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Method for calculating vacuum preloading consolidation degree of layered foundation
The invention discloses a method for calculating vacuum preloading consolidation degree of a layered foundation. The method comprises the following steps of: (1) dividing a compression layer into a plurality of layers according to a natural horizon based on a rule of a layering method; (2) setting an attenuation value when the vacuum pressure is transmitted downwards, drawing a relation curve graph of the attenuated vacuum pressure and the depth, and calculating a stress reduction coefficient of each layer; (3) calculating the layered consolidation degree initial value of each layered foundation one by one by using a general expression; (4) calculating the settlement value of each layer and the contribution rate of each layer to the total average consolidation degree by using a special layer summation method for a vacuum preloading method; (5) multiplying the initial value of the consolidation degree of each layer by the respective stress reduction coefficient to obtain the average consolidation degree of each layer; (6) multiplying the average consolidation degree of each layer by respective contribution rate to obtain a consolidation degree contribution value of each layer; and (7) taking the sum of contribution values of the consolidation degrees of all the layers as the total average consolidation degree of the whole layer. According to the method, calculation can be completed only by using a general mathematical method and a spreadsheet, the workload is small, and the precision meets the design requirement.
本发明公开了一种成层地基真空预压固结度的计算方法，其步骤为：①按分层法的法则将压缩层按自然层位划分为若干个分层；②设定真空压力向下传递时的衰减值，绘制衰减后真空压力与深度的关系曲线图，计算各分层的应力折减系数；③用普遍表达式逐一算出各分层地基的分层固结度初值；④用真空预压法专用的分层总和法计算各分层的沉降值和各分层对总平均固结度的贡献率；⑤将各分层固结度初值乘上各自的应力折减系数，获得各分层的分层平均固结度；⑥将各分层平均固结度乘上各自的贡献率即为各分层固结度贡献值；⑦将各分层固结度贡献值总和之即为整层总平均固结度，本法只需用一般的数学方法和电子表格就可完成计算，工作量小且精度满足设计要求。
Method for calculating vacuum preloading consolidation degree of layered foundation
The invention discloses a method for calculating vacuum preloading consolidation degree of a layered foundation. The method comprises the following steps of: (1) dividing a compression layer into a plurality of layers according to a natural horizon based on a rule of a layering method; (2) setting an attenuation value when the vacuum pressure is transmitted downwards, drawing a relation curve graph of the attenuated vacuum pressure and the depth, and calculating a stress reduction coefficient of each layer; (3) calculating the layered consolidation degree initial value of each layered foundation one by one by using a general expression; (4) calculating the settlement value of each layer and the contribution rate of each layer to the total average consolidation degree by using a special layer summation method for a vacuum preloading method; (5) multiplying the initial value of the consolidation degree of each layer by the respective stress reduction coefficient to obtain the average consolidation degree of each layer; (6) multiplying the average consolidation degree of each layer by respective contribution rate to obtain a consolidation degree contribution value of each layer; and (7) taking the sum of contribution values of the consolidation degrees of all the layers as the total average consolidation degree of the whole layer. According to the method, calculation can be completed only by using a general mathematical method and a spreadsheet, the workload is small, and the precision meets the design requirement.
本发明公开了一种成层地基真空预压固结度的计算方法，其步骤为：①按分层法的法则将压缩层按自然层位划分为若干个分层；②设定真空压力向下传递时的衰减值，绘制衰减后真空压力与深度的关系曲线图，计算各分层的应力折减系数；③用普遍表达式逐一算出各分层地基的分层固结度初值；④用真空预压法专用的分层总和法计算各分层的沉降值和各分层对总平均固结度的贡献率；⑤将各分层固结度初值乘上各自的应力折减系数，获得各分层的分层平均固结度；⑥将各分层平均固结度乘上各自的贡献率即为各分层固结度贡献值；⑦将各分层固结度贡献值总和之即为整层总平均固结度，本法只需用一般的数学方法和电子表格就可完成计算，工作量小且精度满足设计要求。
Method for calculating vacuum preloading consolidation degree of layered foundation
一种成层地基真空预压固结度的计算方法
WANG ZHINAN (author) / ZHU JINGJING (author) / LIU YIPING (author) / REN YAQUN (author) / WEI HUA (author) / CHEN NIANJUN (author) / LU WEIGANG (author) / HE XIAOFEI (author) / ZHOU WEI (author) / SHEN JINRU (author)
2020-11-06
Patent
Electronic Resource
Chinese
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