CN109578013A - A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall - Google Patents
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall Download PDFInfo
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- CN109578013A CN109578013A CN201811529871.7A CN201811529871A CN109578013A CN 109578013 A CN109578013 A CN 109578013A CN 201811529871 A CN201811529871 A CN 201811529871A CN 109578013 A CN109578013 A CN 109578013A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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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
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- 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
Abstract
The present invention provides a kind of method using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, is related to tunnel protection technical field.The following steps are included: S1. early-stage preparations；S2. it advanced tubule pre-pouring grout: is constructed using advanced tubule pre-pouring grout technology utilization advanced tubule pre-pouring grout technique；The dual-liquid slip-casting material includes liquid A and liquid B, and the second liquid is waterglass；The solution A includes: cement, flyash, bentonite, disodium hydrogen phosphate, aluminium oxide, sodium hydroxide, water according to parts by weight；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.2~1 to get the dual-liquid slip-casting material is arrived；S3. effect monitoring.Tunnel Landslide roof fall is handled using the construction technology of advanced tubule pre-pouring grout using the dual-liquid slip-casting material, it can solve the problems, such as that conventional cement-waterglass slurries gel is too fast to a certain extent, structural stability and persistence are improved, and reduces construction cost.
Description
Technical field
The present invention relates to tunnel protection technical fields, and in particular to a kind of to use advanced tubule pre-pouring grout process tunnel
The method of road collapse and cave-in.
Background technique
With China's expanding economy, expressway construction project is more and more.Pass through ground in Highway Construction in Mountainous Area
When layer covers relatively thin Shallow Section, the accident of landslide and roof fall often occurs.When serious, big landslide can not only be blocked
Hole influences the progress of engineering, and has serious threat to the life of construction personnel.How vcehicular tunnel is effectively handled shallow
Burying a section collapse and cave-in is present issues that need special attention.
Injecting paste material is the main matter that filling and consolidation are played in stratum crack and hole, it be realize water blockoff or
The key of reinforcement effect.Injecting paste material can be divided into particulate slurry, chemical grout and fine mineral slurries.The graininess applied at present
Injecting paste material mainly has single liquid cement slurry, clay cement grout, cement-sodium silicate slurry.Cement-water-clay system is also referred to as C-S slurries,
Being is at present using cement and waterglass as host agent using most suspended type dual-liquid slip-casting materials of waterglass, and the two is pressed certain
Accelerator or retarder is added in ratio when necessary, the injecting paste material formed using biliquid injection mode.C-S slurries are public in processing
Road railway, water conservancy and hydropower, geotechnical engineering water leak accident and closure shaft wall leak application effect are preferable, in recent years adding in each field
Gu application is also more.Advantage is that gel time can be adjusted flexibly as needed from several seconds to a few minutes, and material source is extensive, price
Cheaply, non-toxic.However long-term engineering practice shows, C-S slurries Seed harvest durability is poor, and generally acknowledged C-S slurries are deposited at present
The problem of Seed harvest later strength declines, using being restricted, it is only used as temporary material in some industries, is rarely had
For permanently reinforcing.
Application No. is the patents of invention of CN201811083630.4 to disclose a kind of modified dual-liquid slip-casting material, using zeolite
The modified cement grout of powder, slag and cement composition, then mixes with waterglass, obtains injecting paste material, improve to a certain extent
The defect of traditional C-S slurries durability difference, but in processing Tunnel Landslide roof fall situation, especially intense weathering soft rock tunnel
When situation, however it remains the problem that gel is too fast, structural stability is poor.
In addition, front of tunnel heading geological conditions need to be verified first when implementing slip casting using injecting paste material, under normal circumstances,
The means such as geologic survey method, physical prospecting are more common.After front of tunnel heading geological conditions is verified, it can be implemented with according to geological conditions
Targetedly front pre-grouting is in the milk, and front pre-grouting grouting is general by the way of drilling and being in the milk parallel operations.It is advanced pre-
As disclosed big flow underground water during inlet well, drilling device, installation grouting equipment, complex procedures, time-consuming consumption need to be replaced
Power, cannot quick water blockoff, and increase the expense of pump drainage water.
