly with the filling cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, the expansion of the biting mechanism is used to extrude the extruded asphalt filler, so that the asphalt filler is quickly and evenly distributed in the filling cavity, resulting in relatively uniform filling of the asphalt filler in the filling cavity, and improving the firmness of the connection between two adjacent precast retaining wall unit blocks.

[0018] 2. The precast retaining wall unit block of the present invention is preferably provided with vertical columns and horizontal columns. By the inclined setting, the overall center of gravity of the retaining wall shifts close to the soil layer, thereby increasing the stress on the retaining soil, and at the same time facilitating the filling of the liquid inside the horizontal column biting mechanism and reducing the situation of overflow and dripping.

[0019] 3. In the present invention, the pressing block and the hollow prefabricated expansion block can be connected by bolts. The bolts are used to compress the extrusion liquid in the hollow prefabricated expansion block, causing the overall expansion of the hollow prefabricated expansion block. The expansion cavity is made of metal as a whole, the middle part is made of metal iron sheet, and connecting frames are provided at both ends, so that the expansion cavity is in a state of being small at both ends and large in the middle, which is convenient for the expansion work of the expansion cavity.

[0020] 4. In the present invention, a number of hollow protrusions arranged in a fishbone shape and assembly blocks with wavy inner concave sides on both sides are provided, so that the precast retaining wall unit blocks can be mutually engaged under the action of the stress of the soil layer pushing outward, improving the connection stability of two adjacent precast retaining wall unit blocks, forming a protective effect, and improving the safety of the retaining wall.

[0021] 5. In the present invention, the auxiliary baffle can be deformed axially due to the thermal expansion and contraction of the precast retaining wall unit block itself and deformed transversely under the stress of the soil layer pushing outward through the "S"-shaped deformation block, meeting the requirements of multi-directional deformation. At the same time, the installation of the auxiliary baffle makes the installation cavity form a filling cavity, so that the asphalt filler cannot overflow from the gap between two adjacent precast retaining wall unit blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall three-dimensional schematic diagram of the present invention;

[0023] Figure 2 is the Figure 1 local enlarged structural schematic diagram of part A in the present invention;

[0024] Figure 3 Schematic side view structure of the present invention;

[0025] Figure 4 Exploded structure schematic diagram of the bite mechanism of the present invention;

[0026] Figure 5 Schematic installation structure diagram of the auxiliary baffle of the present invention.

[0027] In the figure: 1, subgrade layer; 2, soil layer; 3, precast retaining wall unit block; 4, assembly block; 5, bite mechanism; 6, auxiliary baffle; 501, installation substrate; 502, hollow precast expansion block; 503, pressing block; 504, sealing block. Embodiment

[0028] The present invention will be further described below in conjunction with the drawings and embodiments: Embodiment

[0029] A retaining wall for a water conservancy project, see Figures 1 to 5 , including a subgrade layer 1, a soil layer 2, a precast retaining wall unit block 3, an assembly block 4, a bite mechanism 5 and an auxiliary baffle 6; the subgrade layer 1; the soil layer 2 is arranged on one side of the subgrade layer 1, and the precast retaining wall unit block 3 is arranged on the subgrade layer 1 to connect the soil layer 2. Among them, the gap between two adjacent precast retaining wall unit blocks 3 forms an installation cavity, the assembly block 4 is arranged inside the installation cavity, and the bite mechanism 5 is arranged on one side of the assembly block 4 to connect to the installation cavity.

[0030] Among them, the bite mechanism 5 is a hydraulic expansion structure, and two auxiliary baffles 6 are symmetrically arranged on both sides of the installation cavity. The gaps between the auxiliary baffle 6, the bite mechanism 5 and the assembly block 4 enclose a filling cavity; an asphalt filling material is arranged in the filling cavity, and the bite mechanism 5 squeezes the asphalt filling material, causing the asphalt filling material to closely fit the filling cavity. The present invention generates extrusion on the extruded asphalt filling material by the expansion of the bite mechanism 5, so that the asphalt filling material is quickly evenly filled in the filling cavity, resulting in relatively uniform filling of the asphalt filler in the filling cavity, and improving the firmness of the connection between two adjacent precast retaining wall unit blocks 3.

