CN203161250U - Deep hole grouting reinforcing system for tunnel - Google Patents
Deep hole grouting reinforcing system for tunnel Download PDFInfo
- Publication number
- CN203161250U CN203161250U CN 201320105906 CN201320105906U CN203161250U CN 203161250 U CN203161250 U CN 203161250U CN 201320105906 CN201320105906 CN 201320105906 CN 201320105906 U CN201320105906 U CN 201320105906U CN 203161250 U CN203161250 U CN 203161250U
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- Prior art keywords
- sleeve valve
- valve pipe
- tunnel
- row
- grouting
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Abstract
The utility model discloses a deep hole grouting reinforcing system for a tunnel, which is characterized by comprising sleeve valve pipes, wherein the sleeve valve pipes are arranged in an arch stratum of the tunnel within 180 degrees and distributed in eight rows; grouting reinforcing layers of the sleeve valve pipes are beyond a primary support structure of the tunnel within 2m; and the circumferential distances of the far ends and row distances of the sleeve valve pipes are 0.8m. The sleeve valve pipes are phi 48*3.2mm plastic sleeve valve pipes. The deep hole grouting sleeve valve pipes are distributed to form four circulations. With the adoption of phi 48 hard PVC (polyvinyl chloride) pipes, the system can bear the maximum pressure of greater than 3.0Mpa, and the sleeve valve pipes are distributed reasonably to reinforce the tunnel, so that the construction safety of buildings, structures and the tunnel around a project is ensured.
Description
Technical field
The utility model relates to a kind of tunnel deep hole grouting hardened system.
Background technology
Along with the development in city, in order to alleviate the crowded of aboveground space, the underground space is adding great development.In the city, geological conditions is complicated and changeable, and the above and below ground construction of structures is intricate, and is very responsive to the stratum sedimentation reaction.In the process of subway and the development of other underground engineering construction, tending to run into the situation that need pass through the above and below ground construction of structures, how to guarantee the safety of engineering periphery construction of structures and constructing tunnel, is the main difficult problem that construction faces.
The utility model content
Technical problem to be solved in the utility model provides a kind of tunnel deep hole grouting hardened system, has solved tunnel reinforcement, has guaranteed the problem of the construction of structures of engineering periphery and safety for tunnel engineering.
Technical problem to be solved in the utility model is achieved through the following technical solutions:
A kind of tunnel deep hole grouting hardened system is characterized in that: comprise sleeve valve pipe, described sleeve valve pipe is located at the 180 ° of scopes in stratum, arch, tunnel, and sleeve valve pipe is laid 8 rows altogether, and sleeve valve pipe grouting and reinforcing layer thickness is that the tunnel just props up the outer 2m scope of structure;
Described sleeve valve pipe far-end circumferential distance, row's spacing are 0.8m.
Described sleeve valve pipe adopts φ 48mm * 3.2mm plastics sleeve valve pipe.
Described first row's sleeve valve pipe is 12 ° horizontal by angle; Described second row's sleeve valve pipe is horizontal by 15 ° of angles; Described the 3rd row's sleeve valve pipe is horizontal by 18 ° of angles; Described the 4th row's sleeve valve pipe is horizontal by 22 ° of angles; Described the 5th row's sleeve valve pipe is horizontal by 28 ° of angles; Described the 6th row's sleeve valve pipe is horizontal by 35 ° of angles; Described the 7th row's sleeve valve pipe is horizontal by 45 ° of angles; Described the 8th row's sleeve valve pipe is horizontal by 59 ° of angles.
Described deep hole grouting sleeve valve pipe is laid four circulations altogether.
