CN105569666A - Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing - Google Patents
Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing Download PDFInfo
- Publication number
- CN105569666A CN105569666A CN201610036300.4A CN201610036300A CN105569666A CN 105569666 A CN105569666 A CN 105569666A CN 201610036300 A CN201610036300 A CN 201610036300A CN 105569666 A CN105569666 A CN 105569666A
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- Prior art keywords
- cutterhead
- shield
- stratum
- tool changing
- work well
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 21
- 230000005641 tunneling Effects 0.000 title abstract description 5
- 238000012423 maintenance Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000007596 consolidation process Methods 0.000 claims description 25
- 230000008859 change Effects 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 10
- 241000282326 Felis catus Species 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000001976 improved effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007306 turnover Effects 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing. In a water-rich sandy gravel stratum, surface bored piles and inter-pile grouting reinforcing are adopted for reinforcing and improving the stratum near the shutdown tool changing position to improve the stability and density of the stratum. Then, a maintenance work well with the diameter of 2 m is arranged at the position, in front of a shutdown tool plate, within the stratum reinforcing range and serves as a work space, and tool plate maintenance and tool changing can be achieved in the shield long-distance tunneling process of the water-rich sandy gravel stratum. It is verified through engineering practice that shield tool plate maintenance and tool changing can be achieved in the water-rich sandy gravel stratum through the method, the construction process is simple, high in operability, safe and reliable, engineering investment can be reduced, tool changing work efficiency can be improved, construction safety can be ensured, and wide application prospects are achieved.
Description
Technical field
The present invention relates to a kind of stratum consolidation method that in rich water sand-pebble layer, the tool changing of shield structure long distance driving normal pressure is supporting, be applied to shield structure long distance driving shield structure in sand-pebble layer and shut down the stratum consolidation at tool change position place.
Background technology
Along with the development of urban track traffic and inter-city passenger rail, shield method becomes the main engineering method of building subterranean tunnel.Shield structure is when sand-pebble layer middle and long distance tunnels, and knife disc tool wearing and tearing are relatively more serious, and for guaranteeing that shield structure normally tunnels, often tunneling a segment distance needs to overhaul shield cutter, cutter is carried out to inspection replacing.In rich water sand-pebble layer, change cutter, maintenance cutterhead, security risk is very large.
As smallest number changes cutter, the ancillary method warehouse entry tool changing with pressure operation of replacing high viscosity mud can be taked; As small-scale tool changing, the ancillary method of ground deep hole grouting strengthening stratum can be taked, warehouse entry operation with pressure; As changed cutter, maintenance cutterhead on a large scale, usually temporary shaft being set in tool changing place and carrying out normal pressure operation.Temporary shaft is set, there is the problems such as long construction period, construction area is large, large to surrounding environment influence, construction investment is high.Therefore, the problem that vertical shaft carries out normal pressure tool changing, maintenance cutterhead being set for solving, being necessary that very much research is a kind of fast, efficient, the ancillary method of cost saving, carry out normal pressure and change cutter, maintenance cutterhead.
Summary of the invention
The present invention, in order to solve the safety related technical problems of cutter changing, the cutterhead maintenance in sand-pebble layer middle and long distance tunneling process of shield machine in above-mentioned prior art, provides the stratum consolidation method that a kind of efficiency of construction is high, engineering cost is few, safe and reliable, exploitativeness is strong shield structure long distance driving normal pressure tool changing is supporting.
The present invention for addressing this problem taked technical scheme is:
The stratum consolidation method that the tool changing of shield structure long distance driving normal pressure is supporting, is intend shutting down tool change position place at shield machine to adopt Grouting Consolidation between drilled pile+stake, applies service work well in reinforcing body.Key improves stability and the density that shield structure shuts down neighbouring stratum; Emphasis is in reinforcing body, apply circular service work well, is realized cutter changing, the cutterhead maintenance of whole cutterhead by rotary head.
The method comprises the steps:
First, intend stop position at shield machine and apply drilled pile, midline position place, tunnel adopts interlocking pile; Lay Grouting Pipe between bored piles, grouting and reinforcing is carried out to the soil body between bored piles;
Secondly, within the scope of stratum consolidation, before shutdown cutterhead, a Circular Shaft is applied, as service work well; Cat ladder is set in service work well, as staff's access way;
Again, shield driving is shut down to the postpone of service work well location, is adjusted to atmospheric pressure state gradually, changes cutter, maintenance cutterhead in active well;
Finally, after cutterhead maintenance and cutter changing complete, remove the cat ladder in service work well, adopt plain concrete backfill service work well, then recover shield driving.
