CN103059874A - 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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- CN103059874A CN103059874A CN2013100323499A CN201310032349A CN103059874A CN 103059874 A CN103059874 A CN 103059874A CN 2013100323499 A CN2013100323499 A CN 2013100323499A CN 201310032349 A CN201310032349 A CN 201310032349A CN 103059874 A CN103059874 A CN 103059874A
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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 earth pressure balanced shield, EPBS foam modifying agent and preparation method thereof, belong to the material technology field.
Background technology
Earth pressure balanced shield, EPBS is used widely in Construction of Beijing Subway, and has obtained huge economic and social benefit.Yet because the singularity on stratum, Beijing, be that sandy gravel and sandy gravel content are relatively high, the creeping of the soil body is relatively poor, thereby causes easily the Excavation unstability, and pressure tank is inaccessible, pressure tank knot cake, the technical barrier of gushing, often running in the sandy soil layer construction such as cutterhead serious wear.Therefore, in order to guarantee normally carrying out of shielded construction, the soil body must have good creeping, has simultaneously low water-permeable to stop underground water.For this reason, must adopt the creeping technology, namely inject material modified (such as mud, foam etc.) to Excavation, soil pressure storehouse (in case of necessity to worm conveyor), stable to guarantee Excavation, realize the earth pressure balance driving, be conducive to simultaneously reduce mechanical load, reduce land subsidence, improve driving speed.Along with the continuous application of shield structure technology in Construction of Beijing Subway, although accumulated rich experiences and obtained important breakthrough at some technological layer, success, use earth pressure balanced shield, EPBS still to be unable to do without innovation and the rational Application of soil improvement technology economically.
Earth pressure balanced shield, EPBS generally is comprised of whipping agent, suds-stabilizing agent and auxiliary agent with foaming agent.The foaming agent overwhelming majority that the shield structure of understanding at present uses consists of main foaming agent by anion surfactant and nonionogenic tenside are composite, be equipped with suds-stabilizing agent, the product that has also need add the corresponding composite auxiliary agent that can produce synergistic effect with tensio-active agent, expanding material etc. again.All the components mixes forming the foaming agent product by a certain percentage by rights.At present, the foam major part that the Beijing Metro shielded construction adopts is imported product, though the good high cost of effect.Generally, the use of foam modifying agent lacks corresponding theoretical direction and necessary judgement criteria and evaluation method, brings various difficult problems to shielded construction, can be summarized as generally following some:
1) to the essential property of foam modifying agent, with the soil body matching relationship, improved effect and lack relevant theoretical investigation with shielded construction parameters relationship etc., the blindness that causes foam modifying agent in the shielded construction to use: a kind of situation is that modifying agent is selected not mate with formation physical property or in time do not changed during stratigraphic fluctuation to the foam modifying agent, cause the soil improvement effect bad, cause being unearthed difficulty, tool wear is serious, engineering accident occurs; Next is to run into geologic condition when bad, and the parameters without strengthening targetedly modifying agent and injecting causes waste; The third is for saving construction cost in shielded construction, reduce irrelevantly usage quantity, cause the soil improvement effect to reduce, cause the serious problems such as difficulty, tool wear of being unearthed, the reduction of common this improved effect is so that the appearance of the difficulty of being unearthed, certain lag-effect is arranged, and the personnel that easily are operated in construction process ignore.
2) application of foam has represented the developing direction of modifying agent, but mostly relies on import at present, thereby cost is higher, construction cost large, deficiency in economic performance, therefore is necessary very much to carry out the independent research of foaming agent.
3) the at present research of soil improvement technology lacks corresponding codes and standards with application, the determining of the selection of modifying agent kind, grout coordinate ratio, performance perameter and index all relies on test in place or engineering experience to formulate with the selected of control method, injection parameter and rationally control etc., cause the significant wastage of human and material resources and financial resources, even also might cause the Important Project accident.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of earth pressure balanced shield, EPBS foam modifying agent and preparation method thereof, the foam modifying agent improved effect of making by this method is obvious, can satisfy the site operation needs, have the characteristics such as superior performance, reasonable price, matching are wide, safety and environmental protection, solved some problems of the soil improvement technology that exists in the sand-pebble layer shielded construction of Beijing.
