Drilling in breakstone or pebble,We should not run after drilling depth blindly,And we can not ust the old casing pipe and the new casing pipe in the same time when we drill in deep drill hole,we must strictly control to drill slanting.

Field tests of saturated and unsaturated hydraulic parameters of gravelly soil in Xietan landslide;

In order to ensure the construction security in the gravelly soil accumulation body,it is necessary to insist on the following construction principles:reducing the perturbation onto wall rocks;preserve first before dig;confined support and so on,furthermore,using umbrella arch and heading slope at the tunnel end,pre-grouting at surface,adopting secondary liner construction technique.

Three-dimensional numerical simulation of ground deformation of high-fill block and detritus;

Study on deformation of ground under high fill of block and detritus;