Method for supporting deep building pit using non bulit-in end pile anchor in combination with anchor slab wall

A deep foundation pit support and anchor plate wall technology, applied in sheet pile wall, excavation, foundation structure engineering and other directions, can solve the problems of shallow burial depth, long construction period, multiplied cost, etc., so as to shorten the construction period and save money. Significant cost and duration benefits

Inactive Publication Date: 2008-08-27
青建集团股份公司 +1
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AI Technical Summary

Problems solved by technology

The geological conditions in coastal areas such as Qingdao are relatively complex, and the buried depth of rock strata is relatively shallow. Underground diaphragm walls and soil nailed walls are not suitable for foundation pits. However, the use of row piles or pile-anchor composite structures for support has long construction periods and high cost. Doubling and other issues

Method used

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  • Method for supporting deep building pit using non bulit-in end pile anchor in combination with anchor slab wall

Examples

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Embodiment 1

[0013] Please refer to the attached drawing of the manual, a deep foundation pit support method using non-embedded end pile anchors combined with anchor plate walls. The depth of the support pile 1 only enters the pressure zone of the strong weathered rock, and the support piles are poured with long auger drill holes. Concrete technology construction; high-pressure jet grouting piles 7 are set between the support piles 1; foundation pit 2 is excavated, and prestressed anchor rods 3 are respectively installed at the upper, middle, and lower ends of the support piles along with the excavation of the foundation pit; A rock step 4 of 0.5-1.0 m is reserved at the lower end; the side of the foundation pit below the rock step 4 is shotcrete retaining wall 5, and a prestressed anchor rod 6 is set on the concrete retaining wall to form a supporting anchor plate wall.

[0014] Specific steps are as follows:

[0015] 1. Construction of support piles (long auger drilling concrete process)...

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Abstract

The invention discloses a deep foundation pit support method using a no build-in end piled anchor to combine with an anchor plate wall, which is characterized in that the depth of a retaining pile only enters into an upper pressing belt of a strong weathered rock. Foundation pit excavation and prestressing anchors are respectively arranged on the upper end, the middle portion and the lower end of the retaining pile along with the foundation pit excavation, and 0.5-1.0m rock step which is obligated on the lower end of the retaining pile. A concrete retaining wall is jetted on the side surface of a foundation pit which is arranged under the rock step, the prestressing anchors are arranged on the concrete retaining wall, and a retaining anchor plate wall is formed. Comprised with a row pile or a piled anchor retaining mode, the deep foundation pit support method has the advantages of saving cost and reducing construction period.

Description

technical field [0001] The invention relates to a construction method of a deep foundation pit under the condition that the geological conditions are relatively complicated and the buried depth of the rock strata is relatively shallow, and in particular relates to a construction method of the foundation pit support structure. Background technique [0002] There are more and more high-rise and super-high-rise buildings in modern buildings, and the corresponding basements are getting deeper and deeper. The design and construction of deep foundation pit support projects are becoming more and more important. According to the different geological conditions, the design generally adopts row piles, pile-anchor composite structures, underground diaphragm walls, soil nail walls, etc. to solve the problem of foundation pit support. The geological conditions in coastal areas such as Qingdao are relatively complex, and the buried depth of rock strata is relatively shallow. Underground d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D5/76E02D5/34
Inventor 张同波孙吉会李尊强
Owner 青建集团股份公司
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