CN114716214B - Water burst grouting material for deep-buried high-pressure water-rich tunnel and water plugging and reinforcing application method thereof - Google Patents
Water burst grouting material for deep-buried high-pressure water-rich tunnel and water plugging and reinforcing application method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 title claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 26
- 239000011435 rock Substances 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 10
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims abstract description 8
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 8
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 239000000600 sorbitol Substances 0.000 claims abstract description 8
- 239000000811 xylitol Substances 0.000 claims abstract description 8
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 claims abstract description 8
- 229960002675 xylitol Drugs 0.000 claims abstract description 8
- 235000010447 xylitol Nutrition 0.000 claims abstract description 8
- 239000004970 Chain extender Substances 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 5
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims abstract description 3
- 238000005553 drilling Methods 0.000 claims description 23
- 230000002787 reinforcement Effects 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 12
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 11
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 11
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 8
- 238000001291 vacuum drying Methods 0.000 claims description 8
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000004886 process control Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- HEBRGEBJCIKEKX-UHFFFAOYSA-M sodium;2-hexadecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HEBRGEBJCIKEKX-UHFFFAOYSA-M 0.000 claims description 3
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 239000012948 isocyanate Substances 0.000 abstract 1
- 150000002513 isocyanates Chemical class 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C04B2111/20—Resistance against chemical, physical or biological attack
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- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention belongs to the technical field of tunnel grouting, and particularly discloses a water burst grouting material for a deep-buried high-pressure water-rich tunnel and a water plugging and reinforcing application method. The water burst grouting material for the deeply buried high-pressure water-rich tunnel mainly comprises fast hardening sulphoaluminate cement, sorbitol, xylitol, isocyanate, a catalyst, a chain extender, a defoaming agent and the like. The water blocking and reinforcing application method is a method for blocking tunnel water inrush and reinforcing tunnel surrounding rocks by injecting water inrush grouting materials of a deep-buried high-pressure water-rich tunnel into the tunnel face through high pressure by full-face curtain grouting, advanced small conduit grouting or advanced anchor rod grouting under the action of a single slurry pump or double slurry pumps. The method can obtain a grouting material with ultrahigh strength, ultralow water permeability coefficient and excellent durability, can ensure long-term safe and stable operation of the deep-buried high-pressure water-rich tunnel, and prolongs the service life of the deep-buried high-pressure water-rich tunnel.
Description
Technical Field
The invention belongs to the technical field of tunnel grouting, and particularly relates to a water burst grouting material for a deep-buried high-pressure water-rich tunnel and a water plugging and reinforcing application method thereof.
Background
With the continuous development of social economy, the infrastructure construction level of China is continuously improved, and the tunnel construction gradually advances to the characteristics of large burial depth, high water pressure, long distance, large diameter and the like. The Shanxi province is located in the west of Taihang mountain, the yellow river is east, and the Shanxi province is rich in the names of exterior and interior mountains, and belongs to the loess plateau area and the tunnel construction problem in the west of North China. The problems of water gushing, water inrush and mud inrush caused by loess collapsibility, unknown water-bearing bodies in tunnels and the like are more serious, and how to effectively avoid and treat the water diseases of the deeply buried high-pressure water-rich tunnels is an important scientific problem in tunnel construction. Therefore, the method has important significance for researching the water burst grouting material of the deep-buried high-pressure water-rich tunnel and the water plugging reinforcement application method thereof.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a deep-buried high-pressure water-rich tunnel water burst grouting material with ultrahigh strength, ultralow water permeability coefficient and excellent durability and a water blocking and reinforcing application method capable of quickly repairing water burst of the deep-buried high-pressure water-rich tunnel.
The water burst grouting material for the deep-buried high-pressure water-rich tunnel comprises 20-40wt% of quick-hardening sulphoaluminate cement, 10-20wt% of sorbitol, 10-15wt% of xylitol, 20wt% of diphenylmethane diisocyanate (MDI), 10-20wt% of Hexamethylene Diisocyanate (HDI), 1.0wt% of catalyst, 2wt% of chain extender and 3wt% of defoaming agent.
The catalyst is one or more of triethanolamine, sodium hexadecylbenzene sulfonate and stannous octoate.
The chain extender is one or more of 1, 4-butanediol, pentanol and hexanol.
