Post-construction anchor cable pre-stress monitoring installation system

The utility model relates to the technical field of anchor cable fastening, in particular to a post-construction anchor cable prestress monitoring installation system which comprises an existing anchor cable, an original anchorage device, a lengthened anchor cable, a connecting mechanism and a force application device. A connecting mechanism and a force application device are sequentially installed along the original anchorage device, the existing anchor cable is connected with the connecting mechanism through the original anchorage device, and the lengthened anchor cable is connected with theforce application device through the connecting mechanism. Through butt joint of the anchor cables, the pressure sensors are installed at the bottoms of the original anchorage devices, the underanchor stress of the bottoms of the anchor cables can be measured, long-term monitoring of the underanchor stress of the anchor cables is achieved through a signal conversion and data transmission and analysis system, the cost of