Separating type TBM synchronous lining construction method

Abstract

The invention relates to a separated TBM synchronous lining construction method and device.The separated TBM synchronous lining construction method comprises the steps that firstly, after TBM tunneling, prefabricated inverted arch blocks are laid in a synchronous follow-up mode, transportation rails are installed on the prefabricated inverted arch blocks, symmetrical turnouts are arranged on the transportation rails, and conversion of transportation lines is achieved; then, after the prefabricated inverted arch block and the track are laid, the needle beam inverted arch trolley follows the cast-in-situ low side wall to serve as a foundation of a running rail of construction equipment in the subsequent process; next, after construction of the short side wall is completed, the steel bar trolley equipment follows up to conduct secondary lining steel bar binding, and after binding of the secondary lining steel bars is completed, the steel bar trolley moves forwards to the next construction position; then, after secondary lining steel bars are bound, a secondary lining trolley follows up to carry out secondary lining concrete pouring; and finally, after the concrete is poured and solidified, the curing trolley follows up to the same station to cure the concrete.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a separated TBM synchronous lining construction method. Background Art

[0002] With the acceleration of the pace of tunnel construction in my country, TBM, as an integrated mechanical, electrical, hydraulic, sensor and control construction equipment, has the advantages of good construction environment, fast speed and low cost for long-distance construction, and is widely used. In the past, whether the slag was discharged by rail transportation or continuous belt conveyor during TBM construction, secondary mold lining was carried out after the TBM excavation was completed. It was impossible to achieve the simultaneous construction of TBM excavation and secondary mold lining, the construction period was long, and it was inconsistent with the construction principle of the New Austrian Tunneling Method. It was inconsistent with the requirements issued by the Ministry of Railways, the Ministry of Construction and other ministries and commissions that the distance between the secondary lining and the tunnel excavation face should not exceed the limit determined by the document specifications. Considering the construction safety, shortening the total construction period of the tunnel, and economy, TBM construction and synchronous tunnel lining have become an important development trend.

[0003] According to the different locations of the secondary synchronous lining equipment, the overall synchronous lining construction plan mainly includes two types: integral type and separate type. In the integral type, the secondary synchronous lining equipment and the TBM rear equipment are combined into a whole. In the separate type, the secondary synchronous lining equipment and the TBM rear equipment are appropriately separated and maintain a reasonable distance.

[0004] The integrated solution is to add secondary synchronous lining equipment to the conventional TBM rear-end equipment, including needle beam low side wall trolley, steel bar trolley, secondary lining trolley, maintenance trolley and other construction equipment, and connect the secondary synchronous lining equipment with the TBM rear-end equipment into one.

[0005] The separation scheme is that the TBM excavation construction and the secondary lining are carried out in parallel, and the secondary cast concrete lining construction is arranged to follow up in time after the TBM excavation. The lining trolley should be designed in a structural way to take into account the passage of continuous belt conveyors, ventilation hoses, water pipes, high-voltage and communication cables, and transport vehicles. In addition, the transportation of construction materials, the operation of continuous belt conveyors, ventilation, high-voltage power supply, lighting and communication, water supply, and drainage required for TBM construction should not be interrupted during all operations of the trolley.

[0006] However, there are many difficulties in the current construction method of separate TBM synchronous lining. For example, the distance between the TBM excavation face and the secondary lining working face is large, which does not meet the relevant requirements; construction material transportation, continuous belt conveyors, large-diameter ventilation hoses, etc. need to smoothly pass through the synchronous lining trolley and ensure smooth operation, etc. In particular, it must be ensured that no matter what working state the secondary lining operation is in, such as trolley shifting, formwork erection, pouring, maintenance, demoulding, etc., it will not affect the power supply, communication, ventilation, water supply and drainage, construction material transportation, and waste slag transportation required for TBM construction; the inner diameter of the section after lining of the TBM excavation section is 10.2m~10.6m, and there are multiple section radius changes. How to realize the rapid section change conversion of the secondary lining template is also a key issue.

