GB2618420A

GB2618420A - Tunnel lining maintenance trolley and structure damage repair method

Info

Publication number: GB2618420A
Application number: GB2303093.5A
Authority: GB
Inventors: Hu Qiang; Li Benyun; Du Bin; Gou Deming; Liu Xiaoyong; zhang Anrui; Yang Hong; Cui Xuan
Original assignee: Guizhou Transp Planning Survey And Design Academe Co Ltd
Current assignee: Guizhou Transp Planning Survey And Design Academe Co Ltd
Priority date: 2021-11-12
Filing date: 2022-06-02
Publication date: 2023-11-08
Also published as: GB202303093D0

Abstract

Disclosed in the present invention are a tunnel lining inspection and repair trolley and a method for repairing structural defects. The tunnel lining inspection and repair trolley comprises a trolley frame, wherein cross beams are symmetrically arranged on two sides of the bottom of the trolley frame, the cross beam is provided with a travelling power system on a bottom face thereof, and a sliding rail on a top face thereof; a plurality of foldable arc-shaped steel supporting mechanisms, telescopic arc-shaped inspection and repair supporting mechanisms and arc-shaped rail vehicle inspection and repair mechanisms that are adapted to a tunnel in shape are provided on the trolley frame; and the telescopic arc-shaped inspection and repair supporting mechanisms and the arc-shaped rail vehicle inspection and repair mechanisms are in sliding connection with the sliding rails. According to the present invention, the structure is simple, operation is flexible and convenient, and operability is high. Various components cooperate with each other, and the operation modes of the plurality of components can be flexibly switched, so that structural defects at any position of a tunnel lining can be repaired, greatly improving the operation efficiency of tunnel lining structural defect repairing, shortening the construction period, reducing financial and time investment, and having high practicability.

Description

TUNNEL LINING MAINTENANCE TROLLEY AND STRUCTURE DAMAGE

REPAIR METHOD

TECHNICAL FIELD

[1] The present disclosure relates to a tunnel lining maintenance trolley and a structure damage repair method, and belongs to the technical field of tunnel structure damage maintenance.

BACKGROUND ART

[2] Existing tunnels mostly use composite linings, among which secondary linings are the last lines of defense of tunnel structures, and their quality level is of great significance to safe operation of the tunnels. However, there are some quality damages of insufficient strength, voids and pits, severe aggregate segregation, insufficient structural thickness and the like of the secondary linings caused by the factors such as unqualified concrete materials and improper concrete pouring construction in engineering. Meanwhile, under the influence of tunnel operating environments, concrete structures that have been working for a long time also have the damages such as carbonization, cracking or net-shaped cracking. Once the above situation occurs in the secondary linings, it will inevitably cause potential safety hazards to the reliability of the tunnel structures if it cannot be effectively treated and repaired in time.

[3] As for the damage problem of the secondary linings of the tunnels, the relatively simple and most commonly used repair measure is structural surface reinforcement or structural crack grouting reinforcement. This method has a good repair effect in the case of mild damages, but it cannot effectively deal with relatively severe structure damages. Another more conservative measure is to dismantle and rebuild concrete structures at the damages. This solution can solve the structure damage problems relatively completely, but the dismantling process is higher in construction difficulty and construction risk. At present, there is still a lack of a specialized construction auxiliary trolley in the field of dismantling and replacing construction of secondary lining structures, leading to low efficiency and poor operability of the dismantling and replacing construction of the secondary linings, and there are great construction potential safety hazards. In view of the above considerations, it has become an urgent problem in the engineering sector to study a tunnel lining maintenance trolley and a structure damage repair method.

SUMMARY

1041 In view of this, the present disclosure aims at providing a tunnel lining maintenance trolley and a structure damage repair method, which can overcome the damages in the prior art.

[5] The objective of the present disclosure is achieved by the following technical solution: [6] A tunnel lining maintenance trolley includes a trolley frame, cross beams are symmetrically arranged on two sides of a bottom of the trolley frame, walking power systems are arranged on bottom faces of the cross beams, and sliding rails are arranged on the cross beams; and the trolley frame is provided with a plurality of folding type are-shaped steel supporting mechanisms, retractable are-shaped maintenance supporting mechanisms and arc-shaped rail car maintenance mechanisms, all of which are matched with a tunnel in shape, and the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are connected with the sliding rails in a sliding manner.

[07] The walking power systems, the folding type arc-shaped steel supporting mechanisms, the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are all in telecommunication connection with a remote controller.

1081 The tunnel lining maintenance trolley further includes a plurality of groups of telescopic type expansion foundations symmetrically arranged at a bottom of the trolley frame, bottoms of two sides of the folding type arc-shaped steel supporting mechanisms and middles and two ends of the bottom faces of the cross beams.

[09] The trolley frame includes a plurality of gantries similar to the tunnel in shape, each gantry includes a front gantry and a rear gantry oppositely arranged at a front end and a rear end, a middle gantry is arranged between the front gantry and the rear gantry, and the front gantry, the middle gantry and the rear gantry are connected together by cross bars.

1101 At least two sliding rails are arranged on the cross beams in a longitudinal direction of the tunnel and symmetrically arranged on top faces of the cross beams on the left and right sides of the trolley frame; and the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are arranged on different sliding rails respectively, and radii of the arc-shaped rail car maintenance mechanisms are slightly less than those of the retractable arc-shaped maintenance supporting mechanisms, so that the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are staggered in space so as to move in a mutually staggered manner.

