CN205370577U - Shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing - Google Patents
Shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing Download PDFInfo
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- CN205370577U CN205370577U CN201620053183.8U CN201620053183U CN205370577U CN 205370577 U CN205370577 U CN 205370577U CN 201620053183 U CN201620053183 U CN 201620053183U CN 205370577 U CN205370577 U CN 205370577U
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Abstract
The utility model discloses a shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing, include and construct the drilled pile that quick -witted stop position department set up at the shield, carry out soil body slip casting between the stake and consolidate, this structure still includes the secant pile who adds solid intermediate position and the setting of tunnel central line cross section, the slip casting of setting between the stake is managed and is being followed the maintenance work well that the work was executed in the ground face down with the solid middle part. The utility model discloses a shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing adopts slip casting stratum reinforcement measure between drilled pile and stake, and the construction is taken up an area of for a short time, and little to the influence of all ring edge borders, construction process is ripe, efficient, and the construction investment is low, it is obvious that the stratum reinforces improved effectivity, and it is good to add the solid density, maneuverability is strong, and safe and reliable is applicable to in the rich water sand cobble stratum shield and constructs the captain and consolidate the improvement apart from tunnelling ordinary pressure tool changing auxiliary stratum.
Description
Technical field
This utility model relates to the stratum consolidation structure that in a kind of rich water sand-pebble layer, the normal pressure tool changing of shield long distance driving is supporting, is applied in sand-pebble layer shield long distance driving shield and shuts 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 building subterranean tunnel.Shield is when sand-pebble layer middle and long distance tunnels, and knife disc tool abrasion ratio is more serious, and for guaranteeing that shield is normally tunneled, often tunneling a segment distance needs shield cutter to be overhauled, carries out cutter checking and change.Changing cutter, maintenance cutterhead in rich water sand-pebble layer, security risk is very big.
As smallest number changes cutter, the ancillary method warehouse entry tool changing operation with pressure of displacement high viscosity mud can be taked；Such as small-scale tool changing, the ancillary method of ground deep hole grouting strengthening stratum, warehouse entry operation with pressure can be taked；As changed cutter, maintenance cutterhead on a large scale, generally temporary shaft is set in tool changing place and carries out normal pressure operation.Temporary shaft is set, there is the problems such as long construction period, construction area is big, big to surrounding environment influence, construction investment is high.
Utility model content
This utility model is in order to solve the safety related technical problems of cutter changing, cutterhead maintenance in sand-pebble layer middle and long distance tunneling process of shield machine in above-mentioned prior art, it is provided that the stratum consolidation structure that a kind of efficiency of construction is high, engineering cost is few, safe and reliable, exploitativeness is strong shield long distance driving normal pressure tool changing is supporting.
This utility model is adopted the technical scheme that by this problem of solution:
The stratum consolidation structure that a kind of shield long distance driving normal pressure tool changing is supporting, this structure includes the drilled pile arranged at shield machine stop position place, carries out Stabilizing Grout between stake；This structure also includes the interlocking pile that reinforcing body centre position is arranged with tunnel center line infall；It is arranged on the Grouting Pipe between bored piles and the service work well applied that faces down in reinforcing body middle part from ground.
Described drilled pile is provided with three rows, and trestle column 1m, near the pile spacing 1.5m, the pile spacing 1.2m of the 3rd row hole drilling stake of two row hole drilling stakes of cutterhead side；The bottom of drilled pile is positioned at below at the bottom of shield machine and is not less than 3m.
Described service work well is a Circular Shaft, and diameter is 2.0～2.5m, arranges cat ladder in well, and the shaft bottom of service work well arranges water leg, and cover plate is laid at water leg top.
This utility model has the advantage that and has the benefit effect that
The stratum consolidation structure that shield long distance driving normal pressure tool changing of the present utility model is supporting, this structure adopts slip casting stratum consolidation measure between drilled pile and stake, and construction area is little, and surrounding enviroment impact is little, and 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, it is adaptable to the stratum consolidation improvement of shield machine long distance driving normal pressure tool changing auxiliary in rich water sand-pebble layer.
Accompanying drawing explanation
When Fig. 1 is shield of the present utility model shutdown tool changing stratum consolidation, cutterhead is introduced into the floor map of reinforcing body；
Fig. 2 is that shield of the present utility model shuts down the floor map after cutterhead during tool changing stratum consolidation enters reinforcing body shutdown；
Fig. 3 is the schematic longitudinal section that shield of the present utility model 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: water leg
13: reinforcing body 14: cover plate.
Detailed description of the invention
Referring to the drawings and specific embodiments, the stratum consolidation structure that shield long distance driving normal pressure tool changing of the present utility model is supporting is described in detail.Specific embodiments described below is only preferred forms of the present utility model, and it is not intended that to restriction of the present utility model.
When Fig. 1 is shield of the present utility model shutdown tool changing stratum consolidation, cutterhead is introduced into the floor map of reinforcing body；Fig. 2 is that shield of the present utility model shuts down the floor map after cutterhead during tool changing stratum consolidation enters reinforcing body shutdown；Fig. 3 is the schematic longitudinal section that shield of the present utility model shuts down tool changing stratum consolidation and active well.As shown in Figure 1 to Figure 3, the stratum consolidation structure that shield long distance driving normal pressure tool changing of the present utility model is supporting, this structure includes the drilled pile 7 arranged at shield machine stop position place, carries out Stabilizing Grout between stake.This structure also includes the interlocking pile 8 that reinforcing body centre position is arranged with tunnel center line infall；It is arranged on the Grouting Pipe 9 between drilled pile 7 and the service work well 10 applied that faces down in reinforcing body middle part from ground.
Described drilled pile diameter 1.0m, is provided with three rows, 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；Transverse 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.
Grouting Pipe 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: adopting light water mud (W/C=1:1), the serosity presetting period cannot be greater than 5 hours.In serosity, admixture compensates the micro-expanding agent shunk.
Described service work well 10 is a Circular Shaft, and diameter is 2.0～2.5m, comes in and goes out for ease of personnel, installs cat ladder at service work well sidewall.The shaft bottom of service work well arranges water leg 12, and cover plate 14 is laid at water leg top.Water leg 12 collects for stratum percolating water, water leg 12 size 600mm × 600mm × 500mm.Bottom water leg, place small pump, percolating water is discharged ground.This shaft bottom is positioned at below shield machine axis 1.8m.
The method of the stratum consolidation that shield long distance driving normal pressure tool changing is supporting is as follows:
First, intending 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, lay Grouting Pipe 9 between stake and inter-pile soil is carried out grouting and reinforcing.
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 water leg 12, and cover plate 14 is laid at water leg top, by machine row by the percolating water pump drainage of strengthening stratum to ground.
Again, shield machine main frame 1 tunnels to service work well 10 position shutdown, and cutterhead 3 and center cutter 4 stretch in service work well 10, and center cutter enters about 700mm in service work well.It is adjusted to atmospheric pressure state gradually, in service work well 10, changes cutter and maintenance cutterhead 3.Change in the process of cutter, by shield machine main frame 1 rotary head 3, realize replacing, cutterhead maintenance that whole cutterhead is fixed a cutting tool.
The cutterhead maintenance of one angle, cutter changing withdraw from personnel and equipment after completing, and cutterhead rotates to another angle, carries out same workflow, until whole cutter head panel overhauls, cutter changing completes.
Finally, cutterhead maintenance, cutter changing remove the temporary facility in service work well 10 after completing, and adopt C15 plain concrete by closely knit for the backfill of service work well, then recover shield driving.
Claims (3)
1. the stratum consolidation structure that a shield long distance driving normal pressure tool changing is supporting, it is characterised in that: this structure includes the drilled pile (7) arranged at shield machine (1) stop position place, carries out Stabilizing Grout between stake；This structure also includes the interlocking pile (8) that reinforcing body (13) centre position is arranged with tunnel center line infall；It is arranged on the Grouting Pipe (9) between drilled pile (7) stake and the service work well (10) applied that faces down in reinforcing body (13) middle part from ground.
2. the stratum consolidation structure that shield long distance driving normal pressure tool changing according to claim 1 is supporting, it is characterized in that: drilled pile (7) is provided with three rows, trestle column 1m, near the pile spacing 1.5m, the pile spacing 1.2m of the 3rd row hole drilling stake of two row hole drilling stakes of cutterhead side；The bottom of drilled pile (7) is positioned at below at the bottom of shield machine and is not less than 3m place.
3. the stratum consolidation structure that shield long distance driving normal pressure tool changing according to claim 1 is supporting, it is characterized in that: service work well (10) is a Circular Shaft, diameter is 2.0～2.5m, cat ladder (11) is set in well, the shaft bottom of service work well arranges water leg (12), and cover plate (14) is laid at water leg top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053183.8U CN205370577U (en) | 2016-01-20 | 2016-01-20 | Shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053183.8U CN205370577U (en) | 2016-01-20 | 2016-01-20 | Shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing |
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| CN205370577U true CN205370577U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620053183.8U Active CN205370577U (en) | 2016-01-20 | 2016-01-20 | Shield constructs supporting stratum reinforced structure of long distance tunnelling ordinary pressure tool changing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042851A (en) * | 2019-04-15 | 2019-07-23 | 同济大学 | Reduce and wears riverway cofferdam and river bed reinforcement means under neighbouring high-speed rail deformation of pile foundation |
| 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 |
| CN111946350A (en) * | 2020-08-12 | 2020-11-17 | 中铁二十局集团第三工程有限公司 | Construction method for rapidly repairing edge of shield cutter based on high-abrasion stratum |
| 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 |
-
2016
- 2016-01-20 CN CN201620053183.8U patent/CN205370577U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042851A (en) * | 2019-04-15 | 2019-07-23 | 同济大学 | Reduce and wears riverway cofferdam and river bed reinforcement means under neighbouring high-speed rail deformation of pile foundation |
| 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 |
| CN111946350A (en) * | 2020-08-12 | 2020-11-17 | 中铁二十局集团第三工程有限公司 | Construction method for rapidly repairing edge of shield cutter based on high-abrasion stratum |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: 300142 Hebei District, Zhongshan Road, No. 10, Patentee after: China Railway Design Group Limited Address before: 300142 Hebei District, Zhongshan Road, No. 10, Patentee before: China Railway Third Survey and Design Institute Group Ltd. |
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| CP01 | Change in the name or title of a patent holder |