Summary of the invention
Goal of the invention of the invention is to use advanced tubule pre-pouring grout process tunnel in view of the above-mentioned problems, providing
The method of collapse and cave-in can solve the problems, such as that conventional cement-waterglass slurries gel is too fast to a certain extent, and it is steady to improve structure
Qualitative and persistence, and reduce construction cost.
In order to achieve the above objectives, the technical scheme adopted by the invention is that:
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, the following steps are included:
S1. early-stage preparations: being in the milk to earth's surface Collapse Pit and backfill, and then completes the hardening Seal treatment of earth's surface coombe, carries out
Coombe drainage works, it is ensured that water flow is not directly lower in coombe seeps.
S2. advanced tubule pre-pouring grout: advanced tubule pre-pouring grout technology utilization advanced tubule pre-pouring grout technique is used
It constructs.
The dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A is according to parts by weight packet
Include following components: 500~700 parts of cement, 200~300 parts of flyash, 100~200 parts of bentonite, disodium hydrogen phosphate 5~30
Part, 0~20 part of aluminium oxide, 5~10 parts of sodium hydroxide, 800~1000 parts of water；Liquid A and liquid B is pressed to the volume ratio of 1 ︰ 0.2~1
It uniformly mixes to get the dual-liquid slip-casting material is arrived.
S3. effect monitoring: water absorption rate or infiltration coefficient test are carried out after slip casting terminates 14d, determines whether qualification；It excavates
Leakage water spot is met in the process and reinforces slip casting closure, it is ensured that side wall is without bright water.
Preferably, the waterglass Baume degrees is 25~38Be '.
Preferably, the cement is the ordinary portland cement that intensity is 42.5.
Preferably, for the moisture content of the flyash less than 0.2%, partial size is 5 μm -25 μm.
Preferably, liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
Preferably, in step S2, the advanced tubule pre-pouring grout technique includes: positioning, drilling, installation and slip casting.
Preferably, in boring procedure, long duct angle is in 8~12 °, short-range missile tube angulation at 15~25 °.
Preferably, during slip casting, first pressing 0.3Mpa, final pressure 1.0Mpa are climbed to final pressure from first pressing and keep
Terminate to slip casting；Grouting pressure reaches final pressure 1.0Mpa, when dual-liquid slip-casting material injection rate reaches 80% of calculated value or more, i.e.,
It can stop slip casting.
Preferably, in step S3, inspection hole water yield should be less than 0.4L/min.m, and inspection hole is intake under 1.0MPa pressure
Amount should be less than 2L/min.m, otherwise should encrypt bored grouting.
Cement-water-clay system condenses hardening mechanism:
The ingredient of cement is tricalcium silicate (C2S), dicalcium silicate (C2S), tricalcium aluminate (C3) and tetra calcium aluminoferrite A
(C4AF).The above two are the main component of cement, account for the 70%~80% of cement gross mass.The water of tricalcium silicate and dicalcium silicate
It is essentially identical to change reaction product, is all hydrated calcium silicate (C-S-H) and calcium hydroxide (Ca (OH)2), only hydration reaction speed
With heat of hydration height difference.Hydration reaction can be expressed with following formula:
C3S(C2S)→C-S-H+nCa(OH)2 (1)
The hydrated product hydrated calcium silicate of cement is in glial state, is practically insoluble in water, and the calcium hydroxide generated is quickly
It is reacted with waterglass, reaction process is as follows:
nCa(OH)2+Na2·SiO2+mnH20→n(CaO·SiO2·mH20)↓+2NaOH (2)
Reaction be carried out continuously generate have some strength gel, with by filling rock mass it is cementing-together, intensity is continuous
Increase is converted into stable solidifying body, to achieve the purpose that consolidation by grouting.
