矩形独立承台受柱冲切模型在岩溶塌陷计算中的应用

Application of Pole Punching Model with Rectangular Independent Pile Cap in Karst Collapse Calculation

结合"湘中岩溶塌陷调查项目"成果及认识,将岩溶塌陷划分为土洞发育、地面塌陷、坑壁趋稳三个阶段;通过引入基础工程学领域的矩形独立承台受柱冲切计算模型,经一定推导得出岩溶地面塌陷阶段的计算公式,并对该公式的力学意义进行了简要分析;最后以湘中典型地区岩溶塌陷为实例,对该岩溶地面塌陷计算公式进行了验证。结果表明:公式计算结果与实际情况基本相符,表明该公式可以应用于岩溶地面塌陷的预测,但需进一步验证公式的适用性和正确性,以期为岩溶塌陷灾害的防治提供依据。

Combined with the results and understanding of the investigation project of the karst collapse in the middle of Hunan Province,this paper divides the karst collapse into three stages:soil hole development,ground subsidence and wall stabilization.By introducing the rectangular pillar in the field of basic engineering,the paper deduces the calculation formula of the karst ground subsidence stage and analyzes the mechanics significance of the formula.Finally,the paper verifies the model by a karst collapse in the middle of Hunan Province.The calculated result agrees with the actual result,indicating that the formula can be applied to the karst collapse calculation but its applicability and correctness needs to be further verified.