[0007] Therefore, how to provide a construction method so that various types of trolleys and transportation devices do not interfere with each other during the synchronous lining construction of the separated TBM, improve construction efficiency, and save construction time is a technical problem that needs to be urgently solved in this field. Summary of the invention

[0008] In order to solve at least one or more of the above technical problems, the present invention provides a separate TBM synchronous lining construction method, which fundamentally solves the technical bottleneck of delayed lining construction, and also meets the requirements of the distance between the secondary lining and the excavation face promulgated by the state, thereby improving the overall construction speed. The present invention provides a separate TBM synchronous lining construction method, comprising:

[0009] S10. After TBM excavation, prefabricated invert blocks are laid synchronously, and transport tracks are installed on the prefabricated invert blocks. Symmetrical switches are set on the transport tracks to realize the conversion of transport tracks.

[0010] S20. After the prefabricated invert blocks and track laying are completed, the needle beam invert trolley follows the cast-in-place low side wall, which serves as the basis for the running track of the subsequent construction equipment;

[0011] S30. After the construction of the low side wall is completed, the steel bar trolley equipment follows up to tie the second lining steel bars. After the second lining steel bars are tied, the steel bar trolley moves forward to the next construction location;

[0012] S40. After the second lining reinforcement is tied, the second lining trolley follows up to pour the second lining concrete;

[0013] S50: After the concrete is poured and solidified, the curing trolley follows to the same workstation to cure the concrete;

[0014] Among them, the TBM synchronous lining construction area includes the low side wall construction area, the steel bar construction area, the side top arch construction area, and the secondary lining maintenance area. The low side wall construction area is equipped with at least 2 needle beam arch trolleys, the steel bar construction area is equipped with at least 2 steel bar trolleys, and the side top arch construction area is equipped with at least 2 secondary lining trolleys. The low side wall construction area, the steel bar construction area, and the side top arch construction area are all constructed using the skip-bin operation method.

[0015] Furthermore, step S20 includes:

[0016] After the prefabricated invert arch block and transport track are installed, the needle beam invert arch trolley moves forward to tie the steel bars of the short side wall. After the steel bars are tied, the template demoulding cylinder of the needle beam invert arch trolley is controlled to extend to put the short side wall template in place and support it firmly. The track-mounted concrete transport vehicle drives to that place to pour concrete for the short side wall. After the concrete solidifies, the support is removed and the template demoulding cylinder is controlled to retract to separate the short side wall template from the concrete. After the template is demoulded, the needle beam invert arch trolley moves forward to the next construction position. After the concrete strength of the short side wall reaches the requirement, steel supports are laid on its upper surface for the laying of equipment tracks to facilitate the passage of subsequent construction equipment.

[0017] Furthermore, step S30 includes:

[0018] A steel bar lifting trolley and a steel bar installation trolley are used. The steel bar lifting trolley is used to quickly unload the steel bars from the transport vehicle and lift them onto the steel bar installation trolley. The secondary lining steel bars are uniformly processed outside the hole as required, transported to the site, and finally manually installed and tied on the steel bar installation trolley.

[0019] Furthermore, the installation of the second lining steel bars is controlled by a steel bar positioning frame. According to the measured control points, the outer layer of annular positioning steel bars are first tied, and after the positioning steel bars are connected with longitudinal bars, the longitudinal bars are used as the basis for the installation of other annular bars. After the outer layer is tied, the inner layer of steel bars are installed in the same way, and the inner and outer layers of steel bars are promptly connected with stirrups and spot welded by arc welding to enhance the overall rigidity.

[0020] Furthermore, step S40 includes:

[0021] A pump truck and a secondary lining trolley are used in a one-to-one ratio. The pump truck is responsible for pumping concrete to the secondary lining trolley, and the secondary lining trolley sets up the mold and pours concrete. When pouring concrete, it is poured symmetrically from bottom to top, with both sides carried out simultaneously or alternately.

