Segmental loaded tunneling testing apparatus of full-face tunnel boring machine

Abstract

The invention relates to a segmental loaded tunneling testing apparatus of a full-face tunnel boring machine, which is applied to the fields of highways, railways, subways and cross-rive and oversea tunnels. The segmental loaded tunneling testing apparatus comprises a loaded cross beam, a test box, a full-face tunnel boring machine, a counter force frame, a simulated formation medium, a water pressure sensor, an arc-shaped base, a pressure-bearing diaphragm and the like, wherein the simulated formation medium is filled and compacted in the text box, a soil pressure sensor and the water pressure sensor are buried in the test box, a segmental loaded water bag is separately arranged by the pressure-bearing diaphragm; the test box consists of the arc-shaped base, a left side wall, a right side wall, a front end cover and a rear end cover which are in an integral welding structure, the loaded cross beam used for bearing counter acting force of the segmental loaded water bag is arranged on the test box by locking pins, the counter force frame and the end cover of the test box are fixed by bolts, and the full-face tunnel boring machine is arranged in a guide pipe with a sealing brush. The full-face tunnel boring machine has segmental transformation and loading functions, can simulate tunneling tests of the full-face tunnel boring machine at a time under various complicated geological conditions, avoids the movement of the test box in tunneling, and is safer and more reliable in test processes.

Description

technical field [0001] The invention relates to a segmental loading driving test device for a full-section roadheader in the fields of highways, railways, subways, and cross-river and sea-crossing tunnels, especially for simulating full-section roadheaders under high water pressure, variable ground stress, and composite geological conditions. The subsection loading tunneling test device. Background technique [0002] Full-face tunnel boring machines are the main construction equipment in the fields of highways, railways, subways and river-cross-sea tunnels. Using the segmental loading large-scale tunneling test device that can simulate high water pressure, variable ground stress, and composite geological conditions, conduct composite tunneling tests of full-face roadheaders in various geological conditions such as clay, gravel soil, pebbles, hard rock, and rich water. In one test process, the water bladder segmental loading technology can be used to apply different formatio...

AI Technical Summary

Problems solved by technology

There are complex geological conditions in many actual projects, and the ground stress is also complex and changeable. At present, the existing test equipment cannot carry out comprehensive tunneling tests of large-diameter full-section roadheaders, and cannot complete multiple geological composite tests simultaneously. The simulation test cannot complete the complete test from starting, tunneling, segment assembly to slag discharge, grouting, and receiving, and the test data deviates greatly from the actual project

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