喷锚支护与土钉墙的力学机理及适用条件

通过对普遍应用于深基坑支护的喷锚支护和土钉墙力学机理的分析和计算 ,认为喷锚支护和土钉墙各有其优点与不足。一般在土体粘性差 ,对变形位移要求较严格的情况下 ,采用喷锚支护较安全可靠 ;对粘性土的基坑 ,采用土钉墙支护 ,具有受力合理、节省造价的优点。

ACTIVE MECHANISM AND SUITABLE CONDITIONS OF CONCRETE SPRAY BOLTING AND SOILNAILING

Analysis and calculation of the active mechanism of concrete spray bolting and soilnailing which are widely used for support of deep foundation pits have come to a conclusion that each method has its own strong and weak points. The concrete spray bolting is generally suitable only to low-viscosity, high-deformation or displacement soil so that safety of foundation pit can be guaranteed. Comparatively speaking, application of the soilnailing to high-viscosity soil has many advantages of reasonably force-receiving and construction cost saving.