Steel plate for foundation pit supporting

Abstract

The utility model discloses a steel plate for supporting a foundation pit, which comprises a front connecting steel plate, an upper butt joint, a left lap joint, a right lap joint and a U-shaped short pipe, and a rear connecting steel plate is arranged behind the front connecting steel plate; the bent lapping edges of the left lapping head and the right lapping head are arranged at the short edges of the steel plates, so that the adjacent steel plates can be tightly attached and flat when the short edges are connected, the space which is 1.2 times of the thickness of the steel plates is reserved between the two steel plates, the space is specially used for inserting and fixing the steel plates on the upper layer, and the steel plates can be quickly positioned and mounted in the assembling process; even in a large-scale foundation pit supporting project, the splicing work of the steel plates can be rapidly completed, the steel plates can be universally used in foundation pit supporting projects with different scales and requirements through the bent landing edges with standard sizes and specific lengths, the lap joint components and the reserved steel plate gaps, the steel pipes can abut against the U-shaped pipes between the two sets of steel plates, and therefore the steel plates can be conveniently spliced. And a stable transverse connecting structure is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, and more specifically, to a steel plate used for foundation pit support. Background Art

[0002] During the steel pipe pile support process, the conventional practice is to excavate the foundation pit after the steel pipe pile construction is completed, and then hang steel mesh and spray concrete after the excavation is completed;

[0003] After searching, the existing patent (Announcement No.: CN220868244U) discloses a steel sheet pile foundation pit support structure, which includes steel sheet piles, which are surrounded by steel sheet piles to form a steel sheet pile enclosure. The corners of the steel sheet pile enclosure are provided with corner pile structures, which include steel pipe piles and multiple pipe pile locks fixed to the steel pipe piles. The steel sheet piles are provided with sheet pile locks, and the pipe pile locks are connected to the sheet pile locks. The angle formed between the pipe pile locks is consistent with the angle formed by adjacent steel sheet piles. The utility model can solve the problems of difficult overlap of steel sheet pile enclosures at corners, poor soil retaining and water stopping effects, and weak points of enclosure at corners, thereby increasing the safety of foundation pit enclosures. In the process of realizing the utility model, the inventor found that the existing technology has the following problems:

[0004] The existing foundation pit support structure has a complicated construction process due to the traditional foundation pit support method, which results in the foundation pit being exposed for a long time, thereby increasing safety risks and causing problems such as slope instability and groundwater influx. Moreover, if the foundation pit support takes too long, it will directly lead to delays in the subsequent main project and affect construction efficiency. Moreover, in construction projects, foundation pit support is an important cost expenditure. During the use of foundation pit support, the materials will be subjected to repeated loads, which will cause fatigue and damage to the materials, making them unable to be reused. These materials will often become construction waste after the project is completed. It takes a lot of time and money to deal with these construction wastes, resulting in high costs.

[0005] Therefore, in response to the above problems, a steel plate for foundation pit support is proposed. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a steel plate for foundation pit support to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a steel plate for foundation pit support, comprising a front connecting steel plate, an upper butt joint, a left lap joint, a right lap joint and a U-shaped short tube, a rear connecting steel plate being provided behind the front connecting steel plate, the upper butt joint being provided at the upper ends of the front connecting steel plate and the rear connecting steel plate respectively, and a connecting plate being provided on the opposite surfaces of the front connecting steel plate and the rear connecting steel plate;

[0008] The left lap joint is arranged on the left side of the connecting plate, the right lap joint is arranged on the right side of the connecting plate, the U-shaped short tubes are respectively welded on both sides of the front end surface of the front connecting steel plate, and the two groups of U-shaped short tubes are symmetrically arranged.

[0009] Preferably, the two groups of upper butt joints are bent toward a side away from the connecting plate, and the two groups of upper butt joints are arranged in a mirror image.

[0010] Preferably, the front and rear end faces of the connecting plate are welded to the front connecting steel plate and the rear connecting steel plate respectively, the front connecting steel plate and the rear connecting steel plate are symmetrically arranged, and a gap of 1.2 times the thickness of the steel plate is left between the front connecting steel plate and the rear connecting steel plate for the steel plate to be inserted.