Earth pressure balanced shield, EPBS foam modifying agent provided by the present invention is in process for preparation, various system component can not arbitrarily add, must be in a certain order and method, just can configure the foaming agent of stable performance, for achieving the above object, the present invention takes following technical scheme:
A kind of earth pressure balanced shield, EPBS foam modifying agent, described earth pressure balanced shield, EPBS foam modifying agent is made by the raw material of following parts by weight:
Preferably, wherein said earth pressure balanced shield, EPBS foam modifying agent is made by the raw material of following parts by weight:
Preferably, chemical formula wherein said OP-10(triton x-100) is C
34H
62O
11
Preferably, the granularity of wherein said hydroxypropylguar gum is 100 purpose pale yellow powders, and its apparent viscosity is 100mpas.
The present invention also provides the preparation method of above-mentioned earth pressure balanced shield, EPBS foam modifying agent, may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in the water of formula ratio, and stir with the rotating speed of 300-320r/min, make it in water, fully to dissolve (because guar gum is the macromole vegetable jelly, need when in water, dissolving fully to stir and to dissolve, and must be to stir under the high rotating speed to allow its in water, fully dissolve, consider that whipping agent can not high-speed stirring, so at first add guar gum);
(2) after hydroxypropylguar gum fully dissolves, adjustment of rotational speed is 45-50r/min, and the sodium lauryl sulphate of adding formula ratio, stir (when adding sodium lauryl sulphate, must keep agitator speed as far as possible low, if the too high solution of rotating speed bubbles easily);
(3) after being dissolved fully with 1-4 part dehydrated alcohol, the lauryl alcohol of formula ratio and OP-10 add in the lump in step (2) the gained solution, stir (because used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if these two kinds prescriptions directly are unfavorable for both dissolvings in the adding solution, so need in advance it be dissolved fully with a small amount of alcohol);
(4) add at last the ammonium chloride of formula ratio, fully stir with 45-50r/min, make absolute ethanol volatilizes complete, obtain described foam modifying agent.
Earth pressure balanced shield, EPBS 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, and ammonium chloride has good hydrotropy effect to the SDS/OP-10 system, and used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if it is directly added the dissolving that is unfavorable for both in solution, so lauryl alcohol, OP-10 must be under a small amount of alcohol fully after the dissolving, join in the solution together again.
The invention has the advantages that: foam modifying agent provided by the present invention, its improved effect is obvious, can satisfy the site operation needs, have that superior performance, reasonable price, matching are wide, the effect of safety and environmental protection, suitability is strong, by the test of indoor and test in place, can satisfy the requirement of Beijing area sand-pebble layer earth pressure balanced shield, EPBS construction; And this preparation method, easy and simple to handle.
Embodiment
Various active principle of the present invention forms in order to describe in detail, the preparation method, is listed below embodiment and describes in detail.
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
A kind of earth pressure balanced shield, EPBS foam modifying agent, made by the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, available from Chemical Reagent Co., Ltd., Sinopharm Group; The OP-10(triton x-100) is chemical pure, available from Beijing chemical reagents corporation; Lauryl alcohol is available from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is available from Renqiu City swallow Xinghua, Hebei province worker company limited; Ammonium chloride is available from sea, river, Zhuzhou environmental protection Industrial Co., Ltd..
The preparation method of above-mentioned earth pressure balanced shield, EPBS foam modifying agent may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in 1000 parts of water, and stir with the rotating speed of 300r/min, make it fully dissolving 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) after being dissolved fully with 2 parts of dehydrated alcohols, 1 part of lauryl alcohol and 10 parts of OP-10 add in the lump in step (2) the gained solution, stir (because used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if these two kinds prescriptions directly are unfavorable for both dissolvings in the adding solution, so need in advance it be dissolved fully with a small amount of alcohol);
(4) add at last 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; The OP-10(triton x-100) is chemical pure, available from Beijing chemical reagents corporation; Lauryl alcohol is available from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is available from Renqiu City swallow Xinghua, Hebei province worker company limited; Ammonium chloride is available from sea, river, Zhuzhou environmental protection Industrial Co., Ltd..
