CN209244580U - A kind of high-bearing capacity shield tunnel segment joint structure - Google Patents
A kind of high-bearing capacity shield tunnel segment joint structure Download PDFInfo
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- CN209244580U CN209244580U CN201821764862.1U CN201821764862U CN209244580U CN 209244580 U CN209244580 U CN 209244580U CN 201821764862 U CN201821764862 U CN 201821764862U CN 209244580 U CN209244580 U CN 209244580U
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Abstract
The utility model discloses a kind of high-bearing capacity shield tunnel segment joint structures, including concrete, and it is embedded in the cast iron built-in fitting in concrete, it is characterized in that being contaminated with steel fibre and polypropylene fibre in hybrid fiber concrete being hybrid fiber concrete away from the concrete in the certain distance of section of jurisdiction end；Prepared screw-bolt hole on cast iron built-in fitting penetrates bolt from prepared screw-bolt hole on cast iron built-in fitting, realizes and connects between the adjacent section of jurisdiction of two panels.By taking this joint geometry, the integral strength and rigidity of tunnel connector can be improved, resisting unfavorable large eccentric pressuring load suffered by hydraulic pressure tunnel in Rectangular Tunnel or height influences.
Description
Technical field
The utility model relates to a kind of high-bearing capacity shield tunnel segment joint structures, are specifically directed to rectangular shield
There is jointing structure between the section of jurisdiction block of interior hydraulic pressure shield tunnel in tunnel.Such joint structure can effectively improve tunnel and connect
The integral strength and rigidity of head reduce cracking risk of the connector under load action, resist rectangular shield tunnel or have interior hydraulic pressure
The large eccentricity load that tunnel bring connector is subject to.
Background technique
Currently, with national economy level promoted, for save urban underground space occupy and reduce underground space development at
This, rectangular shield is widely applied in High-Density Urban Area.Rectangular shield method tunnel is because structure transverse face is close to rectangular frame
Stress, the moment of flexure that contact cross-section is subject to is big and axle power is small, and the unfavorable force modes of large eccentric pressuring are presented.In addition, being filled by assembly
Standby carrying power limit, than relatively limited, the section bearing capacity that connector can be improved is restricted the selection of section of jurisdiction thickness.According to domestic and international reality
The problem of trampling experience, connector stress can solve using compound section of jurisdiction, but the cost of compound section of jurisdiction reaches general armored concrete
The 2 times or more of section of jurisdiction, cost is very high, is not suitable for the construction of long distance tunnel.
On the other hand, during optimizing water source supply and promoting sponge city, water delivery, the storage of China's shield construction
Water, outlet tunnel are more and more, because internal water pressure offset circular tunnel suffered by axle power, connector also present large eccentric pressuring it is unfavorable by
Force mode.Traditional shield tunnel connector, based on use armored concrete prefabricated pipe section, with straight bolt or oblique bolt butt joint
The method being directly attached is not particularly suited for the tunnel connector of interior influence of hydraulic pressure.To reduce interior hydraulic pressure to the shadow of tunnel structure
It rings, also frequently with the double-deck lining cutting, but the construction period is long and at high cost.
Fibre reinforced concrete has been widely used in the constructions of structures such as civil buildings, bridge, road, have crude fibre and
Fine fibre two major classes.Wherein using steel fibre as the coarse-fibred mechanism of action of representative are as follows: in tensile load or the work of bending load
Under, after crack occurs in concrete, fiber and concrete shared external force, making concrete still has certain carrying and deformation
Ability absorbs more energy, thus is remarkably improved the toughness of concrete, and correspondingly improve the impact resistance of concrete with
Fatigue resistance.It is by the fine fibre mechanism of action of representative of polypropylene (PP) fiber: on the one hand reduces and inhibit concrete bone
Plastic settlement cracks caused by material sedimentation isolates, on the other hand reduce and plastic shrinkage caused by concrete dehydration shrinkage are inhibited to split
Seam.Joint stiffness and bearing capacity can be effectively improved in conjunction with the strengthening measure of adapter plate using the fiber concrete of suitable volume.
