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Cement mixing pile with stiffness core capable of draining and pre-pressing firstly and then grouting as well as construction method thereof

A technology of cement mixing pile and construction method, which is applied in the direction of sheet pile wall, foundation structure engineering, soil protection, etc., to achieve the effect of low cost, enlarged depth and improved bearing capacity

Inactive Publication Date: 2012-08-29
ZHEJIANG UNIV CITY COLLEGE +2
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Problems solved by technology

Development of a Drainage Preloading and then Grouting Core Cement Mixing Pile and Construction Method

Method used

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  • Cement mixing pile with stiffness core capable of draining and pre-pressing firstly and then grouting as well as construction method thereof
  • Cement mixing pile with stiffness core capable of draining and pre-pressing firstly and then grouting as well as construction method thereof
  • Cement mixing pile with stiffness core capable of draining and pre-pressing firstly and then grouting as well as construction method thereof

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Embodiment Construction

[0039] figure 1 It is a schematic cross-sectional view of the cement mixing pile with grouting core after drainage and preloading in the present invention, refer to figure 1 As shown, a grouting cored cement mixing pile with drainage and preloading first, including cement mixing pile 3, vertical drainage grouting pipe 1 arranged in cement mixing pile 3 and vertical drainage grouting pipe 1 arranged at intervals On the top, more than one double-layer horizontal drainage grouting pipe 4, a loose material core pile 2 is arranged in the cement mixing pile 3, and a prefabricated pile tip 5 is arranged at the bottom of the vertical drainage grouting pipe 1.

[0040] The vertical drainage grouting pipe 1 is a seamless steel pipe with an outer diameter of 30mm and a wall thickness of 2mm, and the pipe body is uniformly provided with drainage grouting holes.

[0041] The cement mixing pile 3 is a wet two-way cement mixing pile with a diameter of 0.6m. The pile length is 15m. Stir t...

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Abstract

The invention relates to a cement mixing pile with a stiffness core capable of draining and pre-pressing firstly and then grouting as well as a construction method thereof. The cement mixing pile comprises a vertical draining and grouting pipe arranged in the cement mixing pile, and more than one dual-layer telescopic horizontal draining and grouting pipes arranged at intervals on the vertical draining and grouting pipe, wherein a bulk solid pile with the stiffness core is arranged in the cement mixing pile, and the length of a horizontal draining and grouting pipe in an outer layer is smaller than that of the horizontal draining and grouting pipe in an inner layer when the horizontal draining and grouting pipe is in a telescopic state. In a construction process, an upper drawn steel immersed tube is vibrated, and the horizontal draining and grouting pipe departs from the steel immersed tube and is stretched to form a horizontal draining body. According to the invention, the advantages of drainage consolidation and composite foundation methods are integrated, and foundations can be dynamically reinforced according to the construction period and the settlement requirements on the premise of lower construction cost while the bearing capacity and the processing depth of the cement mixing pile are increased.

Description

technical field [0001] The present invention relates to a cement mixing pile with drainage and preloading before grouting and a construction method thereof, in particular to a cement mixing pile with a cement core which is concentrically combined with a cement mixing pile and a slurry solidified core of bulk material after grouting Pile, adopting the principles of drainage consolidation method and composite foundation reinforcement method to treat soft foundation, can be used for medium and deep soft foundation treatment in highway, municipal, airport and dam projects. Background technique [0002] There are many types of soft soil foundations in my country, and they are widely distributed, especially in coastal areas and inland lacustrine sedimentary facies areas, there are many complex soft soil foundations of medium depth. Soft soil has the characteristics of high water content, high compressibility, low strength, poor water permeability, etc. When building buildings or f...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D3/10E02D15/04
Inventor 陈春来虞和定王新泉虞和登李强孟国潮傅翼伊本兴
Owner ZHEJIANG UNIV CITY COLLEGE
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