Foundation pit slope protection structure

Abstract

The utility model discloses a foundation pit slope protection structure, which belongs to the technical field of foundation pit slope protection and comprises a protection plate, a base, a support mechanism and a jacking device. The protection plate is obliquely arranged along the slope of the foundation pit slope; the base is horizontally arranged beside a slope and fixed to the bottom of a foundation pit through an anchoring assembly, and the two sides of the base are connected with the lower ends of the protection plates through hinge shafts. The supporting mechanism comprises two supporting arms symmetrically arranged on the upper surface of the base and a pressing rod piece arranged between the supporting arms, and the pressing rod piece is rotationally connected with the supporting arms. The jacking device is arranged on the upper surface of the base, and the upper end of the jacking device acts on one end of the pressing rod piece so that the other end of the pressing rod piece can press the protection plate. Holes do not need to be drilled in the side slope to fix the anchor cable, damage to a surface soil body structure can be reduced, and then the construction workload can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit slope protection technology, specifically to a foundation pit slope protection structure. Background Technology

[0002] The prestressed anchor cable frame beam system, widely used in traditional foundation pit slope protection engineering, mainly involves the following technical steps in its construction process: First, multiple rows and columns of boreholes are drilled to locate the slope surface. Then, pre-prepared steel strand anchor cables are inserted into the boreholes, and cement-based grout is injected into the holes using high-pressure grouting equipment to form a full-length bonded anchoring structure. Finally, the protective panel is fixed using the anchoring structure to complete the slope protection. It is evident that the main drawback of this traditional process is that the drilling operation occurs on the slope, and the resulting mechanical vibrations and impacts can damage the integrity of the surface soil structure, increasing the risk of slope collapse. Furthermore, to meet the reliable anchoring requirements between the protective panel and the slope surface, a dense array of anchor cables is often required, significantly increasing the amount of drilling work and ultimately extending the construction period. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a foundation pit slope protection structure that does not require drilling holes in the slope and helps to reduce the workload.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A foundation pit slope protection structure includes a protective plate, a base, a support mechanism, and a jacking device. The protective plate is arranged inclined along the slope of the foundation pit. The base is horizontally set beside the slope and fixed to the bottom of the foundation pit by an anchoring assembly. The two sides of the base are connected to the lower ends of the protective plate by hinge shafts. The support mechanism includes two arms symmetrically arranged on the upper surface of the base and a pressure member between the arms, the pressure member and the arms being rotatably connected. The jacking device is located on the upper surface of the base, and the upper end of the jacking device acts on one end of the pressure member so that the other end of the pressure member presses against the protective plate.

[0006] Furthermore, the pressure rod includes a rotating rod and a pressure rod. The rotating rod has a pivot in the middle that is connected to the support arm. The pressure rod and the rotating rod are T-shaped and connected as one piece. The outer surface of the pressure rod is an arc-shaped surface that contacts the protective plate. The length of the pressure rod is basically the same as the width of the protective plate, which is conducive to the uniform distribution of pressure.

[0007] Furthermore, the telescopic end of the lifting device is provided with a connector with a through hole and a pin passing through the connector. The rotating rod is provided with a strip-shaped groove extending along its length, and the pin is slidably inserted into the groove.

[0008] Furthermore, multiple stacked disc springs are fitted onto the outer sides of the support arms at both ends of the rotating shaft. Nuts are connected to the outer sides of the disc springs on the rotating shaft to compress the disc springs and form rotational damping.

[0009] Furthermore, the anchoring assembly includes multiple pre-embedded anchor rods arranged in a rectangular array, and the base is provided with connecting holes that run from bottom to top. The pre-embedded anchor rods are fixed by nuts after passing through the corresponding connecting holes.

[0010] Furthermore, the lifting device uses hydraulic jacks, the bottom of which is fixed to the upper surface of the base by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In the structure, only the base is fixed to the bottom of the pit through anchoring components. There is no anchor cable structure between the protective plate and the slope. Therefore, there is no need to drill holes in the slope during construction, which helps to reduce damage to the surface soil structure of the slope.

[0013] 2. By using a jacking device to lift one end of the pressure bar, and based on the lever principle, the other end of the pressure bar will apply force to the protective plate, pressing the protective plate firmly onto the slope to achieve protection. The construction operation is relatively simple. Compared to installing an anchor cable array on the slope, this method reduces the workload. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 This is an exploded view of this utility model.

[0016] Figure 3 yes Figure 1 Partial view of the central lifting device and pressure rod.

[0017] The following are the labels in the diagram: 1. Protective plate; 2. Support arm; 3. Base; 4. Embedded anchor rod; 5. Lifting device; 6. Pressure rod; 61. Rotating rod; 62. Pressure rod; 7. Rotating shaft; 8. Connecting hole; 9. Disc spring; 10. Connector; 11. Slide groove; 12. Pin. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] like Figures 1-3As shown, the foundation pit slope protection structure of this embodiment includes a protective plate 1, a base 3, a support mechanism, and a lifting device 5. The protective plate 1 is arranged inclined along the slope of the foundation pit, and its lower end is connected to both sides of the base 3, which is horizontally set beside the slope, through a hinge shaft.

