Abstract: Based on the laboratory model tests on newly developed umbrella-shaped anti-float device, in-situ tests are performed in order to find out the accurate effects of practical application and value. During the in-situ tests, researches on construction techniques and comparison of load-carrying properties of the umbrella-shaped anti-float anchors are carried out. The researches on the construction techniques are mainly based on the improvement of the traditional uplift piles and anti-float anchors. Through the static loading tests, the actual practical capacity of the load-carrying properties of the new umbrella-shaped anti-float anchors can be gained. Comparative analysis on the actual value and the theoretical value is performed. The test results show that the construction techniques of the umbrella-shaped anti-float anchors are similar to those of the traditional uplift piles. Under the equivalent conditions, the capacity of the umbrella-shaped anti-float anchors is of significantly improved, and the advantages of the umbrella-shaped anti-float anchors are well confirmed.