Flyash, cement-water-clay system alkali-activated carbonatite mechanism of polymerization:
Research shows that NaOH and flyash, bentonite, which can react, generates the formation alkali-activated carbonatite gelling of class zeolite material
Material, Na+It is present in hydrated product with chemically bound form.Polymer obtained is reacted with flyash using NaOH, is had
Good Na+Ability to cure can improve the pore structure of Seed harvest, and the porosity for keeping Seed harvest total reduces, average pore size drop
It is low, pore structure refinement, to improve the later period compression strength of Seed harvest.
Due to the adoption of the above technical scheme, the invention has the following advantages:
1. the method for the invention using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, the biliquid note of use
Pulp material adds flyash, bentonite, disodium hydrogen phosphate, aluminium oxide, hydrogen-oxygen on the basis of conventional cement-waterglass slurries
Change sodium, on the one hand postpones the gel time of dual slurry, on the other hand improve the pore structure of Seed harvest, to improve the strong of Seed harvest
Degree and durability.
Addition flyash and bentonite can react in the case where alkalinity is submitted generates class zeolite material formation alkali-activated carbonatite glue
Gel material improves the pore structure of Seed harvest, and the porosity for keeping Seed harvest total reduces, and average pore size reduces, pore structure refinement, thus
Improve the later period compression strength of Seed harvest.Price of the current 42.5 cement unit price compared with the high half of flyash, incorporation flyash replacement
Part of cement, knot has saved construction cost to a certain degree while reaching water blockoff.Addition bentonite can also improve slurries calculus
The impermeability of body reduces running pulp phenomenon and invalid diffusion phenomena during slip casting, saves injecting paste material, improves slip casting effect
Rate.
Addition disodium hydrogen phosphate can significantly postpone the gel time of dual slurry, neither it be made to condense rapidly and generate plugging
Phenomenon, and early epistasis energy will not be lost too long because of slow setting, to improve Seed harvest compression strength.Add NaOH and flyash
It can react and generate class zeolite material formation alkali-activated carbonatite cementitious material, so as to improve the pore structure of Seed harvest, raising calculus
The later period compression strength of body.
2. the method that the present invention uses the Tunnel Landslide roof fall of advanced tubule pre-pouring grout process, using advanced tubule
Pre-pouring grout mode, during ductule and tunnel cutting, pore-forming situation is all preferable, and conduit heads into very smoothly, without collapse hole etc.
Situation occurs, after the completion of pre-pouring grout, it is not necessary to which next process can be carried out for a long time by waiting, and illustrate pre grouting from the working face
Plumpness and setting time all meet actual needs, reduce the loss of duration.Ductule is radially set, effectively reinforcing periphery
Country rock makes country rock participate in stress, compensates for the adjoining rock stability of no steel tube shed supporting.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, the following steps are included:
S1. early-stage preparations: being in the milk to earth's surface Collapse Pit and backfill, and then completes the hardening Seal treatment of earth's surface coombe, carries out
Coombe drainage works, it is ensured that water flow is not directly lower in coombe seeps.
S2. advanced tubule pre-pouring grout: advanced tubule pre-pouring grout technology utilization advanced tubule pre-pouring grout technique is used
It constructs.
The dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A is according to parts by weight packet
Include following components: 700 parts of cement, 200 parts of flyash, 100 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, hydroxide
10 parts of sodium, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
The advanced tubule pre-pouring grout technique includes: positioning, drilling, installation and slip casting.In boring procedure, long duct angle
Degree is in 8~12 °, short-range missile tube angulation at 15~25 °.During slip casting, first pressing 0.3Mpa, final pressure 1.0Mpa are fast from first pressing
Speed, which rises to final pressure and remains to slip casting, to be terminated；Grouting pressure reaches final pressure 1.0Mpa, and dual-liquid slip-casting material injection rate reaches calculating
Value 80% or more when, slip casting can be stopped.
S3. effect monitoring: water absorption rate or infiltration coefficient test are carried out after slip casting terminates 14d, determines whether qualification；It excavates
Leakage water spot is met in the process and reinforces slip casting closure, it is ensured that side wall is without bright water.
