CN214062956U - Support reinforced (rfd) tunnel quick construction structure based on drainage system - Google Patents
Support reinforced (rfd) tunnel quick construction structure based on drainage system Download PDFInfo
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- CN214062956U CN214062956U CN202023162204.5U CN202023162204U CN214062956U CN 214062956 U CN214062956 U CN 214062956U CN 202023162204 U CN202023162204 U CN 202023162204U CN 214062956 U CN214062956 U CN 214062956U
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Abstract
The utility model discloses a strut reinforced (rfd) tunnel quick construction structure based on drainage system, including last, in, lower step, first advance drilling, second advance drilling, preliminary bracing, invert, side wall, secondary lining, go up, in, lower step and form for three step method excavations, first advance drilling is seted up in the both sides of upper step, and the both sides at the middle step are seted up in the advance drilling of second, and preliminary bracing sets up in the tunnel hunch portion, the invert sets up at the arch bottom in tunnel, the side wall sets up the lateral wall in the tunnel, secondary lining sets up the top in the tunnel. The utility model discloses can get rid of the unnecessary groundwater in face the place ahead, guarantee to construct safely high-efficiently, can utilize this drainage system to form stable system of strutting again.
Description
Technical Field
The utility model relates to a tunnel engineering construction technical field, concretely relates to strut reinforced (rfd) quick construction structure in tunnel based on drainage system.
Background
In recent years, with the deep progress of tunnel construction, tunnel construction in complex sections still becomes a normal state. However, the tunnel construction method is restricted by various factors such as planning design and use requirements, topographic conditions and geological conditions, and the like, so that higher requirements are put on the safe construction of the tunnel. In the process of building tunnels in western mountainous areas, water-rich weak strata are common. At present, construction methods such as a step method and the like are commonly adopted in a water-rich weak stratum, but drainage operation combined with the construction methods is complex, construction progress is seriously slowed down, construction efficiency is reduced, and construction cost expenditure is greatly increased.
Therefore, how to combine drainage and strengthen tunnel support, improve tunnel construction efficiency and ensure tunnel construction safety becomes a problem which needs to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a strut reinforced (rfd) tunnel quick construction structure based on drainage system can get rid of the unnecessary groundwater in face front, guarantees to construct safely high-efficiently, can utilize this drainage system to form stable system of strutting again.
In order to achieve the purpose, the utility model provides an above-mentioned quick construction structure of tunnel based on drainage system struts reinforcement, including last, in, lower step, first leading drilling, second leading drilling, preliminary bracing, invert, side wall, secondary lining, go up in, down the step and form for three step method excavation, the both sides at the upper step are seted up to first leading drilling, and the both sides at the middle step are seted up to second leading drilling, and preliminary bracing sets up in the tunnel hunch portion, the invert sets up at the arch bottom in tunnel, the side wall sets up the lateral wall in tunnel, secondary lining sets up the top in tunnel.
Preferably, the primary support comprises concrete sprayed on the surface of the tunnel, a radial anchor rod, an upper step arch frame, a middle step arch frame, a first large arch springing of a lower step arch frame, a second large arch springing, a first foot locking anchor rod and a second foot locking anchor rod, wherein the radial anchor rod is radially arranged in the wall of the tunnel, the upper step arch frame is arranged at the tunnel arch part of the upper step, the middle step arch frame is arranged at the tunnel arch part of the middle step, the lower step arch frame is arranged at the tunnel arch part of the lower step, the first large arch springing is arranged at a first advanced drilling hole and connected with the upper step arch frame, the second large arch springing is arranged at a second advanced drilling hole and connected with the middle step arch frame, the first foot locking anchor rod is arranged at the arch springing part of the upper step arch frame, and the second foot locking anchor rod is arranged at the arch springing part of the middle step arch frame.
Furthermore, the upper step arch frame, the middle step arch frame and the lower step arch frame are all provided with reinforcing steel bar nets.
Preferably, the upper, middle and lower steps are distributed in a step shape.
