A foundation pit supporting device

Abstract

The utility model belongs to the technical field of foundation pit support equipment, especially is involved in a kind of foundation pit support device.The technology includes the horizontal setting of larsen steel sheet pile and H-shaped steel, and the rear side wall of upper flange plate on H-shaped steel is provided with plugboard, and the width of plugboard is less than the width of upper flange plate;The top of plugboard is provided with recess, and lubricating assembly is arranged in recess for reducing the friction between plugboard and larsen steel sheet pile.The utility model can more easily insert the flange on H-shaped steel into the clearance between larsen steel sheet pile.

Description

Technical Field

[0001] This utility model belongs to the technical field of foundation pit support equipment, and in particular relates to a foundation pit support device. Background Technology

[0002] In construction projects, foundation pit support is used. Foundation pit support is a key measure to ensure the safety and stability of earthwork excavation. Its function is to prevent the collapse of the foundation pit wall, control the deformation of the surrounding strata, and protect adjacent buildings and underground facilities.

[0003] Currently, existing foundation pit support systems typically use a combination of H-beams and Larssen sheet steel (U-shaped steel plates). Several Larssen sheets are interlocked to form a continuous retaining wall, preventing soil collapse. The H-beams act as a rigid support frame, providing strong resistance to bending and lateral pressure, making them suitable for withstanding deep soil pressure. Therefore, they provide the main load-bearing support for the Larssen sheet steel. In practice, Larssen sheet piles are first driven into the soil one by one using a vibratory hammer or static pressure pile driver, and then interlocked to form a continuous retaining wall. Subsequently, the insertion points for the flanges of the H-beams are located inside the sheet piles, and a crane with a vibratory device is used to vertically insert the flanges of the H-beams along the guide plates inside the Larssen sheet steel. Therefore, in this process, the Larssen sheet piles serve as the foundation pit support enclosure, while the H-beams provide support for the Larssen sheet steel.

[0004] During the above operation, the gap between the Larssen steel plate and the guide plate is just enough to allow the H-beam flange to be inserted. Therefore, after the H-beam flange is inserted, it can fit snugly against the Larssen steel plate, and the H-beam can then effectively support the Larssen steel sheet pile. Although the design of fitting snugly against the gap can achieve effective support, there is a problem that the gap is too small for the H-beam flange. Therefore, it takes a certain amount of time to align the H-beam flange with the gap, making it inconvenient to insert the H-beam flange into the gap of the Larssen steel sheet pile. Utility Model Content

[0005] The purpose of this utility model is to provide a foundation pit support device that facilitates the insertion of the flange of the H-beam into the gap of the Larssen sheet pile.

[0006] The aforementioned foundation pit support device includes horizontally arranged Larssen sheet piles and H-beams. An insert plate is provided on the rear side wall of the upper flange of the H-beam, and the width of the insert plate is smaller than the width of the upper flange. A groove is provided on the top of the insert plate, and a lubrication component for reducing friction between the insert plate and the Larssen sheet pile is provided in the groove.

[0007] Furthermore, the insertion end of the insert plate has an arc-shaped structure.

[0008] Furthermore, the curved surface of the arc structure has a chamfered angle at the corner where it meets the side wall of the insert plate.

[0009] Furthermore, the lubrication assembly includes a reservoir, and the contact surface between the reservoir and the Larssen sheet pile is provided with an outlet hole and an inlet hole that communicate with each other internally and externally, through which lubricant is injected into the reservoir.

[0010] Furthermore, there are several outlet holes.

[0011] Furthermore, a fixing block is fixed to one side wall of the liquid storage box, and a slot for the fixing block to be inserted is provided on the insert plate. The fixing block is detachably connected to the slot by a threaded rod.

