CN108729438A - A kind of administering method in karst area channel - Google Patents
A kind of administering method in karst area channel Download PDFInfo
- Publication number
- CN108729438A CN108729438A CN201810523221.5A CN201810523221A CN108729438A CN 108729438 A CN108729438 A CN 108729438A CN 201810523221 A CN201810523221 A CN 201810523221A CN 108729438 A CN108729438 A CN 108729438A
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- curtain
- hole
- karst
- water
- administering method
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The invention discloses a kind of administering methods in karst area channel：Karst corridor position is detected using low-frequency vibration detector；Cloth hole is carried out according to the Karst corridor position detected and is crept into；Cobble is filled in the preceding hole of curtain and curtain metapore；Tripping in Grouting Pipe and perfusion mortar in the preceding hole of curtain and curtain metapore；With high-pressure pump injection cream slurry in curtain string holes；Finally cement mortar is injected in hole on curtain line, and control grouting pressure is in 0.5~1MPa, until until gushing out without slurries and water at solution cavity leak, the improvement in completion karst area channel.The present invention can quickly and accurately detect channel position using low-frequency vibration technology, cloth hole is optimized again and backfills slip casting, 95% or more can be reached by carrying out water blockoff and Anti-seeping technology, water burst sealing ratiod to the karst area channel under river channels, and rock stratum permeability rate can be down within 5Lu.
Description
Technical field
The invention belongs to a kind of quick spies in karst area channel under building engineering construction method more particularly to river channels
It looks into and backfill grouting method.
Background technology
Carbonate formation, up to 3,460,000 square kilometres, accounts for the 1/3 of territory total area, due to earth's surface in China's gross area
The corrosion that water and underground water generate jointly forms the karst of variform, and it is broken that rock impermeabilisation is greatly reduced
Bad ability, to directly affect the safety of building.A kind of important means of the slip casting as karst region Anti-seeping technology, extensively
It is general to be applied in various engineering constructions, and there has been more mature industry technology experience.But to strong karst under river channels
Area is in the milk, and is always that project cost is uncontrollable, the maximum problem of technical difficulty.How the control of effective grouting amount is being set
It counts in the rock crack within curtain thickness, to reduce the invalid diffusion of slurries, improves construction efficiency, reduce slurries cost, more
Good reduction project cost, is the developing direction of Grouting engineering technology.
Quickly, it is to administer the most important condition in channel, and compare in detection at present to be accurately detected seepage in underground channel position
More ripe method has dc resistivity, natural electric field method, transient electromagnetic method, Ground Penetrating Radar method, wave velocity method, temperature field
Method, tracer method etc., instrument used by these methods is very expensive, and the leakage passage position that detected is not smart
Really, deviation reaches 10 meters or more；And it is substantially directly drills on curtain line solution cavity position in the prior art, filler aggregate
Injection cement grout carries out leak stopping afterwards, and the method can lead to aggregate and slurries due to the problems such as solution cavity channel is big, water velocity is fast
It is flushed away, slurries are spread in vain, cause construction efficiency slow, and cost increases, serious can not to form water block curtain；And it is in the milk
Frequently with the side such as granular materials filling+cement-silicate two-shot grouting, quick-hardening paste grouting, high-water material grouting, cloth bag grouting
There is the problems such as project cost is high, the construction period is long, construction effect is difficult to ensure in method, these methods.
Invention content
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind is suitable for the quick of karst area channel under river channels and detects and backfill slip casting, especially suitable for being located at strong Karst Area
The large surface mine excavated Water outburst treatment or strong Karst Area reservoir Tunnel gushing treatment method.
In order to solve the above technical problems, technical solution proposed by the present invention is：
A kind of administering method in karst area channel, includes the following steps：
(1) Karst corridor position is detected using low-frequency vibration detector；When subsurface flow is through underpass, 1- will produce
The low-frequency vibration of 8Hz, the low-frequency vibration generated can cause to insert the magnet vibration in magnetic-suspension wave detector on the ground, to
Cutting magnetic line generates electric current and voltage difference, after what amplification of amplifier and filtering, shows over the display, in turn
Judge solution cavity channel position；It carries out detecting solution cavity position by the low-frequency vibration generated when solution cavity using flow, increase
Frequency band of detection width, improves detectivity, it is easier to detect solution cavity position；
(2) cloth hole is carried out according to the Karst corridor position detected and crept into；
(3) cobble is filled in the preceding hole of curtain and curtain metapore；Using catapult Fast Filling cobble, in-channel water is reduced
Big water-permeable passage is become small penetrating passage by flow velocity degree；
(4) tripping in Grouting Pipe and perfusion mortar in the preceding hole of curtain and curtain metapore；Water velocity is further decreased, will be moved
Water becomes opposite hydrostatic；
(5) hole starches to form certain thickness water block curtain with high-pressure pump injection cream on curtain line；Relative to using low pressure
The diffusion and loss of slurries can be effectively reduced by pouring into cement grout；
(6) finally cement mortar is injected in hole on curtain line, and control grouting pressure is in 0.5~1MPa, until at the leak of channel
Until no slurries and water are gushed out (gap of filling curtain), the improvement in karst area channel is completed.
