Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method

A foundation treatment and foundation technology, which is applied in basic structure engineering, soil protection, construction, etc., can solve the problems of effect and treatment time constraints, and the construction period and cost cannot meet the actual application of the project, so as to shorten the construction period and accelerate soil solidification. knot effect

Active Publication Date: 2011-10-19
CHINA ZHONGHUA GEOTECHN ENG
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Problems solved by technology

However, as the silt content increases, especially when the silt content exceeds 30%, the treatment effect and treatment time of this method are

Method used

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  • Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method
  • Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method
  • Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method

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Embodiment Construction

[0016] , booster system layout

[0017] Booster system settings. The number of booster pipes, the insertion depth of the booster pipes, the location of the booster and the booster frequency are designed between the longitudinal drainage plates according to the stratum conditions. The booster pipe is made of steel pipe or PVC pipe, the side wall is arranged in a triangle with Φ5mm round holes, and the pipe wall is covered with a rubber sealing film in sections. The pressurized tube is inserted through the intubation machine. The bottom end of the booster tube is closed, and the upper part is connected to the conduit. The conduit adopts a Φ10mm steel wire hose. After the conduit is assembled, it is directly connected to the air compressor through the membrane outlet device. When working, the high-pressure gas is transmitted into the booster pipe through the conduit, and the soft soil is pressurized laterally through the expansion of the rubber membrane outside the booster tube...

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Abstract

The invention provides an overpressure vacuum dewatering combined dynamic consolidation foundation treatment method, which comprises the following steps that: a pressurizing system is arranged, namely a certain number of micropore pressurizing tubes with a certain depth are arranged among longitudinal drainage well points, rubber sealing films are sleeved outside the pressurizing tubes, and high-pressure air is transmitted to the pressurizing tubes directly by an air compressor through a guide pipe; a vacuum dewatering system is arranged, namely a set of dewatering and drainage system provided with a vacuum pump for improving efficiency is arranged in a light-weight well point and tube well dewatering system additionally, wherein the air displacement of the vacuum pump is more than or equal to 100L/s, and the vacuum degree of the system is between 65 and 90kPa; and in a dynamic consolidation system, dynamic consolidation is performed by selecting pounders with different energy according to the dewatering conditions of strata, the moisture content of soil and permeability. Soft soil is pressurized laterally by the pressurizing system while the vacuum dewatering is performed, so that water molecules in soil bodies flow directionally to accelerate the consolidation of the soil bodies. By the method, the pressurization effect of vacuum combined loading of between 80 and 120kPa can be achieved, dewatering can be accelerated, the consolidation effect can be improved, and the construction process is quick, high-efficiency, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a treatment method for overpressure vacuum dewatering combined with dynamic tamping foundation, which is mainly suitable for silt, silty clay and sandy soil foundations with high groundwater level, and more suitable for mixed soil foundations mixed with muddy soil in sand , belonging to the field of geotechnical engineering. Background technique [0002] As my country joined in December 2001 WTO With the rapid growth of foreign economy, my country's coastal ports have ushered in a new period of development, and large-scale land reclamation projects and coastal zone development projects are booming. The coasts of Liaoning, Hebei, Shandong, Jiangsu, Fujian, and Guangdong are all reclaiming land from the sea on a large scale. Most of these areas are silty soil and silty soft soil with high water content and high compressibility. The large-area land reclamation in the rear is carried out by dredging and dredging and filling of s...

Claims

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Application Information

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IPC IPC(8): E02D3/046E02D3/10
Inventor 谭再坤潘秉忠杨耀明景本玉
Owner CHINA ZHONGHUA GEOTECHN ENG
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