Model test system and method for gravity type anchorage stability research under earthquake load

Abstract

The invention discloses a test system and method for simulating gravity type anchorage stability research under earthquake load. The system comprises an anchorage system, a load system and a measurement system. The anchorage system is composed of a test box, 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; and the measurement system comprises a precision dynamometer, an angle measuring device, a miniature pressure box, a laser range finder and a sound wave vibration meter. The specific operation of the test system comprises the steps of manufacturing a test model, arranging a monitoring system, loading the test model, debugging the monitoring system, testing a model test and recording data. Dynamic measurement of dynamic response data such as internal force, displacement and vibration speed of the anchorage body and surrounding rock-soil bodies of the anchorage body in the dynamic load loading process is achieved, and a test basis and a research method are provided for further revealing gravity type anchorage stability evaluation under the earthquake load effect.

Description

technical field [0001] The invention relates to the fields of bridge technology and geological disaster control, in particular to a model test method and system 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

Images