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Vertical connection structure of pre-embedded bolt type prefabricated underground continuous wall

A technology for underground diaphragm walls and connection structures, which is applied in foundation structure engineering, sheet pile walls, excavation, etc., and can solve problems such as limitations, generally no more than 13-18m, and the insertion depth of a single wall cannot meet the design requirements.

Active Publication Date: 2020-05-19
ZHEJIANG PROVINCE INST OF ARCHITECTURAL DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current prefabricated underground diaphragm wall is affected by factors such as traffic control and the radius of gyration of the site. The length of a single wall of the prefabricated underground diaphragm wall is often limited, generally not exceeding 13~18m; but the actual foundation pit project is due to the deep excavation depth. , the insertion depth of a single wall cannot meet the design requirements, so two or even more prefabricated underground continuous walls are often vertically connected to achieve the wall depth required by the design

Method used

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  • Vertical connection structure of pre-embedded bolt type prefabricated underground continuous wall
  • Vertical connection structure of pre-embedded bolt type prefabricated underground continuous wall
  • Vertical connection structure of pre-embedded bolt type prefabricated underground continuous wall

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Experimental program
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specific Embodiment 1

[0046] Specific embodiment one: as figure 1 , figure 2 , image 3 , Figure 4 As shown, a prefabricated bolt-type vertical connection structure of prefabricated underground diaphragm walls includes a lower prefabricated underground diaphragm wall 1 , an upper prefabricated underground diaphragm wall 2 , several vertical connection components 3 and a horizontal joint sealing structure 4 . The upper prefabricated underground diaphragm wall is supported on the top surface of the lower prefabricated underground diaphragm wall.

[0047] The vertical connection assembly 3 is used for connecting the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall. The vertical connection assembly 3 includes a pre-embedded connection stud 3.1 pre-buried on the top of the lower prefabricated underground diaphragm wall, a nut 3.4 threadedly fitted with the pre-embedded connection stud, and a nut arranged on the lower side of the upper prefabric...

specific Embodiment 2

[0058] Specific embodiment two, all the other structures of this embodiment refer to specific embodiment one, and its difference is:

[0059] like Figure 5 As shown, the grouting hole 5 extends obliquely upward from the positioning connection hole. In this embodiment, a number of vertical reinforcement sleeves 9 are pre-embedded in the upper prefabricated underground diaphragm wall, and the vertical reinforcement sleeves are connected with the pre-embedded connection studs In one correspondence, the inner cavity of the vertical reinforcement sleeve constitutes the positioning connection hole, the side wall of the vertical reinforcement sleeve is provided with a grouting opening, and the grouting hole communicates with the grouting opening.

[0060] In this embodiment, the high-strength grouting material is injected through the grouting hole, and the specific construction steps of filling the high-strength grouting material in the gap between the positioning connection hole an...

specific Embodiment 3

[0063] Specific embodiment three, all the other structures of this embodiment refer to specific embodiment one, and its difference is:

[0064] like Image 6 , Figure 7 As shown, a pre-embedded bolt type prefabricated underground continuous wall vertical connection structure also includes a pre-installed grouting device 10 . The preset grouting device includes a vertical grout storage tank 10.1 preset on the top surface of the lower prefabricated underground diaphragm wall 1, a grouting block 10.2 matched with the vertical grouting tank, and a support set on the side of the grouting block 10.3. The vertical grout storage tank is filled with high-strength grouting material, the grout block is supported on the top surface of the lower prefabricated underground diaphragm wall through the support, and the lower end of the grout block extends into the vertical grout storage tank, the side of the grout block There is a gap between it and the side wall of the vertical slurry stor...

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Abstract

The invention discloses a vertical connection structure of a pre-embedded bolt type prefabricated underground continuous wall. The vertical connection structure of the pre-embedded bolt type prefabricated underground continuous wall aims to achieve the effects of being high in connection strength, good in integrity, capable of meeting the requirements of wall body bending resistance and shear resistance, good in sealing performance and capable of meeting the requirements of seepage prevention and water stop. The vertical connection structure comprises a lower prefabricated underground continuous wall, an upper prefabricated underground continuous wall, a vertical connection assembly and a horizontal seam sealing structure, wherein the vertical connection assembly is used for connecting thelower prefabricated underground continuous wall with the upper prefabricated underground continuous wall, and the horizontal seam sealing structure comprises an upper wall interface face formed by the bottom face of the upper prefabricated underground continuous wall, a lower wall interface face formed by the top face of the lower prefabricated underground continuous wall, two slurry-leakage-proof sealing rubber strips positioned between the upper wall interface face and the lower wall interface face, a grouting cavity formed between the two slurry-leakage-proof sealing rubber strips and a high-strength grouting material filling the grouting cavity.

Description

technical field [0001] The invention relates to a prefabricated underground diaphragm wall, in particular to a prefabricated bolt type vertical connection structure of the prefabricated underground diaphragm wall. Background technique [0002] The underground diaphragm wall is often used as the retaining wall in the design and construction of foundation pit enclosure. The traditional cast-in-place underground diaphragm wall has many quality defects in the wall due to factors such as underwater concrete pouring, such as mud, sticky skin, and pockmarked surface. , exposed ribs, poor flatness, end voids or honeycombs and inaccurate positions of pre-components, etc. The prefabricated underground diaphragm wall process can better solve the above quality defects, and at the same time, the prefabricated underground diaphragm wall has the advantages of high strength, factory production, fast construction speed, green environmental protection, and saving construction sites. [0003]...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D5/20
CPCE02D5/20E02D17/04
Inventor 刘兴旺李瑛张金红童星刘晓燕
Owner ZHEJIANG PROVINCE INST OF ARCHITECTURAL DESIGN & RES