自重湿陷性黄土场地的试坑浸水试验

Immersion Test of Test Pit at Self Weight Collapsible Loess Site

在郑州—西安客运专线通过的关中东部某地进行的自重湿陷性黄土场地现场浸水试验中,采用浅标点和深标点对地基土地面湿陷变形及深层湿陷变形进行了观测。该文根据实测数据对自重湿陷的发生过程进行了分析,并将现场实测结果与室内土工试验计算结果进行了对比,对比结果表明试验场地实测自重湿陷量的结果与以往对"关中地区"黄土的认识存在较大差异。该文的研究成果可供今后类似工程场地自重湿陷性评价及修订黄土规范参考。

For the building of Zhengzhou-Xi＇an passenger special line, immersion test in self weight collapsible loess is conducted at the site in the eastern of Guanzhong region, the collapsible deformation on the ground and under the ground is observed with shallow mark and deep mark method . Based on measured data, this paper analyses the developing procedure of self weight collapse, and the differences between the calculation results and the measured results are compared, the results show that the measured results of collapse settlement have great difference from the traditional knowledge about the collapsible loess in Guanzhong region. The research results might be useful to self weight collapsibility evaluation in similar sites and to revise code for construction in collapsible loeSs regions.