特殊地层条件下井壁破裂机理与防治技术的研究（之三）

对井壁破裂后抢险加固技术措施及治理已破裂井壁的开卸压槽技术和井内破壁注浆加固地层技术进行了综述．通过模拟试验，研究了注浆加固地层法防治井壁破裂的可行性．结果表明，该方法能大大减小井壁竖直附加力，从而可根治井壁破裂．最后，指出了进一步研究的内容及方向．

Mechanism and Prevention Techniques of Shaft Lining Fracture in the Special Strata (Part Three)

The reinforcing measure, the dis stress technique of cutting slot on shaft lining and the soil reinforcing method of grouting cement from the inside of shafts, which are used for the treatment of fractured shaft lining, are introduced. Based on model tests, the possibility that the method of reinforcing soil is used for preventing shaft lining from fracturing is studied. The results show that this method can decrease largely vertical additional stress acting on shaft lining and so it can prevent shaft lining fracture. At last, its further research content and direction are pointed out.