荆门变电站膨胀土裂隙带发育深度及成因研究

Fracture development depth and its genesis of expansive soil at Jinmen Substation

荆门1 000 kV变电站工程场地地基土体中裂隙发育深度明显大于当地大气影响深度。以现场测试成果和开挖剖面观测结果为依据研究场地膨胀土的裂隙带发育深度,从地质发展历史的角度对场地膨胀土裂隙带发育的深度特征进行成因探讨,科学地解释场地裂隙带发育特征,为地基土体强度与变形参数的确定、建(构)筑物基础选型、基础埋置深度的确定等提供了可靠的依据。

The fracture development depth of foundation soil at Jingmen 1 000 kV Substation is obviously larger than climate influenced depth. Based on the field test results and excavated profiles, this paper studied development depth of fracture zone in expansive soil and discussed the genesis of fracture depth characteristics from the viewpoint of geological history, and gave scientific explanation of fracture development characteristics ; it provides a solid basis to determine the strength and deformation parameters of foundation soil and embedding depth of foundation, and to select structure foundation types.