Furthermore, the longitudinal sections of the upper step, the middle step and the lower step respectively account for one third of the section of the tunnel.
Preferably, the first pilot borehole and the second pilot borehole are both parallel to the ground along the tunnel direction.
Furthermore, the first advance drilling hole and the second advance drilling hole are internally provided with drain pipes.
Furthermore, the first pilot drill hole and the second pilot drill hole are both 20-30m long, and the aperture is 100 mm.
Preferably, first big hunch foot, the big hunch foot of second all include bracing, stull, bottom sprag, the bracing slope sets up, and the stull level sets up, and the stull welding is at the top welding of bottom sprag, the one end and the last step bow member welding of the bracing of first big hunch foot, the other end and the stull welding of first big hunch foot, the one end and the well step bow member welding of the bracing of the big hunch foot of second, the other end and the stull welding of the big hunch foot of second.
Furthermore, the inclined strut and the cross strut are both I-shaped steel, and the bottom strut is a steel plate.
Compared with the prior art, the utility model discloses following technological effect has:
1. the utility model can discharge the excessive underground water in front of the tunnel face, and ensure the safe and efficient construction;
2. the utility model discloses can utilize this drainage system to form stable system of strutting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic perspective view, partially in section, of an embodiment;
FIG. 2 is a schematic cross-sectional structure of the embodiment;
FIG. 3 is a schematic structural view of a first great arch foot and a second great arch foot of the embodiment;
icon: 1-upper step, 2-middle step, 3-lower step, 4-first advanced drilling hole, 5-second advanced drilling hole, 6-radial anchor rod, 7-upper step arch centering, 8-middle step arch centering, 9-first large arch springing, 10-second large arch springing, 11-first locking anchor rod, 12-second locking anchor rod, 13-reinforcing mesh, 14-inverted arch, 15-side wall, 16-secondary lining, 17-diagonal bracing, 18-cross bracing, 19-bottom bracing and 20-lower step arch centering.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Examples
The utility model provides a strut reinforced (rfd) tunnel quick construction structure based on drainage system, includes upper, middle and lower step 1, 2, 3, first advance drilling 4, second advance drilling 5, preliminary bracing, invert 14, side wall 15, secondary lining 16, upper, middle and lower step 1, 2, 3 are three step method excavation and form, first advance drilling 4 is seted up in the both sides of upper ledge 1, and second advance drilling 5 is seted up in the both sides of middle ledge 2, and preliminary bracing sets up in the tunnel hunch portion, invert 14 sets up at the hunch end in the tunnel, side wall 15 sets up the lateral wall in the tunnel, secondary lining 16 sets up the top in the tunnel.
The primary support comprises concrete sprayed on the surface of a tunnel, a radial anchor rod 6, an upper step arch centering 7, a middle step arch centering 8, a lower step arch centering 20, a first large arch springing 9, a second large arch springing 10, a first locking bolt 11 and a second locking bolt 12, wherein the radial anchor rod 6 is radially arranged in the wall of the tunnel, the upper step arch centering 7 is arranged at the tunnel arch part of the upper step 1, the middle step arch springing 8 is arranged at the tunnel arch part of the middle step 2, the lower step arch centering 20 is arranged at the tunnel arch part of the lower step 3, the first large arch springing 9 is arranged at a first advanced drilling hole 4 and connected with the upper step arch centering 7, the second large arch springing 10 is arranged at a second advanced drilling hole 5 and connected with the middle step arch centering 8, the first locking bolt 11 is arranged at the arch springing part of the upper step arch centering 7, and the second locking bolt 12 is arranged at the arch springing part of the middle step arch centering 8.
The upper step arch centering 7, the middle step arch centering 8 and the lower step arch centering 20 are all provided with reinforcing steel bar nets 13.
The upper, middle and lower steps 1, 2 and 3 are distributed in a ladder shape.
The longitudinal sections of the upper, middle and lower steps 1, 2, 3 each account for one third of the tunnel cross section.
The first advance drilling hole 4 and the second advance drilling hole 5 are both parallel to the ground along the tunnel direction.
And drain pipes are arranged in the first advanced drilling hole 4 and the second advanced drilling hole 5.
The first advance drill hole 4 and the second advance drill hole 5 are both 20-30m long, and the aperture is 100 mm.
Big hunch foot of first big hunch foot 9, second 10 all include bracing 17, stull 18, bottom sprag 19, the slope of bracing 17 sets up, and 18 levels of stull set up, and 18 welds at the top welding of bottom sprag 19 of stull, the one end and the last step bow member 7 welding of the bracing 17 of first big hunch foot 9, the other end and the 18 welding of the stull of first big hunch foot 9, the one end and the 8 welding of well step bow member of the bracing 17 of second big hunch foot 10, the other end and the 18 welding of the stull of second big hunch foot 10.
The inclined strut 17 and the cross strut 18 are both I-shaped steel, and the bottom strut 19 is a steel plate.
With reference to fig. 1, fig. 2 and fig. 3, the specific implementation process of the present invention is:
according to the design of tunnel engineering, the tunnel face is divided into an upper step, a middle step and a lower step, wherein each step occupies one third of the excavation area of the tunnel and can be adjusted according to actual construction;
completing a first advanced drilling hole 4 and a second advanced drilling hole 5 through a drilling machine, exploring the front geology, and placing a water discharge pipe into the first advanced drilling hole 4 and the second advanced drilling hole 5 for water discharge operation, wherein the drilling hole and the water discharge pipe are parallel to the horizontal plane;
excavating an upper step 1 and spraying concrete, then radially driving radial anchor rods 6 along a tunnel, setting the circumferential distance between the radial anchor rods 6 to be 0.5m, erecting an upper step arch 7 on the upper step 1, paving a reinforcing mesh 13 on the upper step arch 7, arranging first foot-locking anchor rods 11 at arch feet on two sides, dismantling a drain pipe in a first advanced drilling hole 4 arranged at the arch foot of the upper step 1, expanding and excavating the first advanced drilling hole 4, arranging a first large arch foot 9 at the position, and finally spraying concrete again to the designed thickness, thereby forming the complete initial support of the upper step 1;
the middle step 2 starts to be excavated after the upper step 1 is excavated to one time of the hole diameter, concrete is sprayed primarily immediately after the middle step 2 is excavated, radial anchor rods 6 are radially driven into the middle step 2, the circumferential distance between the radial anchor rods 6 is 0.5m, a middle step arch 8 is erected on the middle step 2, a reinforcing mesh 13 is laid on the middle step arch 8, the middle step arch 8 is welded with an upper step arch 7, second foot locking anchor rods 12 are arranged at arch feet at two sides, a drain pipe arranged in a second advanced drilling hole 5 at the arch foot of the middle step 2 is dismantled, the second advanced drilling hole 5 is expanded and excavated, a second large arch foot 10 is arranged at the position, and finally, the concrete is sprayed again to the designed thickness, so that the complete initial support of the middle step 2 is formed;
the lower step 3 begins to be excavated after the middle step 2 is excavated to one time of the hole diameter, the concrete is primarily sprayed immediately after the middle step 2 is excavated, a lower step arch 20 is erected on the lower step 3, a reinforcing mesh 13 is laid on the lower step arch 20, the lower step arch 20 is welded with the middle step arch 8, and the concrete is sprayed again to the designed thickness to form a complete primary support;
then constructing an inverted arch 14 and a side wall 17;
and finally, constructing a secondary lining 16.
Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.
Claims (10)
1. The utility model provides a strut reinforced (rfd) tunnel rapid construction structure based on drainage system which characterized in that: including upper, middle and lower step (1, 2, 3), first advance drilling (4), second advance drilling (5), preliminary bracing, invert (14), side wall (15), secondary lining (16), upper, middle and lower step (1, 2, 3) are three step method excavation and form, the both sides at upper ledge (1) are seted up in first advance drilling (4), and the both sides at middle ledge (2) are seted up in second advance drilling (5), and preliminary bracing sets up in the tunnel hunch portion, invert (14) set up at the hunch end in the tunnel, side wall (15) set up the lateral wall in the tunnel, secondary lining (16) set up the top in the tunnel.
2. The drainage system based support reinforced tunnel rapid construction structure of claim 1, characterized in that: the primary support comprises concrete sprayed on the surface of a tunnel, a radial anchor rod (6), an upper step arch centering (7), a middle step arch centering (8), a lower step arch centering (20), a first large arch centering (9), a second large arch centering (10), a first locking anchor rod (11) and a second locking anchor rod (12), wherein the radial anchor rod (6) is radially arranged in the wall of the tunnel, the upper step arch centering (7) is arranged at the tunnel arch part of the upper step (1), the middle step arch centering (8) is arranged at the tunnel arch part of the middle step (2), the lower step arch centering (20) is arranged at the tunnel arch part of the lower step (3), the first large arch centering (9) is arranged at a first advanced drilling hole (4) and connected with the upper step arch centering (7), the second large arch centering (10) is arranged at a second drilling hole (5) and connected with the middle step arch centering (8), and the first locking anchor rod (11) is arranged at the step arch centering (7), the second foot-locking anchor rod (12) is arranged at the arch foot of the middle step arch center (8).
3. The drainage system based support reinforced tunnel rapid construction structure of claim 2, characterized in that: and reinforcing steel bar meshes (13) are arranged on the upper step arch frame (7), the middle step arch frame (8) and the lower step arch frame (20).
4. The drainage system based support reinforced tunnel rapid construction structure of claim 1, characterized in that: the upper, middle and lower steps (1, 2, 3) are distributed in a ladder shape.
5. The drainage system-based support-reinforced tunnel rapid construction structure according to claim 1 or 4, wherein: the longitudinal sections of the upper, middle and lower steps (1, 2, 3) respectively account for one third of the section of the tunnel.
6. The drainage system based support reinforced tunnel rapid construction structure of claim 1, characterized in that: the first advance drilling hole (4) and the second advance drilling hole (5) are parallel to the ground along the tunnel direction.
7. The drainage system-based support-reinforced tunnel rapid construction structure according to claim 1 or 6, wherein: and drain pipes are arranged in the first advance drilling hole (4) and the second advance drilling hole (5).
8. The drainage system based support reinforced tunnel rapid construction structure of claim 7, wherein: the first advance drill hole (4) and the second advance drill hole (5) are both 20-30m long, and the aperture is 100 mm.
9. The drainage system based support reinforced tunnel rapid construction structure of claim 2, characterized in that: first big hunch foot (9), the big hunch foot of second (10) all include bracing (17), stull (18), bottom sprag (19), bracing (17) slope sets up, and stull (18) level sets up, and stull (18) welding is at the top welding of bottom sprag (19), the one end and the last step bow member (7) welding of bracing (17) of first big hunch foot (9), the other end and stull (18) welding of first big hunch foot (9), the one end and the welding of well step bow member (8) of stull (17) of the big hunch foot of second (10), the other end and the stull (18) welding of the big hunch foot of second (10).
10. The drainage system based support reinforced tunnel rapid construction structure of claim 9, wherein: the inclined strut (17) and the cross strut (18) are both I-shaped steel, and the bottom strut (19) is a steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023162204.5U CN214062956U (en) | 2020-12-24 | 2020-12-24 | Support reinforced (rfd) tunnel quick construction structure based on drainage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023162204.5U CN214062956U (en) | 2020-12-24 | 2020-12-24 | Support reinforced (rfd) tunnel quick construction structure based on drainage system |
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| CN214062956U true CN214062956U (en) | 2021-08-27 |
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| CN202023162204.5U Active CN214062956U (en) | 2020-12-24 | 2020-12-24 | Support reinforced (rfd) tunnel quick construction structure based on drainage system |
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