谈预钻式旁压试验

doi:10.13722/j.cnki.jrme.2019.0738

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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

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	WANG Jili 1
	CHEN Pan 1
	LIU Jinlong 2

Cite this article:

WANG Jili 1,CHEN Pan 1,LIU Jinlong 2. Discussion on the pre-boring pressuremeter test[J]. , 2020, 39(S1): 2911-2919.

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

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