Inspection hole water yield should be less than 0.4L/min.m, and inspection hole inflow should be less than 2L/ under 1.0MPa pressure
Otherwise min.m should encrypt bored grouting.
Embodiment 2
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
The dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A is according to parts by weight packet
Include following components: 600 parts of cement, 300 parts of flyash, 100 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, hydroxide
10 parts of sodium, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
Embodiment 3
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 500 parts of cement, 300 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
Embodiment 4
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 450 parts of cement, 350 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
Embodiment 5
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 500 parts of cement, 300 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.2 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
Embodiment 6
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 500 parts of cement, 300 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.3 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 5 μm -25 μm.
Embodiment 7
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 500 parts of cement, 300 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
Embodiment 8
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, compared with Example 1, step
Dual-liquid slip-casting material in S2 is formulated difference, other steps are identical.
Dual-liquid slip-casting material, including liquid A and liquid B, the second liquid are waterglass；The solution A according to parts by weight include with
Lower component: 500 parts of cement, 300 parts of flyash, 200 parts of bentonite, 20 parts of disodium hydrogen phosphate, 10 parts of aluminium oxide, sodium hydroxide 10
Part, 1000 parts of water；Liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 1 to get the dual-liquid slip-casting material is arrived.
The waterglass Baume degrees is 35Be '.The cement is the ordinary portland cement that intensity is 42.5.
For the moisture content of the flyash less than 0.2%, partial size is 15 μm.
The dual-liquid slip-casting material performance used Examples 1 to 8 preparation is measured, and measurement result is shown in Table 1.
1 result test comparison of table
Can be seen that dual-liquid slip-casting material of the invention from the data of embodiment 1-8 combination table 1 can postpone dual slurry
Gel time, and improve the pore structure of Seed harvest, to improve the intensity and durability of Seed harvest.
It can be seen that the increase with doping quantity of fly ash, the gel time of slurries from the data of embodiment 1-4 combination table 1
It is gradually increased, and doping quantity of fly ash is bigger, and the compression strength of Seed harvest increases, but as doping increases, pressure resistance
Degree can be declined, and therefore, answer strict control dosage.
It can be seen that the reduction with cement-sodium silicate ratio, Water glass content from the data of embodiment 5-8 combination table 1
Increase, the gel times of slurries extends, but the compression strength of Seed harvest reduces, relatively more reasonable in 1 ︰ 0.5.
Embodiment 9
Specific construction situation
Stone mill ridge tunnel entrance is located at Hezhou City Zhaoping County outskirts of a town, and outlet is located at Zhaoping County asparagus fern town, and length is 4067m points
From the ridge Shi Yue super long tunnel；Tunnel maximum buried depth about 559.5m crosses over coombe, thickness 11.5m at minimum overburden layer.According to surveying
It examines, stone mill ridge Close Tunnel stratum is mainly system and the lower subgroup stratum group of Cambrian system mouth of a river group under eluvial layer, the Devonian system by the 4th
At being respectively as follows: erratic boulder silty clay, severely-weathered argillaceous siltstoue, middle weathered layer argillaceous siltstoue from top to bottom.Tunnel surrounding section
It manages crack relatively to develop, rock crushing.
Collapse and cave-in event summary
11.5m, left and right are pushed up away from hole far from the coombe that catchments at one, coombe lowest part is worn under at the 220m of hole in the tunnel Zhaoping hole Duan Zuo
Line rock stratum riverbed area is based on erratic boulder layer, and underlie severely-weathered argillaceous siltstoue.The rock stratum is smashed to pieces, meets water and easily softens, loses
Self-stable ability, the 6 points of left lines on the 12nd of August in 2018, which tunnel to ZK57+680 riverbed area to slip, to collapse, and slipping the soil body that collapses is soft powder
Sandy gravel soils are 2 meters to the left of vault to haunch, and about 8 meters of circumferential width, past big pile No. direction caves in about 6 meters of length, depth of caving in
About 5 meters, landslide amount about 240m3.To 13 days 10 points collapse to earth's surface, earth's surface forms radius about 4m, deep 3.5m.
