CN112962577A - Water-carrying grouting plugging structure and plugging method for large-flow leakage stratum - Google Patents
Water-carrying grouting plugging structure and plugging method for large-flow leakage stratum Download PDFInfo
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- CN112962577A CN112962577A CN202110537101.2A CN202110537101A CN112962577A CN 112962577 A CN112962577 A CN 112962577A CN 202110537101 A CN202110537101 A CN 202110537101A CN 112962577 A CN112962577 A CN 112962577A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of drilling of soil layers or rocks, and discloses a water-carrying grouting plugging structure and a plugging method for a large-flow leakage stratum, which comprise a porous resin consolidation body and a grouting consolidation body, wherein the porous resin consolidation body and the grouting consolidation body are plugged in stratum pores near a leakage port; the porous resin consolidation body is internally wrapped with a leakage object, and the grouting consolidation body and the porous resin consolidation body are mutually consolidated into a whole. In the invention, the porous resin consolidation body is formed in the formation pore by the water-injected epoxy resin liquid, so that the large formation pore is changed into a small pore, the wall effect is obviously improved, the flowing resistance of fluid in the formation pore is increased, the flowing speed of formation pore water is reduced, and the subsequently injected slurry is not easy to flush out; meanwhile, the water in the pores of the stratum is separated, so that the subsequently injected slurry cannot be quickly diluted; the slurry also adheres more easily to the cell walls in the porous resin consolidated body.
Description
Technical Field
The invention relates to the technical field of drilling of soil layers or rocks, in particular to a water-carrying grouting plugging structure and a plugging method for a large-flow leakage stratum.
Background
Construction in water-bearing stratum is a difficulty which cannot be avoided by underground construction, and accidents such as piping, soil flowing, collapse and the like can be caused if the construction is not well handled, so that construction safety and engineering progress are seriously influenced.
Grouting and water plugging are carried out along with underground construction in a water-containing stratum all the time, pre-grouting and water plugging are needed before excavation, some water leakage points with large flow are needed to be plugged in the excavation process to control accumulated water, and post-grouting and water plugging are needed after excavation is finished.
However, when the construction is carried out in a leakage stratum, the grouting and water plugging are difficult. The lost stratum is divided into three types of pore stratum, fracture stratum and karst stratum, which are generally provided with large pores or cracks, the water contained in the stratum is large and continuous, the flow is rapid, and the injected slurry can be quickly diluted and quickly dispersed under the drive of the rapidly flowing water body. The leakage stratum is quite widely distributed in China, such as a alluvial fan plain like Chengdu plain and Beijing small plain, and comprises a large number of pore stratums represented by sandy gravel stratums; in the Yunobu and Guangxi areas, karst strata are connected into slices; the southeast coastal region is located on the Pacific seismic belt, and a large number of fractured stratums exist.
The foam rubber is also a common building plugging material, polyurethane monomer slurry is sprayed out through propane to form foam, and the foam is cured by contacting with water vapor to form closed-cell foam plastic. However, the foaming glue cannot be used for plugging a leakage opening with large water flow, and in practical use, the foaming glue is cured extremely fast after being injected into water to form closed-cell foam plastic particles which cannot stay in a stratum and can be flushed out rapidly under the drive of water flow.
Disclosure of Invention
The invention provides a water-carrying grouting plugging structure and a plugging method for a large-flow leakage stratum.
The technical problem to be solved is that: when grouting and water plugging are carried out in a stratum with larger pores, the injected slurry can be quickly diluted and can be quickly dispersed under the drive of a quickly flowing water body, so that the water plugging effect is poor or even the water plugging cannot be carried out.
In order to solve the technical problems, the invention adopts the following technical scheme: a water-carrying grouting plugging structure for a large-flow seepage stratum is used for plugging seepage ports of an area with large seepage water amount in the stratum; comprises a porous resin consolidation body and a grouting consolidation body which are plugged in the formation pores near the leakage port;
the porous resin solidification body is internally wrapped with seepage, and the seepage comprises water and particles carried in the water.
Further, the porous resin solidification body is epoxy resin containing seepage in pores.
Furthermore, the pores in the porous resin solidification body are open pores, and the grouting solidification body and the porous resin solidification body are mutually cemented into a whole.
A water-carrying grouting plugging method for a large-flow leakage stratum adopts the water-carrying grouting plugging structure for the large-flow leakage stratum to plug a leakage hole, and comprises the following steps:
the method comprises the following steps: separately injecting water-based epoxy resin liquid and a water-soluble curing agent into the stratum near the seepage port, mixing and curing the epoxy resin liquid and the water-soluble curing agent in the pores of the stratum to form a porous resin consolidation body wrapped with seepage;
step two: and grouting in the stratum near the leakage port to form a grouting consolidation body when the leakage amount is reduced, thereby blocking the leakage port.