[0031] The precast retaining wall unit block 3 is arranged in an inclined structure at the connection fold of the soil layer 2 and the subgrade layer 1. The precast retaining wall unit block 3 of the present invention is preferably provided with vertical and horizontal rows. By the inclined setting, the overall center of gravity of the retaining wall is shifted closer to the soil layer 2, thereby increasing the stress received by the retaining soil, and at the same time facilitating the filling of the liquid inside the horizontal row bite mechanism 5 and reducing the situation of overflow and dripping.

[0032] The two concave sides of the assembly block 4 are wavy. The present invention increases the contact area with the asphalt filling material through the wavy assembly block 4, and helps to improve the firmness of the connection between two adjacent precast retaining wall unit blocks 3.

[0033] The occlusion mechanism 5 includes: a mounting substrate 501, a hollow prefabricated expansion block 502, a pressing block 503, and a sealing block 504; the mounting substrate 501 is arranged on one side of the mounting cavity by bolts, the hollow prefabricated expansion block 502 is fixed on one side of the mounting substrate 501, and the pressing block 503 is arranged at the end of the hollow prefabricated expansion block 502 and extends into the hollow prefabricated expansion block 502 through bolts; wherein, the inner wall of the hollow prefabricated expansion block 502 is in close fit with the outer wall of the pressing block 503, the sealing block 504 is fixed on the pressing block 503, and the gap between the hollow prefabricated expansion block 502 and the pressing block 503 forms an expansion cavity, and the expansion cavity is filled with an extrusion liquid. In the present invention, the pressing block 503 and the hollow prefabricated expansion block 502 can be connected by bolts, and the pressing block 503 is used to compress the extrusion liquid in the hollow prefabricated expansion block 502 through the cooperation of the bolts, causing the overall expansion of the hollow prefabricated expansion block 502. Moreover, the entire expansion cavity is made of metal, the middle part is made of metal iron sheet, and connecting frames are provided at both ends, so that the expansion cavity is in a state of being small at both ends and large in the middle, which is convenient for the expansion work of the expansion cavity.

[0034] It should be noted that the hollow prefabricated expansion block 502 is provided with a number of hollow protrusions arranged in a fishbone pattern, and the hollow protrusions cooperate with the assembly block 4. In the present invention, through the arrangement of a number of hollow protrusions arranged in a fishbone pattern and the assembly block 4 with wavy inner concave sides on both sides, when the precast retaining wall unit block 3 is under the action of the outward pushing stress of the soil layer 2, they can be engaged with each other, improving the connection stability between two adjacent precast retaining wall unit blocks 3, forming a protective effect, and improving the safety of the retaining wall.

[0035] In addition, the auxiliary baffle 6 is composed of a deformation block, an extension block, and a clamping block; wherein, the deformation block is in an "S" shape. In the present invention, the overall auxiliary baffle 6 can undergo axial deformation due to the thermal expansion and contraction of the precast retaining wall unit block 3 itself and lateral deformation due to the outward pushing stress of the soil layer 2 through the "S"-shaped deformation block, meeting the requirements of multi-directional deformation. At the same time, through the installation of the auxiliary baffle 6, the installation cavity can form a filling cavity, preventing the asphalt filling material from overflowing from the gap between two adjacent precast retaining wall unit blocks 3. Embodiment

[0036] A construction method for a retaining wall in a water conservancy project includes the following steps:

[0037] S100: Excavation treatment; use an excavator to dig inclined installation channels on both sides of the water conservancy project river channel;

[0038] S200: Laying treatment; use a crane to sequentially place the precast retaining wall unit blocks 3;

[0039] S300: Filling cavity formation treatment; manually and symmetrically engage two auxiliary baffles 6 into the precast retaining wall unit block 3 and the assembly block 4;

