Abstract:

The section from Shiliuzhuang road toYuquanying transfer station of the power transmission tunnel from Nanyuan transfer station toYuquanying transfer station passes underneath old houses of local residents. In order not to remove the houses during the tunnel construction, the composite construction technology of TGRM advance deep hole grouting and soletanche grouting is used to execute horizontal advance grouting reinforcement. The construction practice shows that due to the composite grouting technology adopted, "zero" settlement is ensured during tunnel construction and the house removing cost is saved.

Key words: power transmission tunnel, tunneling underneath residential houses, soletanche grouting, composite grouting technology, TGRM grout