TBM inverted arch pouring device and synchronous inverted arch cast-in-place method thereof

Abstract

The invention provides a TBM inverted arch pouring device and a synchronous inverted arch cast-in-place method thereof, and belongs to the technical field of TBM engineering machinery. Comprising a carrying trolley, an inverted arch formwork, a center groove formwork, a pouring system and a lifting track device. The carrying trolley is in sliding connection with a connecting bridge in the TBM; the inverted arch template comprises a template main body, a pouring window and a first locomotive track; the pouring system comprises a concrete tank, a self-walking trolley and a grouting pipe, the concrete tank is installed on the self-walking trolley, the self-walking trolley moves on the first locomotive track, and the grouting pipe is connected with the concrete tank and the pouring window; the lifting rail device is connected with the center groove formwork, and the center groove formwork is installed below the inverted arch formwork before pouring; after pouring is completed, when secondary lining pouring and filling are conducted, an operator conducts leveling and pouring on the inverted arch horizontal plane through the lifting rail device, and pouring is convenient; and after the inverted arch horizontal plane is poured and initially set, the center groove formwork is demolded through the lifting rail device, and inverted arch pouring is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of TBM engineering machinery and relates to a TBM invert casting device and a synchronous invert casting method thereof. Background Art

[0002] At present, when open TBM is used to construct long and large tunnels, there are generally two methods for laying inverts. One method is to use the invert crane configured with TBM to lay prefabricated inverts. This method requires setting up an invert prefabrication workshop outside the tunnel, which is expensive. In addition, there will be large construction joints when the prefabricated inverts are installed, and secondary caulking is required after installation. The second method uses TBM excavation at the front end and the invert trestle is arranged at the back end to cast-in-place lining of the invert. However, this method is not carried out simultaneously with TBM excavation, and they are two different systems, which increases both equipment costs and labor costs. Summary of the invention

[0003] The present invention aims to provide a method for realizing in-situ casting and lining of an invert by improving a TBM invert casting device and a synchronous invert casting method in a TBM connecting bridge area, so that the entire invert casting process can be carried out synchronously with TBM excavation, thereby saving construction time and engineering costs.

[0004] The present invention provides a TBM invert casting device, comprising a carrying trolley, an invert template, a center trough template, a casting system and a lifting track device;

[0005] The transport trolley is slidably connected to the connecting bridge in the TBM and is used to transport concrete;

[0006] The inverted arch formwork is installed on a carrying trolley, and the inverted arch formwork comprises a formwork body, a casting window arranged on the formwork body, and a first locomotive track, wherein the first locomotive track is extended along the length direction of the formwork body, and the casting window is provided with two groups respectively arranged on both sides of the first locomotive track;

[0007] The pouring system is installed on the inverted arch formwork, and the pouring system includes a concrete tank, a self-propelled trolley and a grouting pipe. The concrete tank is installed on the self-propelled trolley, and the self-propelled trolley moves on the first locomotive track by its own power. One end of the grouting pipe is connected to the concrete tank, and the other end of the grouting pipe extends to the pouring window.

[0008] The lifting track device is connected to the center groove template, and before pouring, the center groove template is installed below the inverted arch template; when pouring is completed and the second lining is poured and filled, the operator levels the horizontal surface of the inverted arch through the lifting track device for pouring; after the horizontal surface of the inverted arch is poured and initially set, the center groove template is demolded through the lifting track device to complete the pouring of the inverted arch.

[0009] Optionally, the lifting track device includes a telescopic arm, an outer walking platform, a second locomotive track and a center groove connecting device;

[0010] One end of the telescopic arm is connected to the TBM connecting bridge, and the other end of the telescopic arm is connected to the outer walking platform;

[0011] The second locomotive track is installed on the outer walking platform;

[0012] A center groove connecting device is installed on the end surface of the outer walking platform away from the second locomotive track, and the center groove connecting device is connected to the center groove template.