[0011] Preferably, the left lap joint is bent toward a side away from the right lap joint, and the right lap joint is bent toward a side away from the left lap joint.

[0012] Preferably, the lengths of the two groups of upper joints are both set to 25 cm, the heights of the left lap joint and the right lap joint are both set to 20 cm, and the lengths of the two groups of U-shaped short tubes are 10 cm.

[0013] Preferably, both groups of U-shaped short tubes are provided with hanging holes on their tops, and the two groups of hanging holes are symmetrically arranged. Both groups of U-shaped short tubes are provided with hanging holes on their tops, and the two groups of hanging holes are symmetrically arranged.

[0014] Technical effects and advantages of this utility model:

[0015] Compared with the existing technology, the steel plate used for foundation pit support has bent overlaps of left and right overlap joints at the short sides of the steel plates, so that adjacent steel plates can fit tightly and flatly when connected at the short sides, and a space 1.2 times the thickness of the steel plates is reserved between the two steel plates, which is specifically used for the insertion and fixation of the upper steel plates. It can be quickly positioned and installed during the assembly process, and even for large-scale foundation pit support projects, the splicing of the steel plates can be completed quickly.

[0016] Compared with the existing technology, the steel plate used for foundation pit support has standard sizes and specific lengths of bent edges, overlapping parts and reserved steel plate gaps, making the steel plate universally applicable in foundation pit support projects of different scales and requirements. The steel pipe can be abutted against the U-shaped pipe between the two groups of steel plates to form a stable transverse connection structure, connecting the steel plates supporting the outer foundation pit on the left and right sides into a coordinated whole, significantly increasing the lateral displacement and anti-overturning capabilities of the entire support system, and enabling the steel plate to more stably withstand the pressure and lateral force from the soil outside the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front cross-section structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0019] Figure 3 It is a side view structural diagram of the utility model.

[0020] Figure 4 It is a schematic diagram of the top view structure of the utility model.

[0021] Figure 5 This is a schematic diagram of the top view of the U-shaped short tube structure of the utility model.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the left lap joint and the right lap joint of the utility model.

[0023] The accompanying drawings are marked as follows: 1. Front connecting steel plate; 2. Rear connecting steel plate; 3. Upper butt joint; 4. Connecting plate; 5. Left lap joint; 6. Right lap joint; 7. U-shaped short pipe; 8. Lifting hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0025] As attached Figures 1 to 6 The steel plate shown is used for foundation pit support and includes a front connecting steel plate 1, an upper butt joint 3, a left lap joint 5, a right lap joint 6, and a U-shaped short tube 7. The rear connecting steel plate 2 is provided behind the front connecting steel plate 1. The upper butt joint 3 is provided at the upper ends of the front connecting steel plate 1 and the rear connecting steel plate 2, respectively. A connecting plate 4 is provided on the opposite surface of the front connecting steel plate 1 and the rear connecting steel plate 2.

[0026] The left lap joint 5 is arranged on the left side of the connecting plate 4, the right lap joint 6 is arranged on the right side of the connecting plate 4, and the U-shaped short tubes 7 are respectively welded on both sides of the front end surface of the front connecting steel plate 1, and the two groups of U-shaped short tubes 7 are symmetrically arranged.

