Construction method of premixing pouring soil cement pile used for strengthening ground and pile produced thereby

Abstract

The invention discloses a construction method for pre-mixing pouring cement soil pipe used for reinforcing foundation and a pile formed by the construction method. Firstly, after the cement, soil, sand and the like are uniformly mixed with water by a forcible mixer, an internal pumping method is used for construction by a long spiral pipe; the problems that the pile-forming quality of the normal cement soil mixing pile is not easy to be controlled, the pile strength is low and the pile-forming depth is limited are thoroughly changed by ensuring the mixing uniformity, controlling the water-binder ratio, improving the soil quality and increasing the effective disposal depth and the like. Compared with the conventional cement soil mixing pile, the pile body strength can be improved by more than 3-5 times, the disposal depth can achieve 30m, and the CFG pile can be replaced for the engineering where the settlement is strictly controlled.

Description

technical field [0001] The invention relates to a foundation treatment method, in particular to a construction method of a ready-mixed perfusion cement-soil pile for foundation reinforcement and the resulting pile. Background technique [0002] In the prior art, the cement-soil mixing pile uses a deep layer mixer to spray pure cement slurry slurry into the foundation while drilling and stirring, and solidifies the foundation soil in the depth of the foundation into a solid structure with sufficient strength, deformation modulus and stability. Cement soil, so as to achieve the purpose of foundation reinforcement. However, the quality of the pile is not easy to control and the strength of the pile is low, and the machine cannot penetrate the hard interlayer in the formation, thereby limiting the scope of its application. Studies have shown that there are many factors that affect the pile quality of cement-soil mixing piles, mainly the following aspects: [0003] 1. The unifo...

AI Technical Summary

Problems solved by technology

[0004] 2. When the water content of the foundation soil is high, the strength of the cement soil after pile formation is low

[0005] 3. The higher the corrosive level of groundwater, the lower the strength of cement soil after pile formation

[0006] 4. The greater the content of organic matter in the foundation soil, the lower the strength of cement soil after pile formation

[0010] Because the pile-forming method of the cement-soil mixing pile in the prior art is to solidify the foundation soil on the spot deep in the foundation by spraying pure cement slurry slurry, which is generally used for soft soil foundation treatment, the pile quality is difficult to control and the pile strength is low. The problem

The cast-in-situ pile uses concrete as the pouring material, and the cost is too high for places where the foundation strength is not too high.