Punching water supplement-based method for treating foundation by adopting dynamic compaction

Abstract

The invention discloses a punching water supplement-based method for treating a foundation by adopting dynamic compaction, which comprises the following steps: firstly, performing measurement positioning, and marking out a dynamic compaction central point; subsequently, fixing a support on the ground; then, selecting a punching conical head with a corresponding diameter and installing at the lower end of a punching dowel bar according to the punching aperture required by water supplement amount; enabling a stress application bar to penetrate into a stress application pore at the lower part of the upper end of the punching dowel bar; hanging a sling at both ends of the stress application bar; and inserting the punching dowel bar into a guide pipe on the support by utilizing the suspension arm of a truck crane to enable the punching conical head to be positioned on the dynamic compaction central point; implementing multiple impacts on the upper end of the punching dowel bar by utilizing an impact hammer connected with the suspension arm of the truck crane until the punching conical head is drilled into the ground and reaches the preset depth; subsequently, pulling the punching dowel bar and the punching conical head out of the ground through the sling by utilizing the suspension arm of the truck crane; and forming a finished pore below the dynamic compaction central point; removing the support and the guide pipe; irrigating water into the finished pore until the finished pore is full of water to cover the orifice; and finally, after the water permeates, filling soil into the pore to the ground, and performing dynamic compaction operation.

Description

technical field [0001] The invention relates to a method for treating foundation with dynamic tamping, in particular to a method for treating foundation with dynamic tamping for replenishing water in pre-punched holes to adjust the water content of formation. technical background [0002] With the development of highways and high-speed railways in the central and western regions, a large number of roadbeds need to be treated. Due to the small rainfall and dry climate in the central and western regions, the probability of soil softening when encountering water is much lower than that in the rainy areas in the south. Generally, the foundation must be compacted Treatment can achieve the purpose of controlling post-construction settlement. [0003] Dynamic compaction is one of the traditional methods for dealing with foundations in the central and western regions. It uses the kinetic energy of the free-falling movement of the rammer to convert the compaction force formed by the ...

AI Technical Summary

Problems solved by technology

However, the project is located in an extremely arid area in the west, and it is very difficult to use water for construction. It is necessary to transport the construction water from Hami, Xinjiang to the construction site by train, and the cost is more than 35 yuan / m3. Break out the water storage pit in advance, and pour water into the water storage pit to infiltrate. Due to the excessive evaporation loss of the water storage pit while waiting for the water to infiltrate, and the extremely uneven distribution of water in the stratum, it leads to serious waste of water resources.

In addition, water needs to use machinery to break the water storage pit. Due to repeated movement of equipment, the construction cost remains high

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