Ill] At least two sets of folding type arc-shaped steel supporting mechanisms are arranged, each folding type arc-shaped steel supporting mechanism includes a plurality of sections of arc-shaped steel supporting beams lapped together to form an arch structure matched with an inner wall of the tunnel, and each section of arc-shaped steel supporting beam is connected with the corresponding gantry by a telescopic adjusting mechanism; and monitoring components are arranged on the arc-shaped steel supporting beams, and the monitoring components are pressure cells, stressometers or any equipment for monitoring force borne by a lining structure.

[12] At least two sets of retractable arc-shaped maintenance supporting mechanisms are arranged; the retractable arc-shaped maintenance supporting mechanisms include bottom arc-shaped steel beams matched with the tunnel in shape, and second remote control rail cars connected with the sliding rails in a sliding manner are arranged at bottom ends of the bottom arc-shaped steel beams; and a plurality of sections of top steel beam bearing plates are arranged on the bottom arc-shaped steel beams, a contour face formed by outer side faces of the plurality of sections of top steel beam bearing plates is of an arch structure matched with the inner wall of the tunnel, and each section of top steel beam bearing plate is connected with the corresponding bottom are-shaped steel beam by a scissor type lifting support.

[13] The arc-shaped rail car maintenance mechanisms include arc-shaped rails matched with the tunnel in shape, and first remote control rail rails connected with the sliding rails in a sliding manner are arranged at bottom ends of the arc-shaped rails; and lifting type platform crown blocks capable of moving along the arc-shaped rails are arranged on the arc-shaped rails, and can carry lining structure detection devices, lining structure dismantling devices, concrete pouring devices or any tunnel lining maintenance device.

[14] A tunnel structure damage repair method includes the following steps: [15] s 1. preliminarily determining a damage range of a tunnel lining structure through naked-eye observation or other means, and controlling, by a remote controller, walking power systems to drive a maintenance trolley in a folded and retracted state to move to a corresponding position automatically; 1161 s2. carrying, by arc-shaped rail car maintenance mechanisms, corresponding lining structure detection devices for secondary detection on the tunnel lining structure to further determine damage sections, damage depth and other parameters of the lining structure and then determine a range of the lining structure required to be dismantled and replaced; [17] s3. switching folding type arc-shaped steel supporting mechanisms into an unfolded supporting state from the folded and retracted state, and making the folding type arc-shaped steel supporting mechanisms fixedly supported at peripheries of front and rear ends of the damaged lining structure; 1181 s4. dividing a damage section of the lining structure within a length range of the maintenance trolley into a plurality of dismantling subsections, section-by-section dismantling within the damage range of the lining structure is implemented in a subsection skipping dismantling manner until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled, and performing concrete pouring construction on the whole section of dismantling region with micro-expansive concrete with a grade one level higher than strength of originally designed concrete; and [19] s5. coating a surface of the dismantled and replaced lining structure with paint, so as to make a surface of newly poured concrete consistent with that of old concrete.

[20] The step of dismantling and replacing the damaged lining structure in step s4 includes the procedures: 1211 s4.1. dividing the damaged lining structure into the plurality of dismantling subsections, each being 1-1.5 m long, alternately supporting each dismantling subsection by the retractable arc-shaped maintenance supporting mechanisms, carrying, by the arc-shaped rail car maintenance mechanisms, corresponding lining structure dismantling devices to perform section skipping dismantling on the dismantling subsections until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled, 1221 as for an armored concrete structure, flushing concrete by a high-pressure water jetting method until rebars on an inner layer are exposed, and as for a plain concrete structure, dismantling a lining structure by the high-pressure water jetting method, static crushing, cutting dismantling or other manners; [23] s 4.2. clearing away those broken concrete, scabbling concrete surfaces, and reinforcing and repairing exposed rebars of a secondary lining; [24] s4.3. tightly jacking assembled formworks on a closed structure dismantling region on an outer surface of the secondary lining by the retractable arc-shaped maintenance supporting mechanisms in a semi-supporting state, and carrying, by lifting type platform crown blocks, concrete pumping equipment to pump concrete to the structure dismantling region for pouring construction; [25] s4.5. removing the formworks after the concrete reaches certain strength, when the strength of the concrete reaches 15 MPa or above, adjusting the retractable arc-shaped maintenance supporting mechanisms into a retracted state from the semi-supporting state, and removing the formworks one by one; and 1261 s4.6. watering for curing in time for not shorter than 14 days after removing the formworks, and when the strength of the concrete reaches 24 MPa or above, moving the maintenance trolley to a next damage section of the lining structure spaced apart from the above damage section for dismantling and replacing of the lining structure. 100151 Compared with the prior art, disclosed are the tunnel lining maintenance trolley and the structure damage repair method. The tunnel lining maintenance trolley includes the trolley frame, the cross beams are symmetrically arranged on the two sides of the bottom of the trolley frame, the walking power systems are arranged on the bottom faces of the cross beams, and the sliding rails are arranged on the cross beams; and the trolley frame is provided with the plurality of folding type arc-shaped steel supporting mechanisms, retractable arc-shaped maintenance supporting mechanisms and arc-shaped rail car maintenance mechanisms, all of which are matched with the tunnel in shape, and the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are connected with the sliding rails in a sliding manner. During work, firstly, the damage range of the tunnel lining structure is preliminarily determined through naked-eye observation or other means, the arc-shaped rail car maintenance mechanisms carry the corresponding fining structure detection devices for secondary detection on the tunnel lining structure to determine the range of the lining structure required to be dismantled and replaced, and the folding type arc-shaped steel supporting mechanisms are fixedly supported on the peripheries of the front and rear ends of the damaged lining structure, so as to conveniently perform dismantling and replacing operation within the range of the lining structure; during dismantling and replacing, the damage section of the lining structure within the length range of the maintenance trolley is divided into the plurality of dismantling subsections, the two arc-shaped rail car maintenance mechanisms alternately support each dismantling subsection, and the arc-shaped rail car maintenance mechanisms carry corresponding lining structure dismantling devices to implement section-by-section dismantling within the damage range of the lining structure in a subsection skipping dismantling manner until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled; and concrete pouring construction is performed on the whole section of dismantling region with the micro-expansive concrete with a grade one level higher than strength of the originally designed concrete, and then repair of the damaged lining structure in the supporting region of the folding type arc-shaped steel supporting mechanisms can be rapidly completed. All the components are effectively matched for use in the repair process, which can deal with most tunnel structure damage problems, wherein the arc-shaped rail car maintenance mechanisms can flexibly carry lining structure detection equipment, lining structure dismantling equipment, concrete pumping equipment and the like, so as to achieve the functions such as omni-bearing detection of the damages of the secondary lining, mechanical dismantling of the lining structure and concrete remote control type pouring, thereby greatly improving the construction operability and construction efficiency of structure maintenance work; and the folding type arc-shaped steel supporting mechanisms and the arc-shaped rail car maintenance mechanisms can achieve the functions such as multiple temporary supporting reinforcement and mobile rapid supporting through change in telescopic forms, so that the construction risk of dismantling and replacing of the lining structure can be effectively reduced.

