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Unsupported deep foundation pit support system

A deep foundation pit support and unsupported technology, which is applied in infrastructure engineering, construction, excavation, etc., can solve the problems of high cost, achieve the effects of shortening the construction period, stabilizing the support, and avoiding on-site cutting

Active Publication Date: 2020-07-21
江苏地基工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the later land use, the piling parts need to be pulled out with pile pulling equipment, which is expensive

Method used

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  • Unsupported deep foundation pit support system
  • Unsupported deep foundation pit support system
  • Unsupported deep foundation pit support system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: a kind of unsupported deep foundation pit supporting system, such as figure 1 As shown, it includes the inner row of piles 1, the middle row of piles 2 and the outer row of piles 3 arranged in sequence from the inside to the outside around the periphery of the foundation pit, and the top heights of the three are arranged in sequence from low to high. Due to the stepped arrangement of the inner row of piles 1, the middle row of piles 2, and the outer row of piles 3, the stress on the inner row of piles 1 and the middle row of piles 2 is reduced, so that the inner row of piles 1 and the middle row of piles can be reduced. The row of piles 2 is inserted into the depth of the soil, and the use of materials is reduced, which is energy-saving and environment-friendly.

[0044] Such as figure 1 As shown, the inner row of piles 1 is surrounded by the edge of the foundation pit. The inner row of piles 1 includes a number of inner foundation piles 11 arranged side ...

Embodiment 2

[0054] Embodiment 2: a kind of unsupported deep foundation pit supporting system, such as Figure 7 As shown, the difference from Embodiment 1 is that the connection assembly 14 includes a number of nut seats 146 equidistantly arranged on the crown and beam modules 13 , and fixed holes are inserted between the nut seats 146 on two adjacent crown and beam modules 13 . The bolt 148 is covered with a fixing nut 147 , and the part of the fixing bolt 148 located between the two nut seats 146 is also covered with a limit nut 149 . The two crown beam modules 13 are installed together by screwing the fixing bolts 148 , and the connection of two adjacent crown beam modules 13 is made more compact according to the screwing depth of the fixing bolts 148 . In addition, since the two nut seats 146 are installed and screwed together by the fixing bolts 148 for a long time, the two nut seats 146 are deformed or even broken, and the limit nut 149 is located between the two nut seats 146, whic...

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Abstract

The invention discloses a support-free deep foundation pit support system and belongs to the field of foundation pit support. The support-free deep foundation pit support system aims at achieving theeffects that the bending-resistant torque is large, and a deep foundation pit is supported more stably. According to the main technical scheme, the support-free deep foundation pit support system comprises an inner side pile row, a middle pile row and an outer side pile row; the inner side pile row is arranged at the edge of the foundation pit in a surrounding manner and comprises multiple inner side foundation piles and multiple first assembling type crown beams, wherein the multiple inner side foundation piles are arranged side by side, and the multiple first assembling type crown beams areused for being connected with the tops of the multiple inner side foundation piles; the middle pile row is arranged at the outer side of the inner side pile row in a surrounding manner and comprises multiple middle foundation piles and multiple second assembling type crown beams, wherein the multiple middle foundation piles are arranged side by side, and the multiple second assembling type crown beams are used for being connected with the tops of the multiple middle foundation piles; and the outer side pile row is arranged at the outer side of the middle pile row and comprises multiple outer side foundation piles and multiple third assembling type crown beams, wherein the multiple outer side foundation piles are arranged side by side, and the multiple third assembling type crown beams areused for being connected with the tops of the multiple outer side foundation piles. The system is provided with the inner side pile row, the middle pile row and the outer side pile row, and structuralresistance performance formed by the inner side pile row, the middle pile row and the outer side pile row is remarkably improved; and thus, the deep foundation pit can be supported more stably.

Description

technical field [0001] The invention relates to the field of foundation pit support, in particular to an unsupported deep foundation pit support system. Background technique [0002] Deep foundation pit engineering is the first construction process of urban space development and utilization. With the increase of deeper and deeper foundation pit projects, there are more and more methods of foundation pit support. It is a very important step to choose a reasonable support scheme that can not only meet the requirements of use, but also be environmentally friendly and energy-saving, and at the same time save the project cost. The piles of the pile-anchor structure currently used are mainly reinforced concrete pouring piles, pipe piles + anchor cables. [0003] At present, there are many forms of single-row pile-anchor support bodies used in deep foundation pit engineering in civil engineering, and most of them use non-recyclable reinforced concrete bodies or pipe piles as suppo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04
CPCE02D17/04E02D2600/20
Inventor 周芳周曙东陈家冬尚学伟周浩达
Owner 江苏地基工程有限公司
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