Offshore deep foundation pit supporting structure and construction method thereof

A deep foundation pit support and construction method technology, applied in the offshore deep foundation pit support structure and its construction field, can solve the problems of unstoppable construction speed, slowness, poor integrity, etc., achieve good waterproof effect, and improve construction efficiency , the effect of improving efficiency

Active Publication Date: 2014-04-16
SHANGHAI CONSTR NO 5 GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an offshore deep foundation pit support structure and its construction method to solve the problems of poor integrity, inability to stop water and slow construction speed in traditional support technology. In the construction of offshore deep foundation pits, the purpose of soil retaining and water stop can be realized, and the construction speed can be guaranteed at the same time, so as to reduce the construction cost

Method used

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  • Offshore deep foundation pit supporting structure and construction method thereof
  • Offshore deep foundation pit supporting structure and construction method thereof
  • Offshore deep foundation pit supporting structure and construction method thereof

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Embodiment 1

[0037] Such as figure 1 with figure 2 As shown, the offshore deep foundation pit support structure 100 of this embodiment includes: a multi-faceted underground diaphragm wall 2 and multiple anchor cables 3 located at the outer edge of the deep foundation pit 1; Multiple casings 4, one end of each anchor cable 3 is fixed on the underground diaphragm wall 2 through an anchorage 5, and the other end of the anchor cable 3 passes through the casing 4 and is fixed in the rock and soil outside the deep foundation pit 1; The tool 5 includes a rubber sealing plate 51 and a plurality of expansion bolts 52. The rubber sealing plate 51 covers the nozzle of the casing 4 near the side of the deep foundation pit 1. The expansion bolts 52 fix the rubber sealing plate 51 on the underground continuous wall 2. .

[0038] In the offshore deep foundation pit support structure 100 mentioned above, the technical scheme of integrating the underground diaphragm wall and the anchor cable is adopted....

Embodiment 2

[0042] Combine below Figure 3 to Figure 4 , describe in detail the construction method of the offshore deep foundation pit support structure 100 of embodiment one: specifically include the following steps:

[0043] Step a: milling grooves on the ground corresponding to the underground diaphragm wall 2 to form an underground groove;

[0044]Specifically, the groove milling machine is used to mill grooves on the ground. After hitting the underground rock layer, the underground rock and soil layer is broken in situ, and then pumped out to form an underground groove. Compared with the bored pile technology, the milling process can significantly improve the operation speed. The reason is that the milling process can form an underground continuous wall underground groove at a time, while the bored pile can only form one pile at a time. hole. For the hard rock in the coastal area, it takes more than 48 hours to form a 30m deep borehole. Taking 6 bored piles with a depth of 30m wit...

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Abstract

The invention provides an offshore deep foundation pit supporting structure and a construction method of the offshore deep foundation pit supporting structure, and belongs to the technical field of deep foundation pit construction. The offshore deep foundation pit supporting structure comprises a plurality of underground continuous walls, a plurality of anchor ropes and anchors, wherein the underground continuous wall is located on the outer edge of a deep foundation pit and connected end to end in a surrounding mode, a plurality of sleeves are embedded into each underground continuous wall, one end of each anchor rope is fixed to the corresponding underground continuous wall through the corresponding anchor, the other end of each anchor rope penetrates through the corresponding sleeve and is fixed into soil outside the deep foundation pit, each anchor comprises a rubber sealing plate and a plurality of expansion bolts, a pipe opening in the side, close to the deep foundation pit, of each sleeve is covered with the corresponding rubber sealing plate, and each rubber sealing plate is fixed to the corresponding underground continuous wall through the corresponding expansion bolts. The offshore deep foundation pit supporting structure has a quite excellent water stopping effect.

Description

technical field [0001] The invention belongs to the technical field of deep foundation pit construction, in particular to an offshore deep foundation pit support structure and a construction method thereof. Background technique [0002] For some deep foundation buildings with high groundwater level, difficult drainage and precipitation, or adverse impact on the environment, the excavation of foundation pit, support, basement construction and other issues are very important in the project. The correct design and reasonable construction of the basic engineering are the fundamental guarantee of the project. [0003] At present, foundation pit engineering in offshore areas usually adopts the support form of "bored piles + anchors". This form has the characteristics of simple pile formation and low cost, and is widely used in deep foundation pit engineering. However, with the continuous development of deep foundation pit projects in the direction of "bigger" and "deeper", the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04E02D5/76E02D5/20
Inventor 李琰
Owner SHANGHAI CONSTR NO 5 GRP CO LTD
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