CN108005662A - A kind of processing method of underground water seal cave depot bank area geology crushed zone - Google Patents
A kind of processing method of underground water seal cave depot bank area geology crushed zone Download PDFInfo
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- CN108005662A CN108005662A CN201711295807.2A CN201711295807A CN108005662A CN 108005662 A CN108005662 A CN 108005662A CN 201711295807 A CN201711295807 A CN 201711295807A CN 108005662 A CN108005662 A CN 108005662A
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- crushed zone
- geology
- slip casting
- grouting
- hole
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Abstract
The present invention relates to a kind of processing method of underground water seal cave depot bank area geology crushed zone, comprise the following steps：Geology crushed zone feature is determined with reference to geology and exploration hole data；Determine grouting serous fluid, technique and termination criteria, pre-pouring grout is carried out to geology crushed zone and its periphery Rock And Soil by injected hole, water-stop curtain is formed and reinforces crushed zone, carry out detection of grouting effects；After Blasting Excavation to geology crushed zone exposure, cavern periphery a certain range crushed zone Rock And Soil is excavated and changed and fills out concrete；Slip casting is carried out to the contact surface between concrete and rock mass, between concrete and concrete, the slurries identical with pre-pouring grout, technique, termination criteria and effect detection standard can be used；The surrouding rock deformation of matter crushed zone top layer setting in situ monitors after the completion for the treatment of support construction, and judges whether to need to strengthen bolt-spary supports.The present invention can solve the water blockoff of bank area geology crushed zone and reinforce problem, and step is simple, easy construction, and investment cost saves, processing time is short.
Description
Technical field
The present invention relates to geology crushed zone processing technology field in underground water seal cave depot technology, underground engineering, especially relate to
A kind of and processing method of underground water seal cave depot bank area geology crushed zone.
Background technology
Tomography and crushed zone are common bad geological phenomenons during cavern excavation.As a rule, fault disruption zone
Band has there are low-intensity, the feature such as yielding, water penetration is big, water-resistance is poor with its both sides rock mass on physico mechanical characteristic
Significant difference.For underground water seal cave depot bank area, the technical problem as caused by crushed zone mainly has water curtain system water
Seal effect reduction, oil gas is leaked along crushed zone, crushed zone Rock And Soil caves in.It is then desired to a kind of be directed to underground water seal cave depot
The processing method of bank area geology crushed zone.
The processing method common to geology crushed zone has freezing, high-pressure rotary jet grouting pile method, slip casting method both at home and abroad at present, afterwards
By applying anchor pole, gunite concrete or disposing prefabricated concrete lining etc. to be subject to supporting.1. freezing, is to utilize manually system
Refrigeration technique makes the water in crushed zone build-up ice, and Jiang Yan becomes integral with water.So as to increase crushed zone strength and stability, isolation ground
Lower water, to carry out underground engineering digging operation.Freezing is a kind of temperature pier technology, generally requires a large amount of power equipments simultaneously
Easily restricted by external condition.2. high-pressure rotary jet grouting pile method, is to be mixed on cement mortar penetrating stratum with Rock And Soil with the nozzle of high-pressure rotary
Close, form the cement stabilization body of lap connection.High-pressure rotary jet grouting pile method requires height to mechanical equipment and operative skill, and easily causes useless
The unordered discharge of slurries.3. slip casting method, is injected hole or fabricated device by drilling through, will be some using modes such as hydraulic pressure, air pressures
In curable slurries injection Rock And Soil, so that ground and the grout curing rear physical mechanics for forming entirety, improving Rock And Soil
Property.Slip casting method operation can at any time be carried out, adjusted at any time and water reinforcement effect is relatively preferable.
But for underground water seal cave depot bank area, above-mentioned three kinds of water reinforcement treatment technologies are all infeasible, Wu Fabao
Demonstrate,prove stability, permeability and the sealing requirements of geology crushed zone.The present invention by pre-pouring grout, excavate crushed zone and change and fill out coagulation
The technical steps such as soil, contact surface slip casting, deformation monitoring, can thoroughly solve the water blockoff and reinforcement criteria of bank area geology crushed zone.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of underground water seal cave depot
The processing method of bank area geology crushed zone, can overcome existing geology crush water blockoff sealing that tape processing method is difficult to ensure that and
Stable problem is reinforced, so as to meet the needs of underground water seal cave depot engineering construction.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of processing method of underground water seal cave depot bank area geology crushed zone, comprises the following steps：
S1：Cave depot area three-dimensional geological model is built, and obtains the position of geology crushed zone；
S2：Multiple slip casting inclined holes are drilled through on the face before the geology crushed zone position that distance is estimated and carry out pre-pouring grout,
The multiple slip casting inclined hole is crossed geology and is crushed in center is radial towards geology crushed zone tilt distribution, the end of slip casting inclined hole
Band certain distance；
S3：After geology crushed zone is excavated and is exposed, geology crushed zone region is excavated, formwork and pours coagulation
Soil；
S4：Interface between the concrete poured to the interface between cast-in-place concrete and country rock, segmentation carries out contact slip casting；
S5：The supporting construction determined by surrounding rock supporting construction design method is constructed, and treats geology crushed zone and neighboring area branch
After protection structure is constructed, in situ matter crushed zone top layer sets country rock to restrain and settlement monitoring measure, according to deformation value and
Rate of deformation evaluates grouting consolidation effect and judges whether to strengthen bolt-spary supports.
