CN209293800U - A kind of only sand structure of tunnel shielding portal - Google Patents
A kind of only sand structure of tunnel shielding portal Download PDFInfo
- Publication number
- CN209293800U CN209293800U CN201822151939.4U CN201822151939U CN209293800U CN 209293800 U CN209293800 U CN 209293800U CN 201822151939 U CN201822151939 U CN 201822151939U CN 209293800 U CN209293800 U CN 209293800U
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- steel ring
- cord
- sand
- steel
- outside
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Abstract
A kind of only sand structure of tunnel shielding portal, end structure including tunnel shielding portal, it is respectively fixed with steel ring and steel ring flange disk in the inner peripheral surface of end structure and outside, being welded with section in the inner peripheral surface of the steel ring is rectangle or trapezoidal only sand launder, is stopped in sand launder filled with porous material at this；Sealing cord, cord pressing plate and steel strand wires are successively arranged on the outside of the steel ring flange disk, which is the annular disk being arranged concentrically with steel ring flange disk, and internal diameter is less than steel ring flange disk；The cord pressing plate has muti-piece, and gathers along the circumference of the sealing cord and splice composition, and each piece of cord pressing plate is equipped with fixation hole and will cross sealing cord by bolt assembly and be fixed together with end structure and steel ring flange disk；It is connect with an annular steel strand wires in the outside of all cord pressing plates.The utility model has the advantages that: the only setting and the synergy of sealing cord of sand launder plays the husky effect of flowing water resistance, avoids the loss of sandy soil, it is ensured that shield export & import surrounding soil stability.
Description
Technical field
The structure in stage, the in particular to only sand knot of a kind of tunnel shielding portal are originated and received the utility model relates to shield method
Structure.
Background technique
Shield tunnel is a kind of most commonly used tunnel piercing method of domestic and international application at present, and shield construction is generally
It is more safe and efficient than other methods, it is applied to urban track traffic, railway, highway, civilian infrastructure etc. more and more widely
In the construction of field Tunnel Engineering.
Shield construction is divided into three phases: shield launching, shield driving, shield receive.It wherein originates and receives risk
Factor is more, risk probability is high, the engineering accidents such as generally existing soil body collapsing, Sand, underground utilities rupture, and damage sequence
Seriously, safety problem is more prominent.
Such as: when domestic In Subway Project shield launching, since portal top platen is turned up, B plate falls off, in addition reinforcing body
Quality is bad, eventually leads to after shield shield tail enters portal sealing ring, starts drainage occur, and hardened ground layer is caused to be opened
It splits, sink；No. 7 line engineerings of Shanghai Underground, the excessively intermediate ventilating shaft of shield originate, and after shield is left, uplink tunnel occurs
At hole the phenomenon that lower left corner burst leak, periphery soil erosion is resulted in, so that tunnel is deformed and part occurs
It is damaged.When Line of Nanjing Subway engineering carries out shield launching in rich water thin silt, there is quicksand phenomenon twice, subsurface
1.5m is fallen into, and causes pipeline failure, house collapse；Hangzhou Subway shield section, is reinforced using freezing, due to freezes body
Ablation forms leak gap, results in permeable, quicksand accident after reception；Line of Nanjing Subway shield section, since reinforcing body is opened
The gap dug between section and shield shell does not block reliably, and cutterhead paused for more than 10 hours after breaking ground, and did not complete
Whole receiving and plugging holes process results in the water burst after shield abolishes hole, gushes the generation of sand accident；Guangzhou hydraulic engineering,
Since shield receiver section is in water-rich sand layer, under the influence of artesian water, cave-in accident has occurred after causing arrival to be released.
In general, existing hole sealing technique is shallower or shield launching fashion can play certain work in buried depth
With, but when buried depth is larger or shield receives, effect is often very unsatisfactory.
Summary of the invention
The purpose of this utility model is just to provide a kind of only sand structure of tunnel shielding portal, to solve shield of the existing technology
Structure originates and receives the stage and there are problems that larger security risk.
The technical solution of the utility model is: a kind of only sand structure of tunnel shielding portal, the end structure including tunnel shielding portal,
Be respectively fixed with steel ring in the entire inner peripheral surface of the end structure and outside and with it outside the steel ring flange disk that connects, feature
It is, being welded with section in the inner peripheral surface of the steel ring is rectangle or trapezoidal only sand launder, is stopped in sand launder filled with porous at this
Material；Sealing cord, cord pressing plate and steel strand wires are successively arranged on the outside of the steel ring flange disk, which is and steel ring method
The annular disk that blue disk is arranged concentrically, internal diameter are less than steel ring flange disk；The cord pressing plate has muti-piece, and along the circumference of the sealing cord
Uniformly distributed splicing composition, there are gaps between the adjacent cord pressing plate；The each piece of cord pressing plate is equipped with fixation hole and passes through
Bolt assembly will cross sealing cord and be fixed together with end structure and steel ring flange disk；The outside of all cord pressing plates with
A piece annular steel strand wires connection.
The utility model has the advantages that: the husky effect of flowing water resistance is played in the only setting and the synergy of sealing cord of sand launder,
Avoid the loss of sandy soil, it is ensured that shield export & import surrounding soil stability.Since active well hole loop diameter and shield outer diameter have
Certain gap.To increase the received safety coefficient of shield machine, shield and before appearing installs rubber cord antipriming
Outside, welding stops sand launder in hole is enclosed, in order to reduce the gap of shield shell and hole circle, fill out sponge strip convenient for plug to prevent shield
And hole circle generates leak, leaks the problems such as mud when appearing, and improves shield launching and receives safety, reduces ground settlement, protection
Underground utilities.
Detailed description of the invention
Fig. 1 is overall structure schematic cross-sectional view of the utility model in application；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the enlarged drawing in Fig. 1 at A.
Description of symbols: 1, the only sand of seepy material, 2, rubber water-proof cord, 3, steel plate for sealing water, 4, steel strand wires, 5 is filled
Slot, 51, doughnut-shaped steel plate, 6, steel plate angle brace, 7, bolt assembly, 8, end structure, 9, steel ring, 91, steel ring flange disk, 10, GFRP
Fender post, 11, reception pedestal, 12, shield machine.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
Acquisition Fig. 1-Fig. 3, a kind of only sand structure of tunnel shielding portal of the utility model, the end structure 8 including tunnel shielding portal,
Be respectively fixed with steel ring 9 in the entire inner peripheral surface of the end structure 8 and outside and with it outside the steel ring flange disk 91 that connects,
It is characterized in that, being welded with section in the inner peripheral surface of the steel ring 9 is rectangle or trapezoidal only sand launder 5, stops in sand launder 5 and being filled at this
Porous material 1；Sealing cord 2, cord pressing plate 3 and steel strand wires 4 are successively arranged on the outside of the steel ring flange disk 91, the sealing curtain
Cloth 2 is the annular disk being arranged concentrically with steel ring flange disk 91, and internal diameter is less than steel ring flange disk 91；The cord pressing plate 3 has muti-piece, and
It is covered with 2 outside complete cycle of sealing cord, each piece of cord pressing plate 3 is equipped with fixation hole and passes through bolt assembly 7 for sealing cord 2
It is fixed together with end structure 8 and steel ring flange disk 91；The outside of all cord pressing plates 3 with an annular steel strand wires
4 connections.
The only sand launder 5 is formed using two identical doughnut-shaped steel plates 51 with the steel ring 9, two doughnut-shaped steel plates 51
The inner peripheral surface of interval setting, outer periphery and steel ring 9 welds.
There is the steel plate angle brace of triangle in side of two doughnut-shaped steel plates 51 outside hole and the corner welding between steel ring 9
6。
The outside of the only sand launder 5 is at least 100mm at a distance from outside sealing cord 2.
The porous material 1 uses good water permeability and can cross the material of the sand of thumping majority in drainage, including
Sponge or filter cotton；Or only sand launder 5 under-filled gravel (account for about the 1/3 of only sand launder 5 one weeks, with gravel will not roll out for
It is quasi-), other parts filling sponge or filter cotton.If needing to be sealed the notch of only sand launder 5 with silk screen all using gravel
Firmly.Ensure that the porous material 1 filled stoppers close, band when preventing 12 shell of shield machine by stopping sand launder 5 in only sand launder 5
Out, to influence Integral sealing.
Only the sectional dimension of sand launder 5 can be determined according to live portal steel ring 9 with shield machine crest clearance, be highly generally
1.3 times of gaps both can guarantee that shield passed through in this way, moreover it is possible to so that packing material is close to shield shell and guarantee sealing effect.?
This embodiment stops sand launder 5 width 20cm, high 20cm.Only 5 position of sand launder is 100mm or more at a distance from sealing cord 2, prevents from stopping
Water cord fabric 2 topples over the porous material 1 for touching and filling in only sand launder 5, avoids the leakproofness for influencing sealing cord 2.
Each cord pressing plate 3 is concatenated with steel strand wires 4, and banding steel strand wires, an entirety can be linked into.For
Ensure that shield machine 12 can fit closely only sand launder 5, cord pressing plate 3 can smoothly turn up, and cord pressing plate 3 is rectangular steel plates, a length of
25cm wide is 15cm, and spacing is 5cm between steel plate and steel plate.
Only two doughnut-shaped steel plates 51 of sand launder 5 with a thickness of 3mm, should be not less than with the fillet weld height of portal steel ring 9
5mm；Steel plate angle brace 6 is isosceles triangle, a length of 100mm of right-angle side, using the steel plate with a thickness of 10mm.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (5)
1. a kind of only sand structure of tunnel shielding portal, the end structure (8) including tunnel shielding portal, in the entire of the end structure (8)
The steel ring flange disk (91) that inner peripheral surface and outside are respectively fixed with steel ring (9) and connect with its outside, which is characterized in that in the steel
The inner peripheral surface of circle (9) be welded with section be rectangle or it is trapezoidal only sand launder (5), stop in sand launder (5) filled with porous material at this
Expect (1)；Sealing cord (2), cord pressing plate (3) and steel strand wires (4), the sealing are successively arranged on the outside of the steel ring flange disk (91)
Cord (2) is the annular disk being arranged concentrically with steel ring flange disk (91), and internal diameter is less than steel ring flange disk (91)；The cord pressing plate
(3) there is muti-piece, and splice along the circumference uniform distribution of the sealing cord (2) and form；Between the adjacent cord pressing plate (3) there are
Gap；The each piece of cord pressing plate (3) is equipped with fixation hole and passes through bolt assembly (7) for sealing cord (2) and end structure (8)
It is fixed together with steel ring flange disk (91)；Connect with an annular steel strand wires (4) in the outside of all cord pressing plates (3)
It connects.
2. the only sand structure of tunnel shielding portal according to claim 1, which is characterized in that described only sand launder (5) use two
A identical doughnut-shaped steel plate (51) and the steel ring (9) form, two doughnut-shaped steel plate (51) interval settings, outer periphery and steel
Enclose the inner peripheral surface welding of (9).
3. the only sand structure of tunnel shielding portal according to claim 2, which is characterized in that faced in two doughnut-shaped steel plates (51)
The corner welding between side and steel ring (9) outside hole has the steel plate angle brace (6) of triangle.
4. the only sand structure of tunnel shielding portal according to claim 1, which is characterized in that the outside of only sand launder (5)
It is at least 100mm at a distance from outside sealing cord (2).
5. the only sand structure of tunnel shielding portal according to claim 1, which is characterized in that it is characterized in that, described can be saturating
Water material (1) uses good water permeability and can cross the material of thumping majority sand in drainage, including sponge or filter cotton；Or only
The under-filled gravel of sand launder (5), other parts filling sponge or filter cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151939.4U CN209293800U (en) | 2018-12-21 | 2018-12-21 | A kind of only sand structure of tunnel shielding portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151939.4U CN209293800U (en) | 2018-12-21 | 2018-12-21 | A kind of only sand structure of tunnel shielding portal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209293800U true CN209293800U (en) | 2019-08-23 |
Family
ID=67655810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822151939.4U Expired - Fee Related CN209293800U (en) | 2018-12-21 | 2018-12-21 | A kind of only sand structure of tunnel shielding portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209293800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911172A (en) * | 2020-07-29 | 2020-11-10 | 中铁工程服务有限公司 | Novel pressure regulating self-sealing structure of shield originating receiving tunnel portal |
-
2018
- 2018-12-21 CN CN201822151939.4U patent/CN209293800U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911172A (en) * | 2020-07-29 | 2020-11-10 | 中铁工程服务有限公司 | Novel pressure regulating self-sealing structure of shield originating receiving tunnel portal |
| CN111911172B (en) * | 2020-07-29 | 2022-07-15 | 中铁工程服务有限公司 | Novel pressure regulating self-sealing structure of shield originating receiving tunnel portal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190823 Termination date: 20201221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |