Temporary supporting structure for tunnel deviation rectification

Abstract

The utility model provides a temporary support structure for tunnel deviation rectification, which comprises a first support component and a second support component which are arranged on the inner side of an existing tunnel, the first support component comprises a first arch foot box body, a first arch wall box body and a first temporary steel support, the first arch foot box body is fixedly connected to the current road surface of the existing tunnel, and the second arch wall box body is fixedly connected to the first temporary steel support. The first arch wall box body is connected to the top of the first arch springing box body, the first temporary steel support is arranged on the inner side of the first arch springing box body, one end of the first temporary steel support is in lap joint with a current road surface, the other end of the first temporary steel support is connected with the first arch wall box body, and one end of the second supporting assembly is connected with the outer wall of the first arch wall box body. And the other end is connected with an over-excavation side lining of the existing tunnel. The stability of the over-excavation side lining in the construction period can be effectively improved, high usability is achieved, the first arch foot box body and the first arch wall box body adopt a permanent and temporary combined supporting system, the cast-in-place time can be shortened, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel technical field especially a temporary support structure of tunnel deviation rectification. BACKGROUND

[0002] In the tunnel construction process, due to the influence of measurement error and various factors, the tunnel axis will appear deviation, especially for long tunnel, the measurement error will gradually accumulate in the tunnel construction process. When the two ends of the tunnel are excavated, if the measurement of both ends exists error, when the tunnel is penetrated, there will be a larger axis deviation. This penetration error may cause the tunnel to be unable to normally butt joint, and additional treatment is needed, such as expansion, adjustment of lining and other measures to make the tunnel meet the design requirements.

[0003] As shown in Figure 1 The current tunnel deviation rectification scheme for solving the above problems is as follows: according to the design requirements, the overbreak side temporary steel support 50 is constructed, the secondary lining and the initial support steel support (or grid steel frame) of the underbreak side are removed, the surrounding rock of the underbreak side is excavated to the design contour line, the new composite lining initial support is constructed, the C20 pumping concrete pipeline should be reserved on the overbreak side, the C20 concrete is pumped to backfill the overbreak side, the arch wall secondary lining is molded, the existing pavement and the bottom inverted arch are removed to the design contour line of the new lining inverted arch, and then the surrounding rock of the underbreak side inverted arch part is excavated to the design contour line. The bottom inverted arch secondary lining is constructed according to the design contour line, and after the inverted arch secondary lining concrete reaches the strength, the inverted arch backfill, the center water channel and the transverse water guide pipe are constructed according to the design drawing, and then the arch wall part secondary lining concrete is constructed.

[0004] In this construction scheme, the temporary support structure occupies the space of the new composite lining, which causes the temporary support to be removed before the new initial support is constructed, and there is a great construction risk.

[0005] Therefore, it is necessary to provide a temporary support structure of tunnel deviation rectification to solve or at least alleviate the above defects. CONTENT OF THE UTILITY MODEL

[0006] The main purpose of the utility model is to provide a temporary support structure of tunnel deviation rectification to solve the technical problem that the temporary support structure in the prior art occupies the space of the new composite lining, which causes the temporary support to be removed before the new initial support is constructed, and there is a great construction risk.

[0007] To achieve the above purpose, the utility model provides a temporary support structure of tunnel deviation rectification, which comprises a first support assembly and a second support assembly arranged on the inner side of an existing tunnel, wherein,

[0008] The first support assembly comprises a first arch foot box, a first arch wall box and a first temporary steel support, the first arch foot box is fixedly connected to the existing tunnel present road surface, the first arch wall box is connected to the top of the first arch foot box, the first temporary steel support is arranged on the inner side of the first arch foot box, one end of the first temporary steel support is overlapped on the present road surface, and the other end is connected with the first arch wall box.

[0009] One end of the second support assembly is connected with the outer wall of the first arch wall box, and the other end is connected with the overbreak side lining of the existing tunnel.

[0010] Preferably, the inner wall of the first arch foot box is provided with a first grouting hole, and the steel drill concrete is injected into the interior of the first arch foot box through the first grouting hole to form a first concrete filling layer.

