Protective device and retaining wall construction method

Abstract

The application discloses a protection device and a retaining wall construction method, and relates to the technical field of retaining walls. The protection device comprises a vertically arranged protection plate assembly, one side of the protection plate assembly is provided with a hydraulic telescopic support assembly extending obliquely downwards, and the lower portion of the protection plate assembly is connected with a vertically arranged supporting leg and a jack. When the jack is in a contracted state, the lower end of the jack is higher than the lower end of the supporting leg. The protection device is used for protecting the retaining wall foundation pit after excavation, avoiding collapse and deformation of the retaining wall foundation pit in the subsequent retaining wall construction process, guaranteeing the life safety of the retaining wall formwork pouring personnel, and the protection device can be jacked up along with the pouring of the retaining wall in the protection process, can be removed and reused after the construction of the retaining wall, and the construction cost is reduced.

Description

Technical Field

[0001] This application relates to the field of retaining wall technology, specifically to a protective device and a retaining wall construction method. Background Technology

[0002] Retaining walls are structures that support roadbed fill or hillside soil to prevent deformation and instability. When constructing retaining walls on mountain highways, the foundation pits for road cuts and shoulders, located on the earth's surface, are exposed to the atmosphere. Factors such as steep excavation slopes, poor drainage during construction, and a lack of temporary support measures make retaining walls prone to collapse and deformation. Sudden rockfalls, in particular, pose a significant safety hazard to workers inside the pits.

[0003] Currently, to improve the safety of workers operating inside the pit, a permanent protective structure is constructed first within the pit after the retaining wall foundation pit is excavated, followed by the construction of the retaining wall itself. This prevents collapse and deformation during subsequent retaining wall construction. However, the permanent protective structure cannot be reused and has a relatively high average cost. Summary of the Invention

[0004] The purpose of this application is to provide a protective device and a method for constructing retaining walls to solve the problem that permanent protective structures cannot be reused.

[0005] The technical solution adopted by this application to solve its technical problem is: a protective device, including a vertically arranged protective plate assembly, and a hydraulic telescopic support assembly extending obliquely downward is provided on one side of the protective plate assembly; a vertically arranged support leg and a jack are connected to the lower part of the protective plate assembly; when the jack is in a retracted state, the lower end of the jack is higher than the lower end of the support leg.

[0006] Furthermore, the lower end of the jack is connected to a vertically arranged anti-slip sleeve; when the jack is in the retracted state, the lower end of the anti-slip sleeve is higher than the lower end of the outrigger.

[0007] Furthermore, the protective plate assembly includes a vertically arranged support frame, on which a protective steel plate is disposed.

[0008] Furthermore, the protective steel plate is provided with transfer holes.

[0009] Furthermore, the hydraulic telescopic support assembly includes a first hydraulic support rod that is obliquely downward along a direction away from the protective plate assembly, and the first hydraulic support rod is connected to the protective plate assembly via a first connecting rod.

[0010] Furthermore, the hydraulic telescopic support assembly also includes a second hydraulic support rod; the first connecting rod is hinged to the protective plate assembly, and the two ends of the second hydraulic support rod are respectively hinged to the protective plate assembly and the first connecting rod.

[0011] Furthermore, the hydraulic telescopic support assembly also includes a third hydraulic support rod; the first hydraulic support rod is hinged to the first connecting rod, and the two ends of the third hydraulic support rod are respectively hinged to the protective plate assembly and the first hydraulic support rod.

[0012] Furthermore, the outrigger is a hollow tubular structure, and the outrigger has a vertically arranged opening on its wall facing the hydraulic telescopic support assembly. The jack is disposed in the inner cavity of the outrigger.

[0013] Furthermore, a crossbar is provided above the protective plate assembly, and the two ends of the crossbar are connected to the protective plate assembly through hydraulic lifting uprights. A first protective steel wire rope net is provided between the crossbar and the upper end of the protective plate assembly.

