CN108005662B - A kind of processing method of underground water seal cave depot storage cavern area geology crushed zone - Google Patents
A kind of processing method of underground water seal cave depot storage cavern area geology crushed zone Download PDFInfo
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- CN108005662B CN108005662B CN201711295807.2A CN201711295807A CN108005662B CN 108005662 B CN108005662 B CN 108005662B CN 201711295807 A CN201711295807 A CN 201711295807A CN 108005662 B CN108005662 B CN 108005662B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000003860 storage Methods 0.000 title claims abstract description 22
- 238000003672 processing method Methods 0.000 title claims abstract description 17
- 238000007569 slipcasting Methods 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims abstract description 37
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 239000011435 rock Substances 0.000 claims abstract description 33
- 230000000694 effects Effects 0.000 claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 21
- 210000004911 serous fluid Anatomy 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 16
- 239000011440 grout Substances 0.000 claims abstract description 14
- 238000011065 in-situ storage Methods 0.000 claims abstract description 4
- 239000002344 surface layer Substances 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000011156 evaluation Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000010339 dilation Effects 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 238000004040 coloring Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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 OR ROCK 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The present invention relates to a kind of processing methods of underground water seal cave depot storage cavern area geology crushed zone, comprising the following steps: determines geology crushed zone feature in conjunction with geology and exploration hole data；It determines 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, slurries identical with pre-pouring grout, technique, termination criteria and effect detection standard can be used；The surrouding rock deformation of matter crushed zone surface layer setting in situ monitors after the completion of support construction, and judges whether to need to enhance bolt-spary supports.The present invention can solve the water blockoff of storage cavern area geology crushed zone and reinforce problem, and step is simple, easy construction, and investment cost saves, short processing time.
Description
Technical field
The present invention relates to geology crushed zone processing technology fields in underground water seal cave depot technology, underground engineering, especially relate to
And a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone.
Background technique
Tomography and crushed zone are common bad geological phenomenons during cavern excavation.In most cases, fault disruption zone
Band has on physico mechanical characteristic there are low-intensity, the features such as easily-deformable, water penetration is big, water-resistance is poor with its two sides rock mass
Significant difference.For underground water seal cave depot storage cavern area, mainly there is water curtain system water in the technical issues of being caused by crushed zone
Effect reduction, oil gas are sealed along crushed zone leakage, crushed zone Rock And Soil collapsing etc..It is then desired to which a kind of be directed to underground water seal cave depot
The processing method of storage cavern 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, later
It is subject to supporting by applying anchor pole, gunite concrete or the prefabricated concrete lining of placement etc..1. freezing is to utilize artificial system
Refrigeration technique makes the water in crushed zone build-up ice, and Jiang Yan and water become whole.To increase crushed zone strength and stability, isolation ground
It is lauched, to carry out underground engineering digging operation.Freezing is a kind of temperature pier technology, generally requires a large amount of power equipments simultaneously
It is restricted vulnerable to external condition.2. high-pressure rotary jet grouting pile method is to be mixed on cement slurry penetrating stratum with Rock And Soil with the nozzle of high-pressure rotary
It closes, forms 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 certain in the way of hydraulic, air pressure etc.
In curable slurries injection Rock And Soil, to keep ground and grout curing rear formation whole, improve the physical mechanics of Rock And Soil
Property.Slip casting method operation can be carried out, be adjusted at any time at any time and water reinforcement effect is relatively preferable.
But for underground water seal cave depot storage cavern area, above-mentioned three kinds of water reinforcement processing techniques are all infeasible, Wu Fabao
Demonstrate,prove stability, permeability and the sealing requirements of geology crushed zone.The present invention passes through pre-pouring grout, excavates 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 storage cavern area geology crushed zone.
