Small and medium-sized bearing platform supporting device under soft stratum condition

Abstract

The utility model discloses a small and medium-sized bearing platform supporting device under the soft stratum condition, and aims to solve the problems caused by bottom soil body settlement in traditional bearing platform construction. The device comprises Larsen steel sheet piles, a fixing plate, a dowel bar, a stress bar and the like. The Larsen steel sheet piles are connected with one another around the side line of the bearing platform, the fixing plate is fixed to the plate faces of the Larsen steel sheet piles, the dowel bar is inserted into the fixing plate and connected with the stress bar, and the dead weight and stress are transmitted to the fixing plate and the Larsen steel sheet piles. A pull ring is arranged at the top of the fixing plate and can provide upward external force or pull out a hanging ring of the Larsen steel sheet pile and the fixing plate. The device can provide side support and bottom support, effectively reduce the harm caused by bottom soft stratum settlement during bearing platform construction, save the construction cost, and improve the construction efficiency and quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit support for caps, in particular to a small and medium-sized cap support device under soft stratum conditions. Background Art

[0002] In construction projects, especially in soft soil conditions, the construction of small and medium-sized caps often faces the problem of soil settlement. During the construction of the cap, since the pile foundation cannot effectively provide support for the cap steel bars and concrete, the deadweight of the cap may crush the bottom concrete cushion and soil, causing the cap elevation and structure to deviate. Traditional cap construction methods have certain limitations in soft strata. For example, the bottom soil needs to be replaced to increase the support force, but this method is not only time-consuming and labor-intensive, but may not completely solve the problems caused by soil settlement. In order to meet the challenges of small and medium-sized cap construction in soft soil conditions, a new support device is needed that can provide additional support for the bottom of the cap while providing support on the side to reduce the impact of soil settlement.

[0003] Among the existing solutions, support structures such as steel sheet piles are often used, but most of them focus on providing side support and cannot solve the problem of insufficient soil support under soft strata. Therefore, it is necessary to propose a new type of small and medium-sized cap support device that can not only effectively provide side support, but also increase the support force at the bottom of the cap under soft strata conditions, thereby reducing the impact of soil settlement and improving the efficiency and quality of cap construction. Utility Model Content

[0004] The purpose of the utility model is to provide a medium- and small-sized foundation support device under soft stratum conditions to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small and medium-sized pedestal support device under soft stratum conditions, comprising: Larsen steel sheet piles, a plurality of Larsen steel sheet piles, which are connected to each other and arranged on the outside of the pedestal; a fixing plate is provided on the Larsen steel sheet pile, a plurality of fixing rings are provided on the fixing plate, a connecting plate 2 is provided on the upper part of the fixing plate, a force transmission rod can be inserted into the fixing plate through the fixing ring, the force transmission rod is connected to the connecting plate 2 through the connecting bolt 1, the connecting plate 1 is connected to the force transmission rod through the connecting bolt 3, and the force bearing rod is connected to the connecting plate 1 through the connecting bolt 2.

[0006] In the present solution, a pull ring (21) is provided on the top of the fixing plate (2).

[0007] In this solution, the size of the force transmission rod (3) matches that of the fixing ring (22).

[0008] In the present solution, the connecting plate 1 (4) is an L-shaped steel plate.

[0009] In this solution, the two ends of the force-bearing rod (5) are respectively connected to two connecting plates (4).

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a new solution for the construction of the pedestal under soft stratum conditions. While supporting the sides of the pedestal foundation pit, additional supporting force is applied to the bottom of the pedestal, eliminating the process of replacing the soil at the bottom of the pedestal, and increasing the efficiency and quality of the pedestal construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the fixed plate portion of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the force transmission rod part of the utility model;

[0014] Figure 4 It is a top view of the utility model;

[0015] Figure 5 A partial top view of the utility model

[0016] Among them: 1. Larsen steel plate, 2. Fixed plate, 3. Force transmission rod, 4. Connecting plate one, 5. Force bearing rod, 21. Pull ring, 22. Fixed ring, 23. Connecting plate two, 31. Connecting bolt one, 41. Connecting bolt two, 42. Connecting bolt three. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 , a specific implementation of the utility model is:

[0019] like Figure 1As shown, a small and medium-sized pedestal support device for soft stratum conditions includes Larsen steel sheet piles 1, which are interconnected around the outer contour of the pedestal, a fixing plate 2 is fixed on the plate surface of the Larsen steel sheet pile 1, a force transmission rod 3 can be inserted and fixed on the fixing plate 2, and is connected to the force rod through a connecting plate 4, a template is laid on the force rod for pedestal construction, and the deadweight of the pedestal steel bar and concrete will be transmitted to the force transmission rod 3 through the force rod 5, and further transmitted to the fixing plate 2 and the Larsen steel sheet pile 1, thereby reducing the damage caused by the settlement of the bottom soft stratum during the pedestal construction.