[0014] A method for constructing a retaining wall includes:

[0015] S1. Excavate the retaining wall foundation pit, transport the protective device to the retaining wall foundation pit, the outriggers support the retaining wall construction surface inside the retaining wall foundation pit, and the hydraulic telescopic support assembly presses the protective plate assembly against the side wall of the retaining wall foundation pit.

[0016] S2. Control the jack to be in the retracted state, and support the temporary support rod between the jack and the retaining wall construction surface; control the jack to lift the protective plate assembly, and at the same time control the hydraulic telescopic support assembly to extend;

[0017] S3. After the jack is lifted, a construction space is formed between the outrigger and the retaining wall construction surface. A section of retaining wall is constructed in the construction space. After the section of retaining wall solidifies, the top surface of the section of retaining wall forms a retaining wall construction surface for constructing the next section of retaining wall. Step S2 is repeated until all retaining walls are constructed.

[0018] The beneficial effects of this application are:

[0019] The protective device and retaining wall construction method provided in this application embodiment protect the excavated retaining wall foundation pit, preventing the foundation pit from collapsing and deforming during the subsequent retaining wall construction process, ensuring the safety of the personnel involved in the formwork and pouring of the retaining wall. The protective device can be lifted up during the protection process as the retaining wall is poured, and can be removed and reused after the retaining wall construction is completed, thereby reducing construction costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the protective device provided in the embodiments of this application;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is another structural schematic diagram of the protective device provided in the embodiments of this application.

[0024] Figure label:

[0025] 1-Protective plate assembly; 11-Support frame; 12-Protective steel plate; 13-Transfer hole; 14-Horizontal bar; 15-Hydraulic lifting pole; 16-First protective steel wire rope net; 17-Second protective steel wire rope net; 2-Hydraulic telescopic support assembly; 21-First hydraulic support rod; 22-First connecting rod; 23-Second hydraulic support rod; 24-Third hydraulic support rod; 3-Outrigger; 31-Opening; 4-Jack; 5-Anti-detachment sleeve; 6-Temporary support rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the embodiments and features described in these embodiments can be combined with each other unless otherwise specified.

[0028] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. The terms "set", "open", "installed", "connected", and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, and integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0029] See Figure 1 The protective device provided in this application includes a vertically arranged protective plate assembly 1, and a hydraulic telescopic support assembly 2 extending obliquely downward is provided on one side of the protective plate assembly 1; a vertically arranged support leg 3 and a jack 4 are connected to the lower part of the protective plate assembly 1; when the jack 4 is in the retracted state, the lower end of the jack 4 is higher than the lower end of the support leg 3.

[0030] The protective plate assembly 1 is a vertically arranged rectangular structure used to protect the sidewall of the retaining wall foundation pit. A hydraulic telescopic support assembly 2 is located on one side of the protective plate assembly 1, used to support and press the protective plate assembly 1 firmly against the sidewall of the retaining wall foundation pit during protection. Outriggers 3 are connected below the protective plate assembly 1 to support its lower end. Jacks 4 are located below the protective plate assembly 1 to lift it.

[0031] The number of hydraulic telescopic support components 2, outriggers 3, and jacks 4 can be one, two, or more, depending on the size of the protective plate assembly 1. The smaller the size of the protective plate assembly 1, the fewer hydraulic telescopic support components 2, outriggers 3, and jacks 4 are required; conversely, the larger the size of the protective plate assembly 1, the more hydraulic telescopic support components 2, outriggers 3, and jacks 4 are required. For example, there are four hydraulic telescopic support components 2, outriggers 3, and jacks 4, evenly distributed horizontally on the protective plate assembly 1.

[0032] The method for constructing a retaining wall using the protective device provided in this application includes:

[0033] S1. Excavate the retaining wall foundation pit, transport the protective device provided in the above embodiment to the retaining wall foundation pit, support the outrigger 3 on the retaining wall construction surface in the retaining wall foundation pit, and press the protective plate assembly 1 tightly onto the side wall of the retaining wall foundation pit.

