Testing device for prestressed anchor group type retaining wall

Abstract

The invention provides a testing device for a prestressed anchor group type retaining wall. The testing device comprises a model box, a loading system and a prestress detection system; a filler cavity with an opening in the upper end is formed in the model box; the prestress detection system is installed in the filler cavity; the prestress detection system comprises a self-sensing anchor cable and an anchoring plate; one end of the self-sensing anchor cable is connected with the model box; the anchoring plate is installed at the other end of the self-sensing anchor cable; the loading system comprises a pressure applying piece; and the pressure applying piece is located at the opening of the filler cavity. According to the testing device of the invention, the tension change of the anchor cable is monitored in real time by using the self-sensing anchor cable, so that the stress deformation of the anchor plate retaining wall under different fillers can be effectively researched, and a model test for monitoring the tension change of the anchor cable can be facilitated; different working conditions can be formulated according to the property of the fillers, the density of the anchor plate , the magnitude of prestress, the length of the anchor cable, the load, a test period and the like to carry out the test. The testing device has the advantages of being easy and convenient to operate and high in repeatability.

Description

technical field [0001] The invention relates to a test device, in particular to a test device for a prestressed group anchor retaining wall. Background technique [0002] The anchor plate retaining wall is a light retaining wall formed by burying the anchor plate in the filler and connecting the wall with a certain length of tie rod or anchor cable. The wall surface, tie rod or anchor cable, anchor plate and filling The filler between the wall surface and the anchor plate together forms an integral wall, which stabilizes the retaining wall against the horizontal earth pressure from the rear. In actual engineering, prestress will be applied to the tie rods or anchor cables of the anchor plate retaining wall, so as to improve the deformation resistance of the anchor plate retaining wall. Compared with the traditional gravity retaining wall, the anchor plate retaining wall has the advantages of less masonry and lower cost. The components can be prefabricated in the factory to ...

AI Technical Summary

Problems solved by technology

[0004]On the other hand, the stress of the anchor cable is an important factor affecting the safety and stability of this type of retaining wall. Existing retaining wall tests are generally carried out by installing Stress rings or sticking strain gauges on the anchor cable indirectly monitor the stress state of the anchor cable. These methods are not only cumbersome to operate, but also difficult to accurately obtain the real stress of the anchor cable during the test. The error is large and the reliability of the test results is low.

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