Precipitation prepressing association motivation induration deep densification method

A combined power and dynamic consolidation technology, which is applied in basic structure engineering, soil protection, construction, etc., can solve the problems of insignificant reinforcement effect, high cost, and long time consumption of deep soil, and achieve obvious effect of foundation reinforcement. Effects of cost reduction and shortened construction period

Active Publication Date: 2008-08-27
CCCC FOURTH HARBOR ENG CO LTD +3
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AI Technical Summary

Problems solved by technology

Although these methods are more effective, they are costly and time-consuming, and the effect of deep soil reinforcement is not significant

Method used

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  • Precipitation prepressing association motivation induration deep densification method
  • Precipitation prepressing association motivation induration deep densification method
  • Precipitation prepressing association motivation induration deep densification method

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Embodiment Construction

[0016] This method is suitable for applications where the permeability coefficient is not less than 10 -6 cm / s, the soft soil foundation whose soil moisture content is not higher than 20% of its optimal moisture content before dynamic consolidation.

[0017] Such as Figure 1 ~ Figure 3 As shown, it is the construction process and cross-sectional schematic diagram of the precipitation preloading combined with dynamic consolidation deep reinforcement method:

[0018] ①Clear and level the surface of the soft soil foundation.

[0019] ② Insert vertical drainage body 11, such as plastic drainage board, sand well or bagged sand well, etc., the depth is determined by the thickness of soft soil and the treatment depth.

[0020] Before laying the vertical drainage body 11, a horizontal drainage sand cushion 12 with a thickness of 0.5-1.0 m may also be laid first depending on site conditions.

[0021] ③ Arrange well point pipes 13 at the inner boundary of the reinforcement area 20 f...

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Abstract

The invention discloses a deep strengthening method of dewatering reinforcement combined dynamic consolidation, which comprises the following steps: V1ing: a vertical drainage body is arranged in a strengthened foundation. V2ing, soft soil foundation is done with the dewatering reinforcement. V3ing, after a deep soil body below 8 meter of the ground surface of the strengthened foundation is acted by the dewatering reinforcement, the consolidation degree is above to 75 percent, and then the consolidation construction is done. The invention combines a dewatering reinforcement method and a dynamic consolidation method to be applied to strengthen the deep soil body of the soft soil foundation, particularly the permeability coefficient is not less than 10-6cm/s, and the water content of the soil body before the dynamic consolidation is not higher than a strengthened soft soil foundation which is 20 percent of the best water content. The foundation reinforcement effect is obvious, the construction period is capable of being reduced 1/3-2/3 as a whole, the construction cost is greatly reduced, the cost is saved (compared with a vacuum preloading method, the treatment cost in each square meter is reduced by 30-50 percent ), because the operating intensity is small, the demand for equipment is not high, and the deep strengthening method is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of foundation treatment of fixed buildings such as construction engineering, port engineering, and highway engineering. Background technique [0002] With the development of economic construction, the demand for ports in coastal cities has been significantly strengthened. In recent years, the construction of Tianjin Port, Lianyungang Port and Guangzhou Nansha Port has developed rapidly, and land reclamation projects have gradually increased. Most of the land in the port area is silted in the original waters. It is formed by dredging silt and medium-fine sand on the foundation of tidal flats. Some of the newly filled upper soft soils have a water content as high as 80% or more, and their strength and bearing capacity are extremely low. Deep soft clay soils are also widely distributed below the dredged fills. The soil layer has the characteristics of high water content, high compressibility, low strength and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10E02D3/046
Inventor 董志良张功新邱青长林军华李燕罗彦
Owner CCCC FOURTH HARBOR ENG CO LTD
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