CN206144569U - Confined is advance in advance and is protected tunnel structure - Google Patents
Confined is advance in advance and is protected tunnel structure Download PDFInfo
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- CN206144569U CN206144569U CN201621208247.3U CN201621208247U CN206144569U CN 206144569 U CN206144569 U CN 206144569U CN 201621208247 U CN201621208247 U CN 201621208247U CN 206144569 U CN206144569 U CN 206144569U
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Abstract
The utility model relates to a tunnel construction technology field specifically indicates a confined is advance in advance and is protected tunnel structure. Include around the annular pipe -roof structure waiting to excavate tunnel limit outdrop side, the pipe -roof structure include the many steel pipes of laying along tunnel axis, many steel pipes along the circumferencial direction interval arrangement in tunnel around forming the loop configuration in the tunnel outside, connect through the steel sheet between the adjacent steel pipe and form confined annular supporting construction in advance. The utility model has the advantages of simple structure, construction convenience can form stable tunnel excavation and advance in advance and protect, is favorable to the rapid excavation in tunnel, and need not to carry out secondary lining, has reduced the cost of construction, has very big spreading value.
Description
Technical field
This utility model is related to tunneling technology field, in particular to a kind of pre support tunnel structure of closing.
Background technology
Shallow embedding weak soil large span Tunneling by mining method is always the engineering roadblock that tunnel professional field is present, its main construction
Difficult point is：Soft stratum self-stability is poor, and the stratum deformation that constructing tunnel causes is difficult to control to, and easily contraction is invaded to excavate hole footpath
Limit, while causing the sedimentation of earth's surface larger.
Existing shallow embedding Tunneling by mining method strengthens support rigidity typically using advance supports such as pipe canopy, slip castings, then adopts
Piecemeal excavates to reduce and excavate every time the methods such as the span in tunnel to control stratum deformation.Above existing technological means can meet typically
Under the conditions of Shallow Large Span Tunneling by mining method, it is but high in settlement request, in the case of engineering-environment complexity, there is following asking
Topic：
1) the leading pre-supporting measure such as existing pipe canopy, due to reasons such as diameter, pitch-limited, working procedure complexity, leads
The limited extent for causing advance support rigidity to increase；
2) the general preliminary bracing of Tunneling by mining method is in the form of shaped steel (grid steel frame)+gunite concrete, but due to
The laying spacing of shaped steel unsuitable too small (space otherwise between steelframe cannot gunite concrete), while what the size of shaped steel increased
Limited space, after tunnel excavation to this period for applying secondary lining, preliminary bracing is for the control energy of stratum deformation
Power is limited；
3) when being excavated using piecemeal, preliminary bracing is also required to block construction, and adjacent preliminary bracing is due on the engineering time
Difference, causes usually to produce linking difficulty between preliminary bracing after deformation, and then cannot form overall arch bearing structure, up to not
To expected rigidity.
For the problems referred to above, the large diameter steel pipe pipe applied to increase advance support and preliminary bracing rigidity a kind of at present
Curtain method gradually expanded application.In existing Engineering Projects, typically applied using push pipe or shield in the top of tunnel excavation scope
Work large diameter steel pipe pipe curtain, then in steel pipe using freezing, the auxiliary service market such as slip casting carry out stratum consolidation, or by steel pipe transverse
Cut, weld adjacent steel pipe and pouring reinforcement concrete forms the tunnel excavation being similar to below the supporting construction protection of shield arch.But
Method after above-mentioned improvement using when yet suffer from problems with：
1) the large diameter pipe curtain of construction still falls within advance support and the preliminary bracing in tunnel, still need to after the completion of its construction into
Row piecemeal is excavated and secondary lining is applied, for the duration affects larger；
Although 2) the pipe curtain after improving reinforces support rigidity, and lifting is larger, when excavating in soft soil layer, due to tunnel
Load action at the top of road when being transferred at pipe curtain arch springing, unavoidably produces stress concentration on pipe curtain, and soft stratum holds
Carry power generally relatively low, tunnel support structure integral sinking may be caused, and then cause ground settlement to increase.
Utility model content
What the purpose of this utility model sought to solve the prior art mentioned in above-mentioned background technology pays protection structure use in advance
There are problems that easily settling, need block construction to delay the duration, need to apply in tunneling, there is provided a kind of closing
Pre support tunnel structure.
The technical solution of the utility model is：A kind of pre support tunnel structure of closing, it is characterised in that：Including being centered around
Treat the ring pipe curtain structure on the outside of tunneling gauge；Described pipe curtain structure includes many steel laid along tunnel axis direction
Pipe, circumferencial direction arranged for interval of many steel pipes along tunnel be centered around tunnel clearance outside formed loop configuration, adjacent steel pipe it
Between be welded with steel plate of the two panels along tunnel circumferential directions；Radial direction of the two panels steel plate between described adjacent steel pipe along tunnel
Direction parallel interval arrangement, the space between two panels steel plate is by the mounting groove that is opened on the wall of steel pipe side and steel duct space
Connection, steel plate forms the ring-type being centered around on the outside of tunnel clearance with steel pipe and connects cavity；Steel has been poured in described connection cavity
Reinforced concrete.