[0013] Optionally, the transport trolley includes a walking wheel mechanism, a driving device, a transport frame and a telescopic device; the walking wheel mechanism is movably connected to the TBM connecting bridge; the driving device is used to drive the walking wheel mechanism to move on the TBM connecting bridge; one end of the telescopic device is connected to the transport frame, and the other end of the telescopic device is fixedly connected to the TBM connecting bridge, and the telescopic device is used to drive the transport frame to move relative to the TBM connecting bridge in a vertical direction.

[0014] Optionally, a single set of casting windows is provided with a plurality of pieces spaced apart from each other along the length direction of the formwork body;

[0015] And lifting devices are provided on both sides of the two groups of casting windows.

[0016] Optionally, the grouting pipe is configured as a telescopic grouting pipe structure.

[0017] Optionally, a rotary drive member is further provided between the grouting pipe and the concrete tank, one end of the rotary drive member is fixedly connected to the concrete tank, and the other end of the rotary drive member is fixedly connected to the grouting pipe.

[0018] As a further solution of the present invention, the TBM invert casting device further includes a flip track platform;

[0019] The flip track platform is used to provide a load-bearing track for the rear locomotive to enter the front end of the TBM, and the flip track platform includes a movable track platform and a wire rope winch. The fixed end of the wire rope winch is connected to the TBM connecting bridge, and the driving end of the wire rope winch is connected to the movable track platform for driving the movable track platform to open or close.

[0020] The present invention also provides a TBM connection bridge synchronous invert cast-in-place method, comprising:

[0021] After the initial arch model is formed by steel bar binding, the TBM arch casting device as described above is used for concrete casting. First, the carrier trolley moves to the rear end and overlaps with the track of the lifting track device. The casting system moves from the rear end of the TBM through the lifting track device to the track end of the carrier trolley. The carrier trolley moves forward and steps to the steel bar area, and uses the telescopic arm to close the arch template to the tied steel bar end. The casting system casts the steel bar mold. After the casting is completed, the arch template is demoulded by the telescopic arm after the concrete is initially set. After the TBM excavates to the front end where there is a ring of steel bar mold, the ring is cast.

[0022] After the inverted arch pouring and filling is completed, the inverted arch pouring and filling section enters the next mold-building stage. At this time, the central groove template is installed in the completed inverted arch pouring and filling section by using the lifting track device and the upper part of the inverted arch is filled and smoothed with concrete. After the concrete is formed, the lifting track device is used to demould;

[0023] When the invert casting is completed for all the trailer sections set at the rear end of the TBM, the first locomotive track installation section is entered;

[0024] After the invert reaches the strength to bear the weight of the locomotive, the middle flip track platform is opened, and the operator enters the invert area to lay the track reserved in the spray-mix area on the invert;

[0025] When all the trailers of the TBM are completely detached from the rear track, the rear track can be disassembled and installed on the invert, thus completing the laying of the invert and four tracks and three lines.

[0026] Optionally, the method for synchronous in-situ cast-in-place of a TBM connecting bridge provided by the present invention is also provided with a slope track section, and a locomotive for transporting materials travels from the invert track to the trailer middle platform track via the slope track section to transport the materials to the TBM invert casting section.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The TBM invert casting device provided by the present invention is connected with the connecting bridge of the TBM to achieve the purpose of synchronous TBM excavation and cast-in-place invert casting. Specifically, a center groove template and a lifting track device are set in the connector area. Before casting, the center groove template is installed under the invert template. After the poured and filled concrete is initially set, the center groove template is demolded by using the lifting track device to complete the invert casting.

[0029] (2) The TBM invert casting device provided by the present invention is arranged in the connecting bridge area of ​​the TBM so that the required power sources such as electricity, gas, and liquid are shared with the TBM. It has a simple structure, is convenient and practical, and has good economy. It can also effectively enable construction personnel in the TBM spraying and mixing area to operate the spraying and mixing and lining invert construction at the same time, which is convenient for construction, saves personnel expenses, and has good economy.

