The constitutive laws of joint material and block material can be fully considered in the model. The costof computation is low. It is a discontinuous element for displacement.
该模型能充分考虑节理裂隙材料和块体材料的本构关系，计算量不大，是一种位移不协调单元。
2
Under the former mode, the costof developing the shallow sea oilfield is very high. The long displacement well drilling technology is an effective way to solve this problem.
在以往的模式下，滩海石油开发成本较高，大位移钻井技术是解决这一问题的一种有效途径。
3
To insure advanced technology, reasonable cost, safety and quality, we have to avoid the side displacementof piles.