CN114702291A - Grouting material for water inrush and mud inrush in tunnel fault fracture zone and water plugging and reinforcing design method thereof - Google Patents
Grouting material for water inrush and mud inrush in tunnel fault fracture zone and water plugging and reinforcing design method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 238000013461 design Methods 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 24
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 239000004571 lime Substances 0.000 claims abstract description 8
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 229920002635 polyurethane Polymers 0.000 claims abstract description 8
- 239000004814 polyurethane Substances 0.000 claims abstract description 8
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 20
- 230000009172 bursting Effects 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 10
- 239000011440 grout Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 230000001052 transient effect Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000009933 burial Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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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
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
-
- 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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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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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
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a grouting material for water inrush and mud inrush in a tunnel fault fracture zone and a water plugging and reinforcing design method thereof. The grouting material is composed of sand, fly ash, lime, bentonite, water and waterborne polyurethane. The design method for water plugging and reinforcement is characterized in that when the water burst and mud burst amount of a large fault broken zone is large, circuitous guide pits are adopted for circuitous excavation, a sluiceway is adopted for energy reduction and pressure relief, after the water burst and mud burst are finished, the tunnel face is excavated by adopting full-section curtain grouting and then reinforced by radial grouting, the top plate or bottom plate of the lining and surrounding rocks above the level III are grouted by small leading guide pipes, and surrounding rocks below the level III and the level III are grouted by leading anchor rods. The grouting material has excellent mechanical characteristics, ultralow permeability coefficient and excellent durability, and the water plugging and reinforcing design method can be used for rapidly repairing and plugging water and mud inrush disasters of the tunnel fault and rapidly penetrating through a water and mud inrush tunnel, so that the water and mud inrush tunnel is operated safely and stably for a long time, and the service life of the water and mud inrush tunnel in a fault fracture zone is prolonged.
Description
Technical Field
The invention belongs to the technical field of tunnel grouting, and particularly relates to a grouting material for water inrush and mud inrush in a tunnel fault fracture zone and a water plugging and reinforcing design method thereof.
Background
With the rapid development of infrastructure construction, the tunnel engineering construction in China continuously shows the characteristics of large burial depth, long tunnel line, high stress, strong karst, high water pressure, complex structure and frequent disasters, and the water and mud outburst disasters are also increasingly severe. The tunnel water bursting and mud bursting refers to complex geological disasters caused by drilling explosion or excavation disturbance, when the disasters happen, a mixture of broken stones, soil bodies and water gushes out from a mud bursting port at a high speed in a large amount in a short time, after the water bursting and mud bursting happen, the pressure of tunnel surrounding rocks can be unloaded, the energy accumulated inside the surrounding rocks is released instantaneously, and the water bursting and mud bursting are finished. Therefore, how to effectively avoid and treat the water and mud bursting disasters of the broken zone of the tunnel fault is an important scientific problem to be solved urgently in China's tunnel construction. The grouting material for water inrush and mud inrush in a tunnel fault broken zone and the water plugging and reinforcing design method thereof are key for solving the important scientific problem, and have important significance for treating water inrush and mud inrush disasters in the tunnel fault broken zone, shortening the construction period of tunnel construction under complex geological conditions, reducing the construction cost and prolonging the service life of the tunnel.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a grouting material for water inrush and mud inrush in a tunnel fault fracture zone, which has excellent mechanical properties, ultralow permeability coefficient and excellent durability, and a water plugging and reinforcing design method of the grouting material for quickly repairing the water inrush and mud inrush in the tunnel fault fracture zone.
The grouting material for water inrush and mud inrush in a tunnel fault fracture zone consists of 40-50 wt% of sand, 20 wt% of fly ash, 3-5 wt% of lime, 2 wt% of bentonite, 15 wt% of water and 10-20 wt% of waterborne polyurethane.
The preparation method of the grouting material for water inrush and mud inrush in the broken zone of the tunnel fault comprises the following steps: stirring and evenly mixing sand, fly ash, lime, bentonite and 100-inch water at 1000rmp for 15-30min, then adding waterborne polyurethane and stirring for 15-30s to obtain the grouting material for water inrush and mud inrush in the tunnel fault fracture zone.
