Foundation drainage control method

Abstract

The invention relates to a foundation drainage control method. The method comprises the following steps of: arranging a circle of vertical impervious curtains around a building foundation, arranging a vertical drainage body inside a foundation in the vertical impervious curtain, sequentially arranging a drainage sand mat, a horizontal impervious layer and a protective layer on the vertical drainage body, and hermetically connecting the vertical impervious curtain and the horizontal impervious layer. During the period of construction, the drainage solidifying of foundation soils is forcibly quickened through vacuum combined surcharge preloading so as to improve the strength of the foundation soils and ensure that the consolidation settlement of the foundation is completed as much as possible in the construction period. Before the beginning of the engineer operation period, the preloading process is stopped and a drainage pipeline is tightly sealed in order to block the further generation of the consolidation settlement of the foundation soils, thereby achieving the purpose of favorably controlling the post-construction settlement of the foundation. The provided foundation drainage control method of the invention is suitable for the soft soil foundation with low strength and big compressibility and has the characteristics of low construction cost, short construction period and favorable control effect of the post-construction settlement.

Description

technical field [0001] The invention belongs to the technical field of civil construction foundation treatment, and in particular relates to a weak foundation reinforcement treatment method. Background technique [0002] The patent No. 03130321.8, which was proposed by the applicant of the present invention and authorized by the State Intellectual Property Office, is called "Foundation Delayed Consolidation Treatment Method" and the patent number is 200710057149.3, and the two invention patents named "Foundation Hole Pressure Adjustment Treatment Method" are both It belongs to the large-area foundation treatment technology whose main goal is to control post-construction settlement. [0003] Among them, the main method of the ground delay consolidation treatment method is to set a circle around the building foundation or set up two vertical anti-seepage curtains along the line direction at the slope toe position on both sides of the roadbed, and lay a curtain on the bottom su...

AI Technical Summary

Problems solved by technology

[0006] 1. Since the horizontal anti-seepage layer and the vertical anti-seepage curtain limit the drainage and consolidation of the foundation soil, while controlling the post-construction settlement, it also brings the disadvantage that the strength of the foundation soil cannot be improved, making these two methods only It is suitable for soft soil foundations where the foundation bearing capacity and stability meet the requirements, but only needs to control the post-construction settlement of the foundation, and cannot be applied to soft soil foundations with very low bearing capacity, so the scope of engineering application is limited

[0007] 2. Since no solidifying agent such as cement, sand and gravel materials or prefabricated piles are used to reinforce the foundation as a whole, only the horizontal anti-seepage layer and vertical anti-seepage curtain are used to limit the drainage and consolidation of the foundation soil, and the foundation is under a specific load. The total consolidation settlement has not been reduced, but the process has been delayed. In order to limit the post-construction settlement within the scope of engineering requirements, it is necessary to set up a deep vertical anti-seepage curtain, and the horizontal anti-seepage layer and The technical requirements for the vertical anti-seepage curtain are also relatively high, which makes the technical implementation more difficult and the project cost is still relatively high

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