CN208578574U - A kind of nine supporting construction of double -side approach - Google Patents
A kind of nine supporting construction of double -side approach Download PDFInfo
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- CN208578574U CN208578574U CN201820930118.8U CN201820930118U CN208578574U CN 208578574 U CN208578574 U CN 208578574U CN 201820930118 U CN201820930118 U CN 201820930118U CN 208578574 U CN208578574 U CN 208578574U
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Abstract
The utility model discloses a kind of nine supporting construction of double -side approach, the supporting construction includes preliminary bracing structure and temporary support structures in tunnel piercing section, the preliminary bracing structure steel mesh circumferentially disposed by tunnel, and the bottom arch and mural arch of abutting steel mesh collectively constitute, temporary support structures are formed by be arranged between supporting construction in the early stage two layers interim horizontal arch and the interim perpendicular arch interconnection of two column, and pilot tunnel is divided into 9 pilot tunnels of nine grids shape by circumferential supporting construction and temporary support structures jointly；The mural arch includes side arch and crown, to the grouting with small pipe reinforcing layer for being provided with advance support within the scope of the 150-180 degree of mural arch top before excavating.The safety of construction is enhanced, the usage amount of supporting fashioned iron has been saved.
Description
Technical field
The utility model belongs to technical field of tunnel construction, in particular to applies for weak surrounding rock geological conditions tunnel excavation
A kind of nine supporting construction of double -side approach of work.
Background technique
For the construction of big cross section Support System in Soft Rock Tunnels, double -side approach construction method is typically now used, is a side
Excavate the construction technology of side supporting.Concrete principle is that entire tunnel big cross section is divided into left, center, right using two median septums is 3 small
Section construction, left and right pilot tunnel is leading, and mid-section is immediately after；After inverted arch of primary support cyclization, removes two sides pilot tunnel and temporarily prop up
Support forms tunneling boring.This method is primarily adapted for use in the stratum such as viscous soil horizon, layer of sand, sand gravel layer.Traditional double -side approach excavates
Method tends to obtain good effect in terms of ensureing excavation safety, control deformation；But it is more that there are temporary supports, support knot
Structure intensity shortcoming, and tear that support is difficult, and construction risk is big, and working space is narrow, and construction speed is slow open, construction cost is higher etc. asks
Topic, the fashioned iron consumption of especially temporary support is especially big, and the stability of the preliminary bracing structure on periphery is not secured enough.
Utility model content
The purpose of this utility model is that: for the above technical problems, provide a kind of double -side approach nine
Supporting construction greatly strengthens the safety of construction, has saved the usage amount of supporting fashioned iron, and increases integer support structure
Strength and stability.
The technical solution of the utility model technology is achieved in that a kind of nine supporting construction of double -side approach, described
Supporting construction includes preliminary bracing structure and temporary support structures in tunnel piercing section, and the preliminary bracing structure is by tunnel ring
It is collectively constituted to the bottom arch and mural arch of the steel mesh of arrangement, and abutting steel mesh, temporary support structures are propped up in the early stage by being arranged
Two layers of interim horizontal arch and the interim perpendicular arch interconnection of two column between protection structure form, circumferential supporting construction and temporary support structures
Jointly by pilot tunnel be divided into the upper left of nine grids shape, left, lower-left, in it is upper, in, under, upper right, right neutralization bottom right 9 lead
Hole；The mural arch includes side arch and crown, to small provided with advance support within the scope of the 150-180 degree of mural arch top before excavating
Conduit grouting and reinforcing layer.
Nine supporting construction of double -side approach described in the utility model, the side arch and bottom arch are 3 segmentation structures, often
Section side arch corresponds respectively to the single pilot tunnel of tunnel two sides, and every section of bottom arch corresponds respectively to the single pilot tunnel of tunnel bottom, crown
Upper pilot tunnel in individually corresponding to.
Nine supporting construction of double -side approach described in the utility model, the interim perpendicular arch is 3 segmentation structures, and every section is faced
When perpendicular arch a pilot tunnel is respectively corresponded at left and right sides of it.