The water plugging and reinforcing design method of the grouting material for water inrush and mud inrush in the broken zone of the tunnel fault comprises the following steps:
(1) acquiring hydrogeological data and analyzing hydrogeological conditions;
(2) exploring the disaster-causing aquifer and the water-containing structural form, and measuring the water burst and mud burst amount;
(3) comprehensively detecting the grade of tunnel surrounding rock, the water-containing structure of a main control area and selecting a key treatment area by means of geological radar, transient electromagnetism and drilling exposure;
(4) providing a supporting and strengthening method and implementation for water and mud outburst disasters in fault fracture zones;
(5) drilling hole arrangement, namely determining grouting parameters such as the thickness of a reinforcing ring, the number of the arranged holes, the depth of a grouting hole, the grouting interval and the like, and dynamically regulating and controlling the grouting parameters and the drilling hole arrangement according to a hydraulic communication test, on-site real-time monitoring, drilling hole disclosure data, water burst mud bursting stability monitoring, water burst mud bursting amount monitoring and water pressure monitoring;
(6) grouting the key hole by using a grouting material for water bursting and mud bursting of the tunnel fault fracture zone; giving the area and specific range of a key grouting area to reduce the dosage of grouting materials and ensure the grouting effect;
(7) and (5) grouting the drainage holes and evaluating the grouting and water plugging reinforcing effect.
The hydrogeological data is a hydrogeological map with the ratio of 1:500 and 500000.
And (2) accurately detecting the width, the length, the space form and the water volume of the aquifer, and giving data of the maximum water inflow, the normal water inflow and the average water inflow.
And (4) when the water and mud burst amount of the large fault broken zone is large, roundabout guide pits are adopted for roundabout excavation, and a water drain tunnel is adopted for energy reduction and pressure relief. Furthermore, a 2-position grout stopping rock disk with the length of no less than 5m is arranged at the position, close to the fault fracture zone, of the circuitous guide pit so as to ensure that water and mud outburst at the fault fracture zone cannot affect front and rear construction.
And (6) after water and mud inrush are finished, adopting full-section curtain grouting for excavation of the tunnel face, assisting radial grouting for reinforcement, lining a top plate or a bottom plate, adopting a small advanced guide pipe for grouting for surrounding rocks above the level III, adopting advanced anchor rods for grouting for surrounding rocks below the level III and the level III, and injecting water and mud inrush breach, the tunnel face and lining through high pressure.
The high-pressure injection pressure is not less than 10MPa, and the grouting pressure which is 2-3 times higher than the hydrostatic pressure is adopted to ensure that the grout can quickly and fully block water burst and mud burst.
And (5) uniformly distributing holes, quincunx distributing holes or distributing holes in multiple layers with not less than 3 circles.
And (4) evaluating in the step (7) by adopting a grading method, wherein the grade of the tunnel after grouting is more than 85, and the water plugging and reinforcing design requirements of the grouting material for water inrush and mud inrush in the fault fracture zone of the tunnel are met.
The evaluation of the step (7) adopts a drilling inspection method, the compressive strength of the consolidated body core sample is not less than 10.0MPa, and the permeability coefficient is not less than 10-4m/s。
The grouting material for water inrush and mud inrush in the broken zone of the tunnel fault has excellent mechanical properties, ultralow permeability coefficient and excellent durability, the water shutoff reinforcement design method can quickly repair and block water inrush disasters in the broken zone of the tunnel fault, the treatment capacity of the water inrush and mud inrush disasters in the broken zone of the tunnel building and operating tunnel fault is improved, the construction period of tunnel construction under complex geological conditions is shortened, the construction cost is reduced, the water inrush and mud inrush tunnel is quickly communicated, the water inrush and mud inrush tunnel is operated safely and stably for a long time, the service life of the water inrush and mud inrush tunnel in the broken zone of the fault is prolonged, and remarkable economic and social benefits are generated.
Detailed Description
Example 1:
(1) acquiring hydrogeological data and analyzing hydrogeological conditions; hydrogeological data is 1:500000 hydrogeological map.
(2) Exploring the disaster-causing aquifer and the water-containing structural form, and measuring the water burst and mud burst amount; the width, the length, the space form and the water quantity of the aquifer are accurately ascertained, and data of the maximum water inflow, the normal water inflow and the average water inflow are given.