In the step S1, at the 15-30m faces before the geology crushed zone position that distance is estimated, with advance
Matter exploration hole, verifies and determines position, thickness, occurrence and the crushed zone Rock And Soil engineering properties of geology crushed zone.
The hole count and face area in the advance geology exploration hole are proportional, and the diameter in each advance geology exploration hole is not
Less than 50mm.
If advance geology exploration hole coring, the information that evaluation obtains geology crushed zone is carried out to drilling core；If
Not coring, then record drilling rate, water yield, water outlet colouring information.
In the step S2, the end of slip casting inclined hole crosses geology crushed zone and is no less than 10m；The tilt distribution of slip casting inclined hole
So that grouting serous fluid excavates 7-9m beyond the wall of hole along cavern's radial diffusion to pre-；Grouting serous fluid dilation angle is calculated by 2-3m, and
Ensure adjacent slip casting inclined hole reinforcing scope overlap joint and without slip casting blind area.
In the step S2, the method for drilling holes and late grouting includes：Protrusive segmenting slip casting method, specify region to strengthen slip casting
Method and the long once grouting method of full section.
The slurries of slip casting are selected according to Rock And Soil void characteristics, and the species of grouting serous fluid includes ordinary cement slurry, water
Mud-bentonite slurry, superfine cement slurry and chemicals slurries.
The concentration of slurry of slip casting process is converted with termination criteria：
1. during slip casting when grouting pressure remains unchanged and injection rate persistently reduces, or injection rate is constant and pressure persistently rises
Gao Shi, does not change the ratio of mud；
2. when grouting serous fluid injection rate reaches more than 500L, and no changes have been made or changes not notable for grouting pressure and slip casting flow velocity
When, change the dense level-one ratio of mud or the thick slurry more sticky than current grouting serous fluid；
3. repeat the 2. to walk until grouting pressure reaches PsDuring+1.5MPa, or when slip casting flow velocity is less than 2L/min, when stablizing one section
Between after stop slip casting, wherein PsIt is using hydrostatic pressure in the hole that manometry is used after antipriming closing drilling.
Slip casting effect is detected after slip casting, is specially：Inspection hole is additionally drilled through in slip casting region, according to inspection hole
Middle water burst flow velocity judges slip casting effect：
①Q<Q1, slip casting effect is good, it is not necessary to continues slip casting, inspection hole is backfilled with cement mortar；
②Q1<Q<Q2, by encrypting injected hole, expansion range of grouting, selecting thick slurry to re-start slip casting, slip casting is completed
Afterwards, detect again；
③Q>Q2, drill and first seal, after determining water burst concrete condition, detect using measures of preventing water and again；
Wherein, Q is water yield, Q1Take 0.01 L/min/m, Q2Take 0.1 L/min/m.
The step S3 is specially：
After geology crushed zone is excavated and is exposed, according to geology crushed zone steadiness, stop driving in due course；
Using construction machinery artificial or equipped with hydraulic shock destroyer, radially geology crushed zone 3-5m depth models are excavated along cavern
Enclose interior Rock And Soil；
Using plank sheathing or steel form, along hole wall to installation form outside the geology crushed zone that has excavated；
Cast-in-place intensity is not less than the concrete of C25 at the geology crushed zone hollowed out, and is stirred evenly using vibrating head.
Compared with prior art, the present invention has the following advantages：
（1）At present there is no underground water seal cave depot geology crush tape processing method in terms of patent.The present invention by pre-pouring grout, excavate
Crushed zone simultaneously changes and fills out the technical steps such as concrete, contact surface slip casting, deformation monitoring, can meet the water blockoff of bank area geology crushed zone
And reinforcement criteria, the operation phase leakproofness and long-time stability problem of solution geology crushed zone.
