Anti-inclination foundation pit steel sheet support pile

Abstract

The utility model relates to a kind of anti-inclination foundation pit steel sheet support pile, belong to foundation pit supporting engineering technical field.The recessed steel sheet pile both sides are equipped with L-shaped plate, each L-shaped plate is surrounded with adjacent recessed steel sheet pile outer wall to form clamping groove, recessed steel sheet pile one end surface is fixedly connected with sliding plate, sliding plate is equipped with sliding groove one along length direction, sliding groove one is slidably connected with reinforcing mechanism, recessed steel sheet pile both sides are uniformly equipped with corresponding bolt hole from top to bottom.The utility model is provided with precise initial implantation design, stable adjacent connecting structure, flexible adjustable reinforcing mechanism and efficient overall stress dispersion system, which solves the problems of initial inclination, loose connection, poor adaptability and other problems in foundation pit supporting, and improves the anti-inclination ability and reliability of supporting structure from multiple dimensions, provides stable and safe support protection for foundation pit excavation construction, and has practicality and economy.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support engineering technology, specifically a steel sheet support pile for anti-tilting foundation pit. Background Technology

[0002] In the construction of foundation pits in building engineering, municipal engineering, and other fields, support structures are usually required to ensure the stability of the surrounding soil and prevent the pit from collapsing or deforming. Steel sheet piles are widely used in various foundation pit support projects due to their advantages such as convenient construction and high strength.

[0003] However, existing sheet pile supports for foundation pits still have certain shortcomings in practical use. Due to factors such as uneven distribution of soil pressure around the foundation pit, deviations in pile insertion angle during construction, and external load disturbances, sheet piles are prone to tilting. Once the sheet piles tilt, it will not only reduce the overall stability of the support structure and affect the safety of foundation pit construction, but may also lead to serious problems such as ground settlement in the surrounding area and cracking of adjacent buildings, posing significant safety hazards and economic losses to the project.

[0004] Currently, to address the tilting issue of sheet piles, the industry typically employs methods such as increasing the pile insertion depth, installing temporary supports, or reinforcing the surrounding soil. However, increasing the pile insertion depth significantly increases construction costs and difficulty; installing temporary supports occupies construction space within the foundation pit, affecting construction efficiency; and reinforcing the surrounding soil requires additional construction procedures and materials, with the reinforcement effect difficult to control precisely. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model provides a steel sheet support pile for anti-tilting foundation pits.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a steel sheet pile for anti-tilting foundation pit, comprising a concave steel sheet pile, a sliding plate, a reinforcement mechanism, two L-shaped plates and multiple bolt holes;

[0007] Both sides of the concave sheet pile are provided with L-shaped plates. Each L-shaped plate and the outer wall of the adjacent concave sheet pile form a groove. One end face of the concave sheet pile is fixedly connected to the sliding plate. The sliding plate is provided with a sliding groove along the length direction. The sliding groove is slidably connected to the reinforcement mechanism. Corresponding bolt holes are evenly distributed on both sides of the concave sheet pile from top to bottom.

[0008] The reinforcement mechanism includes a slider, a threaded rod one, a sleeve, an internal threaded sleeve, a threaded rod two, and a threaded tip.

[0009] The slider is slidably connected to the slide groove on the slide plate. The slider is provided with a threaded hole, which is threadedly connected to a threaded rod. The slider is hinged to one end of the sleeve. The other end of the sleeve is rotatably connected to an inner threaded sleeve through a bearing. The inner threaded sleeve is threadedly connected to a threaded rod. One end of the threaded rod is slidably limited inside the sleeve, and the other end of the threaded rod is fixedly connected to a threaded tip.

[0010] The sleeve is fixed with a limiting protrusion, and the outer wall of the threaded rod is provided with a sliding groove along the length direction. The sliding groove and the limiting protrusion are slidably limited.