Column is provided between two panels steel plate between further described adjacent steel pipe；Described column is along tunnel
The rod-like structure for supporting steel plate that radial direction is laid, the two ends of column are respectively welded on adjacent two block steel plate, are stood
Post is poured in concrete.
Axial direction of the steel plate between further described adjacent steel pipe along tunnel is continuously arranged.
In further described connection cavity many are equipped with along the spaced apart steel hoop of tunnel axial direction；Institute
Circumferencial direction of the steel hoop stated along tunnel is arranged in steel pipe and steel plate through mounting groove, and steel hoop is poured in coagulation
In native.
Further described pipe diameter meets personnel into its internal cutting, the space of pouring reinforcement concrete work
Require.
A kind of pre support tunnel structure construction method of closing, it is characterised in that：Described construction method includes following step
Suddenly：
1), on the outside of tunnel clearance to be excavated, along tunnel axial direction inserting piling steel pipe, in order to apply steel pipe straight at interval
The loop configuration being centered around to formation on the outside of tunnel clearance；
2), mounting groove is opened up in steel pipe side wall from steel duct, two blocks of steel plates is inserted in mounting groove, by the two ends of steel plate
It is respectively welded on adjacent two piece steel pipe, two blocks of steel plates are distributed along tunnel spaced radial, steel plate forms the ring of closing with steel pipe
Shape connects cavity；
3), workmen enters into the soil body that steel duct is excavated between two blocks of steel plates between adjacent steel pipe, at two pieces
Inner support is applied between steel plate；
4), to casting concrete in connection cavity, concrete flows into the interior armored concrete that formed and steel plate between of steel pipe and ties
Structure；
5) treat after the completion of concrete curing, complete the construction that protection structure is paid in tunnel in advance.
In further described step 1, the order of steel pipe inserting piling construction is：The steel of first inserting piling construction tunnel gauge bottom
Pipe, then the steel pipe of inserting piling construction tunnel gauge both sides, the steel pipe at the top of last inserting piling construction tunnel gauge.
In further described step 2, the construction method of the steel plate between adjacent steel pipe is：First construct positioned at tunnel limit
Steel plate under boundary between square steel tube, the steel plate between next construction tunnel gauge both sides steel pipe, last construction tunnel gauge top
Steel plate between steel pipe.
In further described step 3, the method that inner support is applied between two blocks of steel plates is：Between two blocks of steel plates
Welding column, on two blocks of steel plates that the two ends of column are respectively welded between adjacent two piece steel pipe, makes column in tunnel footpath
The supporting steel plate on direction.
In further described step 4, the method that casting concrete forms reinforced concrete structure into connection cavity
For：Circumferencial direction along tunnel in connection cavity sets up steel hoop, by reinforcement welding on the inwall of steel pipe, then to even
Casting concrete in logical cavity, concrete is flowed in steel pipe and forms armored concrete knot with column and reinforcing bar and steel plate between
Structure.
Advantage of the present utility model has：1st, large cross-section tunnel can be excavated and be converted into minor diameter shield tunneling by this patent, can
Effective control excavates the stratum deformation at initial stage.
2nd, this patent tunnel support structure rigidity is larger, and inside the supporting construction for being formed tunnel excavation is carried out, and can adopt
The mode of full face tunneling, can significantly improve constructing tunnel speed.
3rd, the structure of this patent bottom defines an entirety with superstructure, then act on tunnel structure in work progress
On load and the deadweight of structure itself can be born by the whole soil bodys in the range of the tunnel support structure of bottom, greatly reduce
The degree of stress concentration, can effective control tunnel when constructing bulk settling and the sedimentation and deformation of earth's surface.
4th, this patent defines the combinative structure of closing due to supporting construction, can be directly as permanent after the completion of construction
Lining cutting agent structure, saves the cost for applying secondary lining.
Simple structure of the present utility model, easy construction can form stable tunnel excavation pre support, be conducive to tunnel
Rapid Excavation, and secondary lining need not be carried out, the cost of construction is reduced, with great promotional value.
Description of the drawings
Fig. 1：Structural representation of the present utility model；
Fig. 2：Structure enlarged diagram of the present utility model；
Wherein：1-steel pipe；2-steel plate；3-column；4-reinforcing bar；5-concrete；6-connection cavity；7-mounting groove；
A-tunnel clearance.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail with specific embodiment.
