Construction method for enhancing strength of cement mixing pile through combination of fiber reinforcement and electroosmosis method

A technology of cement mixing pile and fiber reinforcement, which is applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problem of delaying the construction progress of the superstructure, resistance to horizontal load of foundation pile, low impact load capacity of uplift load, low impact load capacity of cement and soil, etc. The problem of long hardening time, etc., can achieve the effect of increasing the current size and soil conductivity, enhancing the unconfined compressive strength, and optimizing the electroosmotic effect.

Pending Publication Date: 2022-05-06
CHINA CONSTR FIFTH ENG DIV CORP LTD +1
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Problems solved by technology

However, there are still some deficiencies in the traditional cement-soil mixing piles: since the pile body is not equipped with steel bars, the foundation piles have low resistance to horizontal loads, uplift loads, and impact loads; The design value of the pile strength generally takes at least 90 days, and the longer consolidation age delays the construction progress of the superstructure

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  • Construction method for enhancing strength of cement mixing pile through combination of fiber reinforcement and electroosmosis method

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Embodiment 1

[0026] A construction method for strengthening the strength of cement mixing piles with fiber reinforcement combined with electroosmosis method. In order to improve the strength of cement soil and accelerate the hardening speed of cement soil, polypropylene fibers are mixed into the mixture and steel bars are inserted during construction with the help of electroosmosis method. Accelerate pile precipitation.

[0027] The construction method of fiber reinforcement combined with electroosmotic method to enhance the strength of cement mixing pile in this embodiment includes the following construction steps:

[0028] a. Before construction, the construction site of the mixing pile should be leveled in advance, and all obstacles on the ground and underground at the pile position should be removed. When the site is low-lying, clay should be backfilled, and miscellaneous soil should not be backfilled;

[0029] b. Carry out measurement and setting out according to the pile position des...

Embodiment 2

[0038] This embodiment is basically the same as Embodiment 1, especially in that:

[0039] Such as figure 1 as shown, figure 1 It is a schematic diagram of the operation of strengthening the strength of cement mixing piles by combining fiber reinforcement and electroosmotic method in the present invention.

[0040] The embodiment of the present invention provides a construction method for strengthening the strength of cement mixing piles with fiber reinforcement combined with electroosmotic method, which includes: adding calcium chloride as an admixture to the ordinary Portland cement mixture, and mixing it with polypropylene fiber combine. After the pile position is drilled to the design depth, the drill bit of the powder spraying pile machine is stirred and lifted, and the reinforced mixture is fully stirred into the soil through the nozzle at the end of the drill pipe in the powder spraying system. Insert steel bars on both sides of the fiber-reinforced cement mixing pil...

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Abstract

The invention discloses a construction method for enhancing the strength of a cement mixing pile by combining fiber reinforcement with an electro-osmosis method, which comprises the following steps: on the basis of a traditional cement mixing pile, mixing polypropylene fibers into a common Portland cement mixture, inserting steel bars into the pile as a cathode and an anode, and arranging a water collecting header pipe on the cathode side as a drainage channel; and a calcium chloride solution is doped during mixing, so that the electroosmosis period is shortened, and the electroosmosis effect is optimized. The construction technology is simple, after reinforcement is conducted through the polypropylene fibers, the bending resistance, shearing resistance, pulling resistance and cracking resistance of a pile body are remarkably improved, compared with a common cement mixing pile, the strength is uniform after electroosmosis, the solidification age is effectively shortened, and high engineering economic applicability is achieved.

Description

technical field [0001] The invention relates to a foundation construction technology, in particular to a construction method for strengthening the strength of cement mixing piles by fiber reinforcement combined with electroosmotic method. Background technique [0002] In my country's coastal areas, silty soft clay layers are widely distributed, and the soil particles are mainly small-sized clay particles with high plasticity and high water content. As one of the most commonly used reinforcement measures for soft foundation treatment, the cement-soil mixing pile uses cement as a curing agent, and through a specific mixing machine, the soft soil and cement mixture are forcibly mixed and hardened deep in the foundation, so that the reinforced pile body and The natural foundations together form a composite foundation with high bearing capacity and low compressibility. However, there are still some deficiencies in the traditional cement-soil mixing piles: since the pile body is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46C04B28/04
CPCE02D5/46C04B28/04E02D2300/0018E02D2300/0057C04B2201/50C04B2111/343C04B16/0633C04B22/124
Inventor 昌郑陈利宏单宏伟唐灵敏刘飞禹
Owner CHINA CONSTR FIFTH ENG DIV CORP LTD
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