A temporary arch protection structure in tunnel initial support arch replacement construction

Abstract

The utility model discloses a tunnel initial stage support arch replacement construction in -between temporary arch protection structure, include: the lower support seat, install multiple sets of hydraulic lifting mechanism A on it, the upper support seat supports on hydraulic lifting mechanism A, and through multiple sets of hydraulic lifting mechanism A height lifting adjustment, install multiple sets of hydraulic lifting mechanism B on the upper support seat, and the upper end of each set of hydraulic lifting mechanism B is fixedly installed with the arch protection frame support groove with inclined recess cavity, is used for supporting the arch protection frame, the arch protection frame is erected on the arch protection frame support groove, the height position of the arch protection frame can be accurately adjusted to adapt to the design requirement of different tunnel section and the change of construction stage through multiple sets of hydraulic lifting mechanism A on the lower support seat height lifting adjustment of the upper support seat, cooperates hydraulic lifting mechanism B on the upper support seat, greatly improves the applicability and versatility of temporary arch protection structure under different working conditions, reduces the construction difficulty and error due to height mismatch, improves construction efficiency and quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tunnel construction, specifically to a temporary arch protection structure in tunnel primary support arch replacement construction. BACKGROUND

[0002] In the process of tunnel primary support arch replacement construction, the traditional arch protection structure and construction method have many deficiencies. The previous arch protection support structure often lacks flexible height adjustment capability, which is difficult to adapt to different tunnel sections and construction requirements, resulting in low construction efficiency and difficulty in ensuring construction precision. At the same time, the support method of the arch protection frame is relatively single, which cannot fully meet the stable support requirements of the arch protection frame with curvature, and problems such as uneven stress and structural deformation are likely to occur during construction, thereby affecting the quality and safety of the tunnel primary support. In addition, the traditional arch protection structure is difficult to balance in terms of mobility and stability, either inconvenient to move or not stable enough when fixed, increasing the complexity and risk of construction. Moreover, there is a lack of effective monitoring means for the stress of the arch protection frame during construction, making it difficult to monitor the stress state of the arch protection frame in real time, and unable to adjust and handle abnormal situations in time, which is not conducive to the smooth progress of the entire tunnel primary support arch replacement construction and reliable control of engineering quality. SUMMARY

[0003] Therefore, in order to solve the above-mentioned deficiencies, the utility model provides a temporary arch protection structure in tunnel primary support arch replacement construction. The height of the upper support seat is adjusted by the multiple sets of hydraulic lifting mechanisms A on the lower support seat, and cooperates with the hydraulic lifting mechanisms B on the upper support seat, which can accurately adjust the height position of the arch protection frame to adapt to the design requirements of different tunnel sections and the changes in the construction stage, greatly improving the applicability and universality of the temporary arch protection structure under different working conditions, reducing the construction difficulties and errors caused by height mismatch, and improving the construction efficiency and quality.

[0004] The utility model is realized in this way, and a temporary arch protection structure in tunnel primary support arch replacement construction is constructed, characterized by comprising:

[0005] A lower support seat (1) is provided with multiple sets of hydraulic lifting mechanisms A (4);

[0006] An upper support seat (2) is supported on the hydraulic lifting mechanisms A (4) and adjusted in height by the multiple sets of hydraulic lifting mechanisms A (4), and the upper support seat (2) is provided with multiple sets of hydraulic lifting mechanisms B (5), and the upper end of each set of hydraulic lifting mechanisms B (5) is fixedly provided with an arch protection frame groove (7) with a slanting cavity (6) for supporting the arch protection frame (3);

[0007] An arch protection frame (3) is erected on the arch protection frame groove (7).

[0008] The utility model discloses a temporary arch protection structure in the tunnel initial support arch replacement construction, its characterized in being: the oblique cavity (6) is used for conveniently supporting the arch protection frame (3) with the camber and supporting stress.

[0009] The utility model discloses a temporary arch protection structure in the tunnel initial support arch replacement construction, its characterized in being: the side panel seat (8) is fixed with on the lower support base (1), the side face jack (9) of supporting the lower end of arch protection frame (3) is installed on the outside of side panel seat (8), and the end of side face jack (9) is installed load detection device A (10), and load detection device A (10) can detect the jacking degree that the lower end of arch protection frame (3) receives.

[0010] The utility model discloses a temporary arch protection structure in the tunnel initial support arch replacement construction, its characterized in being: the oblique seat (11) is fixed with on the both sides of upper support base (2), the oblique jack (12) of supporting the middle part of arch protection frame (3) is installed on the oblique seat (11), and the end of oblique jack (12) is installed load detection device B (13), and load detection device B (13) can detect the jacking degree that the middle part of arch protection frame (3) receives.

