Mixed soil extruded and cured precast pile for soft foundation treatment as well as construction method

Abstract

The invention discloses a mixed soil extruded and cured precast pile for soft foundation treatment as well as a construction method. Foundation soil is connected with drill holes which are connected with mixed soil extruded and cured precast pile bodies, the mixed soil extruded and cured precast pile bodies are connected with cement mortar through a central hole, and the cement mortar is connected with a seamless steel pipe which is connected with a grouting pipe. The construction method comprises the following steps: A, a vibrating pipe-sunk pile machine is adopted for hole forming; B, the mixed soil extruded and cured precast pile bodies are placed; C, the seamless steel pipe is placed, and a vibrating sunk pipe is pulled out; D, grouting is performed: the a seamless steel pipe is connected with the grouting pipe, pressure cement mortar is grouted into the seamless steel pipe, and the seamless steel pipe and the precast pile bodies form the integral mixed soil extruded and cured precast pile after mortar curing; E, integral construction is performed. The mixed soil pile is precast by waste construction waste and common clay, the manufacture is convenient and fast, the quality is reliable, the transport cost is reduced, modular piling construction is efficient and convenient, and the integral bearing capacity of a foundation is improved effectively.

Description

technical field [0001] The invention relates to the technical field of soft foundation treatment, more specifically to a mixed soil extruded and solidified prefabricated pile for soft foundation treatment, and also relates to a construction method for the mixed soil extruded and solidified prefabricated pile for soft foundation treatment. Background technique [0002] Soft foundation is composed of highly compressive soil layers such as silt, silty soil, flush fill, and miscellaneous fill. In the construction of highways, buildings, ports, airports, etc., there are a lot of soft foundation treatment problems. , it is necessary to solve the problems of low bearing capacity and serious deformation under load. Among the currently commonly used soft foundation treatment methods, the surcharge preloading method is simple in construction, but the construction period is long and requires a large amount of earthwork; the dynamic compaction method is simple in construction and fast i...

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that it does not use the clay that is generally available on the spot, but has a large demand for lime, and the prefabricated pile body lacks materials with strong cohesive force. The pile body must be a partial brittle material, and the length of the prefabricated pile must be Restricted, and there is no way to effectively deal with the joints, there are great doubts about its practicability, and the effect on improving the overall bearing capacity of the foundation is very limited, and the advantages of prefabricated piles have not been fundamentally utilized

This invention can improve the strength of cement-soil mixing piles, but the disadvantages are very obvious, the construction process is complicated, the quality is difficult to guarantee, and the cost is high, so the practicability is general

[0007] In addition, among the current patents on using construction waste to form piles to treat foundations, such as Wang Guangming’s method of hammer punching and expanding construction waste compaction piles (ZL: CN93109708), Wang Jizhong’s invention of using construction waste to ram and expand ultra-short special-shaped piles device (ZL: CN96207591), cast-in-place pile for construction waste bearing body rammed with heavy hammer at the bottom end of immersed tube invented by Wang Jizhong (ZL: CN1098758A), a new type of pile-forming method based on recycled aggregate of construction waste invented by Duan Baofu (ZL : CN201510122938), etc., all use the method of crushing construction waste and then compacting it in the hole. The biggest weakness in common is that the work efficiency is slow, the construction quality is difficult to control, and the pile type cannot be controlled, so the market application prospect is greatly affected.

[0008] Compared with the cement mixing pile, which is one of the most widely used in weak foundation treatment, the above inventions do not have obvious cost advantages or environmental protection advantages, and the construction technology is relatively complicated and the work efficiency is poor, so they have not been obtained in the market. good promotion app

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