Above-mentioned administering method, it is preferred that in the step (2), cloth hole refers in the Karst corridor curtain by curtain line
Before, drilled respectively with drilling machine on behind the scenes and curtain line, in boring procedure, encounter unexpected drilling rod and fall apparent or ventilation pressure
Shi Youshui or mud are gushed out, then the position is solution cavity.
Above-mentioned administering method, it is preferred that in the step (2), the brill of 75~110mm of diameter is drilled through in drilling process
Hole, whole bore dia are not less than 75mm, are followed up using casing after pore-forming.
Above-mentioned administering method, it is preferred that in the step (4), slip casting pore interior diameter is not less than 55mm, and wall thickness is not small
In 5mm.
Above-mentioned administering method, it is preferred that described using the pressure injection mortar of 0.5~2MPa in the step (4)
Mortar is gravity flowing levelling mortar.
Above-mentioned administering method, it is preferred that in the step (5), for control grouting pressure in 2~10MPa, grouting pressure is steady
Terminate when being scheduled on 2-3MPa.
Above-mentioned administering method, it is preferred that in the step (5), cream slurry is early strong, Anti-erosion clay Cement paste,
Mainly by quality proportioning 50: (50~150): (0~300): (50~100): (80~250): the cement of (0.1~0.3), sand,
Stone, clay, water and additive composition.
The present invention is quickly found out solution cavity channel by low-frequency vibration technology, and cloth hole is optimized, and is first passing through curtain
The solution cavity channel anterior locations and back location of curtain line drill respectively, using sling Fast Filling cobblestone, reduce in channel
Big water-permeable passage is become small penetrating passage by water velocity；Again the hole on curtain line using high pressure be filled cream slurry or
Mortar can effectively reduce the diffusion and loss of slurries, so as to effectively form one relative to cement grout is poured into using low pressure
Determine the water block curtain of thickness, finally injects the gap that cement grout fills this thickness curtain, prevent from seeping water.
Compared with the prior art, the advantages of the present invention are as follows：
(1) present invention can quickly and accurately detect channel position using low-frequency vibration technology, then be carried out to cloth hole excellent
Change and combine suitable backfill grouting mode so that construction economy, convenience and construction effect of the invention, environmental-protecting performance etc.
Aspect has apparent superiority；Meanwhile water blockoff and Anti-seeping technology, water burst envelope are carried out to the karst area channel under river channels
Stifled rate can reach 95% or more, and rock stratum permeability rate can be down within 5Lu.
(2) present invention solves progress slip casting in Karst corridor development area under river channels, and there are groundwater velocities soon, karst
Cavity is big, karst is complicated, the technical barriers such as slow, injection speed is slow, technical difficulty is big are searched in channel.
Specific implementation mode
To facilitate the understanding of the present invention, it more comprehensively, is meticulously retouched below in conjunction with preferred embodiment to inventing to do herein
It states, but protection scope of the present invention is not limited to following specific examples.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention's
Protection domain.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1：
Thunder God mausoleum mining area limestone deposit, it is loosely-packed layer and Ordovician limestone, field that place, which nearby discloses stratum as the 4th,
Mainly there are the tomographies such as F2, F1-1, F1-2, F1-3 in ground, explore the maximum solution cavity high 23.5m in hole, the dispersion of distribution reaches 30m, arranges day
Water is up to 90000m3/ d, while nearby Secondary Geological Hazards also constantly occur in place.To ensure that ore is normally exploited, mine
Area periphery level of ground water reach ordinary water level, place nearby because drawing water caused by geological disaster reduction or do not have, need to mining area into
Row Water outburst treatment.