[0011] The threaded rod is fixedly connected to the rubber pad, which is used in conjunction with the inner bottom surface of the slide groove on the slide plate. By tightening the threaded rod, the rubber pad can be pressed against the inner bottom surface of the slide groove, thereby locking the position of the slider within the slide groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. High initial implantation accuracy, effectively avoiding tilting risks: Concave steel sheet piles are implanted into the soil layer using a suitable vibratory pile driver. High-frequency vibration liquefies the soil particles around the concave steel sheet piles, significantly reducing the friction between the soil and the pile body, ensuring that the concave steel sheet piles are implanted in a vertical posture. At the same time, relying on the rigid structure of the concave steel sheet piles themselves, they can initially resist the lateral pressure of shallow soil, avoiding initial tilting from the construction source and preventing risks to subsequent support.

[0014] 2. The adjacent piles are firmly connected, with both displacement resistance and seepage prevention functions: The adjacent concave steel sheet piles adopt a 180° rotationally symmetrical distribution design. The L-shaped plate and the groove formed by the pile body achieve precise interlocking, which can limit the horizontal displacement of the pile body and prevent a single pile from shifting due to soil pressure. Moreover, the interlocking structure can fill the gaps between the piles, reduce soil seepage outside the foundation pit, and at the same time, the bolt connection with the bolt holes forms a double fixation, further locking the relative position of the adjacent piles and enhancing the lateral stiffness of the overall support structure.

[0015] 3. The reinforcement mechanism is highly adaptable and can flexibly cope with changes in the excavation depth of the foundation pit: The slider in the reinforcement mechanism can slide along the slide groove one, and the position is locked by the cooperation of the threaded rod one and the rubber pad. Combined with the adjustment of the tilt angle by the sleeve hinge and the extension and retraction adjustment of the inner threaded sleeve and the threaded rod two, the support height of the slider and the extension length of the threaded rod two can be quickly adjusted according to the changes in the excavation depth of the foundation pit, so that the thread tip can be driven into the stable soil layer at the corresponding depth, ensuring that effective anti-tilting support can be provided at different excavation stages without the need to disassemble and reassemble the support structure, thus improving construction efficiency.

[0016] 4. High reliability of the support structure and significant anti-loosening effect: In the reinforcement mechanism, the rubber pad increases the friction with the inner bottom surface of the groove by means of its elasticity, which can stably lock the position of the slider and prevent the slider from loosening due to soil vibration or pressure changes; at the same time, the limiting protrusion in the sleeve cooperates with the groove of the threaded rod to restrict the threaded rod from rotating with the inner threaded sleeve, and only realize linear extension and contraction, ensuring that the thread tip accurately penetrates into the stable soil layer, ensuring the stable transmission of the inclined support force, avoiding the failure of the support structure, and thus preventing the concave steel sheet pile from tilting due to lateral force imbalance.

[0017] 5. The overall support system has outstanding anti-tilting capacity, ensuring the safety of foundation pit construction: Through the interlocking of slots and the fixing of bolts, a continuous rigid support system is formed, which can distribute the lateral pressure borne by a single concave steel sheet pile to the entire support structure, significantly reducing the stress load on a single pile; combined with the diagonal support of the reinforcement mechanism, the overall anti-tilting performance is improved from both lateral constraint and diagonal support aspects, effectively resisting the impact of soil settlement, vibration and other factors on the support system, and ensuring the structural stability during the foundation pit excavation process.

[0018] In summary, this utility model, through precise initial implantation design, stable adjacent connection structure, flexible and adjustable reinforcement mechanism, and efficient overall stress distribution system, not only solves the problems of initial tilting, loose connection, and poor adaptability in foundation pit support, but also improves the anti-tilting ability and reliability of the support structure from multiple dimensions, providing stable and safe support for foundation pit excavation construction, and combining practicality and economy. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention;

[0020] Figure 2 This is the left view of this utility model;

[0021] Figure 3 This is a schematic diagram showing the connection relationship between the threaded rod II and the limiting protrusion of this utility model;

[0022] Figure 4 This is a schematic diagram of the usage state of this utility model. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] This embodiment describes a steel sheet pile for preventing tilting of a foundation pit, including a concave steel sheet pile 1, a sliding plate 3, a reinforcement mechanism, two L-shaped plates 2 and multiple bolt holes 10;

[0025] Both sides of the concave sheet pile 1 are provided with L-shaped plates 2. Each L-shaped plate 2 and the outer wall of the adjacent concave sheet pile 1 form a groove. One end face of the concave sheet pile 1 is fixedly connected to the sliding plate 3. The sliding plate 3 is provided with a sliding groove along the length direction. The sliding groove is slidably connected to the reinforcement mechanism. The two side walls of the concave sheet pile 1 are provided with corresponding bolt holes 10 from top to bottom.