[0034] S2. Control the jack 4 to be in the retracted state, and support the temporary support rod 6 between the jack 4 and the retaining wall construction surface; control the jack 4 to lift the protective plate assembly 1, and at the same time control the hydraulic telescopic support assembly 2 to extend;

[0035] S3. After the jack 4 is lifted, a construction space is formed between the outrigger 3 and the retaining wall construction surface. A section of retaining wall is constructed in the construction space. After the section of retaining wall solidifies, the top surface of the section of retaining wall forms a retaining wall construction surface for constructing the next section of retaining wall. Repeat step S2 until all retaining walls are constructed.

[0036] In step S1, after the retaining wall foundation pit is excavated, one, two, or more protective devices are transported to the pit using a loader or excavator, depending on the pit's dimensions. The bottom wall of the foundation pit serves as the construction surface for the first section of the retaining wall. The outriggers 3 are supported on this construction surface, and the protective plate assembly 1 is placed against the side wall of the foundation pit. The hydraulic telescopic support assembly 2 is extended to press the protective plate assembly 1 firmly against the side wall of the foundation pit, thus protecting the retaining wall foundation pit. In this step, the protective plate assembly 1 is primarily supported by the outriggers 3.

[0037] In step S2, when jack 4 is in the retracted state, there is a certain height between the lower end of jack 4 and the construction surface of the retaining wall. The temporary support rod 6, which provides temporary support, is placed between jack 4 and the construction surface of the retaining wall, thus supporting jack 4. When jack 4 is controlled to lift the protective plate assembly 1, the protective plate assembly 1 drives the outrigger 3 to rise. During this process, the hydraulic telescopic support assembly 2 is simultaneously extended, ensuring that the protective plate assembly 1 always protects the sidewall of the retaining wall pit, preventing it from overturning. In this step, by setting up the temporary support rod 6 and controlling the lifting of jack 4, the combination of the temporary support rod 6 and jack 4 replaces the outrigger 3 to support the protective plate assembly 1, achieving a change in the support position.

[0038] In step S3, after the jack 4 is lifted, the outrigger 3 detaches from the retaining wall construction surface, forming a construction space between them. Within this space, formwork is erected, reinforcing bars are tied, and concrete is poured. Once the concrete has solidified, a section of retaining wall is formed. The temporary support rod 6 from step S2 is cast into the concrete. Since the temporary support rod 6 is a consumable material, it can be made of low-cost wood. After all retaining wall construction is completed, a loader or excavator can be used to transport the protective device to the next work pit.

[0039] The protective device and retaining wall construction method provided in this application embodiment protect the excavated retaining wall foundation pit, preventing it from collapsing and deforming during subsequent retaining wall construction, thus ensuring the safety of personnel involved in formwork and pouring. The protective device can be lifted during the protection process as the retaining wall is poured, and can be removed and reused after the retaining wall construction, solving the problem of permanent protective structures not being reusable. During the retaining wall construction process, only the temporary support rod 6 is a consumable material, greatly reducing construction costs.

[0040] See Figure 1 , Figure 2To prevent the jack 4 from slipping off the temporary support rod 6 during the lifting process, a vertically installed anti-slip sleeve 5 is connected to the lower end of the jack 4. When the jack 4 is in the retracted state, the lower end of the anti-slip sleeve 5 is higher than the lower end of the outrigger 3. For example, the jack 4 is vertically installed, the piston rod of the jack 4 is located above the cylinder body, the upper end of the piston rod of the jack 4 is connected to the protective plate assembly 1, and the anti-slip sleeve 5 is fixed to the lower end of the cylinder body of the jack 4. In step S2, when the jack 4 is in the retracted state, there is a certain height between the lower end of the anti-slip sleeve 5 and the retaining wall construction surface to facilitate the installation of the temporary support rod 6. Specifically, the upper end of the temporary support rod 6 is inserted into the anti-slip sleeve 5, thus using the anti-slip sleeve 5 to radially limit the upper end of the temporary support rod 6, preventing the jack 4 from slipping off the temporary support rod 6 during the lifting process.

