Construction method suitable for deep foundation pit support structure large in excavation area

A deep foundation pit support and construction method technology, applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of inconvenient construction on site, untimely construction support, instability, etc., and achieve shortened construction period, reduced workload, The effect of cost reduction

Inactive Publication Date: 2018-10-12
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Steel pipe braces have high requirements on construction technology. If the joints and support structures are not handled properly, or the construction support is not timely and accurate, it will caus

Method used

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  • Construction method suitable for deep foundation pit support structure large in excavation area
  • Construction method suitable for deep foundation pit support structure large in excavation area
  • Construction method suitable for deep foundation pit support structure large in excavation area

Examples

Experimental program
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Embodiment 1

[0054] see figure 1 and figure 2 , a construction method suitable for supporting structures of deep foundation pits with a large excavation area, comprising several second bored piles 4 and several third bored piles 5, the second bored piles 4 and The third bored pile 5 is constructed in the foundation pit, the second bored pile 4 forms an outer circle, the third bored pile 5 forms an inner circle, and the second bored pile 4 serves as the second inclined steel pipe support 15 is at the fulcrum of the raft foundation, and the third bored pile 5 is used as the first inclined steel pipe support 11 at the fulcrum of the raft foundation.

[0055] The construction of the second bored pile 4 and the third bored pile 5 is completed together with the enclosure structure, and the elevation of the pile top is controlled at the excavation surface of the foundation pit. After the excavation of the earthwork is completed, the first raft foundation 10 and the The second raft foundation 1...

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PUM

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Abstract

The invention relates to a construction method suitable for a deep foundation pit support structure large in excavation area. The construction method comprises the following steps that 1, the foundation pit support structure and an inclined strut support reaction structure are constructed; 2, earth unprotected open cut excavation is carried out, and a center area raft foundation is cast; 3, a first inclined steel support is mounted; 4, a second inclined steel support is mounted; 5, the second inclined steel support is demounted, a first underground body structure is constructed, and soil backfilling is carried out; and 6, the first inclined steel support is demounted, a second underground body structure is constructed, and soil backfilling is carried out. According to the construction method, underground structure raft foundations of a building under construction are effectively utilized as inner supporting points, reserved non-excavated soil is utilized periodically to form back pressure, foundation pit stability is guaranteed, cost is reduced, the construction period is shortened, and dust and noise pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, in particular to a foundation pit engineering, in particular to a construction method suitable for a deep foundation pit support structure with a large excavation area. Background technique [0002] In the process of urban development, the land is becoming more and more scarce, and the effective use of land resources is constantly decreasing, but the urban population is constantly expanding, and various projects are still in full swing, and there are two opposite development trends of underground and space. Engineering design directly leads to larger and larger foundation pit areas and deepening foundation pit depths. Deep foundation pit engineering construction has undoubtedly become the premise and foundation of various engineering constructions, and cannot be underestimated in terms of safety, quality, and construction period. [0003] In the current deep foundation pit engine...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 李利李明姚四建
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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