[0011] Preferably, the inner wall of the first arch wall box is provided with a second grouting hole, and the steel drill concrete is injected into the interior of the first arch wall box through the second grouting hole to form a second concrete filling layer.

[0012] Preferably, the first temporary steel support is a corrugated steel plate, the extension direction of the corrugated steel plate is consistent with the extension direction of the newly-built tunnel, and the top of the corrugated steel plate is fixedly connected with the first arch wall box.

[0013] Preferably, the second support assembly comprises a plurality of I-shaped steels arranged at intervals along the extension direction of the newly-built tunnel, one end of each of the I-shaped steels is connected with the outer wall of the first arch wall box, and the other end is connected with the overbreak side lining of the existing tunnel.

[0014] Preferably, it further comprises a horizontal support assembly connected between the first arch wall box and the corrugated steel plate, the horizontal support assembly comprises a plurality of horizontal cross braces arranged at intervals along the extension direction of the newly-built tunnel, and each of the horizontal cross braces is detachably connected with the corrugated steel plate and the first arch wall box.

[0015] Preferably, a splicing groove is arranged on the inner side of the first arch wall box, an upper edge of the splicing groove is provided with a bevel, an upper end of the corrugated steel plate is provided with a channel steel, and the channel steel is connected at the bevel through bolts.

[0016] Preferably, a connecting port is arranged on the upper edge of the outer side of the first arch wall box, and the lower end of the I-shaped steel is connected at the connecting port.

[0017] Preferably, the bottom end of the corrugated steel plate is provided with an opening serving as an escape passage outlet.

[0018] Preferably, the size of the opening is 200*80cm, and the longitudinal interval is 5m.

[0019] Compared with the prior art, the tunnel deviation correction temporary support structure has the beneficial effects that

[0020] The utility model provides a kind of temporary support structure of tunnel deviation correction, including the first support assembly and second support assembly of being arranged in the inside of existing tunnel, first support assembly includes first arch foot box, first arch wall box and first temporary steel support, first arch foot box is fixedly connected on the present status road surface of existing tunnel, first arch wall box is connected in the top of first arch foot box, first temporary steel support is arranged in the inside of first arch foot box, one end of first temporary steel support is overlapped on present status road surface, and the other end is connected with first arch wall box, one end of second support assembly and the outer wall of first arch wall box is connected, and the other end and overbreak side lining of existing tunnel are connected.The application can effectively improve the stability of overbreak side lining during construction, and has strong usability, does not occupy new composite lining space in tunnel deviation correction process, first arch foot box, first arch wall box uses permanent and temporary combined support system (can be used as temporary support structure during construction, can also be used as permanent lining structure of new tunnel).Secondly, compared with the composite lining form of tunnel lining of prior art, the first arch foot box, first arch wall box and remaining box structure of the application adopt prefabricated box structure, which can reduce the pouring time on site and improve construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in these drawings without creative labor.

[0022] Figure 1 Schematic diagram of tunnel deviation correction scheme in prior art;

[0023] Figure 2 Application scenario diagram of the overall structure in an embodiment of the utility model;

[0024] Figure 3 A is Figure 2 Enlarged schematic view of A in

[0025] Figure 4 Structural schematic view after correction in an embodiment of the utility model.

[0026] The purpose of the utility model, functional characteristics and advantages will be further explained with reference to the drawings.

[0027] Explanation of reference numerals:

[0028] 10, existing tunnel; 110, existing road surface; 120, overbreak side lining; 20, first support assembly; 210, first arch foot box; 220, first arch wall box; 221, assembling groove; 230, first temporary steel support; 231, channel steel; 30, second support assembly; 40, newly-built tunnel; 50, overbreak side temporary steel support. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as described in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0033] Please refer to the drawings Figures 1 to 4The utility model provides a tunnel deviation rectification's temporary support structure in one embodiment, including the first support component 20 and the second support component 30 of being located in the inside of existing tunnel 10, wherein, the first support component 20 includes first arch foot box 210, first arch wall box 220 and first temporary steel support 230, first arch foot box 210 fixedly connected on the present situation road surface 110 of existing tunnel 10, first arch wall box 220 is connected in the top of first arch foot box 210, first temporary steel support 230 is located in the inside of first arch foot box 210, one end of first temporary steel support 230 is overlapped on the present situation road surface 110, and the other end is connected with first arch wall box 220, one end of the second support component 30 is connected with the outer wall of first arch wall box 220, and the other end is connected with the overbreak side lining 120 of existing tunnel 10.