[0012] Furthermore, the insert plate and lubrication assembly are in two sets, located on the rear sidewalls of the upper and lower flanges of the H-beam, respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention features an insert plate on the upper flange of an H-beam, the width of which is smaller than that of the upper flange. A groove is formed at the top of the insert plate, and a lubrication component is installed within the groove to reduce friction between the insert plate and the Larssen sheet pile. The insert plate's dimensions are designed to facilitate insertion into the Larssen sheet pile, thereby facilitating the insertion of the flange on the H-beam into the gap between the Larssen sheet piles. The lubrication component design further enhances the ease with which the flange on the H-beam is inserted into the gap between the Larssen sheet piles during the insertion process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure without Larssen sheet piles after cross-section at point AA;

[0017] Figure 3 for Figure 2 Right view structural schematic diagram of the H-beam and insert plate;

[0018] Figure 4 This is a diagram showing the usage state of this utility model;

[0019] Figure 5 for Figure 1 Top view of the structure;

[0020] Figure 6 for Figure 1 A top view of a structure without Larssen sheet piles;

[0021] The components in the diagram are named as follows: 1. Larssen sheet pile; 2. H-beam; 2.1. Upper flange; 2.2. Web; 2.3. Lower flange; 3. Guide plate; 4. Insert plate; 5. Liquid inlet; 6. Liquid outlet; 7. Fixing block; 8. Threaded rod; 9. Liquid storage box. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0023] Example

[0024] The foundation pit support device described in this embodiment, such as Figure 1 and Figure 4 As shown, it includes horizontally arranged Larssen sheet piles 1 and H-beams 2. Larssen sheet piles 1 are a known existing technology; they are also called U-shaped sheet piles. Figure 1 As can be seen from the orientation, the Larssen sheet pile 1 has an opening facing downwards, and the left and right sides of the Larssen sheet pile 1 have interlocking seams; two guide plates 3 arranged left and right are fixed inside the Larssen sheet pile 1, and a gap is left between the guide plates 3 and the inner top of the Larssen sheet pile 1 for the upper flange 2.1 or the lower flange 2.3 to be inserted; the H-beam 2 is also a known technology, including the upper flange 2.1, web 2.2 and lower flange 2.3; as Figure 4 The location in the middle, Figure 4 The image shows a top-down view of the Larssen sheet piles 1 and H-beams 2 after installation during actual use. During installation, several Larssen sheet piles 1 are prepared, and then installed together from left to right. The openings of the sheet piles 1 on the left and right sides face opposite directions. The sheet piles 1 are then pushed from front to back, allowing the interlocking jaws on the left and right sides to engage. Once engaged, they form a... Figure 4 The structure shown in the figure; when it is necessary to insert Larssen sheet piles 1 into the foundation pit, Figure 4The rear sidewall of the Larssen sheet pile 1 is the end inserted into the soil. Then, a vibratory hammer or static pressure pile driver is used to drive each Larssen sheet pile 1 into the soil. After several Larssen sheet piles 1 are driven in, they interlock to form a continuous retaining wall. Therefore, the retaining wall formed by several Larssen sheet piles 1 can achieve the purpose of soil and water retention. After the Larssen sheet piles 1 are installed, several H-beams 2 are prepared, positioned below the Larssen sheet piles 1. Then, the upper flange 2.1 or lower flange 2.3 is inserted sequentially and at intervals between the inner top of the Larssen sheet pile 1 and the guide plate 3. After insertion, H-beams 2 are driven into the soil one by one using a vibratory hammer or static pressure pile driver. Therefore, once the H-beams 2 are installed, their flanges are positioned on the Larssen sheet piles 1 by guide plates 3. The H-beams 2 can provide strong resistance to bending and lateral pressure, making them suitable for withstanding deep soil pressure. Thus, they can provide the main load-bearing support for the Larssen sheet piles 1, ensuring the stability of the Larssen sheet piles 1 during use. Therefore, once the Larssen sheet piles 1 and H-beams 2 are driven into the soil around the foundation pit, the purpose of support can be achieved, ensuring the safety of the construction process.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, an insert plate 4 is provided on the rear side wall of the upper flange 2.1 on the H-beam 2, and the width of the insert plate 4 is smaller than the width of the upper flange 2.1;

