Repair structure for treating slight inclination deformation of gravity type concrete retaining wall body
By setting up a restoration structure of reaction seats, jacks, earth-rock reinforcement bodies and additional base plates on the concrete retaining wall, the problem of slight inclination deformation caused by foundation soil disturbance is solved, deformation repair and reinforcement is achieved, and the retaining wall is ensured to have good stability in subsequent use.
Patent Information
- Application Number
- CN202420972164.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The prior art is difficult to effectively repair the slight inclined deformation of concrete retaining walls due to disturbances in foundation soil. Especially when the soil is thick, it is impossible to repair both deformation and avoid the occurrence of later deformation.
The restoration structure is adopted including reaction seats, horizontal jacks, earth and stone reinforcement bodies and additional base plates. The wall deformation is gradually repaired through the jack, the displacement meter monitors the reset process, the earth and stone reinforcement bodies improve the foundation bearing capacity, and the additional base plate provides favorable bending moment to prevent later deformation.
The deformation repair and reinforcement of the retaining wall is realized to ensure that the retaining wall avoids deforming again in subsequent use, which not only repairs existing deformations but also enhances the stability of the retaining wall.
Smart Images
Figure CN222614331U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of civil engineering structures, and in particular relates to a repair structure for processing slight inclination and deformation of a gravity concrete retaining wall. Background Art
[0002] Concrete retaining walls are widely used in engineering because of their high strength, good durability and resistance to deformation. In addition, concrete retaining walls have good stability and good earthquake and wind resistance.
[0003] The stability of the retaining wall is greatly affected by the stability of the soil at the bottom of the wall. Because the retaining wall does not require high bearing capacity of the foundation soil, the retaining wall foundation is generally shallow, and the stability of the foundation soil is easily affected by the surrounding excavation construction. In actual projects, the location of the retaining wall is often accompanied by the excavation of drainage ditches and cable trenches. If the excavation construction sequence or operation process is improper, or even the pressure of construction machinery on the backfill surface of the wall exceeds the design requirements, it is easy to make the foundation soil at the toe of the wall loose under the disturbance, and the bearing capacity is reduced, thereby causing the retaining wall to tilt and deform.
[0004] At present, when a retaining wall is slightly deformed, it can only be reinforced by anchor rods, micro piles and adding supporting walls. Anchor rod reinforcement and micro pile reinforcement have requirements on the anchoring length of anchor rods and micro piles into the rock mass, which is not suitable for thick backfill areas. Adding supporting wall reinforcement can prevent the expansion and recurrence of retaining wall deformation, but it cannot repair existing deformation, and it is not suitable for projects with certain requirements on the appearance of retaining walls. Therefore, it is of great significance to develop a repair structure suitable for thick backfill and capable of repairing existing deformation of retaining walls. Utility Model Content
[0005] The utility model aims to provide a repair structure for solving the problem that the concrete retaining wall body is tilted and deformed due to the disturbance of foundation soil, so as to solve the problem that the existing treatment method has a limited application range and cannot repair the existing deformation.
[0006] A repair structure for handling slight tilt and deformation of a gravity concrete retaining wall, which is arranged at a tilted retaining wall, is characterized in that it includes a reaction seat, a horizontal jack, an earth-rock reinforcement body and an additional base plate, a vertical reaction seat is arranged in front of the retaining wall, the height of the reaction seat is not lower than the retaining wall, a vertical support is fixed on the side of the reaction seat close to the retaining wall, and the support is connected to the horizontally arranged jack base, a pad is arranged on the head of the jack and supports the upper part of the retaining wall; a displacement meter is installed on the top of the retaining wall; the front side of the retaining wall is excavated to the top elevation of the retaining wall foundation, and crushed stones are pressed in until they are flush with the bottom surface to form an earth-rock reinforcement body, a layer of concrete cushion is poured at the heel of the rear wall of the retaining wall, an additional base plate is arranged above the cushion layer, and the additional base plate is a steel-concrete structure; soil is backfilled on the base plate until it is flush with the top surface of the retaining wall to form a covering layer.
[0007] Furthermore, the additional bottom plate width is 0.35 to 0.45 times the height of the retaining wall.
[0008] Furthermore, the thickness of the connection between the bottom plate and the retaining wall is 0.25m~0.6m, and the thickness of the end of the bottom plate away from the retaining wall is 0.2m~0.25m.
[0009] Furthermore, the reaction seat is formed by stacking static load test concrete counterweight blocks.
[0010] The beneficial effects of the utility model are as follows: the setting of the jack can repair the deformation of the retaining wall, and the displacement meter can accurately monitor the resetting process of the retaining wall. The additional base plate can ensure that the retaining wall does not deform again during subsequent use. The favorable bending moment provided by the deadweight load of the backfill of the wall can be used to assist the retaining wall in maintaining the reset state after the retaining wall is reset, and also prevent the retaining wall from being deformed later, thereby achieving the purpose of deformation repair and reinforcement. The soil and stone reinforcement body at the toe of the wall is a compaction repair treatment for the existing loose soil, eliminating the direct cause of the deformation of the retaining wall and preventing the deformation from expanding. In general, it can not only repair the existing deformation of the retaining wall, but also prevent the occurrence of later deformation. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The figure is a schematic diagram of a repair structure for dealing with slight tilt and deformation of a gravity concrete retaining wall.