From the angle for improving duct piece connector stress performance in the utility model, based on the shield tunnel by large eccentric pressuring
The loading characteristic of road connector proposes such high-bearing capacity shield tunnel segment joint that can be used for single shell lining.
Utility model content
The purpose of this utility model is to provide a kind of high-bearing capacity shield tunnel segment joint structure, connector concrete is adopted
With hybrid fiber concrete (steel fibre+polypropylene fiber concrete), position is bolted using ironcasting adapter plate, guarantee can
Quickly and easily reinforced concrete segment connect between block, to obtain overall stiffness and intensity is enough, durability compared with
Good shield tunnel ring.
To achieve the goals above, the technical solution of the utility model is as follows: a kind of high-bearing capacity duct pieces of shield tunnel connects
Header structure, including concrete, and the cast iron built-in fitting being embedded in concrete, it is characterised in that away from one spacing of section of jurisdiction end
It is hybrid fiber concrete, prepared screw-bolt hole on cast iron built-in fitting, from prepared screw-bolt hole on cast iron built-in fitting from interior concrete
Place penetrates bolt, realizes and connects between the adjacent section of jurisdiction of two panels.
Further, steel fibre and polypropylene fibre are equipped in hybrid fiber concrete, the steel fibre and polypropylene are fine
Dimension is woven into reticular structure, and wherein the warp of the reticular structure or weft are steel fibre, and weft or warp are polypropylene fibre.
Further, steel fibre and polypropylene fibre are equipped in hybrid fiber concrete, the steel fibre and polypropylene are fine
Dimension is separately woven into steel fibre net and polypropylene fiber net, and wherein steel fibre net and polypropylene fiber net are spaced apart in section of jurisdiction end
Portion.
Further, hybrid fiber concrete is poured with region of the section of jurisdiction threshold value in hand hole width double-wide.
Further, the joint structure, which is arranged side by side, two block casting iron built-in fittings, sets side by side in each cast iron built-in fitting
There are two bolts hole.
Further, the joint structure lower part, which is arranged side by side, two block casting iron built-in fittings, and the two sides of contact cross-section are in
Portion is provided with shearing resistance stirrup, and the contact cross-section top is provided with construction muscle, is disposed with main reinforcement perpendicular to contact cross-section, described
Corner reinforcing bar is provided at four angles of contact cross-section, the shearing resistance stirrup, construction muscle, main reinforcement, cableway, corner reinforcing bar are total
With constituting steel reinforcement cage, the upper outside of every block casting iron built-in fitting is equipped with multiple anchor supports, each anchor support by with
The vertically disposed pre-buried support dowel of contact cross-section is connect with steel reinforcement cage.
The utility model uses hybrid fiber concrete in hand hole width double-wide, reduces section of jurisdiction and produces at the initial stage that pours
Raw crack simultaneously increases section of jurisdiction in the bearing capacity and rigidity of operation phase.Use two block casting iron built-in fittings, each cast iron built-in fitting
Using two bolts, to resist the section pulling force of large eccentric pressuring generation.By taking this joint geometry, tunnel can be improved
The integral strength and rigidity of connector, resisting unfavorable large eccentric pressuring load suffered by hydraulic pressure tunnel in Rectangular Tunnel or height influences.
Detailed description of the invention
Fig. 1 is connector connecting structure figure.
Fig. 2 is contact cross-section bar arrangement drawing.
Fig. 3 is connector built-in fitting.
Fig. 4 is position (anchor ring) of the connector in section of jurisdiction.
Fig. 5 is position (intrados) of the connector in section of jurisdiction.
It include: hybrid fiber concrete 1, cast iron built-in fitting 2, shearing resistance stirrup 3, construction muscle 4, main reinforcement 5, cableway in figure
6, corner reinforcing bar 7, pre-buried support dowel 8, bolt hole 9, normal concrete 10, connection hand hole 11.
Specific embodiment
The utility model will be further described with reference to the accompanying drawing.
