谈预钻式旁压试验

doi:10.13722/j.cnki.jrme.2019.0738

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摘要预钻式旁压试验(PBPMT)获取的岩土体力学参数(极限压力、旁压模量等)受试验设备类型、试验方法、土性及资料整理方法等影响。针对当前国内旁压试验所使用的试验设备及试验过程中所依据的国家规范、行业标准及手册等，通过对比分析这些规定对旁压试验测试方法及数据整理方法等要求的异同；进一步对如何获得高质量的试验钻孔、旁压试验每级加载稳定时间、仪器综合变形率定试验中加载分级、旁压试验资料整理过程中曲线的作图方法及旁压模量的计算公式等关键问题展开研究，研究结果表明：(1) 可以用试验孔直径(Dw)与旁压探头直径(Ds)之比评价测定的旁压曲线质量。(2) 采用钻孔半径变化量与探头半径之比与压力的旁压关系曲线可以对不同仪器型号及不同探头尺寸等所获得的旁压试验结果进行归一化对比分析。研究成果可供旁压试验标准及规范编写、从事旁压试验研究及技术人员提供有价值的参考。

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	王吉利1
	陈盼1
	刘金龙2

关键词 ：土力学, 预钻式旁压试验, 成孔质量, 规范, 率定, 旁压曲线

Abstract：The mechanical parameters of the rock and soil, such as limit pressure， pressuremeter modulus obtained by pre-boring pressuremeter test(PBPMT) are affected by many factors，including the equipment types， measured method，soil properties and data processing method. In this article，based on the current national standards，professional standards and handbooks for the domestic pressuremeter test，the different requirements between standard and regulations on the pressuremeter test and data processing methods were analyzed. Furthermore，a series of important issues for the pressuremeter test are studied，including how to obtain a high quality test hole，stability time of loading at each stage during the pressuremeter test，loading series for the comprehensive deformation calibration test on the equipment，the drawing method for pressuremeter curves and the calculation formula of the pressuremeter modulus. The results show that (1) the ratio of the test hole diameter(Dw) to the diameter of the probe(Ds) can be used to evaluate the quality of the measured pressuremeter curve. And (2) the relationship between the ratio of the radius of the test hole and the probe and pressuremeter pressure can be used to analyze the pressuremeter test results uniformly，which are obtained by using different equipment types and sizes of probes. These results can be regarded as evidences for the improvement of the standards and specifications for the pressuremeter tests in the future. Also the results can offer some valuable references for the technicians and researchers who are engaged in pressuremeter tests.

Key words： soil mechanics pre-boring pressuremeter test pore-forming quality criterion calibration pressuremeter curve

引用本文:

王吉利1，陈盼1，刘金龙2. 谈预钻式旁压试验[J]. 岩石力学与工程学报, 2020, 39(S1): 2911-2919.
WANG Jili 1，CHEN Pan 1，LIU Jinlong 2. Discussion on the pre-boring pressuremeter test. , 2020, 39(S1): 2911-2919.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0738 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/IS1/2911

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