CN103912290A - Grouting method used for vibration isolating and denoising outside subway tunnel segments - Google Patents
Grouting method used for vibration isolating and denoising outside subway tunnel segments Download PDFInfo
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- CN103912290A CN103912290A CN201410128144.5A CN201410128144A CN103912290A CN 103912290 A CN103912290 A CN 103912290A CN 201410128144 A CN201410128144 A CN 201410128144A CN 103912290 A CN103912290 A CN 103912290A
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Abstract
The invention belongs to the technical field of civil engineering and relates to a grouting method used for vibration isolating and denoising outside subway tunnel segments. On the basis of vibration isolating and denoising materials, the grouting method incudes construction processes of selecting grouting holes, burying grouting pipes, determining proportion of vibration isolating and denoising resin and catalyst, injecting the proportioned resin and the catalyst into the grouting holes, washing machines and tools, stopping pumping and detaching an injection gun for secondarily grouting every three to five tunnel segments, and an integral isolator is formed to isolate vibration spreading. By the grouting method, the purpose of vibration isolating and denoising is effectively achieved, loose structure of the surrounding rock can be changed in time, integral strength of the rock is improved, construction is safe and reliable, construction speed is accelerated, normal replacement of working surfaces is guaranteed, shield excavation can be applied when passing the fault and the abnormal areas, even in the area with large vibration affection, and the grouting method is worthy of popularization and practical.
Description
Technical field
The invention belongs to technical field of civil engineering, relate to a kind of grouting method for subway sectional tunnel vibration insulation and noise reduction.
Background technology
Urban track traffic is a kind of large conveying quantity, safety, quick, punctual, convenient, the comfortable desirable vehicles, and has low energy consumption, of low pollution, safety, the function such as comfortable, in solution urban transport problems, has special status and effect.
On the other hand, along with growth in the living standard, people are more and more stricter as compared with the past to the requirement of quality of life, the ambient vibration problem that fast-developing track traffic causes, and oneself is through having caused the public's kickback.This is mainly often by the dense district of the stream of people in city, business district, scenic spot and the scientific and technological park etc. that building stands in great numbers because of subway line, its top or close region are likely just residential building, precision instrument room, ancient architecture groups etc. are to vibration and the more sensitive area of noise ratio, in the time of subway train operation, building or resident will be subject to its caused ground or the vibration on earth's surface and the impact of noise, and in building, resident and instrument also can be subject to the impact of secondary vibration and quadratic noise.Especially subway becomes the rear vibration producing of net and noise effects to rise becomes a kind of very important public hazards, and this impact reaches 20 hours every day, annual 365 days.All there is the destruction and the complaint of resident along the line on its impact life that cause building along the line due to vibration and the noise of train in a lot of countries in the world.
Vibration main source is: (1) railcar, as vehicle is beated, rolling, the defective steering stabilizer etc. of wheel on rail adds pulsatile impact to track; (2) wheel, if wheel decentraction, wheel are to the disturbance that all can increase vibration such as overweight of imbalance, the defect of wheel surface, axle load; (3) rail system, local gap under supporting as non-homogeneous in rail, rail crack, different ballast aggregate railway roadbed supporting, sleeper.Therefore, determine that the factor of vibrating mainly contains: train speed, vehicle weight, rail type, track structure (whether having adopted vibration isolation measure), liner structure type, tunnel rock-soil layer character, edpth of tunnel etc. around.
People are general adopts following several method to reduce Subway Vibration: (1) adopts heavy rail (more than 60kg/m), and adopts gapless track, the speed of service of appropriate reduction train as far as possible.(2) alleviate the unsprung mass of vehicle, avoid vehicle and track to produce resonance, can reduce like this oscillation intensity 10-15dB(3) suitably increase the buried depth of subway, make vibration amplitude add high attenuation with distance; Adopt heavier tunnel structure also can reduce Oscillation Amplitude; (4) adopt suitable railway roadbed and track structure form, increase the elasticity of track, set up the rubber mat plate that quiet stiffness factor is less, vibration attenuation reaches 10-15dB.Although above vibration insulation and noise reduction measure obtains certain effect, for effective and economy vibration insulation and noise reduction measure easily, the present invention reasonably supplements and development beyond doubt.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention aims to provide a kind of grouting method for subway sectional tunnel vibration insulation and noise reduction, be that subway is executed to the active vibration isolation noise reduction measure that taked in the construction stage in vibration sensing area, can reduce preferably and disturb the generation of problem with the people because of disturbing residents of causing of vibration and noise.