[0030] (3) The TBM invert casting device provided by the present invention, by providing the first locomotive track and the second locomotive track, does not need to lay temporary locomotive tracks for transporting materials during the invert casting process, and the tracks and the invert are formed at one time; compared with prefabricated inverts, the cost is reduced.

[0031] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 It is a schematic diagram of the overall structure of a TBM invert casting device in an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A schematic cross-sectional view of the middle transport trolley;

[0035] Figure 3 yes Figure 1 Schematic diagram of the cross section at the middle inverted arch formwork;

[0036] Figure 4 yes Figure 1 The main schematic diagram of the middle inverted arch formwork;

[0037] Figure 5 yes Figure 4 Schematic diagram of top view;

[0038] Figure 6 yes Figure 1 Schematic diagram of the cross section at the center slot template;

[0039] Figure 7 yes Figure 1 Structural diagram of the pouring system;

[0040] Figure 8 yes Figure 7 A side view schematic diagram of

[0041] Fig. 9 yes Figure 1 A schematic cross-sectional view of the middle lifting rail device;

[0042] Fig.10 yes Figure 1 A schematic cross-sectional view of the middle flip track platform;

[0043] Fig.11It is a schematic diagram of TBM synchronous cast-in-place invert arch forming and four tracks and three lines in an embodiment of the present invention.

[0044] in:

[0045] 1. Carrying trolley, 101. Traveling wheel mechanism, 102. Driving device, 103. Carrying frame, 104. Telescopic device;

[0046] 2. Inverted arch formwork, 201. Casting window, 202. First locomotive track, 203. Hoisting device;

[0047] 3. Center slot template,

[0048] 4. Casting system, 401, concrete tank, 402, self-propelled trolley, 403, grouting pipe;

[0049] 5. Lifting track device, 501. Telescopic arm, 502. Outer walking platform, 503. Second locomotive track, 504. Center trough connecting device;

[0050] 6. Flip track platform, 601. Movable track platform, 602. Wire rope winch. DETAILED DESCRIPTION

[0051] In order to make the above-mentioned purposes, features and advantages of the present invention more clear and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings of the present invention are all simplified and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the implementation of the present invention; the "number" mentioned in the present invention is not limited to the specific number in the examples in the accompanying drawings; the directions or positional relationships indicated by "front", "middle", "back", "left", "right", "up", "down", "top", "bottom", "middle", etc. mentioned in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor can they be understood as limitations on the present invention.

[0052] Example:

[0053] See also Figures 1 to 10 As shown, the present invention provides a TBM invert casting device capable of realizing the function of tunneling and lining the invert at the same time, including a carrying trolley 1, an invert template 2, a center groove template 3, a casting system 4, a lifting track device 5 and a turning track platform 6.

[0054] The transport trolley 1 includes a walking wheel mechanism 101, a driving device 102, a carrying frame 103 and a telescopic device 104; the walking wheel mechanism 101 is movably connected to the TBM connecting bridge; the driving device 102 is used to drive the walking wheel mechanism 101 to move on the TBM connecting bridge; one end of the telescopic device 104 is connected to the transport frame 103, and the other end of the telescopic device 104 is fixedly connected to the TBM connecting bridge, and the telescopic device 104 is used to drive the transport frame 103 to move relative to the TBM connecting bridge in the vertical direction.