[0026] The reinforcement mechanism includes a slider 4, a threaded rod 1 5, a sleeve 6, an internal threaded sleeve 7, a threaded rod 2 8, and a threaded tip 9;

[0027] The slider 4 is slidably connected to the slide groove on the slide plate 3. The slider 4 is provided with a threaded hole, which is threadedly connected to the threaded rod 5. The slider 4 is hinged to one end of the sleeve 6. The other end of the sleeve 6 is rotatably connected to the inner threaded sleeve 7 through a bearing. The inner threaded sleeve 7 is threadedly connected to the threaded rod 8. One end of the threaded rod 8 is slidably limited inside the sleeve 6, and the other end of the threaded rod 8 is fixedly connected to the threaded tip 9.

[0028] The sleeve 6 is fixed with a limiting protrusion 11, and the outer wall of the threaded rod 8 is provided with a sliding groove 2 along the length direction. The sliding groove 2 is slidably limited by the limiting protrusion 11.

[0029] The threaded rod 5 is fixedly connected to the rubber pad 12. The rubber pad 12 is used in conjunction with the inner bottom surface of the slide groove on the slide plate 3. By tightening the threaded rod 5, the rubber pad 12 can be pressed against the inner bottom surface of the slide groove, thereby locking the position of the slider 4 in the slide groove.

[0030] When using this utility model, firstly, according to the design requirements of the foundation pit support, a vibratory pile driver adapted to the design depth of the support pile is used to vertically drive the concave steel sheet pile 1 into the foundation pit soil layer. The high-frequency vibration of the vibratory pile driver can liquefy the soil particles around the concave steel sheet pile 1, greatly reducing the friction force of the soil on the pile body, ensuring that the concave steel sheet pile 1 is implanted in a vertical posture, avoiding the initial implantation tilt from causing hidden dangers for subsequent support. At the same time, the rigid structure of the concave steel sheet pile 1 itself can initially resist the lateral pressure of the shallow soil.

[0031] Next, the concave sheet pile 1 of another support pile is also vertically inserted. Before insertion, the two adjacent concave sheet piles 1 need to be adjusted to be symmetrically distributed at 180° rotation, so that the groove formed by the L-shaped plates 2 on both sides of the concave sheet pile 1 of the previous support pile and the pile body can be precisely engaged with the L-shaped plates 2 of the concave sheet pile 1 of the next support pile and the outer wall of the pile body. This interlocking structure can limit the left and right displacement of the adjacent concave sheet piles 1 in the horizontal direction, avoid the single pile from shifting due to soil pressure, and the L-shaped plates 2 after engagement can fill the gap between the adjacent pile bodies, reduce soil leakage outside the foundation pit and enhance the lateral stiffness of the overall support structure.