(3) Comprehensively detecting the grade of tunnel surrounding rock, the water-containing structure of a main control area and selecting a key treatment area by means of geological radar, transient electromagnetism and drilling exposure;
(4) providing a supporting and strengthening method and implementation for water and mud outburst disasters in fault fracture zones; when the water and mud burst amount of the large fault fracture zone is large, roundabout guide pits are adopted for roundabout excavation and drainage tunnel energy reduction and pressure relief, and 2-position 5m grout stopping rock trays are arranged at the roundabout guide pits close to the fault fracture zone to ensure that the water and mud burst at the fault fracture zone cannot influence the front and back construction.
(5) The method comprises the following steps of drilling holes by adopting quincunx hole arrangement, determining grouting parameters such as the thickness of a reinforcing ring, the number of the hole arrangement, the depth of a grouting hole, grouting interval and the like, and dynamically regulating and controlling the grouting parameters and the hole arrangement according to a hydraulic communication test, on-site real-time monitoring, drilling hole disclosure data, water inrush and mud inrush stability monitoring, water inrush and mud inrush quantity monitoring and water pressure monitoring;
(6) grouting the key hole by using a grouting material for water inrush and mud inrush of the broken zone of the tunnel fault; and after the water inrush and mud inrush are finished, the tunnel face is excavated by adopting full-section curtain grouting and then reinforced by radial grouting, a top plate or a bottom plate is lined, surrounding rocks above the level III are grouted by adopting a small advanced guide pipe, surrounding rocks below the level III and the level III are grouted by adopting an advanced anchor rod, and the water inrush and mud inrush breach, the tunnel face and the lining are injected under the high pressure of not less than 10 MPa.
(7) And (5) grouting the drainage holes and evaluating the grouting and water plugging reinforcing effect.
Preparing a grouting material for water inrush and mud inrush in the broken zone of the tunnel fault: stirring 40% of sand, 20% of fly ash, 5% of lime, 2% of bentonite and 15% of water at 800rmp for 15min, uniformly mixing, then adding 18% of waterborne polyurethane, and stirring for 15 s.
When the grouting effect is detected by a grading method, the score of the grouted tunnel is 88, and the water-inrush mud-bursting water-plugging reinforcement requirement of a broken zone of the tunnel fault is met.
The basic properties of the above grouting material for water inrush and mud inrush in tunnel fault fracture zone are shown in Table 1, wherein the density of the grouting material is 1.89g/cm3Compressive strength of 15MPa and permeability coefficient of 1.2 x 10-6m/s, meets the design requirement.
TABLE 1 basic Properties of grouting materials for water and mud inrush in broken zone of tunnel fault
Example 2:
(1) acquiring hydrogeological data and analyzing hydrogeological conditions; hydrogeological data is 1:500000 hydrogeological map.
(2) Exploring the disaster-causing aquifer and the water-containing structural form, and measuring the water burst and mud burst amount; the width, the length, the space form and the water quantity of the aquifer are accurately ascertained, and data of the maximum water inflow, the normal water inflow and the average water inflow are given.
(3) Comprehensively detecting the grade of tunnel surrounding rock, the water-containing structure of a main control area and selecting a key treatment area by means of geological radar, transient electromagnetism and drilling exposure;
(4) providing a supporting and strengthening method and implementation for water and mud outburst disasters in fault fracture zones; when the water and mud outburst amount of the large fault broken zone is large, roundabout guide pits are adopted for roundabout excavation and drainage tunnels for reducing energy and releasing pressure, and 2-position 5m grout stopping rock trays are arranged at the positions, close to the fault broken zone, of the roundabout guide pits so as to ensure that the water and mud outburst at the fault broken zone cannot affect the front and back construction.
(5) Drilling holes by adopting 5 circles of layers, determining grouting parameters such as the thickness of a reinforcing ring, the number of the holes, the depth of the grouting holes, the grouting interval and the like, and dynamically regulating and controlling the grouting parameters and the hole distribution according to a hydraulic communication test, on-site real-time monitoring, drilling hole disclosure data, water inrush and mud inrush stability monitoring, water inrush and mud inrush monitoring and water pressure monitoring;
(6) grouting the key hole by using a grouting material for water inrush and mud inrush of the broken zone of the tunnel fault; and after the water inrush and mud inrush are finished, the tunnel face is excavated by adopting full-section curtain grouting and then reinforced by radial grouting, a top plate or a bottom plate is lined, surrounding rocks above the level III are grouted by adopting a small advanced guide pipe, surrounding rocks below the level III and the level III are grouted by adopting an advanced anchor rod, and the water inrush and mud inrush breach, the tunnel face and the lining are injected under the high pressure of not less than 10 MPa.
