Detachable front support grouting steel pipe pile connecting device and mounting method

Abstract

The invention relates to the technical field of foundation pit supporting, and provides a detachable front supporting grouting steel pipe pile connecting device and a mounting method.The detachable front supporting grouting steel pipe pile connecting device comprises a first steel pipe pile with a first connector section, a second steel pipe pile with a second connector section, a sealing guide rail set and a fastener; and the second steel pipe pile with the second joint section is screwed into the first steel pipe pile with the first joint section through the sealing guide rail group and is fixed through a fastener. According to the joint device, the sealing guide rail set and the fastener are arranged, so that disassembly and assembly work can be flexibly carried out, steel pipe recovery in the support disassembly process is facilitated, the construction process is greener, and the construction cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a detachable front-support grouting steel pipe pile connection device and an installation method. Background Art

[0002] In the process of sustained economic development in my country, the scale of urbanization construction is expanding, the utilization of underground space has received more and more attention, and the depth of foundation pit excavation has been continuously deepened, which has increased the technical requirements for foundation pit engineering. Foundation pit support is an important part of foundation pit engineering, and its overall construction quality is very critical. Generally speaking, foundation pit support is a temporary structure. If the investment is too much, it will cause unnecessary waste. Once the support structure is unsafe, it is easy to cause engineering accidents, resulting in casualties, damage to adjacent buildings and other serious hazards. Therefore, it is very necessary to choose a safe, reasonable and economical foundation pit support plan.

[0003] The front support grouting steel pipe support system can effectively improve the efficiency of engineering construction in foundation pit construction. By adopting this support system during the construction process, the probability of deformation and collapse during earth excavation can be reduced, and the safety and stability of construction can be improved. Due to its improved construction efficiency and reduced construction risks, it can save manpower and material resources, thereby reducing the overall construction cost. The amount of materials such as steel bars and concrete used is far less than that of conventional solutions, avoiding secondary noise and dust pollution to the environment caused by dismantling the support. It has a good green environmental protection effect and significant social comprehensive benefits. Compared with conventional horizontal internal supports, this process can reduce the difficulty of foundation pit construction, improve work efficiency, shorten construction period, and save costs, and can provide reference for the application of similar support technologies.

[0004] However, in existing construction cases, front-support grouting steel pipe piles are mostly connected by welding. Although this method is simple, it consumes a lot of energy and leaves a significant carbon footprint. In addition, the steel pipe piles connected by welding have certain difficulties in disassembly and recycling. Therefore, it is necessary to propose a front-support grouting steel pipe pile connection method that is easy to disassemble and recycle, which has positive significance for carbon reduction and emission reduction in engineering implementation and green and environmentally friendly construction. Summary of the invention

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a detachable front support grouting steel pipe pile connection device, comprising a first steel pipe pile with a first joint section, a second steel pipe pile with a second joint section, a sealing guide rail group and a fastener, wherein the second steel pipe pile with the second joint section is screwed into the first steel pipe pile with the first joint section through the sealing guide rail group and fixed by the fastener. The present invention can be more flexibly disassembled and assembled by providing a sealing guide rail group, which is conducive to the recovery of steel pipes during the support removal process, making the construction process more green and also conducive to reducing construction costs.

[0007] Furthermore, the first joint section is arranged at one end of the first steel pipe pile, a plurality of groups of first spiral grooves are arranged on the inner side of the first joint section, a first sealing ring groove is arranged at the first joint section near the interface, and the first spiral groove and the first sealing ring groove are connected.

[0008] Furthermore, the second joint section is arranged at one end of the second steel pipe pile, a plurality of groups of second spiral grooves are arranged on the outer side of the second joint section, a second sealing ring groove is arranged at the second joint section away from the interface, and the second spiral groove and the second sealing ring groove are connected.

[0009] Furthermore, the number of the first spiral grooves and the second spiral grooves are the same, and the spiral directions are the same.

[0010] Furthermore, the first spiral groove and the second spiral groove form a closed space.

[0011] Furthermore, the sealing guide rail assembly includes a sealing ring and a sealing strip, the sealing strip is spirally arranged, one end of the sealing strip is connected to the sealing ring, the sealing ring is placed in the first sealing ring groove and the second sealing ring groove, and the sealing strip is configured to guide the second joint segment to be screwed into the first joint segment after the sealing strip is placed in the second spiral groove. During installation, the sealing strip and the second spiral groove together form a set of guide rails, which are connected to the first spiral groove to ensure the fit and positioning of the front and rear joints.

[0012] Furthermore, the number, length and spiral direction of the sealing strip are consistent with the second spiral groove. Preferably, the total length of the first joint section / the second joint section should be greater than 1 / 2 of the diameter of the steel pipe pile, the radius of the first spiral groove / the second spiral groove should not exceed 3 / 10 of the wall thickness of the steel pipe pile, the length of the sealing ring groove should be not less than 5 mm and not more than 10 mm, and the thickness should not be less than the radius of the first spiral groove / the second spiral groove.

