Combined supporting structure of steel sheet piles and prefabricated pipe piles

Abstract

The utility model provides a combined supporting structure of a steel sheet pile and a prefabricated pipe pile, which belongs to the technical field of foundation pit engineering, and comprises a prefabricated pipe pile, a steel pipe pile and a steel sheet pile which are sequentially arranged from near to far from a foundation pit side and are all inserted into a soil body. And a combined supporting structure is formed by the support and the soil body. The mode that the steel pipe pile is inserted into the soil body is adopted, the structure between the steel plate pile and the prefabricated pipe pile is protected, before the steel plate pile is pulled out, the prefabricated pipe pile, the steel pipe pile, the steel plate pile and the soil body among the prefabricated pipe pile, the steel pipe pile and the steel plate pile form a whole, and the overall strength and stability of the supporting structure are improved; and when the steel sheet pile needs to be pulled out, the prefabricated pipe pile, the steel pipe pile and the soil body still form an integral combined supporting structure, so that the strength and the stability of the steel sheet pile after being pulled out are ensured, and the safety is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit engineering, and specifically relates to a combined supporting structure of steel sheet piles and prefabricated pipe piles. Background Art

[0002] During the excavation of foundation pits for construction projects, steel sheet piles are often used to protect the foundation pits. Steel sheet piles are a type of steel with a lock. Their cross-sections include straight plates, grooves, and Z shapes. They are available in various sizes and interlocking forms to form cofferdams of various shapes as needed, and can be reused many times. However, on the one hand, after the steel sheet piles are installed, the outer soil will exert a certain pressure on the steel sheet piles, causing the steel sheet piles to tilt toward the foundation pit, so support structures are required to support the steel sheet piles to prevent them from collapsing. On the other hand, when the steel sheet piles are removed, the outer soil will exert pressure on the newly poured reinforced concrete structure at the foundation pit. At the same time, due to the disturbance of the soil, it will also have a certain impact on the support structure outside the original foundation pit, which will have an adverse effect on the construction quality and safety of the foundation pit project. Utility Model Content

[0003] In order to solve the above problems of the prior art, the utility model provides a combined support structure of steel sheet piles and prefabricated pipe piles, aiming to add a protection and support device between the steel sheet piles and the prefabricated pipe piles. The device forms a combined structure with the prefabricated pipe piles and the soil, thereby enhancing the stability of the soil and improving the strength of the support structure.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A combined support structure of steel sheet piles and prefabricated pipe piles comprises prefabricated pipe piles, steel pipe piles and steel sheet piles, wherein the steel sheet piles, steel pipe piles and prefabricated pipe piles are arranged in sequence from near to far from the foundation pit side, and the steel sheet piles, steel pipe piles and prefabricated pipe piles are all inserted into the soil and form a combined support structure together with the soil.

[0006] Furthermore, the steel pipe pile includes a plurality of steel pipes, and the plurality of steel pipes are inserted into the soil to a preset first depth.

[0007] Furthermore, some of the steel pipes have preset pipe diameters and wall thicknesses.

[0008] Furthermore, the plurality of steel pipes are arranged in double rows in an alternating manner.

[0009] Furthermore, a plurality of the steel pipes are arranged in a plum blossom shape.

[0010] Furthermore, the prefabricated pipe piles are arranged in succession at intervals, and the steel sheet piles are arranged in succession.

[0011] Furthermore, the prefabricated pipe piles are rubbed into the soil to a preset second depth, and the steel sheet piles are inserted into the soil to a preset third depth.

[0012] Furthermore, the second depth>first depth≥third depth.

[0013] Furthermore, there is a preset first distance between the steel pipe pile and the prefabricated pipe pile, and there is a preset second distance between the steel pipe pile and the steel sheet pile.

[0014] Furthermore, the first distance is smaller than the second distance.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] 1. The utility model adopts the method of inserting steel pipe piles into the soil to protect the structure between the steel sheet piles and the prefabricated pipe piles. Before the steel sheet piles are removed, the prefabricated pipe piles, the steel pipe piles, the steel sheet piles and the soil between the three form a whole, which improves the overall strength and stability of the support structure; when the steel sheet piles need to be removed, the prefabricated pipe piles, the steel pipe piles and the soil still form an integrated combined support structure, which ensures the strength and stability after the steel sheet piles are removed and enhances safety;

[0017] 2. Through the support structure formed by double-row or plum-shaped multiple-row steel pipes and soil layers, the soil layer on one side of the foundation pit excavation forms a buffer zone, providing protection for the subsequent earthwork excavation;

[0018] 3. The steel pipes that are close to the prefabricated pipe piles can be used as a later structure to be connected to the prefabricated pipe piles as a whole, forming support for the reinforced concrete structure that needs to be constructed after the foundation pit excavation is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A plan view of a combined support structure of steel sheet piles and prefabricated pipe piles according to an embodiment of the utility model;

[0020] Figure 2 This is a side view of a combined support structure of steel sheet piles and prefabricated pipe piles according to an embodiment of the utility model.