[0011] The utility model discloses a temporary arch protection structure in the tunnel initial support arch replacement construction, its characterized in being: the bottom of lower support base (1) is installed with walking roller (14), and hydraulic jacking mechanism (15) is installed respectively on the both side ends of lower support base (1), and the jacking end of hydraulic jacking mechanism (15) is fixed with support seat (16), and the temporary arch protection structure walks through walking roller (14), when walking in place, through hydraulic jacking mechanism (15) jacking up support seat (16), makes it support seat (16) support on the ground, to enhance the stability of the main body structure.

[0012] The utility model discloses a temporary arch protection structure in the tunnel initial support arch replacement construction, its characterized in being: the upper surface of upper support base (2) is welded with a plurality of cylinder seat (17) for positioning hydraulic lifting mechanism B (5).

[0013] The utility model has the advantages of following: (1) height adjustability: the height of the upper support base is adjusted through the multiple sets of hydraulic lifting mechanisms A on the lower support base, and the height position of the arch protection frame is accurately adjusted in cooperation with the hydraulic lifting mechanism B on the upper support base, so that the design requirements of different tunnel sections and the changes in the construction stage are adapted, the applicability and universality of the temporary arch protection structure under different working conditions are greatly improved, the construction difficulties and errors caused by the mismatch of the height are reduced, and the construction efficiency and quality are improved. (2) Good arch protection frame supporting performance: the arch protection frame bracket with the inclined cavity is specially designed for the arch protection frame with the arc, can closely fit the shape of the arch protection frame, provide stable supporting points, and has excellent supporting stress performance. The unique structure effectively disperses the pressure borne by the arch protection frame, avoids local stress concentration, ensures that the arch protection frame always maintains a stable structure state in the initial support process of the tunnel, and thus guarantees the safety and stability of the tunnel construction. (3) Precise stress monitoring: the load detection device A installed at the end of the side jack of the lower support base and the load detection device B at the end of the inclined jack of the upper support base can monitor the jacking force of the lower end and the middle part of the arch protection frame in real time and accurately. Construction personnel can understand the stress condition of the arch protection frame in time according to the detection data, so that adjustment measures can be taken quickly when abnormal stress is found, safety accidents such as deformation and collapse of the arch protection frame caused by uneven stress or overload are effectively prevented, and reliable safety protection is provided for the tunnel construction. Convenient movement and stable fixation: the walking roller at the bottom of the lower support base enables the whole temporary arch protection structure to have good mobility, can be moved flexibly to the required construction position in the tunnel, and reduces the time and cost of manual carrying and equipment re-establishment. When moved to the position, the hydraulic jacking mechanisms on the two sides can jacking up the support base and make it firmly supported on the ground, the stability of the whole structure in the construction process is significantly enhanced, various external disturbances in the construction process are effectively resisted, the smooth progress of the arch protection operation is ensured, and the stability of the construction efficiency and quality is further improved. (4) Structure optimization and assembly convenience: the cylinder seat on the upper support base is used for positioning the hydraulic lifting mechanism B, not only makes the installation of the hydraulic lifting mechanism B more stable and accurate, but also is favorable for the assembly and disassembly of the whole temporary arch protection structure. The optimized structure design facilitates the maintenance and management of the equipment, reduces the use cost of the construction equipment, improves the operability and reliability of the temporary arch protection structure in the tunnel construction, and is favorable for large-scale application in the initial support arch replacement construction project of the tunnel. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is the schematic diagram of the implementation structure of the application;

[0015] Fig. 2 is the schematic diagram of the arch protection frame bracket structure of the application;

[0016] Fig. 3It is the upper support seat structure schematic diagram of the application.

[0017] Wherein: lower support seat 1, upper support seat 2, arch protection frame 3, hydraulic lifting mechanism A 4, hydraulic lifting mechanism B 5, inclined concave cavity 6, arch protection frame groove 7, side panel seat 8, side jack 9, load detection device A 10, inclined seat 11, inclined jack 12, load detection device B 13, walking roller 14, hydraulic jacking mechanism 15, support seat 16, cylinder seat 17. DETAILED DESCRIPTION

[0018] The application will be described below in conjunction with the accompanying drawings Figs. 1-3 The application will be described below in conjunction with the accompanying drawings

[0019] The application provides a temporary arch protection structure in tunnel initial support arch replacement construction, which comprises a lower support seat 1, an upper support seat 2, an arch protection frame 3, a hydraulic lifting mechanism A 4, a hydraulic lifting mechanism B 5, an inclined concave cavity 6, an arch protection frame groove 7, a side panel seat 8, a side jack 9, a load detection device A 10, an inclined seat 11, an inclined jack 12, a load detection device B 13, a walking roller 14, a hydraulic jacking mechanism 15, a support seat 16 and a cylinder seat 17. Figs. 1-3As shown, it can be implemented in the following manner; the composition comprises a lower support base 1, an upper support base 2, and an arch protection frame 3; a plurality of hydraulic lifting mechanisms A4 are installed on the lower support base 1, and the upper support base 2 is supported on the hydraulic lifting mechanisms A4, so that the lower support base 1 and the upper support base 2 form the main structure of the arch protection support, and the upper support base 2 is adjusted in height by the plurality of hydraulic lifting mechanisms A4; a plurality of hydraulic lifting mechanisms B5 are installed on the upper support base 2, and the upper end of each hydraulic lifting mechanism B5 is fixedly installed with an arch protection frame support groove 7 with a diagonal recess 6, for supporting the arch protection frame 3. In the implementation of the present application, the diagonal recess 6 facilitates the support of the arch protection frame 3 with curvature, and also facilitates the support of the stress. The lower support base 1 is welded with a side panel base 8, and the outer side of the side panel base 8 is installed with a side jack 9 for supporting the lower end of the arch protection frame 3, and the end of the side jack 9 is installed with a load detection device A10, which can detect the jacking force of the lower end of the arch protection frame 3. In the implementation of the present application, the two sides of the upper support base 2 are fixed with diagonal seats 11, and the diagonal seats 11 are installed with diagonal jacks 12 for supporting the middle part of the arch protection frame 3, and the ends of the diagonal jacks 12 are installed with load detection devices B13, which can detect the jacking force of the middle part of the arch protection frame 3. The bottom of the lower support base 1 is installed with traveling rollers 14, and the two side ends of the lower support base 1 are respectively installed with hydraulic lifting mechanisms 15, and the lifting end of the hydraulic lifting mechanisms 15 is fixedly installed with a support base 16, and the main structure travels through the traveling rollers 14, and when it is in place, the support base 16 is lifted by the hydraulic lifting mechanisms 15 to be supported on the ground, so that the main structure is more stable. The upper surface of the upper support base 2 is welded with a plurality of cylindrical seats 17 for positioning the hydraulic lifting mechanisms B5.

[0020] The implementation process of the patent will be described below:

[0021] I. Equipment assembly and debugging phase: Install multiple sets of hydraulic lifting mechanisms A4 at designated positions on the lower support base 1, ensure firm installation, connect the corresponding hydraulic pipelines and control systems, and perform preliminary hydraulic system debugging. Check if the lifting action is smooth and accurate, and if there are any abnormal conditions such as leakage. Place the upper support base 2 on the already debugged hydraulic lifting mechanism A4, so that it is in the initial support state. Weld multiple cylindrical seats 17 on the upper support base 2, then install multiple sets of hydraulic lifting mechanisms B5 in the cylindrical seats 17, debug the hydraulic lifting mechanisms B5 to ensure their normal operation and accurate lifting height control. Fix and install the arch protection frame support groove 7 with a slanted cavity 6 on the upper end of each hydraulic lifting mechanism B5, check the installation angle and stability of the support groove to ensure that it can effectively support the arch protection frame 3. Weld the side panel seat 8 on the lower support base 1, and install the side jack 9 on the outside of the side panel seat 8. Install the load detection device A10 on the end of the side jack 9, debug the load detection device A10 to accurately collect the jacking force data of the lower end of the arch protection frame 3 and transmit it to the monitoring system. Weld the inclined seat 11 on both sides of the upper support base 2, install the inclined jack 12 on the inclined seat 11, and install the load detection device B13 on the end of the inclined jack 12. Debug the load detection device B13 to accurately monitor the jacking force of the middle part of the arch protection frame 3. Install the walking roller 14 at the bottom of the lower support base 1, and install the hydraulic lifting mechanism 15 and its end support seat 16 on both sides. Check the rotation flexibility of the walking roller 14 and the lifting and falling functions of the hydraulic lifting mechanism 15 to ensure that the entire temporary arch protection structure has good mobility and stable support conversion capability.

[0022] II. In-tunnel positioning phase: Use the walking roller 14 at the bottom of the lower support base 1 to push the temporary arch protection structure to the designated position of the initial support arch replacement construction in the tunnel. During the pushing process, the operator needs to closely monitor the surrounding environment to ensure the safe movement of the structure and avoid colliding with the tunnel wall or other construction equipment. When the temporary arch protection structure reaches the predetermined position, start the hydraulic lifting mechanism 15 on both sides of the lower support base 1, so that the support seat 16 gradually lifts to tightly contact the ground and provide sufficient support force to stabilize the entire temporary arch protection structure. At this time, check the connection status of each component and the overall stability again to ensure that there is no displacement or shaking during the subsequent construction process.

[0023] III. Installation and adjustment of the arch protection frame: the arch protection frame 3 is hoisted to the top of the temporary arch protection structure and is erected on the arch protection frame support groove 7. The height and levelness of the arch protection frame 3 are fine-tuned by operating the multiple sets of hydraulic lifting mechanisms B5 on the upper support base 2, so that the arch protection frame 3 can accurately fit the design curvature and position requirements of the initial support of the tunnel. The side jacks 9 on the side panel base 8 of the lower support base 1 and the inclined jacks 12 on the inclined base 11 of the upper support base 2 are started to further support and fine-tune the arch protection frame 3. During the adjustment process, the stress data fed back by the load detection device A10 and the load detection device B13 are closely monitored to ensure that the stress of each part of the arch protection frame 3 is uniform and within the design allowable range. According to the stress data, if necessary, the lifting force of the hydraulic lifting mechanisms B5, the side jacks 9 and the inclined jacks 12 is continuously adjusted until the arch protection frame 3 reaches the best support state.

[0024] IV. Construction stage of replacing the arch of the initial support of the tunnel: under the stable support of the temporary arch protection structure to the arch protection frame 3, the construction operation of replacing the arch of the initial support of the tunnel is carried out. The construction personnel can safely remove the original support structure and install the new support structure under the protection of the arch protection frame 3.

[0025] During the construction process, the stress of the arch protection frame 3 is continuously monitored by the load detection device A10 and the load detection device B13. If abnormal changes in stress data are found, such as sudden increase or decrease in stress of a certain part, the construction operation is immediately stopped, the cause is checked, and the temporary arch protection structure is adjusted accordingly, such as adjusting the lifting force of the hydraulic lifting mechanisms and the jacks, to restore the stable stress state of the arch protection frame 3.

[0026] With the gradual advancement of the construction of replacing the arch of the initial support of the tunnel, the position and height of the temporary arch protection structure are adjusted in a timely manner according to the construction progress and design requirements. By operating the hydraulic lifting mechanisms A4, the hydraulic lifting mechanisms B5 and moving the entire temporary arch protection structure (using the walking rollers 14), it can always provide effective arch protection support for the new construction area.

[0027] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temporary arch protection structure in a tunnel primary support arch replacement construction, characterized by, Include: Lower support seat (1), which is installed on a plurality of groups of hydraulic lifting mechanism A (4); Upper support seat (2) is supported on the hydraulic lifting mechanism A (4), and the height is adjusted by a plurality of groups of hydraulic lifting mechanism A (4), and a plurality of groups of hydraulic lifting mechanism B (5) are installed on the upper support seat (2), and the upper end of each group of hydraulic lifting mechanism B (5) is fixedly installed with a protective arch support groove (7) with a slanting cavity (6), which is used for supporting the protective arch (3); The protective arch (3) is erected on the protective arch support groove (7); The side panel seat (8) is welded and fixed on the lower support seat (1), and the outer side of the side panel seat (8) is installed with a side jack (9) for supporting the lower end of the protective arch (3), and the end of the side jack (9) is installed with a load detection device A (10), which can detect the jacking force of the lower end of the protective arch (3); The two sides of the upper support seat (2) are fixed with a slanting seat (11), and the slanting seat (11) is installed with a slanting jack (12) for supporting the middle part of the protective arch (3), and the end of the slanting jack (12) is installed with a load detection device B (13), which can detect the jacking force of the middle part of the protective arch (3).

2. The temporary arch structure in the tunnel primary support arch replacement construction according to claim 1, characterized in that, The slanting cavity (6) is used for conveniently supporting the protective arch (3) with arc and supporting stress.

3. The temporary arch structure in the tunnel primary support arch replacement construction according to claim 1, characterized in that, The bottom of the lower support seat (1) is installed with a walking roller (14), and a hydraulic lifting mechanism (15) is installed at the two side ends of the lower support seat (1), respectively, and the lifting end of the hydraulic lifting mechanism (15) is fixed with a support seat (16), and the temporary protective arch structure is walked by the walking roller (14), when walking in place, the support seat (16) is lifted by the hydraulic lifting mechanism (15), so that it is supported on the ground, so as to enhance the stability of the protective arch structure.

4. The temporary arch structure in the tunnel primary support arch replacement construction according to claim 1, characterized in that, The upper surface of the upper support seat (2) is welded and fixed with a plurality of cylindrical seats (17) for positioning the hydraulic lifting mechanism B (5).

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