A Micropile Reinforcement Method for Controlling the Transverse Uneven Settlement of High-Speed ​​Railway Wide Embankment

Abstract

The invention relates to a method for reinforcing micro-piles to control the lateral uneven settlement of wide embankments of high-speed railways. The reinforcing method includes the following steps: leveling the surface of the foundation, filling the embankment body on the foundation, and designing micro-pile piles on the body of the embankment Point position and corresponding pile diameter, and determine the depth of micro-piles at each pile point position according to the pile point position, so that each area of ​​the designed embankment body meets the corresponding compaction standards, lay micro-pile at the pile point position, and lay on the embankment body Cushion and bedding. Compared with the prior art, the present invention uses chemically improved soil with low economic cost and poor ability to control settlement as the filling material of the embankment body, and arranges micro-piles with uniform density and length running through the embankment body under the main line. The arrangement density and depth of the micropile decrease linearly with the increase of the distance from the main line reinforcement area, which can ensure the control of the horizontal uneven settlement effect of the high-speed rail wide embankment while reducing the economic cost of the embankment, and the construction is convenient and rapid.

Description

technical field [0001] The invention relates to a method for reinforcing piles of wide and large embankments of high-speed railways, in particular to a method for reinforcing micro piles for controlling lateral uneven settlement of wide and large high-speed railway embankments. Background technique [0002] Subgrade is a common form of high-speed railway stations. There are many arrival and departure lines at special-class and first-class stations. The lateral width of the subgrade is large, and the corresponding embankment is also large in lateral width. The station of the high-speed railway is horizontal along the line. The middle part of the wide embankment is the main line for non-stop vehicles to pass quickly, and the two sides are the arrival and departure lines for vehicles approaching the platform to slow down or stop. The allowable speed of vehicles on the main line can reach 350km / h, while the allowable speed of vehicles arriving at the departure line is less than ...

AI Technical Summary

Problems solved by technology

Obviously, for the above-mentioned large high-speed railway embankment, the width of the main line in the middle is only a small part compared with the width of the entire embankment. It is too wasteful to use high-grade high-quality fillers in the middle and both ends, which will only increase the embankment. total cost of

With the requirement of more and wider station engineering construction, this uneconomical method will bring immeasurable economic burden to the construction of high-speed railway

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