Method using the present invention carries out water blockoff processing, is as follows：
(1) accurate location of Karst corridor first is detected (using subsurface flow through underpass with low-frequency vibration detector
When, generate low-frequency vibration, low-frequency vibration cause the magnet being inserted in the detector on ground vibrate, cutting magnetic line generate electric current and
Voltage difference shows data after amplifying by amplifier in display screen)；
(2) it uses drilling machine before curtain on the Karst corridor by curtain line, carry out prospect hole respectively on behind the scenes and curtain line and bore
Into；During prospect hole, there are water or mud to gush out when encountering apparent unexpected drilling rod whereabouts or ventilation pressure, then the position is solution cavity,
Further determine that cavern depth；The drilling of diameter 91mm is drilled through in drilling process, whole bore dia is not less than 75mm, is used after pore-forming
Casing follows up；
(3) before curtain line curtain, backstage Kong Xianyong catapults launch the cobble of a diameter of 15-40mm, Fast Filling karst
Channel reduces in-channel water flow velocity degree；
(4) (slip casting pore interior diameter is not less than 55mm to tripping in Grouting Pipe, and wall thickness is not before curtain line curtain, in hole behind the scenes again
Less than 5mm), grouting pipeline is connected, grouting pump, pressure gauge, valve etc. are connected, injects Self-leveling sand with about pressure 1MPa
Slurry, further decreases flow velocity, and dynamic water in channel is made to become opposite hydrostatic；
(5) hole uses high-pressure pump implantation quality proportioning for cement on curtain line: sand: stone: clay: water: additive=50:
50~150: 0~300: 50~100: 80~250: 0.1~0.3 cream slurry, grouting pressure is in 8MPa or so, when pressure stability exists
2~3MPa stops injection cream slurry；Cement mortar is finally injected, control grouting pressure is in 1MPa or so, until without slurry at the leak of channel
Until liquid and water are gushed out, Karst corridor is blocked completely and forms certain curtain thickness；Then use same method under
One channel carries out water blockoff processing.
After being constructed using this method, the level of ground water absolute altitude outside curtain line rises to+37~38m by+25m, reaches
Pit do not excavate before level of ground water；Water yield is by 90000m3/ d drops to 2000m3/ d reaches contract requirement and is less than
10000mm3/d.Observation by half a year and follow-up ore extraction, water yield has no significant change in pit.
Embodiment 2：
Southern ferry crossing power station dike section water content of soil is high, and it is apparent to dissipate leaching phenomenon, and many places levee body and slope foot have seepage flow, farmland after dike
It is interior a few place's piping occur, carry silt secretly, water yield constantly increases；There is leakage clear water phenomenon in many places, and seepage place levee body occurs
The hole of collapsing of deep 1.5m, diameter 1.5m or so seriously injure Seawall safety stabilization.For the safe operation of dyke, it is necessary to carry out
Effective leak stopping processing.
Method using the present invention carries out water blockoff processing, is as follows：
(1) accurate location of leak paths first is detected (using subsurface flow through underpass with low-frequency vibration detector
When, generate low-frequency vibration, low-frequency vibration cause the magnet being inserted in the detector on ground vibrate, cutting magnetic line generate electric current and
Voltage difference shows data after amplifying by amplifier in display screen)；
(2) it uses drilling machine before curtain on the leak paths by curtain line, carry out prospect hole respectively on behind the scenes and curtain line and bore
Into；During prospect hole, there are water or mud to gush out when encountering apparent unexpected drilling rod whereabouts or ventilation pressure, then the position is solution cavity,
Further determine that cavern depth；The drilling of diameter 91mm is drilled through in drilling process, whole bore dia is not less than 75mm, is used after pore-forming
Casing follows up；
(3) before curtain line curtain, backstage Kong Xianyong catapults throw the cobble of a diameter of 10-30mm, Fast Filling leak is logical
Road reduces in-channel water flow velocity degree；
(4) (slip casting pore interior diameter is not less than 55mm to tripping in Grouting Pipe, and wall thickness is not before curtain line curtain, in hole behind the scenes again
Less than 5mm), grouting pipeline is connected, grouting pump, pressure gauge, valve etc. are connected, injects Self-leveling sand with about 1MPa pressure
Slurry, further decreases flow velocity, and dynamic water in channel is made to become opposite hydrostatic；
(5) hole uses high-pressure pump implantation quality proportioning for cement on curtain line: sand: stone: clay: water: additive=50:
50~150: 0~100: 100~300: 80~250: 0.1~0.3 cream slurry, grouting pressure work as pressure stability in 8MPa or so
Stop injection cream slurry in 2~3MPa；Finally inject cement mortar, control grouting pressure in 1MPa or so, until at the leak of channel without
Until slurries and water are gushed out, channel is blocked completely and forms certain curtain thickness.
Water injection test is carried out after Practical Completion, as a result shows that its infiltration coefficient is respectively less than 1.0 × 10-4Cm/s, packer permeability test
Permeability rate is equal<5Lu meets scheme requirement, and slurries calculus is more in inspection hole core, strong bonding, grout curtain water plugging effect
Preferably.