Summary 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 depots
The processing method of storage cavern area geology crushed zone, can overcome existing geology be crushed tape processing method be difficult to ensure water blockoff sealing and
Stable problem is reinforced, 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 storage cavern area geology crushed zone, comprising the following steps:
S1: building cave depot area three-dimensional geological model, and obtain 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 are infused in advance
Slurry, the multiple slip casting inclined hole is radial towards geology crushed zone tilt distribution in center, and geology is crossed in the end of slip casting inclined hole
Crushed zone certain distance；
S3: after geology crushed zone is excavated and is exposed, geology crushed zone region is excavated, formwork with pour it is mixed
Solidifying soil；
S4: the interface between concrete poured to the interface between cast-in-place concrete and country rock, segmentation carries out contact note
Slurry；
S5: it constructs by the supporting construction that surrounding rock supporting construction design method determines, to geology crushed zone and peripheral region
After the support construction of domain, country rock convergence and settlement monitoring measure is arranged in situ matter crushed zone surface layer, according to deflection
Value and rate of deformation evaluation grouting consolidation effect simultaneously judge whether to enhance bolt-spary supports.
In the step S1, at the 15-30m face before the geology crushed zone position that distance is estimated, in advance
Position, thickness, occurrence and the crushed zone Rock And Soil engineering properties of geology crushed zone are verified and determined to matter exploration hole.
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 records 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 other than the wall of hole to pre- along cavern's radial diffusion；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, specified region reinforcing 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 type 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 converts and termination criteria are as follows:
1. during slip casting when grouting pressure remains unchanged and injection rate persistently reduces or injection rate is constant and pressure is held
When of continuing rising high, do not change the ratio of mud；
2. when grouting serous fluid injection rate has reached 500L or more, and no changes have been made or change is not shown for grouting pressure and slip casting flow velocity
When work, change the dense level-one ratio of mud or the thick slurry more sticky than current grouting serous fluid；
3. repeating the 2. to walk until grouting pressure reaches PsWhen+1.5MPa or when slip casting flow velocity is less than 2L/min, stablize one
Stop slip casting after the section time, wherein PsIt is using hydrostatic pressure in the hole for using manometry after antipriming closing drilling.
Slip casting effect is detected after slip casting, specifically: 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, needs not continue to slip casting, and inspection hole is backfilled with cement slurry；
②Q1<Q<Q2, by encryption injected hole, expansion range of grouting, thick slurry is selected to re-start slip casting, slip casting is complete
Cheng Hou is detected again；
③Q>Q2, drilling first seals, and after determining water burst concrete condition, detects 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 specifically:
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, it is deep that geology crushed zone 3-5m is radially excavated along cavern
Spend the Rock And Soil in range；
Using plank sheathing or steel form, along hole wall to installation template outside the geology crushed zone 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 invention has the following advantages that
(1) patent in terms of there is no underground water seal cave depot geology to be crushed tape processing method at present.The present invention by pre-pouring grout,
Excavate crushed zone and change and fill out the technical steps such as concrete, contact surface slip casting, deformation monitoring, is able to satisfy storage cavern area geology crushed zone
Water blockoff and reinforcement criteria solve the operation phase leakproofness and long-time stability problem of geology crushed zone.
(2) operation of the present invention step 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 the 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.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is storage cavern 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- face；3- slip casting inclined hole；4- geology crushed zone；5- does not excavate cavern side
Wall；The cavern 6- central axes；Slip casting inclined hole end profile line at 7- geology crushed zone；Grouting serous fluid is spread at 8- geology crushed zone
Outside boundary line；9- geology crushed zone excavates boundary line outside range.
Specific 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, the detailed implementation method and specific operation process are given, 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 storage cavern area geology crushed zone 4 the following steps are included:
S1: surveying data and cave depot construction time geological mapping data based on geology in detail, constructs cave depot area three-dimensional geological model, pushes away
The output position of the disconnected geology crushed zone 4 of tomography, the intensive crushed zone in joint etc. out.In the geology crushed zone 4 estimated apart from storage cavern area
At 15-30m face 2 before position, using advance geology exploration hole, verifies and determine the position of geology crushed zone 4, thickness
Degree, occurrence 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 broken
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 are fault breccia.
