CN104929659A - Bi-arched tunnel middle-partition top surrounding rock strengthening system - Google Patents
Bi-arched tunnel middle-partition top surrounding rock strengthening system Download PDFInfo
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- CN104929659A CN104929659A CN201510267541.5A CN201510267541A CN104929659A CN 104929659 A CN104929659 A CN 104929659A CN 201510267541 A CN201510267541 A CN 201510267541A CN 104929659 A CN104929659 A CN 104929659A
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- tunnel
- grouting pipe
- surrounding rock
- median septum
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Abstract
The invention discloses a bi-arched tunnel middle-partition top surrounding rock strengthening system. The bi-arched tunnel middle-partition top surrounding rock strengthening system is characterized in that grouting pipes are arranged in a middle-partition top surrounding rock; the grouting pipes are hit into the middle-partition top surrounding rock from a left tunnel and a right tunnel after primary support is completed; the included angle of the angle of the sprouting pipes and the horizontal plane ranges from 0 degree to 10 degrees; the vertical distance between the position where the grouting pipes are hit into the primary support surface form one side and the top of a middle guiding cavity is 2d, wherein d equals to 1m; the horizontal distance between the positions where the grouting pipes are hit into the primary support surface and the primary support surface of the tunnel of the other side is D; the length of each grouting pipe is L; the thickness of the primary support is R; the L equals to 0.8D+R; the grouting pipes arranged on the same tunnel side are axially parallelly arranged along the tunnel, and the distance between the neighboring grouting pipes on the same tunnel side is 1m; one end of each grouting pipe is provided with a conehead while the other end is provided with an iron hoop; grouting holes are arranged in the wall of each grouting pipe.
Description
Technical field
The present invention relates to a kind of surrounding rock in double-arch tunneling hardened system, be specially a kind of double-arched tunnel median septum top surrounding rock consolidation system.
Background technology
Due to the existence in space between median septum and middle drift supporting and protection structure in double-arched tunnel engineering, also can not be completely closely knit even if slip casting is filled, thus cause median septum top country rock to have loosening phenomenon, if later stage constructing tunnel does not carry out grouting and reinforcing to this part rock mass, then can there is adverse effect to median septum top surrounding rock stability.
Summary of the invention
The present invention is directed in double-arched tunnel construction in later period process, easily cause median septum top wall rock loosening, affect the stability of median septum top country rock and develop a kind of double-arched tunnel median septum top surrounding rock consolidation system.
Technological means of the present invention is as follows:
A kind of double-arched tunnel median septum top surrounding rock consolidation system, at median septum top, country rock arranges Grouting Pipe.
Further, described Grouting Pipe squeezes into median septum top country rock from left tunnel and right tunnel after completing preliminary bracing.
Further, the angle after described Grouting Pipe squeezes into tunnel and the angle of horizontal plane are 0 ° ~ 10 °.
Further, the vertical distance of position and middle drift top that described Grouting Pipe squeezes into preliminary bracing face in tunnel, side is d, adjacent described Grouting Pipe squeezes into the position in preliminary bracing face in opposite side tunnel and the vertical distance at described middle drift top is 2d, wherein d=1m.
Further, described Grouting Pipe squeezes into the horizontal range between position, Tunnel face and opposite side Tunnel face is D; Described Grouting Pipe length is L; The thickness of preliminary bracing layer is R; Wherein L=0.8D+R.Because median septum top country rock is del, the Grouting Pipe being arranged on bottom is shorter than the Grouting Pipe being arranged on top.
Further, the Grouting Pipe being arranged on side, same tunnel axially be arranged in parallel along tunnel, and the distance between the adjacent Grouting Pipe of side, same tunnel is 1m.
Further, described Grouting Pipe one end is provided with conehead, and the other end is provided with iron hoop; Described slip casting tube wall is provided with slurry outlet.Grouting Pipe squeezes into tunnel by conehead from preliminary bracing face; In slurry outlet constructability, slurries spread in time, improve construction quality; After cast slurries complete, fixed by iron hoop and preliminary bracing layer.
Further, described Grouting Pipe external diameter is 42mm; Described Grouting Pipe wall thickness is 4mm.
Owing to have employed technique scheme, double-arched tunnel median septum top surrounding rock consolidation system provided by the invention, by arranging Grouting Pipe at median septum top country rock, it is reinforced further, the technical program is perfect to the one of double-arched tunnel median septum top surrounding rock consolidation, has remarkable result to raising double-arched tunnel resistance to overturning.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic diagram;
Fig. 2 is the portion of A shown in Fig. 1 enlarged drawing;
Fig. 3 is embodiment of the present invention Grouting Pipe structural representation.
In figure: 1, left tunnel, 2, right tunnel, 3, preliminary bracing layer, 30, preliminary bracing face, 4, Grouting Pipe, 40, conehead, 41, iron hoop, 42, slurry outlet, 5, middle drift, 6, median septum, 60, median septum top country rock.
Detailed description of the invention
Double-arched tunnel median septum top surrounding rock consolidation system shown in Fig. 1, arranges Grouting Pipe 4 at median septum top country rock 60.After preliminary bracing completes, form preliminary bracing layer 3, the inner surface of preliminary bracing is preliminary bracing face 30,30 squeezes into Grouting Pipe 4 respectively in left tunnel 1 and right tunnel 2 from preliminary bracing face, and cast slurries are to reinforce because median septum construct the loosening country rock in the median septum top that causes.
Fig. 2 is the enlarged drawing that in Fig. 1, embodiment of the present invention Grouting Pipe 4 squeezes into rear section, tunnel structure, and the angle that Grouting Pipe 4 squeezes into the angle behind tunnel and horizontal plane is 0 ° ~ 10 °.Grouting Pipe 4 squeezes into the position in preliminary bracing face 30 in tunnel, side and the vertical distance at middle drift 5 top is d, and adjacent Grouting Pipe 4 squeezes into the position in preliminary bracing face 30 in opposite side tunnel and the vertical distance at middle drift 5 top is 2d, wherein d=1m.Grouting Pipe 4 horizontal range squeezed between position, Tunnel face 30 and opposite side Tunnel face 30 is D; Grouting Pipe 4 length is L; The thickness of preliminary bracing layer 3 is R; Wherein L=0.8D+R.
The Grouting Pipe 4 being arranged on side, same tunnel axially be arranged in parallel along tunnel, and the distance between the adjacent Grouting Pipe 4 of side, same tunnel is 1m.As shown in Figure 3, Grouting Pipe 4 one end is provided with conehead 40 to the structure of Grouting Pipe 4, and the other end is provided with iron hoop 41, and Grouting Pipe 4 wall is provided with slurry outlet 42.Grouting Pipe 4 30 squeezes into tunnel by conehead 40 from preliminary bracing face, and in slurry outlet 42 constructability, slurries spread in time, improves construction quality; After cast slurries complete, fixed by iron hoop 41 and preliminary bracing layer 3.Grouting Pipe 4 external diameter is 42mm, and wall thickness is 4mm.
Owing to have employed technique scheme, double-arched tunnel median septum top surrounding rock consolidation system provided by the invention, by arranging Grouting Pipe at median septum top country rock 60, it is reinforced further, the technical program is perfect to the one of double-arched tunnel median septum top surrounding rock consolidation, has remarkable result to raising double-arched tunnel resistance to overturning.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. a double-arched tunnel median septum top surrounding rock consolidation system, is characterized in that arranging Grouting Pipe at median septum top country rock.
2. double-arched tunnel median septum top surrounding rock consolidation system according to claim 1, is characterized in that described Grouting Pipe squeezes into median septum top country rock from left tunnel and right tunnel after completing preliminary bracing.
3. double-arched tunnel median septum top surrounding rock consolidation system according to claim 1, it is characterized in that described Grouting Pipe squeeze into tunnel after angle and the angle of horizontal plane be 0 ° ~ 10 °.
4. double-arched tunnel median septum top surrounding rock consolidation system according to claim 1, the vertical distance that it is characterized in that position and middle drift top that described Grouting Pipe squeezes into preliminary bracing face in tunnel, side is d, adjacent described Grouting Pipe squeezes into the position in preliminary bracing face in opposite side tunnel and the vertical distance at described middle drift top is 2d, wherein d=1m.
5. double-arched tunnel median septum top surrounding rock consolidation system according to claim 1, is characterized in that the described Grouting Pipe horizontal range squeezed between position, Tunnel face and opposite side Tunnel face is D; Described Grouting Pipe length is L; The thickness of preliminary bracing layer is R; Wherein L=0.8D+R.
6. double-arched tunnel median septum top surrounding rock consolidation system according to claim 1, it is characterized in that the Grouting Pipe being arranged on side, same tunnel axially be arranged in parallel along tunnel, and the distance between the adjacent Grouting Pipe of side, same tunnel is 1m.
7. the double-arched tunnel median septum top surrounding rock consolidation system according to any one of claim 1 ~ 6, it is characterized in that described Grouting Pipe one end is provided with conehead, the other end is provided with iron hoop; Described slip casting tube wall is provided with slurry outlet.
8. double-arched tunnel median septum top surrounding rock consolidation system according to claim 7, is characterized in that described Grouting Pipe external diameter is 42mm; Described Grouting Pipe wall thickness is 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267541.5A CN104929659A (en) | 2015-05-22 | 2015-05-22 | Bi-arched tunnel middle-partition top surrounding rock strengthening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267541.5A CN104929659A (en) | 2015-05-22 | 2015-05-22 | Bi-arched tunnel middle-partition top surrounding rock strengthening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104929659A true CN104929659A (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510267541.5A Pending CN104929659A (en) | 2015-05-22 | 2015-05-22 | Bi-arched tunnel middle-partition top surrounding rock strengthening system |
Country Status (1)
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| CN (1) | CN104929659A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359932A (en) * | 2019-08-07 | 2019-10-22 | 西南石油大学 | One kind two serves as a contrast vault slip casting tube assembly and its grouting construction method |
| CN111425222A (en) * | 2020-04-27 | 2020-07-17 | 中国建筑第七工程局有限公司 | Method for protecting partition wall in multi-arch tunnel |
-
2015
- 2015-05-22 CN CN201510267541.5A patent/CN104929659A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 朱汉华等: "独立隧道、小净距隧道和连拱隧道结构受力独立性研究", 《隧道建设》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359932A (en) * | 2019-08-07 | 2019-10-22 | 西南石油大学 | One kind two serves as a contrast vault slip casting tube assembly and its grouting construction method |
| CN110359932B (en) * | 2019-08-07 | 2022-07-19 | 西南石油大学 | Two-lining vault grouting pipe assembly and grouting construction method thereof |
| CN111425222A (en) * | 2020-04-27 | 2020-07-17 | 中国建筑第七工程局有限公司 | Method for protecting partition wall in multi-arch tunnel |
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Application publication date: 20150923 |