[0055] The inverted arch formwork 2 comprises a formwork body, a casting window 201 arranged on the formwork body, a first locomotive rail 202 and a lifting device 203; the first locomotive rail 202 is extended along the length direction of the formwork body, the casting window 201 is provided with two groups respectively arranged on both sides of the first locomotive rail 202, a single group of first locomotive rails 202 is provided with multiple pieces arranged at intervals along the length direction of the formwork body, and the lifting device 203 is provided with two groups respectively arranged on both sides of the two groups of casting windows 201. Preferably, the length of the inverted arch formwork 2 is preferably set to 10 meters. In the present invention, the inverted arch formwork is used to help the flatness of the casting of the inverted arch and improve the casting quality of the inverted arch. Further preferably, the lifting device 203 is preferably set to a hook that is convenient for connecting to a lifting system (such as a structure such as a lifting cable). Further preferably, in order to facilitate the smooth lifting of the inverted arch formwork 2, the lifting device 203 is provided with multiple groups symmetrically arranged along the central axis of the inverted arch formwork 2.

[0056] The center groove template 3 is connected to the lifting track device 5. The center groove template 3 is used for opening the center groove of the inverted arch. When the center groove template 3 is used, the lifting track device 5 is lowered, and the cast concrete is demoulded by the lifting track device 5 after initial setting, and the next ring of the inverted arch is cast.

[0057] The pouring system 4 is used to pour concrete after the steel bars are tied, and the pouring system 4 includes a concrete tank 401, a self-propelled trolley 402 and a grouting pipe 403. The self-propelled trolley 402 is displaced on the first locomotive track 202 by its own power, and the grouting pipe 403 is driven to rotate by an oil cylinder, and the grouting pipe 403 can be extended and retracted according to the use length to facilitate grouting of the bottom and the side.

[0058] The lifting rail device 5 is connected to the center groove template 3, and the lifting rail device 5 includes a telescopic arm 501, an outer walking platform 502, a second locomotive track 503 and a center groove connecting device 504. The outer walking platform 502 is used by the operator to level the pouring arch surface, and the telescopic arm 501 is used to demould the center groove template 3. Specifically, one end of the telescopic arm 501 is connected to the TBM connecting bridge, and the other end of the telescopic arm 501 is connected to the outer walking platform 502; the second locomotive track (503) is installed on the outer walking platform 502; the center groove connecting device 504 is installed on the end surface of the outer walking platform 502 away from the second locomotive track 503, and the center groove connecting device 504 is connected to the center groove template 3. The telescopic arm 501 drives the outer walking platform 502 to move in the vertical direction, thereby driving the center groove template 3 to move in the vertical direction, so as to realize the placement or demoulding of the center groove template 3. Preferably, the center groove connection device 504 is preferably arranged in the middle of the outer walking platform 502, the telescopic arm 501 is preferably provided with two groups symmetrically arranged along the center groove connection device 504, and a single group of telescopic arms 501 is preferably provided with at least one; the second locomotive track 503 is provided with two groups correspondingly arranged along the center groove connection device 504. Further preferably, the center groove connection device 504 is detachably connected to the center groove template 3.

[0059] The flip track platform 6 is used to provide a bearing track for the rear locomotive to enter the front end of the TBM, and the flip track platform 6 includes a movable track platform 601 and a wire rope winch 602. The movable track platform 601 is opened by the wire rope winch 602 to facilitate construction personnel to enter the invert surface to lay the second locomotive track 503.

[0060] The present invention also provides a TBM synchronous cast-in-place invert method, comprising the following steps:

[0061] 1) Slag removal section: After the TBM spraying area is finished, the excavator in the tunnel is used to remove the slag from the TBM walking track and the steel bar binding area, and the slag is transported away by the slag removal belt conveyor;

[0062] 2) Rebar tying section: The personnel promptly laid the TBM tracks on both sides and reserved two tracks for later track laying on the invert surface, and tied the steel bars on the bottom of the tunnel to form the initial shape of the invert model;