[0041] See Figure 1 The protective plate assembly 1 includes a vertically arranged support frame 11, on which a protective steel plate 12 is mounted. The support frame 11 is a rectangular frame structure welded from structural steel, and the protective steel plate 12 is welded to the support frame 11. To facilitate transportation of the protective plate assembly 1 by loaders or excavators, the protective steel plate 12 is provided with transfer holes 13. By providing transfer holes 13, the protective steel plate 12 can be directly transferred using a loader or excavator hooking onto the transfer holes 13.

[0042] See Figure 1 , Figure 2 The hydraulic telescopic support assembly 2 includes a first hydraulic support rod 21 arranged obliquely downwards in a direction away from the protective plate assembly 1. The first hydraulic support rod 21 is connected to the protective plate assembly 1 via a first connecting rod 22. For example, one end of the first connecting rod 22 is fixedly connected to the support frame 11 of the protective plate assembly 1, and the other end of the first connecting rod 22 is fixedly connected to the upper end of the first hydraulic support rod 21. During operation, the length of the hydraulic telescopic support assembly 2 can be adjusted simply by controlling the extension or retraction of the first hydraulic support rod 21.

[0043] To increase the telescopic range of the hydraulic telescopic support assembly 2, the hydraulic telescopic support assembly 2 also includes a second hydraulic support rod 23; the first connecting rod 22 is hinged to the protective plate assembly 1, and both ends of the second hydraulic support rod 23 are hinged to the protective plate assembly 1 and the first connecting rod 22, respectively. During operation, the angle between the first connecting rod 22 and the horizontal plane can be adjusted by controlling the extension or retraction of the second hydraulic support rod 23.

[0044] To increase the telescopic range of the hydraulic telescopic support assembly 2, the hydraulic telescopic support assembly 2 also includes a third hydraulic support rod 24; the first hydraulic support rod 21 is hinged to the first connecting rod 22, and the two ends of the third hydraulic support rod 24 are respectively hinged to the protective plate assembly 1 and the first hydraulic support rod 21. During operation, the angle between the first hydraulic support rod 21 and the first connecting rod 22 can be adjusted by controlling the extension or retraction of the third hydraulic support rod 24.

[0045] See Figure 1 , Figure 2 The outrigger 3 is a hollow tubular structure. A vertically oriented opening 31 is located on the wall of the outrigger 3 facing the hydraulic telescopic support assembly 2. The jack 4 is housed within the inner cavity of the outrigger 3. By making the outrigger 3 a hollow tubular structure and providing the opening 31 on its wall, the jack 4 can be installed into the inner cavity of the outrigger 3 through the opening 31, and its working status can be observed through the opening 31 during operation. By placing the jack 4 inside the outrigger 3, the outrigger 3 and the jack 4 can support the same position of the protective plate assembly 1. Therefore, in steps S2 and S3, when the outrigger 3 and the jack 4 are used to alternately support the protective plate assembly 1, the stability and reliability of the support can be guaranteed.

