Bidirectional drilling construction method of non-demolition water drill for pipe-jacking in solid rock sections

Abstract

The invention relates to a bidirectional drilling construction method of a non-demolition water drill for pipe-jacking in solid rock sections. The method includes the steps of firstly conducting surveying and setting-out to draw a center line and boundary lines; digging operation holes which can satisfy strength demands of pipe-jacking of casing pipes and conducting reinforcement construction on the operation holes in the both ends of a crossing section; utilizing the water drill to drill and form an annular crossing surface separated from the rock bodies; cleaving rock and delivering the cleaved rock out of the hole body. By adopting the bidirectional drilling process of the water drill, hole penetration can be completed safely and efficiently in the solid rock sections, and the process has the advantages of being advanced, simple in construction process, high in construction speed and reasonable in price, providing no potential safety hazards for overground roads, requiring less investment of equipment and workers and the like.

Description

technical field [0001] The invention belongs to the construction field of long-distance natural gas pipelines, and relates to a construction method for two-way drilling with a non-blasting water mill drill for pipe jacking in a rocky section. Background technique [0002] With the development of my country's transportation infrastructure, in the bridge structure, water-milled bored piles will be applied to highway bridges and other fields. The method of water mill drilling is to drill the surrounding rock core along the retaining wall direction in the hole, and loosen the middle rock strata after penetration. Due to the dependence on natural gas and other energy sources at home and abroad, the natural gas business continues to expand, and the long-distance pipeline construction tasks for supporting energy transmission continue to increase. There are more opportunities for long-distance pipelines to cross rivers, lakes, highways, and railways, and water mill drilling construc...

AI Technical Summary

Problems solved by technology

In the traditional non-excavation technology, the static blasting method is often not accepted by the property rights unit, and there are great potential safety hazards; the mud-water balance method and the earth pressure balance method are limited by the characteristics and principles of their own construction methods, and cannot be used in rocky areas. Large, underground uncertainties

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