Use raw material: cement: China Resources cement is P.042.5；Waterglass buying is raw in the grand new material limited liability company in Zhuzhou
Production lot number is xl-QESIV-ZJ-08；Water is drinking water；Measuring waterglass density through test is 1320Kg/m3, and Baume degrees is
35.0Be’。
Specific processing scheme:
A method of using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, the following steps are included:
S1. early-stage preparations: being in the milk to earth's surface Collapse Pit and backfill, and then completes the hardening Seal treatment of earth's surface coombe, carries out
Coombe drainage works, it is ensured that water flow is not directly lower in coombe seeps.
To collapse in hole chamber using pumping C20 concrete filling, and using geological radar to country rock carry out geology sondage, verify whether
There are still cavitys, have such as verified cavity, using pumping C20 concrete filling.
After the completion of backfilling back-pressure work in hole, the backfill of C20 concrete, pump are pumped using modes such as adapter tubes to earth's surface subsidence area domain
Vehicle and loaded vehicle are forbidden out to collapsing within the scope of pit edge 20m.
After grouting backfill is cheated in surface subsidence, the hardening Seal treatment of massif earth's surface coombe is completed as early as possible, carries out punching
Ditch water discharge work, it is ensured that infilter under water flow is not direct in coombe into massif.
S2. advanced tubule pre-pouring grout: advanced tubule pre-pouring grout technology utilization advanced tubule pre-pouring grout technique is used
It constructs.
According to the formula of embodiment 3, cement, flyash, bentonite, disodium hydrogen phosphate, aluminium oxide, hydrogen-oxygen are weighed in proportion
Change sodium and water, stirs, uniform slurry i.e. solution A is made；The waterglass i.e. second watch is weighed in proportion, is mixed into the first
In liquid, it is again stirring for uniformly up to the dual-liquid slip-casting material.
1. positioning: according to the mileage of design, marking the orifice position of ductule, ductule circumferential direction spacing in excavation face
1.2m, longitudinal pitch 1.2m.
2. drilling: normal no swell water area ductule is radially set by tunnel, has water burst region according to ductule diffusion half
0.5 meter of calculating cloth pitch of holes of diameter is 1 meter of length interlaced arrangement, is marked on steel grating with red paint；It will be in steel pipe front end
Heart alignment mark is headed into stratum using wind high-pressure blast, heads into length is not less than length of steel pipe 90%.Long duct angle is 8
~12 ° or so, short-range missile tube angulation is at 15~25 ° or so.Steel pipe with quick-setting mortar blocks aperture and surrounding crack after the completion of installing,
It prevents from emitting outside slurries when slip casting.
3. installation: the ductule that will have been processed throws eyelet into, and surrounding catheter is blocked with plasticine for physical, stays 35cm left outside
Right length connects slip casting hose.
4. slip casting: slip casting carries out the sequence of construction of slip casting downwards from arch sequence to determine that grouting parameter-sets up slip casting
It stands-formal slip casting-inspection-the record of pump testing-packer permeability test-.
According to water burst pressure (excavated surface hydrostatic pressure, the dynamic pressure of gushing water), crack size and degree of roughness, slurries
Each concentration of property, requirement dilation angle determine grouting pressure.According to setting time, consolidating strength and constructing operation etc.
Factor determines concentration of slurry.
Grouting sequence first applies short-bore in principle, then applies long hole, finally applies inspection hole.By " from outside to inside, from upper past
Under " principle constructs, in combination with reading aloud water water source point position and water (flow) direction, by sequentially being applied by " having water hole to no water hole "
Make；Inspection hole sequence of construction is to the end of injected hole slip casting depending on backsight field condition.
When mud jacking, match ratio is usually first dilute rear dense, converts step by step, and pass through the discharge coefficient of two grouting pumps, to control
Gelling time.