[0027] Among them: when the foundation pit support is started, the front connecting steel plate 1 forms a steel plate structure with the rear connecting steel plate 2 through the connecting plate 4, and the fixed steel plate structure is inserted between the steel pipe pile and the soil. The specific bending shape and 25cm length design of the two groups of upper butt joints 3 in the front connecting steel plate 1 and the rear connecting steel plate 2 enable them to fit tightly when the upper steel plate is installed and inserted into the butt joint, thereby enhancing the integrity and stability in the vertical direction when assembling multiple layers of steel plates. When the left lap joint 5 and the right lap joint 6 are bent outward away from each other and the height design is 20cm, it is ensured that when assembling two or more groups of steel plate structures, they can be reliably overlapped in the adjacent horizontal direction, preventing the steel plates from being displaced or dislocated in the horizontal direction, forming a continuous and stable overlap system, and then filling the soil behind the steel plate, through the steel plate and the steel pipe pile. The combined effect of the two makes the foundation pit no longer have the risk of collapse, and prevents the steel plates from being displaced or shifted in the horizontal direction. Through this standardized overlap design, workers can operate quickly when splicing horizontal steel plates without complicated measurements and adjustments. Skilled workers can quickly complete the splicing of multiple steel plates, which improves construction efficiency and can install multiple sets of steel plate structures. When the structures are on opposite sides, the two ends of two sets of steel pipes of the same length can be respectively abutted on the four sets of U-shaped short pipes 7 between the two sets of opposite side steel plate structures. The semicircular U-shaped short pipe 7 wraps a part of the bottom of the steel pipe, thereby forming an effective horizontal connection structure, connecting the steel plates supporting the outer foundation pit on the left and right sides into a collaborative whole, effectively resisting the horizontal thrust and shear force from the side of the foundation pit, and providing reliable lateral support for the foundation pit. Example 2

[0028] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working methods. Figures 1 to 6 As shown, see the following description for details:

[0029] As a preferred embodiment, the two groups of upper butt joints 3 are bent toward the side away from the connecting plate 4, and the two groups of upper butt joints 3 are mirror-set. Furthermore, when workers are installing multiple layers of steel plates, they can quickly and accurately install the upper steel plates in the gaps left by the mirror-set settings between the upper butt joints 3 based on this obvious and standardized bending shape, without the need for complex measurement and calibration tools, effectively saving construction time.

[0030] As a preferred embodiment, the front and rear end faces of the connecting plate 4 are welded to the front connecting steel plate 1 and the rear connecting steel plate 2 respectively. The front connecting steel plate 1 and the rear connecting steel plate 2 are symmetrically arranged, and a gap of 1.2 times the thickness of the steel plate is left between the front connecting steel plate 1 and the rear connecting steel plate 2 for the steel plate to be inserted; further, the front connecting steel plate 1 and the rear connecting steel plate 2 are symmetrically arranged and a gap of 1.2 times the thickness of the steel plate is reserved, and such a gap is also left with the upper docking joint 3, thereby providing a convenient and precise space for the insertion of the upper steel plate. When the multi-layer steel plate support system is constructed, the upper steel plate can be accurately inserted into the gap, and since the gap is a reasonable multiple set according to the thickness of the steel plate, it can not only ensure the smooth insertion process, but also form a tight fit between the inserted steel plate and the steel plate structure to avoid excessive shaking or loosening.

[0031] As a preferred embodiment, the left lap joint 5 is bent toward the side away from the right lap joint 6, and the right lap joint 6 is bent toward the side away from the left lap joint 5; further, when multiple steel plates are spliced horizontally, the bending direction can ensure a tight and stable overlap between adjacent steel plates. When the left lap joint 5 of a steel plate structure is spliced with the right lap joint 6 of another steel plate structure, this specific bending shape allows them to naturally nest with each other in the horizontal direction, like a mortise and tenon structure, greatly increasing the overlap area and enhancing the stress resistance effect.

[0032] As a preferred embodiment, the length of the two sets of upper butt joints 3 is set to 25 cm, the height of the left lap joint 5 and the right lap joint 6 is set to 20 cm, and the length of the two sets of U-shaped short tubes 7 is 10 cm; further, through this standard size and specific length of bent lap edges, lap parts and reserved steel plate gaps, the steel plate can be used in foundation pit support projects of different scales and requirements.

[0033] As a preferred embodiment, lifting holes 8 are opened on the top of the two groups of U-shaped short tubes 7, and the two groups of lifting holes 8 are symmetrically arranged; furthermore, at the construction site, the construction personnel only need to simply connect the lifting rope of the lifting equipment with the lifting hole 8 to start the lifting operation smoothly.

