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A platform for research: civil engineering, architecture and urbanism
Checking calculation method for pit bottom upheaval resistance stability of narrow foundation pit
The invention discloses a checking calculation method for the pit bottom upheaval resistance stability of a narrow foundation pit in a saturated viscous stratum under the condition that the embedding depth of a soil retaining component is small, and the method comprises the steps: obtaining the non-consolidation and non-drainage shear strength of a soil layer of a foundation pit site, and calculating the critical foundation pit width; and whether the foundation pit is the narrow foundation pit or not is determined according to the comparison result of the actual foundation pit width and the critical foundation pit width. When the narrow foundation pit is determined, the width of a sinking soil body is reversely solved according to the actual width of the foundation pit, the pit bottom anti-upheaval safety coefficient of the narrow foundation pit in the foundation bearing capacity mode is calculated, and then the smaller value is taken as the pit bottom anti-upheaval safety coefficient of the narrow foundation pit compared with the anti-upheaval safety coefficient of the narrow foundation pit in the arc sliding mode, so that the pit bottom anti-upheaval stability is judged. Therefore, the technical problems that in the related technology, judgment of the narrow foundation pit and selection of the slip face are unreasonable, preconditions for design checking calculation according to the narrow foundation pit are unknown, and a calculation method for the anti-upheaval safety coefficient of the narrow foundation pit in the foundation bearing capacity mode is lacked are solved.
本申请公开了饱和黏性地层中窄基坑在挡土构件嵌深较小情况下的一种窄基坑的坑底抗隆起稳定性的验算方法，其中，方法包括：获取基坑场地土层的不固结不排水剪切强度，计算临界基坑宽度，通过实际基坑宽度和临界基坑宽度的比较结果确定基坑是否为窄基坑。在确定为窄基坑时，由实际基坑宽度反求下沉土体宽度，并计算窄基坑地基承载力模式下的坑底抗隆起安全系数，再与圆弧滑动模式的抗隆起安全系数相比，取较小值为窄基坑的坑底抗隆起安全系数，以对坑底抗隆起稳定性做出判断。由此，解决相关技术中，对窄基坑的判断与滑移面的选取不合理，按窄基坑设计验算的前置条件不明，缺乏窄基坑按地基承载力模式下的抗隆起安全系数的计算方法等技术问题。
Checking calculation method for pit bottom upheaval resistance stability of narrow foundation pit
The invention discloses a checking calculation method for the pit bottom upheaval resistance stability of a narrow foundation pit in a saturated viscous stratum under the condition that the embedding depth of a soil retaining component is small, and the method comprises the steps: obtaining the non-consolidation and non-drainage shear strength of a soil layer of a foundation pit site, and calculating the critical foundation pit width; and whether the foundation pit is the narrow foundation pit or not is determined according to the comparison result of the actual foundation pit width and the critical foundation pit width. When the narrow foundation pit is determined, the width of a sinking soil body is reversely solved according to the actual width of the foundation pit, the pit bottom anti-upheaval safety coefficient of the narrow foundation pit in the foundation bearing capacity mode is calculated, and then the smaller value is taken as the pit bottom anti-upheaval safety coefficient of the narrow foundation pit compared with the anti-upheaval safety coefficient of the narrow foundation pit in the arc sliding mode, so that the pit bottom anti-upheaval stability is judged. Therefore, the technical problems that in the related technology, judgment of the narrow foundation pit and selection of the slip face are unreasonable, preconditions for design checking calculation according to the narrow foundation pit are unknown, and a calculation method for the anti-upheaval safety coefficient of the narrow foundation pit in the foundation bearing capacity mode is lacked are solved.
本申请公开了饱和黏性地层中窄基坑在挡土构件嵌深较小情况下的一种窄基坑的坑底抗隆起稳定性的验算方法，其中，方法包括：获取基坑场地土层的不固结不排水剪切强度，计算临界基坑宽度，通过实际基坑宽度和临界基坑宽度的比较结果确定基坑是否为窄基坑。在确定为窄基坑时，由实际基坑宽度反求下沉土体宽度，并计算窄基坑地基承载力模式下的坑底抗隆起安全系数，再与圆弧滑动模式的抗隆起安全系数相比，取较小值为窄基坑的坑底抗隆起安全系数，以对坑底抗隆起稳定性做出判断。由此，解决相关技术中，对窄基坑的判断与滑移面的选取不合理，按窄基坑设计验算的前置条件不明，缺乏窄基坑按地基承载力模式下的抗隆起安全系数的计算方法等技术问题。
Checking calculation method for pit bottom upheaval resistance stability of narrow foundation pit
窄基坑的坑底抗隆起稳定性的一种验算方法
SONG ERXIANG (author) / FU HAO (author) / LUO JIAQIAN (author) / LIN SHIJIE (author) / XU MING (author) / YANG JUN (author)
2023-06-23
Patent
Electronic Resource
Chinese
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