Construction method of bagged sand drain of height-limited highway section

Abstract

The invention relates to a construction method of a bagged sand drain of a height-limited highway section. A regular sand drain pile engine is reformed and the construction by a sleeve barrel tube connection method is adopted. The technical process is as follows: measuring and putting samples, mechanically aligning and positioning, connecting tubes in sections; sinking to the design depth, putting a sand drain, lifting the tubes, discharging the tubes in sections and moving the pile engine. The construction method comprises the concrete steps: determining the height of a tower frame of the sand drain pile engine according to side conditions; installing a working platform on the tower frame; determining the length of each tube of the sand drain as 2-4 m; installing a sleeve barrel on the upper end of each tube; inserting the upper tube into the sleeve barrel of the lower tube; installing a tube shoe on the bottom sand drain tube; installing earring tied steel wire ropes on each sleeve barrel; installing a steel column and a hanging hook under a vibrating hammer; extending the steel column under the vibrating hammer into the sleeve barrel of the sand drain tube for sinking; putting a sand drain bag after drilling to the design depth in sections; lifting the steel wire rope tied on the bottom sand drain tube in sections by the hanging hook of the vibrating hammer and discharging the sand drain tube in sections. By adopting the construction method, the problem of the bagged sand drain of height-limited highway section construction is solved without influening the safety of nearby buildings.

Description

technical field [0001] The invention relates to a novel construction method of a bagged sand well, in particular to a construction method of a bagged sand well in a limited-height road section, and belongs to the technical field of foundation and foundation engineering construction. Background technique [0002] A large number of soft soil foundations are distributed in coastal areas. Due to the insufficient natural bearing capacity of soft soil foundations, it is necessary to strengthen the soft soil foundations. The bagged sand well method has the characteristics of low cost and is widely used. [0003] In recent years, due to the rapid development of infrastructure, in some projects that use bagged sand wells to treat soft soil foundations, the erection of sand well construction equipment often encounters high-voltage lines or other building facilities. In order to solve this problem, People usually consider removing the height limiter or changing to other soft ground tr...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a construction method for bagged sand wells in the height-limited road section. The technical construction method is difficult to construct or needs to use other methods to deal with the problem of high project cost