As shown in Figure 1, a kind of high-bearing capacity shield tunnel segment joint structure, including concrete, and it is embedded in coagulation
Cast iron built-in fitting 2 in soil, it is characterised in that it is being hybrid fiber concrete 1 away from the concrete in the certain distance of section of jurisdiction end,
Steel fibre and polypropylene fibre are contaminated in hybrid fiber concrete；Prepared screw-bolt hole on cast iron built-in fitting, from cast iron built-in fitting 2
Bolt is penetrated at upper prepared screw-bolt hole, is realized and is connected between the adjacent section of jurisdiction of two panels.
According to concrete conditions such as the buried depth in tunnel, diameter (span), water level and external loads, in connector hand hole double-width model
It encloses interior using hybrid fiber concrete, is penetrated from prepared screw-bolt hole on cast iron built-in fitting and be bolted that (in Fig. 1, a is connection hand
Hole width).Hybrid fiber concrete is the prior art, can be by being commercially available.Hybrid fiber concrete can be used in concrete
Steel fibre and polypropylene fibre can also be woven into reticular structure, be cast in mixed by the mode of hybrid fiber and polypropylene fibre
In solidifying soil.
One embodiment according to the present utility model, hybrid fiber concrete is interior to be equipped with steel fibre and polypropylene fibre, institute
It states steel fibre and polypropylene fibre is woven into reticular fiber structure, wherein the warp of the reticular fiber structure or weft are that steel is fine
Dimension, weft or warp are polypropylene fibre.
Another embodiment according to the present utility model, hybrid fiber concrete is interior to be equipped with steel fibre and polypropylene fibre, institute
It states steel fibre and polypropylene fibre is separately woven into steel fibre net and polypropylene fiber net, wherein steel fibre net and polypropylene fibre
Net is spaced apart in section of jurisdiction end.
The reticular fiber structure can be arranged along section of jurisdiction radial cross-section, can also be arranged along section of jurisdiction axial cross section.
As described in Figure 2, contact cross-section solves answering for connector and section of jurisdiction in such a way that main reinforcement combines arrangement of reinforcement with distributing bar
Miscellaneous force modes.As shown, the joint structure lower part, which is arranged side by side, two block casting iron built-in fittings 2, the two sides of contact cross-section
It is provided with shearing resistance stirrup 3 with middle part, cast iron built-in fitting 2 is located between middle part shearing resistance stirrup and two sides shearing resistance stirrup, described to connect
Head section top is provided with construction muscle 4, is disposed with main reinforcement 5 and cableway 6 perpendicular to contact cross-section, and the four of the contact cross-section
Corner reinforcing bar 7 is provided at a angle, the shearing resistance stirrup 3, construction muscle 4, main reinforcement 5, cableway 6, corner reinforcing bar 7 collectively form
Steel reinforcement cage, the upper outside of every block casting iron built-in fitting are equipped with 5 anchor supports, each anchor support by with contact cross-section
Vertically disposed pre-buried support dowel 8 is connect with steel reinforcement cage.
As shown in figure 3, cast iron built-in fitting uses two bolts hole, assembling duration is saved.Each joint structure is arranged side by side
Two block casting iron built-in fittings, each cast iron built-in fitting are arranged two bolts hole, use four be arranged side by side between two adjacent sections of jurisdiction
Root is bolted, to resist the section pulling force of large eccentric pressuring generation.The locating height of bolt is according to section least favorable stress
It determines.
As described in Fig. 4 and Fig. 5, section of jurisdiction is in casting process according to hybrid fiber concrete and the respective portion of normal concrete
Subregion carries out subregion and pours, and improves the service efficiency of fiber, reduces the cost of manufacture of section of jurisdiction.H is the locating height of bolt in figure,
A is connection hand hole width.
