CN108590704A - Light section per-fore pouring liquid with small pipe pays maintaining method in advance - Google Patents
Light section per-fore pouring liquid with small pipe pays maintaining method in advance Download PDFInfo
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- CN108590704A CN108590704A CN201810393314.0A CN201810393314A CN108590704A CN 108590704 A CN108590704 A CN 108590704A CN 201810393314 A CN201810393314 A CN 201810393314A CN 108590704 A CN108590704 A CN 108590704A
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- hole
- ductule
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- grouting
- face
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims abstract description 43
- 239000011440 grout Substances 0.000 claims abstract description 25
- 230000008093 supporting effect Effects 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000008595 infiltration Effects 0.000 claims description 9
- 238000001764 infiltration Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 210000004911 serous fluid Anatomy 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000011378 shotcrete Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 16
- 210000005239 tubule Anatomy 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 34
- 238000007569 slipcasting Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004576 sand Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000004681 ovum Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of maintaining method of paying in advance of light section per-fore pouring liquid with small pipe, the maintaining method of paying in advance includes：Close face；It arranges prebored hole hole position, and punch operation is carried out based on prebored hole hole position, to obtain pre-pouring grout hole；Ductule is squeezed into the pre-pouring grout hole, and the ductule is fixed；Grouting operation is carried out to the ductule, to obtain injected hole；The supporting effect for examining the injected hole, to complete the pre support before tunnel excavation.Advanced arrangement ductule is carried out by the front to tunnel excavation face, and concrete is sprayed so that the country rock in front of tunnel excavation is firm together by the ductule, to play tunnel excavation face country rock stability effect, it simultaneously being capable of effective waterproof, further the ductule is fixedly attached together, the firm effect for also further improving advanced tubule, improves the stability of country rock, has ensured the safety of constructing tunnel.
Description
Technical field
The invention belongs to technical field of tunnel construction, and in particular to a kind of pre support side of light section per-fore pouring liquid with small pipe
Method.
Background technology
With the continuous development of engineering technology, for the continuous improvement of ability is naturally transformed, people are for underground construction
Ability be also continuously improved, further, with the continuous development of urbanization process, the demand of underground construction is also got in city
Come bigger, project under construction is also more and more.
During practice of construction, various geological conditions can be encountered, in the case where geological conditions is more stable,
Surrounding rock stability is high, and constructing tunnel difficulty is small, dangerous low, and in the case where geological conditions is poor, such as at some disconnected
During the self-stabilities such as layer, crushed zone, Shallow Section are poor or water rich strata, carry out tunnel excavation work be easy to cause country rock relaxation to
Cause the generation safety accidents such as water burst occurs, gushes sand, cave in.
To prevent that safety accident occurs in the construction process, the personal safety of construction personnel is ensured, when country rock is from steady energy
Power is within 12h, when even without self-stable ability, to stablize the excavation face in tunnel, ensuring that safe construction, construction personnel often need
It to do corresponding safeguard procedures in tunnel before construction, such as whitewashing, lining cutting, the methods of take steelframe, to be carried out to stratum
Grouting and reinforcing operates, while can also play the role of water blockoff.
For the tunnelling work under reply different geological conditions, a variety of different tunnel protection methods are produced, such as
Freezing process, normal bolting method, horizontal high pressure churning method, pipe shed method and slip casting method, however for middle sand and sand ovum (gravel) stone, and
It is existing anti-in the poor or geological conditions there are underground water of surrounding rock stabilities such as stratum of ovum (gravel) the stone diameter no more than 60mm
All there is certain defect in maintaining method, cannot be satisfied existing construction requirement.
Invention content
In order to overcome the means of defence of constructing tunnel in the prior art can not be effectively applied to surrounding rock stability it is poor or
There is technical issues that underground water, the embodiment of the present invention provide a kind of paying in advance for light section per-fore pouring liquid with small pipe
Maintaining method, by carrying out advanced arrangement ductule to the front in tunnel excavation face, and by the ductule spray concrete with incite somebody to action
Country rock in front of tunnel excavation is firm together, to play tunnel excavation face country rock stability effect, while can
The ductule is further fixedly attached together by effective waterproof, also further improves the firm effect of advanced tubule,
The stability for improving country rock has ensured the safety of constructing tunnel.
To achieve the above object, described the present invention provides a kind of maintaining method of paying in advance of light section per-fore pouring liquid with small pipe
Paying maintaining method in advance includes：Close face；It arranges prebored hole hole position, and punch operation is carried out based on prebored hole hole position, with
Obtain pre-pouring grout hole；Ductule is squeezed into the pre-pouring grout hole, and the ductule is fixed；To the ductule
Grouting operation is carried out, to obtain injected hole；The supporting effect for examining the injected hole, to complete the pre support before tunnel excavation.
