Comprehensive construction technology for super-long anchor cables for the cross-fault Newton force monitoring system

Abstract:

The NPR anchor cable monitoring system based on the two-body catastrophic mechanics model for interfacial Newton force measurement has been applied at many landslide sites. However， it is the first time in China that the cross-fault Newton force monitoring system for super-long anchor cables is used for early earthquake warning and scientific research. This paper， in regard to the construction of NPR anchor cables with a diameter of ?150mm， a free length of 240m and a total length of 300m for Wenshan Cross-fault Newton Force Monitoring Station CY-1 of the Seismological Bureau of Changyi city， Shandong province， introduces the comprehensive construction technologies made up of small incidence angle， large diameter and super long hole core drilling， casing while drilling， multi-performance mud wall protection， stepped borehole reaming， and the integrated cable placing and mud injection system of “wireline drill pipe+locating plate+steel strand+connector release with female thread+guiding anchor head” for such complex strata as loose pebbles and broken rocks.