大渡河安宁水电站深厚覆盖层勘探技术与方法概述

An overview on technique and method of deep overburden exploration for constrction of Anning Hydropower Station on Duduhe River

本文介绍了大渡河上游安宁水电站可研阶段河床深厚覆盖层勘探所用的技术与方法,即:植物胶钻具钻进、厚壁套管跟管钻进及多级跟管钻头钻进。此外,还介绍了覆盖层钻孔孔内旁压试验和原状砂样的采取技术。在该深厚覆盖层勘探中应用的技术与方法保证了勘探工作的圆满完成,为工程设计提供了详实、可靠、全面的参数,同时也完善勘探技术与内容,提高了勘探水平,为今后的勘探工作作了相应的技术储备。

The technique and method of the deep overburden exploration for the feasibility study on the construction of Anning Hydropower Station on Daduhe River is introduce herein; i. e. plant gum drilling technology, drilling with simultaneous casing of thick-walled tube and multi-level casing drilling. Moreover, the borehole pressuremeter test and the technique for sampling of undisturbed sand for drilling in the overburden are described as well. Both the technique and method adopted during the exploration of the deep overburden have ensured the successful completion of the exploration and then provided detailed, reliable and comprehensive parameters for the project design concerned, simultaneously, perfectionized the technique and content of the exploration and enhanced the exploration level, so as to lay a basis for the technical reserves for the relevant exploration in the days to come.