Construction method of premixing pouring soil cement pile used for strengthening ground and pile produced thereby
A cement-soil pile and foundation reinforcement technology, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of difficult control of pile quality, low cement-soil strength, and low pile body strength, and achieve the goal of penetrating the ground The effect of strong ability, environmental protection and investment saving
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Embodiment 1
[0036] The soda factory project in Lingang Industrial Zone, Tianjin, the stratum is brown, loose, clayey soil with a small amount of impurities on the surface, and the thickness is 2.2 meters; the bottom layer is silty clay: taupe; soft to flow plastic, and the soil quality is not good. Uniform, with a thin layer of silty clay, 3.3 meters thick; silty clay, 4.5 meters thick, gray, flow-plastic, uneven soil quality, with a small amount of silt at the top, and partially silty clay; silty clay and clay 5 meters thick Taupe, flowing plastic, uneven soil quality; clay, 4.2 meters thick, gray, soft plastic, uneven soil quality. The slag cement pure cement slurry with a cement content of 20% in the conventional mixing pile is used. The pile length is 15m. After 28 days after the pile is built, the average value of the unconfined compressive strength is only 0.85MPa. And adopt the construction method of ready-mixed perfusion cement-soil pile of the present invention, each component ma...
Embodiment 2
[0037] Example 2: The new Guangzhou-Zhuhai railway project, the landform is a marine accumulation plain, the surface layer is artificially filled with grayish yellow, moist, loose, mainly composed of clay and sandy soil, containing a small amount of plant rhizomes, distributed in the pond ridge, Thick 2.0-3.0m. The following is silt: gray-black, saturated, rhizomorphic, mainly composed of clay, partially containing a small amount of shell fragments and humus, with strong viscosity and extremely poor mechanical properties. It is distributed under the pond ridge, with a thickness of 8.55-10.0m. The foundation is reinforced with ready-mixed cement-soil piles. The mass ratio of each component is: 100 soil, 50 water, 20 cement, and 15 sand. The average value of the unconfined compressive strength was tested by core pulling 28 days after the pile was formed. is 5.5MPa.
[0038] To sum up, conventional cement-soil mixing piles use a deep-bed mixer to inject pure cement slurry into t...
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