[0026] The insert plate 4 can be fixed to the rear wall of the upper flange 2.1 by welding; the thickness of the insert plate 4 is equal to the thickness of the upper flange 2.1; after installation, the insert plate 4 is aligned with the upper flange 2.1; during use, the gap between the conventional guide plate 3 and the Larssen sheet pile 1 is just enough for the upper flange 2.1 to pass through; because the insert plate 4 is fixed to the rear wall of the upper flange 2.1, when the upper flange 2.1 is inserted between the Larssen sheet pile 1 and the guide plate 3, the insert plate 4 will first be inserted into the Larssen sheet pile 1. Between the guide plate 3 and the guide plate 4, since the width of the insert plate 4 is smaller than the width of the upper flange 2.1, the insert plate 4 can be inserted into the gap between the Larssen sheet pile 1 and the guide plate 3 more easily than the upper flange 2.1. Therefore, the insert plate 4 can replace the upper flange 2.1 and be inserted into the gap between the Larssen sheet pile 1 and the guide plate 3 first. Then the upper flange 2.1 follows the insert plate 4 into the gap between the Larssen sheet pile 1 and the guide plate 3, which makes it easier to insert the upper flange 2.1 on the H-beam 2 into the Larssen sheet pile 1.

[0027] like Figure 1 and Figure 2 As shown, the insertion end of the insert plate 4 has an arc-shaped structure, and the insertion end of the insert plate 4 is... Figure 2The upper end of the middle insert plate 4 needs to be inserted into the soil after the insert plate 4 is inserted between the Larssen sheet pile 1 and the guide plate 3. Therefore, the upper end of the insert plate 4 is designed to be arc-shaped and its width is smaller than the width of the upper wing plate 2.1, so that the insert plate 4 can be driven into the soil more easily.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the curved surface of the arc-shaped structure has a chamfered angle at the corner of the side wall of the insert plate 4; the curved surface is the curved surface of the arc-shaped structure of the insert plate 4; the curved surface is... Figure 3 The upper end of the middle insert plate 4; the side wall of the insert plate 4 is... Figure 3 The left and right side walls of the middle insert plate 4, therefore Figure 3 The left and right side walls of the middle insert plate 4 form an angle with the upper end of the insert plate 4; the structure of the angle is as follows: Figure 3 The "V"-shaped structure with the opening facing downwards; because the upper end of the insert plate 4 is the end that is inserted into the soil, the design of the above structure allows the insert plate 4 to be driven into the soil more easily.

[0029] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a groove is provided on the top of the insert plate 4, and one side of the top of the insert plate 4 is the side that is close to the inner wall of the Larssen sheet pile 1. Therefore, the groove opening is the side that is close to the inner wall of the Larssen sheet pile 1.

[0030] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a liquid storage box 9 is provided in the groove. The contact surface between the liquid storage box 9 and the Larssen sheet pile 1 has an outlet hole 6 and an inlet hole 5 that communicate internally and externally. Lubricant is injected into the liquid storage box 9 through the inlet hole 5. This section of the design constitutes a lubrication assembly for reducing friction between the insert plate 4 and the Larssen sheet pile 1. The lubricant can be grease. The thickness of the liquid storage box 9 is preferably the same as the depth of the groove, so that the liquid storage box 9 can be placed precisely into the groove, preventing part of the liquid storage box 9 from moving out of the groove and affecting the insertion of the insert plate 4 between the Larssen sheet pile 1 and the guide plate 3. The contact surface between the liquid storage box 9 and the Larssen sheet pile 1 is... Figure 2 The front side wall of the middle liquid storage box 9; according to Figure 2In the reservoir 9, the inlet hole 5 is located on the lower part of the front side wall, and the outlet hole 6 is located on the upper part of the front side wall. Because the groove opening is close to the inner side wall of the Larssen sheet pile 1, the outlet hole 6 of the reservoir 9 is also located close to the inner side wall of the Larssen sheet pile 1. During use, lubricant is injected into the reservoir 9 through the inlet hole 5. When the insert plate 4 is inserted into the gap between the Larssen sheet pile 1 and the guide plate 3, the lubricant in the reservoir 9 can flow from the outlet hole 6. During the insertion of the insert plate 4, the insert plate 4 and the inner wall of the Larssen sheet pile 1 will be in contact with each other. When they are in contact, the lubricant can flow from the outlet hole 6 into the space between the Larssen sheet pile 1 and the insert plate 4. Therefore, when the insert plate 4 is inserted between the Larssen sheet pile 1 and the guide plate 3, it can achieve the purpose of lubrication and friction, so that the insert plate 4 can be inserted more smoothly into the gap between the Larssen sheet pile 1 and the guide plate 3, thereby allowing the upper wing plate 2.1 connected to the insert plate 4 to be inserted more smoothly along the Larssen sheet pile 1.

