Calculation Method of Instant Settlement of Freeway Soft Foundation in Zhujiang Delta Area
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摘要: 目前高速公路软基瞬时沉降尚无成熟的计算方法, 从产生剪切变形的主要因素入手, 同时考虑土体结构损伤、砂井加筋作用, 推导出珠江三角洲地区高速公路软基瞬时沉降的计算关系式.根据填土荷载大于或小于Pc的两类情况而得到各自的计算公式, 并利用实测资料进行反馈分析得到经验系数.5个断面的计算表明, 所得计算公式是可信的.Abstract: At present, no perfect calculation method has been found for the freeway soft foundation instant settlement quality. This paper tries to establish a calculation formula of the freeway instant settlement quality in Zhujiang delta area by starting with the main factors leading to shear deformation, and considering soil structure damage and sand well restraining displacement of soft foundation. Two calculation formulas have been obtained according to the loading larger than P c and the loading smaller than P c. Also experience coefficient was attained by the analysis of the practical data. The engineering example proves that this method is credible.
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Key words:
- freeway /
- mar theory /
- instant settlement /
- structural soft soil
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表 1 各处理方案的α值
Table 1. Values of α of each treatment plan
表 2 计算值S∞和实测值S∞*的比较
Table 2. Comparison of calculated S∞ with measured S∞*
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