Experimental study on compressive strength of the red-bed soft rock highway tunnel´s surrounding rock

Taking typical surrounding rock of the red-bed soft rock highway tunnel for example, two representative rock samples(mudstone and muddy siltstone) along the highway tunnel´s surrounding rock are chosen to perform tests of compressive strength, by using the uniaxial compressive test and the point load test, the rock compressive strength characteristics under different weathering degree and water action are analyzed; The results indicate that the water sensitivity of mudstone is high and the Water sensitivity of muddy siltstone is blow. The compressive strength of the mudstone decreases with the weathering degree increases significantly.