[0034] Specifically, the deviation rectification range can be determined by measurement in advance, the first support component 20 is installed on the inside of the overbreak side lining 120 of the existing tunnel 10 to form temporary support on the inside, and the stability of the structure during construction is ensured. The first support component 20 is connected with the overbreak side lining 120 through the second support component 30 to form a support system in the form of inside-outside cooperation, the original secondary lining on the underbreak side is removed, the surrounding rock is excavated according to the contour line of the newly-built tunnel 40, the tunnel cross section is enlarged, the remaining box structure (not marked in the figure) is installed after the slag is removed, and the first arch foot box 210 and the first arch wall box 220 are combined to form a newly-built arch wall lining structure, and the replacement of the main lining structure is completed. The existing road surface and the inverted arch are removed, and the lower surrounding rock is excavated to the design contour to ensure the inverted arch construction space. The inverted arch secondary lining is constructed according to the design to form a complete tunnel bottom structure. After the new structure reaches the strength, the first temporary steel support 230 and the second support component 30 are removed gradually to realize the smooth transfer of the load from the temporary system to the permanent structure.

[0035] In the scheme, the existing lining on the overbreak side is retained, the underbreak side is expanded and reconstructed to realize the accurate adjustment of the tunnel axis, and the problem of the deviation of the axis of the existing tunnel 10 is safely and quickly solved; the first support component 20 and the second support component 30 are adopted, and the first arch foot box 210 and the first arch wall box 220 adopt a permanent-temporary combined support system (which can be used as a temporary support structure during construction and can also be used as a permanent lining structure of the newly-built tunnel 40), which can effectively improve the stability of the overbreak side lining 120 during construction and has strong usability.

[0036] Secondly, compared with the composite lining form of the tunnel lining of the prior art, the first arch foot box body 210, the first arch wall box body 220 and the remaining box body structure adopt the prefabricated box body structure, which can reduce the site pouring time and improve the construction efficiency. In addition, the underbreak side expansion undoubtedly causes secondary disturbance to the surrounding rock, and the box body structure adopts the rigid support, which can effectively reduce the disturbance to the surrounding rock and improve the construction safety.

[0037] As a preferred embodiment, the inner wall of the first arch foot box body 210 is provided with a first grouting hole (not shown in the figure), and the steel drill concrete is injected into the interior of the first arch foot box body 210 through the first grouting hole to form a first concrete filling layer. After the steel drill concrete is filled, the load bearing capacity of the box body to the surrounding rock pressure and construction load and the structural strength of the box body as a permanent lining structure in the later period can be significantly enhanced, and the concrete grade and the steel fiber and other materials can be adjusted according to the geological conditions of the surrounding rock.

[0038] As a preferred embodiment, the inner wall of the first arch foot box body 210 is provided with a first grouting hole (not shown in the figure), and the steel drill concrete is injected into the interior of the first arch foot box body 210 through the first grouting hole to form a first concrete filling layer. After the steel drill concrete is filled, the load bearing capacity of the box body to the surrounding rock pressure and construction load and the structural strength of the box body as a permanent lining structure in the later period can be significantly enhanced, and the concrete grade and the steel fiber and other materials can be adjusted according to the geological conditions of the surrounding rock.

[0039] Preferably, the first temporary steel support 230 is a corrugated steel plate, the extension direction of the corrugated steel plate is consistent with the extension direction of the new tunnel 40, and the top of the corrugated steel plate is fixedly connected with the first arch wall box body 220. Specifically, the extension direction of the corrugated steel plate is consistent with the extension direction of the new tunnel 40, which can significantly improve the longitudinal bending stiffness and form a continuous longitudinal support system. The corrugated steel plate and the I-beam are both prefabricated components, which can be quickly assembled and shorten the construction period.

[0040] Preferably, the second support assembly 30 comprises a plurality of I-beams which are arranged at intervals along the extension direction of the new tunnel 40, one end of each I-beam is connected with the outer wall of the first arch wall box body 220, and the other end is connected with the overbreak side lining 120 of the existing tunnel 10.

[0041] Specifically, the I-beam as a support assembly can share and transfer the load from the existing tunnel 10. The I-beam is light and easy to construct, which not only can save the construction time, but also can effectively improve the engineering progress.

[0042] As a preferred embodiment, a horizontal support assembly (not shown in the figure) is further included between the first arched wall box 220 and the corrugated steel plate, the horizontal support assembly includes a plurality of horizontal cross braces arranged at intervals along the extension direction of the newly-built tunnel 40, and each horizontal cross brace is detachably connected with the corrugated steel plate and the first arched wall box 220. The horizontal support assembly can effectively resist the pressure from the side of the tunnel and enhance the overall stability of the tunnel structure.

[0043] Further, the inner side of the first arched wall box 220 is provided with an assembling groove 221, the upper edge of the assembling groove 221 is provided with a bevel, the upper end of the corrugated steel plate is provided with a channel steel 231, and the channel steel 231 is connected with the bevel through bolts. The inner side of the first arched wall box 220 is provided with the assembling groove 221, and the upper edge of the groove is provided with the bevel. This design increases the contact area of the connection with the corrugated steel plate, and the bevel provides better engagement effect, so that the connection is more firm. The upper end of the corrugated steel plate is provided with the channel steel 231, and the channel steel 231 is connected with the bevel through bolts. This connection mode not only improves the strength of the connection, but also enhances the overall stability of the structure.

[0044] Further, the upper edge of the outer side of the first arched wall box 220 is provided with a connecting port (not shown in the figure), and the lower end of the I-beam is connected with the connecting port. The upper edge of the outer side of the first arched wall box 220 is provided with the connecting port, and the lower end of the I-beam is connected with the connecting port. This design makes the I-beam and the first arched wall box 220 form a firm connection.

[0045] Further, the bottom end of the corrugated steel plate is provided with an opening (not shown in the figure) serving as an escape passage outlet. As a preferred example, the size of the opening is 200*80cm, and the longitudinal interval is 5m.

[0046] The above is only a preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A temporary support structure for tunnel deviation correction, characterized in that, The first support assembly and the second support assembly are arranged on the inner side of the existing tunnel. The first support assembly comprises a first arch foot box, a first arch wall box and a first temporary steel support. The second support assembly is connected to the outer wall of the first arch wall box at one end and connected to the over-excavated lining of the existing tunnel at the other end.

2. The temporary support structure for tunnel deviation rectification according to claim 1, wherein, The inner wall of the first arch foot box is provided with a first grouting hole.

3. The temporary support structure for tunnel deviation rectification according to claim 2, wherein, The inner wall of the first arch wall box is provided with a second grouting hole.

4. The temporary support structure for tunnel deviation rectification according to claim 1, wherein, The first temporary steel support is a corrugated steel plate.

5. The temporary support structure for tunnel deviation rectification according to claim 1, wherein, The second support assembly comprises a plurality of I-beams arranged along the extension direction of the new tunnel.

6. The temporary support structure for tunnel deviation rectification according to claim 4, wherein, The first arch wall box is provided with a connecting opening on the upper edge of the outer side.

7. The temporary support structure for tunnel deviation rectification according to claim 4, wherein, The lower end of the I-beam is connected to the connecting opening.

8. The temporary support structure for tunnel deviation rectification according to claim 5, wherein, The bottom end of the corrugated steel plate is provided with an opening serving as an escape passage outlet.

9. The temporary support structure for tunnel deviation rectification according to claim 4, wherein, The size of the opening is 200*80cm, and the longitudinal interval is 5m.

10. The temporary support structure for tunnel deviation rectification according to claim 9, wherein, ​

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