The utility model with respect to the beneficial effect of prior art is:
The slip casting of sleeve valve pipe is after slurries are through the grouting pump pressurization, enter Grouting Pipe by tube connector, gather sleeve valve pipe slip casting pipeline section, then by sleeve valve pipe, under pressure, pressurized slurries will produce along earth formation and fill, infiltration, densification, splitting is flowed, slurries form induration in the stratum, thereby reach the increase formation strength, reduce the purpose of stratum permeability, native system adopts Φ 48 hard PVC pipes, the maximum pressure that can bear is greater than 3.0Mpa, and by the reasonably laying of sleeve valve pipe, to tunnel reinforcement, guarantee engineering periphery construction of structures and safety for tunnel engineering.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 reinforces sectional side elevation for the utility model deep hole grouting
Among the figure: 1-tunnel, 2-sleeve valve pipe grouting and reinforcing layer, 3-first row's sleeve valve pipe, 4-the 8th row's sleeve valve pipe, 5-sleeve valve pipe, 6-wall for grouting
The specific embodiment
Shown in Fig. 1-2, a kind of tunnel deep hole grouting hardened system is characterized in that: comprise sleeve valve pipe, described sleeve valve pipe is located at the 180 ° of scopes in stratum, arch, tunnel, and sleeve valve pipe is laid 8 rows altogether, and sleeve valve pipe grouting and reinforcing layer thickness is that the tunnel just props up the outer 2m scope of structure;
Described sleeve valve pipe far-end circumferential distance, row's spacing are 0.8m.
Described sleeve valve pipe adopts φ 48mm * 3.2mm plastics sleeve valve pipe, adopts sleeve valve pipe retrusive grouting construction process.
Described first row's sleeve valve pipe is 12 ° horizontal by angle; Described second row's sleeve valve pipe is horizontal by 15 ° of angles; Described the 3rd row's sleeve valve pipe is horizontal by 18 ° of angles; Described the 4th row's sleeve valve pipe is horizontal by 22 ° of angles; Described the 5th row's sleeve valve pipe is horizontal by 28 ° of angles; Described the 6th row's sleeve valve pipe is horizontal by 35 ° of angles; Described the 7th row's sleeve valve pipe is horizontal by 45 ° of angles; Described the 8th row's sleeve valve pipe is horizontal by 59 ° of angles.
Described deep hole grouting sleeve valve pipe is laid four circulations altogether, and it is 10.25 meters that the every circulation of deep hole grouting performs length, excavates 8.25 meters, stays 2 meters as the wall for grouting of next circulation construction.
Slurries adopt single liquid cement paste, water/binder ratio be 1: 1,0.8: 1 two kinds.
The face shutoff is all carried out in each circulation, and face is only starched shutoff and adopted C25 linked network sprayed mortar, concrete thickness 300mm, and steel mesh reinforcement adopts φ 6.5@150 * 150mm.
Sleeve valve pipe grouting construction method is as follows:
1. setting-out location: mark at face by the basic point coordinate with total powerstation earlier that the 1.5m line is as location cloth point coordinates XY axle on tunnel center line, the springing line, again by these coordinate point, the method that adopts backguy and tape measure to measure is made boring position, hole.
2. rig boring:
1) boring vertical plane error≤5cm, bore angle≤± 1 degree, drilling depth 0.5～1.0m.
2) rig in place after, should make drilling machine platform smooth firm, before spudding in, utilize level gauge to make bore angle, and when creeping into 2m and after whenever add a joint drilling rod and all need proofread and correct the rig leveling.
3) in the boulder bed for preventing the hole of collapsing of holing, adopt sleeve pipe follow-up boring, finish boring after, install Grouting Pipe after, sleeve pipe is extracted.
4) for guaranteeing drilling quality, should note: 1. when boring, guarantee that rotating speed is even; 2. when changing drilling rod, drilling rod promotes should keep vertical with putting down, in order to avoid reaming.
5) after boring reaches projected depth, carry out borehole log.
3. install sleeve valve pipe
Insert sleeve valve pipe after boring finishes immediately, pipe is connected by the street corner of screw thread by every joint 3m, and pipe end adds the stifle sealing, and pipe seal is reliable.After the every joint of sleeve valve pipe connects, transfer to successively in the boring, at the bottom of the hole, guarantee as far as possible when transferring that the center of sleeve valve pipe overlaps with drill center.The upper end that guarantees sleeve valve pipe exposes face 10～20cm, entangles firm with pullover again, prevents that foreign material from entering in the pipe.
