Study on reinforcement treatment of enclosure defects and descending technology of a deep foundation pit in Nanjing subway
Pit enclosure structure in engineering construction plays a role in retaining soil,stabilizing the bottom of the pit and intercepting water to ensure the safety of the construction surrounding environment and the safety of engineering construction. Nanjing metro a deep foundation pit enclosure structure defects reinforcement project as the object of study,needle project site its special complex geological conditions,combined with regional survey report,the design of the MJS full Hall reinforcement+light well point precipitation programme for structural reinforcement treatment to MJS work piles formed by the cement reinforcement soil replacement of the original soil,so as to play a role in isolating the water and improve the stability of the soil in the reinforced area. Reinforcement results show that the construction effect of this design scheme is remarkable,and there is no instability,sudden water surge and leakage during the construction process. This study has some reference value for the reinforcement treatment of enclosure defects in similar pit projects.
foundation pitenvelopereinforcement treatmentMJS methodlightweight well point descents
万方数据
维普
