论文部分内容阅读
四川甘孜州某机场跑道北端存在以砂土为主的深厚覆盖层地基,其成因及工程效应分析是机场稳定性评价的重要部分。该文在详实的现场调查和测绘基础上,通过室内颗粒分析、抗剪、化学分析试验和室外标贯、动力触探、固体体积率、载荷试验、波速测试、抽水试验等,较为系统地研究了场区北端深厚覆盖层地基的工程特征,并结合拟建项目工程特点,对其工程效应进行研究。结果表明:北端覆盖层下部为冰帽初期冰川湖积细砂层,上部为末次冰期含漂砾冰碛层;具有承载力低,地震砂土液化等工程特性。
There is a sandy soil-based deep overburden foundation at the northern end of an airport runner-up in Ganzi, Sichuan. The causes and engineering effects are important parts of airport stability assessment. Based on the detailed field investigation and mapping, this paper systematically studies the indoor particle analysis, shear resistance, chemical analysis, outdoor standard penetration, dynamic penetration, solid volume fraction, load test, wave velocity test and pumping test The engineering characteristics of the deep overburden foundation at the northern end of the field are studied, and the engineering effects of the proposed project are studied. The results show that the lower part of the north cover is the glacial sedimentary layer of glacier lake in the early ice cap, the upper part is the glacial moraine layer in the last glacial stage, and has the engineering characteristics of low bearing capacity and liquefaction of seismic sand.