Further, in the first step, the dispersion speed of the aqueous epoxy resin liquid and the curing agent in the leakage is increased in a foaming mode while the aqueous epoxy resin liquid and the curing agent are injected.
Further, in the step one, foaming is carried out by adopting one of the following modes:
mode 1: blowing compressed air while injecting the waterborne epoxy resin liquid and the curing agent;
mode 2: the water-based epoxy resin liquid and/or the curing agent are doped with chemically compatible liquefied hydrocarbon, and the molecule of the liquefied hydrocarbon contains 3-5 carbon atoms;
mode 3: the aqueous epoxy resin liquid and/or the curing agent is doped with a chemically compatible chemical foaming agent.
Further, the curing agent is an organic acid or anhydride curing agent, the foaming is carried out in the step one by adopting a mode 3, and the chemical foaming agent is ammonium bicarbonate.
Further, in the first step, the aqueous epoxy resin solution and/or the curing agent is preheated before injection.
Further, the curing agent is a fatty amine curing agent.
Further, the slurry injected in the second step is double-slurry doped with coarse aggregate.
Compared with the prior art, the water-carrying grouting plugging structure and the plugging method for the large-flow leakage stratum have the following beneficial effects:
in the invention, the porous resin consolidation body is formed in the formation pore by the water-injected epoxy resin liquid, so that the large formation pore is changed into a small pore, the wall effect is obviously improved, the flowing resistance of fluid in the formation pore is increased, the flowing speed of formation pore water is reduced, and the subsequently injected slurry is not easy to flush out; meanwhile, the water in the pores of the stratum is separated, so that the subsequently injected slurry cannot be quickly diluted; the slurry is also more easily attached to the pore walls in the porous resin consolidated body;
according to the invention, the waterborne epoxy resin is dispersed in water and then cured to form a complex shape matched with the formation pores, and the complex shape cannot shrink into particles or strips under the action of surface tension like water-insoluble foaming glue, so that a porous resin solidification body formed after curing is not easy to wash away;
according to the invention, when the waterborne epoxy resin is cured, water and particles in the water are wrapped, so that not only is the self weight increased and the particles are not easy to flush away, but also the particles lead the surface of a porous resin solidified body to be rough, and the porous resin solidified body can be quickly attached to the formation pore walls again even if the porous resin solidified body falls off from the formation pore walls;
in the invention, the holes in the porous resin solidification body are open holes, and water can enter the inside, thereby preventing the porous resin solidification body from bearing all impact of water flow and ensuring that the porous resin solidification body is not easy to flush away; the double-liquid slurry injected subsequently can also enter the porous resin solidification body and is tightly combined with the porous resin solidification body;
in the invention, the waterborne epoxy resin liquid is foamed while being injected, and the bubbles not only ensure that the waterborne epoxy resin liquid is uniformly dispersed and uniformly mixed with the curing agent, but also increase the flow resistance of water, so that the waterborne epoxy resin liquid is not easy to be excessively diluted;
in the invention, after the porous resin consolidation body is formed, the double-liquid slurry doped with the coarse aggregate is injected, the double-liquid slurry is solidified quickly, the grouting consolidation body can be quickly formed by taking the porous resin consolidation body and the stratum pore walls as attachment points, the coarse aggregate is used as a filler, the double-liquid slurry is not easy to disperse, and the grouting consolidation body is tightly combined with the porous resin consolidation body as a framework.
Drawings
Fig. 1 is a flow chart of a water-carrying grouting plugging method for a large-flow leakage stratum according to the invention.
Detailed Description
A water-carrying grouting plugging structure for a large-flow seepage stratum is used for plugging seepage ports of an area with large seepage water amount in the stratum; comprises a porous resin consolidation body and a grouting consolidation body which are plugged in the formation pores near the leakage port; the porous resin consolidation body is wrapped with seepage, and the seepage comprises water and particles carried in the water.
The porous resin consolidated body is an epoxy resin containing a leak in the pores. Note that the requirements for epoxy resin in the invention are completely different from the requirements for epoxy resin in coatings, only the epoxy resin needs to delay water flow and wrap some sand, the requirement can be met only by a very low curing degree, the epoxy resin does not need to be cured to a wear-resistant degree in a short time, the existing epoxy resin on the market can generally meet the requirement, and the epoxy resin which is cured rapidly does not need to be specially selected.
The holes in the porous resin solidification body are open holes, and the grouting solidification body and the porous resin solidification body are mutually cemented into a whole. In use, the aqueous epoxy resin liquid is found to flocculate to form floccules when being solidified in water, which is quite similar to alum purified water, sand and soil in the water are wrapped by the floccules, and then the floccules are continuously developed and connected into a whole to form a loose porous material, and pores can not be closed.
