Sectionalized construction method of deep and large foundation pit

A construction method and foundation pit technology, which is applied in infrastructure engineering, excavation, construction, etc., can solve the problems of excessive influence on the surrounding environment, irregular plane shape, large excavation area of ​​foundation pit, etc., and achieve convenient construction and safety High, reduce the effect of space-time effect

Inactive Publication Date: 2014-01-15
上海市建工设计研究总院有限公司
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  • Abstract
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Problems solved by technology

[0008] In view of the existing sub-pit construction method of deep and large foundation pits, because the excavation area of ​​the foundation pit is too large and the plane shape is irregular, or there are many important buildings an

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  • Sectionalized construction method of deep and large foundation pit
  • Sectionalized construction method of deep and large foundation pit

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Embodiment 1

[0032] Example 1: Combining figure 1 Illustrate the divisional construction method of the deep and large foundation pit of the present invention, this project plans to build a large-scale shopping center with seven floors above the ground and three floors underground. Triangular (with short side a, long side b, and hypotenuse c), since the excavation area of ​​the foundation pit is too large, if it is divided into east-west or north-south areas for construction according to the conventional method of pit division, although the The excavation area of ​​the deep and large foundation pit ensures the safety of the foundation pit project, but it is not conducive to the construction of the main structure and prolongs the construction period of the main structure. Adopt the partition construction method of the present embodiment, the steps are as follows:

[0033] One, according to the engineering geological conditions of the said deep and large foundation pit 100 construction site,...

Embodiment 2

[0043] Embodiment 2: Combination figure 2 Explain the divisional construction method of the deep and large foundation pit of the present invention. This project plans to build a dance center. The project foundation pit covers an area of ​​80,000 m2, and the excavation depth is 6.8m to 11.0m. The plane shape is long and the maximum span is more than 300 meters. , surrounded by 6 historically protected buildings (attached figure 2 B1-B6 in the middle), the distance from the excavation sideline of the foundation pit is the closest to only 3.7m. If the foundation pit is divided into two parts for sub-pit construction according to the conventional method of sub-pit, although this reduces the excavation area of ​​the foundation pit and increases the safety of the foundation pit, it cannot control the excavation of the foundation pit to the greatest extent. The impact of excavation on surrounding historic buildings. Adopt the partition construction method of the present embodimen...

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Abstract

The invention provides a sectionalized construction method of a deep and large foundation pit, and relates to the technical field of engineering construction of deep and large foundation pits. According to an existing construction method of the deep and large foundation pit, due to the negative factors that the excavation area of the foundation pit is overlarge, and the flat shape is irregular, or a lot of important buildings exist in the influence range of excavation of the foundation pit, the problems that influence of construction of the deep and large foundation pit on the surroundings is excessively high, and the construction period is long are caused. The sectionalized construction method of the deep and large foundation pit comprises the steps of (1) selecting the sectionalized construction method according to the engineering geological conditions of a construction field of the deep and large foundation pit, the nature of the foundation pit and the surroundings of the foundation pit; (2) dividing the deep and large foundation pit into a first foundation pit body, a second foundation pit body and a third foundation pit body, wherein the first foundation pit body, the second foundation pit body and the third foundation pit body are arranged in sequence, and the first foundation pit body and the third foundation pit body are arranged on the two sides of the deep and large foundation pit, and are not adjacent to each other.

Description

technical field [0001] The invention relates to the technical field of deep and large foundation pit engineering construction, in particular to a divisional construction method of deep and large foundation pits. Background technique [0002] With the development of urban construction, buildings are becoming more and more dense, and underground structures and above-ground buildings are interlaced, resulting in the continuous increase in the area and depth of foundation pit engineering, and the construction site is becoming more and more compact. Some places are close to the red line, making the foundation pit The surrounding construction site is very narrow, and the surrounding environment of the foundation pit is complex and sensitive, close to a large number of pipelines, important buildings and subway structures, etc., the requirements for the surrounding environmental protection are getting higher and higher. [0003] The excavation of the foundation pit will lead to chan...

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Application Information

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IPC IPC(8): E02D17/02
Inventor 阳吉宝陈建兰谢芝蕾谷远朋田全红
Owner 上海市建工设计研究总院有限公司
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