A kind of earth pressure balance shield foaming agent
A technology of earth pressure balance shield and foam agent, which is applied in the direction of building construction, soil conditioning materials, organic fertilizers, etc., and can solve the problems of foam uniformity, stability, lubricity and permeability. Limited performance and other issues, to achieve the effect of improving workability and fluidity, no pollution to the soil, and protecting the tool
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Embodiment 1
[0028] In this embodiment, the special foaming agent for earth pressure balance shield machine is composed of the following ingredients according to the percentage calculation: sodium lauryl sulfate 6%, cetyl trimethyl ammonium chloride 8%, cocamidopropyl 6% betaine, 3% lauryl dimethyl ammonium oxide, 0.2% disodium edetate, 1.0% ammonium chloride, and the balance is 75.8% water.
Embodiment 1
[0031] The foam rate of the product obtained in Example 1 was 30 times, and the foam stabilization time was 35 minutes.
Embodiment 2
[0033] In this embodiment, the special foaming agent for earth pressure balance shield machine is composed of the following ingredients according to the percentage calculation: sodium lauryl sulfate 9%, cetyltrimethylammonium chloride 6%, cocamidopropyl 5% betaine, 3% lauryl dimethyl ammonium oxide, 0.1% disodium edetate, 1.5% ammonium sulfate, 75.4% water.
[0034] When using the foaming agent in the present invention, since the foaming agent needs to be diluted with water when used, the recommended dosage for different formations is the following table, by weight percentage, so that better results can be obtained.
[0035]
[0036]
[0037] The use effect of foaming agent provided by the embodiment of the present invention 1 and 2 is as follows:
[0038]
[0039] It can be seen from the above data that the foaming agent in the present invention exhibits excellent lubricating performance in shield tunneling construction, significantly reduces the torque of the cutter...
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