4. clear hole
Sleeve valve pipe installs plug, and to injecting clear water in the pipe, according to scene excessive slurry hole length (30cm/ section), whether segmentation inspection sleeve valve pipe slurry discharging hole is unimpeded.
5. notes sleeve shell material
Sleeve shell material is generally based on swell soil, cement is auxilliary the composition, is mainly used in sealing the annulus between sleeve valve pipe and the borehole wall, and slurries flee hither and thither when preventing from being in the milk, under the effect of rubber sleeve and stop grouting plug, force in the grout compartment scope and to squeeze broken sleeve shell material (being open loop) and enter the stratum.
The quality of sleeve shell material cast is to guarantee that slip casting is the key that guarantees the slip casting success or not, and its requirement can press off filler and carry out horizontal slip casting under certain pressure, can stop slurries to flow out the face of land along hole wall or tube wall when high-pressure slip-casting again.Sleeve shell material requires its fragility higher, and shrinkage is little, and mechanical strength is suitable, and the slurry that namely will prevent from going here and there is taken into account open loop again.
Mortar depositing construction is as follows:
Adopt KBY-70/16 type grouting pump that the slip casting operation is carried out on the stratum.Grouting mode adopts the retrusive segmenting slip casting, namely carries out slip casting by the outside segmentation of nose end in Grouting Pipe, each slip casting segment length 0.4～0.5m, has annotated this section after, retreat again and pour down one section, finish until the slip casting of full hole.Carry out detailed slip casting record in the slip casting process.
Slip casting employing water/binder ratio is single liquid cement paste of 1: 1,0.8: 1.According to on-the-spot slip casting test effect grouting serous fluid and proportioning are suitably adjusted.
1) pipe and two plug pipe connect and are put into sleeve valve pipe bottom in the slurry;
2) slurry output end of pipe top and grouting pump is connected in the slip casting, and the centre is connected to pressure meter;
3) by mixer preparation cement paste, the cement paste for preparing is injected in the plastic containers;
4) the slurry end that advances of grouting pump is put in the cement paste;
5) open hydraulic grouting pump and carry out slip casting, opening the gray scale of pouring water is 1: 1, enriching to 0.8 progressively in the mortar depositing construction: 1;
6) after grouting pressure reaches 0.8MPa and injection rate≤2L/min, keep more than 5 minutes, outer the pulling out of pipe in the slip casting carried out next section slip casting, every section length control of extracting is in 50cm.
For prevent that slurries from solidifying in the pipe in slip casting, the slurries in container all are injected into sleeve valve Guan Zhonghou, need pipe in the slip casting is washed.Method is that the slurry end that advances of hydraulic grouting pump is put in the container that the people fills clear water, and sleeve valve pipe is injected clear water, and the volume of injection equals the volume of the long-pending and hydraulic grouting pump turnover laitance coating pipe of slip casting interior tube body.
2. grouting sequence
Outer endless tube behind the endless tube in adopting is earlier jumped the method in hole at interval and is holed and slip casting.
3. clear hole
After each slip casting is finished, carry out immediately cleaning in the hole, the cleaning hose pipe is inserted the bottom of sleeve valve pipe, be pressed into clear water, water base of putting back to until the aperture is clean, moves up and down water pipe repeatedly at flushing process Chinese medicine, after the cement paste that pipe is interior is rinsed well, be convenient to follow-up slip casting and carry out.
Check situation according to slip casting effect, need carry out secondary grouting, can carry out second compensation slip casting according to grouting mode first.
4. the monitoring measure during slip casting
In the slip casting process, monitor the sedimentation situation of ground and piping lane closely, the trend as finding that ground or piping lane are lifted on having stops slip casting immediately.
5. slip casting requirement
The mortar depositing construction parameter will be tested affirmation according to the stratum actual conditions, and constantly improves adjustment in the construction at the scene, and in the slip casting process, in conjunction with the grouting pressure situation of change, on-the-spot dynamically the adjustment optimized grouting parameter.According to engineering experience in the past, in conjunction with the sand-pebble layer characteristic, preset grouting parameter and see the following form.