As shown in fig. 1, a water-carrying grouting plugging method for a large-flow leaking stratum adopts the above water-carrying grouting plugging structure for a large-flow leaking stratum to plug a leakage hole after a water leakage point is found, and comprises the following steps:
the method comprises the following steps: separately injecting water-based epoxy resin liquid and a water-soluble curing agent into the stratum near the seepage port, mixing and curing the epoxy resin liquid and the water-soluble curing agent in the pores of the stratum to form a porous resin consolidation body wrapped with seepage;
the water-injected epoxy resin liquid and the water-soluble curing agent may be pumped by a dedicated gear pump, or may be injected by a double pipe using a grouting apparatus on the construction site if not, but the apparatus and the pipe are cleaned after the injection. However, in any equipment, the aqueous epoxy resin solution and the curing agent cannot be mixed and injected, and the mixture must be injected separately. Although many epoxy resins have long cure times, cure times refer to times that have a certain strength, and in fact, epoxy resins mixed with curing agents begin to react and cure enough to damage equipment, if not completely cured.
Step two: and grouting in the stratum near the leakage port to form a grouting consolidation body when the leakage amount is reduced, thereby blocking the leakage port. After grouting, whether the grouting is compact or not is judged by detecting grouting pressure and flow.
In the first step, the dispersion speed of the waterborne epoxy resin liquid and the curing agent in the leakage is accelerated in a foaming mode while the waterborne epoxy resin liquid and the curing agent are injected.
In the first step, the foaming method is not limited, and one of the following methods can be adopted for foaming:
mode 1: blowing compressed air while injecting the waterborne epoxy resin liquid and the curing agent; the method is a common method for concrete foaming, belongs to a foaming mode by adopting a surfactant, and can be used for directly bubbling because the water-based epoxy resin liquid contains the surfactant. Of course, if the surfactant in the aqueous epoxy resin solution is not effective, it may be supplemented additionally, such as the conventional magnesite cement foaming agent. The supplemental surfactant may be incorporated into the aqueous epoxy resin solution and/or curing agent prior to injection, as long as it does not react upon mixing, or may be injected separately.
Mode 2: the water-based epoxy resin liquid and/or the curing agent are doped with chemically compatible liquefied hydrocarbon, and the molecule of the liquefied hydrocarbon contains 3-5 carbon atoms; chemically compatible, meaning that no significant chemical reaction occurs after incorporation, nor does it cause significant delamination;
this is another type of foaming means by which various gels and hair cosmetics are foamed. Most of the curing agent is completely soluble and non-reactive with the liquefied hydrocarbon. The liquefied hydrocarbon can be liquefied petroleum gas on the market, and n-butane can be used if conditions are met, the boiling point of the n-butane is-0.5 ℃, the liquefied hydrocarbon can be gasified in water, and meanwhile, the liquefied hydrocarbon cannot volatilize too fast. Note that the liquefied hydrocarbon is injected into the formation immediately after being mixed, and the adopted pump is a plunger pump, a screw pump or a gear pump, and a centrifugal pump cannot be used, otherwise, gas binding is easily caused.
Mode 3: the aqueous epoxy resin liquid and/or the curing agent is doped with a chemically compatible chemical foaming agent. The chemical blowing agent is preferably water-soluble to disperse uniformly.
In this embodiment, the curing agent is an organic acid or acid anhydride curing agent, the foaming is performed in step one by using the method 3, and the chemical foaming agent is ammonium bicarbonate and is doped in the aqueous epoxy resin solution before use. The organic acid or anhydride is in excess to react with the ammonium bicarbonate to produce carbon dioxide bubbles centered on the emulsion droplets.
It is noted that ammonium bicarbonate has a weak demulsifying effect, so that the ammonium bicarbonate must be doped in the aqueous epoxy resin liquid before use, and the ammonium bicarbonate can not be stored for a long time after being mixed. Sodium bicarbonate or soda ash can not be used for replacing ammonium bicarbonate, and the demulsification effect of the sodium bicarbonate or soda ash on the aqueous epoxy resin liquid is quite obvious, so that the layering can be caused, and the dispersion of the aqueous epoxy resin liquid is influenced. Furthermore, the solubility of sodium bicarbonate is much lower, which is not conducive to incorporation.
Since the curing of the organic acid or acid anhydride curing agent is slow, in the first step, the aqueous epoxy resin solution and/or the curing agent needs to be preheated before injection to be cured quickly. Of course, if the curing agent is a type that cures quickly such as a fatty amine-based curing agent, preheating is not necessary.
