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为了降低基坑事故发生的概率,进行基坑支护设计时一般偏保守,工程造价相对较高。以西安市某复杂条件下的深基坑工程为实例,利用实测手段和数值模拟手段得到基坑在开挖过程中变形的具体情况和变形规律,验证了原基坑支护方案的安全可靠性,在数值模拟过程中对建模和参数的选取上是合理的,在此基础上,改变锚杆和排桩的设计尺寸,模拟基坑在开挖过程中的变形,进行基坑设计优化,降低工程造价。
In order to reduce the probability of pit accidents, the design of foundation pit support is generally conservative while the project cost is relatively high. Taking a deep foundation pit project under a complicated condition in Xi’an as an example, the deformation conditions and deformation laws of the foundation pit during excavation are obtained by means of actual measurement and numerical simulation, which proves the safety and reliability of the foundation pit support scheme , It is reasonable to select the model and parameters in the process of numerical simulation. Based on this, the design dimensions of rock bolt and row piles are changed, the deformation of foundation pit during excavation is simulated, the design of foundation pit is optimized, Reduce project costs.