Field Experimental Research on Bearing Capacity of Cast-in-Situ Piles in Xigeda-Rock

To provide a reference for the design of pile foundations of bridges on the Xichang-Panzhihua expressway being constructed,the static loading tests and researches on the axial bearing capacity of 13 cast-in-situ piles set in Xigeda-rock were carried out at Xinjiu in Panzhihua and at Puba in Dechang.Xigeda-rock is an extremely soft rock with the special behaviors of softening,mashing and collapsing due to water,and this kind of rock abounds in a region as long as 90 km along this expressway.The experimental and research results show that Xigeda-rock can be used as the ground of pile foundations,and the construction quality is extremely important to their bearing capacity.