[27] The present disclosure has the following beneficial effects: [28] (I) the tunnel lining maintenance trolley is simple in structure, flexible and convenient to operate and high in operability, all the components are matched with one another, working forms of the plurality of components can be flexibly switched, structure damages at any position of the tunnel lining can be repaired, and the tunnel lining maintenance trolley is wide in application range and high in practicality; [29] (2) the tunnel lining maintenance trolley has complete functions, the folding type arc-shaped steel supporting mechanisms, the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are matched with one another, the practical functions such as multiple temporary supporting reinforcement, rapid detection of tunnel lining damages, mobile rapid supporting, dismantling of the lining structure and structure formwork erecting pouring can be achieved, the working efficiency of repairing the damages of the tunnel lining can be greatly improved, the construction period can be shortened, financial and time investments can be reduced, the construction efficiency is high, and safety and reliability are high; [30] (3) the sections within the damage range of the lining structure are dismantled and replaced in the manner of subsection skipping dismantling and overall formwork erecting concrete pouring, in combination with multiple temporary supporting reinforcement measures and pertinent structure dismantling and replacing solutions, construction disturbance to adjacent lining sections when the lining structure is dismantled can be effectively reduced, the repaired secondary lining is not prone to shrinkage cracks, and compared with a conventional surface reinforcement method, the curing capacity for the structure damages is higher; and [31] (4) in the repair process, original rebar structures and water-proof and drainage systems cannot be damaged, the dismantled structure is relatively easy to restore, and compared with an existing lining dismantling solution, damage to the original structure is small, and the repair effect of the tunnel structure is better.

[32] Other advantages, objectives, and features of the present disclosure will be illustrated in the specification later to a certain extent, and will be apparent to those skilled in the art based on observational studies hereinbelow to a certain degree, or can render a reveal to those skilled in the art from practice of the present disclosure. The objectives and other advantages of the present disclosure are available by the following specification.

BRIEF DESCRIPTION OF THE DRAWINGS

[33] To make the objectives, the technical solutions and the advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to drawings, wherein [34] FIG. I is a structural schematic diagram of the present disclosure.

[35] FIG. 2 is a structural schematic diagram of a trolley frame 1.

[36] FIG. 3 is a structural schematic diagram of a telescopic type expansion foundation 8.

[37] FIG. 4 is a structural schematic diagram of a walking power system 3.

[38] FIG. 5 is a connection structural schematic diagram of a folding type arc-shaped steel supporting mechanism 5 and a trolley frame 1.

[39] FIG. 6 is a connection structural schematic diagram of a front gantry 1011 or a rear gantry 1013 and the folding type arc-shaped steel supporting mechanism 5 in FIG. 5.

[40] FIG. 7 is a connection structural schematic diagram of a retractable arc-shaped maintenance supporting mechanism 6 and an arc-shaped rail car maintenance mechanism 7 and a trolley frame 1.

[411 FIG. 8 is a structural schematic diagram of a retractable arc-shaped maintenance supporting mechanism 6.

[42] FIG. 9 is a connection structural schematic diagram of a top steel beam bearing plate 603 and a bottom arc-shaped steel beam 601 in FIG. 8.

[43] FIG. 10 is a structural schematic diagram of an arc-shaped rail car maintenance mechanism 7.

[44] FIG. 11 is a structural schematic diagram of a lifting type platform crown block 703 in FIG. 10.

[45] FIG. 12 is a schematic diagram of a folded and retracted slate of a folding type arc-shaped steel supporting mechanism 5 during work.

[46] FIG. 13 is a schematic diagram of an unfolded supporting state of a folding type arc-shaped steel supporting mechanism 5 during work.

[47] FIG. 14 is a schematic diagram of a folded and retracted state of a retractable arc-shaped maintenance supporting mechanism 6 during work.

[48] FIG. 15 is a schematic diagram of a completely unfolded supporting state of a retractable arc-shaped maintenance supporting mechanism 6 during work.

[49] FIG. 16 is a schematic diagram of a semi-supporting state of a retractable arc-shaped maintenance supporting mechanism 6 during work.

[50] FIG. 17 is a first flow diagram showing dismantling a lining structure according to a plurality of dismantling and replacing subsections.

[51] FIG. 18 is a second flow diagram showing dismantling a lining structure according to a plurality of dismantling and replacing subsections.

[52] FIG. 19 is a third flow diagram showing dismantling a lining structure according to a plurality of dismantling and replacing subsections.

[53] FIG. 20 is a schematic diagram showing formwork sealing pouring on a dismantling region of a lining structure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[54] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be understood that the preferred embodiments are not intended to limit the protection scope of the present disclosure, but arc merely descriptive of the present disclosure.

[55] As shown in FIGS. 1-11, a tunnel lining maintenance trolley includes a trolley frame 1, cross beams 2 are symmetrically arranged on two sides of a bottom of the trolley frame 1, walking power systems 3 are arranged on bottom faces of the cross beams 2, and sliding rails 4 are arranged on the cross beams; and the trolley frame 1 is provided with a plurality of folding type arc-shaped steel supporting mechanisms 5, retractable arc-shaped maintenance supporting mechanisms 6 and arc-shaped rail car maintenance mechanisms 7, all of which are matched with a tunnel in shape, and the retractable arc-shaped maintenance supporting mechanisms 6 and the arc-shaped rail car maintenance mechanisms 7 are connected with the sliding rails 4 in a sliding manner.

[56] The walking power systems 3, the folding type arc-shaped steel supporting mechanisms 5, the retractable arc-shaped maintenance supporting mechanisms 6 and the arc-shaped rail car maintenance mechanisms 7 are all in telecommunication connection with a remote controller.

[57] The tunnel lining maintenance trolley further includes a plurality of groups of telescopic type expansion foundations 8 symmetrically arranged at a bottom of the trolley frame 1, bottoms of two sides of the folding type arc-shaped steel supporting mechanisms 5 and middles and two ends of the bottom faces of the cross beams 2 to serve as supporting foundations used when the maintenance trolley works.

[58] The telescopic type expansion foundations 8 include expansion supporting plates 801 fixedly connected with the trolley frame 1 and the bottom faces of the cross beams 2 through hydraulic oil cylinders 802, hydraulic control systems of the hydraulic oil cylinders 802 can be controlled by the remote controller, so as to make the hydraulic oil cylinders 802 do telescopic actions and then make the expansion supporting plates 801 support the ground or retract.

[59] The trolley frame 1 includes a plurality of gantries 101 similar to the tunnel in shape, and the gantries 101 are connected together by a plurality of uniformly-distributed cross bars 102. The gantries 101 are assembled into a structure similar to the tunnel in shape by a plurality of connecting bars in a rigid or welded connection manner.

1601 Preferably, each gantry 101 includes a front gantry 1011 and a rear gantry 1013 oppositely arranged at a front end and a rear end, a middle gantry 1012 is arranged between the front gantry 1011 and the rear gantry 1013, and the front gantry 1011, the middle gantry 1012 and the rear gantry 1013 are connected together by the cross bars 102.

[61] A plurality of working platforms 103 at different heights are symmetrically arranged on the two sides of the trolley frame I. [62] The two or more groups of walking power systems 3 are uniformly distributed on the bottom faces of the cross beams 2 for supporting and moving the maintenance trolley. Specifically, the three groups of walking power systems 3 are symmetrically arranged on the middles and two ends of the bottom faces of the cross beams 2 on the left and right sides of the trolley frame 1.

[63] The walking power systems 3 include power bins 301 capable of being remotely controlled, the power bins 301 are connected with roller mechanisms 303 by connecting drive bars 302, and the power bins 301 can be controlled by the remote controller, so as to make the walking power systems 3 walk.

[64] Al least two sets of folding type arc-shaped steel supporting mechanisms 5 are arranged and respectively connected with the front gantries 1011 and the rear gantries 1013 by telescopic adjusting mechanisms 502.

[65] The telescopic adjusting mechanisms 502 may be electric jacks capable of being remotely controlled.

1661 Each folding type arc-shaped steel supporting mechanism 5 includes a plurality of sections of arc-shaped steel supporting beams 501 lapped together to form an arch structure matched with an inner wall of the tunnel, and each section of arc-shaped steel supporting beam 501 is connected with the corresponding gantry 1011 or rear gantry 1013 by the corresponding telescopic adjusting mechanism 502.

[67] Monitoring components 503 are arranged on the are-shaped steel supporting beams 501, and the monitoring components 503 are pressure cells, stressometers or any equipment for monitoring force borne by a lining structure.

1681 Each arc-shaped steel supporting beam 501 is arranged into three sections, and includes a top arc-shaped steel supporting beam 5011, side arc-shaped steel supporting beams 5012 are symmetrically arranged on two sides of the top arc-shaped steel supporting beam 5011, matched lap groove structures 5013 are arranged at two ends of the top arc-shaped steel supporting beam 5011 and upper ends of the side arc-shaped steel supporting beams 5012, and the top are-shaped steel supporting beam 5011 and the side are-shaped steel supporting beams 5012 on the two sides arc combined by the lap groove structures 5013 into the closed arc-shaped steel supporting beam, which may serve as an annular supporting structure of the tunnel lining; the top arc-shaped steel supporting beam 5011 is arranged on tops of the front gantries 1011 or the rear gantries 1013 and mechanically connected with the front gantries 1011 or the rear gantries 1013 by four vertical jacks; the side arc-shaped steel supporting beams 5012 are mechanically connected with the front gantries 1011 or the rear gantries 1013 by two horizontal jacks, the arc-shaped steel supporting beam 501 can be switched between an unfolded supporting state and a folded and retracted state by the corresponding telescopic adjusting mechanism 502, when the arc-shaped steel supporting beam 501 is in the unfolded supporting slate, it serves as a temporary annular reinforcement support for front and rear ends of a dismantling and replacing section of the tunnel lining structure, and meanwhile, the monitoring components 503 may be pressure cells, stressorneters and the like according to specific requirements for monitoring force borne by the lining structure in real time; and when the arc-shaped steel supporting beam 501 is the folded and retracted state, the maintenance trolley can longitudinally move in the tunnel. When the are-shaped steel supporting beam 501 is in the unfolded supporting state, the telescopic type expansion foundation at the bottom thereof is in a state of extending down to the ground so as to achieve auxiliary supporting; and when the arc-shaped steel supporting beam 501 is in the folded and retracted state, the telescopic type expansion foundation at the bottom thereof is in a retracted state so as to facilitate moving.

1691 At least two sliding rails 4 are arranged on the cross beams 2 in a longitudinal direction of the tunnel, symmetrically arranged on top faces of the cross beams 2 on the left and right sides of the trolley frame 1 and arranged on inner and outer sides; and the retractable arc-shaped maintenance supporting mechanisms 6 are located on the sliding rail on the outer side, the arc-shaped rail car maintenance mechanisms 7 are located on the sliding rail on the inner side, and the retractable arc-shaped maintenance supporting mechanisms 6 and the arc-shaped rail car maintenance mechanisms 7 slide along the corresponding sliding rails in a staggered manner.

[70] At least two sets of retractable arc-shaped maintenance supporting mechanisms 6 are arranged.

[71] The retractable arc-shaped maintenance supporting mechanisms 6 include bottom arc-shaped steel beams 601 matched with the tunnel in shape, and second remote control rail cars 602 connected with the sliding rails 4 in a sliding manner are arranged at bottom ends of the bottom arc-shaped steel beams 601; and a plurality of sections of top steel beam bearing plates 603 are arranged on the bottom arc-shaped steel beams 601, and gaps facilitating telescopic motion are reserved between the top steel beam bearing plates 603 on adjacent sections; a contour face formed by outer side faces of the plurality of sections of top steel beam bearing plates 603 is of an arch structure matched with the inner wall of the tunnel, and each section of top steel beam bearing plate 603 is connected with the corresponding bottom arc-shaped steel beam 601 by a scissor type lifting support 604 capable of being remotely controlled; and the remote controller can control the second remote control rail cars 602 to make the retractable arc-shaped maintenance supporting mechanisms 6 slide along the sliding rails 4, and meanwhile control the scissor type lifting supports 604 to mechanically deform to be telescopic radially, and then the top steel beam bearing plates 603 can be switched among a completely unfolded supporting state, a semi-supporting state and a folded and retracted state. When the top steel beam bearing plates 603 are in the retracted state, the maintenance trolley can longitudinally move in the tunnel; when in the semi-supporting state, the top steel beam bearing plates 603 and assembled formworks 9 can be matched to achieve construction operation of formwork erecting concrete pouring; and when in the completely unfolded supporting state, the top steel beam bearing plates 603 can be tightly attached to the tunnel lining structure to be used as temporary annular supports.

[72] Radii of the arc-shaped rail car maintenance mechanisms 7 are slightly less than those of the retractable arc-shaped maintenance supporting mechanisms 6, so that the retractable arc-shaped maintenance supporting mechanisms and the arc-shaped rail car maintenance mechanisms are staggered in space so as to move in a mutually staggered manner.

[73] The arc-shaped rail car maintenance mechanisms 7 include arc-shaped rails 701 matched with the tunnel in shape, and first remote control rail rails 702 connected with the sliding rails 4 in a sliding manner arc arranged at bottom ends of the arc-shaped rails 701; and lifting type platform crown blocks 703 capable of moving along the arc-shaped rails 701 are arranged on the arc-shaped rails 701, and can carry lining structure detection devices, lining structure dismantling devices, concrete pouring devices or any tunnel lining maintenance device. The first remote control rail cars 702 can be controlled by the remote controller to move along the sliding rails 4 for tunnel maintenance work.

[74] The two arc-shaped rails 701 are arranged, and the lifting type platform crown blocks 703 are arranged on the two arc-shaped rails, so as to ensure better motion stability, thereby improving maintenance precision.

[75] The lifting type platform crown blocks 703 include wheel carriers 7031, lifting type equipment carrying platforms 7032 are arranged in middles of the wheel carriers 7031, and power rollers 7034 connected with drive motors 7033 capable of being remotely controlled and driven rollers 7035 matched with the power rollers 7034 for use are symmetrically arranged on two sides; tooth-shaped structures 7011 are arranged on the arc-shaped rails 701, and the driving rollers 7034 and the driven rollers 7035 are oppositely located on upper and lower portions of the arc-shaped rails 701 and matched with the arc-shaped rails 701 for installation by the tooth-shaped structures 7011. the remote controller can control the drive motors 7033 to supply power to the power rollers 7034, so that the lifting type platform crown blocks 703 slide along the arc-shaped rails 701; the lifting type equipment carrying platforms 7032 are connected with the wheel carriers 7031 in a sliding manner by electric jack mechanisms 7036 capable of being remotely controlled; and lifting motion of the lifting type equipment carrying platforms 7032 can be achieved through telescopic motion of the electric jack mechanisms 7036.

[76] As shown in FIGS. 12-20, a tunnel structure damage repair method based on the above maintenance trolley includes the following steps: [77] s I. a damage range of a tunnel lining structure is preliminarily determined through naked-eye observation or other means, and a remote controller controls walking power systems 3 to drive the maintenance trolley in a folded and retracted state to move to a corresponding position automatically; 1781 s2. arc-shaped rail car maintenance mechanisms 7 carry corresponding lining structure detection devices for secondary detection on the tunnel lining structure to further determine damage sections, damage depth and other parameters of the lining structure and then determine a range of the lining structure required to be dismantled and replaced; [79] s3. folding type arc-shaped steel supporting mechanisms 5 are switched into an unfolded supporting state from the folded and retracted state to be fixedly supported at peripheries of front and rear ends of the damaged lining structure; [80] s4. a damage section of the lining structure within a length range of the maintenance trolley is divided into a plurality of dismantling subsections, section-by-section dismantling within the damage range of the lining structure is implemented in a subsection skipping dismantling manner until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled, and concrete pouring construction is performed on the whole section of dismantled region with micro-expansive concrete with a grade one level higher than strength of originally designed concrete; and [81] s5. a surface of the dismantled and replaced lining structure is coated with paint, so as to make a surface of newly poured concrete consistent with that of old concrete. [0061] Monitoring measurement work of relevant sections is enhanced in the whole dismantling and replacing process of the lining structure, if abnormal changes are found in monitoring data, it. should immediately stop construction, find out causes and perform corresponding treatment. construction, and dismantling and replacing construction of the fining structure can be restored on the premise of ensuring overall structure safety.

[82] In step s2, the structure detection devices are carried on the lifting type platform crown blocks 703 of the arc-shaped rail car maintenance mechanisms 7 and controlled by the first remote control rail cars 702 to move along the sliding rails 4, the lifting type platform crown blocks 703 can annularly slide along the arc-shaped rails 701, and meanwhile, the lifting type platform crown blocks 703 can make the structure detection devices ascend or descend to reach any position within the contour range of the lining structure for omni-bearing detection.

[83] The structure detection devices are georadar antennas, and the damaged lining structure at the corresponding position is secondarily detected by the georadar antennas, so as to further determine the damage range of the lining structure and then determine the range of the lining structure required to be dismantled and replaced.

[84] In step s3, the maintenance trolley moves to the position of the lining section required to be dismantled and replaced, the telescopic type expansion foundations 8 extend down to the ground, the folding type arc-shaped steel supporting mechanisms 5 are switched into the unfolded supporting state, and the annular reinforcement supports tightly jack the two ends of the secondary lining required to be dismantled and replaced, so as to effectively prevent adverse effects of dismantling and replacing construction on adjacent structure sections. At this moment, the whole maintenance trolley is fixed in place, which not only provides necessary functions of the temporary annular reinforcement supports, but also provides a construction operation platform required by dismantling and replacing construction of the lining structure, and a construction passageway allowing relevant vehicles to pass is further reserved in a lower portion of the maintenance trolley.

[85] The monitoring components 503 can monitor the force borne by the tunnel lining structure, so as to provide necessary monitoring data for construction.

[86] In step s4, the two retractable arc-shaped maintenance supporting mechanisms 6 slide to front and rear sides of a to-be-dismantled subsection, and adjusted into the completely unfolded supporting state from the folded and retracted state to serve as the temporary annular reinforcement supports of the to-be-dismantled subsection, and then the arc-shaped rail car maintenance mechanisms 7 slide to the to-be-dismantled subsection to perform structure dismantling work of the subsection by the structure dismantling equipment carried thereon; 1871 when one dismantling and replacing subsection is dismantled and after structural deformation is stable, the retractable arc-shaped maintenance supporting mechanisms 6 are adjusted into the retracted state from the completely unfolded supporting state and longitudinally move to a next to-be-dismantled subsection spaced from the above to-bedismantled subsection along with the arc-shaped rail car maintenance mechanisms 7; and the operation is repeated until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled.

1881 Specifically, the step of dismantling and replacing the damaged lining structure includes the procedures: [89] s4.1. the damage section of the lining structure within the length range of the maintenance trolley is divided into the plurality of dismantling subsections, each being 1-1.5 in long, each dismantling subsection is alternately supported by the retractable arc-shaped maintenance supporting mechanisms 6, and the arc-shaped rail car maintenance mechanisms 7 carry corresponding lining structure dismantling devices to perform section skipping dismantling on the dismantling subsections until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled; [90] different kinds of dismantling equipment are selected to be carried for dismantling the lining structure of the to-be-dismantled subsection according to types of tunnel lining structures: [91] when the tunnel lining is of a reinforced concrete structure, the lifting type platform crown blocks 703 carry high-pressure water jetting equipment to flush and dismantle the damaged lining structure by a high-pressure water jetting method, and the concrete is flushed layer by layer until rebars on an inner layer are exposed; in the flushing and dismantling process, the first remote control rail cars 702 control the equipment to move along the sliding rails 4 to adjust longitudinal flushing positions, the lifting type platform crown blocks 703 can annularly slide along the arc-shaped rails 701 to adjust annular flushing positions, and meanwhile, the lifting type platform crown blocks 703 can ascend and descend to adjust a radial interval between a sprayer of the high-pressure waterjetting equipment and the lining structure; and [92] when the tunnel lining is of a plain concrete structure, the lining structure is dismantled by the high-pressure water jetting method, static crushing, cutting dismantling or other manners, and when the lining structure is dismantled by the high-pressure water jetting method, the lifting type platform crown blocks 703 carry the high-pressure water jetting equipment for dismantling the lining structure; when the lining structure is dismantled by the static crushing, the lifting type platform crown blocks 703 carry static hydraulic crushing machines for dismantling the lining structure; and when the lining structure is dismantled by cutting dismantling, the lifting type platform crown blocks 703 carry concrete cutting machines for dismantling the lining structure.

[93] s 4.2, loose broken concrete is cleared away, and concrete surfaces are scabbled; exposed rebars of the secondary lining are repaired, specifically including derusting, binding fixing, welding of reinforcing rebars or other rebar reinforcing treatment; and [94] connecting reinforcing ribs may be implanted in a rebar implanting manner in necessary; 195] s4.3. in order to perform formwork sealing pouring on the dismantling and replacing subsection, [96] a structure dismantling region is sealed by the assembled formworks 9, and the lifting type platform crown blocks 703 carry concrete pumping equipment to pump concrete to the structure dismantling region for pouring construction; [97] the two arc-shaped rail car maintenance mechanisms 7 are adjusted into the semi-supporting state from the completely unfolded supporting state, and the assembled formworks 9 are tightly jacked on the outer surface of the secondary lining, so as to ensure that they do not shift or deform in the concrete pouring process; [98] micro-expansive concrete should be adopted, its strength is one level higher than that of an original concrete structure, and vibrating equipment should be adopted during pumping to ensure that the concrete is densely poured, [99] s4.5. the formworks are removed after the concrete reaches certain strength, [100] preferably, when the strength of the concrete reaches 15 MPa or above, the assembled formworks 9 are removed; at this time, the two arc-shaped rail car maintenance mechanisms 7 are adjusted into the folded and retracted state from the semi-supporting state to remove the formworks one by one; and [101] watering for curing is performed in time for not shorter than 14 days after the formworks are removed, and when the strength of the concrete reaches 24 M Pa or above, the maintenance trolley can be moved to a next damage section of the lining structure spaced apart from the above damage section for dismantling and replacing of the lining structure.

[102] In step s5, the surface of the concrete may be coated with the paint, so that the surfaces of the newly poured concrete and the old concrete are consistent, thereby achieving the effect of overall attractiveness. The paint is prepared by mixing white cement, grey cement and latex into a color similar to that of the surrounding concrete.

[103] The above descriptions are only the preferred embodiments of the present disclosure rather than limitations to the present disclosure in any form. Any simple amendments, equivalent changes or modifications made to the above embodiments according to the technical essence of the present disclosure should fall in the scope of the technical solution of the disclosure, without departing from the content of the technical solution of the present disclosure.

Claims

WHAT IS CLAIMED IS: I. A tunnel lining maintenance trolley, characterized by comprising a trolley frame (1), wherein cross beams (2) are symmetrically arranged on two sides of a bottom of the trolley frame (1), walking power systems (3) are arranged on bottom faces of the cross beams (2), and sliding rails (4) are arranged on the cross beams; and the trolley frame (1) is provided with a plurality of folding type arc-shaped steel supporting mechanisms (5), retractable arc-shaped maintenance supporting mechanisms (6) and arc-shaped rail car maintenance mechanisms (7), all of which are matched with a tunnel in shape, and the retractable arc-shaped maintenance supporting mechanisms (6) and the arc-shaped rail car maintenance mechanisms (7) are connected with the sliding rails in a sliding manner.
2. The tunnel lining maintenance trolley according to claim 1, characterized in that the walking power systems (3), the folding type arc-shaped steel supporting mechanisms (5), the retractable arc-shaped maintenance supporting mechanisms (6) and the arc-shaped rail car maintenance mechanisms (7) are all in telecommunication connection with a remote controller.
3. The tunnel lining maintenance trolley according to claim 1 or 2, characterized by further comprising a plurality of groups of telescopic type expansion foundations (8) symmetrically arranged at a bottom of the trolley frame (1), bottoms of two sides of the folding type arc-shaped steel supporting mechanisms (5) and middles and two ends of the bottom faces of the cross beams (2).
4. The tunnel lining maintenance trolley according to claim 3, characterized in that the trolley frame (1) comprises a plurality of gantries (101) similar to the tunnel in shape, each gantry (101) comprises a front gantry (1011) and a rear gantry (1013) oppositely arranged at a front end and a rear end, a middle gantry (1012) is arranged between the front gantry (1011) and the rear gantry (1013), and the front gantry (1011), the middle gantry (1012) and the rear gantry (1013) are connected together by cross bars (102).
5. The tunnel lining maintenance trolley according to claim 3, characterized in that at least two sliding rails (4) are arranged on the cross beams (2) in a longitudinal direction of the tunnel and symmetrically arranged on top faces of the cross beams (2) on the left and right sides of the trolley frame (1); and the retractable arc-shaped maintenance supporting mechanisms (6) and the arc-shaped rail car maintenance mechanisms (7) are arranged on different sliding rails respectively, and radii of the arc-shaped rail car maintenance mechanisms (7) are slightly less than those of the retractable arc-shaped maintenance supporting mechanisms (6), so that the retractable arc-shaped maintenance supporting mechanisms (6) and the arc-shaped rail car maintenance mechanisms (7) are staggered in space so as to move in a mutually staggered manner.
6. The tunnel lining maintenance trolley according to claim 4, characterized in that at least two sets of folding type arc-shaped steel supporting mechanisms (5) are arranged, each folding type arc-shaped steel supporting mechanism (5) comprises a plurality of sections of arc-shaped steel supporting beams (501) lapped together to form an arch structure matched with an inner wall of the tunnel, and each section of arc-shaped steel supporting beam (501) is connected with the corresponding gantry (101) by a telescopic adjusting mechanism (502); and monitoring components (503) are arranged on the arc-shaped steel supporting beams (501), and the monitoring components (503) are pressure cells, stressometers or any equipment for monitoring force borne by a lining structure.
7. The tunnel lining maintenance trolley according to claim 5, characterized in that at least two sets of retractable arc-shaped maintenance supporting mechanisms (6) are arranged, the retractable arc-shaped maintenance supporting mechanisms (6) comprise bottom arc-shaped steel beams (601) matched with the tunnel in shape, and second remote control rail cars (602) connected with the sliding rails (4) in a sliding manner are arranged at bottom ends of the bottom arc-shaped steel beams (601); and a plurality of sections of top steel beam bearing plates (603) are arranged on the bottom arc-shaped steel beams (601), a contour face formed by outer side faces of the plurality of sections of top steel beam bearing plates (603) is of an arch structure matched with the inner wall of the tunnel, and each section of top steel beam bearing plate (603) is connected with the corresponding bottom arc-shaped steel beam (601) by a scissor type lifting support (604).
8. The tunnel lining maintenance trolley according to claim 5, characterized in that the arc-shaped rail car maintenance mechanisms (7) comprise arc-shaped rails (701) matched with the tunnel in shape, and first remote control rail rails (702) connected with the sliding rails (4) in a sliding manner are arranged at bottom ends of the arc-shaped rails (701); and lifting type platform crown blocks (703) capable of moving along the arc-shaped rails (701) are arranged on the arc-shaped rails (701), and can carry lining structure detection devices, lining structure dismantling devices, concrete pouring devices or any tunnel lining maintenance device.
9. A tunnel structure damage repair method, characterized by comprising the following steps: sl. preliminarily determining a damage range of a tunnel lining structure through naked-eye observation or other means, and controlling, by a remote controller, walking power systems (3) to drive a maintenance trolley in a folded and retracted state to move to a corresponding position automatically; s2. carrying, by arc-shaped rail car maintenance mechanisms (7), corresponding lining structure detection devices for secondary detection on the tunnel lining structure to further determine damage sections, damage depth and other parameters of the lining structure and then determine a range of the lining structure required to be dismantled and replaced; s3. switching folding type arc-shaped steel supporting mechanisms (5) into an unfolded supporting state from the folded and retracted state, and making the folding type arc-shaped steel supporting mechanisms fixedly supported at peripheries of front and rear ends of the damaged lining structure; s4. dividing a damage section of the fining structure within a length range of the maintenance trolley into a plurality of dismantling subsections, implementing section-bysection dismantling within the damage range of the lining structure in a subsection skipping dismantling manner until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled, and performing concrete pouring construction on the whole section of dismantling region with micro-expansive concrete with a grade one level higher than a strength of originally designed concrete; and s5. coating a surface of the dismantled and replaced lining structure with paint, so as to make a surface of newly poured concrete is consistent with that of old concrete.
10. The tunnel structure damage repair method according to claim 9, characterized in that the step of dismantling and replacing the damaged lining structure in step s4 comprises the procedures: s4.1. dividing the damaged lining structure into the plurality of dismantling subsections, each being 1-1.5 in long, alternately supporting each dismantling subsection by the retractable arc-shaped maintenance supporting mechanisms (6), carrying, by the arc-shaped rail car maintenance mechanisms (7), corresponding lining structure dismantling devices to perform section skipping dismantling on the dismantling subsections until all the lining structures within the fixed supporting range of the whole maintenance trolley are dismantled, as for an armored concrete structure, flushing concrete by a high-pressure water jetting method until rebars on an inner layer are exposed, and as for a plain concrete structure, dismantling a lining structure by the high-pressure water j etting method, static crushing, cutting dismantling or other manners; s 4.2. clearing away loose broken concrete. scabbling concrete surfaces, and reinforcing and repairing exposed rebars of a secondary lining; s4.3. tightly jacking assembled formworks (9) on a closed structure dismantling region on an outer surface of the secondary lining by the retractable arc-shaped maintenance supporting mechanisms (6) in a semi-supporting state, and carrying, by lifting type platform crown blocks (703), concrete pumping equipment to pump concrete to the structure dismantling region for pouring construction; s4.4. removing the formworks after the concrete reaches certain strength, when the strength of the concrete reaches 15 M Pa or above, adjusting the retractable arc-shaped maintenance supporting mechanisms (6) into a retracted state from the semi-supporting state, and removing the formworks one by one; and s4.5. watering for curing in time for not shorter than 14 days after removing the formworks, and when the strength of the concrete reaches 24 MPa or above, moving the maintenance trolley to a next damage section of the lining structure spaced apart from the above damage section for dismantling and replacing of the lining structure.