[0032] Then, based on the insertion depth of the concave sheet pile 1 of each support pile, push the corresponding slider 4 along the groove of the sliding plate 3 to the appropriate support position, and then rotate the threaded rod 5. Because the threaded rod 5 is threadedly engaged with the threaded hole on the slider 4, it will push the rubber pad 12 until the rubber pad 12 is tightly attached to the inner bottom surface of the groove. The increased friction due to the elasticity of the rubber pad 12 locks the position of the slider 4, preventing the slider 4 from loosening due to subsequent soil vibration or pressure changes. Then, according to the distribution of the foundation pit soil layers and the support requirements, rotate the hinge with the slider 4. The inclination angle of the sleeve 6 is adjusted so that the threaded rod 8 tilts towards the soil layer. Then, the internal threaded sleeve 7, which is connected to the sleeve 6 via a bearing, is rotated. Utilizing the threaded engagement between the internal threaded sleeve 7 and the threaded rod 8, the threaded rod 8 is pushed out along the sleeve 6. At this time, the limiting protrusion 11 inside the sleeve 6 engages with the sliding groove 2 of the threaded rod 8, restricting the threaded rod 8 from rotating with the internal threaded sleeve 7 and limiting it to only linear extension and contraction. This ensures that the threaded tip 9 accurately penetrates the stable soil layer, forming an oblique support force, thereby preventing the concave sheet pile 1 from tilting. Finally, the two adjacent concave sheet piles are aligned. The bolt holes 10 on both sides of the sheet pile 1 are used to insert high-strength bolts of the appropriate specifications and nuts, forming a double-fixed connection between the bolts and the slots. The bolts further lock the relative positions of adjacent piles, preventing loosening of the slots due to long-term soil settlement or vibration. Simultaneously, multiple concave sheet piles 1 form a continuous rigid support structure, distributing the lateral pressure borne by a single pile to the entire support structure, significantly improving the overall anti-tilting capacity and ensuring the stability of the support system during excavation. When the excavation depth changes... The threaded rod 5, located on the concave steel sheet pile 1 inside the foundation pit, can be rotated to release the locking of the slider 4 by the rubber pad 12. After sliding the slider 4 to the support height that matches the new excavation depth, the threaded rod 5 is tightened again to lock the position. At the same time, the inner threaded sleeve 7 is rotated to adjust the extension length of the threaded rod 8, so that the threaded tip 9 is inserted into the stable soil layer at the corresponding depth (it is necessary to ensure that the threaded tip 9 is fully embedded in the stable soil layer (such as clay layer, sandstone layer) and avoid inserting into the loose backfill soil), so as to ensure that effective anti-tilting support can be provided at different excavation stages.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A type of anti-tilting foundation pit steel sheet support pile, characterized in that: It includes concave sheet piles (1), sliding plate (3), reinforcement mechanism, two L-shaped plates (2) and multiple bolt holes (10); The concave sheet pile (1) is provided with L-shaped plates (2) on both sides. Each L-shaped plate (2) and the outer wall of the adjacent concave sheet pile (1) form a groove. One end face of the concave sheet pile (1) is fixedly connected to the sliding plate (3). The sliding plate (3) is provided with a sliding groove one along the length direction. The sliding groove one is slidably connected to the reinforcement mechanism. The two sides of the concave sheet pile (1) are provided with corresponding bolt holes (10) from top to bottom. The reinforcement mechanism includes a slider (4), a threaded rod one (5), a sleeve (6), an internal threaded sleeve (7), a threaded rod two (8), and a threaded tip (9). The slider (4) is slidably connected to the slide groove on the slide plate (3). The slider (4) is provided with a threaded hole, which is threadedly connected to the threaded rod (5). The slider (4) is hinged to one end of the sleeve (6). The other end of the sleeve (6) is rotatably connected to the inner threaded sleeve (7) through a bearing. The inner threaded sleeve (7) is threadedly connected to the threaded rod (8). One end of the threaded rod (8) is slidably limited inside the sleeve (6), and the other end of the threaded rod (8) is fixedly connected to the threaded tip (9).

2. The anti-tilting foundation pit steel sheet support pile according to claim 1, characterized in that: The sleeve (6) is fixed with a limiting protrusion (11), and the outer wall of the threaded rod (8) is provided with a sliding groove (2) along the length direction. The sliding groove (2) and the limiting protrusion (11) are slidably limited.

3. The anti-tilting foundation pit steel sheet support pile according to claim 1, characterized in that: The threaded rod (5) is fixedly connected to the rubber pad (12). The rubber pad (12) is used in conjunction with the inner bottom surface of the slide groove on the slide plate (3). By tightening the threaded rod (5), the rubber pad (12) can press against the inner bottom surface of the slide groove, thereby locking the position of the slider (4) in the slide groove.

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