Preferably, the closing face includes：To the face gunite concrete to close the face, wherein
The concrete thickness of injection is 8-12cm.
Preferably, the arrangement prebored hole hole position, and punch operation is carried out based on prebored hole hole position, to obtain pre- note
Hole is starched, including：The excavation contour line in tunnel is obtained, and the prebored hole hole position is arranged along excavation contour line outside,
Described in prebored hole hole position circumferential spacing be 0.5-1m；With it is with tunnel center line parallel and with the horizontal elevation angle for 5 ° -10 °
Angle carries out punch operation to prebored hole hole position, to obtain the pre-pouring grout hole.
Preferably, described that ductule is squeezed into the pre-pouring grout hole, and the ductule is fixed, including：
The ductule is squeezed into the pre-pouring grout hole, and the tail portion of the ductule and the steelframe in the tunnel are weldingly fixed on
Together.
Preferably, the ductule is the steel pipe of diameter 42mm, thickness of pipe wall 3.5mm, length 3.0m, before the ductule
End is cone-shaped, and the tail portion of the ductule is provided with the Reinforced Hoop of a diameter of 8mm, on the tube wall of the ductule described in distance
The position of tail portion 1.0m or more is provided with the mud jacking hole of a diameter of 8mm, and the mud jacking hole is in plum on the tube wall of the ductule
Flower pattern is arranged, and the spacing in the mud jacking hole is 15cm.
Preferably, described that grouting operation is carried out to the ductule, to obtain injected hole, including：Cement-silicate is double
Grouting serous fluid of the slurries as the grouting operation；Grouting operation is carried out to the ductule by grouting device, wherein described
The grouting pressure of grouting operation is 0.1-0.2Mpa；Obtain the injection speed and grouting pressure during the grouting operation；
In the case where the injection speed reaches preset pressure value less than pre-set velocity value or the grouting pressure, stop the slip casting
Operation.
Preferably, the supporting effect for examining the injected hole, to complete the pre support before tunnel excavation, including：
Before excavating the tunnel, the face is dug in examination, and obtains the infiltration situation of the face；In the face without apparent
In the case of infiltration, determines that the supporting effect of the injected hole is qualified, complete the pre support before the tunnel excavation；In the palm
In the case that there is apparent infiltration in sub- face, determines that the supporting effect of the injected hole is unqualified, the injected hole is noted again
Slurry operation, to complete the pre support before the tunnel excavation.
The technical solution provided through the invention, the present invention at least have the following technical effect that：
By carrying out advanced arrangement ductule to the front in tunnel excavation face, and by the ductule spray concrete with incite somebody to action
Country rock in front of tunnel excavation is firm together, to play tunnel excavation face country rock stability effect, while can
The ductule is further fixedly attached together by effective waterproof, also further improves the firm effect of advanced tubule,
The stability for improving country rock has ensured the safety of constructing tunnel.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Fig. 1 is the specific implementation flow for paying maintaining method in advance of light section per-fore pouring liquid with small pipe provided in an embodiment of the present invention
Figure；
Fig. 2 is that paying in advance for light section per-fore pouring liquid with small pipe provided in an embodiment of the present invention passes through punch operation in maintaining method
Obtain the schematic diagram in pre-pouring grout hole；
Fig. 3 is the structure for paying small conduit in maintaining method in advance of light section per-fore pouring liquid with small pipe provided in an embodiment of the present invention
Schematic diagram.
Specific implementation mode
In order to overcome the means of defence of constructing tunnel in the prior art can not be effectively applied to surrounding rock stability it is poor or
There is technical issues that underground water, the embodiment of the present invention provide a kind of paying in advance for light section per-fore pouring liquid with small pipe
Maintaining method, by carrying out advanced arrangement ductule to the front in tunnel excavation face, and by the ductule spray concrete with incite somebody to action
Country rock in front of tunnel excavation is firm together, to play tunnel excavation face country rock stability effect, while can
The ductule is further fixedly attached together by effective waterproof, also further improves the firm effect of advanced tubule,
The stability for improving country rock has ensured the safety of constructing tunnel.
