Embankment reinforcing system for liquefiable site reinforced gravel pile composite foundation and reinforcing method

Abstract

The invention belongs to the field of foundation reinforcing engineering, and relates to an embankment reinforcing system for liquefiable site reinforced gravel pile composite foundation and a reinforcing method. The reinforcing system involves two-way reinforced gravel piles, a sheet pile wall, a geotextile cushion layer, a geogrid reinforced gravel cushion layer, a horizontal drainage channel, drainage ditches, a sand cushion layer, an embankment filling layer and an asphalt concrete surface layer, wherein the reinforced gravel piles are constructed through a vibroflotation method and are arranged in a square shape to form a vertical drainage channel, the geotextile cushion layer, the geogrid reinforced gravel cushion layer and a second geotextile cushion layer are sequentially laid on the upper portions of the two-way reinforced gravel piles to jointly form the horizontal drainage channel, the drainage ditches are formed in the two sides of the horizontal drainage channel, the sand cushion layer is arranged at the top of the horizontal drainage channel, and finally, the embankment filling layer is built on the top surface of the sand cushion layer. The embankment reinforcing system for the liquefiable site reinforced gravel pile composite foundation and the reinforcing method are easy and convenient to construct, short in construction period, low in cost, higher in bearing capacity and liquefying resistance, the embankment reinforcing system for the liquefiable site reinforced gravel pile composite foundation and the reinforcing method which are economical and efficient are provided.

Description

Technical field [0001] The invention belongs to the field of foundation reinforcement, and more particularly to a reinforcement system and reinforcement method of a liquefied field plug-in gravel pile composite ground. Background technique [0002] my country's earthquake activity is more frequent, high strength, wide distribution, and severe earthquake. my country is close to more than 1 / 3 of the country, 1 / 2 city and more than 2 / 3 cities located 7 degrees and 7 degrees or more high intensity zone. The earthquake has caused huge disasters, especially the foundation liquefaction problems caused by the earthquake. The damage caused by seismic liquefaction mainly includes lateral flow and displacement caused by seismic liquefaction, as well as liquefied sprinkling and uneven sedimentation. [0003] Due to the low strength of the liquefied foundation (loose soil, powder, the sedimentation, the ground soil may liquefaction in the earthquake, and loss of shear strength and load capaci...

AI Technical Summary

Problems solved by technology

Reinforced crushed stone pile technology is a foundation treatment technology developed on the basis of crushed stone pile technology. By wrapping reinforcement materials around the crushed stone pile, the lateral restraint of the pile body is significantly improved, and the pile is further improved. The stiffness and bearing capacity of the body, most of the existing designs consider its application in soft soil foundations, but it is relatively scarce in liquefiable sandy soil foundations

Images