Water drainage and dynamic compaction all-in-one device and use method thereof

Abstract

The invention discloses a water drainage and dynamic compaction all-in-one device and a use method thereof. The device comprises a rammer, a silencing sleeve, a compaction bearing platform, a metal filter pipe and a water drainage hose, wherein an orbital groove is formed in the top of the compaction bearing platform; the silencing sleeve is mounted in the orbital groove; the rammer is arranged in the silencing sleeve; the lower bottom surface of the compaction bearing platform is connected with the metal filter pipe through a connection opening; the metal filter pipe is a double-layer rigid sleeve; and the double-layer rigid sleeve comprises an inner-layer filter pipe and an outer-layer filter pipe which are arranged inside and outside in a sleeving manner. By the adoption of the compaction bearing platform mode, under a condition of the same compaction energy, the stress on a soil body is more uniform, and the actuating range is wider; the rigid compaction bearing platform serving as a contact surface of the rammer avoids direct contact between the rammer and the soil body in the conventional dynamic compaction process, so that the difficulty that the rammer is hard to pull up after falling to the ground is solved; and due to the synchronous operation of dynamic compaction and water drainage below the center of a compaction point, dissipation of excess pore water pressure in the soil body can be accelerated, and the progress of the engineering is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of soft soil foundation treatment, and in particular relates to an integrated device for precipitation and dynamic compaction and a use method thereof. Background technique [0002] In the field of soft soil foundation treatment technology, dynamic compaction technology has been widely used in foundation reinforcement projects such as highways, railways, airports, and port reclamation. During the construction process, the rammer is hoisted high, and then the rammer is released to rapidly increase the bearing capacity and compression modulus of the foundation. However, in the actual application of dynamic compaction, there are the following shortcomings to be solved: First, because the construction soil is relatively soft, when the tamper hammer is smashed into the soft clay, it will sink into the soil, and the air in the surrounding soil will be squeezed out After that, it will form a vacuum adsorption on t...

AI Technical Summary

Problems solved by technology

However, in the actual application of dynamic compaction, there are the following shortcomings to be solved: First, because the construction soil is relatively soft, when the tamper hammer is smashed into the soft clay, it will sink into the soil, and the air in the surrounding soil will be squeezed out After that, it will form a vacuum adsorption on the rammer, making it difficult to pull out the rammer; second, the force-bearing area of ​​the rammer is relatively small, and it will generate a large pressure when it contacts with the soil, which will make the stress and force of the soil The settlement distribution is uneven. Although there is a bulldozing process in the later stage, the effect is not obvious; third, the rammer falling from a high altitude will have a greater impact on the soil, and the soil will quickly generate high excess pore water pressure. At the same time, the water level will also rapidly increase. These will hinder the next tamping; usually it takes 3-5 days for the excess pore water pressure to dissipate after a strong tamping, which greatly slows down the construction progress and is not conducive to the rapid reinforcement of the soil; Ramming is a dynamic consolidation method, which will generate huge noise during operation, so the application place and time of dynamic compaction are greatly limited

These shortcomings seriously limit the further development of the dynamic compaction process, but have not been resolved for a long time

Images