[0013] Furthermore, the sealing strip fits tightly into the closed space.

[0014] Furthermore, a through screw hole is provided on the first joint section / second joint section between the two first spiral grooves / second spiral grooves, and the fastener fixes the first joint section and the second joint section through the through screw hole. The diameter of the through screw hole and the corresponding fastener should be greater than or equal to 10 mm.

[0015] Preferably, the raw materials of the first joint section and the second joint section are cut from steel pipes. The joint form of the present invention can be directly cut and processed from seamless steel pipes, and the specifications of the joint can be flexibly changed according to the actual needs of the actual project. It is more flexible than welding connection and reduces the green environmental protection problems caused by welding.

[0016] The present invention provides an installation method for a detachable front support grouting steel pipe pile joint, the installation method is applicable to the above-mentioned detachable front support grouting steel pipe pile joint, and the installation method comprises:

[0017] (1) Lubricate the sealing guide rail assembly, and then install the sealing guide rail assembly on the second sealing ring groove and the second spiral groove of the second joint section;

[0018] (2) aligning the first joint segment and the second joint segment, and then screwing the second spiral groove into the first spiral groove;

[0019] (3) The fastener connects and fixes the first joint section and the second joint section through the screw hole.

[0020] The present invention has the following beneficial effects:

[0021] (1) The joint form of the present invention can be directly cut and processed by seamless steel pipes, and the specifications of the joints can be flexibly changed according to the actual needs of the actual project. Compared with welding connection, it is more flexible and reduces the green environmental protection problems caused by welding.

[0022] (2) The joint device of the present invention is provided with a sealing guide rail group and a fastener, so that the disassembly and assembly work can be carried out more flexibly, which is beneficial to the recovery of steel pipes during the support and dismantling process, making the construction process more green and also beneficial to reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the installation state in Example 1.

[0024] Figure 2 This is a schematic diagram of the structure after installation in Example 1

[0025] Figure 3 It is a schematic diagram of the structure of the first joint section in Example 1.

[0026] Figure 4 It is a schematic diagram of the structure of the second joint section in Example 1.

[0027] Figure 5 It is a structural schematic diagram of the sealed guide rail group in Example 1.

[0028] Figure 6 It is a schematic diagram of the structure in which the sealing guide rail assembly in Example 2 is placed on the second joint section. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. It should be pointed out that the embodiments are only specific explanations of the invention and should not be regarded as limitations of the invention. The purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical solutions of the present invention. The protection scope of the present invention shall still be based on the scope defined by the claims.

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment provides a detachable front support grouting steel pipe pile connection device, including a first steel pipe pile 1 with a first joint section 11, a second steel pipe pile 2 with a second joint section 21, a sealing guide rail group 3 and a fastener 4. The second steel pipe pile 2 with the second joint section 21 is screwed into the first steel pipe pile 1 with the first joint section 11 through the sealing guide rail group 3 and fixed by the fastener 4. The present invention can be more flexibly disassembled and assembled by providing a sealing guide rail group 3, which is conducive to the recovery of steel pipes during the support removal process, making the construction process more green and also conducive to reducing construction costs.

[0032] like Figure 3-4 As shown, the first joint section 11 is arranged at one end of the first steel pipe pile 1, and a plurality of first spiral grooves 111 are arranged on the inner side of the first joint section 11. A first sealing ring groove 112 is arranged at the first joint section 11 close to the interface, and the first spiral groove 111 and the first sealing ring groove 112 are connected. The second joint section 21 is arranged at one end of the second steel pipe pile 2, and a plurality of second spiral grooves 211 are arranged on the outer side of the second joint section 21. A second sealing ring groove 212 is arranged at the second joint section 21 far from the interface, and the second spiral groove 211 and the second sealing ring groove 212 are connected. The number of the first spiral grooves 111 and the second spiral grooves 211 are the same, and the spiral directions are the same. The first spiral grooves 111 and the second spiral grooves 211 constitute a closed space.

[0033] like Figure 5As shown, the sealing guide rail group 3 includes a sealing ring 31 and a sealing strip 32, the sealing strip 32 is spirally arranged, one end of the sealing strip 32 is connected to the sealing ring 31, the sealing ring 31 is placed in the first sealing ring groove 112 and the second sealing ring groove 212, and the sealing strip 32 is configured to guide the second joint section 21 to be screwed into the first joint section 11 after the sealing strip 32 is placed in the second spiral groove 211. During installation, the sealing strip 32 and the second spiral groove 211 together form a set of guide rails, which are connected to the first spiral groove 111 to ensure the fit and positioning of the front and rear joints. The number, length, and spiral direction of the sealing strip 32 are consistent with the second spiral groove 211. Preferably, the total length of the first joint section 11 / the second joint section 21 should be greater than 1 / 2 of the diameter of the steel pipe pile, the radius of the first spiral groove 111 / the second spiral groove 211 should not exceed 3 / 10 of the wall thickness of the steel pipe pile, the length of the sealing ring groove should be no less than 5 mm and no more than 10 mm, and the thickness should be no less than the radius of the first spiral groove / the second spiral groove. The sealing strip 32 fits tightly in the closed space. When the first joint section and the second joint section are connected, the sealing ring is placed on the first sealing ring groove 112 and the second sealing ring groove 212, and a plurality of sealing strips are arranged inside, so that the rigidity of the first joint section 11 and the second joint section 21 becomes larger and the sealing effect is enhanced.

