CN218376494U

CN218376494U - Tunnel lining reinforced structure in inclined stratum

Info

Publication number: CN218376494U
Application number: CN202221897822.0U
Authority: CN
Inventors: 彭德劲; 鹿存金; 张永顺; 汪泓; 孙亮亮; 傅鹤林; 于归
Original assignee: China Chemical Construction Investment Group Co ltd; Central South University
Current assignee: China Chemical Construction Investment Group Co ltd; Central South University
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2023-01-24
Anticipated expiration: 2032-07-22

Abstract

The utility model discloses a tunnel lining reinforced structure in slope stratum, it is through arranging a plurality of slant support piece along axial and vertical interval distribution in the tunnel, every slant support piece's inclination is the same and both ends support and lean on tunnel secondary lining with the inclination on slope stratum, can provide strong support for the tunnel when the tunnel structure in the slope stratum receives asymmetric formation pressure about, improve tunnel structure's force stability, and can also restrict tunnel structure's asymmetric deformation about, guarantee that the interior profile in the tunnel accords with the designing requirement, whole reinforced structure is simple, convenient to detach just can realize used repeatedly. In addition, the reinforcing anchor rods are obliquely inserted into the tunnel surrounding rock and connected with the primary support of the tunnel, the reinforcing anchor rods are connected with the adjacent stratums, and the adjacent stratums are connected into a whole, so that the overall stability of the stratums is improved, the possibility of bedding damage of the stratums around the tunnel is reduced, and the safety of the tunnel structure is further enhanced.

Description

Tunnel lining reinforced structure in inclined stratum

Technical Field

The utility model relates to a tunnel reinforcement technical field especially relates to a tunnel lining reinforced structure in slope stratum.

Background

When tunnel construction is carried out in an inclined stratum, due to the inclination of the stratum, compared with the situation of a horizontal stratum, the tunnel surrounding rock is deformed and stressed to present a phenomenon of left-right asymmetry, the tunnel stress can be more in a bias condition, the tunnel surrounding rock bedding sliding is easily caused under the condition, and the tunnel structure is damaged, so that the tunnel surrounding rock is strengthened in the inclined stratum, and the stress stability of the tunnel structure is improved. However, the traditional tunnel lining structure aims at horizontal strata, the stress and deformation conditions of the tunnel structure in inclined strata are not considered, and the traditional tunnel lining structure cannot be suitable for reinforcing the tunnel lining in inclined strata.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tunnel lining reinforced structure in slope stratum to solve the technical problem that traditional tunnel lining structure can't be applicable to the slope stratum.

According to the utility model discloses an aspect provides a tunnel lining reinforced structure in slope stratum, include along the axial direction interval setting in tunnel and be located the multiunit slant support piece on tunnel upper portion, every group slant support piece includes the many slant support pieces that set up along the vertical interval of section in tunnel, and every slant support piece moves towards along the rock stratum on slope stratum to set up and both ends support and lean on tunnel secondary lining.

Furthermore, the axial spacing distance between two adjacent groups of the oblique supporting pieces is 3 m-10 m.

Furthermore, two ends of the oblique supporting member are area expansion ends.

Further, rubber gaskets are arranged between the two ends of the oblique supporting piece and the tunnel secondary lining.

And furthermore, the tunnel wall rock reinforcing device also comprises a reinforcing anchor rod used for connecting adjacent stratums into a whole, one end of the reinforcing anchor rod is connected with the primary support of the tunnel, and the other end of the reinforcing anchor rod is obliquely inserted into the tunnel wall rock of the inclined stratum.

Further, the reinforcing anchor rods are arranged at the left and right arches and the arch shoulders of the tunnel.

Further, the mounted position of strengthening the stock is adjacent with the ordinary stock on the tunnel preliminary bracing, just the inclination of strengthening the stock and inserting the tunnel country rock is greater than the inclination of ordinary stock and inserting the tunnel country rock.

Furthermore, the diameter of the reinforced anchor rod is twice that of a common anchor rod, and the length of the reinforced anchor rod is 1.5 times that of the common anchor rod.

Furthermore, a group of reinforcing anchor rods are arranged at intervals of 3-10 m in the axial direction of the tunnel and are arranged corresponding to each group of inclined supporting pieces.

Further, the width of the oblique supporting piece is 20 cm-60 cm.

The utility model discloses has following effect:

the utility model discloses a tunnel lining reinforced structure in slope stratum, through arrange a plurality of slant support piece along axial and vertical interval distribution in the tunnel, every slant support piece's inclination is the same and both ends support and lean on tunnel secondary lining with the inclination on slope stratum, can support for the tunnel provides strong when tunnel structure in the slope stratum receives asymmetric formation pressure, improve tunnel structure's stress stability, and can also restrict asymmetric deformation about tunnel structure, guarantee that the interior profile of tunnel accords with the design requirement, whole reinforced structure is simple, convenient to detach and can realize used repeatedly.

