Construction technology for cable to drill through river channel

Abstract

The invention provides a cable drilling and crossing riverway construction process which comprises the following steps: selecting a drilling guide point and a drilling exit point, and determining the coordinates of the drilling guide point and the coordinates of the drilling exit point; determining a penetrating angle of the drilling point and an unearthed angle of the drilling point; determining that the horizontal directional drill drills over the rock stratum of the river channel, the drill holes of the drill guide point and the drill holes of the drill outlet point are all located between 11.5 m and 15.6 m below the riverbed of the river channel, and the crossing layer of the horizontal directional drill drills over the river channel is located on the sandstone layer of the river channel; performing non-excavation directional drilling construction, enabling a drill bit to enter from a drilling guide point and drive a drill rod to rotate and advance until the drill bit penetrates out of the ground from a drilling outlet point, replacing the drill bit with a back-expanding head, and enabling the drill rod to pull back to the drilling guide point from the drilling outlet point with the back-expanding head; and a pipeline is fixed to the back-expanding head located at the drill guiding point, the back-expanding head drives the pipeline to move from the drill guiding point to the drill outlet point, and pipeline laying construction is completed. According to the method, the drill guiding point and the drill outlet point are selected firstly, then the crossing layer is determined, and finally non-excavation directional drilling construction is conducted, so that the problem that collapse is prone to occurring during horizontal directional drilling and hole forming is effectively solved.

Description

technical field [0001] The invention relates to the field of cable construction, in particular to a construction technology for cable drilling across a river. Background technique [0002] Under normal circumstances, when laying cables, it is necessary to bypass or erect rivers such as the Yellow River. However, whether it is detour or erection, there are disadvantages such as large project investment, long construction period and additional construction land. [0003] In order to greatly reduce the project investment, shorten the construction period and save the project land, it is urgent to develop a construction technology for cable drilling across the river, in order to open up the power transmission channel on both sides of the river. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a construction technology for cable drilling across the river, first selecting the pilot point and the exit point, then determining the crossing layer,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cable drilling construction process for crossing the river, first select the drill point and the drill point, then determine the crossing layer, and finally carry out non-excavation directional drilling construction, which effectively solves the problem that the horizontal directional drilling is difficult to form a hole. collapse problem

Images