[0063] 3) Inverted arch pouring filling section: After the initial inverted arch model is formed by steel bar binding, the transport trolley 1, the inverted arch formwork 2, and the pouring system 4 in the connecting bridge area are used for concrete pouring. First, the transport trolley 1 moves to the rear end and overlaps with the track of the lifting track device 5. The pouring system 4 travels from the rear end of the TBM through the lifting track device 5 to the track end of the transport trolley 1. The transport trolley 1 moves forward and steps to the steel bar area, and uses the telescopic arm to press the inverted arch formwork 2 against the tied steel bar end. The pouring system 4 pours the steel bar mold. After the pouring is completed, the inverted arch formwork is demoulded by the telescopic arm after the concrete is initially set. After the TBM is excavated to the front end, there is a ring (10-meter inverted arch) of steel bar molds, and the ring is poured;

[0064] 4) Casting and filling section: After the casting and filling of the inverted arch is completed, the casting and filling section of the inverted arch enters the next 10-meter mold-building stage. At this time, the central groove template is installed in the completed casting and filling section of the inverted arch by using the lifting track device 5 and the upper part of the inverted arch is filled and smoothed with concrete. After the concrete is formed, the lifting track device 5 is used for demoulding;

[0065] 5) Invert maintenance section: There are 5 trailers at the rear end of the TBM, with a total length of about 55 meters. There is a locomotive running track fixed in the middle of each trailer. For a large-diameter TBM, it takes at least 3 days to excavate from the bridge pouring area to the track laying area at the rear of the trailer. The excavation time of the TBM in this stage can meet the requirements of the invert strength. There is no need to stop the TBM due to waiting for the invert to be strong. When the invert reaches the 5th trailer section, it can enter the locomotive track installation section;

[0066] 6) Locomotive track installation section: After the invert reaches the strength to bear the weight of the locomotive, the middle flip track platform 6 of the trailer is opened, so that personnel can easily enter the invert area, and the track reserved in the spray-mixing area is laid on the invert, so as to ensure that the passage of the locomotive transporting materials from outside the tunnel will not be interrupted;

[0067] 7) Slope track section: Since the track on the platform of the trailer is at a different height from the track on the invert, a slope track section is set to bridge the height difference. The locomotive transporting materials can travel from the invert track to the middle platform track of the trailer via the slope track section, thereby transporting the materials to the TBM invert casting section.

[0068] 8) When all trailers of the TBM are completely off the rear track, the rear track can be disassembled and installed on the invert, thus completing the laying of the invert and four tracks and three lines (see Fig.11 shown).

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A TBM invert casting device, characterized in that: It comprises a transport trolley (1), an inverted arch formwork (2), a central trough formwork (3), a pouring system (4) and a lifting track device (5); The transport trolley (1) is slidably connected to the connecting bridge in the TBM and is used to transport concrete; The inverted arch formwork (2) is installed on a carrying trolley (1), and the inverted arch formwork (2) comprises a formwork body, a casting window (201) and a first locomotive track (202) arranged on the formwork body, wherein the first locomotive track (202) is extended along the length direction of the formwork body, and the casting window (201) is provided with two groups respectively arranged on both sides of the first locomotive track (202); The pouring system (4) is installed on the inverted arch formwork (2), and the pouring system (4) comprises a concrete tank (401), a self-propelled trolley (402) and a grouting pipe (403); the concrete tank (401) is installed on the self-propelled trolley (402); the self-propelled trolley (402) moves on the first locomotive track (202) by its own power; one end of the grouting pipe (403) is connected to the concrete tank (401), and the other end of the grouting pipe (403) extends to the pouring window (201); The lifting track device (5) is connected to the central groove template (3). Before pouring, the central groove template (3) is installed below the inverted arch template (2); when pouring is completed and the second lining is poured and filled, the operator uses the lifting track device (5) to level the horizontal surface of the inverted arch for pouring; after the pouring of the horizontal surface of the inverted arch is completed and initially set, the central groove template (3) is demolded by the lifting track device (5) to complete the pouring of the inverted arch.

