Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method
A construction method and technology of expansive soil, which are applied in excavation, filling, marine engineering and other directions, can solve problems such as unsafe engineering, and achieve the effects of preventing geological disasters, simple and convenient construction, and ensuring stability and safety.
Inactive Publication Date: 2009-02-11
SOUTHEAST UNIV
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Problems solved by technology
Therefore, this simple modification in water conservancy projects is very unsafe for the project, and there are hidden dangers
Method used
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Embodiment Construction
[0020] The establishment method of the present invention is as follows:
[0021] a. Prove and measure the expansion potential of the expansive soil in the area where it is located and the buried depth and thickness of the expansive soil;
[0022] b. Select the grouting pressure, and use easy-flowing cement slurry or cement fly ash slurry for split force grouting;
[0023] c. After the cement slurry or cement fly ash slurry pressed into the expansive soil is consolidated (usually about one month), excavation shall be carried out according to the designed slope;
[0024] d. Construction of seamless anti-seepage protective layer:
[0025] d1) Determining the particle gradation curve and expansion and contraction characteristics of the expansive soil in the original soil layer;
[0026] d2) In the expansive soil, 5-12% of the total weight of lime is added, and several types of fly ash and 1-2% of the total weight of the fly ash are respectively prepared. Sand, measure particle ...
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Abstract
The invention is a seamless anti-seeping stable expansion soil excavation dyke slope construction method, a seamless anti-seeping stable expansion soil excavation dyke slope design method used for expansion soil channel slopes and terraces in hydraulic and road engineering, especially a design directly applied to the filed of hydraulic engineering in expansion soil regions, and its construction method comprises: A. verifying and determining expansion potential and buried depth and thickness of expansion soil in a region; B. selecting slip casting pressure and adopting runny grout or cement coal ash grout for cleavage grouting at 0.3MPa-1.0Mpa; C. after the grout or cement coal ash grout in the expansion soil concretes, excavating according to the designed slope; and D. making seamless anti-seeping protective layer construction. And the modified expansion soil compact structure is stable and unable to season crack, and the compact layer has very small seepage coefficient, achieving the anti-seeping purpose and meeting the anti-seeping requirement, and having an efficacy of treating both principal and secondary aspects.
Description
technical field [0001] The present invention is a method for designing expansive soil canal slopes and embankments without cracks, anti-seepage, and stable expansive soil excavation embankment slopes in water conservancy and road engineering, especially a method that is directly applied to the design of slopes in the field of hydraulic engineering in expansive soil areas. This technology can protect and prevent accidents such as landslides and instability caused by seepage of rain and water on canal slopes in expansive soil areas. Background technique [0002] It has been found that there are a large amount of expansive soil distributed in more than 20 provinces and autonomous regions in my country. Expansive soil is a special kind of soil that absorbs water, expands, dehydrates and cracks, causing slope instability over and over again; embankment collapse affects the normal operation of roads and railways; embankment landslides Blocking the river course affects navigation an...
Claims
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IPC IPC(8): E02D17/00E02D17/18C04B22/06C04B18/08C04B14/12C04B14/06E02B3/16E02B3/12E02B13/00
CPCY02W30/91
Inventor 缪林昌
Owner SOUTHEAST UNIV