In addition, the reinforcing anchor rods are obliquely inserted into the tunnel surrounding rock and are connected with the primary support of the tunnel, the reinforcing anchor rods are intersected with the inclined ground layers and connected with the adjacent ground layers, the adjacent ground layers are connected into a whole, the overall stability of the ground layers is improved, the possibility of bedding damage of the ground layers around the tunnel is reduced, and the safety of the tunnel structure is further enhanced.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic sectional structure view of a tunnel lining reinforcing structure in an inclined stratum according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the diagonal support member according to the preferred embodiment of the present invention.

Description of the reference numerals

1. Inclining the stratum; 2. a tunnel; 3. reinforcing the anchor rod; 4. primary supporting of the tunnel; 5. secondary lining of the tunnel; 6. an oblique support member; 7. a rubber gasket; 8. a common anchor rod; 9. an area enlarging end.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

As shown in fig. 1, the preferred embodiment of the utility model provides a tunnel lining reinforced structure in inclined stratum, include along the axial direction interval setting of tunnel 2 and lie in the multiunit diagonal support piece 6 on tunnel 2 upper portion, every group diagonal support piece 6 includes many diagonal support piece 6 that set up along the vertical interval of section in tunnel 2, every diagonal support piece 6 moves towards along the rock stratum in inclined stratum 1 to set up and both ends support and lean on tunnel secondary lining 5.

It can be understood, tunnel lining reinforced structure in the inclined stratum of this embodiment, through set up a plurality of slant support piece 6 along axial and vertical interval distribution in tunnel 2, every slant support piece 6's inclination is the same with the inclination of inclined stratum 1 and both ends support and lean on tunnel secondary lining 5, can provide strong support for tunnel 2 when tunnel structure in the inclined stratum 1 receives asymmetric stratum pressure about, improve tunnel structure's force stability, and can also restrict tunnel structure's asymmetric deformation about, guarantee that the interior profile of tunnel accords with the design requirement, whole reinforced structure is simple, convenient to detach and can realize used repeatedly.

It can be understood that the axial spacing distance between two adjacent sets of the oblique supporting members 6 is 3m to 10m, preferably 5m, and effective reinforcement of the whole tunnel structure can be realized by uniformly spacing multiple sets of the oblique supporting members 6 in the axial direction of the tunnel 2. The width of the oblique support member 6 is 20 cm-60 cm, so that stable supporting force can be provided, the lengths of the oblique support members 6 at different height positions are required to be matched with the inner diameter of the corresponding position in the tunnel 2, namely, the length of the oblique support member 6 is related to the vertical height position of the oblique support member on the cross section of the tunnel, and the length of the oblique support member 6 is generally between 100 cm-800 cm. In addition, each group of the diagonal support members 6 includes 3 to 5 diagonal support members 6, which can be selected as needed.

Alternatively, as shown in fig. 2, the two ends of the diagonal support member 6 are enlarged-area ends 9, so that the contact area with the tunnel secondary lining 5 can be increased, and the stability and reliability of the reinforced structure can be further improved. In addition, rubber gaskets 7 are further arranged between the two ends of the oblique supporting piece 6 and the tunnel secondary lining 5, so that on one hand, a buffering effect can be achieved, and on the other hand, firmness that the oblique supporting piece 6 abuts against the tunnel secondary lining 5 can be enhanced. Wherein, the inclined support member 6 is formed by transforming I-steel, and the strength of the inclined support member 6 is ensured.

Optionally, the tunnel lining reinforcing structure in the inclined ground layer further comprises a reinforcing anchor rod 3 for connecting adjacent ground layers into a whole, one end of the reinforcing anchor rod 3 is connected with the primary tunnel support 4, and the other end of the reinforcing anchor rod is obliquely inserted into the tunnel surrounding rock of the inclined ground layer 1. The reinforcing anchor rods 3 are obliquely inserted into the tunnel surrounding rock and connected with the tunnel primary support 4, the reinforcing anchor rods 3 are intersected with the inclined ground layer 1 and connected with the adjacent ground layers, the adjacent ground layers are connected into a whole, the integral stability of the ground layers is improved, the possibility of bedding damage of the ground layers around the tunnel is reduced, and the safety of the tunnel structure is further enhanced.

Wherein, strengthen stock 3 and set up in tunnel 2 about hunch waist department and hunch shoulder department, can effectively restrict tunnel structure's left and right sides asymmetric deformation, further strengthened tunnel structure's security. Moreover, the installation position (namely the starting end) of the reinforcing anchor rod 3 is adjacent to the common anchor rod 8 on the tunnel primary support 4, and the inclination angle of the reinforcing anchor rod 3 inserted into the tunnel surrounding rock is larger than the inclination angle of the common anchor rod 8 inserted into the tunnel surrounding rock. Wherein, the angle between the reinforced anchor rod 3 and the inclined ground layer 1 is 10-90 degrees. Optionally, the diameter of the reinforcing anchor rod 3 is twice that of the common anchor rod 8, and the length of the reinforcing anchor rod 3 is 1.5 times that of the common anchor rod 8, wherein, as a preferable scheme, the diameter of the reinforcing anchor rod 3 is 4 cm-10 cm, and the length of the reinforcing anchor rod is 5 m-8 m. In addition, every interval 3m ~ 10m sets up a set of enhancement stock 3 in the axial direction in tunnel 2 to correspond the setting with every group diagonal bracing piece 6, in the section department in tunnel 2, through a set of diagonal bracing piece 6 to the diagonal bracing in the tunnel and through a set of overall stability who strengthens stock 3 and improve the peripheral stratum in tunnel, one inside and outside mutually supports in coordination, has further promoted tunnel structure's force stability, has strengthened tunnel structure safety greatly.

It can be understood that the construction process of the tunnel lining reinforcing structure in the inclined stratum of the embodiment is as follows: firstly, excavating the tunnel profile according to the design requirement to form a tunnel working surface. And then, driving a common anchor rod into the ground layer around the tunnel along the contour of the tunnel and injecting cement grout. And then according to the running direction of the inclined ground layer, driving reinforcing anchor rods into the left arch waist, the right arch waist and the arch shoulder of the tunnel in a range of 10-90 degrees intersected with the inclined ground layer, injecting cement slurry, arranging a group of reinforcing anchor rods every 3-10 m along the running direction of the tunnel, and arranging common anchor rods according to the design requirements of the tunnel. And constructing primary tunnel support and secondary tunnel lining in sequence, and finally applying oblique supporting members in the tunnel according to the inclination angle of the inclined stratum, wherein 3-5 oblique supporting members are arranged on each section, and a group of oblique supporting members are arranged at intervals of 3-10 m along the direction of the tunnel. Compare in traditional tunnel lining structure, have that construction speed is fast, repeatedly usable and engineering cost is low advantage.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a tunnel lining reinforced structure in slope stratum, its characterized in that includes sets up and is located multiunit slant support piece (6) on tunnel (2) upper portion along the axial direction interval of tunnel (2), and every group slant support piece (6) include many slant support piece (6) that set up along the vertical interval of section in tunnel (2), and every slant support piece (6) move towards along the rock stratum of slope stratum (1) and set up and both ends support and lean on tunnel secondary lining (5).

2. The tunnel lining reinforcement structure in an inclined ground, according to claim 1, wherein the axial spacing distance between two adjacent sets of diagonal bracing members (6) is 3m to 10m.

3. The tunnel lining reinforcement structure in inclined ground as claimed in claim 1, wherein both ends of the diagonal support member (6) are enlarged area ends (9).

4. A tunnel lining reinforcement structure in inclined ground as claimed in claim 3, characterized in that rubber gaskets (7) are further provided between both ends of the diagonal support (6) and the tunnel secondary lining (5).

5. The tunnel lining reinforcement structure in inclined ground formation according to claim 1, further comprising reinforcing anchor rods (3) for integrally connecting adjacent ground formations, wherein one end of the reinforcing anchor rods (3) is connected with the tunnel preliminary supports (4) and the other end is inserted obliquely into the tunnel surrounding rock of the inclined ground formation (1).

6. The tunnel lining reinforcement structure in inclined ground, according to claim 5, characterized in that the reinforcement anchors (3) are provided at the left and right arches and the spandrels of the tunnel (2).

7. The tunnel lining reinforcement structure in inclined ground, according to claim 6, wherein the reinforcing anchor (3) is installed adjacent to the general anchor (8) on the preliminary tunnel support (4) at an inclination angle at which the reinforcing anchor (3) is inserted into the tunnel surrounding rock greater than that at which the general anchor (8) is inserted into the tunnel surrounding rock.

8. The tunnel lining reinforcement structure in inclined ground, according to claim 7, characterized in that the reinforcement anchor (3) has a diameter twice that of the ordinary anchor (8) and a length 1.5 times that of the ordinary anchor (8).

9. A tunnel lining reinforcement structure in inclined ground formations according to claim 6, characterized in that one set of reinforcing anchor rods (3) is provided at intervals of 3m to 10m in the axial direction of the tunnel (2) and is provided corresponding to each set of diagonal bracing members (6).

10. The tunnel lining reinforcement structure in inclined ground as claimed in claim 1, wherein the width of the diagonal bracing member (6) is 20cm to 60cm.