The defoaming agent is polymethyl triethoxy silane.
The preparation method of the water burst grouting material for the deep-buried high-pressure water-rich tunnel comprises the following steps: stirring the fast hardening sulphoaluminate cement, sorbitol, xylitol, catalyst, chain extender and defoamer for 15min at 300-500rmp, and uniformly mixing to obtain a component A; carrying out vacuum drying on diphenylmethane diisocyanate and hexamethylene diisocyanate at 100 ℃ for 2h to obtain a component B; and (3) putting the component A and the component B into a storage barrel, and stirring for 10-15s to obtain the water burst grouting material for the deep-buried high-pressure water-rich tunnel.
The application method of the water-inrush grouting material for the deep-buried high-pressure water-rich tunnel for water shutoff and reinforcement comprises the following steps:
(1) Acquiring tunnel geological survey design data, and supplementing exploration data according to the condition of water inrush and mud inrush disasters, wherein the supplementing exploration data comprises hydrogeological test data, geophysical exploration data and drilling coring data;
(2) Exploring disaster-causing water-containing bodies, fault rock soil bodies, engineering geological characteristics and geological space forms of the fault rock soil bodies;
(3) Judging the surrounding rock injectivity, the surrounding rock grade, the thickness of the surrounding rock reinforcing ring, the runoff characteristic and the drilling difficulty level according to the data;
(4) Providing a water and mud outburst disaster support strengthening mode and implementation;
(5) The deep energy-releasing pressure-releasing drilling construction is used for grouting process control and grouting safety control, grouting information such as grouting amount, grouting pressure and grouting speed is fed back, and stability, water burst and mud burst amount and water pressure are monitored in a tracking mode in the whole process;
(6) And (4) performing grouting parameter adjustment and drilling dynamic adjustment according to the grouting control step feedback information, performing grouting, and finally performing grouting water plugging reinforcement effect evaluation.
And (6) pumping and grouting at the pressure of 5-20MPa by using a single slurry pump or a double slurry pump, injecting into the tunnel face and the surrounding rock cracks, and finishing grouting when the pressure reaches 10-20 MPa.
And (4) the grouting mode in the step (6) is shallow curtain grouting, full-section curtain grouting, advanced small conduit grouting or advanced anchor rod grouting.
The evaluation of the grouting water plugging and reinforcing effect adopts a grading method, the grade of the tunnel after grouting is more than 90, and the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel are met.
The grouting water plugging and reinforcing effect evaluation adopts a drilling inspection method, the compressive strength of a solidified core sample is more than 20.0MPa, and the water permeability coefficient is not less than 10 -7 And m/s, meeting the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel.
The water burst grouting material for the deep-buried high-pressure water-rich tunnel and the water plugging and reinforcing application method thereof have the characteristics of ultrahigh strength, ultralow water permeability coefficient, excellent durability, greenness, low carbon and the like. The method can quickly block the water burst of the deep-buried high-pressure water-rich tunnel, reinforce the surrounding rock of the tunnel, fully improve the treatment capacity of water burst disasters of the tunnel under construction and the operating tunnel, ensure that the deep-buried high-pressure water-rich tunnel can be safely and stably operated for a long time, prolong the service life of the deep-buried high-pressure water-rich tunnel and generate remarkable economic and social benefits.
Detailed Description
Example 1:
(1) Acquiring tunnel geological survey design data, and supplementing exploration data according to the condition of water inrush and mud inrush disasters, wherein the supplementing exploration data comprises hydrogeological test data, geophysical exploration data and drilling coring data;
(2) Exploring disaster-causing water-containing bodies, fault rock soil bodies, engineering geological characteristics and geological space forms of the fault rock soil bodies;
(3) Judging the surrounding rock injectivity, the surrounding rock grade, the thickness of the surrounding rock reinforcing ring, the runoff characteristic and the drilling difficulty level according to the data;
(4) Providing a water and mud outburst disaster support strengthening mode and implementation;
(5) The deep energy-releasing pressure-releasing drilling construction is used for grouting process control and grouting safety control, grouting information such as grouting amount, grouting pressure and grouting speed is fed back, and stability, water burst and mud burst amount and water pressure are monitored in a tracking mode in the whole process;
(6) And (4) performing grouting parameter adjustment and drilling dynamic adjustment according to the grouting control step feedback information, performing grouting by using a water burst grouting material of the deeply-buried high-pressure water-rich tunnel, and finally performing grouting water plugging reinforcement effect evaluation.
