Application of compaction sand piles in soft ground improvement of highway --Taking Hanjiang River plain region as an example;

The development of a system monitoring and controlling the construction quality of compaction sand pile and its application in engineering;

By setting test section along GuangHe expressway from the end of the North River oversized bridge,standard penetration test,static cone penetration test and monitoring experiment are applied to study the reinforcement and anti-liquescence effect of the compaction sand piles used to strengthen the soft foundation.

In the meantime,issues like sand compaction piles installed betw.

Combining with the character of the seasonally frozen areas, this paper studied the behavior of soft soil improved by the powder sprayed piles and sand compaction piles through a real work.

Through construction results analysis, it summarizes the main results and characteristics of sand compaction piles in soft ground consolidation.

Based on the analysis of the liquefied mechanism of saturated sand,this paper analyzes the effect of three measures such as compacted sand pile,vibro replacement gravel column and bag sand-well.

This paper comprehensively introduces the principle and the role of compacted sand pile in the reinforcement of the soft foundation based on the construction of the second contract section of Bao-Xi Railway,and describes the existing problems and their solutions.

The application of sand-gravel compaction pile in treatment of collapsible soft roadbed;

A new method is put forward for railway foundation consolidation through introduction of sand-gravel compaction pile applied in consolidation of a railway foundation.