Claims (5)
1. tunnel deep hole grouting hardened system is characterized in that: comprise sleeve valve pipe, described sleeve valve pipe is located at the 180 ° of scopes in stratum, arch, tunnel, and sleeve valve pipe is laid 8 rows altogether, and sleeve valve pipe grouting and reinforcing layer thickness is that the tunnel just props up the outer 2m scope of structure.
2. tunnel as claimed in claim 1 deep hole grouting hardened system, it is characterized in that: described sleeve valve pipe far-end circumferential distance, row's spacing are 0.8m.
3. tunnel as claimed in claim 1 deep hole grouting hardened system, it is characterized in that: described sleeve valve pipe adopts φ 48mm * 3.2mm plastics sleeve valve pipe.
4. tunnel as claimed in claim 1 deep hole grouting hardened system, it is characterized in that: described first row's sleeve valve pipe is 12 ° horizontal by angle; Described second row's sleeve valve pipe is horizontal by 15 ° of angles; Described the 3rd row's sleeve valve pipe is horizontal by 18 ° of angles; Described the 4th row's sleeve valve pipe is horizontal by 22 ° of angles; Described the 5th row's sleeve valve pipe is horizontal by 28 ° of angles; Described the 6th row's sleeve valve pipe is horizontal by 35 ° of angles; Described the 7th row's sleeve valve pipe is horizontal by 45 ° of angles; Described the 8th row's sleeve valve pipe is horizontal by 59 ° of angles.
5. tunnel as claimed in claim 1 deep hole grouting hardened system, it is characterized in that: described deep hole grouting sleeve valve pipe is laid four circulations altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320105906 CN203161250U (en) | 2013-03-08 | 2013-03-08 | Deep hole grouting reinforcing system for tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320105906 CN203161250U (en) | 2013-03-08 | 2013-03-08 | Deep hole grouting reinforcing system for tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161250U true CN203161250U (en) | 2013-08-28 |
Family
ID=49022442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320105906 Expired - Fee Related CN203161250U (en) | 2013-03-08 | 2013-03-08 | Deep hole grouting reinforcing system for tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161250U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405410A (en) * | 2014-12-04 | 2015-03-11 | 海南大学 | Construction structure and construction method for strengthening stratum at end of shield tunnel |
| CN104790982A (en) * | 2015-04-09 | 2015-07-22 | 深圳市永鑫建筑工程集团有限公司 | Enclosed mud for underground excavation tunnel ultra-deep hole grouting |
| CN105909265A (en) * | 2016-06-12 | 2016-08-31 | 中铁十九局集团轨道交通工程有限公司 | Heaving-prevention retrusive deep-hole grouting system and method for passing through existing shield tunnel |
| CN109139051A (en) * | 2018-09-28 | 2019-01-04 | 中铁二十二局集团轨道工程有限公司 | A kind of tunnel grouting structure and construction |
-
2013
- 2013-03-08 CN CN 201320105906 patent/CN203161250U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405410A (en) * | 2014-12-04 | 2015-03-11 | 海南大学 | Construction structure and construction method for strengthening stratum at end of shield tunnel |
| CN104790982A (en) * | 2015-04-09 | 2015-07-22 | 深圳市永鑫建筑工程集团有限公司 | Enclosed mud for underground excavation tunnel ultra-deep hole grouting |
| CN104790982B (en) * | 2015-04-09 | 2018-08-14 | 深圳市永鑫建筑工程集团有限公司 | Casing material for ultra-deep hole grouting of underground excavated tunnel |
| CN105909265A (en) * | 2016-06-12 | 2016-08-31 | 中铁十九局集团轨道交通工程有限公司 | Heaving-prevention retrusive deep-hole grouting system and method for passing through existing shield tunnel |
| CN105909265B (en) * | 2016-06-12 | 2018-02-09 | 中铁十九局集团轨道交通工程有限公司 | Pass through the anti-protuberance retrusive deep hole grouting system and method for existing shield tunnel |
| CN109139051A (en) * | 2018-09-28 | 2019-01-04 | 中铁二十二局集团轨道工程有限公司 | A kind of tunnel grouting structure and construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 |