Steel sheet pile and cement mixing pile combined supporting structure

Abstract

The utility model provides a steel sheet pile and cement mixing pile combined supporting structure which comprises a first steel sheet pile body, a second steel sheet pile body and a cement mixing pile. The first steel sheet pile body and the second steel sheet pile body are alternately connected in a clamped mode, the cement mixing pile comprises a positioning sleeve and a cement pile body, the positioning sleeve is fixed to the first steel sheet pile body and / or the second steel sheet pile body, the upper end of the cement pile body is flush with the first steel sheet pile body and the second steel sheet pile body, and the lower end of the cement pile body extends out of the bottoms of the first steel sheet pile body and the second steel sheet pile body. The positioning sleeves are arranged on the first steel sheet pile body and / or the second steel sheet pile body to form the cement pile body, so that the stability and the firmness of a steel sheet pile body supporting structure in the prior art are improved; the operation difficulty is effectively reduced, the workload is reduced, the working efficiency is improved, and the construction quality is ensured; the whole supporting structure is stable, and the reliability is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit support, in particular to a steel sheet pile and cement mixing pile combined support structure. Background Art

[0002] Support structures are needed during foundation pit excavation. For example, during the excavation of the foundation pit of an elevator shaft, the site is limited and slope excavation is not possible. It can only be excavated vertically. Therefore, support structures are generally needed to reinforce and protect the foundation pit to prevent collapse. Existing cement mixing piles have the advantages of good support stability and small deformation, but their cost is high and the construction period is long; existing steel sheet piles have the advantages of fast construction cycle and high secondary utilization rate, but their disadvantage is that the steel sheet piles are connected by bite joints and are prone to deformation. Based on the above situation, it is necessary to design a joint support structure of steel sheet piles and cement mixing piles to solve the above problems. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a joint support structure of steel sheet piles and cement mixing piles, which is convenient to construct and has high reliability, and effectively improves the construction efficiency of the support structure.

[0004] The technical solution adopted by the utility model is: a combined support structure of steel sheet piles and cement mixing piles, comprising a first steel sheet pile body, a second steel sheet pile body and a cement mixing pile; the first steel sheet pile body and the second steel sheet pile body are alternately engaged and connected, and the cement mixing piles are dispersedly fixed to the first steel sheet pile body and / or the second steel sheet pile body.

[0005] Furthermore, the cement mixing pile includes a positioning sleeve, which is fixed to the first steel sheet pile body and / or the second steel sheet pile body and is used to shape the cement pile body.

[0006] Furthermore, the upper end of the cement pile body is flush with the first steel sheet pile body and the second steel sheet pile body, and the lower end extends beyond the bottom of the first steel sheet pile body and the second steel sheet pile body.

[0007] Furthermore, the first steel sheet pile body and the second steel sheet pile body are combined to form an integral structure, and the cement mixing pile is arranged outside the integral structure.

[0008] Furthermore, the first steel sheet pile body and the second steel sheet pile body are connected via a bite, and a magnetic water stop strip is provided at the bite.

[0009] Furthermore, the first steel sheet pile body and the second steel sheet pile body are Larsen IV type steel sheet piles or Larsen VI type steel sheet piles.

[0010] Furthermore, the positioning sleeve and the first steel sheet pile body and / or the second steel sheet pile body are manufactured in an integrated manner.

[0011] Furthermore, an internal support is provided inside the overall structure.

[0012] The advantages and positive effects of the utility model are:

[0013] (1) The present application increases the stability and firmness of the steel sheet pile support structure in the prior art by providing a positioning sleeve on the first steel sheet pile body and / or the second steel sheet pile body, inserting the first steel sheet pile body and / or the second steel sheet pile body into the soil simultaneously during construction, and then injecting grout into the positioning sleeve to form a cement pile body.

[0014] (2) The cement mixing piles are constructed simultaneously with the first steel sheet pile body and / or the second steel sheet pile body. Compared with the cement mixing pile construction in the prior art, there is no need to perform measurement and marking work, which effectively reduces the operation difficulty, reduces the workload, improves the work efficiency, and ensures the construction quality.

[0015] (3) The overall support structure is stable and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0017] Figure 2 It is a top view of a specific embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection between the first steel sheet pile body and the second steel sheet pile body in a specific embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the connection between the first steel sheet pile body and the positioning sleeve in a specific embodiment of the utility model.

[0020] In the figure:

[0021] 1. First steel sheet pile body 2. Second steel sheet pile body 3. Bite

[0022] 4. Positioning sleeve 5. Cement pile 6. Internal support

[0023] 7. Magnetic waterstop strip DETAILED DESCRIPTION

[0024] The embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0025] like Figure 1-Figure 2As shown, the utility model proposes a combined support structure of steel sheet piles and cement mixing piles, comprising a first steel sheet pile body 1, a second steel sheet pile body 2 and cement mixing piles; the first steel sheet pile body 1 and the second steel sheet pile body 2 are alternately engaged and connected, and the cement mixing piles are dispersedly fixed to the first steel sheet pile body 1 and / or the second steel sheet pile body 2.