The preparation method of the water burst grouting material for the deep-buried high-pressure water-rich tunnel used in the step (6) comprises the following steps: uniformly stirring 20% of rapid hardening sulphoaluminate cement, 20% of sorbitol, 15% of xylitol, 1.0% of sodium hexadecylbenzene sulfonate, 2% of 1, 4-butanediol and 3% of polymethyl triethoxysilane at 500rmp for 15min, and uniformly mixing to obtain a component A; then, 20% of diphenylmethane diisocyanate (MDI) and 19% of Hexamethylene Diisocyanate (HDI) are subjected to vacuum drying for 2 hours in a vacuum drying oven at the temperature of 100 ℃ to obtain a component B; and (3) putting the component A and the component B into a storage vat, stirring for 15s, pumping by using a double-slurry pump at the pressure of 10MPa, injecting into the tunnel face and the surrounding rock cracks, and finishing grouting when the pressure reaches 15 MPa.
When the grouting effect is tested by a grading method, the score of the grouted tunnel is 92, and the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel are met.
The basic properties of the water burst grouting material for the deep-buried high-pressure water-rich tunnel are shown in Table 1, wherein the density of the grouting material is 1.25g/cm 3 Compressive strength of 25MPa and water permeability coefficient of 1.5 x 10 -8 m/s, meets the design requirement.
TABLE 1 basic Properties of water-burst grouting material for deep-buried high-pressure water-rich tunnel
Example 2:
(1) Acquiring tunnel geological survey design data, supplementing exploration data according to the condition of water burst and mud burst disasters, wherein the supplementing exploration data comprises hydrogeological test data, geophysical exploration data and drilling coring data;
(2) Exploring disaster-causing water-containing bodies, fault rock soil bodies, engineering geological characteristics and geological space forms of the fault rock soil bodies;
(3) Judging the surrounding rock injectivity, the surrounding rock grade, the thickness of the surrounding rock reinforcing ring, the runoff characteristic and the drilling difficulty level according to the data;
(4) Providing a water and mud outburst disaster support strengthening mode and implementation;
(5) The deep energy-releasing pressure-releasing drilling construction is used for grouting process control and grouting safety control, grouting information such as grouting amount, grouting pressure and grouting speed is fed back, and stability, water burst and mud burst amount and water pressure are monitored in a tracking mode in the whole process;
(6) And (4) performing grouting parameter adjustment and drilling dynamic adjustment according to the grouting control step feedback information, performing grouting by using the water burst grouting material of the deeply buried high-pressure water-rich tunnel, and finally performing grouting water plugging reinforcement effect evaluation.
The preparation method of the water burst grouting material for the deep-buried high-pressure water-rich tunnel used in the step (6) comprises the following steps: uniformly stirring 40% of rapid hardening sulphoaluminate cement, 10% of sorbitol, 10% of xylitol, 1.0% of triethanolamine, 2% of amyl alcohol and 3% of polymethyltriethoxysilane for 15min at 500rmp, and uniformly mixing to obtain a component A; then, 20% of diphenylmethane diisocyanate (MDI) and 14% of Hexamethylene Diisocyanate (HDI) are subjected to vacuum drying for 2 hours in a vacuum drying oven at the temperature of 100 ℃ to obtain a component B; and (3) putting the component A and the component B into a storage barrel, stirring for 15s, pumping by a double-slurry pump at the pressure of 5MPa, injecting into the tunnel face and the surrounding rock cracks, and finishing grouting when the pressure reaches 15 MPa.
When the grouting effect is tested by a grading method, the score of the grouted tunnel is 95, and the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel are met.
The basic properties of the water burst grouting material for the deep-buried high-pressure water-rich tunnel are shown in Table 2, wherein the density of the grouting material is 1.48g/cm 3 The compressive strength is 32MPa, and the water permeability coefficient is 1.1 x 10 -8 m/s, meets the design requirement.