[0040] S400: Filling process; Pour the asphalt mixture into the filling cavity by machine;

[0041] S500: Expansion process; Loosen the pressing block 503 with a wrench, manually fill the hollow prefabricated expansion block 502 with the extrusion liquid, then tighten the bolts to make the pressing block 503 penetrate into the hollow prefabricated expansion block 502, and then manually cover the top of the filling cavity with a pressing plate. The middle part of the hollow prefabricated expansion block 502 expands to extrude and fill the asphalt mixture, and the asphalt filler fits tightly with the filling cavity.

[0042] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A retaining wall for a water conservancy project, characterized in that, it includes: a ground base layer (1); a soil layer (2), arranged on one side of the ground base layer (1); precast retaining wall unit blocks (3), arranged on the ground base layer (1) to connect the soil layer (2), wherein, the gaps between two adjacent precast retaining wall unit blocks (3) form an installation cavity; a fitting block (4), arranged inside the installation cavity; a biting mechanism (5), arranged on one side of the fitting block (4) and connected to the installation cavity, wherein, the biting mechanism (5) is a hydraulic expansion structure; two auxiliary baffles (6), symmetrically arranged on both sides of the installation cavity; wherein, the gaps between the auxiliary baffle (6), the biting mechanism (5), and the fitting block (4) enclose a filling cavity, wherein, an asphalt filling material is provided in the filling cavity; wherein, the biting mechanism (5) extrudes the asphalt filling material, causing the asphalt filling material to closely fit the filling cavity; both concave sides of the fitting block (4) are wavy; the biting mechanism (5) includes: a mounting substrate (501), arranged on one side of the installation cavity by bolts; a hollow precast expansion block (502), fixed on one side of the mounting substrate (501); a pressing block (503), arranged at the end of the hollow precast expansion block (502) by bolts and extending into the hollow precast expansion block (502), wherein, the inner wall of the hollow precast expansion block (502) is in close contact with the outer wall of the pressing block (503); a sealing block (504), fixed on the pressing block (503), wherein, the gap between the hollow precast expansion block (502) and the pressing block (503) encloses an expansion cavity; wherein, the expansion cavity is filled with an extrusion liquid; the hollow precast expansion block (502) is provided with a number of hollow protrusions arranged in a fishbone pattern, and the hollow protrusions cooperate with the fitting block (4); the auxiliary baffle (6) is composed of a deformation block, an extension block, and a clamping block; wherein, the deformation block is in an "S" shape; and the whole expansion cavity is made of metal, the middle end is made of metal iron sheet, and connection frames are arranged at both ends, so that the expansion cavity is in a state of being small at both ends and large in the middle end.

2. A retaining wall for a water conservancy project according to claim 1, characterized in that, the precast retaining wall unit blocks (3) are arranged in an inclined structure at the connection fold of the soil layer (2) and the ground base layer (1).

3. A construction method for a retaining wall for a water conservancy project according to any one of claims 1-2, characterized in that, it includes the following steps: S100: Excavation treatment; Use an excavator to dig inclined installation channels on both sides of the water conservancy project river channel; S200: Laying treatment; Use a crane to sequentially place the precast retaining wall unit blocks (3); S300: Filling cavity formation treatment; Manually snap two auxiliary baffles (6) symmetrically into the precast retaining wall unit blocks (3) and the fitting block (4); S400: Filling treatment; Use a machine to pour asphalt mixture into the filling cavity; S500: Expansion treatment; loosen the pressing block (503) with a wrench, manually fill the inside of the hollow prefabricated expansion block (502) with extrusion liquid, then tighten the bolts to make the pressing block (503) penetrate into the hollow prefabricated expansion block (502), and then manually cover the top of the filling cavity with a pressing plate. The middle part of the hollow prefabricated expansion block (502) expands to extrude and fill the asphalt mixture, and the asphalt filler fits tightly with the filling cavity.

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