The specific implementation mode of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this
The described specific implementation mode in place is merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Term " system " and " network " in the embodiment of the present invention can be used interchangeably." multiple " refer to two or two with
On, in consideration of it, " multiple " can also be interpreted as " at least two " in the embodiment of the present invention."and/or" describes affiliated partner
Incidence relation indicates may exist three kinds of relationships, for example, A and/or B, can indicate：Individualism A exists simultaneously A and B, single
Solely there are these three situations of B.In addition, character "/", unless otherwise specified, it is a kind of "or" to typically represent forward-backward correlation object
Relationship.In addition, it is necessary to understand, in the description of the embodiment of the present invention, the vocabulary such as " first ", " second " are only used for distinguishing
The purpose of description, is not understood to indicate or imply relative importance, can not be interpreted as instruction or hint sequence.
As shown in Figure 1, the present invention a kind of light section per-fore pouring liquid with small pipe disclosed pay maintaining method, the pre support side in advance
Method includes：
S10 face) is closed；
S20) arrangement prebored hole hole position, and punch operation is carried out based on prebored hole hole position, to obtain pre-pouring grout hole；
S30 ductule) is squeezed into the pre-pouring grout hole, and the ductule is fixed；
S40 grouting operation) is carried out to the ductule, to obtain injected hole；
S50 the supporting effect for) examining the injected hole, to complete the pre support before tunnel excavation.
In embodiments of the present invention, the closing face includes：It is described to close to the face gunite concrete
Face, wherein the concrete thickness sprayed is 8-12cm, it is preferable that the thickness of the concrete is 10cm.
Due in the poor geological environment of surrounding rock stability, if directly carrying out the grouting operation of advanced tubule, being easy
The concrete slurry of injection is caused to wash away out from face by the gap in country rock, to destroy the stability of face,
And further result in more serious construction accident.Therefore in embodiments of the present invention, before carrying out pre support, first to area
The concrete of 8-12cm thickness is sprayed in face, to form a wall for grouting, effectively prevents noting in subsequent pre support operates
The concrete slurry entered is leaked from face, improves the stability in tunnel during subsequent construction, ensure that tunnel is applied
The safety of work.
In embodiments of the present invention, the arrangement prebored hole hole position, and punch operation is carried out based on prebored hole hole position,
To obtain pre-pouring grout hole, including：The excavation contour line in tunnel is obtained, and along the arrangement preboring on the outside of the excavation contour line
Kong Kongwei, wherein the circumferential spacing of prebored hole hole position is 0.5-1m；With it is parallel with tunnel center line and with the horizontal elevation angle
Punch operation is carried out to prebored hole hole position for 5 ° -10 ° of angles, to obtain the pre-pouring grout hole.
Fig. 2 is referred to, in a kind of possible embodiment, in the stability of the face and face that enclose tunnel
After reaching construction requirement, construction personnel proceeds by pre support work.Construction personnel obtains the excavation contour line in the tunnel first,
And along the outside of excavation contour line arrangement prebored hole hole position, in embodiments of the present invention, between the circumferential direction of the prebored hole hole position
Away from for 0.5-1m, it is preferable that the circumferential direction spacing is 0.6m, is postponed in the cloth for completing hole position, construction personnel with tunnel center line
Angle that is parallel and being 5 ° -10 ° with the horizontal elevation angle, such as the angle (not shown) for being 8 ° with the elevation angle is to the prebored hole hole
Position carries out punch operation, to obtain pre-pouring grout hole.
In embodiments of the present invention, it by the outside along tunnel excavation line, drills and sets in front of the excavation face in tunnel
Advanced tubule is set, and by advanced tubule to carrying out grouting operation in front of the excavation face in tunnel, to stablize in excavation face
The surrounding rock stability in front plays the role of stable excavation face and sealing, improves and is applied in the poor tunnel of surrounding rock stability
The safety of constructing tunnel in work environment prevents the tunnel structure occurred during tunnel excavation from deforming and gushing sand, gush
The generation of the construction accidents such as water has ensured the personal safety of constructing tunnel personnel.Simultaneously by implementing the embodiment of the present invention, only need
It wants considerably less construction cost and construction equipment to can be achieved with the effect of lifting construction safety, therefore also subtracts for construction enterprises
Lack construction cost, improved construction benefit, improves construction efficiency.
In embodiments of the present invention, described that ductule is squeezed into the pre-pouring grout hole, and the ductule is fixed
Operation, including：The ductule is squeezed into the pre-pouring grout hole, and by the steelframe in the tail portion of the ductule and the tunnel
It is welded and fixed together.
In order to ensure that ductule can be stably held in pre-pouring grout hole during slip casting, without by during slip casting
The pressure of generation extrudes in pre-pouring grout hole or generation position deviation, and construction requirement is unable to reach so as to cause slip casting effect, generates
Potential security threat, therefore also need to that ductule is fixed before slip casting.Ductule after fixed simultaneously is also
The effect of lead pipe-shed support can be further functioned as, the stability of the country rock around tunnel can be further promoted, is improved pre-
The supporting effect of supporting improves the safety during tunnel excavation.