[0046] See Figure 3 To increase the protective height of the protective device, a crossbar 14 is provided above the protective plate assembly 1. Both ends of the crossbar 14 are connected to the protective plate assembly 1 via hydraulic lifting poles 15. A first protective steel wire rope net 16 is provided between the crossbar 14 and the upper end of the protective plate assembly 1. For example, the hydraulic lifting pole 15 is vertically positioned, with its lower end connected to the support frame 11 of the protective plate assembly 1 and its upper end connected to the crossbar 14. Alternatively, the middle of the crossbar 14 can also be connected to the protective plate assembly 1 via a vertically positioned hydraulic lifting pole 15. During operation, the height of the crossbar 14 can be adjusted by controlling the extension or retraction of the hydraulic lifting pole 15, and different sizes of the first protective steel wire rope net 16 can be laid according to the height between the crossbar 14 and the upper end of the protective plate assembly 1 to meet different protective height requirements. Furthermore, hanging rings are provided on the upper end of the support frame 11, the crossbar 14, and the hydraulic lifting pole 15 to facilitate the laying of the first protective steel wire rope net 16. To further enhance the protective range of the protective device, a second protective wire rope net 17 is installed below the protective plate assembly 1. Hanging rings are provided on the lower end of the support frame 11 and on the support leg 3 for easy installation of the second protective wire rope net 17.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of this application and within the spirit and principles of this application shall still fall within the protection scope of the technical solution of this application.

Claims

1. A protective device, characterized in that, It includes a vertically arranged protective plate assembly (1), and a downwardly extending hydraulic telescopic support assembly (2) is provided on one side of the protective plate assembly (1). The lower part of the protective plate assembly (1) is connected to a vertically arranged support leg (3) and a jack (4); when the jack (4) is in the retracted state, the lower end of the jack (4) is higher than the lower end of the support leg (3); The hydraulic telescopic support assembly (2) includes a first hydraulic support rod (21) that is obliquely downward along a direction away from the protective plate assembly (1), and the first hydraulic support rod (21) is connected to the protective plate assembly (1) through a first connecting rod (22); The hydraulic telescopic support assembly (2) further includes a second hydraulic support rod (23); the first connecting rod (22) is hinged to the protective plate assembly (1), and the two ends of the second hydraulic support rod (23) are respectively hinged to the protective plate assembly (1) and the first connecting rod (22); The hydraulic telescopic support assembly (2) further includes a third hydraulic support rod (24); the first hydraulic support rod (21) is hinged to the first connecting rod (22), and the two ends of the third hydraulic support rod (24) are respectively hinged to the protective plate assembly (1) and the first hydraulic support rod (21); The outrigger (3) has a vertically arranged opening (31) on its wall and on the side facing the hydraulic telescopic support assembly (2), and the jack (4) is arranged in the inner cavity of the outrigger (3). A crossbar (14) is provided above the protective plate assembly (1). The two ends of the crossbar (14) are connected to the protective plate assembly (1) through a hydraulic lifting pole (15). A first protective steel wire rope net (16) is provided between the crossbar (14) and the upper end of the protective plate assembly (1).

2. The protective device according to claim 1, characterized in that, The lower end of the jack (4) is connected to a vertically arranged anti-slip sleeve (5); when the jack (4) is in the retracted state, the lower end of the anti-slip sleeve (5) is higher than the lower end of the support leg (3).

3. The protective device according to claim 1, characterized in that, The protective plate assembly (1) includes a vertically arranged support frame (11), on which a protective steel plate (12) is provided.

4. The protective device according to claim 3, characterized in that, The protective steel plate (12) is provided with transfer holes (13).

5. A method for constructing a retaining wall, characterized in that, include: S1. Excavate the retaining wall foundation pit, transport the protective device according to any one of claims 1 to 4 to the retaining wall foundation pit, the outrigger (3) supports the retaining wall construction surface in the retaining wall foundation pit, and the hydraulic telescopic support assembly (2) presses the protective plate assembly (1) against the foundation pit sidewall of the retaining wall foundation pit. S2. Control the jack (4) to be in a retracted state, support the temporary support rod (6) between the jack (4) and the retaining wall construction surface; control the jack (4) to lift the protective plate assembly (1), and at the same time control the hydraulic telescopic support assembly (2) to extend; S3. After the jack (4) is lifted, a construction space is formed between the outrigger (3) and the retaining wall construction surface. A section of retaining wall is constructed in the construction space. After the section of retaining wall solidifies, the top surface of the section of retaining wall forms a retaining wall construction surface for constructing the next section of retaining wall. Step S2 is repeated until all retaining walls are constructed.

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