Microbial solidification method and irrigation and drainage device suitable for marine soft soil foundation
A soft soil foundation and curing method technology, applied in chemical instruments and methods, fertilization devices, applications, etc., can solve problems such as low bearing capacity and loss of drainage performance, reduce energy consumption, improve strength, and solve uneven curing. Effect
Inactive Publication Date: 2021-10-19
NORTH CHINA INST OF AEROSPACE ENG
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Problems solved by technology
[0004] The purpose of the present invention is to provide a microbial solidification method and irrigation and drainage device suitable for marine soft soil foundations, to solve the problem that traditional loose sand piles have good drainage performance, but their bearing capacity is low; while cement (or cement soil) injection The bearing capacity of the slurry sand pile is significantly improved after being cured by cement, but the drainage performance is basically lost
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[0035] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Such as Figures 1 to 5 As shown, a method for microbial solidification suitable for marine soft soil foundations is disclosed in this embodiment, and the method includes the following steps:
[0037] a. Pile hole excavation, such as figure 2 As shown, the first row of pile holes 1 and the second row of pile holes 1-1 are made on the marine soft soil foundation to be treated, and the prefabricated hollow pipe piles 3 are put into the first row of pile holes 1 and the second row of pile holes 1-1. 1, then put into the drainage device in the hollow pile 3 of the second row.
[0038] b. Grouting, such as image 3 As shown, the microbial liquid and nutrient solution required for the project are cultivated, and then...
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Abstract
The invention discloses a microbial solidification method and irrigation and drainage device suitable for marine soft soil foundations. The method mainly includes pile hole excavation, grouting, curing and drainage, and composite foundation forming; the irrigation and drainage device includes a mixing device and a drainage device. The mixing device communicates with the casing-type sealing joint through the grouting pipe, the grouting pipe is provided with a mud valve and a high-pressure pump, and the casing-type sealing joint is connected with the top opening of the hollow pipe pile. Compared with traditional sand piles, the present invention reduces energy consumption and reduces the environmental pollution of cement, lime and other cementitious materials; the solidified sandy soil body has certain cementation strength and permeability, and the composite foundation formed by processing At the same time, it solves the problems of low bearing capacity, poor drainage, and short service life. Compared with the existing microbial solidification technology, the mixing and pouring of sand, microbial liquid, and nutrient solution effectively solve the problem of MICP technology. Uneven solidification can effectively improve the strength of solidified soil.
Description
technical field [0001] The invention relates to the field of foundation treatment and construction, in particular to a microbial solidification method and irrigation and drainage device suitable for marine soft soil foundations. Background technique [0002] At present, sand piles are widely used in soft soil foundation treatment and reinforcement at home and abroad. Sand piles can act as reinforcements and drainage bodies. Sand piles are a kind of composite foundation of loose piles. The pile body formed by the use of loose material sand and the soil between the piles are jointly carried by the overlying cushion to form a conformable foundation. Sand piles are a common method for the treatment of weak marine soft soil foundations one. The sand pile is a sandy cylinder formed by sinking the steel casing into the foundation soil at a certain distance by means of impact or vibration to form holes, and then pouring sand into the pipe while pulling out the pipe and vibrating to...
Claims
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IPC IPC(8): E02D5/38E02D15/04E02D27/16E02D27/32E02D19/06C09K17/40C09K103/00
CPCC09K17/40C09K2103/00E02D5/38E02D15/04E02D19/06E02D27/16E02D27/32E02D2300/0026E02D2300/0045
Inventor 刘晓立聂宁刘广斌李俊明赵少锋孙艳春赵新春李志赵少庚毕学太李烨明杨志荣王磊史首智丁俊双田宇孙世良侯定贵
Owner NORTH CHINA INST OF AEROSPACE ENG