(7) And (4) grouting the drainage holes and evaluating the grouting and water plugging reinforcement effect.
Preparing a grouting material for water inrush and mud inrush in the broken zone of the tunnel fault: stirring 50% of sand, 20% of fly ash, 3% of lime, 2% of bentonite and 15% of water at 800rmp for 15min, uniformly mixing, then adding 10% of waterborne polyurethane, and stirring for 35 s.
When the grouting effect is detected by a grading method, the score of the grouted tunnel is 90, and the water inrush and mud inrush water plugging reinforcement requirement of a broken zone of the tunnel fault is met.
The basic properties of the above grouting material for water inrush and mud inrush in tunnel fault fracture zone are shown in Table 2, wherein the density of the grouting material is 2.01g/cm3Compressive strength of 18MPa and permeability coefficient of 1.8 x 10-6m/s, meets the design requirement.
TABLE 2 basic Properties of grouting materials for water and mud inrush in broken zone of tunnel fault
Example 3:
(1) acquiring hydrogeological data and analyzing hydrogeological conditions; hydrogeological data is 1:500000 hydrogeological map.
(2) Exploring the disaster-causing aquifer and the water-containing structural form, and measuring the water burst and mud burst amount; the width, length, space shape and water volume of the aquifer are accurately ascertained, and data of maximum water inflow, normal water inflow and average water inflow are given.
(3) Comprehensively detecting the grade of tunnel surrounding rock, the water-containing structure of a main control area and selecting a key treatment area by means of geological radar, transient electromagnetism and drilling exposure;
(4) providing a supporting and strengthening method and implementation for water and mud outburst disasters in fault fracture zones; when the water and mud outburst amount of the large fault broken zone is large, roundabout guide pits are adopted for roundabout excavation and drainage tunnels for reducing energy and releasing pressure, and 2-position 5m grout stopping rock trays are arranged at the positions, close to the fault broken zone, of the roundabout guide pits so as to ensure that the water and mud outburst at the fault broken zone cannot affect the front and back construction.
(5) The method comprises the following steps of drilling holes by adopting quincunx hole arrangement, determining grouting parameters such as the thickness of a reinforcing ring, the number of the hole arrangement, the depth of a grouting hole, grouting interval and the like, and dynamically regulating and controlling the grouting parameters and the hole arrangement according to a hydraulic communication test, on-site real-time monitoring, drilling hole disclosure data, water inrush and mud inrush stability monitoring, water inrush and mud inrush quantity monitoring and water pressure monitoring;
(6) grouting the key hole by using a grouting material for water inrush and mud inrush of the broken zone of the tunnel fault; and after the water inrush and mud inrush are finished, the tunnel face is excavated by adopting full-section curtain grouting and then reinforced by radial grouting, a top plate or a bottom plate is lined, surrounding rocks above the level III are grouted by adopting a small advanced guide pipe, surrounding rocks below the level III and the level III are grouted by adopting an advanced anchor rod, and the water inrush and mud inrush breach, the tunnel face and the lining are injected under the high pressure of not less than 10 MPa.
(7) And (5) grouting the drainage holes and evaluating the grouting and water plugging reinforcing effect.
Preparing a grouting material for water inrush and mud inrush in the broken zone of the tunnel fault: stirring 40% of sand, 20% of fly ash, 3% of lime, 2% of bentonite and 15% of water at 800rmp for 30min, uniformly mixing, then adding 20% of waterborne polyurethane, and stirring for 30 s.
When the grouting effect is checked by a grading method, the score of the tunnel after grouting is 84, and the water inrush and mud inrush water plugging reinforcement requirement of a broken zone of the tunnel fault is met.
The basic properties of the above grouting material for water inrush and mud inrush in tunnel fault fracture zone are shown in Table 3, wherein the density of the grouting material is 2.23g/cm3Compressive strength of 22MPa and permeability coefficient of 2.5 x 10-6m/s, meets the design requirement.