[0021] In the figure:

[0022] 1- Prefabricated pipe piles, 2- Steel pipe piles, 3- Steel pipes, 4- Steel sheet piles, 5- Soil, 6- Foundation pit. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In order to better understand the purpose, structure and function of the utility model, the combined support structure of a steel sheet pile and a prefabricated pipe pile of the utility model is described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1-Figure 2 As shown, the utility model provides a combined support structure of steel sheet piles and prefabricated pipe piles, including prefabricated pipe piles 1, steel pipe piles 2 and steel sheet piles 4, wherein the steel sheet piles 4, steel pipe piles 2 and prefabricated pipe piles 1 are arranged in sequence from near to far from the foundation pit side, and the steel sheet piles 4, steel pipe piles 2 and prefabricated pipe piles 1 are all inserted into the soil 5, and together with the soil 5 form a combined support structure.

[0029] Furthermore, the steel pipe pile 2 includes a plurality of steel pipes 3 , and the plurality of steel pipes 3 are inserted into the soil 5 to a preset first depth.

[0030] Furthermore, the plurality of steel pipes 3 have a preset pipe diameter and wall thickness.

[0031] Furthermore, in some preferred implementation schemes of this embodiment, a plurality of the steel pipes 3 are arranged in a double-row staggered arrangement, and through the double-row staggered arrangement, the steel pipes 3 are tightly combined with the soil 5 .

[0032] Furthermore, the prefabricated pipe pile 1 is rubbed into the soil 5 to a preset second depth, and the steel sheet pile 4 is inserted into the soil 5 to a preset third depth.

[0033] Furthermore, the second depth>the first depth≥the third depth. By setting different insertion depths, the lateral force performance of the prefabricated pipe pile 1 is greater than the lateral force performance of the steel pipe pile 2, and the lateral force performance of the steel pipe pile 2 is greater than the lateral force performance of the steel sheet pile 4, so that the steel pipe pile 2 can replace the steel sheet pile 4 as a supporting structure to protect the foundation pit 6.

[0034] Furthermore, the prefabricated pipe piles 1 are arranged continuously at intervals, and the steel sheet piles 4 are arranged continuously.

[0035] Furthermore, there is a preset first distance between the steel pipe pile 2 and the prefabricated pipe pile 1 , and there is a preset second distance between the steel pipe pile 2 and the steel sheet pile 4 .

[0036] Furthermore, the first distance is smaller than the second distance, and the steel pipe pile 2 is close to the prefabricated pipe pile 1, and is more tightly combined with the prefabricated pipe pile 1 and the soil 5. After the steel sheet pile 4 is pulled out, the steel pipe pile 2, the prefabricated pipe pile 1 and the soil 5 can form a new combined support structure together to ensure the safety of the foundation pit support.

[0037] Example 2

[0038] Different from the first embodiment, in the present embodiment, the plurality of steel pipes 3 are arranged in multiple rows, and in the cross section of the steel pipe pile 2, the steel pipes 3 are arranged in a plum blossom shape.

[0039] Since the steel pipes 3 are arranged in multiple rows in a plum blossom shape, the steel pipes 3 are more closely combined with the soil 5, the strength of the support structure is higher, and the number of steel pipes 3 can be saved within the same volume, thereby improving economy.

[0040] Example 3

[0041] Different from Example 1, the steel pipes 3 in the steel pipe piles 2 have a sequential arrangement order, and the injection order of the steel pipes 3 is sorted by the distance from the prefabricated pipe piles 1. The row of steel pipes 3 with a smaller distance is injected first, and the row of steel pipes 3 with a larger distance is injected later. After the injection of all the steel pipe piles 2 is completed, the steel sheet piles 4 are removed.

[0042] In some preferred implementations of this embodiment, during the removal of the steel sheet piles 4, the deformation of the soil 5 is monitored.

[0043] In some preferred implementation schemes of this embodiment, after the steel sheet piles 4 are removed, subsequent reinforcement binding and concrete pouring are carried out on the side close to the foundation pit 6 to complete the construction of the reinforced concrete structure.

[0044] Example 4

[0045] The difference from Example 3 is that in this embodiment, after the strength of the reinforced concrete structure meets the requirements, the steel pipe piles 2 are removed and the steel pipes 3 are reused.

[0046] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A combined support structure of steel sheet piles and prefabricated pipe piles, characterized in that: It includes prefabricated pipe piles, steel pipe piles and steel sheet piles, which are arranged in sequence from near to far from the foundation pit side. The steel sheet piles, steel pipe piles and prefabricated pipe piles are all inserted into the soil and form a combined support structure together with the soil.

2. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 1, characterized in that: The steel pipe pile includes a plurality of steel pipes, and the plurality of steel pipes are inserted into the soil to a preset first depth.

3. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 2, characterized in that: The plurality of steel pipes have a preset pipe diameter and wall thickness.

4. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 2, characterized in that: The steel pipes are arranged in double rows in an alternating manner.

5. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 2, characterized in that: The plurality of steel pipes are arranged in a plum blossom shape.

6. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 2, characterized in that: The prefabricated pipe piles are inserted into the soil to a preset second depth, and the steel sheet piles are inserted into the soil to a preset third depth.

7. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 6, characterized in that: The second depth>the first depth≥the third depth.

8. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 1, characterized in that: The prefabricated pipe piles are arranged continuously at intervals, and the steel sheet piles are arranged continuously.

9. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 1, characterized in that: There is a preset first distance between the steel pipe pile and the prefabricated pipe pile, and there is a preset second distance between the steel pipe pile and the steel sheet pile.

10. The combined support structure of steel sheet piles and prefabricated pipe piles according to claim 9, characterized in that: The first distance is smaller than the second distance.

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