CN208966352U - A kind of supporting construction in weak rocks matter region tunnel - Google Patents
A kind of supporting construction in weak rocks matter region tunnel Download PDFInfo
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- CN208966352U CN208966352U CN201821767321.4U CN201821767321U CN208966352U CN 208966352 U CN208966352 U CN 208966352U CN 201821767321 U CN201821767321 U CN 201821767321U CN 208966352 U CN208966352 U CN 208966352U
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Abstract
The utility model discloses a kind of supporting construction in weak rocks matter region tunnel, including preliminary bracing layer and the second stage of branch sheath, the preliminary bracing layer includes reinforced mesh one, anchor pole one and initial stage gunite concrete, the reinforced mesh one is covered on country rock surface using anchor pole one, one interval of anchor pole anchors into inside country rock, pipe canopy layer is equipped between the preliminary bracing layer and country rock, the initial stage gunite concrete connects reinforced mesh two far from the side of reinforced mesh one, the side of the separate reinforced mesh one of the reinforced mesh two is equipped with steel arch-shelf, the steel arch-shelf is multistage splicing construction, the steel arch-shelf both ends are equipped with connection supporting spring, anchor supporting plate is welded on the connection supporting spring, the anchor planker is equipped with anchor two, the second stage of gunite concrete is equipped on the outside of the steel movements and postures of actors.The utility model is a little: bilayer is equipped with shotcrete layer, forms integral structure, improves support strength.
Description
Technical field
The utility model relates to underground engineering technical field, in particular to a kind of supporting knots in weak rocks matter region tunnel
Structure.
Background technique
The probability that weak surrounding rock is plastically deformed is very high, and the headroom in the tunnel Chang Yinqi becomes smaller, and influences normal tunnel
Construction and use, since the geologic property of weak surrounding rock itself is loosely organized, and stability is very poor, this just determines it in tunnel
A degree of deformation will necessarily be generated in road construction.Due to weak surrounding rock stability is poor, after tunnel excavation, make
Original crustal stress balance is destroyed, and is deformed so as to cause country rock.During construction, if the method selected
It is improper, it can not only cause the deformation of engineering construction preliminary bracing structure, or even the safety accidents such as landslide that can cause tunnel.
Traditional Support System in Soft Rock Tunnels preliminary bracing structure generally uses single layer grid steel frame shotcrete or I-steel shotcrete, but
It is that under the action of high-ground stress, soft-rock slope is big with deformation early period, rate of deformation is fast, deformation duration length, deflection
The features such as big, existing general single layer grid steel frame shotcrete or I-steel bolt-spary supports structure are often difficult to resist, with excavation
The increase of section, construction risk sharply increase, and later period lining quality is difficult to ensure.
Utility model content
The technical problems to be solved in the utility model is to overcome the above technological deficiency, provides a kind of weak rocks matter region tunnel
Supporting construction.
In order to solve the above technical problems, technical solution provided by the utility model are as follows: a kind of weak rocks matter region tunnel
Supporting construction, including preliminary bracing layer and the second stage of branch sheath, the preliminary bracing layer include reinforced mesh one, anchor pole one and just
Phase gunite concrete, the reinforced mesh one are covered on country rock surface using anchor pole one, and one interval of anchor pole, which anchors into, encloses
It is described in side of the reinforced mesh one far from country rock inside rock, pipe canopy layer is equipped between the preliminary bracing layer and country rock,
The initial stage gunite concrete far from reinforced mesh one side connect reinforced mesh two, the reinforced mesh two it is separate
The side of reinforced mesh one is equipped with steel arch-shelf, and the steel arch-shelf is multistage splicing construction, and the steel arch-shelf both ends, which are equipped with, to be connected
Supporting spring is connect, the steel arch-shelf forms entirety by connecting supporting spring, welds anchor supporting plate, the anchor on the connection supporting spring
Part planker is equipped with anchor two, and the anchor planker is intermittently arranged between steel arch-shelf and reinforced mesh two, the reinforcing bar
Mesh sheet two is fixed on country rock using anchor two, and the second stage of gunite concrete is equipped on the outside of the steel movements and postures of actors.
The utility model compared with prior art the advantages of be: the second stage of branch sheath in support system is using big rigidity type
Steel supporting, can effectively resist the pressure of country rock, and solution has squeezed that die mould soft rock initial deformation is big, rate of deformation causes supporting unstability fastly
The problem of, to reduce the risk of construction, ensure the safety of construction, and bilayer is pinched and is all made of loopful radial grouting, has been formed
Soft rock mass consolidation is got up, improves the intensity of outer layer rock mass, give full play to the self-supporting of country rock by shotcrete layer.