Nine supporting construction of double -side approach described in the utility model, the interim horizontal arch are three stage structure, every section
Interim horizontal arch respectively corresponds a pilot tunnel in downside on it.
Nine supporting construction of double -side approach described in the utility model, upper and middle middle drift is by interim perpendicular arch in described
Two sides be provided with the grouting with small pipe reinforcing layer of advance support.
Nine supporting construction of double -side approach described in the utility model, the junction between the arch of the side is to tunnel wall
Lock foot anchor tube is squeezed into, side arch is reinforced fixing in junction and lock foot anchor tube；The junction of the interim perpendicular arch to middle part also
The pilot tunnel not excavated is oblique to have squeezed into lock foot anchor tube, and interim perpendicular arch is reinforced fixing in its junction and lock foot anchor tube.
Nine supporting construction of double -side approach described in the utility model, the bottom arch, side arch and crown are by I-steel
Production, the arch springing of the side arch and the connection type of tunnel bottom are that the hole skirt along lower-left and bottom right pilot tunnel is laid with longitudinal direction
Channel steel, the arch springing end of side arch are welded with side arch abutment plate, are equipped with rubber mat plate between side arch abutment plate and longitudinal channel steel, and pass through bolt
The side arch abutment plate, longitudinal channel steel and rubber mat plate are connected and fixed, the longitudinal direction channel steel tunnel longitudinally will it is several it is uniform between
Every side arch link into an integrated entity.
Nine supporting construction of double -side approach described in the utility model, in the side, the junction of arch and bottom arch, passes through
The side buttress plate that side arch is arranged in and the bottom arch abutment plate that bottom arch abutment portion is arranged in are connected and fixed by bolt, and side buttress plate and bottom arch
Rubber mat plate is provided between end plate.
Nine supporting construction of double -side approach described in the utility model, the unilateral side two sections of sides arch between by side arch
End plate carries out being bolted fixation, and is provided with longitudinal channel steel between two side arch abutment plates of two sections of sides arch junction, described
The two sides up and down of longitudinal channel steel are provided with rubber mat plate, and the longitudinal direction channel steel is longitudinal by several evenly spaced sides arches in tunnel
It links into an integrated entity.
Nine supporting construction of double -side approach described in the utility model finish excavation and remove temporary support structures
Secondary masonry reinforcing layer is arranged in every section of tunnel afterwards on tunnel wall surface and bottom surface, on the secondary masonry reinforcing layer of bottom surface also
It is provided with bottom plate backfill layer.
The utility model has the following beneficial effects: by the way that the excavation face in tunnel is divided into 9 pilot tunnel regions, it can be right simultaneously
Different regions are constructed, and improve construction efficiency and progress, while combining phase by two interim horizontal arches and interim perpendicular arch
The reinforcing of the lock foot anchor tube of pass further reduced the safety of construction so that whole structural strength is remarkably enhanced
Risk；Installation between interim horizontal arch and interim perpendicular arch uses flexible detachable structure, and interim horizontal arch and interim perpendicular arch
It is all made of bolted detachable structure between mural arch and bottom arch, the efficiency of installation and removal greatly improved, meanwhile, also
The interim horizontal arch for being previously completed temporary support and disassembling and interim perpendicular arch can be used for the section of subsequent excavation, greatlyd save
The usage amount of fashioned iron, reduces the overall material cost of engineering；It will be several in the bottom in tunnel and waist by longitudinal channel steel
Evenly spaced side arch is connected to become entirety, further enhances the strength and stability of support construction, has reinforcement safety anti-
The effect of shield.
Detailed description of the invention
Fig. 1 is the utility model supporting construction overall schematic；
Fig. 2 is the utility model supporting construction rough schematic view；
Fig. 3 is that the fixed schematic diagram of arch springing is encircleed in the side of the utility model supporting construction；
Fig. 4 is that connection schematic diagram is encircleed at the side arch of the utility model supporting construction and bottom；
Fig. 5 is connection schematic diagram between the two sides arch of the utility model supporting construction.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model technology.It should be appreciated that specific embodiment described herein is only used to
It explains the utility model, is not used to limit the utility model.