When there is mortar in adjacent non-injected hole；Grouting pressure reaches design final pressure 1.0Mpa；Slurries injection rate reaches meter
Calculation value 80% or more when, slip casting can be stopped.After slip casting, slurries in timely cleaning pipe, and sealed with plasticine for physical,
To increase the stiffness and strength of ductule.
S3. effect monitoring: water absorption rate or infiltration coefficient test are carried out after slip casting terminates 14d, determines whether qualification；It excavates
Leakage water spot is met in the process and reinforces slip casting closure, it is ensured that side wall is without bright water.
Inspection hole water yield should be less than 0.4L/min.m, and inspection hole inflow should be less than 2L/ under 1.0MPa pressure
Otherwise min.m should encrypt bored grouting.
Stone mill ridge tunnel was constructed according to the above method on August 13rd, 2018, passed through the rich water on September 13rd, 2018
Section, lasts 30d, excavation supporting 26m (comprising getting out of a predicament or an embarrassing situation and inverted arch part), shows to utilize using the invention dual-liquid slip-casting material
The excavation that front pre-grouting technology combination ductule is applied to collapse and cave-in section is very successfully, to have reached design and construction
Purpose.
Above description is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
Bright patent claim, it is all the present invention suggested by technical spirit under completed same changes or modifications change, should all belong to
In the covered the scope of the patents of the present invention.
Claims (9)
1. a kind of method using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, which is characterized in that including following
Step:
S1. early-stage preparations: being in the milk to earth's surface Collapse Pit and backfill, and then completes the hardening Seal treatment of earth's surface coombe, carries out coombe
Drainage works, it is ensured that water flow is not directly lower in coombe seeps；
S2. it advanced tubule pre-pouring grout: is carried out using advanced tubule pre-pouring grout technology utilization advanced tubule pre-pouring grout technique
Construction；
The dual-liquid slip-casting material includes liquid A and liquid B, and the second liquid is waterglass；The solution A according to parts by weight include with
Lower component: 500~700 parts of cement, 200~300 parts of flyash, 100~200 parts of bentonite, 5~30 parts of disodium hydrogen phosphate, oxygen
Change 0~20 part of aluminium, 5~10 parts of sodium hydroxide, 800~1000 parts of water；Liquid A and liquid B is uniform by the volume ratio of 1 ︰ 0.2~1
It mixes to get the dual-liquid slip-casting material is arrived；
S3. effect monitoring: water absorption rate or infiltration coefficient test are carried out after slip casting terminates 14d, determines whether qualification；Digging process
Middle chance leakage water spot is reinforced slip casting and is blocked, it is ensured that side wall is without bright water.
2. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S2, the waterglass Baume degrees is 25~38Be '.
3. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S2, the cement is the ordinary portland cement that intensity is 42.5.
4. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S2, for the moisture content of the flyash less than 0.2%, partial size is 5 μm -25 μm.
5. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S2, liquid A and liquid B is uniformly mixed by the volume ratio of 1 ︰ 0.5 to get the dual-liquid slip-casting material is arrived.
6. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S2, the advanced tubule pre-pouring grout technique includes: positioning, drilling, installation and slip casting.
7. the method according to claim 1 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in boring procedure, long duct angle is in 8~12 °, short-range missile tube angulation at 15~25 °.
8. the method using advanced tubule pre-pouring grout process Tunnel Landslide roof fall stated according to claim 7, feature
It is, during slip casting, first pressing 0.3Mpa, final pressure 1.0Mpa, being climbed to final pressure from first pressing and remaining to slip casting terminates；
Grouting pressure reaches final pressure 1.0Mpa, when dual-liquid slip-casting material injection rate reaches 80% of calculated value or more, can stop slip casting.