Embodiment 2
Wherein sodium lauryl sulphate is chemical pure, available from Chemical Reagent Co., Ltd., Sinopharm Group; The OP-10(triton x-100) is chemical pure, available from Beijing chemical reagents corporation; Lauryl alcohol is available from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is available from Renqiu City swallow Xinghua, Hebei province worker company limited; Ammonium chloride is available from sea, river, Zhuzhou environmental protection Industrial Co., Ltd..
The preparation method of above-mentioned earth pressure balanced shield, EPBS foam modifying agent may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in 1000 parts of water, and stir with the rotating speed of 300r/min, make it fully dissolving 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) after being dissolved fully with 2 parts of dehydrated alcohols, 1.5 parts of lauryl alcohols and 15 parts of OP-10 add in the lump in step (2) the gained solution, stir (because used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if these two kinds prescriptions directly are unfavorable for both dissolvings in the adding solution, so need in advance it be dissolved fully with a small amount of alcohol);
(4) add at last 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 earth pressure balanced shield, EPBS foam modifying agent, made by the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, available from Chemical Reagent Co., Ltd., Sinopharm Group; The OP-10(triton x-100) is chemical pure, available from Beijing chemical reagents corporation; Lauryl alcohol is available from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is available from Renqiu City swallow Xinghua, Hebei province worker company limited; Ammonium chloride is available from sea, river, Zhuzhou environmental protection Industrial Co., Ltd..
The preparation method of above-mentioned earth pressure balanced shield, EPBS foam modifying agent may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in 1000 parts of water, and stir with the rotating speed of 300r/min, make it fully dissolving 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) after being dissolved fully with 2 parts of dehydrated alcohols, 1.2 parts of lauryl alcohols and 15 parts of OP-10 add in the lump in step (2) the gained solution, stir (because used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if these two kinds prescriptions directly are unfavorable for both dissolvings in the adding solution, so need in advance it be dissolved fully with a small amount of alcohol);
(4) add at last 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 earth pressure balanced shield, EPBS foam modifying agent, made by the raw material of following parts by weight:
Wherein sodium lauryl sulphate is chemical pure, available from Chemical Reagent Co., Ltd., Sinopharm Group; The OP-10(triton x-100) is chemical pure, available from Beijing chemical reagents corporation; Lauryl alcohol is available from Chemical Reagent Co., Ltd., Sinopharm Group; Hydroxypropylguar gum is available from Renqiu City swallow Xinghua, Hebei province worker company limited; Ammonium chloride is available from sea, river, Zhuzhou environmental protection Industrial Co., Ltd..
The preparation method of above-mentioned earth pressure balanced shield, EPBS foam modifying agent may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in 1000 parts of water, and stir with the rotating speed of 300r/min, make it fully dissolving 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) after being dissolved fully with 2 parts of dehydrated alcohols, 1 part of lauryl alcohol and 7.5 parts of OP-10 add in the lump in step (2) the gained solution, stir (because used lauryl alcohol becomes solid at normal temperatures, OP-10 is liquid, if these two kinds prescriptions directly are unfavorable for both dissolvings in the adding solution, so need in advance it be dissolved fully with a small amount of alcohol);
(4) add at last 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 called again " expansion ratio ", refers to bubble volume that the foaming agent solution of certain volume sends and the ratio of foaming agent solution volume, i.e. the volume that bubbles up of every volume foaming agent solution.Following formula is seen in its definition:
In the formula: ER-frothing percentage; V
f-bubble volume; V
l-foaming agent solution volume.
The measurement of frothing percentage is to realize that by the measuring cup with scale testing sequence is as follows:
The foam modifying agent that configures is divided into 5 groups, every group 3 parts, first group, second group, the 3rd group, the 4th group test that is used for respectively inventive embodiment 1, embodiment 2, embodiment 3, embodiment 4, the 5th group is domestic foam modifying agent (available from Beijing tunnel construction technology company limited of suitable Futong), and the difference label;
Foam device is regulated in the foaming agent solution foaming that 1. will prepare in advance with indoor foam device in the foaming process, until obtain desired bubble, and make this state keep stable;
2. after foam device keeps stablizing foamed state, observe the scale that holds the foaming agent solution beaker, selected start index begins to add in measuring cup and respectively organizes the foam modifying agent, record beaker scale this moment after foam is filled measuring cup.
