Study on bearing capacity of debris foundation in new Fengjie city;

The characteristics of debris and the differences between debris and general soil were introduced.

The application of cone dynamic penetration test method to geotechnical exploration in gravel soils;

Stability analysis of gravel soil tunnel by three-dimensional discrete element method;

Based on the ponding loading test of Gannan 330kv transformer substation s foundation,the collapsible mechanics of gravel soil is analyzed by the structure theory of soil s collapsible deformation and the main factors of gravel soil s collapsible distortion.

Experiment research on shear strength index of gravel-soil in Three-Gorge reservoir area;

With the in-situ gravel-soil as trial materials,mean gradation is determined by particle size analysis.

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.