The utility model difference with the prior art point is: pouring the stage in section of jurisdiction, adopts in hand hole width double-wide
With hybrid fiber concrete, reduces section of jurisdiction and pouring the crack of initial stage generation and increasing section of jurisdiction in the bearing capacity and just of operation phase
Degree.Joint area, pre-buried ironcasting and normal concrete under large eccentric pressuring state, what the stress raisers of generation generated
The available solution of concrete cracking problem.Section of jurisdiction in casting process according to hybrid fiber concrete with normal concrete respectively
Partial region carry out subregion pour, improve the service efficiency of fiber, reduce the cost of manufacture of section of jurisdiction.In section of jurisdiction ring assembly rank
Bolt can be pierced into embedded part bolt hole by equipment and nut is tightened completion assembly again by section.In the component process segment, in section of jurisdiction
Steel reinforcement cage is hung in template, then built-in fitting is anchored near the hand hole of section of jurisdiction, and built-in fitting and steel reinforcement cage is made to form one.
Claims (6)
1. a kind of high-bearing capacity shield tunnel segment joint structure, including concrete, and the cast iron being embedded in concrete are pre-
Embedded part, it is characterised in that it is being hybrid fiber concrete away from the concrete in the certain distance of section of jurisdiction end, it is pre- on cast iron built-in fitting
Bolt hole is stayed, bolt is penetrated from prepared screw-bolt hole on cast iron built-in fitting, realizes and is connected between the adjacent section of jurisdiction of two panels.
2. high-bearing capacity shield tunnel segment joint structure as described in claim 1, which is characterized in that hybrid fiber concrete
Interior to be equipped with steel fibre and polypropylene fibre, the steel fibre and polypropylene fibre are woven into mesh sheet structure, wherein the mesh sheet structure
Warp or weft be steel fibre, weft or warp are polypropylene fibre.
3. high-bearing capacity shield tunnel segment joint structure as described in claim 1, which is characterized in that hybrid fiber concrete
Interior to be equipped with steel fibre and polypropylene fibre, the steel fibre and polypropylene fibre are separately woven into steel fibre mesh sheet and polypropylene is fine
Mesh sheet is tieed up, wherein steel fibre mesh sheet and polypropylene fibre mesh sheet are spaced apart in section of jurisdiction end.
4. high-bearing capacity shield tunnel segment joint structure as described in claim 1, which is characterized in that with section of jurisdiction threshold value
Region in hand hole width double-wide pours hybrid fiber concrete.
5. high-bearing capacity shield tunnel segment joint structure as described in claim 1, which is characterized in that the joint structure is simultaneously
Row is provided with two block casting iron built-in fittings, is set side by side in each cast iron built-in fitting there are two bolt hole.
6. high-bearing capacity shield tunnel segment joint structure as described in claim 1, which is characterized in that under the joint structure
Portion, which is arranged side by side, two block casting iron built-in fittings, and the two sides and middle part of contact cross-section are provided with shearing resistance stirrup, the contact cross-section
Top is provided with construction muscle, is disposed with main reinforcement perpendicular to contact cross-section, is provided with corner steel at four angles of the contact cross-section
Muscle, the shearing resistance stirrup, construction muscle, main reinforcement, cableway, corner reinforcing bar together constitute steel reinforcement cage, every block casting iron built-in fitting
Upper outside be equipped with multiple anchor supports, each anchor support by with the vertically disposed pre-buried support dowel of contact cross-section
It is connect with steel reinforcement cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821764862.1U CN209244580U (en) | 2018-10-30 | 2018-10-30 | A kind of high-bearing capacity shield tunnel segment joint structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821764862.1U CN209244580U (en) | 2018-10-30 | 2018-10-30 | A kind of high-bearing capacity shield tunnel segment joint structure |
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| CN209244580U true CN209244580U (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184741A (en) * | 2018-10-30 | 2019-01-11 | 上海市政工程设计研究总院（集团）有限公司 | A kind of high-bearing capacity shield tunnel segment joint structure |
-
2018
- 2018-10-30 CN CN201821764862.1U patent/CN209244580U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184741A (en) * | 2018-10-30 | 2019-01-11 | 上海市政工程设计研究总院（集团）有限公司 | A kind of high-bearing capacity shield tunnel segment joint structure |
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