（2）Operating procedure of the present invention is simple, and required equipment is all underground engineering commonly used equipment, and site operation is easy, feasible
Property it is high, the expense that can reduce investment outlay and shorten processing time.
（3）By being drilled through on face in the radial slip casting inclined hole in center, to guarantee over the ground in the method for the present invention
The a certain range of Rock And Soil of matter crushed zone and its periphery applies water blockoff, reinforces pre-pouring grout, forms water-stop curtain and reinforces geology and breaks
Broken band.
Brief description of the drawings
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is bank area geology crushed zone feature schematic diagram in the embodiment of the present invention；
Fig. 3 is face pre-pouring grout borehole pattern in the embodiment of the present invention.
In figure, 1- has excavated cavern's abutment wall；2- faces；3- slip casting inclined holes；4- geology crushed zones；5- does not excavate cavern side
Wall；6- caverns central axes；Slip casting inclined hole end profile line at 7- geology crushed zones；Grouting serous fluid is spread at 8- geology crushed zones
Outside boundary line；9- geology crushed zones excavate boundary line outside scope.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, a kind of processing method of underground water seal cave depot bank area geology crushed zone 4 comprises the following steps：
S1：Survey data and cave depot construction time geological mapping data in detail based on geology, structure cave depot area three-dimensional geological model, is inferred to
The output position of the geology crushed zones 4 such as tomography, the intensive crushed zone in joint.In 4 position of geology crushed zone estimated apart from bank area
At 15-30m faces 2 before, using advance geology exploration hole, the position of verification and definite geology crushed zone 4, thickness, production
Shape and crushed zone Rock And Soil engineering properties.The hole count in advance geology exploration hole can flexibly increase and decrease according to 2 area of face, generally
3, the diameter in each advance geology exploration hole is not less than 50mm.
If advance geology exploration hole coring, there should be special geological personnel to carry out evaluation acquisition geology to drilling core and crush
With 4 details；If not coring, the information such as drilling rate, water yield, water outlet color should be recorded in detail.
In the present embodiment, detection hole number takes 3, and aperture takes 50mm.4 position of geology crushed zone is obtained away from face 2
Axis 22m, thickness 2m, 339 ° of occurrence, 90 ° of ∠（Using cavern's axis as direct north）, crushed zone Rock And Soil be fault breccia.
Crushed zone schematic diagram is shown in Fig. 2.
S2：A certain number of slip casting inclined holes 3 are drilled through on face 2, to guarantee to geology crushed zone 4 and its periphery one
The Rock And Soil for determining scope applies water blockoff, reinforces pre-pouring grout, forms water-stop curtain and reinforces geology crushed zone 4.Such as Fig. 2 and Fig. 3 institutes
Show, 3 length of slip casting inclined hole is no less than 10m to cross geology crushed zone 4；Radial centered on injected hole arrangement form, it is tilted
Angle is so that grouting serous fluid excavates 8m beyond the wall of hole along cavern's radial diffusion to pre-；Grout spreading range is calculated by 3m, and really
Adjacent injected hole reinforcing scope overlap joint is protected without slip casting blind area, inlet well arrangement is shown in Fig. 3, and it is exactly grouting serous fluid to mark 8 in Fig. 3
The outside boundary line obtained by dilation angle 2m, mark 9 is exactly corresponding outside boundary line when excavating crushed zone 4m depth.Based on geology
4 geometry of crushed zone and mechanical characteristic, reasonably select grouting serous fluid, grouting process, slip casting termination criteria and detection of grouting effects mark
Standard, after grout cures also tackling slip casting effect is detected, specific as follows：
Grouting serous fluid should be selected according to Rock And Soil void characteristics, mainly selected ordinary cement slurry, cement-bentonite slurry, surpassed
Thin cement mortar, chemicals slurries（Such as nano silicon dioxide etc.）.Since rock cranny has millimetre-sized opening width, therefore choose
Cement mortar.
Grouting method mainly includes following three kinds in step 2：
1. protrusive segmenting slip casting method：First section slip casting should use more sticky rapid hardening slurries and be made using relatively low grouting pressure
Its is rapidly solidified, reduces running pulp, grout leaking；Next segment length is drilled through after the completion of first section, and it is straight using normal grouting pressure and slurries
Grown to full section is completed.
2. region is specified to strengthen grouting method：Using the Grouting Pipe that mould bag is carried at the 5m of end, reach specified region
When first pass through ductule slip casting carried out to mould bag and strut it to fit closely with country rock, then to specifying region to use high slip casting pressure
Power, big injection rate carry out reinforcing slip casting.
