CN108625897A - The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel - Google Patents

The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel Download PDF

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Publication number
CN108625897A
CN108625897A CN201810210852.1A CN201810210852A CN108625897A CN 108625897 A CN108625897 A CN 108625897A CN 201810210852 A CN201810210852 A CN 201810210852A CN 108625897 A CN108625897 A CN 108625897A
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water
pressure
tunnel
drilling
artificial drainage
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CN108625897B (en
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张霄
段崇豪
张庆松
李相辉
安琪祎
郝彭帅
王子昂
尹占超
刘啸
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Shandong University
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Shandong University
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • E21F16/02Drainage of tunnels

Abstract

The present invention relates to a kind of artificial drainage pressure releasing method of hydrous fluids on the outside of tunnel, which includes the following steps:One, large-scale water guide pipeline or water enrichment area above and below around tunnel are detected;Two, united-row drilling is designed;Three, drilling construction and down tube;Four, water fracturing is pressed;The present invention is suitable for level of ground water can be because of the larger stratum of rainfall eustasy, and tunnel perimeter uses the project situation of drapery injected, nothing or seldom osculum.It can effectively realize that rainfall infiltration water is drained rapidly using artificial drainage pressure releasing method of the present invention, level of ground water will not be caused to maintain high water level for a long time and tunnel support is made to bear high pressure, the problem of preventing from causing level of ground water to rise suddenly and sharply because of heavy showers such as heavy rains, supporting being caused to destroy.Design is scientific and reasonable for artificial drainage pressure releasing method of the present invention, and constructing operation is convenient, has good function and effect, is worthy of popularization.

Description

The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel
Technical field
The present invention relates to a kind of artificial drainage pressure releasing method of hydrous fluids on the outside of tunnel, be mainly used in level of ground water by The tunnel built in the stratum that heavy showers is affected belongs to tunnelling technical field.
Background technology
The case where encountering unfavorable geology with the continuous development of Tunnel Engineering, during constructing tunnel is on the increase.By multiple The influence of miscellaneous geological tectonic conditions and topography and geomorphology factor, China's constructing tunnel often pass through the poor stratum of geological conditions. Under the comprehensive function of itself loose crushing of underground water, crustal stress and tunnel surrounding, it is susceptible to tunnel in work progress and collapses, Engineering project disasters and the problem such as the prominent mud of water burst and supporting cracking, to prevent such safety for tunnel engineering hidden danger, the methods of grouting and reinforcing Gradually application is continuously available during constructing tunnel.However, during carrying out grouting and reinforcing to tunnel surrounding, slurries Compacted filling effect makes the underground water crack passage in original stratum close, and it is unsmooth to be likely to result in underground water circulation.
When tunnel can be because of the larger stratum of precipitation eustasy by level of ground water, in the feelings for the heavy showers such as heavy rain occur Under condition, since ground water discharge is unsmooth in the stratum, huge water pressure is by long duration of action on tunnel surrounding and supporting.Especially During its constructing tunnel, tunnel excavation and the construction of tunnel curtain will be caused original by the stratum subsurface flow entire crack gap Underground aquaporin is truncated, and curtain-grouting substantially increases the impermeability of country rock so that the stratum underground water more row of being difficult to It lets out, in prominent chance precipitation, rainfall infiltration water is constantly accumulated in the earth formation, and is difficult to drain, and the water pressure of generation will be made for a long time It is destroyed with tunnel support structure on tunnel support and country rock, is easy to cause, or even causes the geological disasters such as the prominent mud of water burst.
Currently, being drained to underground water in view of the above-mentioned problems, conducting drainage pipeline can be used, to prevent to tunnel support Potential threat, but long-term drainage will cause harmful effect to ambient enviroment, be easy to cause the higher stratum arid of topography, near Level of ground water decline etc., and the underground water being discharged can not generally efficiently use, and will cause the waste of groundwater resources.On such ground Under the conditions of matter, it is necessary to create a kind of artificial drainage pressure releasing method, ensure that rainfall infiltration water is fast in the case of prominent chance precipitation Speed excretion will not cause level of ground water to maintain high water level for a long time, meanwhile, reduce the adverse effect to environment to the greatest extent.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of artificial drainage pressure releasing method of hydrous fluids on the outside of tunnel.
Technical scheme is as follows:
The artificial drainage pressure releasing method of hydrous fluids, includes the following steps on the outside of a kind of tunnel:
Step 1: large-scale water guide pipeline or water enrichment area above and below around detection tunnel:
Using transient electromagnetic method, highly dense resistivity method, Seismic Imaging Method and geological radar method to containing on the outside of blow section tunnel Aqueous condition carries out comprehensive survey, and it is logical to detect main water enrichment area and rich water crack, comprehensive analysis tunnel on the outside of blow section tunnel Cross the distribution feelings of country rock intact condition, underground large size water guide pipeline and water enrichment area near underground water arterial drainage conduit region Condition;
Step 2: design united-row drilling:
According to position, spacing and the complete shape of neighbouring country rock of the large-scale water guide pipeline and water enrichment area determined in step 1 Condition designs united-row drilling, determines tunnel-side drilling starting point, bore angle and drilling depth, drilling borehole bottom location spacing is not More than 10m, ensure that hydraulic connection can occur under high-pressure hydraulic slabbing action;
Step 3: drilling construction and down tube:
Determine that the bore position of design drills according to step 2, drilling is constructed using protrusive, often creeps into one section of inspection One section is looked into, is rectified a deviation in time;Down tube operation is and then carried out after one drilling construction, waits for carrying out next brill again after down tube It constructs in hole;Under effective pressure pipe road take full-sleeve, water-proofing treatment is done on the outside of pipe sleeve, prevents water filling is counter from gushing;
Step 4: pressure water fracturing:
The drilling compartment of terrain that step 3 has been constructed is divided into two batches, first to first borehole pressurisation water filling, passes through pressure gauge Reading monitoring in real time, pressure gradually rises to the water injection pressure value of setting after playing pressure, stops water filling at this time;It drills again to second batch Carry out pressure water injection, rise pressure after pressure gradually rise until splitting perforation, then rapidly decline and the low-pressure that gradually tends towards stability, Pressure no longer rises, and pressure fracturing is completed.
Preferably, further include preparation of construction process before step 1:Understand the geological state in pressure water injection location, packet The intensity for including hydraulic pressure, wall-rock crack development degree, the property of crack inner stuffing and tunnel support and grouting curtain, according to upper Geological state is stated, determines the water injection pressure range for causing country rock to cleave, and water injection pressure value is set with this.
Preferably, in step 3, before drilling construction, design parameter is first pressed on tunnel tunnel face wall for grouting by survey crew Bore position is marked with red paint, and indicates hole number successively.
Preferably, it in step 3, is drilled using HL650 type rock drilling machines, is controlled with drilling machine head and the tail coordinate difference The vertical angle and horizontal angle that drilling construction advances.
Preferably, in step 3, it refers to using airtight waterproof set using a full set of pipe construction that water-proofing treatment is done on the outside of pipe sleeve Pipe, whole casing retaining wall.
Preferably, in step 3, before down tube, packer permeability test, examination plus hydraulic pressure first are carried out to required steel pipe of constructing The water injection pressure value set to 1.2 times, stands 45min, checks that whether there is or not seepy questions for steel pipe, is repeatedly performed 3 packer permeability tests.This Design is advantageous in that, examines the high pressure resistant intensity of constructing device and whether there is or not water leakage situations, ensure construction quality.
