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一、压水试验和岩石的一般渗透特性作为坝堰工程水文地质条件的研究来说,主要的应该从两个方面来对地下水进行分析与测定:分析工区范围内地下水的化学成分,判明其地于混凝土和金属是否有腐蚀性,从而选择不同种类的混凝土或其他有效的防御措施;测定地下水的埋藏深度及渗透情况,查明其是否随深度作规律性的变化,从而决定基础岩石灌浆幕的下置深度与其方式。本文所要介绍的曲线图,就是针对后一课题来谈的。地下水的存在与活劫,首先决定于岩石的孔隙度。岩石的孔隙度,一般是由浅而深逐渐减小的。这和压力随深度增加、地表岩石的风化作用有关,而岩石的结构和构造破坏程度,对地下水的活劫,则有更大
First, the water pressure test and the general permeability characteristics of rock As the study of the hydrogeological conditions of dam projects, the main analysis and determination of groundwater should be from two aspects: analysis of the chemical composition of groundwater within the scope of the work area, and determine its location As to whether the concrete and metal are corrosive, so choose different types of concrete or other effective defense measures; determine the depth of burial and penetration of groundwater, and find out if it changes regularly with depth, so as to determine the foundation rock grouting curtain Under depth and its way. The graph to be introduced in this article is for the latter topic. The existence of groundwater and live robberies are determined first of all by the porosity of the rock. The porosity of rocks generally decreases from shallow to deep. This is related to the increase in pressure with depth and the weathering effect of surface rocks, while the degree of structural and structural damage of rocks and the looting of groundwater are greater.