Application of jet grouting to treatment of PHC tube pile foundation on boulder mezzanine;

The design and handle method are discussed of this type of pile after it encounteres boulder mezzanine under the pile end.

In this paper, concerning the characters of clay solitary stone tunnel’s wall rocks in Laoguanzhai of Nei-Kun Railway, construction pre-control, monitoring and measurement have been adopted, ensuring the tunnel’s support stability and construction safety.

This paper introduces the reinforcement treatment method of the solitary stone by high-pressure rotary spraying in the construction of PHC piles.

Considering the distribution and character of the solitary stone is very misproportion therefore,the feasibility of engineering construction and the selection of base foundation are specially discussed in this paper,the result is hoped some reference to the engineering construction in this area.

Excavating Technology of Small-profile Tunnel within the Stratum of Soft Flowable Plasticity with Boulders;

Distinguishing and Treating of Boulder Coming Accross in Construction of Bored Pile in Soft Soil Area

In the paper,the qualifications for the breaking of the boulders directly by shield machines are studied by means of analysis on the boulder/soil mechanics.