Concrete scheme is as follows:
For a grouting method for vibration insulation and noise reduction outside subway tunnel section of jurisdiction, it is characterized in that comprising the following steps:
(1) choose injected hole along tunneling direction;
(2) bury Grouting Pipe underground at the injected hole place choosing;
(3) determine the proportioning of vibration insulation and noise reduction material resin and catalyzer;
(4) turn on pump slip casting is injected injected hole by the vibration insulation and noise reduction material resin preparing together with catalyzer;
(5) rinse facility, current injected hole is stopped to slip casting, move to next injected hole, until all injected holes are completed to slip casting.
The proportioning of vibration insulation and noise reduction material resin and catalyzer is: volume ratio is 1: 1, and weight ratio is 1: 1.17 simultaneously.
The described condition that stops slip casting is: when grouting pressure reaches setting value A, A is greater than 5MPa and is less than 8MPa, or the injection rate of spillage amount=pump.
Vibration insulation and noise reduction material is a kind of low viscosity, bi-component is synthesized macromolecule---poly-imines glue fat material, while adopting high pressure pouring to carry out water blockoff, together with resin is mixed with catalyzer time, reaction or chance water generates expand, itself react or the polynary netted close elastomeric feature of foaming generation, when it is pushed by high pressure, be injected into rock-soil layer or distress in concrete (under High Pressure, can make the closed crack of rock-soil layer open), can extend until by all cracks (comprising the imperceptible crack of naked eyes and the crack of again opening under High Pressure) filling along rock-soil layer or distress in concrete.While reinforcing rock-soil layer in shutoff crack, also corresponding diminishing (expansion multiple is 2～4 times) of product expansion rate when rock-soil layer is not moisture, high pressure thrust is pressed into vibration insulation and noise reduction material and is full of all gaps, reaches leak-stopping object, and finished product resistance to compression is between 25～38Mpa; In the time meeting after water (water mixing), produce associated reaction, expand, under the effect of the bulbs of pressure, produce secondary osmotic pressure (expansion multiple is 20～25 times), high pressure thrust and secondary osmotic pressure are pressed into vibration insulation and noise reduction material and are full of all gaps, thereby reach leak-stopping object, finished product resistance to compression is between 15～25Mpa.
In shield tunneling process, shield structure is pushed ahead and is departed from shield tail, between outside, section of jurisdiction and surrounding soil, produce the building gap of 10cm-15cm, the present invention carries out secondary after-teeming by vibration insulation and noise reduction material by the distance of every 3-5 section of jurisdiction and starches to realize a complete vibration isolator, and then realizes the object of vibration isolation.
Beneficial effect
This method of the present invention has the engineering property effect of optimizations such as vibration isolation, vibration damping, noise reduction, effectively makes the reducing noise 5-15dB that drives a vehicle.
1) safety.Vibration insulation and noise reduction material has height bonding force and good mechanical performance, inject after weak stratum, low viscosity mixtures keeps liquid condition several seconds, permeate tiny crack, expand and bond, reinforce adjoining rock relaxation zone effectively, makes it to become entirety, improve the integrated carrying ability of country rock, thereby control being caving of lane top board.
2) rapidity.Do not note before vibration insulation and noise reduction material, owing to taking out, top is serious, every day drilling depth less than 1.5m, shipment amount is large, note vibration insulation and noise reduction material finishes after 2h, starts driving, more than daily footage reaches 3.6m, has ensured that the normal of work plane advances fast.3) in the construction of injection vibration insulation and noise reduction material, there is following advantage: (1) technique is simple, easy and simple to handle.Multi-functional grouting pump volume is little, lightweight, presses the wind source that is used as power, normal operating two people.(2) special-purpose sealing device is reasonable in design.There is pad sealer one end, and in the time starting slip casting, slurries expand closely sealed to sealer and hole wall in sealer, continues slip casting in the time that slurries pressure reaches certain value, and pad is washed open, and slurries just inject rock stratum through Grouting Pipe.Seal simply, save time compared with other method.(3) two kinds of raw materials of vibration insulation and noise reduction material and catalyzer are used respectively plastics barreled, carry convenient in carrying, are convenient to underground construction equipment and raw material convenient transportation, can one-time-reach-place, can one-time-reach-place, and do not need special equipment and tubing.(4) construction equipment is simple, and (5) easy to operate can construct in the four seasons, and pollution-free, after this material reaction, can generate inertia foam; (6) expense is reasonable, has very high expansion rate, reaches maximum effect, economical rationality with little consumption.(7) life-span long, the construction period is short.
Facts have proved that vibration insulation and noise reduction material resin is a kind of chemical consolidation material of novelty.It can change in time country rock loose structure, improve rock mass bulk strength, construction safety reliable, accelerated speed of application, ensured normally taking over of work plane, not only shield driving is applied in the time that tomography is crossed exceptions area excessively, also can apply this technology adopting under the region that existing vibration effect is larger, it is the practical technique being worthy to be popularized.