TABLE 2 basic performance of water gushing and grouting material for deep-buried high-pressure water-rich tunnel
Example 3:
(1) Acquiring tunnel geological survey design data, supplementing exploration data according to the condition of water burst and mud burst disasters, wherein the supplementing exploration data comprises hydrogeological test data, geophysical exploration data and drilling coring data;
(2) Exploring disaster-causing water-containing bodies, fault rock soil bodies, engineering geological characteristics and geological space forms of the fault rock soil bodies;
(3) Judging the surrounding rock injectivity, the surrounding rock grade, the thickness of the surrounding rock reinforcing ring, the runoff characteristic and the drilling difficulty level according to the data;
(4) Providing a water and mud outburst disaster support strengthening mode and implementation;
(5) The deep energy-releasing pressure-releasing drilling construction is used for grouting process control and grouting safety control, grouting information such as grouting amount, grouting pressure and grouting speed is fed back, and stability, water burst and mud burst amount and water pressure are monitored in a tracking mode in the whole process;
(6) And (4) performing grouting parameter adjustment and drilling dynamic adjustment according to the grouting control step feedback information, performing grouting by using a water burst grouting material of the deeply-buried high-pressure water-rich tunnel, and finally performing grouting water plugging reinforcement effect evaluation.
The preparation method of the water burst grouting material for the deep-buried high-pressure water-rich tunnel used in the step (6) comprises the following steps: uniformly stirring 30% of rapid hardening sulphoaluminate cement, 15% of sorbitol, 10% of xylitol, 1.0% of stannous octoate, 2% of hexanol and 3% of polymethyl triethoxysilane for 15min at 500rmp, and uniformly mixing to obtain a component A; then, 20% of diphenylmethane diisocyanate (MDI) and 19% of Hexamethylene Diisocyanate (HDI) are subjected to vacuum drying for 2 hours in a vacuum drying oven at the temperature of 100 ℃ to obtain a component B; and (3) putting the component A and the component B into a storage vat, stirring for 15s, pumping by using a double-slurry pump at the pressure of 10MPa, injecting into the tunnel face and the surrounding rock cracks, and finishing grouting when the pressure reaches 15 MPa.
When the grouting effect is checked by a grading method, the tunnel after grouting is rated by 95, and the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel are met.
The basic properties of the water burst grouting material for the deep-buried high-pressure water-rich tunnel are shown in Table 3, wherein the density of the grouting material is 1.69g/cm 3 The compressive strength is 56MPa, and the water permeability coefficient is 0.8 x 10 -8 m/s, meets the design requirements.
TABLE 3 basic performance of water gushing grouting material for deep-buried high-pressure water-rich tunnel
The above examples 1 to 3 are respectively treated by different grouting processes according to the advanced drilling water detection result. When the number of the water detection holes is 1/3, the total water yield is more than 10m 3 When the pressure is in the second stage, adopting full-section curtain grouting; when the total water amount is less than 10m 3 The water yield of each hole is more than 2m 3 When the pressure is in the second stage, grouting by adopting a local advanced small guide pipe; when the water yield of the drill hole is less than 2m 3 Per hour and the total water yield is less than 10m 3 And during the hour, adopting an advanced anchor rod for supporting and grouting.
The full-section curtain grouting design parameters are as follows: the grouting reinforcement range is 1-2 times of the hole diameter outside the tunnel excavation contour line, the length of each circulating grouting section is 30m, the hole diameter is 90-180 mm, the grouting pressure is 2-3 times of the water pressure, and the slurry diffusion radius is 2m. According to the grouting pressure, the first circulating concrete grout stopping wall is 1-3 m thick. The grouting mode can adopt sleeve valve pipe retreating type or orifice pipe subsection advancing type grouting according to the water pressure and the hole forming difficulty. And (4) inspecting the grouting effect after grouting, and excavating 25m in each cycle when the excavating effect is achieved, and reserving 5m of C30 reinforced concrete grout stop wall. If weak parts exist after excavation, long pipes or short pipes are adopted for local supplementary grouting (supplementary grouting).
The design parameters of the advanced small conduit grouting are as follows: the grouting holes are arranged to have the hole diameter of 42mm, the hole depth of 4.5m, the reserved section length of 10m, the grouting hole spacing of 0.8-1.0m, the water-rich area of 0.8m and the other areas of 1.0m, and grouting is performed sequentially from bottom to top, from outside to inside and at intervals.