TABLE 3 basic Properties of water-burst grouting material for deep-buried high-pressure water-rich tunnel
Claims (9)
1. The grouting material for water inrush and mud inrush in a tunnel fault fracture zone is characterized by comprising 40-50 wt% of sand, 20 wt% of fly ash, 3-5 wt% of lime, 2 wt% of bentonite, 15 wt% of water and 10-20 wt% of waterborne polyurethane.
2. The preparation method of the grouting material for water inrush and mud inrush in a tunnel fault fracture zone according to claim 1, comprising the following specific steps: stirring and evenly mixing sand, fly ash, lime, bentonite and 100-inch water at 1000rmp for 15-30min, then adding waterborne polyurethane and stirring for 15-30s to obtain the grouting material for water inrush and mud inrush in the tunnel fault fracture zone.
3. The design method for water plugging and reinforcement of the grouting material for water inrush and mud outburst of the tunnel fault fracture zone as claimed in claim 1 comprises the following steps:
(1) acquiring hydrogeological data and analyzing hydrogeological conditions;
(2) exploring the disaster-causing aquifer and the water-containing structural form, and measuring the water burst and mud burst amount;
(3) comprehensively detecting the grade of tunnel surrounding rock, the water-containing structure of a main control area and selecting a key treatment area by means of geological radar, transient electromagnetism and drilling exposure;
(4) providing a supporting and strengthening method and implementation for water and mud outburst disasters in fault fracture zones;
(5) drilling hole arrangement, namely determining grouting parameters such as the thickness of a reinforcing ring, the number of the arranged holes, the depth of a grouting hole, the grouting interval and the like, and dynamically regulating and controlling the grouting parameters and the drilling hole arrangement according to a hydraulic communication test, on-site real-time monitoring, drilling hole disclosure data, water burst mud bursting stability monitoring, water burst mud bursting amount monitoring and water pressure monitoring;
(6) grouting the key hole by using a grouting material for water inrush and mud inrush of the broken zone of the tunnel fault;
(7) and (5) grouting the drainage holes and evaluating the grouting and water plugging reinforcing effect.
4. The method as claimed in claim 3, wherein the hydrogeological data is 1:500-500000 hydrogeological map.
5. The preparation method according to claim 3, wherein in the step (4), when the water-inrush and mud-inrush amount of the large fault broken zone is large, a roundabout pilot tunnel is adopted for roundabout excavation, and a drainage tunnel is adopted for reducing energy and releasing pressure; 2 grout stopping rock plates with the length of not less than 5m are arranged at the position, close to a fault fracture zone, of the circuitous guide pit so as to ensure that water and mud outburst at the fault fracture zone cannot affect front and back construction.
6. The preparation method according to claim 3, wherein in the step (6), after the water-bursting and mud-bursting are finished, the tunnel face is excavated by full-face curtain grouting and then reinforced by radial grouting, a top plate or a bottom plate is lined, surrounding rocks above the level III are grouted by a small advanced guide pipe, surrounding rocks below the level III and the level III are grouted by an advanced anchor rod, and the water-bursting and mud-bursting mouth, the tunnel face and the lining are injected at high pressure; the pressure of the high-pressure injection is not less than 10 MPa.
7. The preparation method according to claim 3, wherein the drilling layout of the step (5) adopts uniform hole distribution, quincunx hole distribution or multi-circle layer hole distribution with not less than 3 circles.
8. The preparation method according to claim 3, wherein the evaluation in the step (7) adopts a grading method, the tunnel score after grouting is more than 85 points, and the water plugging and reinforcing design requirements of the grouting material for water inrush and mud inrush in the broken zone of the tunnel fault are met.
9. The production method according to claim 3, wherein the evaluation in the step (7) is carried out by a borehole inspection method, and the consolidated body core sample has a compressive strength of not less than 10.0MPa and a permeability coefficient of not less than 10 "4 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210326150.6A CN114702291B (en) | 2022-03-30 | 2022-03-30 | Grouting material for water inrush and mud inrush in broken tunnel zone and water plugging and reinforcing design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210326150.6A CN114702291B (en) | 2022-03-30 | 2022-03-30 | Grouting material for water inrush and mud inrush in broken tunnel zone and water plugging and reinforcing design method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114702291A true CN114702291A (en) | 2022-07-05 |
| CN114702291B CN114702291B (en) | 2023-02-10 |
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| CN114702291B (en) | 2023-02-10 |
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