Intelligent anchor cable system and its fixing method suitable for rock slope support and whole-process monitoring

Abstract

The invention provides an intelligent anchor rope system suitable for rock slope supporting and whole-course monitoring and a fixing method of the intelligent anchor rope system. The intelligent anchor rope system suitable for rock slope supporting and whole-course monitoring comprises an inner anchor head and an outer anchor head. The inner anchor head and the outer anchor head are fixedly connected through steel stranded wires. All the steel stranded wires are arranged in the inner anchor head in a penetrating mode, and pier heads are arranged at the inner ends of the steel stranded wires. First forcemeters are arranged between the pier heads and the inner end face of the inner anchor head. The peripheries of the steel stranded wires are sleeved with the first forcemeters, and cables of the first forcemeters are arranged in corresponding wire holes in a penetrating mode. The outer anchor head is located at the outer end of an anchor rope drilled hole and comprises an anchor pier, and the anchor pier is tightly attached to the outer wall of the anchor rope drilled hole. A base plate and an anchor plate are sequentially arranged on the outer side face of the anchor pier. A second forcemeter is arranged between the base plate and the anchor plate. The steel stranded wires sequentially penetrate through the anchor pier, the base plate and the second forcemeter, and the outer ends of the steel stranded wires are fixed to the anchor plate. The portion, located in the anchor rope drilled hole, of each steel stranded wire is sleeved with a plurality of tension sensors at intervals in the length direction, the tension sensors are covered with protective covers, and cables of the tension sensors stretch out from the outer ends of the protective covers.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a novel intelligent anchor cable system and a fixing method thereof which are suitable for rock slope support and whole-process monitoring. Background technique [0002] Prestressed anchor cables are currently the most common technical means in slope support in geotechnical engineering. Prestressed anchor cables can actively reinforce rock and soil mass, effectively increase the stability and safety factor of rock mass, and ensure the safety of project construction and operation. For example, a typical unbonded anchor cable structure such as figure 1 As shown, its main features are as follows: [0003] 1) The unbonded prestressed anchor cable uses unbonded steel strand 1', and a layer of PE plastic sleeve is placed outside the ordinary steel strand, and the inside is filled with butter, which can effectively prevent the corrosion of the steel strand ...

AI Technical Summary

Problems solved by technology

[0007] At present, the monitoring of the prestressed anchor cables used in rock slope support mainly uses the anchor cable dynamometer installed on the outer anchor head to monitor the prestress of the anchor cables, but because the unbonded anchor cables mainly use the One-time grouting construction technology, the tension of the prestressed anchor cable is carried out after the full-length grouting, and the transmission of prestress is due to the friction of the channel, so the tensile force on the deep anchor cable is smaller than that of the anchor cable near the outer anchor head. Tension force, as the depth of the anchor cable increases, the tension force on the anchor cable becomes smaller

Therefore, the results monitored by the current anchor cable dynamometer are difficult to reflect the actual working state of the prestressed anchor cable

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