[0022] Further, in step S20, the needle beam arch trolley includes a needle beam part, a beam frame part and a cross plate part, wherein the beam frame part is a rectangular frame formed by connecting square tubes; after the needle beam part passes through the beam frame part, it is slidably arranged with the beam frame part; the beam frame part is a rectangular frame formed by connecting square tubes; the cross plate part is recoverably fixed to the bottom end of the beam frame part, and is extended along the length direction of the cross plate part; the needle beam part includes a needle beam, at least two groups of needle beam bases and at least two groups of needle beam transverse movement mechanisms, wherein the needle beam is a double-web box-type structure welded by a panel and supporting ribs; the needle beam bases are arranged on the bottom surfaces of the two end sides of the needle beam, and are connected to the needle beam through a needle beam transverse movement mechanism; one end of the needle beam transverse movement mechanism is slidably fixed on the top end surface of the needle beam base, extending along the transverse direction of the needle beam, and the other end arranged oppositely is fixed to the needle beam as a whole, and is arranged to move together.

[0023] Further, in step S30, the steel bar trolley includes a steel bar lifting trolley and a steel bar installation trolley arranged in front of the steel bar installation trolley, and the steel bar trolley is provided with a two-layer push-pull working platform.

[0024] Further, in step S40, the secondary lining trolley includes a portal assembly, a variable diameter telescopic assembly, a lining template assembly and an extension assembly;

[0025] The lining formwork assembly comprises a plurality of arc-shaped formworks connected in sequence and detachably arranged on the periphery of the portal frame assembly;

[0026] The variable diameter telescopic assembly is arranged between the portal assembly and the lining formwork assembly, and its telescopic movement drives the lining formwork assembly to increase or decrease its diameter;

[0027] An extension assembly is used to be arranged at the notch of the lining formwork assembly when the diameter of the lining formwork assembly increases;

[0028] The lining template components are arranged in two groups symmetrically along the central axis of the lining trolley; among the adjacent connected arc templates, at least one pair of arc templates is detachably connected; and the extension component is detachably arranged between the adjacent detachable arc templates.

[0029] Furthermore, in steps S10 to S50, during the movement of the needle beam inverted arch trolley, the steel bar trolley, the secondary lining trolley and the maintenance trolley, a pipeline crossing device is used to cross the pipeline, and a line crossing device is used to cross the line.

[0030] Furthermore, the pipeline crossing device comprises: a traveling support, a support seat arranged above the traveling support and a stinger;

[0031] The walking support is arranged on the lifting and lowering moving device and moves relative to the moving device in the vertical direction;

[0032] The stinger rack is arranged above the support seat for sliding left and right, and is used for carrying the pipeline.

[0033] In this embodiment, a separated TBM synchronous lining construction method is provided. In the separated TBM synchronous lining construction process, various trolleys and transportation equipment run on the transportation tracks set on the prefabricated invert arch blocks, and complete the track change on the symmetrical turnouts, so that the various trolleys and transportation devices do not interfere with each other when working; according to the entire construction steps, the TBM synchronous lining construction area is divided into a low side wall construction area, a steel bar construction area, a side top arch construction area, and a secondary lining maintenance area. According to the TBM excavation speed and construction interval, a reasonable number of trolleys and transportation equipment are set in each area, which greatly shortens the downtime caused by waiting for lining in the traditional "excavation-dismantling-lining" construction method, which greatly improves the construction efficiency and saves construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings, the same parts are marked with the same reference numerals. The drawings are not drawn according to the actual scale.

[0035] Figure 1 It is a flow chart of an embodiment of the separated TBM synchronous lining construction method of the present invention;

[0036] Figure 2 It is a schematic diagram of an embodiment of a needle beam inverted arch trolley of a separated TBM synchronous lining construction method of the present invention;

[0037] Figure 3 It is a schematic diagram of the partial structure of an embodiment of the needle beam inverted arch trolley of the separated TBM synchronous lining construction method of the present invention.

[0038] Figure 4 It is a schematic diagram of an embodiment of a pipeline crossing device of a separated TBM synchronous lining construction method of the present invention;

[0039] Figure 5 It is a schematic diagram of an embodiment of a line crossing device of the separated TBM synchronous lining construction method of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0042] It should also be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In addition, if the embodiments of the present invention involve descriptions of "first, second", "S1, S2", "step one, step two", etc., then such descriptions are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that anything that does not violate the gist of the invention under the technical concept of the invention should be included in the protection scope of the present invention.