Preferably, in step 4, when drilling hole amount is odd number, Large Underground water guide pipeline and water enrichment area be will be close to Two drillings point carry out pressure water injection in second batch.
The beneficial effects of the present invention are:
The present invention is suitable for level of ground water can be because of the larger stratum of rainfall eustasy, and tunnel perimeter uses curtain-grouting The project situation of water blockoff, nothing or seldom osculum.Rainfall infiltration can effectively be realized using artificial drainage pressure releasing method of the present invention Water is drained rapidly, and level of ground water will not be caused to maintain high water level for a long time and tunnel support is made to bear high pressure, prevented because of heavy rain etc. Heavy showers causes level of ground water to rise suddenly and sharply, the problem of causing supporting to destroy.Design is scientific and reasonable for artificial drainage pressure releasing method of the present invention, Constructing operation is convenient, has good function and effect, is worthy of popularization.
Description of the drawings
Fig. 1 is the tunnel sectional view in the present invention;
Fig. 2 is the drilling longitudinal section in the present invention;
Fig. 3 is that first drilling high pressure water injection cleaves schematic diagram in the present invention;
Fig. 4 is that mesohigh water filling of the present invention cleaves final effect schematic diagram;
Wherein:1-road, 2-tunnel contour lines, 3-surrounding rock consolidation areas, 4-cause calamity water sources, 5-underground hydrous fluids, The splitting drilling of 6-high pressures, 7-high-pressure hydraulics cleave water producing fractures.
Specific implementation mode
The present invention will be further described by way of example and in conjunction with the accompanying drawings, but not limited to this.
Embodiment 1:
As shown in Figures 1 to 4, the present embodiment provides a kind of artificial drainage pressure releasing method of hydrous fluids on the outside of tunnel, the party Method specifically includes following steps:
Step 1: large-scale water guide pipeline or water enrichment area above and below around detection tunnel:
Using transient electromagnetic method, highly dense resistivity method, Seismic Imaging Method and geological radar method to containing on the outside of blow section tunnel Aqueous condition carries out comprehensive survey, and it is logical to detect main water enrichment area and rich water crack, comprehensive analysis tunnel on the outside of blow section tunnel Cross the distribution feelings of country rock intact condition, underground large size water guide pipeline and water enrichment area near underground water arterial drainage conduit region Condition;
In the step, using four kinds of transient electromagnetic method, highly dense resistivity method, Seismic Imaging Method and geological radar method method lists It is solely detected, is mutually authenticated by these four detection methods respectively, the main water enrichment area of detection can be improved and rich water is split The precision of gap.
Step 2: design united-row drilling:
According to position, spacing and the complete shape of neighbouring country rock of the large-scale water guide pipeline and water enrichment area determined in step 1 Condition designs united-row drilling, determines tunnel-side drilling starting point, bore angle and drilling depth, drilling borehole bottom location spacing is not More than 10m, ensure that hydraulic connection can occur under high-pressure hydraulic slabbing action;
Step 3: drilling construction and down tube:
The bore position of design is determined according to step 2, and design parameter is first pressed in tunnel tunnel face wall for grouting by survey crew On with red paint mark bore position, and indicate hole number successively;
Then it drills according to hole number, is drilled using HL650 type rock drilling machines successively, with drilling machine head and the tail coordinate difference Value come control drilling construction advance vertical angle and horizontal angle.Drilling is constructed using protrusive, often creeps into one section of one section of inspection, and When rectify a deviation, and then carry out down tube operation after a drilling construction, wait for carrying out again by hole sequence after down tube next Drilling construction;Under effective pressure pipe road take full-sleeve, water-proofing treatment is done on the outside of pipe sleeve, using a full set of pipe construction, is used Airtight waterproof casing, whole casing retaining wall, prevents water filling is counter from gushing.
Step 4: pressure water fracturing:
The drilling compartment of terrain that step 3 has been constructed is divided into two batches, hole number is divided into first for odd number, and hole number is even number Be divided into second batch.It first to first borehole pressurisation water filling, is monitored in real time by pressure gauge reading, pressure gradually rises after playing pressure To the water injection pressure value of setting, stop water filling at this time;It drills again to second batch and carries out pressure water injection, pressure gradually rises after playing pressure Until splitting perforation, then declines rapidly and the low-pressure that gradually tends towards stability, pressure no longer rises, pressure fracturing is completed, finally Effect is as shown in Figure 4.
Embodiment 2:
The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel, this method operating procedure is as described in Example 1, no It is with place:Further include preparation of construction process before step 1:Understand the geological state in pressure water injection location, including water Pressure, the intensity of wall-rock crack development degree, the property of crack inner stuffing and tunnel support and grouting curtain, according to above-mentioned Matter situation determines the water injection pressure range for causing country rock to cleave, and sets water injection pressure value with this.
Embodiment 3:
The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel, this method operating procedure is as described in Example 1, no It is with place:In step 3, before down tube, packer permeability test, examination plus hydraulic pressure first are carried out to 1.2 to required steel pipe of constructing The water injection pressure value of setting again stands 45min, checks that whether there is or not seepy questions for steel pipe, is repeatedly performed 3 packer permeability tests.Before down tube, It examines the high pressure resistant intensity of constructing device and whether there is or not water leakage situation, ensure entire construction quality.
Embodiment 4:
The artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel, this method operating procedure is as described in Example 1, no It is with place:In step 4, when drilling hole amount is odd number (as shown in Figure 3 and Figure 4), Large Underground water guide pipeline will be close to And two drillings point of water enrichment area carry out pressure water injection in second batch.Such design is taken, to first middle section After drilling carries out pressure water injection splitting, splitting gap again drills to second batch carry out pressure water injection splitting in this way to two side diffusions When, it can preferably be connected with first splitting crack, reach more preferably splitting perforation effect.

