CN106761765A - One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method - Google Patents
One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method Download PDFInfo
- Publication number
- CN106761765A CN106761765A CN201611211301.4A CN201611211301A CN106761765A CN 106761765 A CN106761765 A CN 106761765A CN 201611211301 A CN201611211301 A CN 201611211301A CN 106761765 A CN106761765 A CN 106761765A
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- wall
- shaft
- freezing
- hole
- frozen
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000004927 clay Substances 0.000 title claims abstract description 18
- 238000007710 freezing Methods 0.000 claims abstract description 30
- 230000008014 freezing Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 23
- 241001347978 Major minor Species 0.000 claims abstract description 12
- 239000012267 brine Substances 0.000 claims abstract description 12
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 4
- 239000004571 lime Substances 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims abstract description 3
- 238000005553 drilling Methods 0.000 claims description 4
- 230000005641 tunneling Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 235000015110 jellies Nutrition 0.000 claims 1
- 239000008274 jelly Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
- E21D1/12—Preparation of the ground by freezing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method, determines major-minor well shaft center and outer according to design drawing, and indicated with lime.The data such as main round, middle round, arrangement circle footpath, hole count, the perforate spacing in anti-wall caving hole accurately determine bore position in major-minor well shaft freezing hole plane of arrangement figure.In freezing process is implemented, control brine temp and brine recycling speed, control freezing wall expansion rate, thickness and Care in method, reach and do not freeze real energy safe excavation again, main round is mainly and ensures that frost wall reaches the satisfactory requirement for handing over circle and basement rock weathering section to freeze, being undertaken together with middle round simultaneously increases Frozen wall thickness, reduces frost wall mean temperature, the effect of increase frost wall strength and stability, and middle round also acts as the effect that the well increased below anti-wall caving hole helps stability.Logical to improve shaft sinking speed, work efficiency is greatly improved, and the construction period significantly shortens, and saves expense, good economy performance.
Description
Technical field
The present invention relates to a kind of huge thick big expanded clay interval frozen construction new technology of vertical shaft, more particularly to one kind is applied to
Frozen Shaft is safely and fast excavated by huge thick big expanded clay layer construction technique.
Background technology
Frozen Shaft is by the big expanded clay of huge thick-layer, such as Jiangsu Feng County Li Tangkuang main shafts and auxiliary shaft, argillic horizon total thickness point
Not Wei 287.23m and 309.81m, account for respectively table soil freeze section 67.2% and 72.0%, particularly main shaft is in well depth -320.5
~-422.0m, auxiliary shaft in well depth -323.2~-423.8m, its continuous clay thickness degree respectively reach 101.5m and
100.6m, clay has certain viscosity mainly in yellow, grayish green, reddish brown, aubergine of becoming rusty, and natural expansion rate is 105%~115%, is frozen
0.4~0.5MPa of expansive force, frozen-heave factor 2.09%~2.65%.Freeze control quality most important, freeze too real to construction safety
It is guaranteed, but a rate of advance is too slow, and cost increases；Freeze not in place, excavate soon, but be susceptible to wall caving inbreak, potential safety hazard
Greatly, in addition occur fracture of freezing pipe, cause to freeze unsuccessfully pit shaft waterflooding.The risk of freeze section driving and masonry construction is high, and difficulty is very big, right
Borehole wall supporting construction and intensity requirement are high.After frost wall thaws, borehole wall stress is big, and force structure is complicated.
The content of the invention
The purpose of the present invention is that when overcoming above-mentioned expanded clay layer tunneling construction big to huge thickness in the prior art not
Foot, and one kind is provided is applied to Frozen Shaft and safely and fast excavate by huge thick big expanded clay layer construction technique, the new skill
Art uses the comprehensive freezing method of " main round+via hole+anti-wall caving hole ", and by Optimizing construction technique, improves and freeze to apply
Work progress, shortens the duration, can play plant machinery efficiency, construction safety, economic, practical.