[0043] The present invention provides a separated TBM synchronous lining construction method, referring to Figure 1 ,include:

[0044] S10. After TBM excavation, prefabricated invert blocks are laid synchronously, and transportation tracks are installed on the prefabricated invert blocks. Symmetrical switches are set on the transportation tracks to realize the conversion of transportation lines.

[0045] S20. After the prefabricated invert blocks and track laying are completed, the needle beam invert trolley follows the cast-in-place low side wall as the foundation for the running track of the subsequent construction equipment;

[0046] S30. After the construction of the low side wall is completed, the steel bar trolley equipment follows up to tie the second lining steel bars. After the second lining steel bars are tied, the steel bar trolley moves forward to the next construction location;

[0047] S40. After the second lining reinforcement is tied, the second lining trolley follows up to pour the second lining concrete;

[0048] S50: After the concrete is poured and solidified, the curing trolley follows to the same workstation to cure the concrete;

[0049] Among them, the TBM synchronous lining construction area includes the low side wall construction area, the steel bar construction area, the side top arch construction area, and the secondary lining maintenance area. The low side wall construction area is equipped with at least 2 needle beam arch trolleys, the steel bar construction area is equipped with at least 2 steel bar trolleys, and the side top arch construction area is equipped with at least 2 secondary lining trolleys. The low side wall construction area, the steel bar construction area, and the side top arch construction area are all constructed using the skip-bin operation method.

[0050] In this embodiment, a separated TBM synchronous lining construction method is provided. First, prefabricated invert blocks are laid, and on the prefabricated invert blocks, transport tracks are installed on the prefabricated invert blocks, and symmetrical turnouts are set on the transport tracks. The symmetrical turnouts are used for transport track conversion of various transport equipment. It is worth noting that the number of tracks and the number of lines of the transport track can be arbitrarily set by those skilled in the art according to specific needs. For example, the transport track is a four-track double-line, and symmetrical turnouts are set on the transport track. During the synchronous lining construction, the track conversion requirements of various rail-mounted transport vehicles, rail-mounted concrete transport vehicles and various trolleys are met, and congestion of various trolleys and transport equipment in space is avoided, so that various trolleys and transport devices do not interfere with each other when working. Then, the needle beam arch trolley casts low side walls on both sides of the prefabricated arch block to support the prefabricated arch block and serve as the basis for the running track of the subsequent construction equipment, solving the problem of the subsequent construction equipment occupying the transportation track; next, based on the low side walls, a steel bar trolley is used to carry out secondary steel bar binding at the places where the subsequent second lining concrete is required to be poured; after the steel bar binding is completed, the steel bar trolley moves to the next construction position; then, the second lining trolley is used to pour concrete at the original secondary steel bar binding place, and the concrete is waited for solidification; finally, the solidified concrete is regularly cured by a curing trolley to prevent the water in the concrete from evaporating too quickly and causing shrinkage cracks; for example, at room temperature, the concrete is watered and cured by a curing trolley within 4 to 6 hours after pouring, watered 4 to 6 times a day within three days, and watered 2 to 3 times a day after three days, and the curing time is not less than 14 days.

[0051] It can be understood that the above steps can be carried out simultaneously or in sequence. According to the above construction steps, the entire TBM synchronous lining construction area includes: short side wall construction area, steel bar construction area, side top arch construction area, and secondary lining maintenance area. For example, in this scheme, the TBM excavation speed is 36m at the maximum daily advance, and the subsequent construction step is 9m. The time for the needle beam invert arch trolley to construct one mold of the short side wall is 0.5 day, the time for the steel bar trolley to construct one mold is 0.5 day, and the time for the secondary lining trolley to construct one mold is 1 day. In order to achieve synchronous lining, the short side wall The wall construction area is equipped with at least 2 needle beam and arch trolleys, the steel bar construction area is equipped with at least 2 steel bar trolleys, the side and top arch construction area is equipped with at least 2 secondary lining trolleys, and the secondary lining maintenance area is equipped with a maintenance trolley. The short side wall construction area, the steel bar construction area, and the side and top arch construction area are all constructed in a skip-bin operation mode. For example, the short side wall construction area is equipped with 2 needle beam and arch trolleys, and 4 bins are skipped for casting. The steel bar construction area is equipped with 2 steel bar trolleys, and 2 bins are constructed every day. The side and top arch construction area is equipped with 4 secondary lining trolleys, and 4 bins are skipped for construction, so as to meet the construction needs of synchronous lining.

