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Foaming agent for shield machine

A technology of foam agent and shield machine, applied in the field of foam agent, can solve the problems of less research on foam agent, high price, high construction cost, etc., and achieve the effect of strengthening sealing, improving working performance and reducing energy consumption

Inactive Publication Date: 2016-12-07
天津盾构科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, many domestic scientific research institutes have carried out research on foam adhesives, but most of the research directions are sandy pebble formations or sandy gravel formations, and there are few studies on foaming agents in hard plastic and soft plastic expansive clays. The foam agents used in similar formations are all imported products, which are expensive and the construction cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A foaming agent for shield machines, made by mixing and stirring the following raw materials at a water temperature of 30 to 50°C in mass percentages: sodium lauryl sulfate (K12) 6%, fatty alcohol polyoxyethylene Sodium ether sulfate (AES) 2%, sodium α-olefin sulfonate (AOS) 1.5%, modified silicone resin polyether emulsion (MPS) 1.5%, water 89%.

[0019] The foaming agent produced in this example is used in an amount of 2%. According to experiments, the foam stabilization time at room temperature is 21 minutes, the foaming ratio is 18 times, and the foam bearing capacity is good. The field use effect is good, reaching the level of imported products, and its foam stabilization effect is excellent.

Embodiment 2

[0020] Example 2: A foaming agent for shield machines, which is made by mixing and stirring the following raw materials at a water temperature of 30-50°C in mass percentages: sodium lauryl sulfate (K12) 5%, fatty alcohol polyoxyethylene Sodium ether sulfate (AES) 4%, sodium α-olefin sulfonate (AOS) 1.5%, modified silicone resin polyether emulsion (MPS) 1.3%, water 88.2%.

[0021] The foam agent produced in this example adopts the dosage of 2%. According to the experiment, the foam stabilization time is 18 minutes at room temperature, the expansion ratio is 15 times, and the foam bearing capacity is good. The on-site use effect is good, the cost is lower than that of Example 1, and the improvement effect of the muck soil is good.

[0022] Compared with the above foaming agents, the anionic surfactant compound foaming agent has the characteristics of simple formula and suitable for clay. Other foam agents are mainly compounded with anion and neutral ions, mixed with additives s...

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Abstract

The invention belongs to the technical field of foaming agents, and particularly relates to a foaming agent for a shield machine. In order to solve the problems that various properties including the uniformity, the stability, the lubricating properties, the permeability and the like of foams of a domestic foaming agent at current cannot completely meet requirements for foams in shield tunneling, and the adaptability of the foaming agent has certain limit, the invention provides the foaming agent for the shield machine, and the foaming agent is prepared from sodium dodecylsulfate, sodium alcohol ether sulphate, sodium alpha-olefin sulfonate, modified polyethoxylated silicone, and water in a certain proportion. According to the foaming agent disclosed by the invention, the working performance of soil is improved, so that the soil forms plastic deformation to provide uniform and controllable support pressure, and a working surface is stable; leakage is reduced, the sealing properties of the working surface are strengthened, internal frictional force is reduced, abrasion of the soil on cutter heads, conveyors and conveyer belts is reduced, and the energy consumption is reduced; the viscosity of a soil mass is reduced, and generation of plugging is avoided; and the foaming agent has the effect of restraining dust during construction of rock and soil tunnels and mines.

Description

technical field [0001] The invention belongs to the technical field of foaming agents, and in particular relates to a foaming agent for a shield machine. Background technique [0002] In recent years, subway tunnel projects have been excavated by a mechanical device called a shield machine. The type of shield machine currently used is mainly an earth pressure balance shield machine, which is characterized by using excavated muck as a support The stable medium of the excavation surface requires the muck as the supporting medium to have good plastic deformation, soft consistency and low permeability. Since the general soil cannot fully meet these characteristics, it needs to be improved. The technical point is to inject foam and other mixed materials into the front of the cutterhead of the shield machine and the soil bin, and then vigorously stir to improve the plasticity and stability of the excavated dregs. Mobility, reduce the water permeability of muck. This foam is prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/38C09K103/00
Inventor 王守新
Owner 天津盾构科技发展有限公司
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