[0034] A through screw hole 5 is provided on the first joint section 11 / second joint section 21 between the two first spiral grooves 111 / second spiral grooves 211, and the fastener 4 fixes the first joint section 11 and the second joint section 21 through the through screw hole 5. The diameter of the through screw hole 5 and the corresponding fastener 4 should be greater than or equal to 10 mm.

[0035] The raw materials of the first joint section 11 and the second joint section 21 are obtained by cutting steel pipes. The joint form of the present invention can be directly cut and processed by seamless steel pipes. The specifications of the joint can be flexibly changed according to the actual needs of the actual project. Compared with welding connection, it is more flexible and reduces the green environmental protection problems caused by welding.

[0036] Example 2

[0037] This embodiment provides a method for installing a detachable front support grouting steel pipe pile joint, which is applicable to the above-mentioned detachable front support grouting steel pipe pile joint, and the installation method includes:

[0038] S1, lubricate the sealing guide rail assembly, and then install the sealing guide rail assembly 3 on the second sealing ring groove 212 and the second spiral groove 211 of the second joint section 21, as shown in FIG. Figure 6 As shown;

[0039] S2, align the first joint section 11 and the second joint section 21, and then screw the second spiral groove 211 into the first spiral groove 111, as shown in FIG. Figure 1 As shown;

[0040] S3, the fastener 4 connects and fixes the first joint section 11 and the second joint section 21 through the screw hole 5, as shown in FIG. Figure 2 shown.

[0041] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0042] It should be noted that the technical features not described in detail in the present invention can be implemented by any existing technology.

Claims

1. A detachable front support grouting steel pipe pile connection device, characterized in that: It includes a first steel pipe pile with a first joint section, a second steel pipe pile with a second joint section, a sealing guide rail group and fasteners. The second steel pipe pile with the second joint section is screwed into the first steel pipe pile with the first joint section through the sealing guide rail group and fixed by the fasteners.

2. A detachable front support grouting steel pipe pile joint according to claim 1, characterized in that: The first joint section is arranged at one end of the first steel pipe pile, a plurality of first spiral grooves are arranged on the inner side of the first joint section, a first sealing ring groove is arranged at the first joint section near the interface, and the first spiral groove and the first sealing ring groove are connected.

3. A detachable front support grouting steel pipe pile joint according to claim 2, characterized in that: The second joint section is arranged at one end of the second steel pipe pile, a plurality of groups of second spiral grooves are arranged on the outer side of the second joint section, a second sealing ring groove is arranged at the second joint section away from the interface, and the second spiral groove and the second sealing ring groove are connected.

4. A detachable front support grouting steel pipe pile joint according to claim 3, characterized in that: The first spiral grooves and the second spiral grooves have the same number and the same spiral directions.

5. The detachable front support grouting steel pipe pile joint according to claim 3 is characterized in that: The first spiral groove and the second spiral groove form a closed space.

6. A detachable front support grouting steel pipe pile joint according to claim 5, characterized in that: The sealing guide rail group includes a sealing ring and a sealing strip, the sealing strip is arranged in a spiral shape, one end of the sealing strip is connected to the sealing ring, the sealing ring is placed in a first sealing ring groove and a second sealing ring groove, and the sealing strip is configured to guide the second joint segment to be screwed into the first joint segment when the sealing strip is placed in the second spiral groove.

7. A detachable front support grouting steel pipe pile joint according to claim 6, characterized in that: The number, length and spiral direction of the sealing strips are consistent with the first spiral groove / the second spiral groove.

8. The detachable front support grouting steel pipe pile joint according to claim 6, characterized in that: The sealing strip fits tightly into the closed space.

9. The detachable front support grouting steel pipe pile joint according to claim 3, characterized in that: A through screw hole is provided on the first joint segment / the second joint segment between the two first spiral grooves / the second spiral grooves, and the fastener fixes the first joint segment and the second joint segment through the through screw hole.

10. A method for installing a detachable front support grouting steel pipe pile joint, characterized in that: The installation method is applicable to a detachable front support grouting steel pipe pile joint as described in any one of claims 1 to 9, and the installation method comprises: (1) Lubricate the sealing guide rail assembly, and then install the sealing guide rail assembly on the second sealing ring groove and the second spiral groove of the second joint section; (2) aligning the first joint segment and the second joint segment, and then screwing the second spiral groove into the first spiral groove; (3) The fastener connects and fixes the first joint section and the second joint section through the screw hole.

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