The design parameters of the advanced anchor rod support grouting are as follows: arranging grouting holes with the aperture of 89mm, the hole depth of 6.0m, the length of the reserved section of 10m, the distance between the grouting holes of 0.8-1.0m, the water-rich area of 0.8m, the other areas of 1.0m, and grouting sequentially from bottom to top, from outside to inside and at intervals to carry out advanced anchor rod support grouting design.
Claims (9)
1. The application method for water plugging and reinforcement of the water burst grouting material of the deep-buried high-pressure water-rich tunnel is characterized in that the grouting material consists of 20-40wt% of quick-hardening sulphoaluminate cement, 10-20wt% of sorbitol, 10-15wt% of xylitol, 20wt% of diphenylmethane diisocyanate, 10-20wt% of hexamethylene diisocyanate, 1.0wt% of catalyst, 2wt% of chain extender and 3wt% of defoaming agent;
the water plugging and reinforcing application method comprises the following specific steps:
(1) Acquiring tunnel geological survey design data, supplementing exploration data according to the condition of water burst and mud burst disasters, wherein the supplementing exploration data comprises hydrogeological test data, geophysical exploration data and drilling coring data;
(2) Exploring disaster-causing water-containing bodies, fault rock soil bodies, engineering geological characteristics and geological space forms of the fault rock soil bodies;
(3) Determining the injectivity, grade, thickness of the surrounding rock reinforcing ring, runoff characteristics and drilling difficulty of the surrounding rock according to the data;
(4) Providing a water and mud outburst disaster support strengthening mode and implementation;
(5) The deep energy-releasing pressure-releasing drilling construction is used for grouting process control and grouting safety control, grouting information of grouting amount, grouting pressure and grouting speed is fed back, and stability, water burst and mud burst amount and water pressure are monitored in a whole-process tracking mode;
(6) And (4) performing grouting parameter adjustment and drilling dynamic adjustment according to the grouting control step feedback information, performing grouting by using a water burst grouting material of the deeply-buried high-pressure water-rich tunnel, and finally performing grouting water plugging reinforcement effect evaluation.
2. The water shutoff and reinforcement application method according to claim 1, wherein the catalyst is one or more of triethanolamine, sodium hexadecylbenzene sulfonate and stannous octoate.
3. The water shutoff and reinforcement application method according to claim 1, wherein the chain extender is one or more of 1, 4-butanediol, pentanol and hexanol.
4. The method for water shutoff reinforcement application according to claim 1, wherein the defoaming agent is polymethyltriethoxysilane.
5. The water plugging and reinforcing application method according to claim 1, wherein the preparation method of the water inrush grouting material for the deep-buried high-pressure water-rich tunnel comprises the following steps: stirring the fast hardening sulphoaluminate cement, sorbitol, xylitol, catalyst, chain extender and defoamer for 15min at 300-500rmp, and uniformly mixing to obtain a component A; carrying out vacuum drying on diphenylmethane diisocyanate and hexamethylene diisocyanate at 100 ℃ for 2h to obtain a component B; and (3) putting the component A and the component B into a storage vat, stirring for 10-15s, and mixing to obtain the water gushing grouting material for the deep-buried high-pressure water-rich tunnel.
6. The water shutoff reinforcement application method according to claim 1, wherein the step (6) is implemented by pumping grouting at a pressure of 5-20MPa by means of a single-slurry pump or a double-slurry pump, the grouting is implemented by injecting the grouting into the tunnel face and the surrounding rock cracks, and the grouting is finished when the pressure reaches 10-20 MPa.
7. The method for applying water shutoff reinforcement according to claim 1, wherein the grouting in step (6) is shallow curtain grouting, full-section curtain grouting, advanced ducted grouting or advanced anchor rod grouting.
8. The water plugging and reinforcing application method according to claim 1, wherein a grading method is adopted for evaluating the grouting water plugging and reinforcing effect, the grade of the tunnel after grouting is more than 90 points, and the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel are met.
9. The application method of water shutoff and reinforcement according to claim 1, wherein the evaluation of the grouting water shutoff and reinforcement effect adopts a drilling inspection method, the compressive strength of a consolidated body core sample is greater than 20.0MPa, and the water permeability coefficient is not less than 10 -7 And m/s, meeting the water plugging and reinforcing requirements of the deeply buried high-pressure water-rich tunnel.
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