CN205422731U - Excavation structure of subway shield zone hard rock changeover portion - Google Patents
Excavation structure of subway shield zone hard rock changeover portion Download PDFInfo
- Publication number
- CN205422731U CN205422731U CN201620217927.5U CN201620217927U CN205422731U CN 205422731 U CN205422731 U CN 205422731U CN 201620217927 U CN201620217927 U CN 201620217927U CN 205422731 U CN205422731 U CN 205422731U
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- section
- hard rock
- shield
- steel
- portal
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model relates to an excavation structure of subway shield zone hard rock changeover portion, construct section, hard rock section and set up including the shield and construct the shaft between section and the hard rock section at the shield, bottom of the shaft is provided with the support of shaped steel steelframe and the net of setting on the shaped steel steelframe supports bumps the concrete filling layer, it spouts reinforcing pile soon to be provided with on the wall of a well of shaft, the shield constructs the section and constructs the section entrance to a cave including the shield, the hard rock section includes the hard rock section entrance to a cave, the shield constructs the section entrance to a cave and the hard rock section entrance to a cave all is provided with the steel portal, the steel portal includes annular plate, curtain cloth board, connecting bolt, steel portal steel loop and consolidates the dowel, the cross -section of steel portal steel loop is the U type, connecting bolt sets up in waiting that the shield that stabilizes constructs section or hard rock section through annular plate, curtain cloth board and steel portal steel loop are fixed, it sets up in waiting that the shield that stabilizes constructs section or hard rock section through steel portal steel loop is fixed to consolidate the dowel. The utility model discloses the reduction changeover portion department construction degree of difficulty and saving construction cost avoid shield structure machine in the in a dilemma and improvement tunnel tunnelling speed of hard rock district's section.
Description
Technical field:
This utility model belongs to subway work technical field, relates to a kind of tunnel excavation structure, is specifically related to the excavation structure of a kind of metro shield interval hard rock changeover portion.
Background technology:
Along with the development of urban track traffic, China enters the peak period that underground railway is built.Subway engineering uses shield section to construct mostly, but in complicated ground environment, and through being commonly encountered long-distance hard rock stratum, now, if continuing to use shield driving to exist, speed is slow and the tool wear shortcoming such as soon.In the case of especially wearing the most wired or other buildings under city underground, not possessing tool changing condition of opening the cabin, shield machine will be unable to normally tunnel.Considering subway tunnel crossing hard rock and immerse the environmental condition of section, construction safety and Technological Economy factor, changeover portion uses Mining Method excavation, and after preliminary bracing, shield machine segment assembly passes through.
Utility model content:
The purpose of this utility model is to provide the excavation structure of a kind of metro shield interval hard rock changeover portion, it is intended to reduce difficulty of construction and saving construction cost at changeover portion, it is to avoid shield machine is in a dilemma at hard rock section and improves tunnel piercing speed.
For reaching above-mentioned purpose, this reality utility model adopts the following technical scheme that and is achieved:
The excavation structure of a kind of metro shield interval hard rock changeover portion, including shield section, hard rock section and be arranged on the vertical shaft between shield section and hard rock section；Wherein,
Described silo bottom be provided with profile steel frame support and be arranged on profile steel frame support on net touch Concrete Filled layer；Rotary jet strengthening stake it is provided with on the borehole wall of described vertical shaft；Described shield section includes shield section hole；Described hard rock section includes hard rock section hole；Described shield section hole and hard rock section hole are provided with steel portal；Described steel portal includes Circular Plate, cord plate, connecting bolt, steel portal steel loop and reinforces dowel；The cross section of described steel portal steel loop is U-shaped；Described connecting bolt is fixedly installed in shield section to be consolidated or hard rock section by Circular Plate, cord plate and steel portal steel loop；Described reinforcing dowel is fixedly installed in shield section to be consolidated or hard rock section by steel portal steel loop.
This utility model is further improved by: described steel portal steel loop includes stretching into cylinder and is connected and is arranged on stretch into the linking arm at a both ends with stretching into an end；Described linking arm and to stretch into cylinder entirety U-shaped；Described being arranged on the linking arm stretching into a both ends is respectively arranged with the first connecting bolt and the second connecting bolt；Described first connecting bolt is directly fixedly installed in shield section to be consolidated or hard rock section by linking arm；Described second connecting bolt is fixedly installed in shield section to be consolidated or hard rock section by Circular Plate, cord plate and linking arm；Described reinforcing dowel is fixedly installed in shield section to be consolidated or hard rock section by stretching into cylinder and/or linking arm.
This utility model is further improved by: described reinforcing dowel includes vertically reinforcing dowel, and described vertical reinforcing dowel is fixedly installed in shield hole to be consolidated by stretching into cylinder；Described vertical reinforcing dowel is one or more, and when described vertical reinforcing dowel is many, described many vertical reinforcing dowels are arranged parallel；The diameter of described vertical reinforcing dowel is not less than 16mm.
This utility model is further improved by: described reinforcing dowel also includes oblique reinforcing dowel, and described oblique reinforcing dowel linking arm is oblique to be fixedly installed in shield hole to be consolidated；The diameter of described oblique reinforcing dowel is not less than 12mm.
This utility model is further improved by: be provided with bolt box on described linking arm, is provided with nut in described bolt box, and described connecting bolt is connected with the nut in bolt box by Circular Plate, cord plate and linking arm；Described connecting bolt is stud.
This utility model is further improved by: described steel portal also includes the detachable turnover panel being connected with Circular Plate by guide.
This utility model is further improved by: described steel portal is Split type structure；Described steel portal includes at least two parts that shape is identical；At least two parts that shape is identical become steel portal to spell shape.
This utility model is further improved by: the transverse section at described hard rock section hole is the shape of a hoof；The transverse section at described shield section hole is circular；Described horseshoe-shaped internal headroom minimum dimension is more than circle；Described u-shaped cross-section center and circular cross section center superposition.
Compared with prior art, this utility model has the following technical effect that
This utility model utilizes the import and export that vertical shaft is constructed as metro using mining method, construction site area can be reduced, shield section and hard rock section are connected into an entirety by vertical shaft, the subway work making shield section combine Mining Method is possibly realized, the size of vertical shaft is bigger than shield section, hard rock section section, it is possible to effectively and rapidly install steel portal；Shaft perimeter rotary churning pile is reinforced, it is possible to bear the atmospheric pressure of shield section face, ensures the structural safety of binding site.At shield section and hard rock section binding site, steel portal is installed, and steel portal is installed in hard rock section termination, it is possible to ensure and complete stablizing of construction hard rock section in advance.Meanwhile, steel portal good integrity, it is to avoid binding site unstability during shield machine transition mine section, causes the deviation in shield driving direction.The installation of cord plate on steel portal, improves the efficiency that shield machine advances.Between two steel portals, lay guide table, improve the ride comfort of shield machine transition.Making hard rock section section center and shield section center superposition, hard rock section section is more than shield section, beneficially shield machine quick transition hard rock section, and beneficially Construction control.
Accompanying drawing illustrates:
Fig. 1 is the overall schematic of excavation structure provided by the utility model；
Fig. 2 is the cross section reinforcing bar layout drawing of the steel portal that this utility model is used；
Fig. 3 is the partial structurtes schematic diagram of the steel portal that this utility model is used；
Fig. 4 is the position view reinforcing dowel in steel portal；
Fig. 5 is hard rock section section structure schematic diagram；
Fig. 6 is shield section section structure schematic diagram；
In figure: 1-stretches into cylinder；2-linking arm；3-bolt box；4-connecting bolt；5-Circular Plate；The detachable turnover panel of 6-；7-cord plate；8-vertically reinforces dowel；9-oblique reinforcing dowel；10-guide；11-hard rock section；12-vertical shaft；13-rotary jet strengthening stake；14-shield section；15-hard rock section hole；16-shield section hole.
Detailed description of the invention:
Specific embodiment of the utility model given below, it should be noted that this utility model is not limited to specific examples below, and all equivalents done on the basis of technical scheme each fall within protection domain of the present utility model.
Seeing Fig. 1, Fig. 3 and Fig. 4, this utility model provides the excavation structure of a kind of metro shield interval hard rock changeover portion, including shield section 14, hard rock section 11 and the vertical shaft 12 being arranged between shield section 14 and hard rock section 11；Wherein, be provided with bottom vertical shaft 12 profile steel frame support and be arranged on profile steel frame support on net touch Concrete Filled layer；Rotary jet strengthening stake 13 it is provided with on the borehole wall of vertical shaft 12；Shield section 14 includes shield section hole 16；Hard rock section 11 includes hard rock section hole 15；Shield section hole 16 and hard rock section hole 15 are provided with steel portal；Steel portal includes Circular Plate 5, cord plate 7, connecting bolt 4, steel portal steel loop and reinforces dowel；The cross section of steel portal steel loop is U-shaped；Connecting bolt 4 is fixedly installed in shield section 14 to be consolidated or hard rock section 11 by Circular Plate 5, cord plate 7 and steel portal steel loop；Reinforce dowel to be fixedly installed in shield section 14 to be consolidated or hard rock section 11 by steel portal steel loop.
Steel portal steel loop includes stretching into cylinder 1 and is connected and is arranged on stretch into the linking arm 2 at cylinder 1 both ends with stretching into cylinder 1 end；Linking arm 2 and to stretch into cylinder 1 overall U-shaped；It is arranged on to stretch into and on the linking arm 2 at cylinder 1 both ends, is respectively arranged with the first connecting bolt and the second connecting bolt；First connecting bolt is directly fixedly installed in shield section 14 to be consolidated or hard rock section 11 by linking arm 2；Second connecting bolt is fixedly installed in shield section 14 to be consolidated or hard rock section 11 by Circular Plate 5, cord plate 7 and linking arm 2；Reinforce dowel to be fixedly installed in shield section 14 to be consolidated or hard rock section 11 by stretching into cylinder 1 and/or linking arm 2.
Seeing Fig. 2 and Fig. 4, reinforce dowel and include vertically reinforcing dowel 8, vertical dowel 8 of reinforcing is fixedly installed in shield hole to be consolidated by stretching into cylinder 1；Vertical dowel 8 of reinforcing is one or more, and when vertical reinforcing dowel 8 is many, many vertical reinforcing dowels 8 are arranged parallel；The vertical diameter reinforcing dowel 8 is not less than 16mm.
Reinforcing dowel and also include oblique reinforcing dowel 9, oblique reinforcing dowel 9 linking arm 2 is oblique to be fixedly installed in shield hole to be consolidated；The diameter of oblique reinforcing dowel 9 is not less than 12mm.
Being provided with bolt box 3 on linking arm 2, be provided with nut in bolt box 3, connecting bolt 4 is connected with the nut in bolt box 3 by Circular Plate 5, cord plate 7 and linking arm 2；Connecting bolt 4 is stud.
Steel portal also includes the detachable turnover panel 6 being connected with Circular Plate 5 by guide 10.
Steel portal is Split type structure；Steel portal includes at least two parts that shape is identical；At least two parts that shape is identical become steel portal to spell shape.
Seeing Fig. 5 and Fig. 6, the transverse section at hard rock section hole 15 is the shape of a hoof；The transverse section at shield section hole 16 is circular；Horseshoe-shaped internal headroom minimum dimension is more than circle；U-shaped cross-section center and circular cross section center superposition.
This utility model, when Specific construction, initiates from distance Hard Rock Area section and avoids hard rock at mileage 3.3m and applied downwards vertical shaft by earth's surface, and vertical shaft length-wide-a height of 7.5m-8.6m-24m, tunnel trend is vertical shaft length direction.Shaft perimeter uses rotary churning pile to reinforce, and reinforcing scope is the most each 3m, tunnel axis direction 5m.Shaft bottom arranges the net of profile steel frame support and C25, thick 400mm and touches concrete.
Excavating steel portal length mileage in shield-tunneling construction direction with Mining Method, install steel portal and cord plate at this section of mileage, steel portal termination and face are close to.First surveying and locating during installation, makes center, hole absolute altitude and position, and steel portal is divided into 4 1/4 circles when installing processing, up and down to spelling, lower half semicircle, more assembled first half semicircle are first installed, the whole electric welding of piece, and face is sprayed concrete spraying support.
Hard rock section Mining Method completes construction, to face gunite concrete, and with C25 plain concrete to termination execution tunneling boring closure；Installing guide table, guide table starting point starts to extend to hard rock section steel portal from vertical shaft steel portal；When the construction of shield section is close to vertical shaft steel portal, face pressure passes to steel portal, then is passed to vertical shaft by steel portal, shaft structure bears.Shield machine reduces fltting speed, and low speed cutting face, until falling into steel portal；Shield machine is unloaded under guide table supports and guides to be advanced and segment assembly, thus by the hard rock section of intrusion；Shield machine slows down and enters hard rock section steel portal, stops, it is ensured that cutter head of shield machine rotates smoothly and cuts face beyond distance face 1m.Vertical shaft applies downwards from earth's surface and forms, and the degree of depth is more than the degree of depth bottom shield section and hard rock section, the width that described vertical shaft is vertical with tunnel direct of travel enters force structure during hard rock section more than shield section and the width of hard rock section, its import and export constructed forward as Mining Method and shield machine；When steel portal is installed, first excavate with Mining Method, relocate installation steel portal.
Claims (8)
1. the excavation structure of a metro shield interval hard rock changeover portion, it is characterised in that: include shield section, hard rock section and be arranged on the vertical shaft between shield section and hard rock section；Wherein,
Described silo bottom be provided with profile steel frame support and be arranged on profile steel frame support on net touch Concrete Filled layer；Rotary jet strengthening stake it is provided with on the borehole wall of described vertical shaft；Described shield section includes shield section hole；Described hard rock section includes hard rock section hole；Described shield section hole and hard rock section hole are provided with steel portal；Described steel portal includes Circular Plate, cord plate, connecting bolt, steel portal steel loop and reinforces dowel；The cross section of described steel portal steel loop is U-shaped；Described connecting bolt is fixedly installed in shield section to be consolidated or hard rock section by Circular Plate, cord plate and steel portal steel loop；Described reinforcing dowel is fixedly installed in shield section to be consolidated or hard rock section by steel portal steel loop.
The excavation structure of metro shield interval the most according to claim 1 hard rock changeover portion, it is characterised in that: described steel portal steel loop includes stretching into cylinder and is connected and is arranged on stretch into the linking arm at a both ends with stretching into an end；Described linking arm and to stretch into cylinder entirety U-shaped；Described being arranged on the linking arm stretching into a both ends is respectively arranged with the first connecting bolt and the second connecting bolt；Described first connecting bolt is directly fixedly installed in shield section to be consolidated or hard rock section by linking arm；Described second connecting bolt is fixedly installed in shield section to be consolidated or hard rock section by Circular Plate, cord plate and linking arm；Described reinforcing dowel is fixedly installed in shield section to be consolidated or hard rock section by stretching into cylinder and/or linking arm.
The excavation structure of metro shield interval the most according to claim 2 hard rock changeover portion, it is characterised in that: described reinforcing dowel includes vertically reinforcing dowel, and described vertical reinforcing dowel is fixedly installed in shield hole to be consolidated by stretching into cylinder；Described vertical reinforcing dowel is one or more, and when described vertical reinforcing dowel is many, described many vertical reinforcing dowels are arranged parallel；The diameter of described vertical reinforcing dowel is not less than 16mm.
The excavation structure of metro shield interval the most according to claim 3 hard rock changeover portion, it is characterised in that: described reinforcing dowel also includes oblique reinforcing dowel, and described oblique reinforcing dowel linking arm is oblique to be fixedly installed in shield hole to be consolidated；The diameter of described oblique reinforcing dowel is not less than 12mm.
The excavation structure of metro shield interval the most according to claim 4 hard rock changeover portion, it is characterized in that: on described linking arm, be provided with bolt box, being provided with nut in described bolt box, described connecting bolt is connected with the nut in bolt box by Circular Plate, cord plate and linking arm；Described connecting bolt is stud.
The excavation structure of metro shield interval the most according to claim 5 hard rock changeover portion, it is characterised in that: described steel portal also includes the detachable turnover panel being connected with Circular Plate by guide.
7. according to the excavation structure of the metro shield interval hard rock changeover portion according to any one of claim 1-6, it is characterised in that: described steel portal is Split type structure；Described steel portal includes at least two parts that shape is identical；At least two parts that shape is identical become steel portal to spell shape.
The excavation structure of metro shield interval the most according to claim 7 hard rock changeover portion, it is characterised in that: the transverse section at described hard rock section hole is the shape of a hoof；The transverse section at described shield section hole is circular；Described horseshoe-shaped internal headroom minimum dimension is more than circle；Described u-shaped cross-section center and circular cross section center superposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217927.5U CN205422731U (en) | 2016-03-21 | 2016-03-21 | Excavation structure of subway shield zone hard rock changeover portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217927.5U CN205422731U (en) | 2016-03-21 | 2016-03-21 | Excavation structure of subway shield zone hard rock changeover portion |
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| Publication Number | Publication Date |
|---|---|
| CN205422731U true CN205422731U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620217927.5U Expired - Fee Related CN205422731U (en) | 2016-03-21 | 2016-03-21 | Excavation structure of subway shield zone hard rock changeover portion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907164A (en) * | 2017-03-27 | 2017-06-30 | 中铁隧道勘测设计院有限公司 | A kind of water-bed combination of mine shield tunnel docking structure form and its construction method |
| CN107191198A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | The retaining structure and method of a kind of horizontal creep of suppression tunnel light and shade hole intersection slopes |
| CN109026043A (en) * | 2018-09-18 | 2018-12-18 | 中铁第六勘察设计院集团有限公司 | A kind of long range submerged tunnel mine shield dynamic lays pattern and method from joint |
-
2016
- 2016-03-21 CN CN201620217927.5U patent/CN205422731U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907164A (en) * | 2017-03-27 | 2017-06-30 | 中铁隧道勘测设计院有限公司 | A kind of water-bed combination of mine shield tunnel docking structure form and its construction method |
| CN107191198A (en) * | 2017-04-05 | 2017-09-22 | 中铁二十二局哈尔滨铁路建设集团有限责任公司 | The retaining structure and method of a kind of horizontal creep of suppression tunnel light and shade hole intersection slopes |
| CN109026043A (en) * | 2018-09-18 | 2018-12-18 | 中铁第六勘察设计院集团有限公司 | A kind of long range submerged tunnel mine shield dynamic lays pattern and method from joint |
| CN109026043B (en) * | 2018-09-18 | 2023-11-10 | 中铁第六勘察设计院集团有限公司 | Dynamic self-joint laying type and method for long-distance underwater tunnel mine shield |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20170321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |