场地处于抗震不利地段。七.特殊性岩土该项目涉及到特殊性岩土主要为表层人工填土和软土,现分述如下:1、填土:主要为粉质粘土层,结构较松散,自立性差。该层对桩基施工和基础开挖有一定的影响,设计及基础开挖时应引起重视。2、软土:场地内分布有软~流塑状②2粉质粘土夹粉土,该土层特点是含水量高,为高压缩性土。八.岩土参数分析与选用(一)土层主要物理力学指标平均值与标准值1.主要物理力学指标平均值统计结果见表5。表5层号物理指标力学指标ω(%)γ(kN/m3)eIPILa0.1-0.2(1/MPa)Es0.1-0.2(MPa)Cq(kPa)Φq((kPa)Φc(度)②127.019.40.7678.71.060.2417.8221.822.313.028.0②230.219.00.85710.71.140.3136.2123.715.621.121.2③126.119.60.7377.71.090.1899.6614.726.012.228.6③228.019.10.8067.21.250.1949.876.629.6③329.119.30.82010.61.110.3545.3826.914.6③429.019.30.8119.61.230.2966.9722.421.2④124.320.20.68417.00.180.2207.8157.215.0④225.719.70.72610.00.710.2269.2320.721.4⑤125.020.10.70717.50.200.2128.2658.415.4⑤227.619.40.78510.00.930.2647.9519.721.2⑥125.220.00.71215.70.270.2247.9152.914.2⑥231.519.00.89212.20.940.3515.8421.714.52.土层抗剪强度指标标准值统计结果见表6。
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