[0031] In practice, vegetable oil-based lubricants can also be used as the lubricant in the lubrication components;

[0032] like Figure 1 and Figure 2 As shown, there are several liquid outlet holes 6, and these multiple liquid outlet holes 6 are arranged in a... Figure 2 The upper part of the front side wall of the middle liquid storage box 9 has multiple liquid outlet holes 6, which can accelerate the flow rate of lubricating fluid.

[0033] like Figure 1 , Figure 2 and Figure 6 As shown, a fixing block 7 is fixed to one side wall of the liquid storage box 9, and a slot for the fixing block 7 to be inserted is provided on the insert plate 4. The fixing block 7 is detachably connected to the slot through a threaded rod 8; the liquid storage box 9 is placed in the groove; according to Figure 2 The slot is located at the bottom of the liquid storage box 9 and communicates with the groove. The insert plate 4 has a first threaded hole that communicates with the left and right sides. The fixing block 7 has a second threaded hole that communicates with the left and right sides. The center lines of the first threaded hole and the second threaded hole are on the same straight line. In use, one end of the threaded rod 8 passes through the first threaded hole on the right side of the fixing block 7, the second threaded hole, and the first threaded hole on the left side of the fixing block 7 in sequence, so that the fixing block 7 can be fixed in the slot. Because the fixing block 7 is fixed on the liquid storage box 9, the fixing block 7 achieves the purpose of limiting the liquid storage box 9 after it is fixed. When the threaded rod 8 is taken out from the first threaded hole and the second threaded hole, according to Figure 6In the orientation of the plate 4, both the liquid storage box 9 and the fixing block 7 are connected to the front side wall of the plate 4. Therefore, the fixing block 7 can be removed from the slot, which in turn allows the liquid storage box 9 to be removed from the groove, thus achieving the purpose of detaching the liquid storage box 9. The Larssen sheet piles 1 and H-beams 2 provide both temporary and permanent support. For temporary support, the Larssen sheet piles 1 and H-beams 2 need to be pulled out of the soil. When the Larssen sheet piles 1 and H-beams 2 are pulled out, the liquid storage box 9 will be removed. At this time, the detachable design of the liquid storage box 9 makes it easy to replace the liquid storage box 9.

[0034] like Figure 3 As shown, the insert plate 4 and the lubrication assembly are in two sets, located on the rear side walls of the upper flange 2.1 and lower flange 2.3 of the H-beam 2, respectively. Preferably, the upper end of the web 2.2 is extended, and the left side wall of the web 2.2 is fixed to the right side wall of the left insert plate 4, and the right side wall of the web 2.2 is fixed to the left side wall of the right insert plate 4. After fixing, the extended portion of the web 2.2 can support the two insert plates 4, making the insert plates 4 more stable during insertion into the soil. When inserting the flange into the Larssen sheet pile 1, because the upper flange 2... The upper wing plate 2.1 and the lower wing plate 2.3 have the same structure. For ease of use, the upper wing plate 2.1 may be inserted into the gap between the Larssen sheet pile 1 and the guide plate 3, or the lower wing plate 2.3 may be inserted into the gap between the Larssen sheet pile 1 and the guide plate 3. In this case, by providing insert plates 4 and lubrication components on both the upper wing plate 2.1 and the lower wing plate 2.3, it is possible to easily insert either the upper wing plate 2.1 or the lower wing plate 2.3 into the Larssen sheet pile 1, thereby increasing the convenience of use.

