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什么是深层搅拌桩??

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sxdgs 发表于 2008-2-18 15:12:01 | 显示全部楼层 |阅读模式
搅拌桩 我找了很多资料 都没有介绍
只有 预制桩 和 灌注桩两大类
那搅拌桩是属于后者一类吧??
能详细点介绍一下搅拌桩的相关知识吗??

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ljmtidilgw 发表于 2008-2-18 18:45:12 | 显示全部楼层
深层搅拌桩施工工艺简述

DLT 5425-2009 深层搅拌法技术规范
http://www.eswnman.net/thread-325606-1-1.html
(出处: 东南西北人)
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ljmtidilgw 发表于 2008-2-18 18:48:17 | 显示全部楼层
看看这个就清楚了,英文叫deep mixing,是一种常用的软基处理方式。
深层搅拌桩施工工艺及动画



Deep Mixing Method
Technology Overview

Deep mixing refers to the blending of cement, lime, slag, and/or other binders in powder or slurry form to stabilize soil in-situ.  When the binder is in powder form, the method is commonly referred to as the dry method.  When the binder is in slurry form, the method is commonly referred to as the wet method.  The choice of application method will depend upon the characteristics of a particular site and the desired performance characteristics of the treated soil.  Mixing can be done with single-axis rotating tools to create single columns, multiple-axis rotating tools to create a set of overlapping columns in a single stroke, chainsaw-like mixing equipment to create continuous panels, mixing probes for mass stabilization, or other devices.  For dry- and wet-method rotary mixing tools, binders are injected through the hollow stem of the rotating tool.

Dry-method rotary equipment is typically lighter than wet-method rotary equipment.  Dry-method columns are typically about 2 to 3 ft in diameter, and wet-method columns can be up to about 8 ft in diameter.  Depths of treatment are typically less than 60 ft for the dry method and 100 ft for the wet method, although greater depths are possible.

Click to enlarge image slide13.jpgClick to enlarge image slide17.jpg

Ground treated by deep mixing methods has higher strength and lower compressibility than untreated ground.  The hydraulic conductivity of the treated ground will be lower than that of the untreated ground for sandy and silty soils, but deep mixing treatment can increase hydraulic conductivity for clay soils.  The strength of ground treated by deep mixing methods depends on such factors as the characteristics of the original ground, characteristics of the binder, amount of binder added, mixing energy, curing conditions, and loading conditions.  Unconfined compressive strengths of treated ground range from about 30 to 400 psi for the dry method and from about 80 to 2,000 psi for the wet method.  Typical contract specification values of unconfined compressive strength range from about 50 to 300 psi.

The Collin Group has utilized deep mixing columns to support a variety of structures from approach embankments for bridges to oil storage tanks.

搅拌法.swf

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dys 发表于 2008-2-19 14:17:32 | 显示全部楼层
我们现在在施工的是干法和湿法搅拌桩。干法:主要是干水泥,湿法:主要是水泥浆。这两种方法都是采用压力将水泥浆或干水泥注入地下并搅拌成桩。

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jiangjun 发表于 2008-3-24 20:36:17 | 显示全部楼层

深层搅拌桩通俗的说法就是水泥搅拌桩

深层搅拌桩通俗的说法就是水泥搅拌桩,是软基处理的一种主要方法。分为粉喷和奖喷两种。主要通过钻杆搅拌泥土和水泥一起拌和而成。

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un.x 发表于 2008-3-25 09:59:33 | 显示全部楼层
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yfp911 发表于 2008-3-25 14:23:04 | 显示全部楼层
好像具体跟旋喷桩差不多
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springkala 发表于 2008-12-11 15:25:26 | 显示全部楼层
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dhw193 发表于 2008-12-12 13:36:12 | 显示全部楼层
主要是用于软基处理,分粉喷桩和湿喷桩两种,原料主要用水泥,有些加适量的石膏粉等等,其中湿喷桩又分单向搅拌和双向搅拌,双向搅拌是东南大学的一个课题,要交专利费的。施工过程中主要控制粉喷量、复搅深度、复搅速度等几个主要指标。不过软基处理是个良心工程,所以楼主要是想控制好的话还是要抓好施工过程中的实际控制。

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