The technical scheme is that：One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer
Construction method, the method is carried out according to the following steps：
S1 measures unwrapping wire according to design drawing, major-minor well shaft center and pit shaft outer is released, and entered with lime
Rower shows.
S2 according to main round, middle round and anti-wall caving hole in the major-minor well shaft freezing hole arrangement parameter table of table 1 arrangement circle
The parameters such as footpath, the depth of freezing, hole depth, perforate spacing are drilled, and whether drilling is completed, and is hole-specifically checked, sees meet the requirements.
After S3 borehole inspections meet requirement, freezing pipe is installed, be using specificationNorth expects pipe makees feed flow
Manage, specification isFreezing pipe is using interior hoop weldering.
S4 controls brine temp and brine recycling speed, control freezing wall expansion rate, thickness in freezing process is implemented
And Care in method, reach and do not freeze real energy safe excavation again.
S5 carries out Shaft Excavation according to design drawing, and pit shaft concreting is carried out in time.
The present invention has the advantage that and good effect：
1st, anti-wall caving hole is mainly in frozen soil tunneling process, plays a part of to prevent upper exposed famine wall flaps from helping, anti-
The side hole depth of freezing becomes path position determination according to shaft excavation, and main round is mainly guarantee satisfactory friendship of frost wall arrival and encloses and base
The requirement that rock weathering section is freezed, while undertaking increase Frozen wall thickness together with middle round, reducing frost wall mean temperature, increase
The effect of frost wall strength and stability, middle round also acts as the effect that the well increased below anti-wall caving hole helps stability.
2nd, can be by controlling brine temp and brine recycling speed, control freezing wall expansion rate, thickness and well side temperature
Degree, reaches and do not freeze real energy safe excavation again.
3rd, shaft sinking speed is improved, work efficiency is greatly improved, and the construction period significantly shortens, saves expense, good economy performance.
Brief description of the drawings
Fig. 1 is major-minor well shaft freezing hole plane of arrangement figure.
Specific embodiment
As described in Figure 1, the present invention is safely and fast excavated by huge thick big expanded clay layer for one kind is applied to Frozen Shaft
Construction technique, carries out 1. determining major-minor well shaft center and outer according to design drawing, and entered with lime according to the following steps
Rower shows.2. according to main round in Fig. 1 major-minor well shaft freezing hole plane of arrangement figures, middle round, the arrangement circle footpath in anti-wall caving hole,
The data such as hole count, perforate spacing accurately determine bore position, with red lacquer painting circle.According to the major-minor well shaft freezing hole cloth of table 1 during drilling
The depth of freezing is drilled in putting parameter designing table.3. whether drilling is completed, and is hole-specifically checked, sees meet the requirements.4. drill
Check after meeting requirement, install freezing pipe (specificationFreezing pipe is using interior hoop weldering), be using specificationNorth expects pipe makees feed pipe.5. in freezing process is implemented, brine temp and brine recycling speed, control are controlled
Frost wall expansion rate processed, thickness and Care in method, reach and do not freeze real energy safe excavation again.6. it is waste in tunneling process in order to reduce
Wall open-assembly time, it is ensured that outer wall excavation and lining construction safety, in huge thick-bedded clay outer wall short section pick build section it is high determine H=2.0~
2.5m, empty side time t ≯ 24h, by the control of displacement of sidewall amount in 20~50mm, it is ensured that thickness of shaft wall.7. in section is high
3 80~100mm of loop diameter, 400~600mm of depth holes are made a call in upper, middle and lower using twist drill rods by well side, while uniformly excavating 8~16
Road V-arrangement pressure relief groove, discharges the bulbs of pressure.8. bilayer 30~60mm polystyrene plastic foamboards are laid between well side and outer wall,
Fixed with the bar dowel squeezed into clay using bamboo chip, slow release of pressure effect is played certain well side deflection has been reserved, improved
Concrete walling curing condition, plays function of heat insulation, it is ensured that concrete solidifies, effectively prevents outer wall morning at low temperature
Phase damages by pressure, it is ensured that external wall construction quality and follow-up driving and masonry construction safety.9. in order to prevent outer wall cracking chip off-falling, personnel in the pit is set
It is standby to cause potential safety hazard, 10~40 sets of walling cribs first are processed on ground, walling crib is using [18a channel-section steels make, and each walling crib is by four pieces of groups
Into with 2 bolt connections of Φ 18mm between every piece, connecting plate is processed using 10mm steel plates.Each walling crib processing simultaneously is straight
Footpath Φ 36mm, the reverse wedge formula crab-bolt 12 of length 400mm, crab-bolt end thickness 10mm steel plates are welded and fixed walling crib.If hair
Existing outer wall cracking chip off-falling, 8mm steel plates are laid in the borehole wall, and steel plate specification is length × wide=6000mm × 1500mm, and ring is placed,
First steel plate is hung on reinforcing bar, after walling crib is fixed on the borehole wall, then steel plate is bolted in walling crib, walling crib and
Steel plate combination is used as the external mold for pouring into a mould concrete.Pressure stubble that is vertical and laterally having 50mm, can be connected with spot welding between every block of steel plate
Connect.10. the borehole wall concrete of pit shaft is poured.
Table 1 is major-minor well shaft freezing hole arrangement parameter design table
The major-minor well shaft frost wall formation and development prediction case of table 2
Claims (3)
1. one kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method, it is characterised in that：
The method uses the comprehensive freezing method of " main round+via hole+anti-wall caving hole ", and by Optimizing construction technique, improves jelly
Knot construction speed, shortens the duration, can play plant machinery efficiency, construction safety, economic, practical；Frozen Shaft is safely and fast
Excavate by huge thick big expanded clay layer construction technique, it is characterised in that carried out according to the following steps：S1 is according to design drawing
Paper, measures unwrapping wire, major-minor well shaft center and pit shaft outer is released, and indicated with lime；S2 is according to major-minor well
Pit shaft freezing hole arrangement parameter table is to the arrangement circle footpath of main round, middle round and anti-wall caving hole, between the depth of freezing, hole depth, perforate
Away from etc. parameter drilled, drilling complete, hole-specifically checked, see whether meet the requirements；After S3 borehole inspections meet requirement, peace
If freezing pipe, specificationFreezing pipe is welded using interior hoop, be using specificationPVC the first day of the lunar month expects pipes make feed flow
Pipe；S4 controls brine temp and brine recycling speed, control freezing wall expansion rate, thickness and well in freezing process is implemented
Side temperature, reaches and do not freeze real energy safe excavation again；S5 carries out Shaft Excavation according to design drawing, pit shaft concrete is carried out in time and is poured
Build.
2. one kind according to claim 1 is applied to Frozen Shaft and safely and fast excavates applied by huge thick big expanded clay layer
Work method, it is characterised in that：Anti- wall caving hole is mainly in frozen soil tunneling process, plays the work for preventing upper exposed famine wall flaps side
With the anti-wall caving hole depth of freezing becomes path position and determines according to shaft excavation, and main round is mainly guarantee frost wall and reaches satisfactory friendship
The requirement that circle and basement rock weathering section are freezed, while it is average that increase Frozen wall thickness, reduction frost wall are undertaken together with middle round
The effect of temperature, increase frost wall strength and stability, middle round also acts as the well increased below anti-wall caving hole and helps stability
Effect.
3. one kind according to claim 1 is applied to Frozen Shaft and safely and fast excavates applied by huge thick big expanded clay layer
Work method, it is characterised in that：By controlling brine temp and brine recycling speed, control freezing wall expansion rate, thickness and well
Side temperature, reaches and do not freeze real energy safe excavation again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211301.4A CN106761765A (en) | 2016-12-24 | 2016-12-24 | One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611211301.4A CN106761765A (en) | 2016-12-24 | 2016-12-24 | One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method |
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| Publication Number | Publication Date |
|---|---|
| CN106761765A true CN106761765A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611211301.4A Pending CN106761765A (en) | 2016-12-24 | 2016-12-24 | One kind is applied to Frozen Shaft and safely and fast excavates by huge thick big expanded clay layer construction method |
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| CN (1) | CN106761765A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104820A (en) * | 2017-11-28 | 2018-06-01 | 安徽理工大学 | Freeze-wellboring freezing hole method for arranging under a kind of big flow velocity groundwater effect |
| CN108678750A (en) * | 2018-07-19 | 2018-10-19 | 淮矿西部煤矿投资管理有限公司 | A kind of headframe pile foundation and freezing drill bore parallel construction system and parallel construction method |
| CN108843325A (en) * | 2018-07-19 | 2018-11-20 | 淮矿西部煤矿投资管理有限公司 | Cross parallel construction system and method are built in vertical headframe, pit shaft freezing, pick |
| CN108952728A (en) * | 2018-07-19 | 2018-12-07 | 淮矿西部煤矿投资管理有限公司 | A kind of headframe main body construction and self well digging freeze parallel construction system and method |
| CN110439567A (en) * | 2019-09-05 | 2019-11-12 | 李功洲 | Deep thick alluvium project of shaft freezing design method |
| CN113356858A (en) * | 2021-07-13 | 2021-09-07 | 中煤第一建设有限公司 | Non-equal-strength composite freezing wall freezing method |
| CN114382071A (en) * | 2021-12-28 | 2022-04-22 | 中煤邯郸特殊凿井有限公司 | Method for freezing chalk series stratum |
| CN114562271A (en) * | 2022-03-02 | 2022-05-31 | 安徽理工大学 | Design method of freezing rib-spalling-preventing hole of shaft |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104820A (en) * | 2017-11-28 | 2018-06-01 | 安徽理工大学 | Freeze-wellboring freezing hole method for arranging under a kind of big flow velocity groundwater effect |
| CN108678750A (en) * | 2018-07-19 | 2018-10-19 | 淮矿西部煤矿投资管理有限公司 | A kind of headframe pile foundation and freezing drill bore parallel construction system and parallel construction method |
| CN108843325A (en) * | 2018-07-19 | 2018-11-20 | 淮矿西部煤矿投资管理有限公司 | Cross parallel construction system and method are built in vertical headframe, pit shaft freezing, pick |
| CN108952728A (en) * | 2018-07-19 | 2018-12-07 | 淮矿西部煤矿投资管理有限公司 | A kind of headframe main body construction and self well digging freeze parallel construction system and method |
| CN108952728B (en) * | 2018-07-19 | 2019-06-25 | 淮矿西部煤矿投资管理有限公司 | A kind of headframe main body construction and self well digging freeze parallel construction system and method |
| CN110439567A (en) * | 2019-09-05 | 2019-11-12 | 李功洲 | Deep thick alluvium project of shaft freezing design method |
| CN110439567B (en) * | 2019-09-05 | 2020-11-03 | 李功洲 | Deep punching lamination freezing scheme design method |
| CN113356858A (en) * | 2021-07-13 | 2021-09-07 | 中煤第一建设有限公司 | Non-equal-strength composite freezing wall freezing method |
| CN113356858B (en) * | 2021-07-13 | 2023-02-28 | 中煤第一建设有限公司 | Non-equal-strength composite freezing wall freezing method |
| CN114382071A (en) * | 2021-12-28 | 2022-04-22 | 中煤邯郸特殊凿井有限公司 | Method for freezing chalk series stratum |
| CN114382071B (en) * | 2021-12-28 | 2024-02-06 | 中煤邯郸特殊凿井有限公司 | Chalk-based stratum freezing method |
| CN114562271A (en) * | 2022-03-02 | 2022-05-31 | 安徽理工大学 | Design method of freezing rib-spalling-preventing hole of shaft |
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Application publication date: 20170531 |