D K Gautam, Retired Scientist, CSIR-CBRI, Roorkee.
Trenchless construction is a method of laying services under the ground without disturbing the surface structures. The imported underground horizontal drilling machines are available in high capacities and suitable for large size bores only. There is a need for making small size bore under the ground in construction industry and no small capacity machine is available. To cater the need, an underground horizontal boring machine has been developed at the Institute, specifically, for construction activities such as laying sewer pipelines, conduits, water pipe line etc. The same has been described in this paper. The machine is capable of making horizontal bores in dry state using open flight auger as well as in wet state using a cutter along with water jet. The developed machine is capable to carry out the under ground jobs effectively which cater the needs of small to medium contractors engaged in building and allied construction activities such as laying sewer pipe lines, conduits, electric cables, water pipe lines etc. under building and roads.