CN114015448A - Foaming agent for improving muck of shield of cohesive soil layer, preparation method and use method - Google Patents
Foaming agent for improving muck of shield of cohesive soil layer, preparation method and use method Download PDFInfo
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- CN114015448A CN114015448A CN202111390605.2A CN202111390605A CN114015448A CN 114015448 A CN114015448 A CN 114015448A CN 202111390605 A CN202111390605 A CN 202111390605A CN 114015448 A CN114015448 A CN 114015448A
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- 239000004088 foaming agent Substances 0.000 title claims abstract description 116
- 239000002689 soil Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 27
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 27
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229930182470 glycoside Natural products 0.000 claims abstract description 26
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 26
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 22
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 22
- 150000002338 glycosides Chemical class 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000005187 foaming Methods 0.000 claims abstract description 18
- 240000005959 Abelmoschus manihot Species 0.000 claims abstract description 15
- 235000001075 Abelmoschus manihot Nutrition 0.000 claims abstract description 15
- 239000011344 liquid material Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000011343 solid material Substances 0.000 claims abstract description 8
- 239000011550 stock solution Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 6
- 229930006000 Sucrose Natural products 0.000 claims description 5
- -1 alkyl sucrose glycoside Chemical class 0.000 claims description 5
- 239000005720 sucrose Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000004181 pedogenesis Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 229910021653 sulphate ion Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
- E21D9/002—Injection methods characterised by the chemical composition used
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a foaming agent for improving muck of a shield of a cohesive soil layer, which comprises a foaming agent base solution, powder abelmoschus manihot gum as an additive and water; the foaming agent base liquid and the water are in a volume ratio of 3-15: 100, the mass part ratio of the additive to the water is 0.025-0.1: 100, respectively; the foaming agent base liquid comprises a solid material of alkyl cane glycoside serving as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate serving as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1. Meanwhile, the invention also discloses a preparation method of the foaming agent for improving the muck of the cohesive soil layer shield and a use method of the foaming agent for improving the muck of the cohesive soil layer shield. The foaming agent is suitable for improvement construction of muck of a cohesive soil layer soil pressure balance shield, the foaming multiplying power of the foaming agent is higher than 20 times, the half-life period is higher than 1200s, the half-life period is almost zero within 5min, the generated foam has high stability, the gas-liquid level strength is high, the foam concentration is high, and the foaming agent can enter a soil body gap to improve the flow plasticity of the soil body.
Description
Technical Field
The invention relates to the technical field of engineering construction materials, in particular to a shield muck foaming agent, a preparation method and a use method thereof, which are particularly suitable for a cohesive soil layer.
Background
The basic reason of the existing shield subway becomes an important part of urban traffic construction, the risk of the shield when passing through a cohesive soil layer mainly comes from the problem of 'blocking' and the problem of mud cake formation caused by the characteristics of the soil layer, and is that the shield cannot normally come out due to the lack of flow plasticity of the cohesive soil body, the soil body is arched due to the increase of the internal pressure of a soil bin, and the phenomenon that the shield continues to be deteriorated in propulsion is caused. The viscous soil body is lack of fluidity, the soil body is solidified under the propelling pressure of the shield to form a hard block, once the problems occur in the shield construction process, the service life of the shield is seriously influenced, and the construction period is prolonged.
The foaming agent can effectively improve the flow plasticity of soil, active molecules in the foaming agent can be directionally arranged on gas-liquid and liquid-solid surfaces to form a stable adsorption film to stabilize the pressure of a soil bin, and the frictional resistance between the soil and a cutter head is reduced, so that the foaming agent is widely applied to shield driving of a cohesive soil layer. The foaming agent adopted in the prior construction generally has the problems that the use parameters depend on construction experience, the cost of the foaming agent is high, the foam has influence on the surrounding environment and the like.
Disclosure of Invention
The invention aims to provide a general foaming agent which is suitable for a cohesive soil layer, has high cost performance, is environment-friendly, stable and reliable, and solves the potential risk caused by lack of flow plasticity of the cohesive soil body during shield tunneling.