As an improvement, being welded between the steel arch-shelf and connection supporting spring, connected between the connection supporting spring by screw
It connects, is completely embedded securely.
As an improvement, the steel arch-shelf is I-steel arch, U-shaped steel arch, H profile steel arch or grid steel arch-shelf.
As an improvement, the anchor pole one and reinforced mesh one form preliminary bracing layer, institute by initial stage gunite concrete
Anchor two, reinforced mesh two, steel arch-shelf and the second stage of gunite concrete stated form the second stage of branch sheath.
As an improvement, being equipped with the stiffening plate being interspersed on the reinforced mesh one and reinforced mesh two, set in this way
Meter is in order to which support effect is more stable.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the supporting construction in the utility model weak rocks matter region tunnel.
Fig. 2 is a kind of structural schematic diagram of the steel arch-shelf of the supporting construction in the utility model weak rocks matter region tunnel.
It is as shown in the figure: 1, reinforced mesh one, 2, anchor pole one, 3, initial stage gunite concrete, 4, pipe canopy layer, 5, reinforced mesh two
6, steel arch-shelf, 7, connection supporting spring, 8, anchor two, 8.1, anchor supporting plate, 9, the second stage of gunite concrete.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings.
A kind of supporting construction in weak rocks matter region tunnel, including preliminary bracing layer and the second stage of branch sheath, the initial stage
Branch sheath includes reinforced mesh 1, anchor pole 1 and initial stage gunite concrete 3, and the reinforced mesh 1 is covered using anchor pole 1
It covers on country rock surface, one 2 interval of anchor pole anchors into inside country rock, and it is described in side of the reinforced mesh 1 far from country rock,
Pipe canopy layer 4 is equipped between the preliminary bracing layer and country rock, the initial stage gunite concrete 3 is far from reinforced mesh 1
Side connects reinforced mesh 25, and the side of the separate reinforced mesh 1 of the reinforced mesh 25 is equipped with steel arch-shelf 6, described
Steel arch-shelf 6 be multistage splicing construction, 6 both ends of steel arch-shelf are equipped with connection supporting spring 7, and the steel arch-shelf 6 passes through connection
Supporting spring 7 forms entirety, and anchor supporting plate 8.1 is welded on the connection supporting spring 7, and the anchor planker 8.1 is equipped with anchor two
8, the anchor planker 8.1 is intermittently arranged between steel arch-shelf 6 and reinforced mesh 25, and the reinforced mesh 25 utilizes anchor
Part 28 is fixed on country rock, and the second stage of gunite concrete 9 is equipped on the outside of the steel movements and postures of actors 6.
It welds between the steel arch-shelf 6 and connection supporting spring 7, is connected by screw between the connection supporting spring 7.
The steel arch-shelf 6 is I-steel arch, U-shaped steel arch, H profile steel arch or grid steel arch-shelf.
The anchor pole 1 and reinforced mesh 1 forms preliminary bracing layer, the anchor by initial stage gunite concrete 3
Part 28, reinforced mesh 25, steel arch-shelf 6 and the second stage of gunite concrete 9 form the second stage of branch sheath.
The stiffening plate being interspersed is equipped on the reinforced mesh 1 and reinforced mesh 25.
Working principle of the utility model is: excavating country rock, excludes after loosening sillar, perform preliminary bracing layer, first use anchor pole
One 2 fix reinforced mesh 1 along country rock surface；Initial stage gunite concrete 3 is performed in one 1 exposed face of reinforced mesh, by initial stage
Support unit is integrally fixed with country rock；The second stage of supporting is performed, first positions reinforced mesh 25 in one 1 exposed face of reinforced mesh,
Steel arch-shelf 6 is positioned in 25 exposed face of reinforced mesh, steel arch-shelf 6 forms entirety by connecting supporting spring 7, close to reinforced mesh
Anchor planker 8.1 is welded on 25 connection supporting spring 7, and anchor 28 is passed through to the mesh and preliminary bracing layer of reinforced mesh 25, it will
Reinforced mesh 25 is anchored on country rock, is performed the second stage of gunite concrete 9 for all support units and is connected integral, preliminary bracing
Pipe canopy layer 4 is laid between layer and country rock.
The utility model and embodiments thereof are described above, this description is no restricted, shown in attached drawing
Be also one of the embodiments of the present invention, actual structure is not limited to this.All in all if this field
Those of ordinary skill is enlightened by it, without deviating from the purpose of the present invention, not inventively design with
The similar frame mode of the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (5)
1. a kind of supporting construction in weak rocks matter region tunnel, including preliminary bracing layer and secondary supporting layer, it is characterised in that: institute
The preliminary bracing layer stated includes reinforced mesh one (1), anchor pole one (2) and initial stage gunite concrete (3), the reinforced mesh one
(1) it is covered on country rock surface using anchor pole one (2), the anchor pole one (2) intermittently anchors into inside country rock, described in steel mesh
Side of the piece one (1) far from country rock is equipped with pipe canopy layer (4), the initial stage injection between the preliminary bracing layer and country rock
Concrete (3) connects reinforced mesh two (5) far from the side of reinforced mesh one (1), the separate steel of the reinforced mesh two (5)
The side of muscle mesh sheet one (1) is equipped with steel arch-shelf (6), and the steel arch-shelf (6) is multistage splicing construction, the steel arch-shelf (6)
Both ends are equipped with connection supporting spring (7), and the steel arch-shelf (6) forms whole, described connection supporting spring (7) by connection supporting spring (7)
Upper welding anchor supporting plate (8.1), the anchor planker (8.1) are equipped with anchor two (8), and the anchor planker (8.1) exists
Intermittently it is arranged between steel arch-shelf (6) and reinforced mesh two (5), the reinforced mesh two (5) is fixed on using anchor two (8) to be enclosed
On rock, secondary injection concrete (9) are equipped on the outside of the steel arch-shelf (6).
2. a kind of supporting construction in weak rocks matter region tunnel according to claim 1, it is characterised in that: the steel arch
Frame (6) is welded with connecting between supporting spring (7), is connected by screw between the connection supporting spring (7).
3. a kind of supporting construction in weak rocks matter region tunnel according to claim 1, it is characterised in that: the steel arch
Frame (6) is I-steel arch, U-shaped steel arch, H profile steel arch or grid steel arch-shelf.
4. a kind of supporting construction in weak rocks matter region tunnel according to claim 1, it is characterised in that: the anchor pole
One (2) and reinforced mesh one (1) pass through initial stage gunite concrete (3) composition preliminary bracing layer, the anchor two (8), reinforcing bar
Mesh sheet two (5), steel arch-shelf (6) and secondary injection concrete (9) form secondary supporting layer.
5. a kind of supporting construction in weak rocks matter region tunnel according to claim 1, it is characterised in that: the reinforcing bar
The stiffening plate being interspersed is equipped on mesh sheet one (1) and reinforced mesh two (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821767321.4U CN208966352U (en) | 2018-10-29 | 2018-10-29 | A kind of supporting construction in weak rocks matter region tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821767321.4U CN208966352U (en) | 2018-10-29 | 2018-10-29 | A kind of supporting construction in weak rocks matter region tunnel |
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| CN208966352U true CN208966352U (en) | 2019-06-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307013A (en) * | 2019-08-09 | 2019-10-08 | 长沙理工大学 | A kind of unsymmetrial loading tunnel arch and unsymmetrial loading tunnel arch caunch structure |
| CN110513123A (en) * | 2019-09-26 | 2019-11-29 | 兰州交通大学 | A kind of tunnel support system suitable for weak broken wall rock |
| CN111764940A (en) * | 2020-07-03 | 2020-10-13 | 浙江省衢州市交通建设集团有限公司 | Double-layer primary supporting structure of weak surrounding rock tunnel and construction method thereof |
| CN113027466A (en) * | 2021-03-30 | 2021-06-25 | 中交一公局集团有限公司 | Underground excavation construction process for tunnel with extremely small clear distance |
-
2018
- 2018-10-29 CN CN201821767321.4U patent/CN208966352U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307013A (en) * | 2019-08-09 | 2019-10-08 | 长沙理工大学 | A kind of unsymmetrial loading tunnel arch and unsymmetrial loading tunnel arch caunch structure |
| CN110513123A (en) * | 2019-09-26 | 2019-11-29 | 兰州交通大学 | A kind of tunnel support system suitable for weak broken wall rock |
| CN110513123B (en) * | 2019-09-26 | 2021-07-06 | 兰州交通大学 | Tunnel supporting system suitable for weak broken country rock |
| CN111764940A (en) * | 2020-07-03 | 2020-10-13 | 浙江省衢州市交通建设集团有限公司 | Double-layer primary supporting structure of weak surrounding rock tunnel and construction method thereof |
| CN113027466A (en) * | 2021-03-30 | 2021-06-25 | 中交一公局集团有限公司 | Underground excavation construction process for tunnel with extremely small clear distance |
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