Much practice has proved that the effect of cement-soil mixing pile reinforcing soft soil is well, and also has many advantages, such as simple construction, no vibration and pollution in the construction process, and no adverse impact on the surrounding environment, so this mixing pile had been widely used. At the same time testing of the quality of the pile has been of great concern. There are many detection methods at present, but each has its own shortcomings. Detection method, such as static load test method has a longer testing cycle, constrained by the duration; low-strain reflected wave method is constrained by the elastic wave propagation characteristics and excitation energy, and is difficult for discriminating out the bottom of a long pile, and is more subjected to interference factors; sonic wave penetrating method has a high cost of detection and test-tube material, and when concrete wrap around the test-tube badly or there is partial mud around the tube, it may lead to misjudge; drill core method has a slow testing speed and expensive cost and other factors. Based on previous research results, this paper uses Rayleigh surface wave method to carry out the non-destructive testing of pile foundation, presents the empirical mathematical model between the compactness and the shear wave velocity and the depth, and introduces the theory and observation systems of transient Rayleigh surface wave method used in pile foundation detection. We carried out a large number of practical applications and obtain a good application effect which could prove that the transient Rayleigh surface wave method can detect the bearing capacity and integrity of the pile more accurately, rapidly and non-destructively, and achieve the comprehensive evaluation of the pile's quality, and provide an effective method for the non-destructive testing of the pile's quality.
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