[0020] like Figure 2 , Figure 3 As shown, a pull ring 21 is provided on the top of the fixing plate 2. The pull ring 21 can be used as an auxiliary tool to provide an upward external force to offset the deadweight of the foundation during the construction of the foundation. It can also be used as a lifting ring for pulling out the Larsen steel sheet pile 1 and the fixing plate 2 after the construction of the foundation is completed. A plurality of fixing rings 22 are provided on the fixing plate 2, and the force transfer rod 3 can be inserted along the fixing ring 22 so that it does not move. A connecting plate 23 is provided on the upper part of the fixing plate 2, and a bolt hole is provided on the connecting plate 23. When the force transfer rod 3 is inserted into the fixing ring 22 to a suitable height, a connecting bolt 31 is used to connect the force transfer rod 3 and the connecting plate 23.

[0021] like Figure 3 , Figure 4 , Figure 5 As shown, the connecting plate 1 4 is an L-shaped steel plate with multiple bolt holes. One side is connected to the force transmission rod through a connecting bolt 3 42, and the other side is connected to the force bearing rod 5 through a connecting bolt 2 41. Both ends of the force bearing rod 5 are simultaneously connected to the connecting plates 1 4 on both sides of the pedestal to form a stable force-bearing structure.

[0022] In this embodiment, a plurality of Larsen steel sheet piles 1 are used as the supporting structure of the pedestal, and a steel plate with a height matching that of the Larsen steel sheet pile 1 is welded on the web of the Larsen steel sheet pile 1 with the bowl mouth facing inward as a fixing plate 2, a plurality of U-shaped steel plates are welded on the fixing plate 2 as a fixing ring 22, and a small rectangular steel plate is welded on the upper part of the fixing plate 2 as a connecting plate 23, and bolt holes are opened on the connecting plate 23.

[0023] Draw the edge line of the foundation on the ground, insert the Larsen steel sheet pile 1 along the outer edge line and connect it as a whole, and then excavate the soil inside the Larsen steel sheet pile 1. When the soil is excavated to the designed elevation, clean the fixed plate 2, use a square tube with a size matching the fixed ring 22 as the force transfer rod 3 to insert it into the fixed ring 22, ensure that the force transfer rod 3 does not shake in the fixed ring 22, open bolt holes at the corresponding positions of the top and bottom of the force transfer rod 3, and use the connecting bolt 1 31 to fix the force transfer rod 3 to the connecting plate 2 23. Use the connecting bolt 3 42 to fix the connecting plate 1 4 to the force transfer rod 3, and then use the connecting bolt 2 41 to fix the two ends of the force rod 5 to the two connecting plates 1 4 on both sides of the foundation, and choose to set the force rod 5 in a position avoiding the pile head of the pile foundation.

[0024] The base formwork is laid above the load-bearing rod 5, and the steel bars are tied. After the steel bars are tied, a steel pipe with a length greater than the distance between the Larsen steel sheet piles 1 on both sides of the base is used to pass through the opposite pull rings 21, so that both sides of the steel pipe are fixed on the ground around the base to provide an upward external force for the pull rings 21.

[0025] Pour the cap concrete, and when the concrete stress reaches the design requirements, remove the steel pipe on the pull ring 21, remove the connecting bolt 31, and pull out the Larsen steel sheet pile 1 for subsequent construction. When there is no removal condition, the force transmission rod 3, the connecting plate 4 and the force rod 5 can be left in the soil outside the cap, and the pulled out Larsen steel sheet pile 1 and the fixed plate 2 and related structures can be reused.

[0026] The utility model proposes a small and medium-sized pedestal support device for soft stratum conditions. While providing side support for pedestal excavation, it also provides additional support for the bottom of the pedestal to cope with the settlement problem during pedestal construction caused by insufficient supporting force of the soil at the bottom of the pedestal under soft stratum conditions. This eliminates the process of replacing the soil at the bottom of the pedestal during pedestal construction under soft stratum conditions, and provides a new solution to the pedestal construction situation where replacement of the soil cannot solve the settlement problem.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small and medium-sized cap support device for soft formation conditions. It is characterized in that include: A Larsen steel sheet pile (1), wherein the Larsen steel sheet pile (1) has a plurality of pieces connected to each other and arranged on the outer side of a foundation, the Larsen steel sheet pile (1) is provided with a fixing plate (2), the fixing plate (2) is provided with a plurality of fixing rings (22), a connecting plate 2 (23) is provided on the upper part of the fixing plate (2), a force transmission rod (3) can be inserted into the fixing plate (2) through the fixing ring (22), the force transmission rod (3) is connected to the connecting plate 2 (23) through a connecting bolt 1 (31), a connecting plate 1 (4) is connected to the force transmission rod (3) through a connecting bolt 3 (42), and a force bearing rod (5) is connected to the connecting plate 1 (4) through a connecting bolt 2 (41).

2. A medium-sized and small-sized cap support device for soft formation conditions according to claim 1, It is characterized in that A pull ring (21) is provided on the top of the fixing plate (2).

3. A medium-sized and small-sized cap support device for soft strata according to claim 1, It is characterized in that The size of the force transmission rod (3) matches that of the fixing ring (22).

4. A medium-sized and small-sized cap support device for soft formation conditions according to claim 1, It is characterized in that The connecting plate 1 (4) is an L-shaped steel plate.

5. A medium-sized and small-sized cap support device for soft formation conditions according to claim 1, It is characterized in that The two ends of the force-bearing rod (5) are respectively connected to two connecting plates (4).

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