[0026] The first steel sheet pile body 1 and the second steel sheet pile body 2 are made of the same type of steel sheet piles. In the present application, the first steel sheet pile body 1 and the second steel sheet pile body 2 are made of steel sheet piles with a U-shaped cross-section. The first steel sheet pile body 1 and the second steel sheet pile body 2 are alternately connected, and the openings face in opposite directions. The specific structure of the steel sheet pile is a common structure in the prior art, so it will not be repeated here.

[0027] In the prior art, steel sheet piles are usually arranged around the foundation pit to form a foundation pit support and waterproof structure. When in use, a static pressure pile driver is used or the steel sheet piles are inserted into the soil through the cooperation of a vibrating hammer and a crane, and then the foundation pit is excavated. When the excavation reaches a certain depth, it is necessary to add an internal support 6 on the side of the steel sheet pile close to the excavation site to improve the support firmness of the first steel sheet pile body 1 and the second steel sheet pile body 2, and prevent them from being displaced or deformed under the action of the unilateral soil side pressure, causing safety hazards.

[0028] Compared with the prior art, the present application effectively improves the stiffness and stability of the steel sheet piles by adding cement mixing piles, and the cement mixing piles are fixedly connected to the steel sheet piles and are simultaneously driven into the soil during construction. Compared with first constructing the steel sheet piles and then constructing the cement mixing piles, there is no need for steps such as measuring and laying out, and the overall operation is simpler, which effectively improves the construction efficiency; compared with using concrete piles alone, the cost is lower and the construction is faster.

[0029] In this embodiment, the number and position of cement mixing piles are set according to the protection requirements, and can be consistent with the number of the first steel sheet pile body 1 and the second steel sheet pile body 2, that is, each first steel sheet pile body 1 and / or the second steel sheet pile body 2 is provided with a cement mixing pile; the number of cement mixing piles can also be less than the first steel sheet pile body 1 and the second steel sheet pile body 2, and be arranged at intervals between the first steel sheet pile body 1 and / or the second steel sheet pile body 2.

[0030] In a specific embodiment, Figure 3-Figure 4As shown, the present application proposes a specific structure for realizing a fixed connection between a cement mixing pile and a first steel sheet pile body 1 and / or a second steel sheet pile body 2: the cement mixing pile includes a positioning sleeve 4, which is fixed to the first steel sheet pile body 1 and / or the second steel sheet pile body 2 and is used to shape the cement pile body 5. During specific installation, the connecting body of the positioning sleeve 4 and the first steel sheet pile body 1 and / or the connecting body of the positioning sleeve 4 and the second steel sheet pile body 2 are driven into the soil together, and then cement slurry is poured into the positioning sleeve 4 to form the cement pile body 5; in the present application, the positioning sleeve 4, on the one hand, serves as a shaping mold for the cement pile body 5, and on the other hand, realizes a stable connection between the cement pile body 5 and the first steel sheet pile body 1 and / or the second steel sheet pile body 2, while making the overall operation simple and convenient, and the construction quality effect is good.

[0031] Furthermore, if Figure 1 As shown, in order to make the first steel sheet pile body 1 and the second steel sheet pile body 2 more stably fixed in the soil, the upper end of the cement pile body 5 is flush with the first steel sheet pile body 1 and the second steel sheet pile body 2, and the lower end extends beyond the bottom of the first steel sheet pile body 1 and the second steel sheet pile body 2, that is, the length of the cement pile body 5 is longer than the first steel sheet pile body 1 and the second steel sheet pile body 2, and penetrates into the soil below the first steel sheet pile body 1 and the second steel sheet pile body 2. When the excavation depth of the foundation pit is close to the implantation depth of the first steel sheet pile body 1 and the second steel sheet pile body 2, the cement pile body 5 is buried in the deeper soil, making the first steel sheet pile body 1 and the second steel sheet pile body 2 more stable.

[0032] In this embodiment, the length of the positioning sleeve 4 is the same as that of the first steel sheet pile body 1 and the second steel sheet pile body 2. During construction, after the connector of the positioning sleeve 4 and the first steel sheet pile body 1 and / or the connector of the positioning sleeve 4 and the second steel sheet pile body 2 are driven into the soil together, a drilling device is inserted into the positioning sleeve 4 to drill holes in the soil below it. The drilling depth is set according to the preset length of the cement pile body 5, and then grouting is performed into the positioning sleeve 4. The cement slurry continues to flow downward into the drilling position through the positioning sleeve 4. When the cement slurry solidifies, a cement pile body 5 is formed, so that the length of the cement pile body 5 is longer than the length of the first steel sheet pile body 1 and the second steel sheet pile body 2.