Wherein, drilled pile is provided with three rows, trestle column 1m, near the pile spacing 1.5m of two row hole drilling stakes of cutterhead side, the pile spacing 1.2m of the 3rd row hole drilling stake; The bottom of drilled pile is positioned at below at the bottom of shield machine and is not less than 3m.
The diameter of service work well is 2.0m, and service work well shaft bottom arranges catch basin, and cover plate is laid at catch basin top; After cutterhead maintenance and cutter changing complete, remove catch basin and cover plate.
Change in the process of cutter, realize replacing that whole cutterhead fixes a cutting tool and cutterhead maintenance by rotary head.
The advantage that the present invention has and good effect are:
Slip casting stratum consolidation ancillary method between drilled pile+stake that shield structure of the present invention tool changing is supporting, construction area is little, and little on surrounding enviroment impact, construction technology is ripe, efficiency is high, and construction investment is low; Stratum consolidation improved effect is obvious, and reinforcing body density is good; Workable, safe and reliable, be applicable to the stratum consolidation improvement that in rich water sand-pebble layer, the tool changing of shield machine long distance driving normal pressure is auxiliary.
Accompanying drawing explanation
When Fig. 1 is shield structure of the present invention shutdown tool changing stratum consolidation, cutterhead does not enter the floor map of reinforcing body;
Fig. 2 be shield structure of the present invention shut down tool changing stratum consolidation time cutterhead enter reinforcing body shut down after floor map;
Fig. 3 is the schematic longitudinal section that shield structure of the present invention shuts down tool changing stratum consolidation and active well;
Fig. 4 is the schematic cross-sectional view that shield structure of the present invention shuts down tool changing stratum consolidation and active well.
Critical piece symbol description in accompanying drawing:
1: shield machine main frame 2: shield shell
3: cutterhead 4: center cutter
5: cutter 6: shield machine axis
7: drilled pile 8: interlocking pile
9: Grouting Pipe 10: service work well
11: cat ladder 12: catch basin
13: reinforcing body 14: cover plate.
Detailed description of the invention
Referring to the drawings and specific embodiments, the stratum consolidation method that shield structure long distance driving normal pressure of the present invention tool changing is supporting is described in detail.Specific embodiment described below is only preferred forms of the present invention, and can not be interpreted as limitation of the present invention.
The stratum consolidation method that shield structure long distance driving normal pressure of the present invention tool changing is supporting, is intend shutting down tool change position at shield machine, adopts slip casting formation between surface drilling stake+stake to carry out reinforcing improvement, to improve formation stability and density; In reinforcing body, adopt rotary drilling rig to apply a round-seal reservoir, in active well, rotated by cutterhead and realize cutterhead maintenance, cutter changing.
The method comprises the steps:
First, intend shutting down tool change position at shield machine, apply drilled pile 7 on ground, reinforcing body 13 centre position, midline position place, tunnel apply interlocking pile 8; For improving stability and the density of inter-pile soil body, laying Grouting Pipe 9 between stake, grouting and reinforcing is carried out to inter-pile soil body.
Secondly, after drilled pile 7 and surface grout injection have been reinforced, in reinforcing body 13 middle part, adopt major diameter churning driven power traction hole to apply the Circular Shaft of diameter 2.0 ~ 2.5m, as the service work well 10 of cutter changing, cutterhead maintenance.The shaft bottom of service work well is deep to below cutterhead 3 center 1.8m.For convenience of personnel's turnover, cat ladder 11 is set at the borehole wall; Shaft bottom arranges catch basin 12, and cover plate 14 is laid at catch basin top, is arranged the percolating water pump drainage of strengthening stratum to ground by machine.
Again, shield machine main frame 1 tunnels shuts down to service work well 10 position, and cutterhead 3 and center cutter 4 stretch in service work well 10, are adjusted to atmospheric pressure state gradually, changes cutter 5 and maintenance cutterhead 3 in service work well 10.Change in the process of cutter, by shield machine main frame 1 rotary head 3, realize replacing that whole cutterhead fixes a cutting tool, cutterhead maintenance.
Finally, after cutterhead maintenance, cutter changing complete, remove the temporory structure in service work well 10, adopt plain concrete backfill, then recover shield driving.
Concrete steps are as follows:
1, shield structure shuts down tool change position stratum consolidation
(1) shield structure is shut down tool change position place and is laid three row's diameter 1.0m drilled piles, array pitch 1m, and near two row hole drilling pile spacing 1.5m of cutterhead side, the 3rd row hole drilling stake pile spacing 1.2m, drilled pile intersects to be laid; Cross section drilled pile lays width: shield machine is not less than 1.5m outside both sides; The drilled pile degree of depth: be not less than 3m below at the bottom of shield machine.Drilled pile builds C15 concrete, arranges glass fiber-reinforced polymer in stake.The interlocking pile cloth setting parameter of middle part is: diameter 1000mm, spacing 850mm.
(2), after drilled pile has been implemented, between drilled pile, lay Grouting Pipe carry out grouting and reinforcing improvement inter-pile soil body.
Grouting parameter:
grouting Pipe adopts the PVC mini-valve tube of diameter 42mm;
grouting Pipe lays spacing 0.75m, and Grouting Pipe hole depth is identical with the drilled pile degree of depth;
injecting paste material: adopt light water mud (W/C=1:1), the slurries initial setting time must not be greater than 5 hours.The micro-expanding agent of admixture compensate for shrinkage in slurries.
grouting process: retrusive segmenting slip casting.
2, service work well is applied
(1) in reinforcing body centre position, drill through the Circular Shaft of diameter 2.0m with rotary drilling rig as service work well, shaft bottom is positioned at below shield machine axis 1.8m.
(2) catch basin is set in service work bottom, for collecting of stratum percolating water.Catch basin size 600mm × 600mm × 500mm, steel plate cover plate is laid at top.Bottom catch basin, place small pump, percolating water is discharged ground.
(3) come in and go out for ease of personnel, at service work well sidewall, cat ladder is installed.
3, cutter maintenance is overhauled with replacing, cutterhead
(1) shield driving is shut down to service shaft well position, is adjusted to atmospheric pressure state gradually.Cutterhead enters in service work well, and center cutter enters about 700mm in service work well.By rotary head, realize replacing that whole cutterhead fixes a cutting tool, cutterhead maintenance.
After the cutterhead maintenance of (2) angles, cutter changing complete, withdraw from personnel and equipment, cutterhead rotates to another angle, carries out same workflow, until whole cutter head panel overhauls, cutter changing completes.
4, vertical shaft backfill process
After cutterhead maintenance, cutter changing complete, withdraw from staff, remove temporory structure in well, remove cat ladder, adopt C15 plain concrete by closely knit for the backfill of service work well, then recover shield driving.
The stratum consolidation that in rich water sand-pebble layer of the present invention, the tool changing of shield structure long distance driving normal pressure is supporting, construction area is little, and little on surrounding enviroment impact, construction technology is ripe, efficiency is high, and construction investment is low; Stratum consolidation improved effect is obvious, and reinforcing body density is good; Workable, safe and reliable.Be applicable to shield structure long distance driving shield structure in sand-pebble layer and shut down the stratum consolidation of tool change position.
Claims (4)
1. the stratum consolidation method that the tool changing of shield structure long distance driving normal pressure is supporting, it is characterized in that, the method comprises the steps:
First, intend stop position at shield machine and apply surface drilling stake, midline position place, tunnel adopts interlocking pile; Lay Grouting Pipe between bored piles, grouting and reinforcing is carried out to the soil body between bored piles;
Secondly, within the scope of stratum consolidation, before shutdown cutterhead, a Circular Shaft is applied, as service work well; Cat ladder is set in service work well, as staff's access way;
Again, shield driving is shut down to the postpone of service work well location, is adjusted to atmospheric pressure state gradually, changes cutter, maintenance cutterhead in active well;
Finally, after cutterhead maintenance and cutter changing complete, remove the cat ladder in service work well, adopt plain concrete backfill service work well, then recover shield driving.
2. the stratum consolidation method that shield structure long distance driving normal pressure according to claim 1 tool changing is supporting, it is characterized in that: drilled pile is provided with three rows, trestle column 1m, near the pile spacing 1.5m of two row hole drilling stakes of cutterhead side, the pile spacing 1.2m of the 3rd row hole drilling stake; The bottom of drilled pile is positioned at below at the bottom of shield machine and is not less than 3m.
3. the stratum consolidation method that shield structure long distance driving normal pressure according to claim 1 tool changing is supporting, is characterized in that: the diameter of service work well is 2.0m, and shaft bottom arranges catch basin, and cover plate is laid at catch basin top; After cutterhead maintenance and cutter changing complete, remove catch basin and cover plate.
4. the stratum consolidation method that shield structure long distance driving normal pressure according to claim 2 tool changing is supporting, is characterized in that: change in the process of cutter, realizes replacing that whole cutterhead fixes a cutting tool and cutterhead maintenance by rotary head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036300.4A CN105569666A (en) | 2016-01-20 | 2016-01-20 | Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036300.4A CN105569666A (en) | 2016-01-20 | 2016-01-20 | Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105569666A true CN105569666A (en) | 2016-05-11 |
Family
ID=55880222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610036300.4A Pending CN105569666A (en) | 2016-01-20 | 2016-01-20 | Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing |
Country Status (1)
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| CN (1) | CN105569666A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050244A (en) * | 2016-08-01 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Water-rich sand-cobble stratum shield entry and exit reinforcing system and construction method thereof |
| CN106907157A (en) * | 2017-02-09 | 2017-06-30 | 广东水电二局股份有限公司 | A kind of shield machine normal pressure opens the cabin operation construction method |
| CN108425682A (en) * | 2018-03-13 | 2018-08-21 | 中铁建大桥工程局集团第二工程有限公司 | A kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method |
| CN108643917A (en) * | 2018-05-16 | 2018-10-12 | 北京中地盾构工程技术研究院有限公司 | Half backfill formula shield cutter inspection-pit assembly construction method |
| CN109322672A (en) * | 2018-11-08 | 2019-02-12 | 中交二航局成都城市建设工程有限公司 | A kind of positive side maintenance space system of shield machine based on auxiliary pile and method |
| CN109403993A (en) * | 2018-12-04 | 2019-03-01 | 中交隧道工程局有限公司 | A kind of stake of glass fiber-reinforced polymer mesoporous and construction method for the maintenance cleaning of cutter head of shield machine front |
| CN111502672A (en) * | 2020-04-22 | 2020-08-07 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
| CN112576267A (en) * | 2021-02-22 | 2021-03-30 | 中铁九局集团第四工程有限公司 | Efficient normal-pressure tool changing construction method for water-rich sandy gravel stratum |
| CN112727467A (en) * | 2020-09-29 | 2021-04-30 | 中铁隧道局集团有限公司 | Chamber construction method for repairing shield cutter head cutter |
| CN113863940A (en) * | 2021-09-10 | 2021-12-31 | 中建三局基础设施建设投资有限公司 | Construction method for starting and receiving shallow earth covering of ultra-large-diameter slurry shield to prevent heaving |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050244A (en) * | 2016-08-01 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Water-rich sand-cobble stratum shield entry and exit reinforcing system and construction method thereof |
| CN106907157A (en) * | 2017-02-09 | 2017-06-30 | 广东水电二局股份有限公司 | A kind of shield machine normal pressure opens the cabin operation construction method |
| CN106907157B (en) * | 2017-02-09 | 2019-01-04 | 广东水电二局股份有限公司 | A kind of shield machine normal pressure opens the cabin operation construction method |
| CN108425682A (en) * | 2018-03-13 | 2018-08-21 | 中铁建大桥工程局集团第二工程有限公司 | A kind of shield tool changing ground-connecting-wall ruggedized construction and reinforced construction method |
| CN108643917A (en) * | 2018-05-16 | 2018-10-12 | 北京中地盾构工程技术研究院有限公司 | Half backfill formula shield cutter inspection-pit assembly construction method |
| CN109322672A (en) * | 2018-11-08 | 2019-02-12 | 中交二航局成都城市建设工程有限公司 | A kind of positive side maintenance space system of shield machine based on auxiliary pile and method |
| CN109403993A (en) * | 2018-12-04 | 2019-03-01 | 中交隧道工程局有限公司 | A kind of stake of glass fiber-reinforced polymer mesoporous and construction method for the maintenance cleaning of cutter head of shield machine front |
| CN111502672A (en) * | 2020-04-22 | 2020-08-07 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
| CN111502672B (en) * | 2020-04-22 | 2022-03-04 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
| CN112727467A (en) * | 2020-09-29 | 2021-04-30 | 中铁隧道局集团有限公司 | Chamber construction method for repairing shield cutter head cutter |
| CN112576267A (en) * | 2021-02-22 | 2021-03-30 | 中铁九局集团第四工程有限公司 | Efficient normal-pressure tool changing construction method for water-rich sandy gravel stratum |
| CN112576267B (en) * | 2021-02-22 | 2021-12-21 | 中铁九局集团第四工程有限公司 | Efficient normal-pressure tool changing construction method for water-rich sandy gravel stratum |
| CN113863940A (en) * | 2021-09-10 | 2021-12-31 | 中建三局基础设施建设投资有限公司 | Construction method for starting and receiving shallow earth covering of ultra-large-diameter slurry shield to prevent heaving |
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Application publication date: 20160511 |