But if rock stratum geologic origin is complex,the complex geologic origin in simulating initial stress field should be reasonably considered.

Through the economic comparison and the security technobgy analysis,the necessity and applicability of the stoping laneway design optimization under the complex geology conditions is expatiated condsely.

The items and methods of monitoring for expressway tunnel constructed by NATM with complex geology are discussed.

Further more,the special boring methods for high side slope of complicated geology were illustrated in details.

30 m diameter and100 m hole depth) of Han River Second Bridge in Yuekou,the preparation work,construction technique measures,quality detection and control of work time of ultra-deep large diameter pile foundation construction under the complicated geology were introduced in this paper.

Construction technology and quality control of large diameter super-deep bored pile under complex geological condition are introduced.

Combined with geological and environmental condition of the ground,the author adopts reasonable gradient control and anti-collapse holes measure in construction according to design and code requirement,in order to ensure the success of bored cast-in-situ battered pile construction in complex geological condition.

This article provides various advanced and reasonable construction schemes and selection principles that suit for underground projects under complex geological conditions.

This article gives an introduction to the adoption of multi-scheme for solving the difficult issue of anti-slide pile construction under such complicated geological conditions as rich ground crevice water on land-slide body with shifting sand, mud and stony soil.