Crushed zone schematic diagram is shown in Fig. 2.
S2: drilling through a certain number of slip casting inclined holes 3 on face 2, to guarantee to geology crushed zone 4 and its periphery one
The Rock And Soil for determining range applies water blockoff, reinforces pre-pouring grout, forms water-stop curtain and reinforces geology crushed zone 4.Such as Fig. 2 and Fig. 3 institute
Show, 3 length of slip casting inclined hole is to cross geology crushed zone 4 to be no less than 10m；It is radial centered on injected hole arrangement form, inclination
Angle is so that grouting serous fluid excavates 8m other than the wall of hole to pre- along cavern's radial diffusion；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 mark 8 is exactly grouting serous fluid in Fig. 3
By the outside boundary line that dilation angle 2m is obtained, 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 should also detect slip casting effect after grout cures, specific as follows:
Grouting serous fluid should be selected according to Rock And Soil void characteristics, mainly select ordinary cement slurry, cement-bentonite
Slurry, superfine cement slurry, chemicals slurries (such as nano silica etc.).Since rock cranny has millimetre-sized opening width,
Therefore choose cement slurry.
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 use lower slip casting pressure
Power keeps its rapidly solidified, reduces running pulp, grout leaking；Next segment length is drilled through after the completion of first section, and uses normal grouting pressure and slurry
Liquid is until completion full section is long.
2. grouting method is strengthened in specified region: using the Grouting Pipe for having mould bag at the 5m of end, reaching specified region
When first pass through ductule slip casting carried out to mould bag and strut it to fit closely with country rock, then high slip casting pressure is used to specified region
Power, big injection rate carry out reinforcing slip casting.
3. the long once grouting of full section: drilling preferable for quality of surrounding rock, that water amount of seepage is few can be used, and injected hole is primary
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 converts and termination criteria are as follows:
1. during slip casting when grouting pressure remains unchanged and injection rate persistently reduces or injection rate is constant and pressure is held
When of continuing rising high, the ratio of mud should not be changed；
2. when certain grade of grouting serous fluid injection rate has reached 500L or more, and no changes have been made or changes for grouting pressure and slip casting flow velocity
When not significant, the Ying Gainong level-one ratio of mud or other thick slurries more sticky than current grouting serous fluid；
3. repeating the 2. to walk until grouting pressure reaches PsWhen+1.5MPa or when slip casting flow velocity is less than 2L/min, stablize one
Stop slip casting after the section time, wherein PsIt is using hydrostatic pressure, P in the hole for using manometry after antipriming closing drillingsIt takes
1MPa。
Slip casting effect is detected after slip casting, specifically: 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, needs not continue to slip casting, and inspection hole is backfilled with cement slurry；
②Q1<Q<Q2, by encryption injected hole, expansion range of grouting, thick slurry is selected to re-start slip casting, slip casting is complete
Cheng Hou is detected again using the detection of grouting effects method；
③Q>Q2, drilling first seals, and after determining water burst concrete condition, the more strict measures of preventing water of use simultaneously uses the note
Slurry effect 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, 4 depth of geology crushed zone is radially excavated along cavern
Rock And Soil in range 3-5m；
Using plank sheathing or steel form, (branch should be segmented to the 4 outside installation template of geology crushed zone excavated along hole wall
Mould)；
Cast-in-place intensity is not less than the concrete (should be segmented and pour) of C25 at the geology crushed zone 4 hollowed out, and utilizes vibration
Stick stirs evenly, and should conserve before concrete setting, reduces the crack that concrete shrinkage generates.
S4: the interface between 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.
It is identical as specified in step S2 pre-pouring grout.
In the present embodiment, grouting serous fluid selects cement slurry, grouting process that specified region is selected to strengthen slip casting, and slip casting terminates mark
Quasi- and detection of grouting effects etc. is identical as specified in step S2 pre-pouring grout.Wherein when detection of grouting effects, since detection hole is straight
It connects and is communicated with atmosphere, therefore PsTake zero.