As shown, nine supporting construction of double -side approach, the supporting construction includes initial stage branch in tunnel piercing section
Protection structure and temporary support structures, the preliminary bracing structure steel mesh circumferentially disposed by tunnel, and it is close to steel mesh
Bottom arch 1 and mural arch collectively constitute, and the mural arch includes side arch 2 and crown 3, and temporary support structures are by being arranged supporting construction in the early stage
Between two layers of interim horizontal arch 4 and two column, 5 interconnections of interim perpendicular arch form, circumferential supporting construction and temporary support structures are common
By pilot tunnel be divided into the upper left of nine grids shape, left, lower-left, in it is upper, in, under, upper right, right 9 pilot tunnels in neutralization bottom right；It opens
To the grouting with small pipe reinforcing layer 6 for being provided with advance support within the scope of the 150-180 degree of mural arch top before digging.
The side arch 2 and bottom arch 1 are 3 segmentation structures, and every section of side arch 2 corresponds respectively to the single pilot tunnel of tunnel two sides,
Every section of bottom arch 1 corresponds respectively to the single pilot tunnel of tunnel bottom, crown 3 individually correspond in upper pilot tunnel；The interim perpendicular arch 5 is
3 segmentation structures, every section of interim perpendicular arch 5 respectively correspond a pilot tunnel at left and right sides of it；The interim horizontal arch 4 is three-stage knot
Structure, every section of interim horizontal arch 4 respectively correspond a pilot tunnel in downside on it.
Upper and middle middle drift is reinforced by the grouting with small pipe that the two sides of interim perpendicular arch 5 are provided with advance support in described
Layer 7.
Lock foot anchor tube 8 has been squeezed into tunnel wall in junction between two sections of sides arch 2, and side arch 2 is in junction and lock
Foot anchor tube 8 is reinforced fixing；Foot anchor tube is locked in oblique squeezed into of pilot tunnel that the junction of the interim perpendicular arch 5 is not excavated also to middle part
8, interim perpendicular arch 5 is reinforced fixing in its junction and lock foot anchor tube 8.
The bottom arch 1, side arch 2 and crown 3 are made by I-steel, the connection of the arch springing and tunnel bottom of the side arch 2
Mode is that the hole skirt along lower-left and bottom right pilot tunnel is laid with longitudinal channel steel 21, and the arch springing end of side arch 2 is welded with side arch abutment plate
22, it is equipped with rubber mat plate 23 between side arch abutment plate 22 and longitudinal channel steel 21, and by bolt 24 by the side arch abutment plate 22, vertical
It is connected and fixed to channel steel 21 and rubber mat plate 23.
It carries out being bolted fixation, and two sections of side arches 2 also by side arch abutment plate 22 between two sections of sides arch 2 of the unilateral side
It is provided with longitudinal channel steel 26 between two side arch abutment plates 22 of junction, the two sides up and down of longitudinal channel steel 26 are provided with rubber
Backing plate 23.The longitudinal direction channel steel 26 and longitudinal channel steel 21 can link into an integrated entity several evenly spaced sides arches 2 in tunnel longitudinal direction,
The interrelated and mutual support of different section upper support structure is enhanced in this way, so that integrated support is more secured and safe.
Side buttress plate 25 and the setting of side arch 2 will be arranged in by bolt 12 for the junction of arch 2 and bottom arch 1 in the side
It is connected and fixed in the bottom arch abutment plate 11 that 1 end is encircleed at bottom, and is provided with rubber mat plate 13 between side buttress plate 25 and bottom arch abutment plate 11.