Therefore, the technical scheme adopted by the invention is as follows: a foaming agent for improving muck of a cohesive soil layer shield comprises a foaming agent base solution, powder abelmoschus manihot gum as an additive and water; the foaming agent base liquid and the water are in a volume ratio of 3-15: 100, the mass part ratio of the additive to the water is 0.025-0.1: 100, respectively; the foaming agent base liquid comprises a solid material of alkyl cane glycoside serving as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate serving as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
Meanwhile, the invention also discloses a preparation method of the foaming agent for improving the shield muck of the cohesive soil layer, which comprises the following steps:
(a) preparing foaming agent base liquid by using solid alkyl sucrose glycoside as a main foaming agent and liquid fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent according to the volume part ratio of 2: 1;
(b) taking powder abelmoschus manihot gum as an additive, wherein the weight part ratio of the additive to water is 0.025-0.1: 100 is added into water;
(c) and then according to the volume parts of the foaming agent base liquid and water being 3-15: 100, slowly adding water into the foaming agent base solution, and stirring for more than 20min until the mixture is uniformly mixed to obtain the foaming agent stock solution.
In addition, the invention also discloses a using method of the cohesive soil stratum muck improvement universal foaming agent, which comprises the following steps: (1) transporting the prepared foaming agent stock solution to the interior of a shield of a construction site through a foam box; (2) and adding water into the foaming agent stock solution for dilution to serve as a final foaming solution for improving the soil body, wherein when the water content of the excavated cohesive soil layer is 40-50%, the volume concentration of the foaming agent stock solution is 3-5%, and the injection ratio of the foaming solution is 30-50%.
The invention has the beneficial effects that: the foaming agent has the characteristics of strong foaming capacity and good foam stability, the generated foam particles are uniform, green and pollution-free, more than 99 percent of components can be biodegraded in the exposed air, and the environment is not polluted. The specific beneficial effects of the components are as follows:
1. alkyl sucrose glucoside is used as a main foaming agent. When the concentration of the alkyl cane glycoside is 2-5%, the foaming multiplying power is stable and is about 15 times, and the half-life period is not ideal and is lower than 500 s; the half defoaming rate is more than 30 percent in 5min, and the alkyl cane glycoside is a completely green material foaming agent material which can be completely biodegraded and has low cost. The scheme selects the alkyl cane glycoside as the main foaming agent, and greatly reduces the manufacturing cost by utilizing the advantages of low price and green degradation.
2. Fatty alcohol-polyoxyethylene ether sodium sulfate is used as an auxiliary foaming agent. When the concentration of the sodium alcohol ether sulphate is 2-4%, the foaming multiplying power is higher and is more than 20 times; the half-life performance is generally basically maintained at about 600 s; the defoaming rate is within the interval of 5-10% within 5 min; the material is easy to biodegrade, the natural degradation degree is more than 90%, the environment is not polluted, most of the existing shield muck improvement construction uses the material as a main foaming agent, but the guide concentration is higher and is generally about 10%, but the cost is expensive. The sodium alcohol ether sulphate is colloidal, can not be completely dissolved in water by on-site stirring, still can have a large amount of precipitates after stirring to cause serious waste, and can still not meet the construction requirements by using the half-life period and the defoaming rate within 5min independently, and is usually used as a main foaming agent. The technical scheme selects the sodium alcohol ether sulphate as the auxiliary foaming agent, perfectly avoids the defect of high price, and fully utilizes the characteristic of high foaming multiplying power.
3. Abelmoschus manihot gum is used as stabilizer. The abelmoschus manihot gum has high viscosity in water, can be used as a thickening agent and a stabilizing agent to improve foam stability, can provide a certain lubricating effect after being dissolved in water, and reduces the friction force between a soil body and a cutter head. However, the abelmoschus manihot gum is mostly applied to food, medicine, daily chemical industry and other industries at present, is not specifically applied to shield muck improvement, is natural and pollution-free, and has low price, so that the environmental problem and the cost problem left by the existing construction can be solved.
In the test process, firstly, alkyl cane glycoside is used as a main foaming agent, fatty alcohol-polyoxyethylene ether sodium sulfate is used as an auxiliary foaming agent, the self-thermal degradation degree of the alkyl cane glycoside is higher than that of the fatty alcohol-polyoxyethylene ether sodium sulfate, the cost of the alkyl cane glycoside is far lower than that of the fatty alcohol-polyoxyethylene ether sodium sulfate, the main foaming agent can improve the overall natural degradation rate of the foaming agent, the production cost is reduced, and the problem of waste caused by the fact that the fatty alcohol-polyoxyethylene ether sodium sulfate cannot be completely dissolved in water is solved to a certain extent.
However, in the test process of continuously adjusting the proportion, the volume part ratio of the alkyl sucrose glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is controlled to be 2:1, meanwhile, the abelmoschus manihot gum used in the food industry is creatively introduced into the shield foaming agent as a stabilizer, so that the advantages and the disadvantages can be well improved, the foaming ratio of the obtained foaming agent is kept to be higher than 20 times, the minimum half-life period is greatly improved to be higher than 1200s, and the foaming ratio can be reduced to 0% within 5 min.
In conclusion, the foaming agent is suitable for improvement construction of muck of a cohesive soil earth pressure balance shield, the foaming multiplying power of the foaming agent is higher than 20 times, the half-life period is higher than 1200s, the half-life period is almost zero within 5min, the generated foam is high in stability, the air-liquid level strength is high, the foam concentration is high, and the foaming agent can enter a soil body gap to improve the flow plasticity of the soil body.
Detailed Description
The invention is further illustrated by the following examples:
a foaming agent for improving muck of a cohesive soil layer shield comprises a foaming agent base solution, powder abelmoschus manihot gum as an additive and water; the foaming agent base liquid and the water are in a volume ratio of 3-15: 100, the mass part ratio of the additive to the water is 0.025-0.1: 100, respectively; the foaming agent base liquid comprises a solid material of alkyl cane glycoside serving as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate serving as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
A preparation method of a cohesive soil stratum muck improvement universal foaming agent comprises the following steps:
(a) preparing foaming agent base liquid by using solid alkyl sucrose glycoside as a main foaming agent and liquid fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent according to the volume part ratio of 2:1, and uniformly stirring;
(b) taking powder abelmoschus manihot gum as an additive, wherein the weight part ratio of the additive to water is 0.025-0.1: 100 is added into water;
(c) and then according to the volume parts of the foaming agent base liquid and water being 3-15: 100, slowly adding water into the foaming agent base solution, and stirring for more than 20min until the mixture is uniformly mixed to obtain the foaming agent stock solution.
A method for using a universal foaming agent for improving cohesive soil formation muck comprises the following steps: (1) transporting the prepared foaming agent stock solution to the interior of a shield of a construction site through a foam box; (2) and adding water into the foaming agent stock solution for dilution to serve as a final foaming solution for improving the soil body, wherein when the water content of the excavated cohesive soil layer is 40-50%, the volume concentration of the foaming agent stock solution is 3-5%, and the injection ratio of the foaming solution is 30-50%. When the water content of the excavated cohesive soil layer is lower, the injection ratio can be increased, or the excavation is carried out by adopting a mode of alternately operating injected water and injected foaming agent, and the specific parameters are determined according to specific conditions.
Example 1 a foamer for improving shield muck in a cohesive soil layer comprises a foamer base fluid, powdered abelmoschus manihot gum as an additive, and water. The foaming agent base liquid and the water are in parts by volume of 3: 100, the mass part ratio of the additive to the water is 0.05: 100. the foaming agent base liquid comprises a solid material of alkyl cane glycoside as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
Example 2 a foaming agent for improving shield muck in a cohesive soil layer, comprising a foaming agent base fluid, powder abelmoschus manihot gum as an additive, and water. The foaming agent base liquid and the water are in parts by volume of 3: 100, the mass part ratio of the additive to the water is 0.075: 100. the foaming agent base liquid comprises a solid material of alkyl cane glycoside as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
Example 3 a foamer for improving shield muck in a cohesive soil layer, comprising a foamer base fluid, powdered abelmoschus manihot gum as an additive, and water. The foaming agent base liquid and the water are 6 parts by volume: 100, the mass part ratio of the additive to the water is 0.025: 100. the foaming agent base liquid comprises a solid material of alkyl cane glycoside as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
Example 4 a foaming agent for improving shield muck in a cohesive soil layer, comprising a foaming agent base fluid, powder abelmoschus manihot gum as an additive, and water; the foaming agent base liquid and the water are 15 parts by volume: 100, the mass part ratio of the additive to the water is 0.1: 100, respectively; the foaming agent base liquid comprises a solid material of alkyl cane glycoside as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
Comparative example 1 a cohesive soil layer shield muck foaming agent comprising liquid materials of sodium fatty alcohol-polyoxyethylene ether sulfate and water; the volume of the liquid fatty alcohol-polyoxyethylene ether sodium sulfate accounts for 3 percent.
Table 1 shows the results of experiments on the foaming ratio and half-life in a static state of the foaming agents prepared in examples 1 to 4 and the foaming agent prepared in comparative example 1:
TABLE 1 foaming Performance test results for different foaming agent types
| Kinds of foaming agents | Expansion ratio | Half-life(s) | Defoaming Rate within 5min (%) |
| Example 1 | 23.70 | 1350 | 0 |
| Example 2 | 23.80 | 2078 | 0 |
| Example 3 | 23.17 | 1221 | 0 |
| Example 4 | 22.31 | 1316 | 0 |
| Comparative example 1 | 27.13 | 616 | 7.23 |
As can be seen from Table 1, in examples 1-4, compared with comparative example 1, the foaming times of the foaming agents prepared according to the formulation ratio of the invention are slightly reduced but still can reach more than 20 times, the standing half-life period is improved by more than 2 times, and the defoaming rate within 5min is almost zero.
In order to further verify the improvement effect of the invention, a plurality of rings are selected for field construction tests. The results show that the formula adopted by the invention obviously reduces the cutter torque, the cutter torque value of the comparative example is 1500-2300 KNm, and the cutter torque value of the embodiment is 1300-1500 KNm; the total thrust of the shield is also reduced; the formula adopted by the invention can effectively reduce the soil body strength, reduce the friction force between the soil body and the cutter head and reduce the cutter head loss. The formula adopted by the invention effectively increases the flow plasticity of the slag soil in the experimental section, the slump of the obtained slag soil is 50-70 mm, the caking of the slag soil with the foaming agent used by the construction site is obvious, and the slump of the slag soil after construction is 0 mm. Through the application of actual engineering, the method has great advantages in the aspects of field construction effect, material price, environmental protection and the like, and has certain guiding significance for actual shield construction.
The raw materials involved in the invention are nontoxic and harmless, can be naturally degraded for the environment, and belong to green materials.
Claims (3)
1. The foaming agent for improving the muck of the cohesive soil layer shield is characterized by comprising the following components in parts by weight: comprises foaming agent base liquid, powder abelmoschus manihot gum as an additive and water; the foaming agent base liquid and the water are in a volume ratio of 3-15: 100, the mass part ratio of the additive to the water is 0.025-0.1: 100, respectively; the foaming agent base liquid comprises a solid material of alkyl cane glycoside serving as a main foaming agent, a liquid material of fatty alcohol-polyoxyethylene ether sodium sulfate serving as an auxiliary foaming agent, and the volume part ratio of the alkyl cane glycoside to the fatty alcohol-polyoxyethylene ether sodium sulfate is 2: 1.
2. A preparation method of a cohesive soil stratum muck improvement universal foaming agent is characterized by comprising the following steps:
(a) preparing foaming agent base liquid by using solid alkyl sucrose glycoside as a main foaming agent and liquid fatty alcohol-polyoxyethylene ether sodium sulfate as an auxiliary foaming agent according to the volume part ratio of 2: 1;
(b) taking powder abelmoschus manihot gum as an additive, wherein the weight part ratio of the additive to water is 0.025-0.1: 100 is added into water;
(c) and then according to the volume parts of the foaming agent base liquid and water being 3-15: 100, slowly adding water into the foaming agent base solution, and stirring for more than 20min until the mixture is uniformly mixed to obtain the foaming agent stock solution.
3. A using method of a universal foaming agent for improving cohesive soil formation muck is characterized by comprising the following steps: (1) transporting the prepared foaming agent stock solution of claim 1 or 2 to the interior of a shield at a construction site through a foaming box; (2) and adding water into the foaming agent stock solution for dilution to serve as a final foaming solution for improving the soil body, wherein when the water content of the excavated cohesive soil layer is 40-50%, the volume concentration of the foaming agent stock solution is 3-5%, and the injection ratio of the foaming solution is 30-50%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111390605.2A CN114015448A (en) | 2021-11-23 | 2021-11-23 | Foaming agent for improving muck of shield of cohesive soil layer, preparation method and use method |
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Cited By (1)
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| CN109574543A (en) * | 2018-12-30 | 2019-04-05 | 陕西师范大学 | One kind is cast-in-place to build foam concrete composite foamable agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114806586A (en) * | 2022-03-31 | 2022-07-29 | 郑州地铁集团有限公司 | Water-alcohol-based foaming agent for shield, and manufacturing system and manufacturing method thereof |
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