Aiming at solving the problem of ineffective treating performance due to the poor side direction leakage-proof system during the vacuum extraction construction,a new advanced technique of single-line clay soil sealing wall of mixing piles combined with inserting film is introduced in this paper.

The rehabilitation technology of gas pipeline with lining is introduced briefly, and the calculation method of parameters for gas pipeline rehabilitation with plastic lining under different corrosion situations is put forward.

Drainage well of plastic slabs can transmit wacuum but its result of consolidation is nearly the same with that of drainage well of equivalent diameter.