Further, refer to Fig. 3, in embodiments of the present invention, the ductule be diameter 42mm, thickness of pipe wall 3.5mm,
The front end of the steel pipe of length 3.0m, the ductule is cone-shaped, and the tail portion of the ductule is provided with the reinforcement of a diameter of 8mm
It binds round, the position of tail portion 1.0m or more described in distance is provided with the mud jacking hole of a diameter of 8mm, the pressure on the tube wall of the ductule
It starches hole to arrange in blossom type on the tube wall of the ductule, and the spacing in the mud jacking hole is 15cm.
In embodiments of the present invention, after obtaining pre-pouring grout hole, by a diameter of 42mm, thickness of pipe wall 3.5mm and length
It is squeezed into pre-pouring grout hole as ductule for the steel pipe of 3.0m, in order to make the country rock around the slurries and tunnel of injection preferably tie
Merge and generate better protecting effect, therefore is provided in blossom type apart from the position of tail portion 1.0m on the tube wall of the ductule
The mud jacking hole of a diameter of 8mm of arrangement, and the slurries in mud jacking hole are reversely flowed out because of the pressure in mud jacking hole in order to prevent
Mud jacking hole is not provided with mud jacking hole to cause a large amount of wastes of slurries in the position within the 1.0m of tail portion, to ensure
The spacing of best slip casting effect, the mud jacking hole is 15cm, meanwhile, the tail portion of ductule is provided with adding for a diameter of 8mm
Strong hoop, will be fixed to each other in being operated in order to subsequent construction between ductule and tunnel support structure and ductule, to be formed
Stronger supporting construction.
In embodiments of the present invention, described that grouting operation is carried out to the ductule, to obtain injected hole, including：By water
Double grouting serous fluids of the slurries as the grouting operation of muddy water glass；Slip casting behaviour is carried out to the ductule by grouting device
Make, wherein the grouting pressure of the grouting operation is 0.1-0.2Mpa；Obtain the injection speed during the grouting operation with
And grouting pressure；In the case where the injection speed reaches preset pressure value less than pre-set velocity value or the grouting pressure,
Stop the grouting operation.
In a kind of possible embodiment, construction personnel starts after squeezing into ductule in mud jacking hole to ductule
Grouting operation is carried out, in embodiments of the present invention, is noted using the grouting serous fluid of cement-silicate double slurries as grouting operations
Slurry, and by the control of the grouting pressure of grouting operation in the range of 0.1-0.2Mpa, during grouting operation, construction personnel
The injection speed and grouting pressure of grouting operation are obtained in real time, and judge the injection speed of current grouting operation whether less than default
Velocity amplitude or grouting pressure whether reach preset pressure value, such as current injection speed is 30L per minute, in one section of slip casting
Between after construction personnel find that injection speed is reduced to 10L per minute, be less than preset velocity amplitude, such as 12L per minute, therefore
Stop grouting operation；Or current grouting pressure is 0.2Mpa, construction personnel has found that grouting pressure increases after slip casting for a period of time
To 0.5Mpa, reach preset pressure value, such as 0.5Mpa, therefore stop grouting operation.
Further, in embodiments of the present invention, construction personnel can also use quantitative note during grouting operation
The mode of slurry carries out grouting operation to ductule, such as only inject total slurries amount to ductule every time 1/5 is used as single slurries
Amount, in each grouting operation, often injecting the slurries of single grouting amount, just to stop grouting operation primary, is confirming slip casting effect
After continue subsequent grouting operation.
In embodiments of the present invention, in addition to judging current slip casting according to injection speed or grouting pressure in grouting operation
Whether operation is completed, and can also judge whether current grouting operation is completed by the combination of injection speed and grouting pressure, with
And further, the slurries amount that each slip casting is further controlled by the method for component slip casting is noted so as to accurately control
The parameters in operating process are starched, excessive slip casting is prevented or cross construction accident caused by pressure grouting, ensure that in work progress
Safety, and ensure that the slip casting effect of grouting operation, stable supporting knot formd for the work of subsequent tunnel excavation
Structure, plays the effect of good stabilization and waterproof, further improves and carries out constructing tunnel in the tunnel of weak surrounding rock
Safety in the process has ensured the personal safety of constructing tunnel personnel.