Such as Fig. 1～2, a kind of pre support tunnel structure of closing treats tunneling gauge (such as institute in Fig. 1 including being centered around
The a for showing, is the track clearance in tunnel) on the outside of ring pipe curtain structure, the pipe curtain structure of the present embodiment is ring-type domes, tool
There is good stability, settle little, the position being particularly at below tunnel clearance, because ring pipe curtain is supported with bottom,
The pressure of pipe curtain structure top and both sides can be delivered to the bottom of pipe curtain structure and be dissipated, and increase equivalent in prior art
Lifting surface area, reduces pressure.
As shown in Fig. 1～2, the pipe curtain structure of the present embodiment includes many steel pipes 1 laid along tunnel axis direction, steel pipe
1 construction can be carried out using shield method or jacking, and circumferencial direction arranged for interval of many steel pipes 1 along tunnel is centered around tunnel
Road gauge outside forms loop configuration, and the annular for connecting formation closing by steel plate 2 between adjacent steel pipe 1 pays protection structure in advance.This
The internal diameter of steel pipe 1 of embodiment meets personnel into its internal cutting, the space requirement of pouring reinforcement concrete work.
Two panels steel plate 2 is provided between adjacent steel pipe 1, radial direction parallel interval of the two panels steel plate 2 along tunnel is arranged, steel
Circumferencial direction of the plate 2 along tunnel itself is laid, and the two ends of steel plate 2 are respectively welded at the outer wall of adjacent two piece steel pipe 1.The present embodiment
Steel plate 2 to install be first to be slotted from the inside of steel pipe 1, the side wall in steel pipe 1 by way of cutting opens up mounting groove 7,
Then the two ends of steel plate 2 are respectively welded at into mounting groove 7 along the both sides tube wall of tunnel radial direction, connecting by steel plate 2 will
All of steel pipe 1 is connected to become overall structure, and the space between two blocks of steel plates 2 connects to form annular with the inner space of steel pipe 1
Connection cavity 6.
The present embodiment is provided with column 3 between steel plate 2, and column 3 is for supporting steel along the laying of tunnel radial direction
The rod-like structure of plate 2, the two ends of column 3 are respectively welded on adjacent two block steel plate 2.By the supporting steel plate 2 of column 3, can
Strengthen steel plate 2 in the compressive strength along tunnel radial direction, it is to avoid in the case where pressure is excessive, two blocks of steel plates 2 are squeezed bad.
The present embodiment arranges continuous steel plate 2 between adjacent steel pipe 1, and axial direction of the steel plate 2 along tunnel is continuously arranged,
Therefore, the pipe curtain structure of the present embodiment only one of which connection cavity 6 on tunnel axial direction, by filling in connection cavity 6
Note concrete 5 forms the concrete reinforced pipe curtain structure being centered around on the outside of tunnel clearance.
In addition, being equipped with many along the spaced apart steel hoop 4 of tunnel axial direction, steel hoop 4 in connection cavity 6
Circumferencial direction along tunnel connects it as overall structure through all of steel pipe 1.Steel hoop 4 passes through institute by mounting groove 7
Between two blocks of steel plates 2 between some steel pipes 1 and adjacent steel pipe 1, steel hoop 4 is cast in concrete 5 and forms reinforced concrete
Soil structure, such setting can strengthen the intensity of whole pipe curtain structure.Column 3 is also cast in concrete 5.
Axial direction of the steel plate 2 of the present embodiment along tunnel runs through whole construction area, it is also possible to along between the axial direction in tunnel
Every arrangement plurality of steel plates 2, the arranged for interval of steel plate 2, in fact, the continuous structural stability for completely spreading steel plate 2 is more preferable.
The present embodiment forms reinforced concrete structure by the casting concrete 5 in connection cavity 6, is conducive to whole tunnel
The protection of road construction, it is to avoid the carrying out of secondary lining, high degree saves cost.
