A risk assessment method for ultra-deep foundation pit construction
A risk assessment and deep foundation pit technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve the problems of risk amplification effect and assessment risk gap, etc.
Active Publication Date: 2022-04-19
CHINA RAILWAY CONSTR CORP LTD +1
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Problems solved by technology
[0005] The purpose of the present invention is to address the problems existing in the prior art, to provide a method for risk assessment of ultra-deep foundation pit construction, which solves the problem of not considering the amplification effect of risk with the increase of depth in the existing ultra-deep foundation pit construction safety risk assessment method Technical problems that lead to a large gap between the assessed risk and the actual
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Embodiment 1
[0026] The invention provides a risk assessment method for ultra-deep foundation pit construction, which can be used to consider the amplification (effect) coefficient of the risk as the depth increases during the risk assessment process of ultra-deep foundation pit construction, so that the risk assessment result is closer to reality . The implementation of this method is as follows figure 1 shown, including:
[0027] In step S101, the foundation pits are classified according to depth to obtain foundation pits of different depth levels.
[0028] According to the set depth, the foundation pit is divided into foundation pits of different depth levels. For example, a 10-meter-deep foundation pit is divided into a first-level foundation pit, and its structure is as follows figure 2 As shown; the 20-meter-deep foundation pit is divided into two-level foundation pits, and its structure is as follows image 3 As shown; the 30-meter-deep foundation pit is divided into three-leve...
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The invention relates to a risk assessment method for ultra-deep foundation pit construction, which classifies foundation pits according to depth to obtain foundation pits of different depth levels; establishes a foundation pit safety factor model; uses the foundation pit safety factor model to calculate the super-deep foundation pit in The safety factor under different depth grade conditions; according to the obtained safety factor of the depth grade foundation pit, calculate the safety factor ratio of the foundation pit to be evaluated relative to the first-level depth grade foundation pit, and use the safety factor ratio as an ultra-deep foundation pit. The risk depth magnification factor of the pit; based on the risk depth magnification factor, the foundation pit construction risk assessment model is established; the foundation pit construction risk assessment model is used to carry out risk assessment for the foundation pit to be constructed. The invention can solve the technical problem that the existing super-deep foundation pit construction safety risk assessment method does not consider the amplification effect of the risk as the depth increases, resulting in a large gap between the assessed risk and the actual risk.
Description
technical field [0001] The invention relates to the technical field of construction risk assessment of super-deep foundation pits, in particular to a method for risk assessment of ultra-deep foundation pit construction. Background technique [0002] Ultra-deep foundation pit construction is an indispensable construction link in high-rise building foundations and underground spaces. It involves multiple steps such as excavation, support, and dewatering. occur, resulting in personal and property damage. [0003] There are more and more cases of ultra-deep foundation pit engineering being constructed in complex geological environment and surrounding environment, and the foundation pit enclosure, support, and water level control are also more complicated, and the environmental protection (houses, roads, pipelines, etc.) come higher. Therefore, it is necessary to analyze and evaluate the safety risks of ultra-deep foundation pit construction, and take control measures to reduce...
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IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20
Inventor 雷升祥丁正全黄明利谭忠盛王卫东雷可李小雪
Owner CHINA RAILWAY CONSTR CORP LTD