[0035] In practical application: First, the surveying and layout are carried out. Then, a crane is used to lift the Larssen sheet pile 1 and place it into the corresponding position in the soil. Next, a vibratory hammer or static pressure pile driver is used to drive the Larssen sheet pile 1 into the soil. Following the above method, multiple Larssen sheet piles 1 are driven into the soil one by one. During the driving process, the interlocking joints between adjacent Larssen sheet piles 1 interlock to form a continuous retaining wall. After interlocking, the... Figure 4As can be seen from the orientation; after the Larssen sheet pile 1 is installed, a crane is used to lift the H-beam 2, and then the insert plate 4 on the upper flange 2.1 or lower flange 2.3 is aligned with the gap between the Larssen sheet pile 1 and the guide plate 3. At this time, if the insert plate 4 on the upper flange 2.1 is aligned with the gap between the Larssen sheet pile 1 and the guide plate 3, lubricant is injected into the liquid storage box 9 inside the insert plate 4 after alignment; then, a vibratory hammer or static pressure pile driver is used to push the H-beam 2 into the soil. During the movement... The middle insert plate 4 will be driven into the gap between the Larssen sheet pile 1 and the guide plate 3. The insert plate 4 will then drive the upper wing plate 2.1 into the gap between the Larssen sheet pile 1 and the guide plate 3. The upper wing plate 2.1 will then be driven into the soil along the gap between the Larssen sheet pile 1 and the guide plate 3. During the process of the insert plate 4 and the upper wing plate 2.1 being driven into the Larssen sheet pile 1, the lubricant can gradually flow out from the outlet hole 6 on the liquid storage box 9, thus achieving the purpose of lubrication while driving. Then, multiple H-beams 2 are installed in sequence. Figure 4 The sheet piles are driven in at intervals; after the Larssen sheet piles 1 and H-beams 2 are installed, they can form a foundation pit support. During this process, because the width of the insert plate 4 is smaller than the width of the upper wing plate 2.1, it is easy to insert into the gap between the Larssen sheet pile 1 and the guide plate 3. Thus, the insert plate 4 can easily drive the upper wing plate 2.1 or the lower wing plate 2.3 into the gap between the Larssen sheet pile 1 and the guide plate 3. Then, through the lubricant in the liquid storage box 9, it is easy for the upper wing plate 2.1 or the lower wing plate 2.3 to slide down and be inserted along the Larssen sheet pile 1. Therefore, the problem of not being able to insert the wing plate of the H-beam 2 into the gap of the Larssen sheet pile 1 in the prior art is solved during operation.

Claims

1. A foundation pit support device, comprising horizontally arranged Larssen sheet piles (1) and H-beams (2), characterized in that: An insert plate (4) is provided on the rear side wall of the upper flange (2.1) of the H-beam (2). The width of the insert plate (4) is smaller than the width of the upper flange (2.1). A groove is provided on the top of the insert plate (4). A lubrication component for reducing friction between the insert plate (4) and the Larssen sheet pile (1) is provided in the groove.

2. The foundation pit support device according to claim 1, characterized in that: The insertion end of the insert plate (4) has an arc-shaped structure.

3. The foundation pit support device according to claim 2, characterized in that: The curved surface of the arc structure has a beveled angle at the corner of the side wall of the insert plate (4).

4. The foundation pit support device according to claim 1, characterized in that: The lubrication assembly includes a reservoir (9), and the reservoir (9) and the Larssen sheet pile (1) have an outlet hole (6) and an inlet hole (5) that are connected internally and externally. Lubricant is injected into the reservoir (9) through the inlet hole (5).

5. The foundation pit support device according to claim 4, characterized in that: There are several outlet holes (6).

6. The foundation pit support device according to claim 4, characterized in that: A fixing block (7) is fixed to one side wall of the liquid storage box (9), and a slot for the fixing block (7) to be inserted is provided on the insert plate (4). The fixing block (7) is detachably connected to the slot by a threaded rod (8).

7. The foundation pit support device according to any one of claims 1-6, characterized in that: The insert plate (4) and the lubrication assembly are in two sets, which are located on the rear sidewalls of the upper flange (2.1) and lower flange (2.3) of the H-beam (2), respectively.

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