A model test system and method for the stability research of gravity anchorage under earthquake load

Abstract

The invention discloses a test system and method for studying the stability of a gravity anchorage under simulated earthquake loads, including an anchorage system, a load system, and a measurement system; the anchorage system consists of a test box, a similar rock-soil layer, and an anchorage body , steel strands, the load system includes a static load system and a dynamic load system, the static load system is composed of weights, portal loading frame, pulleys, steel strands, and the dynamic load system is composed of a vibrating table, wood boards, and sponges. The measurement system includes precision dynamometers, angle gauges, miniature pressure cells, laser rangefinders, and acoustic vibrometers. The specific operation of this system includes the following steps: making the test model, arranging the monitoring system, loading the test model, debugging the monitoring system, model test and data recording. The invention can realize the simulation of different anchorage test prototypes, simply and effectively simulate the dynamic response change of the anchorage body under the action of earthquake load, and realize the simulation of the anchorage body and its surrounding rock and soil during the loading process of the dynamic load Dynamic measurement of dynamic response data such as internal force, displacement and vibration velocity.

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...

AI Technical Summary

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 simulated seismic vibration wave dynamic load loading. , and can objectively and directly reflect the stability change law of the gravity anchor and the surrounding rock and soil under the earthquake load, and provide a basis for the safety and stability evaluation of the anchor bridge in the operation stage

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