Processing method and device for reinforcing soft foundation by hydraulic vibration combined with vacuum water suction
A technology of vacuum water absorption and hydraulic vibration, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of long cycle, limited effect of dynamic compaction method and vibratory settlement method, high reinforcement cost, etc.
Inactive Publication Date: 2014-07-02
TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
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Problems solved by technology
For foundations of muddy silty clay and saturated cohesive soils such as silt and clay with a thin soil layer, low requirements for foundation bearing capacity, and undrained shear strength of the soil body less than 20kPa, the effects of dynamic compaction and vibratory settlement methods are limited. The advantages of rapidity and economy are difficult to bring into play, while the drainage consolidation method has a long period and high reinforcement costs
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[0028] A treatment method of hydraulic vibration combined with vacuum water absorption to strengthen weak foundations. A hydraulic vibration hammer is adopted. The vibration plate and vibrating rod at the lower part of the vibration hammer transmit the excitation force of the vibration hammer on the surface of the soft foundation soil and deep soil to increase the soil. The additional stress, through the vacuum suction system composed of the vacuum system, the vibrating rod and the drainage system arranged inside the vibrating plate, accelerates the drainage of soil pore water and achieves a rapid increase in the bearing capacity of the soil. The void formed by the vibrating rod after hydraulic vibration combined with vacuum water absorption to strengthen the soil can be backfilled with sand as needed to play a drainage channel and a certain displacement role.
[0029] Technical parameters of weak foundation:
[0030] The soil layer is not thick, 5m~10m;
[0031] The requirement of ...
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The invention provides a processing method and device for reinforcing a soft foundation by hydraulic vibration combined with vacuum water suction. A hydraulic vibration hammer is used, a vibration plate on the lower portion of the vibration hammer and a vibration rod connected to the position below the vibration plate are used for transmitting the excitation force of the vibration hammer on the soil surface and deep layer soil of the soft foundation, and the additional stress of soil is increased. A vacuum pumping system, the vibration rod and a drainage system arranged in the vibration plate constitute a vacuum water sucking system, drainage of pore water of soil is accelerated, and the purpose of quickly improving soil bearing capacity is achieved. After the soil is reinforced by hydraulic vibration combined with vacuum water suction, the gap formed by the vibration rod can be filled with sandy soil according to needs, and the effect of a drainage channel and a certain replacing effect are achieved. The vacuum water sucking system is used, drainage of pore water in the soil is accelerated in the vibration process, and a solidification effect is achieved. According to the processing method, a dynamic consolidation method, a vibration sinking method and a drainage consolidation method are combined to form a novel soft foundation reinforcing method.
Description
Technical field: [0001] The invention belongs to the design and construction technology for the strengthening treatment of soft foundations in civil engineering, and particularly relates to a treatment method and device for treating soft foundations with less clay content by enclosing the sea and reclaiming land by hydraulic vibration combined with vacuum water absorption. Background technique [0002] The method of using vibration and water wash to reinforce soil is called vibratory water wash method, abbreviated as vibratory wash method. Vibration method is divided into vibratory compaction method and vibratory displacement method. The former is suitable for filling of sand and various bulk materials, and the latter is suitable for sand, silt, silty clay, plain fill and miscellaneous fill. For soil, the applicability of saturated cohesive soil with undrained shear strength less than 20kPa should be determined through tests. [0003] The dynamic compaction method is to freely dro...
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IPC IPC(8): E02D3/10E02D3/054
Inventor 叶国良侯晋芳李一勇李树奇梁萌刘爱民喻志发曹永华付建宝
Owner TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG