CN103059874B - Soil pressure balance shield foam modifying agent and preparation method thereof - Google Patents
Soil pressure balance shield foam modifying agent and preparation method thereof Download PDFInfo
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- CN103059874B CN103059874B CN201310032349.9A CN201310032349A CN103059874B CN 103059874 B CN103059874 B CN 103059874B CN 201310032349 A CN201310032349 A CN 201310032349A CN 103059874 B CN103059874 B CN 103059874B
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Abstract
The invention relates to a soil pressure balance shield foam modifying agent and a preparation method thereof. The soil pressure balance shield foam modifying agent is prepared from the following raw materials in parts by weight: 10 to 20 parts of lauryl sodium sulfate, 5 to 15 parts of OP-10, 0.5 to 2 parts of lauryl alcohol, 0.3 to 1 part of hydroxypropyl guar gum, 5 to 10 parts of ammonia chloride, and 1,000 parts of water. The preparation method of the soil pressure balance shield foam modifying agent comprises the process steps of dissolving the raw materials and the like. The foam modifying agent is obvious in modifying effect, can meet requirements for site construction, has the effects of excellent performance, reasonable price, wide matching, safety and environment friendliness, is strong in applicability, and can meet requirements of sandy cobble stratum soil pressure balance shield constructions in Beijing area through indoor and field tests; and the preparation method is easy and convenient to operate.
Description
Technical field
The present invention relates to a kind of Soil pressure balance shield foam modifying agent and preparation method thereof, belong to field of material technology.
Background technology
Earth pressure balanced shield, EPBS is used widely in Construction of Beijing Subway, and achieves huge economic and social benefit.But due to the singularity on stratum, Beijing, namely sandy gravel and sandy gravel content relatively high, the creeping of the soil body is poor, thus easily causes excavation face unstability, pressure tank obturation, pressure tank molding, the technical barrier of gushing, often running in the construction of the sandy soil layer such as cutterhead serious wear.Therefore, in order to ensure normally carrying out of shielded construction, the soil body must have good creeping, has low water-permeable to stop underground water simultaneously.For this reason, must adopt and mould fluidization technique, namely inject material modified (as mud, foam etc.) to excavation face, soil pressure storehouse (if desired to worm conveyor), to ensure that excavation face is stablized, realize earth pressure balance driving, be conducive to reducing mechanical load simultaneously, reduce land subsidence, improve driving speed.Along with the continuous application of shield technique in Construction of Beijing Subway, although have accumulated rich experiences and obtain important breakthrough at some technological layer, success, use earth pressure balanced shield, EPBS still be unable to do without the innovation of soil improvement technology and rationally apply economically.
Earth pressure balanced shield, EPBS foaming agent is generally made up of whipping agent, suds-stabilizing agent and auxiliary agent.The foaming agent overwhelming majority that the shield structure understood at present uses is by anion surfactant and nonionogenic tenside is composite forms main foaming agent, be equipped with suds-stabilizing agent again, some products also need to add the composite auxiliary agent, expanding material etc. that can produce synergistic effect corresponding to tensio-active agent.All the components by a certain percentage, is mixed to form foaming agent product by rights.At present, the foam major part that Beijing Metro shielded construction adopts is imported product, though the good high cost of effect.Generally, the use of foam modifying agent lacks judgement criteria and the evaluation method of corresponding theoretical direction and necessity, brings a various difficult problem to shielded construction, can be summarized as generally following some:
1) to the matching relationship of the essential property of foam modifying agent and the soil body, improved effect and and shield tunnelling parameters relation etc. lack relevant theoretical investigation, cause the blindness that foam modifying agent in shielded construction uses: a kind of situation be foam modifying agent select not mate with formation physical property or stratigraphic fluctuation time do not change modifying agent in time, cause soil improvement effect bad, cause being unearthed difficulty, tool wear seriously, occur engineering accident; Next be run into geologic condition bad time, without targetedly strengthen modifying agent inject parameters, cause waste; The third is for saving construction cost in shielded construction, reduce usage quantity irrelevantly, soil improvement effect is caused to reduce, cause the serious problems such as difficulty, tool wear of being unearthed, the reduction of usual this improved effect is so that the appearance of difficulty of being unearthed, there is certain lag-effect, easily ignored by operator in construction process.
2) application of foam represents the developing direction of modifying agent, but mostly relies on import at present, and thus cost, deficiency in economic performance large compared with high, construction cost, is therefore necessary the independent research carrying out foaming agent very much.
3) research and apply of soil improvement technology lacks corresponding codes and standards at present, selected and the conservative control etc. of the determination of the selection of modifying agent kind, grout coordinate ratio, performance perameter and index and control method, injection parameter all relies on test in place or engineering experience to formulate, cause the significant wastage of human and material resources and financial resources, even also likely cause Important Project accident.
Summary of the invention
In view of this, the object of this invention is to provide a kind of Soil pressure balance shield foam modifying agent and preparation method thereof, the foam modifying agent improved effect made by this method is obvious, site operation needs can be met, there is the features such as superior performance, reasonable price, matching are wide, safety and environmental protection, solve some problems of the soil improvement technology existed in the sand-pebble layer shielded construction of Beijing.
Soil pressure balance shield foam modifying agent provided by the present invention is in process for preparation, various system component can not arbitrarily add, and in a certain order and method, just must can configure the foaming agent of stable performance, for achieving the above object, the present invention takes following technical scheme:
A kind of Soil pressure balance shield foam modifying agent, described Soil pressure balance shield foam modifying agent is made up of the raw material of following parts by weight:
Preferably, wherein said Soil pressure balance shield foam modifying agent is made up of the raw material of following parts by weight:
Preferably, wherein said OP-10(triton x-100) chemical formula be C
34h
62o
11.
Preferably, the granularity of wherein said hydroxypropylguar gum is 100 object pale yellow powders, and its apparent viscosity is 100mpas.
The present invention also provides the preparation method of above-mentioned Soil pressure balance shield foam modifying agent, comprises the following steps:
(1) in the water of formula ratio, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300-320r/min, make it fully to dissolve (because guar gum is macromole vegetable jelly in water, need when dissolving in water fully to stir and could dissolve, and must be stir under high rotating speed to allow it fully dissolve in water, consider that whipping agent can not high-speed stirring, so first add guar gum);
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 45-50r/min, and add the sodium lauryl sulphate of formula ratio, stir (agitator speed must be kept as far as possible low when adding sodium lauryl sulphate, if the too high solution of rotating speed easily bubbles);
(3) add in step (2) gained solution in the lump after the lauryl alcohol of formula ratio and OP-10 1-4 part dehydrated alcohol being dissolved completely, stir (because lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if these two kinds formulas are directly added in solution the dissolving being unfavorable for both, so need in advance it to be dissolved completely with a small amount of alcohol);
(4) finally add the ammonium chloride of formula ratio, fully stir with 45-50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Soil pressure balance shield foam modifying agent provided by the present invention, wherein sodium lauryl sulphate (SDS) is composite with OP-10 is whipping agent, lauryl alcohol is suds-stabilizing agent, hydroxypropylguar gum is tackifier, ammonium chloride has good hydrotropy effect to SDS/OP-10 system, lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if it directly to be added in solution the dissolving being unfavorable for both, so after lauryl alcohol, OP-10 must dissolve completely under a small amount of alcohol, then to join together in solution.
The invention has the advantages that: foam modifying agent provided by the present invention, its improved effect is obvious, site operation needs can be met, have that superior performance, reasonable price, matching are wide, the effect of safety and environmental protection, suitability is strong, by test that is indoor and test in place, the requirement of Beijing area sand-pebble layer earth pressure balanced shield, EPBS construction can be met; And this preparation method, easy and simple to handle.
Embodiment
For describing various active principle composition of the present invention, preparation method in detail, being listed below embodiment and describing in detail.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of Soil pressure balance shield foam modifying agent, be made up of the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, purchased from Chemical Reagent Co., Ltd., Sinopharm Group; OP-10(triton x-100) be chemical pure, purchased from Beijing chemical reagents corporation; Lauryl alcohol is purchased from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is purchased from Renqiu City Yan Xing Chemical Co., Ltd. of Hebei province; Ammonium chloride is purchased from Zhuzhou Jianghai Environmental Protection Co., Ltd..
The preparation method of above-mentioned Soil pressure balance shield foam modifying agent, comprises the following steps:
(1) in 1000 parts of water, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300r/min, make it fully to dissolve in water;
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 50r/min, and adds 15 parts of sodium lauryl sulphate, stirs;
(3) add in step (2) gained solution in the lump after 1 part of lauryl alcohol and 10 parts of OP-10 being dissolved completely with 2 parts of dehydrated alcohols, stir (because lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if these two kinds formulas are directly added in solution the dissolving being unfavorable for both, so need in advance it to be dissolved completely with a small amount of alcohol);
(4) finally add 6.0 parts of ammonium chlorides, fully stir with 50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Wherein sodium lauryl sulphate is chemical pure, purchases Chemical Reagent Co., Ltd., Sinopharm Group; OP-10(triton x-100) be chemical pure, purchased from Beijing chemical reagents corporation; Lauryl alcohol is purchased from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is purchased from Renqiu City Yan Xing Chemical Co., Ltd. of Hebei province; Ammonium chloride is purchased from Zhuzhou Jianghai Environmental Protection Co., Ltd..
