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Method for determining allowable value of pit bottom upheaval deformation
A pit bottom upheaval deformation allowable value determination method belongs to the technical field of safety assessment and disaster prevention and control of foundation pit excavation engineering construction, and comprises the following steps: step 1, establishing a foundation pit excavation model, and calculating a foundation pit upheaval resistance stability safety coefficient; 2, in PLAXIS 2D finite element calculation software, a foundation pit excavation mathematical model is established, the upheaval deformation value d of a monitoring point is calculated, and a point with the maximum upheaval deformation value is screened out to serve as a feature point; and 3, finally, according to the failure probability under a certain anti-upheaval stability safety coefficient limit value, determining a pit bottom upheaval deformation allowable value under the same failure probability. According to the method, the anti-upheaval stability safety coefficient and the pit bottom upheaval deformation value are combined, and the pit bottom upheaval deformation allowable value under different conditions is determined by considering different regional specifications and different projects.
一种坑底隆起变形允许值确定方法，属于基坑开挖工程施工安全评估与灾害防治技术领域，包括如下步骤：步骤1、建立基坑开挖模型，计算该基坑抗隆起稳定安全系数；步骤2、在PLAXIS 2D有限元计算软件中，建立基坑开挖数学模型，计算监测点隆起变形值d，并筛选出隆起变形值最大的点作为特征点；步骤3、最终依据某抗隆起稳定安全系数限值下的失效概率，确定相同失效概率下的坑底隆起变形允许值。本发明将抗隆起稳定安全系数和坑底隆起变形值结合起来，考虑不同地区规范以及不同工程确定不同情况下的坑底隆起变形允许值。
Method for determining allowable value of pit bottom upheaval deformation
A pit bottom upheaval deformation allowable value determination method belongs to the technical field of safety assessment and disaster prevention and control of foundation pit excavation engineering construction, and comprises the following steps: step 1, establishing a foundation pit excavation model, and calculating a foundation pit upheaval resistance stability safety coefficient; 2, in PLAXIS 2D finite element calculation software, a foundation pit excavation mathematical model is established, the upheaval deformation value d of a monitoring point is calculated, and a point with the maximum upheaval deformation value is screened out to serve as a feature point; and 3, finally, according to the failure probability under a certain anti-upheaval stability safety coefficient limit value, determining a pit bottom upheaval deformation allowable value under the same failure probability. According to the method, the anti-upheaval stability safety coefficient and the pit bottom upheaval deformation value are combined, and the pit bottom upheaval deformation allowable value under different conditions is determined by considering different regional specifications and different projects.
一种坑底隆起变形允许值确定方法，属于基坑开挖工程施工安全评估与灾害防治技术领域，包括如下步骤：步骤1、建立基坑开挖模型，计算该基坑抗隆起稳定安全系数；步骤2、在PLAXIS 2D有限元计算软件中，建立基坑开挖数学模型，计算监测点隆起变形值d，并筛选出隆起变形值最大的点作为特征点；步骤3、最终依据某抗隆起稳定安全系数限值下的失效概率，确定相同失效概率下的坑底隆起变形允许值。本发明将抗隆起稳定安全系数和坑底隆起变形值结合起来，考虑不同地区规范以及不同工程确定不同情况下的坑底隆起变形允许值。
Method for determining allowable value of pit bottom upheaval deformation
一种坑底隆起变形允许值确定方法
LI LIANG (author) / MENG KAIQI (author) / ZHOU ZHAOLIANG (author) / LI HUI (author) / WANG MINGHAO (author) / CHU XUESONG (author) / CAO YUQING (author) / WANG CHAO (author) / CAI FENGZHEN (author) / XU LIANG (author)
2023-03-07
Patent
Electronic Resource
Chinese
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