Claims (7)
1. a kind of administering method in karst area channel, which is characterized in that include the following steps：
(1) Karst corridor position is detected using low-frequency vibration detector；
(2) cloth hole is carried out according to the Karst corridor position detected and crept into；
(3) cobble is filled in the preceding hole of curtain and curtain metapore；
(4) tripping in Grouting Pipe and perfusion mortar in the preceding hole of curtain and curtain metapore；
(5) hole high-pressure pump injects cream slurry on curtain line；
(6) finally cement mortar is injected in hole on curtain line, and control grouting pressure is in 0.5~1MPa, until without slurry at the leak of channel
Until liquid and water are gushed out, the improvement in karst area channel is completed.
2. administering method as described in claim 1, which is characterized in that in the step (2), cloth hole refers to by curtain line
Karst corridor curtain before, drilled respectively with drilling machine on behind the scenes and curtain line.
3. administering method as described in claim 1, which is characterized in that in the step (2), diameter 75 is drilled through in drilling process
The drilling of~110mm, whole bore dia are not less than 75mm, are followed up using casing after pore-forming.
4. administering method as described in claim 1, which is characterized in that in the step (4), slip casting pore interior diameter is not less than
55mm, wall thickness are not less than 5mm.
5. administering method as described in claim 1, which is characterized in that in the step (4), using the pressure of 0.5~2MPa
Perfusion mortar, the mortar are gravity flowing levelling mortar.
6. administering method as described in claim 1, which is characterized in that in the step (5), control grouting pressure 2~
10MPa, grouting pressure stabilization terminate in 2-3MPa.
7. administering method as described in claim 1, which is characterized in that in the step (5), cream slurry is early strong, Anti-erosion
Clay Cement paste, mainly by quality proportioning 50: (50~150): (0~300): (50~100): (80~250): (0.1~
0.3) cement, sand, stone, clay, water and additive composition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810523221.5A CN108729438B (en) | 2018-05-28 | 2018-05-28 | Treatment method for karst area channel |
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| CN201810523221.5A CN108729438B (en) | 2018-05-28 | 2018-05-28 | Treatment method for karst area channel |
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| CN108729438B CN108729438B (en) | 2021-01-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610427A (en) * | 2018-11-22 | 2019-04-12 | 中铁第勘察设计院集团有限公司 | Karst foundation visits the slip casting construction method for filling that combination, slurries are controllable, monitor in real time |
| CN110042840A (en) * | 2019-05-24 | 2019-07-23 | 中水北方勘测设计研究有限责任公司 | A kind of curtain-grouting method of steep dip bulk mosaic texture rock mass |
| CN111139853A (en) * | 2019-12-24 | 2020-05-12 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN111424695A (en) * | 2020-04-17 | 2020-07-17 | 中国水利水电第八工程局有限公司 | Seepage-proofing and leakage-stopping method for deep-buried karst pipeline |
| CN112523170A (en) * | 2020-11-25 | 2021-03-19 | 上海勘测设计研究院有限公司 | Seepage-proofing treatment method for deep-buried karst seepage channel of reservoir |
| CN113174929A (en) * | 2021-05-08 | 2021-07-27 | 中铁上海设计院集团有限公司 | Karst building foundation composite reinforcement method under flowing water condition |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610427A (en) * | 2018-11-22 | 2019-04-12 | 中铁第勘察设计院集团有限公司 | Karst foundation visits the slip casting construction method for filling that combination, slurries are controllable, monitor in real time |
| CN110042840A (en) * | 2019-05-24 | 2019-07-23 | 中水北方勘测设计研究有限责任公司 | A kind of curtain-grouting method of steep dip bulk mosaic texture rock mass |
| CN111139853A (en) * | 2019-12-24 | 2020-05-12 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN111139853B (en) * | 2019-12-24 | 2021-03-30 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN111424695A (en) * | 2020-04-17 | 2020-07-17 | 中国水利水电第八工程局有限公司 | Seepage-proofing and leakage-stopping method for deep-buried karst pipeline |
| CN111424695B (en) * | 2020-04-17 | 2022-01-07 | 中国水利水电第八工程局有限公司 | Seepage-proofing and leakage-stopping method for deep-buried karst pipeline |
| CN112523170A (en) * | 2020-11-25 | 2021-03-19 | 上海勘测设计研究院有限公司 | Seepage-proofing treatment method for deep-buried karst seepage channel of reservoir |
| CN113174929A (en) * | 2021-05-08 | 2021-07-27 | 中铁上海设计院集团有限公司 | Karst building foundation composite reinforcement method under flowing water condition |
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