Embodiment 2
Wherein sodium lauryl sulphate is chemical pure, purchased from Chemical Reagent Co., Ltd., Sinopharm Group; OP-10(triton x-100) be chemical pure, purchased from Beijing chemical reagents corporation; Lauryl alcohol is purchased from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is purchased from Renqiu City Yan Xing Chemical Co., Ltd. of Hebei province; Ammonium chloride is purchased from Zhuzhou Jianghai Environmental Protection Co., Ltd..
The preparation method of above-mentioned Soil pressure balance shield foam modifying agent, comprises the following steps:
(1) in 1000 parts of water, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300r/min, make it fully to dissolve in water;
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 50r/min, and adds 15 parts of sodium lauryl sulphate, stirs;
(3) add in step (2) gained solution in the lump after 1.5 parts of lauryl alcohols and 15 parts of OP-10 being dissolved completely with 2 parts of dehydrated alcohols, stir (because lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if these two kinds formulas are directly added in solution the dissolving being unfavorable for both, so need in advance it to be dissolved completely with a small amount of alcohol);
(4) finally add 10 parts of ammonium chlorides, fully stir with 50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Embodiment 3
A kind of Soil pressure balance shield foam modifying agent, be made up of the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, purchased from Chemical Reagent Co., Ltd., Sinopharm Group; OP-10(triton x-100) be chemical pure, purchased from Beijing chemical reagents corporation; Lauryl alcohol is purchased from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is purchased from Renqiu City Yan Xing Chemical Co., Ltd. of Hebei province; Ammonium chloride is purchased from Zhuzhou Jianghai Environmental Protection Co., Ltd..
The preparation method of above-mentioned Soil pressure balance shield foam modifying agent, comprises the following steps:
(1) in 1000 parts of water, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300r/min, make it fully to dissolve in water;
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 50r/min, and adds 15 parts of sodium lauryl sulphate, stirs;
(3) add in step (2) gained solution in the lump after 1.2 parts of lauryl alcohols and 15 parts of OP-10 being dissolved completely with 2 parts of dehydrated alcohols, stir (because lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if these two kinds formulas are directly added in solution the dissolving being unfavorable for both, so need in advance it to be dissolved completely with a small amount of alcohol);
(4) finally add 6.0 parts of ammonium chlorides, fully stir with 50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Embodiment 4
A kind of Soil pressure balance shield foam modifying agent, be made up of the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, purchased from Chemical Reagent Co., Ltd., Sinopharm Group; OP-10(triton x-100) be chemical pure, purchased from Beijing chemical reagents corporation; Lauryl alcohol is purchased from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is purchased from Renqiu City Yan Xing Chemical Co., Ltd. of Hebei province; Ammonium chloride is purchased from Zhuzhou Jianghai Environmental Protection Co., Ltd..
The preparation method of above-mentioned Soil pressure balance shield foam modifying agent, comprises the following steps:
(1) in 1000 parts of water, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300r/min, make it fully to dissolve in water;
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 50r/min, and adds 15 parts of sodium lauryl sulphate, stirs;
(3) add in step (2) gained solution in the lump after 1 part of lauryl alcohol and 7.5 parts of OP-10 being dissolved completely with 2 parts of dehydrated alcohols, stir (because lauryl alcohol used becomes solid at normal temperatures, OP-10 is liquid, if these two kinds formulas are directly added in solution the dissolving being unfavorable for both, so need in advance it to be dissolved completely with a small amount of alcohol);
(4) finally add 6.0 parts of ammonium chlorides, fully stir with 50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Embodiment 5
Two important evaluation indexes of foaming agent performance are frothing percentage and stability.
1, frothing percentage experiment
Frothing percentage is also called " expansion ratio ", refers to the ratio of the bubble volume that the foaming agent solution of certain volume sends and foaming agent solution volume, i.e. the volume that bubbles up of every volume foaming agent solution.Following formula is shown in its definition:
In formula: ER-frothing percentage; V
f-bubble volume; V
l-foaming agent solution volume.
