Soft soil foundation explosive point cavitation and dynamic compaction method and complete device thereof

A technology of soft soil foundation and bursting point, which is applied in the field of construction engineering, can solve the problems of easy to produce rubber soil, increase drainage channels such as plastic drainage boards, and poor effect, so as to improve the effect of tamping, improve the depth of tamping and construction efficiency effect

Active Publication Date: 2018-05-08
ZHEJIANG HONGYU ENG PROSPECTING DESIGN +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are a lot of silty soft soils in the southeast coastal areas, with high moisture content and weak soil quality. These lands must undergo foundation treatment before being used for engineering construction. The commonly used surcharge preloading or vacuum preloading drainage consolidation methods require a long construction period; increase Plastic drainage boards and other drainage channels are often silted up, making drainage difficult and the effect is not good
It is a common method to use dynamic compaction method for foundation treatment in saturated soft soil foundation, and it is also a construction technology with high efficiency. , due to the accumulation of pore water pressure in the soft soil foundation and the lack of drainage channels, it is easy to produce rubber soil, the effect of tamping is not good, and the treatment depth is limited
The commonly used improvement method is the dynamic compaction replacement method. Through the replacement of the pilot hole, first make gravel piles or other drainage channels, and then carry out dynamic compaction, which can improve the compaction effect to a certain extent, but the construction speed is significantly affected, and the reinforcement depth still limited

Method used

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  • Soft soil foundation explosive point cavitation and dynamic compaction method and complete device thereof
  • Soft soil foundation explosive point cavitation and dynamic compaction method and complete device thereof
  • Soft soil foundation explosive point cavitation and dynamic compaction method and complete device thereof

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Effect test

Embodiment 1

[0028] Embodiment 1, a kind of explosive cavitation dynamic compaction method of soft soil foundation

[0029] A kind of method for explosive cavitation dynamic compaction of soft ground, comprising the following steps,

[0030] A. Use small drilling rigs to drill blast holes in soft soil foundation. The drilling depth of the blast holes exceeds 1 meter according to the design to strengthen the stratum. Put multiple emulsion explosives, keep the distance between each emulsion explosive in the blast hole at 3 meters, and seal it with cement at a distance of 3 meters from the hole of the blast hole.

[0031] B. Install the protective tube 1, select the integral round steel protective tube (such as figure 1 shown), hoist the protective tube 1 to the position of the blast hole, make the center of the protective tube 1 align with the blast hole, and make it sink into the soil layer under the action of its own weight, and set four sliding grooves on the outer side of the protective...

Embodiment 2

[0036] Embodiment 2, a blasting dynamic tamping linkage device,

[0037] like Figure 1~3 As shown, a blasting dynamic tamping linkage device includes a crane 4, a decoupling device 7, a decoupling control device, a special-shaped weight 6 with a blunt head 8, a differential control detonator, and a controller, a controller, a differential control The detonators are all arranged in the console 5, and the controller controls the linkage between the decoupling control device and the differential control detonators. The controller automatically sets the delayed detonation time according to the lifting height of the special-shaped heavy hammer 6 through the program. The delayed detonation time is the free fall time from the special-shaped heavy hammer 6 from the lifting height to 1 meter above the ground. The special-shaped weight 6 with a blunt head 8 is connected to the hook of the crane 4 through a decoupling device 7, the decoupling device 7 is controlled by the decoupling co...

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Abstract

The invention discloses a soft soil foundation explosive point cavitation and dynamic compaction method. A continuous cavity is generated in saturated soft soil in drilling and blasting modes, a softsoil layer is compacted with high energy through a special special-shaped heavy hammer with a blunt end in blasting differential equation, bubbles are generated at the front end of the blunt end through soil liquefaction generated by blasting, the cavitation function is formed in the saturated soil under the dual actions of blasting impact and impact of the blunt end, and the energy of the heavy hammer can deeply penetrate into the stratum. The cavity formed by impaction is filled with metalling in time to form a dynamic compaction replacement layer, then secondary re-compaction is conducted through an ordinary hammer, and accordingly the compaction effect and depth are greatly improved, and the construction efficiency is improved. Meanwhile, the invention discloses a blasting and dynamiccompaction linkage device which can be better suitable for the method to conduct blasting and dynamic compaction on a soft soil foundation.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a soft soil foundation explosion point cavitation dynamic compaction method and a complete set of device thereof. Background technique [0002] There are a lot of silty soft soils in the southeast coastal areas, with high moisture content and weak soil quality. These lands must undergo foundation treatment before being used for engineering construction. The commonly used surcharge preloading or vacuum preloading drainage consolidation methods require a long construction period; increase When plastic drainage boards and other drainage channels are used, they are often silted up, causing drainage difficulties and poor results. It is a common method to use dynamic compaction method for foundation treatment in saturated soft soil foundation, and it is also a construction technology with high efficiency. , due to the accumulation of pore water pressure in the soft so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/054
CPCE02D3/046F42D1/00F42D1/045F42D3/00
Inventor 李强田微微潘明一罗在国张委金诚
Owner ZHEJIANG HONGYU ENG PROSPECTING DESIGN
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