2. The TBM invert casting device according to claim 1, characterized in that: The lifting track device (5) comprises a telescopic arm (501), an outer walking platform (502), a second locomotive track (503) and a central groove connecting device (504); One end of the telescopic arm (501) is connected to the TBM connection bridge, and the other end of the telescopic arm (501) is connected to the outer walking platform (502); The second locomotive track (503) is installed on the outer walking platform (502); A center groove connecting device (504) is installed on the end surface of the outer walking platform (502) away from the second locomotive track (503), and the center groove connecting device (504) is connected to the center groove template (3).

3. The TBM invert casting device according to claim 1, characterized in that: The transport trolley (1) comprises a walking wheel mechanism (101), a driving device (102), a transport frame (103) and a telescopic device (104); the walking wheel mechanism (101) is movably connected to a TBM connecting bridge; the driving device (102) is used to drive the walking wheel mechanism (101) to move on the TBM connecting bridge; one end of the telescopic device (104) is connected to the transport frame (103), and the other end of the telescopic device (104) is fixedly connected to the TBM connecting bridge; the telescopic device (104) is used to drive the transport frame (103) to move relative to the TBM connecting bridge in a vertical direction.

4. The TBM invert casting device according to claim 1, characterized in that: A single group of pouring windows (201) is provided with a plurality of pieces spaced apart from each other along the length direction of the template body; Furthermore, lifting devices (203) are provided on both sides of the two groups of casting windows (201).

5. The TBM invert casting device according to claim 1, characterized in that: The grouting pipe (403) is configured as a telescopic grouting pipe structure.

6. The TBM invert casting device according to claim 1, characterized in that: A rotary drive member is also provided between the grouting pipe (403) and the concrete tank (401), one end of the rotary drive member is fixedly connected to the concrete tank (401), and the other end of the rotary drive member is fixedly connected to the grouting pipe (403).

7. The TBM invert casting device according to any one of claims 1 to 6, characterized in that: Also includes a flip track platform (6); The tiltable track platform (6) is used to provide a bearing track for a rear locomotive to enter the front end of the TBM, and the tiltable track platform (6) comprises a movable track platform (601) and a wire rope winch (602), wherein the fixed end of the wire rope winch (602) is connected to the TBM connection bridge, and the driving end of the wire rope winch (602) is connected to the movable track platform (601) for driving the movable track platform (601) to open or close.

8. A method for synchronous invert cast-in-place of a TBM bridge connection, characterized in that: include: After the initial shape of the inverted arch model is completed by tying the steel bars, the TBM inverted arch casting device as described in any one of claims 1 to 7 is used for concrete pouring. First, the transport trolley moves to the rear end and overlaps with the track of the lifting track device. The casting system moves from the rear end of the TBM through the lifting track device to the track end of the transport trolley. The transport trolley moves forward and steps to the steel bar area, and uses the telescopic arm to press the inverted arch template against the tied steel bar end. The casting system casts the steel bar mold. After the pouring is completed, the inverted arch template is demoulded by the telescopic arm after the concrete is initially set. After the TBM is excavated to a ring of steel bar molds at the front end, the ring is cast. After the inverted arch pouring and filling is completed, the inverted arch pouring and filling section enters the next mold-building stage. At this time, the central groove template is installed in the completed inverted arch pouring and filling section by using the lifting track device and the upper part of the inverted arch is filled and smoothed with concrete. After the concrete is formed, the lifting track device is used to demould; When the invert casting is completed for all the trailer sections set at the rear end of the TBM, the first locomotive track installation section is entered; After the invert reaches the strength to bear the weight of the locomotive, the middle flip track platform is opened, and the operator enters the invert area to lay the track reserved in the spray-mix area on the invert; When all the trailers of the TBM are completely detached from the rear track, the rear track can be disassembled and installed on the invert, thus completing the laying of the invert and four tracks and three lines.

9. The method for synchronous invert cast-in-place of a TBM bridge according to claim 8, characterized in that: There is also a slope track section, through which the locomotive transporting materials travels from the invert track to the trailer middle platform track to transport the materials to the TBM invert casting section.

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