The pipe curtain structure construction method of the present embodiment is comprised the following steps：
1st, on the outside of tunnel clearance to be excavated, along tunnel axial direction inserting piling steel pipe 1, first inserting piling construction tunnel gauge bottom
The steel pipe 1 in portion, then the steel pipe 1 of inserting piling construction tunnel gauge both sides, the steel pipe 1 at the top of last inserting piling construction tunnel gauge, according to this
Sequence interval applies steel pipe 1 until forming the loop configuration being centered around on the outside of tunnel clearance,
2nd, mounting groove 7 is opened up in the side wall of steel pipe 1 from inside steel pipe 1, two blocks of steel plates 2, position of first constructing is inserted in mounting groove 7
In the steel plate 2 under tunnel clearance between square steel tube 1, secondly the steel plate 2 between construction tunnel gauge both sides steel pipe 1, finally constructs
Steel plate 2 between the steel pipe 1 of tunnel clearance top, according to the order successively construction steel plate 2, the two ends of steel plate 2 is respectively welded at
On two adjacent steel pipes 1, two blocks of steel plates 2 are distributed along tunnel spaced radial, and the annular that steel plate 2 forms closing with steel pipe 1 is connected
Cavity 6,
3rd, workmen is entered in steel pipe 1, the soil body between two blocks of steel plates 2 between adjacent steel pipe 1 is excavated, at two pieces
Column 3 is welded between steel plate 2, column 3 is made along the radial direction supporting steel plate 2 in tunnel,
4th, the circumferencial direction along tunnel in connection cavity 6 sets up steel hoop 4, and reinforcing bar 4 is welded on into the inwall of steel pipe 1
On,
5th, to connection cavity 6 in casting concrete, concrete flow into steel pipe 1 in and steel plate 2 between with reinforcing bar 4, the shape of column 3
Into reinforced concrete structure,
6 treat after the completion of concrete curing, complete the construction that protection structure is paid in tunnel in advance.
Ultimate principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Simply illustrate principle of the present utility model, this utility model can also on the premise of without departing from this utility model spirit and scope
There are various changes and modifications, these changes and improvements are both fallen within the range of claimed this utility model.This utility model will
Protection domain is asked to be defined by appending claims and its equivalent.
Claims (5)
1. the pre support tunnel structure of a kind of closing, it is characterised in that：Including being centered around the annular for the treatment of on the outside of tunneling gauge
Pipe curtain structure；Described pipe curtain structure includes many steel pipes (1) laid along tunnel axis direction, and many steel pipes (1) are along tunnel
Circumferencial direction arranged for interval be centered around tunnel clearance outside formed loop configuration, be welded with two panels edge between adjacent steel pipe (1)
The steel plate (2) of tunnel circumferential directions；Radial direction of the two panels steel plate (2) between described adjacent steel pipe (1) along tunnel
Parallel interval arranges that the space between two panels steel plate (2) is by the mounting groove (7) that is opened on the wall of steel pipe (1) side and steel pipe (1)
Inner space connects, and steel plate (2) forms the ring-type being centered around on the outside of tunnel clearance with steel pipe (1) and connects cavity (6)；Described company
Armored concrete (5) has been poured in logical cavity (6).
2. the pre support tunnel structure of a kind of closing as claimed in claim 1, it is characterised in that：Described adjacent steel pipe (1)
Between two panels steel plate (2) between be provided with column (3)；Described column (3) is for propping up along the laying of tunnel radial direction
The rod-like structure of support steel plate (2), the two ends of column (3) are respectively welded on adjacent two block steel plate (2), column (3) pour in
In concrete (5).
3. the pre support tunnel structure of a kind of closing as claimed in claim 2, it is characterised in that：Described adjacent steel pipe (1)
Between axial direction of the steel plate (2) along tunnel continuously arrange.
4. the pre support tunnel structure of a kind of closing as claimed in claim 1, it is characterised in that：Described connection cavity (6)
Many are inside equipped with along the spaced apart steel hoop of tunnel axial direction (4)；Circumference of the described steel hoop (4) along tunnel
Direction is arranged in steel pipe (1) and steel plate (2) through mounting groove (7), and steel hoop (4) is poured in concrete (5).
5. the pre support tunnel structure of a kind of closing as claimed in claim 1, it is characterised in that：Described steel pipe (1) internal diameter
Personnel are met into its internal cutting, the space requirement of pouring reinforcement concrete work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621208247.3U CN206144569U (en) | 2016-10-25 | 2016-10-25 | Confined is advance in advance and is protected tunnel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621208247.3U CN206144569U (en) | 2016-10-25 | 2016-10-25 | Confined is advance in advance and is protected tunnel structure |
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| Publication Number | Publication Date |
|---|---|
| CN206144569U true CN206144569U (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621208247.3U Active CN206144569U (en) | 2016-10-25 | 2016-10-25 | Confined is advance in advance and is protected tunnel structure |
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| Country | Link |
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| CN (1) | CN206144569U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351670A (en) * | 2016-10-25 | 2017-01-25 | 中铁第四勘察设计院集团有限公司 | Closed pre-support tunnel structure |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
-
2016
- 2016-10-25 CN CN201621208247.3U patent/CN206144569U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351670A (en) * | 2016-10-25 | 2017-01-25 | 中铁第四勘察设计院集团有限公司 | Closed pre-support tunnel structure |
| CN106351670B (en) * | 2016-10-25 | 2019-04-19 | 中铁第四勘察设计院集团有限公司 | A kind of closed pre support tunnel structure |
| CN110273696A (en) * | 2019-06-11 | 2019-09-24 | 中铁十四局集团第二工程有限公司 | A kind of tunnel or underground space claustra formula construction method |
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