Anti-liquefaction method of cement mixing pile composite foundation based on site excess pore water pressure ratio

A technology of super pore water pressure ratio and cement mixing pile, which is applied in the direction of sheet pile wall, soil protection, foundation structure engineering, etc., can solve the problems of no design method and difficulty, achieve clear steps, clear concept, and ensure reliability and the effect of rationality

Active Publication Date: 2017-06-30
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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Problems solved by technology

[0019] Aiming at the problem of anti-liquefaction of cement mixing pile composite foundation, although the corresponding basis can be found in theory and practical engineering, there is no complete and mature design method; this brings greater difficulty to the scheme design

Method used

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  • Anti-liquefaction method of cement mixing pile composite foundation based on site excess pore water pressure ratio
  • Anti-liquefaction method of cement mixing pile composite foundation based on site excess pore water pressure ratio
  • Anti-liquefaction method of cement mixing pile composite foundation based on site excess pore water pressure ratio

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings.

[0053] Such as image 3 As shown, a cement mixing pile composite foundation anti-liquefaction method based on site excess pore water pressure ratio includes the following steps:

[0054] Step 1: Select the measured geological data of different projects and different liquefaction discrimination exploration holes, use FLAC3D software, use the Finn constitutive relation to establish the corresponding natural site numerical model, and calculate the excess pore water pressure of the liquefied soil layer at each exploration hole under earthquake action than gamma u ;

[0055] Step 2: According to the calculated excess pore water pressure ratio at different depths of the liquefied soil layer and the distribution of the liquefied soil layer at the exploration hole, calculate the corresponding "site excess pore water pressure ratio" at each exploration hole in the natural sit...

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Abstract

The invention discloses a cement-mixed pile composite foundation anti-liquefaction method based on a site excess pore water pressure ratio. According to the concept of the site excess pore water pressure ratio, fast Lagrangian analysis of continua in three dimensions (FLAC3D) software is used for numerically simulating a practical engineering site with a large number of exploratory holes, and thus the site excess pore water pressure ratios of the exploratory holes are worked out; correlation analysis is conducted on liquefaction indexes and the site excess pore water pressure ratios of the exploratory holes, so that a liquefaction index-site excess pore water pressure ratio relational expression is obtained; the FLAC3D software is used for numerically analyzing a cement-mixed pile composite foundation, and the site excess pore water pressure ratio of soil between piles of the composite foundation is worked out; the liquefaction index-site excess pore water pressure ratio relational expression is used for working out an equivalent liquefaction index of the soil between the piles of the composite foundation; and according to the liquefaction index, the anti-liquefaction capacity of the composite foundation is quantitatively judged, and a composite foundation design scheme is reasonably evaluated.

Description

technical field [0001] The invention relates to a method for preventing liquefaction of a cement mixing pile composite foundation based on site excess pore water pressure ratio, and belongs to the technical field of civil engineering. Background technique [0002] Typical geological section of Jiangsu Huadian Jurong Power Plant project area, such as figure 1 As shown, the ⑧ soil layer is abbreviated below, and the distribution characteristics and engineering properties of each soil layer are as follows: [0003] Layer ② silty clay: the layer thickness is relatively thin and distributed, and it is a soil layer with high compressibility and low bearing capacity; [0004] Layer ③ muddy silty clay: the layer thickness is relatively large, the layers are relatively stable, and they are all distributed. It is a soil layer with high compressibility, low bearing capacity and high water content; [0005] Layer ④ silty soil sandwiched with silty clay: all distributed, thinner and pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12E02D5/46
CPCE02D3/12E02D5/46
Inventor 卢红前束加庆孙一帆刘爽项雯朱寿建顾晓庆张戈吴兆和孙良辰
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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