[0033] In other embodiments of the present application, the length of the positioning sleeve 4 is longer than the length of the first steel sheet pile body 1 and the second steel sheet pile body 2, the upper end of the positioning sleeve 4 is flush with the first steel sheet pile body 1 and the second steel sheet pile body 2, and the lower end is longer than the first steel sheet pile body 1 and the second steel sheet pile body 2. During construction, the connector of the positioning sleeve 4 and the first steel sheet pile body 1 and / or the connector of the positioning sleeve 4 and the second steel sheet pile body 2 are driven into the soil together, and grouting is directly injected into the positioning sleeve 4 to form a cement pile body 5 after solidification.

[0034] In a specific embodiment, Figure 2As shown, the first steel sheet pile body 1 and the second steel sheet pile body 2 are combined to form an integral structure, and the cement mixing piles are arranged outside the integral structure. Since the soil inside the integral structure is the part that needs to be excavated, arranging the cement mixing piles outside the integral structure can avoid their influence on the foundation pit excavation and make the overall support structure more stable.

[0035] In this embodiment, if Figure 2 As shown, the first steel sheet pile body 1 is connected to the second steel sheet pile body 2 through a bite 3, and a magnetic water stop strip 7 is provided at the bite 3 to achieve an anti-seepage effect. The shape of the bite 3 is not limited, and a single bite 3, a vertical bite 3, a combined angle bite 3 or a corner bite 3 can be used to achieve a stable connection between the first steel sheet pile body 1 and the second steel sheet pile body 2.

[0036] In some specific embodiments of the present application, the first steel sheet pile body 1 and the second steel sheet pile body 2 are Larsen IV type steel sheet piles or Larsen VI type steel sheet piles, which are selected according to the excavation depth of the foundation pit.

[0037] Preferably, in the present embodiment, the positioning sleeve 4 is integrally manufactured with the first steel sheet pile body 1 and / or the second steel sheet pile body 2, and specifically, can be factory customized; in other embodiments of the present application, the positioning sleeve 4 is welded and fixed to the first steel sheet pile body 1 and / or the second steel sheet pile body 2.

[0038] Furthermore, an inner support 6 is provided inside the overall structure to further improve the stability of the supporting structure.

[0039] The advantages and positive effects of the utility model are:

[0040] (1) The present application increases the stability and firmness of the steel sheet pile support structure in the prior art by providing a positioning sleeve on the first steel sheet pile body and / or the second steel sheet pile body, inserting the first steel sheet pile body and / or the second steel sheet pile body into the soil simultaneously during construction, and then injecting grout into the positioning sleeve to form a cement pile body.

[0041] (2) The cement mixing piles are constructed simultaneously with the first steel sheet pile body and / or the second steel sheet pile. Compared with the cement mixing pile construction in the prior art, there is no need to perform measurement and marking work, which effectively reduces the difficulty of operation, reduces the workload, improves work efficiency, and ensures the construction quality.

[0042] (3) The overall support structure is stable and more reliable.

[0043] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A steel sheet pile and cement mixing pile combined support structure, characterized in that: It includes a first steel sheet pile body, a second steel sheet pile body and a cement mixing pile; the first steel sheet pile body and the second steel sheet pile body are alternately engaged and connected, and the cement mixing pile is dispersedly fixed to the first steel sheet pile body and / or the second steel sheet pile body; the cement mixing pile includes a positioning sleeve, and the positioning sleeve is fixed to the first steel sheet pile body and / or the second steel sheet pile body, and is used to shape the cement pile body.

2. The steel sheet pile and cement mixing pile combined support structure according to claim 1 is characterized in that: The upper end of the cement pile body is flush with the first steel sheet pile body and the second steel sheet pile body, and the lower end extends beyond the bottom of the first steel sheet pile body and the second steel sheet pile body.

3. The steel sheet pile and cement mixing pile combined support structure according to claim 1 or 2, characterized in that: The first steel sheet pile body and the second steel sheet pile body are combined to form an integral structure, and the cement mixing pile is arranged outside the integral structure.

4. The steel sheet pile and cement mixing pile combined support structure according to claim 1 is characterized in that: The first steel sheet pile body and the second steel sheet pile body are connected through a bite, and a magnetic water stop strip is provided at the bite.

5. The steel sheet pile and cement mixing pile combined support structure according to claim 1 is characterized in that: The first steel sheet pile body and the second steel sheet pile body are Larsen IV type steel sheet piles or Larsen VI type steel sheet piles.

6. The steel sheet pile and cement mixing pile combined support structure according to claim 1 is characterized in that: The positioning sleeve is integrally manufactured with the first steel sheet pile body and / or the second steel sheet pile body.

7. The steel sheet pile and cement mixing pile combined support structure according to claim 3 is characterized in that: An inner support is arranged inside the overall structure.

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