[0020] The base 3 is fixed to the bottom of the pit by an anchoring assembly. Specifically, the anchoring assembly consists of multiple pre-embedded anchor rods 4 arranged in a rectangular array. The base 3 has a connecting hole 8 that runs from bottom to top. After the pre-embedded anchor rods 4 pass through the corresponding connecting hole 8, they are fixed by nuts, so that the base 3 obtains a uniformly distributed anchoring force, thereby effectively resisting the lateral displacement of the slope soil.

[0021] The support mechanism includes a pressure rod 6 and two support arms 2, which are symmetrically arranged on the upper surface of the base 3. The pressure rod 6 includes a rotating rod 61 and a pressure rod 62, which are T-shaped and connected as a single unit. The outer surface of the pressure rod 62 is an arc-shaped surface that contacts the protective plate 1, such as a cylindrical structure. A rotating shaft 7 is provided in the middle of the rotating rod 61. Both ends of the rotating shaft 7 extend through to the outside of the support arm 2 and are rotatably connected to the support arm 2. Multiple stacked disc springs 9 are sleeved on the rotating shaft 7 and pre-tightened by the outer nuts to form a buffered rotational damping, which can reduce the impact on the pressure rod 6 and the rotating shaft 7 to avoid structural damage.

[0022] The lifting device 5 uses a hydraulic jack, the bottom of which is fixed to the upper surface of the base 3 by high-strength bolts to ensure no displacement deviation during force application. The telescopic end of the jack is dynamically connected to the rotating rod 61 through the connector 10. Specifically, the connector 10 has a through hole for the pin 12, and the rotating rod 61 has a strip-shaped groove 11 extending along its length. The pin 12 can slide along the groove 11 of the rotating rod 61, forming a sliding pair that can adapt to changes in angle.

[0023] During construction, the telescopic end of the lifting device 5 extends upwards. Through the cooperation of the pin 12 and the sliding groove 11 on the rotating rod 61, the vertical lifting force is converted into a counterclockwise rotational torque of the rotating rod 61 around the rotating shaft 7. This, in turn, drives the pressure rod 62 of the pressure member 6 to rotate accordingly. Its outer arc surface presses against the back of the protective plate 1 with progressive pressure, forming a downward pressure. By utilizing the lever principle, the output force of the lifting device 5 is effectively amplified, allowing the protective plate 1 to act stably on the slope surface, which helps prevent slope collapse and provides protection for the slope. Its structure and principle are relatively simple, making it easier to install and dismantle. Compared with traditional support processes, it does not require drilling holes in the slope, reducing the difficulty of operation and workload.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A foundation pit slope protection structure, characterized in that, include: Protective panels (1) are arranged at an angle along the slope of the foundation pit; The base (3) is horizontally set beside the slope and fixed to the bottom of the pit by anchoring components. The two sides of the base (3) are connected to the lower end of the protective plate (1) by hinge shafts. The support mechanism includes two arms (2) symmetrically arranged on the upper surface of the base (3), and a pressure rod (6) disposed between the arms (2), wherein the pressure rod (6) and the arms (2) are rotatably connected. A lifting device (5) is provided on the upper surface of the base (3). The upper end of the lifting device (5) acts on one end of the pressure rod (6) so that the other end of the pressure rod (6) presses against the protective plate (1).

2. The foundation pit slope protection structure according to claim 1, characterized in that, The pressure rod (6) includes a rotating rod (61) and a pressure rod (62). The rotating rod (61) has a pivot (7) connected to the support arm (2) in the middle. The pressure rod (62) and the rotating rod (61) are T-shaped and connected as one piece. The outer surface of the pressure rod (62) is an arc-shaped surface that contacts and acts on the protective plate (1).

3. The foundation pit slope protection structure according to claim 2, characterized in that, The telescopic end of the lifting device (5) is provided with a connector (10) with a through hole and a pin (12) passing through the connector (10). The rotating rod (61) is provided with a strip groove (11) extending along its length direction. The pin (12) is slidably inserted into the groove (11).

4. The foundation pit slope protection structure according to claim 2, characterized in that, Multiple stacked disc springs (9) are fitted on the outer sides of the support arm (2) at both ends of the rotating shaft (7). Nuts are connected to the outer sides of the disc springs (9) on the rotating shaft (7) to compress the disc springs (9) and form rotational damping.

5. The foundation pit slope protection structure according to claim 1, characterized in that, The anchoring assembly includes multiple pre-embedded anchor rods (4) arranged in a rectangular array. The base (3) is provided with a connecting hole (8) that runs from bottom to top. The pre-embedded anchor rods (4) pass through the corresponding connecting hole (8) and are then fixed by nuts.

6. The foundation pit slope protection structure according to claim 1, characterized in that, The lifting device (5) is a hydraulic jack, and its bottom is fixed to the upper surface of the base (3) by bolts.

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