3. with each group test-results data preparation, average.
Test-results is as shown in table 1.
The frothing percentage of table 1 foaming agent relatively
As can be seen from Table 1, the frothing percentage of the earth pressure balanced shield, EPBS foam modifying agent of the embodiment of the invention 1 ~ 4 is 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 can be weighed by the foam defoamed ratio, and defoamed ratio is one of important parameter that characterizes bubble stability, and following formula is seen in its definition:
In the 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, defoamed ratio is " transformation period " that 50% corresponding time was called 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 relatively
| ? | 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 earth pressure balanced shield, EPBS foam modifying agent of the embodiment of the invention 1 ~ 4 is higher than domestic foam modifying agent, illustrates that the improved effect of modifying agent of the present invention is good.
The above is embodiments of the invention only, should be understood that; for the those of ordinary skill in the present technique; under the prerequisite that does not break away from core technology feature 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 (5)
1. an earth pressure balanced shield, EPBS foam modifying agent is characterized in that, described earth pressure balanced shield, EPBS foam modifying agent is made by 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 in water.
2. earth pressure balanced shield, EPBS foam modifying agent as claimed in claim 1 is characterized in that, described earth pressure balanced shield, EPBS foam modifying agent is made by the raw material of following parts by weight:
15 parts of sodium lauryl sulphate;
10 parts of OP-10;
1 part of lauryl alcohol;
0.6 part of hydroxypropylguar gum;
6 parts of ammonium chlorides;
1000 parts in water.
3. earth pressure balanced shield, EPBS foam modifying agent as claimed in claim 1 or 2 is characterized in that, the chemical formula of described OP-10 is C
34H
62O
11
4. earth pressure balanced shield, EPBS foam modifying agent as claimed in claim 1 or 2 is characterized in that, the granularity of described hydroxypropylguar gum is 100 purpose pale yellow powders, and its apparent viscosity is 100mpas.
5. such as the preparation method of the arbitrary described earth pressure balanced shield, EPBS foam modifying agent of claim 1-4, it is characterized in that, may further comprise the steps:
(1) at first adds the hydroxypropylguar gum of formula ratio in the water of formula ratio, and stir with the rotating speed of 300-320r/min, make it fully dissolving 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) the gained solution after the lauryl alcohol of formula ratio and OP-10 are dissolved fully with 1-4 part dehydrated alcohol, stir;
(4) add at last the ammonium chloride of formula ratio, fully stir with 45-50r/min, it is complete that dehydrated alcohol is fully volatilized, and obtains described foam modifying agent.
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| CN201310032349.9A CN103059874B (en) | 2013-01-28 | 2013-01-28 | Soil pressure balance shield foam modifying agent and preparation method thereof |
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| CN201310032349.9A CN103059874B (en) | 2013-01-28 | 2013-01-28 | Soil pressure balance shield foam modifying agent and preparation method thereof |
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| CN103059874B CN103059874B (en) | 2015-06-03 |
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Cited By (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 |
| CN109054842A (en) * | 2018-08-01 | 2018-12-21 | 中铁四局集团有限公司 | A kind of earth pressure balanced shield, EPBS sediment improvement foaming agent 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 |
| CN114247742A (en) * | 2021-12-13 | 2022-03-29 | 上海化工研究院有限公司 | Foam composite repairing material for treating peculiar smell of polluted soil and treating method |
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Cited By (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 |
| CN109054842A (en) * | 2018-08-01 | 2018-12-21 | 中铁四局集团有限公司 | A kind of earth pressure balanced shield, EPBS sediment improvement foaming agent 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 |
| CN114247742A (en) * | 2021-12-13 | 2022-03-29 | 上海化工研究院有限公司 | Foam composite repairing material for treating peculiar smell of polluted soil and treating method |
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| CN103059874B (en) | 2015-06-03 |
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