Prefabricated mushroom-shaped pile cap for pile-supported reinforced embankment

Abstract

The invention discloses a prefabricated mushroom-shaped pile cap for a pile-supported reinforced embankment. The prefabricated mushroom-shaped pile cap is characterized in that a prefabricated pile cap comprises a base platform, wherein the upper surface of the base platform protrudes upwards to form a cambered surface, and the cambered surface uniformly and excessively extends to the edge of theupper surface of the base platform from the top of the upper surface of the base platform; a reserved pile hole is formed in the lower surface of the base platform, and the top end of a rigid pile isembedded into the reserved pile hole to be detachably connected with the prefabricated pile cap; and the upper surface of the base platform is tightly attached to a geotechnical reinforcing rib. The pile cap structure can form an arc-shaped structure at the top end of the rigid pile of the pile-supported reinforced embankment, promotes the deformation of the geotechnical reinforcing rib, can promote the exertion of the soil arching effect and the reinforcement effect, and can prevent the geotechnical reinforcement from being damaged at the edge of the pile cap due to overlarge local strain.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering foundation treatment, in particular to an assembled mushroom-shaped pile cap of a pile-supported reinforced embankment. Background technique [0002] The pile-supported reinforced embankment mainly includes two parts: the lower rigid pile composite foundation and the upper reinforced embankment. Most of the embankment load and traffic load are transferred to the rigid piles through the embankment soil arch effect and reinforcement effect, and then transferred to the foundation. Therefore, the pile-supported reinforced embankment has the advantages of fast construction, high bearing capacity, small total settlement and good stability, and is widely used Soft soil foundation treatment projects along (high-speed) railways and (high-speed) highways. Setting "pile caps" (or "caps") on the pile tops can concentrate more embankment loads on the pile tops, expand the pile-to-soil load ra...

AI Technical Summary

Problems solved by technology

In order to improve the above shortcomings of time-consuming maintenance of cast-in-place pile caps and poor quality controllability, the industry has proposed a variety of prefabricated pile cap devices for composite foundations, providing more possibilities for improving pile cap installation efficiency and quality control

However, the improved form of the existing pile cap only considers the characteristics of "prefabricated assembly", and the top surface of the pile cap is flat, without further consideration of how to promote the soil arch effect and reinforcement effect in the pile-supported reinforced embankment

In addition, the geotechnical reinforcement laid on the top of the pile will deflect under the upper load in the later stage, and the local strain of the geotechnical reinforcement at the edge of the pile cap will increase sharply, which is not only prone to damage, but also not conducive to the overall strength of the geotechnical reinforcement.

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