天然围压下软弱层带的工程特性及当前研究中存在的问题分析

ANALYSIS OF ENGINEERING PROERTIES OF WEAK LAYERZONE UNDER NATURAL CONFINING PRESSURE AND THE EXISTING PROBLEMS IN PRESENT STUDIES

由于地壳岩体中三向地应力普遍以压应力方式存在，因而位于岩体中的软弱层带面上将受到三向主压应力引起的法向压应力（天然围压）的作用。本文研究了天然围压下软弱层带泥质物的工程特性与所受天然围压具有较好的对应性和相关性。指出了当前软弱层带工程特性研究中因忽视天然地应力条件而存在的问题。

Because the three dimensional geostress in crustal rockmass exists often in the pattern of compressive stress, the weak layerzone in rockmass bears normal compressive stress caused by the three dimensional geostress (natural confining pressure). In this paper, the authors study the engineering properties (physical mechanical properties) of argillaceous material in weak layerzone under the naturally confining pressure, and fine the well correlation between the engineering properties of argillaceous material at the condition of natural compression and its natural confining pressure, and then point out the existing problems in present studies on engineering properties of weak layerzone in neglecting natural geostress.