某客运专线软土地基沉降计算参数试验研究

EXPERIMENTAL STUDY ON DESIGN PARAMETER OF SETTLEMENT FOR SOFT FOUNDATION IN CERTAIN PASSENGER LINE

软土地基沉降估算的准确性及工后沉降控制的可靠性很大程度上依赖于计算参数的准确性。为了选取较合理的软基土参数,本文提出了大型平板载荷试验、静力触探、旁压试验及室内土工试验等对各类典型地基土层设计参数选取的方法,通过反演分析法对载荷试验、静力触探、旁压试验及室内土工试验结果进行验证,提出了不同地质土层设计参数的选取试验,对软土地基沉降预测具有一定的参考价值。

The accuracy of the settlement estimation and reliability of settlement control after construction for soft foundation is dependent upon the suitable settlement calculation parameter to a great extent. In order to select appropriate parameter for soft foundation, based on various kinds of typical soft foundation in certain passenger line. It puts forward a solution for parameter selection through large plate loading test,cone penetration test,pressure test and laboratory soil test. The results of plate loading test,cone penetration test,pressure test are validated by parameters back analysis methods and comparative analyses of the results with actual settlement. It proposes an effective test method to get suitable settlement calculation parameter for all kinds of soil. It is very practical to high - speed rail passenger line with strict settlement demand.