swelling clay

With projects in this district, the strength, deformation and the swelling-shrinkage characteristic of the silty clay with calcium-mod-

结合区内工程对上更新统含钙结核粉质粘土的强度、变形及胀缩性进行测试分析，及时为设计、施工提供地质服务，在此基础上对其工程地质特征做探索性的总结。

The influence of meteorological conditions on the mechanical property of swelling clay is analyzed in this paper, which sums up the basic change rule of mechanical property of the clay in climatic influence zone.

由气象条件对膨胀土力学性质影响的分析，总结出土体气候影响带内土体力学性质基本变化规律。

The decrement of clay swelling in the fluid is of 80.5 %.

SCF压 裂液对粘土的防膨率为80.5%.

Invasion of drilling fluidcompletion fluid causes clay swelling and fines migration, which leads to formation damage.

钻井过程对储层的损害,主要是粘土膨胀和微粒运移造成的.