3. the long once grouting of full section：It can be used for the drilling that quality of surrounding rock is preferable, water amount of seepage is few, by injected hole once
It is drilled into unified slip casting after full section is grown.This uses protrusive segmenting slip casting method.
The concentration of slurry of slip casting process is converted with termination criteria：
1. during slip casting when grouting pressure remains unchanged and injection rate persistently reduces, or injection rate is constant and pressure persistently rises
Gao Shi, should not change the ratio of mud；
2. when certain grade of grouting serous fluid injection rate reaches more than 500L, and no changes have been made or changes and does not show for grouting pressure and slip casting flow velocity
During work, the dense level-one ratio of mud or other thick slurries more sticky than current grouting serous fluid should be changed；
3. repeat the 2. to walk until grouting pressure reaches PsDuring+1.5MPa, or when slip casting flow velocity is less than 2L/min, when stablizing one section
Between after stop slip casting, wherein PsIt is using hydrostatic pressure in the hole that manometry is used after antipriming closing drilling, PsTake
1MPa。
Slip casting effect is detected after slip casting, is specially：Inspection hole is additionally drilled through in slip casting region, according to inspection hole
Middle water burst flow velocity judges slip casting effect：
①Q<Q1, slip casting effect is good, it is not necessary to continues slip casting, inspection hole is backfilled with cement mortar；
②Q1<Q<Q2, by encrypting injected hole, expansion range of grouting, selecting thick slurry to re-start slip casting, slip casting is completed
Afterwards, detected again using the detection of grouting effects method；
③Q>Q2, drilling first seals, and after determining water burst concrete condition, the tighter measures of preventing water of use is simultaneously imitated using the slip casting
Fruit detection method detects again；
Wherein, Q（L/min/m）It is every meter of drilling water yield per minute, general Q1Take 0.01 L/min/m, Q2Take 0.1 L/
min/m。
S3：After geology crushed zone 4 is exposed by excavation, according to 4 steadiness of geology crushed zone, stop pick in due course
Into；
Using construction machinery artificial or equipped with hydraulic shock destroyer, radially 4 depth bounds of geology crushed zone is excavated along cavern
Rock And Soil in 3-5m；
Using plank sheathing or steel form, along hole wall to the 4 outside installation form of geology crushed zone that has excavated（Formwork should be segmented）；
Cast-in-place intensity is not less than the concrete of C25 at the geology crushed zone 4 hollowed out（It should be segmented and pour）, and stirred using vibrating head
Mix uniformly, should be conserved before concrete setting, reduce the crack that concrete shrinkage produces.
S4：Interface between the concrete poured to the interface between cast-in-place concrete and country rock, segmentation carries out contact note
Slurry, injected hole answer wide-angle to intersect with contact surface.Grouting serous fluid, grouting process, slip casting termination criteria and detection of grouting effects etc.
With step S2 pre-pouring grouts specified in it is identical.
In the present embodiment, grouting serous fluid selects cement mortar, grouting process to select and specifies region reinforcing slip casting, and slip casting terminates mark
It is identical specified in accurate and detection of grouting effects etc. and step S2 pre-pouring grouts.Wherein detection of grouting effects when, since detection hole is straight
Connect and communicated with air, therefore PsTake zero.
S5：The supporting construction determined by surrounding rock supporting construction design method is constructed, and treats geology crushed zone 4 and peripheral region
After the support construction of domain, in situ 4 top layer of matter crushed zone sets country rock convergence and settlement monitoring measure, according to deflection
Value and rate of deformation evaluation grouting consolidation effect simultaneously judge whether to strengthen bolt-spary supports.
The present invention can solve the water blockoff of bank area geology crushed zone 4 and reinforce problem, and step is simple, easy construction, investment
Cost saving, processing time is short.
Claims (10)
1. the processing method of a kind of underground water seal cave depot bank area geology crushed zone, it is characterised in that comprise the following steps：
S1：Cave depot area three-dimensional geological model is built, and obtains the position of geology crushed zone；
S2：Multiple slip casting inclined holes are drilled through on the face before the geology crushed zone position that distance is estimated and carry out pre-pouring grout,
The multiple slip casting inclined hole is crossed geology and is crushed in center is radial towards geology crushed zone tilt distribution, the end of slip casting inclined hole
Band certain distance；
S3：After geology crushed zone is excavated and is exposed, geology crushed zone region is excavated, formwork and pours coagulation
Soil；
S4：Interface between the concrete poured to the interface between cast-in-place concrete and country rock, segmentation carries out contact slip casting；
S5：The supporting construction determined by surrounding rock supporting construction design method is constructed, and treats geology crushed zone and neighboring area branch
After protection structure is constructed, in situ matter crushed zone top layer sets country rock to restrain and settlement monitoring measure, according to deformation value and
Rate of deformation evaluates grouting consolidation effect and judges whether to strengthen bolt-spary supports.
2. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In in the step S1, at the 15-30m faces before the geology crushed zone position that distance is estimated, using advance geology exploration
Hole, verifies and determines position, thickness, occurrence and the crushed zone Rock And Soil engineering properties of geology crushed zone.
3. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 2, its feature exist
In the hole count and face area in the advance geology exploration hole are proportional, and the diameter in each advance geology exploration hole is not less than
50mm。
4. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 2, its feature exist
In, if advance geology exploration hole coring, to drilling core carry out evaluation obtain geology crushed zone information；If do not take
Core, then record drilling rate, water yield, water outlet colouring information.
5. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In in the step S2, the end of slip casting inclined hole crosses geology crushed zone and is no less than 10m；The tilt distribution of slip casting inclined hole causes
Grouting serous fluid excavates 7-9m beyond the wall of hole along cavern's radial diffusion to pre-；Grouting serous fluid dilation angle is calculated by 2-3m, and is ensured
Adjacent slip casting inclined hole reinforcing scope overlap joint and without slip casting blind area.
6. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In in the step S2, the method for drilling holes and late grouting includes：Protrusive segmenting slip casting method, specify region to strengthen grouting method
With the long once grouting method of full section.
7. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In the slurries of slip casting are selected according to Rock And Soil void characteristics, and the species of grouting serous fluid includes ordinary cement slurry, cement-swollen
Moisten soil paste, superfine cement slurry and chemicals slurries.
8. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In the concentration of slurry of slip casting process, which is converted with termination criteria, is：
1. during slip casting when grouting pressure remains unchanged and injection rate persistently reduces, or injection rate is constant and pressure persistently rises
Gao Shi, does not change the ratio of mud；
2. when grouting serous fluid injection rate reaches more than 500L, and no changes have been made or changes not notable for grouting pressure and slip casting flow velocity
When, change the dense level-one ratio of mud or the thick slurry more sticky than current grouting serous fluid；
3. repeat the 2. to walk until grouting pressure reaches PsDuring+1.5MPa, or when slip casting flow velocity is less than 2L/min, when stablizing one section
Between after stop slip casting, wherein PsIt is using hydrostatic pressure in the hole that manometry is used after antipriming closing drilling.
9. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In, slip casting effect is detected after slip casting, be specially：Inspection hole is additionally drilled through in slip casting region, is gushed according in inspection hole
Water flow velocity judges slip casting effect：
①Q<Q1, slip casting effect is good, it is not necessary to continues slip casting, inspection hole is backfilled with cement mortar；
②Q1<Q<Q2, by encrypting injected hole, expansion range of grouting, selecting thick slurry to re-start slip casting, after the completion of slip casting,
Again detect；
③Q>Q2, drill and first seal, after determining water burst concrete condition, detect using measures of preventing water and again；
Wherein, Q is water yield, Q1Take 0.01 L/min/m, Q2Take 0.1 L/min/m.
10. a kind of processing method of underground water seal cave depot bank area geology crushed zone according to claim 1, its feature exist
In the step S3 is specially：
After geology crushed zone is excavated and is exposed, according to geology crushed zone steadiness, stop driving in due course；
Using construction machinery artificial or equipped with hydraulic shock destroyer, radially geology crushed zone 3-5m depth models are excavated along cavern
Enclose interior Rock And Soil；
Using plank sheathing or steel form, along hole wall to installation form outside the geology crushed zone that has excavated；
Cast-in-place intensity is not less than the concrete of C25 at the geology crushed zone hollowed out, and is stirred evenly using vibrating head.
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| CN108868843A (en) * | 2018-08-21 | 2018-11-23 | 华东建工集团有限公司 | A kind of anchor rod support method in tunnel |
| CN111506943A (en) * | 2020-03-23 | 2020-08-07 | 中建五局第三建设有限公司 | Method for guiding reinforcing construction of fractured rock mass by three-dimensional geological model |
| CN112127909A (en) * | 2020-09-08 | 2020-12-25 | 河海大学 | Accurate grouting repairing and reinforcing method for broken surrounding rock of tunnel |
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| CN112127909A (en) * | 2020-09-08 | 2020-12-25 | 河海大学 | Accurate grouting repairing and reinforcing method for broken surrounding rock of tunnel |
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| CN108005662B (en) | 2019-08-09 |
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