Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Calculation method for foundation pit excavation slope safety coefficient
The invention belongs to the field of slope safety evaluation, and particularly relates to a foundation pit excavation slope safety factor calculation method, which comprises the following steps of: firstly, vertically partitioning a sliding soil body of a foundation pit excavation slope into blocks; secondly, determining the sliding force of each block and the normal pressure of the bottom of each block according to the balance condition of the force, calculating the anti-sliding force of each block by adopting a Moore-Coulomb strength formula according to the normal pressure value, and determining the local instability coefficient of each block by utilizing the ratio of the sliding force to the anti-sliding force; then, sequentially dividing the blocks of which the local instability coefficients are greater than 1 into blocks; selecting a block with the maximum local instability coefficient; the weight is transferred to the next sub-block in the sliding direction; and iteration is carried out in this way until the local instability coefficients of the remaining blocks are all smaller than 1, finally, the ratio of the anti-sliding force to the sliding force of the blocks is synthesized, namely, the sliding soil body safety coefficient in the progressive damage process is considered, the safety coefficient calculated through the method is reasonable, accurate and visual, and the accuracy of slope safety evaluation is greatly improved.
本发明属于边坡安全评价领域，尤其涉及一种基坑开挖边坡安全系数计算方法，包括如下步骤，首先将基坑开挖边坡的滑动土体进行垂直分块；其次，根据力的平衡条件确定每个分块下滑力、分块底部法向压力，并根据该法向压力值采用摩尔—库伦强度公式计算其抗滑力，利用下滑力与抗滑力的比值确定分块的局部失稳系数；接着，依次从局部失稳系数大于1的分块中，选择局部失稳系数最大的分块，并将其重量转移至滑动方向下一分块内，如此迭代，直至剩余分块的局部失稳系数均小于1，最后，综合这些分块的抗滑力和下滑力比值，即为考虑渐进破坏过程的滑动土体安全系数，本方法计算的安全系数合理、准确、直观，大大提高了边坡安全评价的准确度。
Calculation method for foundation pit excavation slope safety coefficient
The invention belongs to the field of slope safety evaluation, and particularly relates to a foundation pit excavation slope safety factor calculation method, which comprises the following steps of: firstly, vertically partitioning a sliding soil body of a foundation pit excavation slope into blocks; secondly, determining the sliding force of each block and the normal pressure of the bottom of each block according to the balance condition of the force, calculating the anti-sliding force of each block by adopting a Moore-Coulomb strength formula according to the normal pressure value, and determining the local instability coefficient of each block by utilizing the ratio of the sliding force to the anti-sliding force; then, sequentially dividing the blocks of which the local instability coefficients are greater than 1 into blocks; selecting a block with the maximum local instability coefficient; the weight is transferred to the next sub-block in the sliding direction; and iteration is carried out in this way until the local instability coefficients of the remaining blocks are all smaller than 1, finally, the ratio of the anti-sliding force to the sliding force of the blocks is synthesized, namely, the sliding soil body safety coefficient in the progressive damage process is considered, the safety coefficient calculated through the method is reasonable, accurate and visual, and the accuracy of slope safety evaluation is greatly improved.
本发明属于边坡安全评价领域，尤其涉及一种基坑开挖边坡安全系数计算方法，包括如下步骤，首先将基坑开挖边坡的滑动土体进行垂直分块；其次，根据力的平衡条件确定每个分块下滑力、分块底部法向压力，并根据该法向压力值采用摩尔—库伦强度公式计算其抗滑力，利用下滑力与抗滑力的比值确定分块的局部失稳系数；接着，依次从局部失稳系数大于1的分块中，选择局部失稳系数最大的分块，并将其重量转移至滑动方向下一分块内，如此迭代，直至剩余分块的局部失稳系数均小于1，最后，综合这些分块的抗滑力和下滑力比值，即为考虑渐进破坏过程的滑动土体安全系数，本方法计算的安全系数合理、准确、直观，大大提高了边坡安全评价的准确度。
Calculation method for foundation pit excavation slope safety coefficient
一种基坑开挖边坡安全系数的计算方法
LI LIANG (Autor:in) / WANG SHANGSHANG (Autor:in) / CHU XUESONG (Autor:in) / ZHAI MING (Autor:in) / LU SHIBAO (Autor:in) / LIU XU (Autor:in) / HE KEQIANG (Autor:in) / YUAN CHANGFENG (Autor:in) / CHEN FU (Autor:in) / LING XIANCHANG (Autor:in)
03.07.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
G06F
ELECTRIC DIGITAL DATA PROCESSING
,
Elektrische digitale Datenverarbeitung
/
E02D
FOUNDATIONS
,
Gründungen
/
G06Q
Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke
,
DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES
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