CAJ | 학술논문

通过珠三角地区3种典型土层，即：淤泥质土、粉细砂以及红粘土进行室内常规三轴试验与真三轴卸荷力学试验，分析探讨了不同应力路径条件下土体的力学特性，得出了侧向卸荷条件下土体的抗剪强度指标大幅度降低，且有效应力指标降低幅度大于总应力指标，粉细砂抗剪强度指标降低幅度明显大于淤泥质土与红粘土的研究结论，并以此提出珠三角地区超大软土深基坑工程设计与施工应充分考虑土体卸荷力学效应的建议。
통과주삼각지구3충전형토층，즉：어니질토、분세사이급홍점토진행실내상규삼축시험여진삼축사하역학시험，분석탐토료불동응력로경조건하토체적역학특성，득출료측향사하조건하토체적항전강도지표대폭도강저，차유효응력지표강저폭도대우총응력지표，분세사항전강도지표강저폭도명현대우어니질토여홍점토적연구결론，병이차제출주삼각지구초대연토심기갱공정설계여시공응충분고필토체사하역학효응적건의。
The conventional three axis test and unloading mechanical test of three true triaxial have been carried out for three kinds of typical soil in the Pearl River Delta,such as Silty clay,silty sand and red clay.the mechanical properties of the soil under different stress path has been discussed.some meaningful research Conclusions have been obtained.such as shear strength of soil will greatly reduced under the lateral unloading conditions,the effective stress index decrease is greater than the total stress index,the shear strength index of sand were significantly less than silt soil and red clay and so on.And then,some proposals have been put forward that the soil unloading mechanical effect should fully consid-ered on the design and construction of super soft soil deep foundation pit engineering in Pearl River Delta area.