In addition the invention provides a kind of construction method of reinforcing weak surrounding rock, can improve the bulk strength of rock mass.
Brief description of the drawings
Accompanying drawing 1, the inventive method flow chart.
Detailed description of the invention:
For making above-mentioned purpose of the present invention, feature and advantage can be more understandable, below in conjunction with detailed description of the invention, embodiments of the invention are described in further detail.
Hole arrangement parameters: towards tunneling direction, every 3-5 shield duct piece slip casting once, can regulate hole arrangement parameters according to demand.
(1) bury Grouting Pipe underground at the injected hole place choosing;
(2) determine the proportioning of vibration insulation and noise reduction material resin and catalyzer, meet volume ratio is 1: 1 simultaneously, and weight ratio 1: 1.17.
(4) connect filling gun and grouting pump with high-pressure rubber pipe, use small-size multifunction Pneumatic grouting pump, adopt double-liquid grouting system, the vibration insulation and noise reduction material resin preparing is injected to injected hole together with catalyzer.
(3) according to rock property, determine that grouting pressure is 5MPa～8MPa, when grouting pressure reaches 5MPa～8MPa or occurs large area spillage, when the injection rate of spillage amount=pump, complete the slip casting to current injected hole.Grouting sequence: from bottom to top order is carried out.This reinforced roadway 20m, totally 10 circulations.
Every hole grouting amount is determined according to grouting pressure, when construction, must strictly control grouting pressure,
The problem occurring in construction: thoroughly do not cause plugging with water flushing tool.The measure of taking: every circulation is cleaned one time all pipelines with machine oil after having noted, and guarantees that pipeline noresidue slurries solidify.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. for a grouting method for vibration insulation and noise reduction outside subway tunnel section of jurisdiction, it is characterized in that comprising the following steps:
(1) choose injected hole along tunneling direction;
(2) bury Grouting Pipe underground at the injected hole place choosing;
(3) determine the proportioning of vibration insulation and noise reduction material resin and catalyzer;
(4) turn on pump slip casting is injected injected hole by the vibration insulation and noise reduction material resin preparing together with catalyzer;
(5) current injected hole is stopped to slip casting, move to next injected hole, until all injected holes are completed to slip casting.
2. a kind of grouting method for vibration insulation and noise reduction outside subway tunnel section of jurisdiction according to claim 1, is characterized in that: the proportioning of vibration insulation and noise reduction material resin and catalyzer is: volume ratio is 1: 1, and weight ratio is 1: 1.17 simultaneously.
3. a kind of grouting method for vibration insulation and noise reduction outside subway tunnel section of jurisdiction according to claim 1, it is characterized in that: the described condition that stops slip casting is: when grouting pressure reaches setting value A, A is greater than 5MPa and is less than 8MPa, or the injection rate of spillage amount=pump.
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| CN201410128144.5A CN103912290B (en) | 2014-03-31 | 2014-03-31 | Grouting method used for vibration isolating and denoising outside subway tunnel segments |
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| CN201410128144.5A CN103912290B (en) | 2014-03-31 | 2014-03-31 | Grouting method used for vibration isolating and denoising outside subway tunnel segments |
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| CN103912290B CN103912290B (en) | 2017-01-25 |
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Cited By (5)
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| CN104695974A (en) * | 2015-03-06 | 2015-06-10 | 北京城建设计发展集团股份有限公司 | Shock absorbing method and structure for rail traffic underground engineering |
| CN104847384A (en) * | 2015-05-28 | 2015-08-19 | 北京工业大学 | Vibration and noise reduction method for subway intersectional tunnels |
| CN107165655A (en) * | 2017-06-29 | 2017-09-15 | 山东科技大学 | A kind of backfilling grouting method in the driving for complete-section tunnel boring machine |
| CN107642367A (en) * | 2017-09-11 | 2018-01-30 | 广州大学 | A kind of shield tunnel isolation structure and its construction method |
| CN113622944A (en) * | 2021-08-31 | 2021-11-09 | 广州大学 | Design method of tunnel structure and vibration isolation layer for isolating subway vibration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107165655A (en) * | 2017-06-29 | 2017-09-15 | 山东科技大学 | A kind of backfilling grouting method in the driving for complete-section tunnel boring machine |
| CN107642367A (en) * | 2017-09-11 | 2018-01-30 | 广州大学 | A kind of shield tunnel isolation structure and its construction method |
| CN113622944A (en) * | 2021-08-31 | 2021-11-09 | 广州大学 | Design method of tunnel structure and vibration isolation layer for isolating subway vibration |
| CN113622944B (en) * | 2021-08-31 | 2023-05-23 | 广州大学 | Tunnel structure for isolating subway vibration and design method of vibration isolation layer |
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| CN103912290B (en) | 2017-01-25 |
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