[0034] The working process of the utility model is as follows: first, when the foundation pit support is started, the front connecting steel plate 1 is formed into a group of steel plate structures through the connecting plate 4 and the rear connecting steel plate 2, and the lifting rope on the crane is simply connected to the lifting hole 8 on the front connecting steel plate 1, so as to lift and insert the shaped steel plate structure between the steel pipe pile and the soil. When the upper steel plate is installed, the gap formed between the two groups of upper butt joints 3 on the front connecting steel plate 1 and the rear connecting steel plate 2 is inserted for limiting, and the upper end of the middle connecting plate 4 is pressed against. Subsequently, when multiple steel plate structures need to be spliced horizontally, the left lap joint 5 and the right lap joint 6 are bent in opposite directions to each other, so as to ensure that the adjacent steel plate structures are tightly and firmly overlapped. When the left lap joint 5 of one steel plate structure is spliced with the right lap joint 6 of another steel plate structure like a mortise and tenon structure, the soil is filled between the rear of the steel plate structure and the foundation pit. Through the joint action of the steel plate structure and the steel pipe pile, the foundation pit is no longer at risk of collapse, and the size of the steel plate structure is uniform and standardized.

[0035] When multiple sets of steel plate structures need to be installed and are on opposite sides, the two ends of two sets of steel pipes of the same length can be respectively abutted against the four sets of U-shaped short tubes 7 between the two sets of opposite side steel plate structures. The semicircular U-shaped short tubes 7 wrap a part of the bottom of the steel pipe, thereby forming an effective transverse connection structure, connecting the steel plates supporting the outer foundation pit on the left and right sides into a coordinated whole, providing reliable lateral support for the foundation pit. The above is the working principle of the steel plate used for foundation pit support.

Claims

1. A steel plate for foundation pit support, comprising a front connecting steel plate (1), an upper butt joint (3), a left lap joint (5), a right lap joint (6) and a U-shaped short tube (7), characterized in that: A rear connecting steel plate (2) is provided behind the front connecting steel plate (1), the upper butt joint (3) is provided at the upper ends of the front connecting steel plate (1) and the rear connecting steel plate (2), respectively, and a connecting plate (4) is provided on the opposite sides of the front connecting steel plate (1) and the rear connecting steel plate (2); The left lap joint (5) is arranged on the left side of the connecting plate (4), the right lap joint (6) is arranged on the right side of the connecting plate (4), and the U-shaped short tubes (7) are respectively welded on both sides of the front end surface of the front connecting steel plate (1), and the two groups of U-shaped short tubes (7) are symmetrically arranged.

2. The steel plate for foundation pit support according to claim 1, characterized in that: The two groups of upper butt joints (3) are bent toward a side away from the connecting plate (4), and the two groups of upper butt joints (3) are arranged in a mirror image.

3. The steel plate for foundation pit support according to claim 1, characterized in that: The front and rear end surfaces of the connecting plate (4) are welded to the front connecting steel plate (1) and the rear connecting steel plate (2) respectively. The front connecting steel plate (1) and the rear connecting steel plate (2) are symmetrically arranged. A gap of 1.2 times the thickness of the steel plate is left between the front connecting steel plate (1) and the rear connecting steel plate (2) for the steel plate to be inserted.

4. The steel plate for foundation pit support according to claim 1, characterized in that: The left lap joint (5) is bent toward a side away from the right lap joint (6), and the right lap joint (6) is bent toward a side away from the left lap joint (5).

5. The steel plate for foundation pit support according to claim 2, characterized in that: The lengths of the two sets of upper butt joints (3) are both set to 25 cm, the heights of the left lap joint (5) and the right lap joint (6) are both set to 20 cm, and the lengths of the two sets of U-shaped short tubes (7) are 10 cm.

6. The steel plate for foundation pit support according to claim 5, characterized in that: The upper sides of the two groups of U-shaped short tubes (7) are both provided with hanging holes (8), and the two groups of hanging holes (8) are symmetrically arranged.

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