Novel method for processing soft soil subgrade by pile-supporting reinforcing technology

Abstract

The invention discloses a novel method for processing a soft soil subgrade by pile-supporting reinforcing technology, which comprises the following steps of: A, driving piles into the subgrade to be stabilized in a way that pile ends penetrate a soft soil layer to a supporting layer, and distributing the piles into a square; B, erecting formworks at the tops of the piles, casting in-situ reinforced concrete pile caps, bidirectionally and uniformly distributing fabric reinforcement along a full length and burying steel heads into the sections of the pile caps to distribute the steel heads intothe sections of the pile caps; C, maintaining the cast-in-situ reinforced concrete pile caps, filling embankment earth fillers among the pile caps and performing field engineering; D, before paving reinforcing materials, cleaning the top sections of the pile caps and keeping clean the top sections of the pile caps, and when paving the reinforcing materials, inserting the steel heads buried in thetops of the pile caps into reinforcing material meshes for fixation; and E, erecting the formworks above the top sections of the pile caps, casting concrete fixed ends and fixing the reinforcing materials at the tops of the piles. The method is easy and convenient to operate, and solves the problems of excessive lateral displacement of the subgrade and embankment, excessive sedimentation, excessive non-uniform sedimentation and low reinforcing material utilization efficiency in the prior art.

Description

Technical field [0001] The invention belongs to the technical field of foundation treatment, and more particularly relates to a method for treating soft soil roadbeds with a new pile-supported reinforcement technology, which is suitable for treating natural soft foundations during embankment construction, and is especially suitable for treating soft foundations under high-fill embankments. Background technique [0002] Prior to the method of the present invention, a similar existing foundation treatment technology was the pile-supported reinforced cushion method. The pile-supported reinforced cushion method composite foundation consists of the following parts: embankment fill, sand cushion, reinforcement, piles, pile caps, weak foundation, and bearing layer. The core part of this system is the pile and the reinforced cushion formed by sand cushion and reinforcement. The pile penetrates the weak foundation and falls into the lower lying bearing layer, and the reinforced cushion is...

AI Technical Summary

Problems solved by technology

The method consists of a fixing system composed of a steel head buried on the pile cap and a fixed end of cast-in-situ concrete to fix the reinforcement and the pile cap together, and the foundation fixed by the reinforcement and the pile cap is reinforced, which changes the existing technology. Through the reinforcement mechanism of the interaction between the reinforcement and the sand cushion interface, it is a good solution to the excessive lateral displacement of the roadbed and embankment, excessive settlement and uneven settlement, low utilization efficiency of the reinforcement, and tension in the existing technology. The film pulling effect is not obvious and the cost of sand cushion laying is high.

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