In embodiments of the present invention, the supporting effect for examining the injected hole, to complete paying in advance before tunnel excavation
Shield, including：Before excavating the tunnel, the face is dug in examination, and obtains the infiltration situation of the face；In the palm
In the case that sub- face is without apparent infiltration, determines that the supporting effect of the injected hole is qualified, complete paying in advance before the tunnel excavation
Shield；In the case where the face has apparent infiltration, determine that the supporting effect of the injected hole is unqualified, again to the note
It starches hole and carries out grouting operation, to complete the pre support before the tunnel excavation.
The optional embodiment of the embodiment of the present invention is described in detail above in association with attached drawing, still, the embodiment of the present invention is simultaneously
The detail being not limited in the above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, disclosure of that of the embodiment of the present invention is equally should be considered as.
Claims (7)
1. a kind of light section per-fore pouring liquid with small pipe pays maintaining method in advance, which is characterized in that the maintaining method of paying in advance includes：
Close face；
It arranges prebored hole hole position, and punch operation is carried out based on prebored hole hole position, to obtain pre-pouring grout hole；
Ductule is squeezed into the pre-pouring grout hole, and the ductule is fixed；
Grouting operation is carried out to the ductule, to obtain injected hole；
The supporting effect for examining the injected hole, to complete the pre support before tunnel excavation.
2. according to claim 1 pay maintaining method in advance, which is characterized in that the closing face includes：
To the face gunite concrete to close the face, wherein the concrete thickness sprayed is 8-12cm.
3. according to claim 1 pay maintaining method in advance, which is characterized in that the arrangement prebored hole hole position, and based on described
Prebored hole hole position carries out punch operation, to obtain pre-pouring grout hole, including：
The excavation contour line in tunnel is obtained, and along the prebored hole hole position is arranged on the outside of the excavation contour line, wherein described
The circumferential spacing of prebored hole hole position is 0.5-1m；
Punching behaviour is carried out to prebored hole hole position with angle that is parallel with tunnel center line and being 5 ° -10 ° with the horizontal elevation angle
Make, to obtain the pre-pouring grout hole.
4. according to claim 1 pay maintaining method in advance, which is characterized in that it is described that ductule is squeezed into the pre-pouring grout hole,
And the ductule is fixed, including：
The ductule is squeezed into the pre-pouring grout hole, and the steelframe in the tail portion of the ductule and the tunnel is welded admittedly
It is scheduled on together.
5. according to claim 4 pay maintaining method in advance, which is characterized in that the ductule is diameter 42mm, thickness of pipe wall
The front end of the steel pipe of 3.5mm, length 3.0m, the ductule is cone-shaped, and the tail portion of the ductule is provided with a diameter of 8mm
Reinforced Hoop, the position of tail portion 1.0m or more described in distance is provided with the mud jacking hole of a diameter of 8mm on the tube wall of the ductule,
The mud jacking hole is arranged on the tube wall of the ductule in blossom type, and the spacing in the mud jacking hole is 15cm.
6. according to claim 1 pay maintaining method in advance, which is characterized in that it is described that grouting operation is carried out to the ductule,
To obtain injected hole, including：
Using the double slurries of cement-silicate as the grouting serous fluid of the grouting operation；
Grouting operation is carried out to the ductule by grouting device, wherein the grouting pressure of the grouting operation is 0.1-
0.2Mpa；
Obtain the injection speed and grouting pressure during the grouting operation；
In the case where the injection speed reaches preset pressure value less than pre-set velocity value or the grouting pressure, described in stopping
Grouting operation.
7. according to claim 1 pay maintaining method in advance, which is characterized in that the supporting effect for examining the injected hole,
To complete the pre support before tunnel excavation, including：
Before excavating the tunnel, the face is dug in examination, and obtains the infiltration situation of the face；
In the case where the face is without apparent infiltration, determines that the supporting effect of the injected hole is qualified, complete the tunnel
Pre support before excavation；
In the case where the face has apparent infiltration, determine that the supporting effect of the injected hole is unqualified, again to described
Injected hole carries out grouting operation, to complete the pre support before the tunnel excavation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393314.0A CN108590704A (en) | 2018-04-27 | 2018-04-27 | Light section per-fore pouring liquid with small pipe pays maintaining method in advance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393314.0A CN108590704A (en) | 2018-04-27 | 2018-04-27 | Light section per-fore pouring liquid with small pipe pays maintaining method in advance |
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| CN108590704A true CN108590704A (en) | 2018-09-28 |
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| CN201810393314.0A Pending CN108590704A (en) | 2018-04-27 | 2018-04-27 | Light section per-fore pouring liquid with small pipe pays maintaining method in advance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153367A (en) * | 2021-04-13 | 2021-07-23 | 西南交通大学 | Quicksand stratum reinforcing method with different water inflow amounts |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Application publication date: 20180928 |