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以国电民众燃气热电冷多联供项目为依托,在研究场地地质特征及及浅层生物气成因的基础上,分析了浅层气对砂土力学特性的影响,探讨了非饱和土抗剪强度理论对含浅层气砂土的适用性,并结合电厂桩基设计选型,建议给出了PHC桩及钻孔灌注桩两种桩型在位于含浅层气砂土区域施工中的应对措施。研究成果对含浅层气砂土场地勘察及桩基施工有一定的参考作用。
Based on the geologic characteristics of the site and the genesis of shallow biogas, the influence of shallow gas on the mechanical properties of sand is analyzed. The influences of shallow gas on the shear strength of unsaturated soils Theory and its applicability to shallow sandy soil, combined with the selection of power plant pile foundation design, it is suggested that the two kinds of PHC pile and bored pile in the construction of shallow sandy soil area in the response measures . The research results have some reference to the site investigation and pile foundation construction of shallow sandy soil.