9. the method according to claim 7 using advanced tubule pre-pouring grout process Tunnel Landslide roof fall, special
Sign is, in step S3, inspection hole water yield should be less than 0.4L/min.m, and inspection hole inflow should be less than under 1.0MPa pressure
Otherwise 2L/min.m should encrypt bored grouting.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111004008A (en) * | 2019-11-11 | 2020-04-14 | 河北大白阳金矿有限公司 | Method for reinforcing and reinforcing pre-control roof-pillar method ore pillar |
| CN111271083A (en) * | 2019-04-27 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Construction process for treating coal roadway roof area by using high-molecular grouting material |
| CN113089447A (en) * | 2021-04-22 | 2021-07-09 | 广东省水利水电第三工程局有限公司 | Concrete pavement void grouting construction method |
| CN116041032A (en) * | 2023-01-09 | 2023-05-02 | 中国建筑第八工程局有限公司 | Double-liquid slurry injection for freezing engineering gushing water and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204000900U (en) * | 2014-07-17 | 2014-12-10 | 陕西路桥集团第一工程有限公司 | A kind of ruggedized construction that is applied to the landslide of unsymmetrial loading tunnel hole |
| CN104628351A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Unsaturated loess ns composite grouting material and preparation method thereof |
| CN107165652A (en) * | 2017-06-02 | 2017-09-15 | 大唐林州热电有限责任公司 | A kind of tunnel monoblock type collapse after construction method |
| CN108678776A (en) * | 2018-03-29 | 2018-10-19 | 中交路桥北方工程有限公司 | Sandy clay geology tunnel treatment of roof collapse method |
| CN109534769A (en) * | 2018-12-14 | 2019-03-29 | 沈阳建筑大学 | A kind of application method of magnetorheological intelligent shield grouting material |
-
2018
- 2018-12-14 CN CN201811529871.7A patent/CN109578013B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104628351A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Unsaturated loess ns composite grouting material and preparation method thereof |
| CN204000900U (en) * | 2014-07-17 | 2014-12-10 | 陕西路桥集团第一工程有限公司 | A kind of ruggedized construction that is applied to the landslide of unsymmetrial loading tunnel hole |
| CN107165652A (en) * | 2017-06-02 | 2017-09-15 | 大唐林州热电有限责任公司 | A kind of tunnel monoblock type collapse after construction method |
| CN108678776A (en) * | 2018-03-29 | 2018-10-19 | 中交路桥北方工程有限公司 | Sandy clay geology tunnel treatment of roof collapse method |
| CN109534769A (en) * | 2018-12-14 | 2019-03-29 | 沈阳建筑大学 | A kind of application method of magnetorheological intelligent shield grouting material |
Non-Patent Citations (4)
| Title |
|---|
| 李永春: "浅谈盾构机在复杂地质条件下穿越高压燃气管道的施工技术", 《水力建设与管理》 * |
| 袁振春: "穿层钻孔过出水点快速封孔技术研究", 《山东煤炭科技》 * |
| 赵宏海 等: "裂隙岩体加固浆材的试验研究", 《长江科学院院报》 * |
| 陈金平等: "盾构法同步注浆材料的试验研究综述", 《粉煤灰综合利用》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271083A (en) * | 2019-04-27 | 2020-06-12 | 石家庄国盛矿业科技有限公司 | Construction process for treating coal roadway roof area by using high-molecular grouting material |
| CN111271083B (en) * | 2019-04-27 | 2021-04-06 | 石家庄国盛矿业科技有限公司 | Construction process for treating coal roadway roof area by using high-molecular grouting material |
| CN111004008A (en) * | 2019-11-11 | 2020-04-14 | 河北大白阳金矿有限公司 | Method for reinforcing and reinforcing pre-control roof-pillar method ore pillar |
| CN111004008B (en) * | 2019-11-11 | 2021-05-07 | 河北大白阳金矿有限公司 | Method for reinforcing and reinforcing pre-control roof-pillar method ore pillar |
| CN113089447A (en) * | 2021-04-22 | 2021-07-09 | 广东省水利水电第三工程局有限公司 | Concrete pavement void grouting construction method |
| CN116041032A (en) * | 2023-01-09 | 2023-05-02 | 中国建筑第八工程局有限公司 | Double-liquid slurry injection for freezing engineering gushing water and preparation method |
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