Similar to the above, in other exemplary embodiments, interim perpendicular arch 5 is by erecting the wall on arch abutment plate and bottom arch 1 and mural arch
Plate carries out being bolted fixation, is bolted between every section of interim perpendicular arch 5 also by perpendicular arch abutment plate；Interim horizontal arch 4 passes through
Side buttress plate 25 on horizontal arch abutment plate and side arch 2 with height setting carries out being bolted fixation；Every section of interim horizontal arch 4 passes through cross
It arch abutment plate and is bolted with the perpendicular buttress plate of 5 junctions of interim perpendicular arch.Make interim horizontal arch 4 and interim perpendicular arch in this way
5 can carry out flowing use on the tunnel cross-section of front and back difference section, save the dosage of fashioned iron.
Every section of tunnel after temporary support structures is finished and removed for excavation, is arranged on tunnel wall surface and bottom surface secondary
Reinforcing layer 9 is built, bottom plate backfill layer 10 is additionally provided on the secondary masonry reinforcing layer 9 of bottom surface.
Tunnel excavation step are as follows:
1) upper left pilot tunnel one is excavated, preliminary bracing and interim perpendicular arch, interim horizontal arch are applied；
2) left pilot tunnel two is excavated, preliminary bracing and interim perpendicular arch, interim horizontal arch are applied；
3) upper right pilot tunnel three is excavated, preliminary bracing and interim perpendicular arch, interim horizontal arch are applied；
4) right middle drift four is excavated, preliminary bracing and interim perpendicular arch, interim horizontal arch are applied；
5) upper pilot tunnel five in excavating, applies preliminary bracing and interim horizontal arch；
6) middle drift six in excavating applies preliminary bracing and interim horizontal arch；
7) lower-left pilot tunnel seven is excavated, preliminary bracing and interim perpendicular arch are applied；
8) bottom right pilot tunnel eight is excavated, preliminary bracing and interim perpendicular arch are applied；
9) lower pilot tunnel nine, applies preliminary bracing in excavating.
Left and right pilot tunnel working face 8~10m of longitudinal pitch, top bar length are controlled in 5~7m, and Core Soil reserves 2~3m.
Tunnel cross-section is divided into 9 relatively independent sections by the way that interim perpendicular arch and interim horizontal arch is arranged in this way, i.e., 9 are led
Hole.9 pilot tunnels excavate respectively, and pilot drive face longitudinally keeps spacing, therefore earth excavation face at the same mileage tunnel cross-section
It is smaller, it is smaller to country rock disturbance, rock deformation caused by excavation construction is reduced, while each pilot tunnel is relatively independent, is convenient for
Multiple pilot tunnels are constructed simultaneously, improve drivage efficiency and working security.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of nine supporting construction of double -side approach, it is characterised in that: the supporting construction includes just in tunnel piercing section
Phase supporting construction and temporary support structures, the preliminary bracing structure steel mesh circumferentially disposed by tunnel, and it is close to reinforcing bar
The bottom arch and mural arch of net collectively constitute, and temporary support structures are by two layers be arranged between supporting construction in the early stage interim horizontal arch and two
The interim perpendicular arch interconnection of column forms, and pilot tunnel is divided into a left side for nine grids shape by circumferential supporting construction and temporary support structures jointly
Upper, left, lower-left, in it is upper, in, under, upper right, right 9 pilot tunnels in neutralization bottom right；The mural arch includes side arch and crown, is opened
To the grouting with small pipe reinforcing layer for being provided with advance support within the scope of the 150-180 degree of mural arch top before digging.
2. nine supporting construction of double -side approach according to claim 1, it is characterised in that: the side arch and bottom arch are
3 segmentation structures, every section of side arch correspond respectively to the single pilot tunnel of tunnel two sides, and every section of bottom arch corresponds respectively to the list of tunnel bottom
A pilot tunnel, crown individually correspond in upper pilot tunnel.
3. nine supporting construction of double -side approach according to claim 2, it is characterised in that: the interim perpendicular arch is 3 sections
Formula structure, every section of interim perpendicular arch respectively correspond a pilot tunnel at left and right sides of it.
4. nine supporting construction of double -side approach according to claim 3, it is characterised in that: the interim horizontal arch is three sections
Formula structure, every section of interim horizontal arch respectively correspond a pilot tunnel in downside on it.