The measurement of frothing percentage is realized by measuring cup with a scale, and testing sequence is as follows:
The foam modifying agent configured is divided into 5 groups, often organize 3 parts, first group, second group, the 3rd group, Four composition is for the test of inventive embodiment 1, embodiment 2, embodiment 3, embodiment 4,5th group is domestic foam modifying agent (purchased from Beijing along tunnel construction Technology Co., Ltd. of Futong), and difference label;
1. with the foaming agent solution foaming that indoor foam device will prepare in advance, in foaming process, regulate foam device, until obtain required bubble, and make this state keep stable;
2. after foam device keeps stablizing foamed state, observe the scale holding foaming agent solution beaker, a selected start index, start in measuring cup, add each group of foam modifying agent, treat that foam is filled measuring cup postscript and recorded now beaker scale.
3. by each group of test-results data preparation, average.
Test-results is as shown in table 1.
The frothing percentage of table 1 foaming agent compares
As can be seen from Table 1, the frothing percentage of the Soil pressure balance shield foam modifying agent of the embodiment of the present invention 1 ~ 4, higher than domestic foam modifying agent, illustrates that the improved effect of modifying agent of the present invention is good.
2, stability experiment
The stability of foam is weighed by foam defoamed ratio, and defoamed ratio is one of important parameter characterizing bubble stability, and following formula is shown in its definition:
In formula: F
s-defoamed ratio; M
dthe quality of-dissipation bubble; M
0-bubble initial mass.
In the relation curve of defoamed ratio and time, the time of defoamed ratio corresponding to 50% is called " transformation period " of bubble, and the stability of foam was weighed with the transformation period of foam.The transformation period of foaming agent is as shown in table 2 after measured:
The table 2 foaming agent transformation period compares
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Domestic foam modifying agent | |
| Transformation period | 11min32s | 10min16s | 10min5s | 9min18s | 8min10s |
As can be seen from Table 2, the transformation period of the Soil pressure balance shield foam modifying agent of the embodiment of the present invention 1 ~ 4, higher than domestic foam modifying agent, illustrates that the improved effect of modifying agent of the present invention is good.
The above, be only embodiments of the invention, should be understood that; for the those of ordinary skill in this technology; under the prerequisite not departing from core technical features of the present invention, can also do some improvements and modifications, these retouchings and improvement also should belong to scope of patent protection of the present invention.
Claims (2)
1. a Soil pressure balance shield foam modifying agent, is characterized in that, described Soil pressure balance shield foam modifying agent is made up of the raw material of following parts by weight:
Sodium lauryl sulphate 10-20 part;
OP-10 5-15 part;
Lauryl alcohol 0.5-2 part;
Hydroxypropylguar gum 0.3-1 part;
Ammonium chloride 5-10 part;
1000 parts, water;
Wherein, the chemical formula of described OP-10 is C
34h
62o
11; Described hydroxypropylguar gum is 100 object pale yellow powders, and its apparent viscosity is 100mpas;
Obtained by following steps:
(1) in the water of formula ratio, first add the hydroxypropylguar gum of formula ratio, and stir with the rotating speed of 300-320r/min, make it fully to dissolve in water;
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 45-50r/min, and adds the sodium lauryl sulphate of formula ratio, stirs;
(3) add in the lump in step (2) gained solution after the lauryl alcohol of formula ratio and OP-10 1-4 part dehydrated alcohol being dissolved completely, stir;
(4) finally add the ammonium chloride of formula ratio, fully stir with 45-50r/min, dehydrated alcohol is fully volatilized complete, obtain described foam modifying agent.
2. Soil pressure balance shield foam modifying agent as claimed in claim 1, it is characterized in that, described Soil pressure balance shield foam modifying agent is made up of the raw material of following parts by weight:
Sodium lauryl sulphate 15 parts;
OP-10 10 parts;
Lauryl alcohol 1 part;
Hydroxypropylguar gum 0.6 part;
Ammonium chloride 6 parts;
1000 parts, water.
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| CN103059874B true CN103059874B (en) | 2015-06-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107312545A (en) * | 2017-05-27 | 2017-11-03 | 中昊(大连)化工研究设计院有限公司 | A kind of shield foaming agent for producing high viscosity foam |
| CN109054842B (en) * | 2018-08-01 | 2020-11-13 | 中铁四局集团有限公司 | Foaming agent for improving muck of earth pressure balance shield and preparation method thereof |
| CN113137237A (en) * | 2021-04-14 | 2021-07-20 | 中交一公局厦门工程有限公司 | Soil body modifier for weakening gushing of shield in water-rich sand layer and preparation and application thereof |
| CN114247742B (en) * | 2021-12-13 | 2023-06-06 | 上海化工研究院有限公司 | Foam composite repair material for treating peculiar smell of polluted soil and treatment method |
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| CN1051193A (en) * | 1989-10-21 | 1991-05-08 | 大庆石油管理局采油工艺研究所 | The whipping agent that preparing foam fracturing liquid is used |
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