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A platform for research: civil engineering, architecture and urbanism
Method for measuring lower limit depth of self-weight collapse of large-thickness loess
The invention discloses a method for measuring the lower limit depth of self-weight collapse of large-thickness loess. The method comprises the following steps: 1, excavating an exploratory well; 2, determining a sampling depth and taking a soil sample at the corresponding sampling depth; 3, sampling the ith undisturbed soil sample by a cutting ring; 4, carrying out a consolidation test on the first cutting ring sample; 5, testing the self-weight collapsibility coefficient of the second cutting ring sample; 6, repeating the step 3 to the step 5 for multiple times until the consolidation test and the self-weight collapsibility coefficient test of the I undisturbed soil samples are completed; and 7, obtaining the loess self-weight collapse lower limit depth of the region. The method starts from the angle of total volume change of loess pores; aiming at large-thickness self-weight collapsible loess, an indoor test is adopted to determine the loess self-weight collapsible lower limit depth; a new thought and a new method are provided for determination of the loess self-weight collapsible lower limit depth, and the method has high precision, and is economical and practical and convenient to use compared with a field test pit immersion test.
本发明公开了一种大厚度黄土自重湿陷下限深度的测定方法，包括步骤：一、开挖探井；二、确定取样深度并在对应的取样深度处取土样；三、第i个不扰动土样的环刀取样；四、第一环刀试样的固结试验；五、第二环刀试样的自重湿陷系数测试；六、多次循环步骤三至步骤五，直至I个不扰动土样的固结试验和自重湿陷系数测试完成；七、获取该地区的黄土自重湿陷下限深度。本发明从黄土孔隙总体积变化这一角度入手，针对大厚度自重湿陷性黄土，采用室内试验，测定黄土自重湿陷下限深度，为黄土自重湿陷下限深度的测定提供了一种新的思路，新的方法，具有较高的精度，相比野外试坑浸水试验经济实惠，使用方便。
Method for measuring lower limit depth of self-weight collapse of large-thickness loess
The invention discloses a method for measuring the lower limit depth of self-weight collapse of large-thickness loess. The method comprises the following steps: 1, excavating an exploratory well; 2, determining a sampling depth and taking a soil sample at the corresponding sampling depth; 3, sampling the ith undisturbed soil sample by a cutting ring; 4, carrying out a consolidation test on the first cutting ring sample; 5, testing the self-weight collapsibility coefficient of the second cutting ring sample; 6, repeating the step 3 to the step 5 for multiple times until the consolidation test and the self-weight collapsibility coefficient test of the I undisturbed soil samples are completed; and 7, obtaining the loess self-weight collapse lower limit depth of the region. The method starts from the angle of total volume change of loess pores; aiming at large-thickness self-weight collapsible loess, an indoor test is adopted to determine the loess self-weight collapsible lower limit depth; a new thought and a new method are provided for determination of the loess self-weight collapsible lower limit depth, and the method has high precision, and is economical and practical and convenient to use compared with a field test pit immersion test.
本发明公开了一种大厚度黄土自重湿陷下限深度的测定方法，包括步骤：一、开挖探井；二、确定取样深度并在对应的取样深度处取土样；三、第i个不扰动土样的环刀取样；四、第一环刀试样的固结试验；五、第二环刀试样的自重湿陷系数测试；六、多次循环步骤三至步骤五，直至I个不扰动土样的固结试验和自重湿陷系数测试完成；七、获取该地区的黄土自重湿陷下限深度。本发明从黄土孔隙总体积变化这一角度入手，针对大厚度自重湿陷性黄土，采用室内试验，测定黄土自重湿陷下限深度，为黄土自重湿陷下限深度的测定提供了一种新的思路，新的方法，具有较高的精度，相比野外试坑浸水试验经济实惠，使用方便。
Method for measuring lower limit depth of self-weight collapse of large-thickness loess
一种大厚度黄土自重湿陷下限深度的测定方法
JING YANLIN (author) / HUANG WENFENG (author) / JIA ZHUOLONG (author) / ZHANG ZHIQUAN (author) / WU CHAOYI (author) / HU YONGHUA (author) / LI JIERU (author) / ZHANG XUBIN (author) / HUANG YUE (author) / ZHAO ZHUANG (author)
2020-06-02
Patent
Electronic Resource
Chinese
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