Method and device for pre-consolidating mixed hydraulically-filled soft soil foundation
A technology of soft soil foundation and treatment method, which is applied in the comprehensive utilization of dredging dredging and filling soil, pre-reinforcement treatment of mixed dredging-fill soft soil foundation, and ultra-soft foundation pre-reinforcement treatment technology, which can solve the problem of low bearing capacity and consolidation Large settlement and other problems, to achieve the effect of clear mechanism, simple process, significant social economic and environmental benefits
Inactive Publication Date: 2011-02-09
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI +1
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[0006] The purpose of the present invention is to provide a pre-reinforcement treatment method and device for mixed dredging and filling soft soil foundation in order to overcome the shortcomings and deficiencies such as extremely low initial bearing capacity and excessive consolidation settlement of ultra-soft dredging and filling foundation
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[0052] Below in conjunction with accompanying drawing, the present invention is further described:
[0053] 1. Pre-reinforcement treatment of mixed dredging soft soil foundation
[0054] 1. Step ①, determine the curing agent combination and its ratio with the filling material
[0055] According to the characteristics of dredger fill soft soil, carry out indoor comparative tests on the sludge solidification effect of quicklime, cement, gypsum, fly ash, and slag, and screen and combine the curing agent materials and their ratios suitable for dredger fill sludge with the best early strength solidification effect .
[0056] 2. In step ⑤, determine the filling rate according to the test results
[0057]Use stirring equipment to form curing agent slurry on site, and set up double-pipe mixing blowing and filling material equipment 4 at the blowing and filling spray port, adjust the blowing and filling rate of curing agent slurry according to the mud blowing and filling rate and mix...
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The invention discloses a method for pre-consolidating mixed hydraulically-filled soft soil foundation and a device thereof, relating to the field of pre-consolidation treatment technology of soft soil foundation. The method arranges a horizontal drainage passage in the mixed hydraulically-filled process, adopts a vacuum preloading and electroosmosis combined method for construction, carries out early intervention and consolidation of the ultra-soft soil actively during the hydraulically-filled process and the initial stage of the hydraulically-filled process, and creates a prophase conditionfor the subsequent foundation consolidation. The device arranges reinforcement cage sand bad collecting wells at the construction site and arranges a horizontally-communicated drainage sand bag between the reinforcement cage sand bag collecting wells; and a dual-pipe mixed hydraulically-filled equipment, the reinforcement cage sand bag collecting wells, a treatment equipment by the vacuum preloading and electroosmosis combined method and a collecting well pumping equipment are sequentially connected from left to right. The method and the device can cause the saturated soft soil to generate early consolidation and pre-settlement, leads the pre-treated foundation soil to meet the load metamorphism requirement better in the engineering usage stage and can greatly save engineering period and subsequent engineering treatment expense.
Description
technical field [0001] The invention relates to the technical field of pre-reinforcement treatment of soft soil foundations, in particular to a method and device for pre-reinforcement treatment of mixed dredging soft soil foundations. Specifically, the present invention relates to the ultra-soft foundation pre-reinforcement treatment technology for dredging and reclamation of rivers, waterways, lakes, etc. Comprehensive utilization of soil. Background technique [0002] Dredging fill is a sedimentary soil formed by hydraulic dredging of mud and sand in the process of dredging and dredging river channels and land reclamation. Using the dredged mud and sand to fill the sea has become an effective way for coastal cities to alleviate the shortage of land resources. way. For dredging sand, silt, fly ash and other foundations, the reinforcement methods often used in the project include: fly ash pile, deep mixing pile, vacuum preloading method, surcharge preloading method, pre-in...
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IPC IPC(8): E02D3/00E02D3/10E02D3/11E02D3/12
Inventor 孟庆山傅志斌胡明鉴汪稔杨超陈能远
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI