Model test system and method for studying gravity type anchorage stability under seismic load

Abstract

The invention discloses a test system and method for studying gravity type anchorage stability under a seismic load. The system comprises an anchorage system, a load system and a measuring system; theanchorage system is composed of a test chamber, a similar rock-soil layer, an anchorage body and a steel strand; the load system comprises a static load system and a dynamic load system; the static load system is composed of a weight, a gate-type loading frame, a pulley and the steel strand; the dynamic load system is composed of a vibrating table, a wood board and a sponge; and the measuring system comprises a precise dynamometer, an angle measurer, a micro pressure box, a laser range finder and a sound wave vibration measurer. The specific operations of the system comprise the following steps: producing a test module, arranging a monitoring system, loading the test module, debugging the monitoring system, model test testing and data recording. According to the test system for studying the gravity type anchorage stability under the seismic load provided by the invention, the simulation of different anchorage test prototypes can be realized, the dynamic response change of the anchorage body under the action of the seismic load is simulated simply and effectively, and the dynamic measurement of dynamic response data such as internal force, displacement, vibration speed and the likeof the anchorage body and surrounding rock and soil bodies in the loading process of dynamic loads is realized.

Description

technical field [0001] The invention relates to the fields of bridge technology and geological disaster control, in particular to a model test system and method for studying the stability of gravity anchorage under earthquake load. Background technique [0002] As a part of the stress system of the cable-type bridge, the anchorage structure itself and the stability of the surrounding rock and soil are of great significance in the process of bridge construction and operation. Earthquake is a common geological disaster in engineering construction, and its dynamic effect will have a negative impact on the bridge anchor structure and its surrounding rock and soil, thus affecting the overall stability of the cable-stayed bridge. Among them, the gravity anchorage structure is a common form of anchorage in cable-stayed bridges. Its main function is to transfer the main cable tension transmitted from the bridge pier to the adjacent rock and soil layer, and use its own weight to gene...

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Problems solved by technology

[0004] The present invention provides a model test system and method for studying the stability of gravity anchor under simulated earthquake load. The test process is easy to operate, and the principle of controlling a single variable can be realized to solve the problem of difficult operability of simul

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