Grouting for retaining wall movement control of a deep excavation in soft clay

Three layout patterns of grout zone were adopted to reduce the excavation induced settlement of neighbouring buildings in soft clay. It was found that installing buttress type grouted panels in front of the retaining wall or increasing the bending rigidity of the retaining wall could effectively control the inward deflection of the retaining wall. In addition, pumping induced consolidation of the soft clay could also reduce the wall deflection but the associated surface settlement was substantial.

• 1 Introduction

• 2 Site conditions

• 3 Retaining and monitoring systems

• 4 Soil improvement programme

• 5 Monitoring results

• 6 Conclusions

• 7 Acknowledgements

• References