5. nine supporting construction of double -side approach according to claim 4, it is characterised in that: it is upper in described and in lead
Hole is provided with the grouting with small pipe reinforcing layer of advance support by the two sides of interim perpendicular arch.
6. nine supporting construction of double -side approach according to claim 4, it is characterised in that: the company between the arch of the side
The place of connecing has squeezed into lock foot anchor tube to tunnel wall, and side arch is reinforced fixing in junction and lock foot anchor tube；In the company of the interim perpendicular arch
The pilot tunnel that the place of connecing is not excavated also to middle part is oblique to have squeezed into lock foot anchor tube, and interim perpendicular arch is reinforced solid in its junction and lock foot anchor tube
It is fixed.
7. nine supporting construction of double -side approach according to claim 4, it is characterised in that: the bottom arch, side arch and top
Arch is made by I-steel, and the arch springing of the side arch and the connection type of tunnel bottom are the hole wall along lower-left and bottom right pilot tunnel
Foot is laid with longitudinal channel steel, and the arch springing end of side arch is welded with side arch abutment plate, is equipped with rubber pad between side arch abutment plate and longitudinal channel steel
Plate, and be connected and fixed the side arch abutment plate, longitudinal channel steel and rubber mat plate by bolt, the longitudinal direction channel steel is in tunnel longitudinal direction
Several evenly spaced side arches are linked into an integrated entity.
8. nine supporting construction of double -side approach according to claim 4, it is characterised in that: in the side, arch and bottom are encircleed
The side buttress plate that side arch is arranged in and the bottom arch abutment plate that bottom arch abutment portion is arranged in are connected and fixed by junction by bolt, and side
Rubber mat plate is provided between buttress plate and bottom arch abutment plate.
9. nine supporting construction of double -side approach according to claim 4, it is characterised in that: between unilateral two sections of sides arch
It carries out being bolted fixation by side arch abutment plate, and is provided with longitudinal slot between two side arch abutment plates of two sections of sides arch junction
The two sides up and down of steel, the longitudinal direction channel steel are provided with rubber mat plate, the longitudinal direction channel steel tunnel longitudinally will it is several it is uniform between
Every side arch link into an integrated entity.
10. nine supporting construction of double -side approach according to claim 4, it is characterised in that: excavation is finished and torn open
Except every section of tunnel after temporary support structures, secondary masonry reinforcing layer is set on tunnel wall surface and bottom surface, in the secondary of bottom surface
It builds and is additionally provided with bottom plate backfill layer on reinforcing layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820930118.8U CN208578574U (en) | 2018-06-15 | 2018-06-15 | A kind of nine supporting construction of double -side approach |
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| CN201820930118.8U CN208578574U (en) | 2018-06-15 | 2018-06-15 | A kind of nine supporting construction of double -side approach |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700841A (en) * | 2019-10-30 | 2020-01-17 | 中交路桥华南工程有限公司 | Double-side-wall guide pit type excavation method for tunnel excavation |
| CN113309550A (en) * | 2021-05-19 | 2021-08-27 | 甘肃路桥建设集团有限公司 | Novel modular temporary support assembly structure for ultra-large section loess tunnel |
-
2018
- 2018-06-15 CN CN201820930118.8U patent/CN208578574U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700841A (en) * | 2019-10-30 | 2020-01-17 | 中交路桥华南工程有限公司 | Double-side-wall guide pit type excavation method for tunnel excavation |
| CN110700841B (en) * | 2019-10-30 | 2021-06-29 | 中交路桥华南工程有限公司 | Double-side-wall guide pit type excavation method for tunnel excavation |
| CN113309550A (en) * | 2021-05-19 | 2021-08-27 | 甘肃路桥建设集团有限公司 | Novel modular temporary support assembly structure for ultra-large section loess tunnel |
| CN113309550B (en) * | 2021-05-19 | 2024-02-27 | 甘肃路桥建设集团有限公司 | Modular temporary supporting and assembling structure for ultra-large section loess tunnel |
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