Ishaan Uniyal, Student, Dept. of Civil Engineering, Thapar University, Punjab, India.
In this paper, construction of cross-passage for a twin tunnel system has been discussed along with problem encountered and solution adopted, by using a case history of cross passage in R.K Puram Station, being constructed by L&T-SUCG JV for CC27 of Delhi Metro. Work for the cross-passage commenced after the completion of the twin tunnel on account of ease and efficiency. Method employed for construction of the cross-passage and specifications of materials used have been reported in this paper. The paper also reports a solution adopted for mitigation of a major problem of water-logging encountered during the construction. Approach adopted to address the problem has also been reported in the paper. Efficacy of the procedure utilized and applicable conditions for same along with possible contributing factors have been indicated in the paper.