Claims (7)

1. the artificial drainage pressure releasing method of hydrous fluids on the outside of a kind of tunnel, which is characterized in that include the following steps:
Step 1: large-scale water guide pipeline or water enrichment area above and below around detection tunnel:
It is watery to containing on the outside of blow section tunnel using transient electromagnetic method, highly dense resistivity method, Seismic Imaging Method and geological radar method Condition carries out comprehensive survey, detects main water enrichment area and rich water crack, comprehensive analysis tunnel on the outside of blow section tunnel and passes through ground The distribution situation of country rock intact condition, underground large size water guide pipeline and water enrichment area near lower water arterial drainage conduit region;
Step 2: design united-row drilling:
According in step 1 determine large-scale water guide pipeline and water enrichment area position, spacing and neighbouring country rock intact condition, United-row drilling is designed, determines that tunnel-side drilling starting point, bore angle and drilling depth, drilling borehole bottom location spacing are no more than 10m ensures that hydraulic connection can occur under high-pressure hydraulic slabbing action;
Step 3: drilling construction and down tube:
Determine that the bore position of design drills according to step 2, drilling is constructed using protrusive, is often crept into one section and is checked one Section is rectified a deviation in time;Down tube operation is and then carried out after one drilling construction, waits for that carrying out next drilling after down tube again applies Work;Under effective pressure pipe road take full-sleeve, water-proofing treatment is done on the outside of pipe sleeve, prevents water filling is counter from gushing;
Step 4: pressure water fracturing:
The drilling compartment of terrain that step 3 has been constructed is divided into two batches, first to first borehole pressurisation water filling, passes through pressure gauge reading Monitoring in real time, pressure gradually rises to the water injection pressure value of setting after playing pressure, stops water filling at this time;It drills and carries out to second batch again Pressure water injection, rise pressure after pressure gradually rise until splitting perforation, then rapidly decline and the low-pressure that gradually tends towards stability, pressure No longer rise, pressure fracturing is completed.
2. artificial drainage pressure releasing method as described in claim 1, which is characterized in that further include that construction is accurate before step 1 Standby process:The geological state for understanding pressure water injection location, includes the property of hydraulic pressure, wall-rock crack development degree, crack inner stuffing The intensity of matter and tunnel support and grouting curtain determines the water injection pressure model for causing country rock to cleave according to above-mentioned geological state It encloses, and water injection pressure value is set with this.
3. artificial drainage pressure releasing method as described in claim 1, which is characterized in that in step 3, before drilling construction, first by surveying Amount personnel mark bore position on tunnel tunnel face wall for grouting by design parameter with red paint, and indicate hole number successively.
4. artificial drainage pressure releasing method as described in claim 1, which is characterized in that in step 3, utilize HL650 type rock drills Machine drills, and the vertical angle and horizontal angle of drilling construction advance are controlled with drilling machine head and the tail coordinate difference.
5. artificial drainage pressure releasing method as described in claim 1, which is characterized in that in step 3, waterproof is done on the outside of pipe sleeve Processing refers to using a full set of pipe construction, using airtight waterproof casing, whole casing retaining wall.
6. artificial drainage pressure releasing method as described in claim 1, which is characterized in that in step 3, before down tube, first to applying The required steel pipe of work carries out packer permeability test, and the water injection pressure value that examination plus hydraulic pressure are set to 1.2 times stands 45min, checks steel pipe Whether there is or not seepy questions, are repeatedly performed 3 packer permeability tests.
7. artificial drainage pressure releasing method as described in claim 1, which is characterized in that in step 4, when drilling hole amount is odd number When, two drillings point that will be close to Large Underground water guide pipeline and water enrichment area carry out pressure water injection in second batch.
CN201810210852.1A 2018-03-14 2018-03-14 Artificial drainage pressure relief method for water-rich area outside tunnel Active CN108625897B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050709A (en) * 2006-04-03 2007-10-10 郭国政 High water pressure releasing and blocking mining method for mining area
CN102536240A (en) * 2012-01-17 2012-07-04 河南省煤层气开发利用有限公司 Method for preventing rock burst by adopting high-pressure fracturing
CN103758570A (en) * 2014-01-14 2014-04-30 中国矿业大学 Method for controlling high mine pressure of open-air roadway by hydraulic fracturing
CN104358558A (en) * 2014-09-05 2015-02-18 许进鹏 Old dead zone detection method based on fracturing principle
CN104594898A (en) * 2014-11-10 2015-05-06 山东科技大学 Hard top plate waterflooding pressure relief treatment method
CN205714281U (en) * 2016-04-29 2016-11-23 中国水利水电第五工程局有限公司 A kind of tunnel excavation top diffusing concentrates water draw-off
CN107060834A (en) * 2017-06-26 2017-08-18 山东大学 Grout injection control technique is oozed in drainage slowly under back rich water broken condition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050709A (en) * 2006-04-03 2007-10-10 郭国政 High water pressure releasing and blocking mining method for mining area
CN102536240A (en) * 2012-01-17 2012-07-04 河南省煤层气开发利用有限公司 Method for preventing rock burst by adopting high-pressure fracturing
CN103758570A (en) * 2014-01-14 2014-04-30 中国矿业大学 Method for controlling high mine pressure of open-air roadway by hydraulic fracturing
CN104358558A (en) * 2014-09-05 2015-02-18 许进鹏 Old dead zone detection method based on fracturing principle
CN104594898A (en) * 2014-11-10 2015-05-06 山东科技大学 Hard top plate waterflooding pressure relief treatment method
CN205714281U (en) * 2016-04-29 2016-11-23 中国水利水电第五工程局有限公司 A kind of tunnel excavation top diffusing concentrates water draw-off
CN107060834A (en) * 2017-06-26 2017-08-18 山东大学 Grout injection control technique is oozed in drainage slowly under back rich water broken condition

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