Lime pile for processing island-shaped frozen soil foundation and construction method of lime piles
A technology for permafrost foundations and construction methods, which can be applied in basic structure engineering, soil protection, roads, etc., and can solve problems such as proportions and construction methods that cannot be applied to permafrost, achieve easy operation of construction technology, and improve foundation bearing capacity , The effect of simple construction technology
Active Publication Date: 2017-11-07
NORTHWEST RES INST CO LTD OF C R E C
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Problems solved by technology
However, the existing lime pile technology has not been used in permafrost foundation treatment, and its proportion and construction method cannot be applied to the treatment of island permafrost
Method used
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[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] like figure 1 As shown, the lime pile of the present invention comprises lime pile body 2, and the lime pile body 2 is fixed with coarse granular material pile body 1; The diameter is 300-500mm, and the length of the lime pile body 2 is the distance between the lower limit of the frozen soil and the upper limit of the frozen soil. The length of the coarse-grained pile body 1 is the distance from the upper limit of the frozen soil to the surface. Frost heaving occurs in the foundation soil.
[0031] Different from other foundation soils that need to be treated, lime piles to treat permafrost foundation not only need to consider thawing permafrost below the upper limit of permafrost and reinforce it, but also consider preventing frost heaving of the part of the soil above the upper limit of permafrost. Therefore, a combination of the l...
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Abstract
The invention discloses a lime pile for processing an island-shaped frozen soil foundation and a construction method of lime piles. The lime pile comprises a lime pile body and a coarse aggregate pile body which are fixedly connected, and the length of the lime pile body is the distance between the upper limit and the lower limit of frozen soil. The construction method includes the steps that in combination with exploration data and indoor experiments, some parameters of a project and the mass percent of quick lime are determined, experimental piles are built, a ramming experiment is conducted, and related construction technological parameters of the lime piles with the largest compaction are determined; the lime piles are built according to the parameters; multiple rows of lime piles are built on the island-shaped frozen soil foundation, wherein the distances between the adjacent lime piles are equal; after building, ground temperature monitoring points and deformation monitoring points are set, ground temperature and deformation detection is conducted, it is determined that composite foundation bearing capacity detection is conducted after frozen soil is thawed and deformation is stable, and following project construction is conducted after standards are met. According to the lime pile, the island-shaped frozen soil is completely thawed through the pre-thawing technology, and building deformation occurring when the frozen soil is thawed after project construction is prevented.
Description
technical field [0001] The invention belongs to the technical field of permafrost area engineering, and relates to a pile suitable for ground treatment in island-shaped permafrost areas, in particular to a lime pile for processing island-shaped permafrost foundations; Construction method. Background technique [0002] The island-shaped permafrost distributed in my country has the characteristics of high annual average ground temperature, small thickness, poor thermal stability and poor continuity. The cyclical changes in temperature cause the island-shaped frozen soil to freeze in the cold season and thaw and sink in the warm season. Under the alternating action of frost heave and thaw subsidence, differential settlement of the foundation occurs, which in turn causes the deformation and damage of buildings, railways and highways. Due to these characteristics of island frozen soil, the method of destroying frozen soil (pre-thawed soil) is suitable for its foundation treatme...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E01C3/06E02D27/35E02D3/08
CPCE01C3/06E02D3/08E02D27/35
Inventor 程佳熊治文韩龙武杨永鹏孟进宝金兰赵相卿杨晓明唐彩梅蔡汉成刘锟李奋
Owner NORTHWEST RES INST CO LTD OF C R E C