S5: it constructs by the supporting construction that surrounding rock supporting construction design method determines, to geology crushed zone 4 and peripheral region
After the support construction of domain, in situ 4 surface layer of matter crushed zone setting country rock is restrained and settlement monitoring measure, according to deflection
Value and rate of deformation evaluation grouting consolidation effect simultaneously judge whether to enhance bolt-spary supports.
The present invention can solve the water blockoff of storage cavern area geology crushed zone 4 and reinforce problem, and step is simple, easy construction, investment
Cost saving, short processing time.
Claims (6)
1. a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone, which comprises the following steps:
S1: building cave depot area three-dimensional geological model, and obtain the position of geology crushed zone；
S2: drilling through multiple slip casting inclined holes 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 radial towards geology crushed zone tilt distribution in center, and it is broken that geology is crossed in 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: the interface between concrete poured to the interface between cast-in-place concrete and country rock, segmentation carries out contact slip casting；
S5: it constructs by the supporting construction that surrounding rock supporting construction design method determines, to geology crushed zone and neighboring area branch
After protection structure is constructed, in situ matter crushed zone surface layer is arranged country rock and restrains and settlement monitoring measure, according to deformation value and
Rate of deformation evaluation grouting consolidation effect simultaneously judges whether to enhance bolt-spary supports；
The concentration of slurry of slip casting process converts and termination criteria are as follows:
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 has reached 500L or more, and no changes have been made or changes not significant 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. repeating the 2. to walk until grouting pressure reaches PsWhen+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 for using manometry after antipriming closing drilling；
Slip casting effect is detected after slip casting, specifically: 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, needs not continue to slip casting, and inspection hole is backfilled with cement slurry；
②Q1<Q<Q2, by encryption injected hole, expansion range of grouting, thick slurry is selected to re-start slip casting, after the completion of slip casting,
Again it detects；
③Q>Q2, drilling first seals, and after determining water burst concrete condition, detects using measures of preventing water and again；
Wherein, Q is water yield, Q1Take 0.01 L/min/m, Q2Take 0.1 L/min/m；
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 makes
Grouting serous fluid excavates 7-9m other than the wall of hole to pre- along cavern's radial diffusion；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；
The step S3 specifically:
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, geology crushed zone 3-5m depth model is radially excavated along cavern
Enclose interior Rock And Soil；
Using plank sheathing or steel form, along hole wall to installation template outside the geology crushed zone 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.
2. a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone according to claim 1, feature exist
In at the 15-30m face before the geology crushed zone position that distance is estimated, using advance geology exploration in the step S1
Position, thickness, occurrence and the crushed zone Rock And Soil engineering properties of geology crushed zone are verified and determined in hole.
3. a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone according to claim 2, 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 storage cavern area geology crushed zone according to claim 2, feature exist
In, if advance geology exploration hole coring, to drilling core carry out evaluation obtain geology crushed zone information；If not taking
Core then records drilling rate, water yield, water outlet colouring information.
5. a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone according to claim 1, feature exist
In in the step S2, the method for drilling holes and late grouting includes: protrusive segmenting slip casting method, specified region reinforcing grouting method
With the long once grouting method of full section.
6. a kind of processing method of underground water seal cave depot storage cavern area geology crushed zone according to claim 1, feature exist
In the slurries of slip casting are selected according to Rock And Soil void characteristics, and the type of grouting serous fluid includes that ordinary cement slurry, cement-are swollen
Moisten soil paste, superfine cement slurry and chemicals slurries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295807.2A CN108005662B (en) | 2017-12-08 | 2017-12-08 | A kind of processing method of underground water seal cave depot storage cavern area geology crushed zone |
Applications Claiming Priority (1)
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| CN111506943B (en) * | 2020-03-23 | 2023-02-28 | 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 |
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