[0012] Among them: 1-retaining wall; 2-reaction seat; 3-jack; 4-support; 5-pad; 6-displacement meter; 7-soil and rock reinforcement body; 8-cushion; 9-additional bottom plate; 10-backfill and covering soil. DETAILED DESCRIPTION
[0013] Embodiment 1: A repair structure for treating slight tilt and deformation of a gravity concrete retaining wall, used for repairing a retaining wall 1 with slight deformation, comprising a reaction seat 2, a jack 3, an earth-rock reinforcement body 7 and an additional base plate 9.
[0014] First, the backfill behind the retaining wall 1 is removed as a whole to ensure that the lateral pressure of the soil is completely unloaded, leaving space for the resetting of the retaining wall 1. The excavation width is determined in combination with the height of the retaining wall and the width of the additional base plate 9. Attention should be paid to the soil excavation depth to the base top of the retaining wall 1 to avoid disturbing the foundation and weakening the bearing capacity of the foundation. The soil excavation process should ensure that the wall body of the retaining wall 1 and the foundation soil under the retaining wall are not disturbed. The backfill of the wall is taken out to the base top of the retaining wall, and the last 300mm thick backfill is taken manually. After the backfill is taken out, the external force that causes the tilt of the retaining wall is unloaded, leaving a working surface for subsequent repair and reinforcement.
[0015] A vertical reaction seat 2 is set in front of the retaining wall 1. The reaction seat 2 is set by laying concrete counterweight blocks for pile foundation static load test. The height of the reaction seat 2 is not lower than the retaining wall 1. The reaction seat 2 is pre-drilled on the side facing the retaining wall, and a vertical support 4 is fixedly installed through the drilling, and a horizontal jack 3 is fixedly installed on the support 4. A pad 5 is set on the head of the jack 3 and supports the upper part of the retaining wall 1. The jack 3 acts on the wall surface to gradually repair the deformation of the wall. A displacement meter 6 is set on the top of the retaining wall 1 to monitor the reset deformation of the retaining wall and monitor the deformation of the retaining wall in subsequent use.
[0016] After the retaining wall 1 is restored, the lifting state of the jack 3 is maintained, and the loose soil in front of the toe of the retaining wall 1 is excavated and removed, and the excavation is carried out to the top elevation of the foundation of the retaining wall 1. Then, the soil is improved by pressing crushed stones until it is flush with the original ground, forming a soil-rock reinforcement body 7 with improved density and bearing capacity, meeting the requirements of the toe of the retaining wall 1 for the bearing capacity of the foundation, and eliminating the direct cause of the outward deformation of the retaining wall 1.
[0017] A layer of plain concrete cushion 8 is first poured on the back side of the heel of the retaining wall 1. An additional bottom plate 9 is added on the cushion 8 by first planting reinforcement and then pouring concrete. The planting depth is determined in combination with the diameter of the reinforcement to ensure that the pull-out test is qualified. The width of the additional bottom plate 9 is determined based on the height of the retaining wall 1, the uniformly distributed load on the back of the wall, the fortification intensity, and the atlas of the retaining wall 1. The width of the additional bottom plate 9 is 0.35~0.45 times the height of the retaining wall 1. According to the height of the retaining wall, the thickness of the additional bottom plate 9 at the connection with the retaining wall 1 is 0.25m~0.6m, and the thickness of the additional bottom plate 9 at the end away from the retaining wall 1 is 0.2m~0.25m. The additional reinforcement is configured according to the minimum reinforcement ratio of the bottom plate of 0.15%, and the thickness is based on the connection between the bottom plate and the wall body.
[0018] Backfill soil is backfilled on the additional bottom plate 9 until it is flush with the top surface of the retaining wall to form a covering layer 10, and the favorable bending moment formed by the deadweight load of the backfill acting on the bottom plate is used as a resistance to prevent the retaining wall 1 from deforming again in the later period.
Claims
1. A repair structure for treating slight tilt and deformation of a gravity concrete retaining wall, which is arranged at the inclined retaining wall and is characterized by: It includes a reaction seat, a horizontal jack, an earth-rock reinforcement body and an additional bottom plate. A vertical reaction seat is arranged in front of the retaining wall. The height of the reaction seat is not lower than the retaining wall. A vertical support is fixed on the side of the reaction seat close to the retaining wall. The support is connected to the horizontally arranged jack base. A pad is arranged on the head of the jack and supports the upper part of the retaining wall. A displacement meter is installed on the top of the retaining wall. The front side of the retaining wall is excavated to the top elevation of the retaining wall foundation, and crushed stones are pressed in to be flush with the bottom surface to form an earth-rock reinforcement body. A layer of concrete cushion is poured at the heel of the rear wall of the retaining wall, and an additional bottom plate is arranged above the cushion layer. The additional bottom plate is a steel-concrete structure. The soil is backfilled on the bottom plate to be flush with the top surface of the retaining wall to form a covering layer.
2. A repair structure for treating slight tilt and deformation of a gravity concrete retaining wall as claimed in claim 1, characterized in that The additional bottom plate width is 0.35 to 0.45 times the height of the retaining wall.
3. A repair structure for treating slight tilt and deformation of a gravity concrete retaining wall as claimed in claim 1, characterized in that The thickness of the connection between the bottom plate and the retaining wall is 0.25m~0.6m, and the thickness of the end of the bottom plate away from the retaining wall is 0.2m~0.25m.
4. A repair structure for treating slight tilt and deformation of a gravity concrete retaining wall as claimed in claim 1, characterized in that The reaction seat is formed by stacking static load test concrete counterweight blocks.