And the slurry injected in the second step is double-slurry doped with coarse aggregate. Coarse aggregate such as coarse sand is additionally added on the basis of the common water glass-calcium chloride double-liquid slurry or water glass-cement slurry. In general stratum, the slurry doped with coarse aggregate is difficult to inject into stratum, but because the large-flow leakage hole is positioned in the stratum, the problem of difficult grouting does not exist, the coarse aggregate not only makes the double-liquid slurry difficult to disperse, but also makes the grouting consolidation body and the porous resin consolidation body as the framework tightly combined.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A water-carrying grouting plugging structure for a large-flow seepage stratum is used for plugging seepage ports of an area with large seepage water amount in the stratum; the method is characterized in that: comprises a porous resin consolidation body and a grouting consolidation body which are plugged in the formation pores near the leakage port;
the porous resin solidification body is internally wrapped with seepage, and the seepage comprises water and particles carried in the water.
2. The water-bearing grouting plugging structure for the high-flow leaking stratum according to claim 1, characterized in that: the porous resin solidification body is epoxy resin with seepage in pores.
3. The water-bearing grouting plugging structure for the high-flow leaking stratum according to claim 2, characterized in that: the holes in the porous resin solidification body are open holes, and the grouting solidification body and the porous resin solidification body are mutually cemented into a whole.
4. A water-carrying grouting plugging method for a large-flow leakage stratum is characterized by comprising the following steps: the water-carrying grouting plugging structure for the high-flow leakage stratum according to claim 3 is adopted to plug the leakage hole, and comprises the following steps:
the method comprises the following steps: separately injecting water-based epoxy resin liquid and a water-soluble curing agent into the stratum near the seepage port, mixing and curing the epoxy resin liquid and the water-soluble curing agent in the pores of the stratum to form a porous resin consolidation body wrapped with seepage;
step two: and grouting in the stratum near the leakage port to form a grouting consolidation body when the leakage amount is reduced, thereby blocking the leakage port.
5. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 4, characterized in that: in the first step, the dispersion speed of the waterborne epoxy resin liquid and the curing agent in the leakage is accelerated in a foaming mode while the waterborne epoxy resin liquid and the curing agent are injected.
6. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 5, characterized in that: in the first step, foaming is carried out by adopting one of the following modes:
mode 1: blowing compressed air while injecting the waterborne epoxy resin liquid and the curing agent;
mode 2: the water-based epoxy resin liquid and/or the curing agent are doped with chemically compatible liquefied hydrocarbon, and the molecule of the liquefied hydrocarbon contains 3-5 carbon atoms;
mode 3: the aqueous epoxy resin liquid and/or the curing agent is doped with a chemically compatible chemical foaming agent.
7. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 6, characterized in that: the curing agent is an organic acid or anhydride curing agent, the foaming is carried out in the step one by adopting a mode 3, and the chemical foaming agent is ammonium bicarbonate.
8. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 4, characterized in that: in the first step, the aqueous epoxy resin solution and/or the curing agent is preheated before injection.
9. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 4, characterized in that: the curing agent is aliphatic amine curing agent.
10. The water-carrying grouting plugging method for the high-flow leakage stratum according to claim 4, characterized in that: and the slurry injected in the second step is double-slurry doped with coarse aggregate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115948038A (en) * | 2021-10-09 | 2023-04-11 | 中国石油化工股份有限公司 | Low-shrinkage high-strength liquid cross-linking type plugging material and preparation method and application thereof |
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| CN104650790A (en) * | 2015-02-15 | 2015-05-27 | 上海颖川加固工程技术有限公司 | Grouting material for reinforcing and strengthening concrete used underwater |
| CN105442862A (en) * | 2015-11-19 | 2016-03-30 | 江苏鼎达建筑新技术有限公司 | Method for leakage water plugging, strengthening and repairing against concrete crack |
| CN109535306A (en) * | 2018-11-19 | 2019-03-29 | 山东大学 | A kind of expandable polymeric injecting paste material and preparation method for the prominent Water outburst treatment of high-pressure high-flow karst |
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- 2021-05-18 CN CN202110537101.2A patent/CN112962577A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6572927B1 (en) * | 1998-06-29 | 2003-06-03 | Gerd Pleyers | Method for sealing porous building materials and building components |
| CN103912003A (en) * | 2013-12-31 | 2014-07-09 | 中国人民解放军63653部队 | Method for conveniently and rapidly blocking stratum flowing water and pores |
| CN104650790A (en) * | 2015-02-15 | 2015-05-27 | 上海颖川加固工程技术有限公司 | Grouting material for reinforcing and strengthening concrete used underwater |
| CN105442862A (en) * | 2015-11-19 | 2016-03-30 | 江苏鼎达建筑新技术有限公司 | Method for leakage water plugging, strengthening and repairing against concrete crack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115948038A (en) * | 2021-10-09 | 2023-04-11 | 中国石油化工股份有限公司 | Low-shrinkage high-strength liquid cross-linking type plugging material and preparation method and application thereof |
| CN115948038B (en) * | 2021-10-09 | 2024-04-16 | 中国石油化工股份有限公司 | Low-shrinkage high-strength liquid cross-linking plugging material and preparation method and application thereof |
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