Slurry injection technique of double-valve sleeve valve tube of cloth bag

A sleeve valve pipe grouting and sleeve valve pipe technology is applied in soil protection, sheet pile walls, construction and other directions, which can solve problems such as long construction period, shorten construction time, save costs, and reduce the effect of soil squeeze.

Active Publication Date: 2010-02-10
CRCC HARBOR & CHANNEL ENG BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, conventional sleeve valve pipe grouting needs to pour the casing material, and wait for the casing material to solidify and increase in strength before grouting, and the construction period is long

Method used

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  • Slurry injection technique of double-valve sleeve valve tube of cloth bag
  • Slurry injection technique of double-valve sleeve valve tube of cloth bag
  • Slurry injection technique of double-valve sleeve valve tube of cloth bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Making double-valve cloth bag sleeve valve tube: such as figure 1 As shown in the schematic diagram, use geotextiles to sew a cloth bag with the same length as the sleeve valve pipe, and its volume is 0.6 to 0.9 times the grouting volume. The tensile strength and suture strength of the cloth bag should be greater than 15kN / m. Put the cloth bag on the sleeve valve pipe, and use plastic buckles to firmly bind the cloth on the sleeve valve pipe every 1.5-2m. The plastic buckle must not be opened before the designed grouting pressure is reached. Fix 1 to 2 drainage boards on the cloth bag by pasting or other methods, and the drainage boards are arranged symmetrically.

[0024] (2) Grouting construction: use geological drilling rigs and other equipment to drill a hole with a diameter of not less than 10cm, insert the double valve pipe into the hole, and use the same grouting equipment as the sleeve valve pipe for grouting, that is, use grouting Grout gun for grouting. ...

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Abstract

The invention relates to a slurry injection technique of a double-valve sleeve valve tube of a cloth bag. For overcoming the defect of the slurry injection technique of a sleeve valve tube, a cloth bag made of geotextile is sleeved on a sleeve valve tube and is firmly bound on the sleeve valve tube at the interval of 1.5-2 m by plastic buckles; mechanical equipment is used for drilling holes to the design depth; the made double-valve sleeve valve tube of the cloth bag is installed; slurry is injected in segments from top to bottom; after each slurry injection segment reaches the designed slurry injection pressure, the plastic buckles can be automatically opened; and meanwhile, one to two plastic drainage plates are arranged outside the cloth bag, thereby eliminating partial water in slurryliquid, dissipating the super-static pore water pressure of injection slurry in a foundation and reducing the soil squeezing effect. The double-valve tube is used for directly injecting slurry, doesnot need sleeve shell material, is not easy to leak slurry and is easy to form a column body.

Description

technical field [0001] The invention relates to a soft soil foundation grouting reinforcement technology, in particular to a double-valve cloth bag sleeve valve pipe grouting technology, which is innovative on the basis of the sleeve valve pipe grouting technology and belongs to the technical field of foundation and foundation engineering construction. Background technique [0002] Sleeve valve pipe grouting technology is widely used in foundation pit curtain, foundation and dam area reinforcement projects. The conventional sleeve pipe grouting technology construction process is: drilling→filling casing material→inserting sleeve valve pipe→casing material After the specified strength is reached, the grouting is performed in sections. [0003] A large number of engineering practices have shown that the grout diffusion range of sleeve valve pipe grouting is difficult to control, usually cannot form a continuous pile body, and is prone to grout leakage. The grout injected into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38E02D3/10
Inventor 刘吉福彭志军黄腾陈延猛
Owner CRCC HARBOR & CHANNEL ENG BUREAU GRP
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