A construction method of a composite support structure positioning device

A technology of supporting structure and positioning device, which is applied in basic structure engineering, excavation, construction, etc., to achieve the effect of ensuring convenience and accuracy, saving construction costs, and ensuring recoverability

Active Publication Date: 2022-07-01
BEIJING CONSTR ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a composite support structure positioning device and its construction method, which are used to solve technical problems such as auxiliary positioning of core piles of composite support piles on the edge, installation of the positioning device on the edge, and hoisting construction.

Method used

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  • A construction method of a composite support structure positioning device
  • A construction method of a composite support structure positioning device
  • A construction method of a composite support structure positioning device

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Embodiment Construction

[0042] Taking a project as an example, the entire plot of the project is approximately quadrilateral, with a length of about 758m from east to west and a width of about 850m from north to south. The excavation depth of foundation pit support design is 6.1m~12.7m. The site is slightly undulating, high in the east and low in the west. The elevation around the ground is 24.30-32.00m, and the elevation of ±0.00 is the absolute elevation of 27.8m. The importance and safety level of the foundation pit is Level 2, and the design service life is 1 year. The survey of the proposed site revealed that within the depth range of 65.00m, the surface layer is artificial fill layer, the lower Quaternary recent alluvial-proluvial layer and the general Quaternary alluvial-proluvial sedimentary layer.

[0043] In this embodiment, the excavation depth is 11.7-12.0m, the safety level of the foundation pit is Level 2, and the support form of high-speed deep-mixing composite pile (DMC pile) + prest...

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Abstract

The invention discloses a positioning device and a construction method for a composite supporting structure, comprising a water-stop curtain located around the bottom of a foundation pit, a core pile connected in the water-stop curtain, and a hoisting assembly connected to the core pile; The bottom end of the core pile is higher than the bottom end of the water-stop curtain, and an anchor cable is also connected between the core pile and the surrounding soil; the water-stop curtain is located at the toe of the slope protection slope, and its inner side is close to the edge line of the toe of the slope. Through the three-dimensional modeling in the early stage, the invention is conducive to deepening and controlling the construction of the composite supporting structure and the positioning components, and the positioning components can effectively ensure the positioning of the core piles in the later stage; by inserting the core piles in the stirring piles, it is beneficial to strengthen the water-stop curtain, In addition, the length of the core pile is less than the height of the water-stop curtain, which saves the construction cost while ensuring the strength. The slope protection is used to connect the positioning components for the bearing system, and combined with the setting of the pile positioning frame and its connected sliding components, it is possible to carry out the construction of small sites. The hoisting positioning on the upper part further ensures the convenience and accuracy of construction.

Description

technical field [0001] The invention belongs to the technical field of foundation pit construction, and particularly relates to a positioning device for a composite supporting structure and a construction method thereof. Background technique [0002] In order to reduce the cost and control the verticality of the core pile in the composite supporting structure, it is generally used to sink to the design height by the self-weight of the core pile when the cement-soil slurry is relatively thin. In order to prevent the core pile from continuing to sink after sinking into place, the method of hoisting machinery is generally used to stabilize the pile body. On the one hand, this method will occupy the hoisting machinery and make the machinery not fully utilized. On the other hand, In the process of stabilizing the pile with the previous pile, the initial setting of the cement-soil slurry will lead to difficulty in inserting the core pile, and in severe cases, it will lead to an ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D5/76E02D19/18
Inventor 孙洪业杨信强焦勇张雷刚白晋合吴嘉希汤乃奇孙素凤陶英麒杨宝森刘建龙张震胡越田玉杰王泽强
Owner BEIJING CONSTR ENG GRP CO LTD
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