[0052] During the construction of the separated TBM synchronous lining, various trolleys and transportation equipment are set up on the transport tracks on the prefabricated invert blocks and the track changes are completed on the symmetrical switches, so that the various trolleys and transportation equipment do not interfere with each other during operation; according to the entire construction steps, the TBM synchronous lining construction area is divided into the low side wall construction area, the steel bar construction area, the side top arch construction area, and the secondary lining maintenance area. According to the TBM excavation speed and construction interval, a reasonable number of trolleys and transportation equipment are set in each area, which greatly shortens the downtime caused by waiting for lining in the traditional "excavation-dismantling-lining" construction method, which greatly improves the construction efficiency and saves construction time.

[0053] More preferably, step S20 includes: after the prefabricated arch block and the transport track are installed, the needle beam arch trolley moves forward to tie the steel bars of the short side wall. After the steel bars are tied, the template demoulding cylinder of the needle beam arch trolley is controlled to extend to put the short side wall template in place and support it firmly, the track-mounted concrete transport vehicle drives to the location to pour concrete for the short side wall, and after the concrete solidifies, the support is removed and the template demoulding cylinder is controlled to retract to separate the short side wall template from the concrete. After the template is demoulded, the needle beam arch trolley moves forward to the next construction position. After the concrete strength of the short side wall reaches the requirement, a steel support is laid on its upper surface for laying the equipment passage track to facilitate the passage of subsequent construction equipment.

[0054] In this embodiment, a specific implementation method for the construction of the short side wall is given. The needle beam inverted arch trolley is used to first tie the steel bars of the short side wall, and then the template demoulding cylinder of the needle beam inverted arch trolley is controlled to extend so that the short side wall template is in place and firmly supported. On the one hand, the efficiency of steel bar tying of the short side wall can be improved. On the other hand, the demoulding cylinder is used to position and support the short side wall template, which can improve the position accuracy and size accuracy of the short side wall; then a track-mounted concrete transport vehicle is used to drive to this point to complete the pouring of concrete, and the template demoulding cylinder of the needle beam inverted arch trolley is retracted to separate the short side wall template from the concrete. The whole process can reduce manual operations and improve construction efficiency.

[0055] Preferably, in step S30, a steel bar lifting trolley and a steel bar installation trolley are used. The steel bar lifting trolley is used to quickly unload the steel bars from the transport vehicle and lift them onto the steel bar installation trolley; the secondary lining steel bars are uniformly processed outside the hole as required, transported to the site, and finally manually installed and tied on the steel bar installation trolley.

[0056] In this embodiment, after the construction of the low side wall is completed, due to the large tunnel, a large amount of steel bars are used; therefore, the second lining steel bars are first processed uniformly outside the tunnel hole as needed; specifically, the second lining steel bars need to be straightened first, and foreign matter such as oil stains, cement slurry, and floating rust on the surface need to be removed, and then bent according to the tunnel section; then, the bent steel bars are transported by a transport vehicle, and then the steel bar lifting trolley is used to quickly unload the steel bars on the transport vehicle and lift them onto the steel bar installation trolley. Finally, manual installation and binding are performed on the steel bar installation trolley, which can avoid the steel bar trolley occupying the track for too long and hindering the passage of other types of trolleys and transport equipment, thereby speeding up the construction progress.

[0057] More preferably, the installation of the second lining steel bars is controlled by a steel bar positioning frame. The outer layer of annular positioning steel bars are first tied according to the measured control points. After the positioning steel bars are connected with longitudinal bars, the longitudinal bars are used as the basis for the installation of other annular bars. After the outer layer is tied, the inner layer of steel bars are installed in the same way, and the inner and outer layers of steel bars are promptly connected with stirrups and spot welded by arc welding to enhance the overall rigidity.

[0058] In the embodiment, a specific method for tying the second lining steel bars is provided. The outer circumferential positioning steel bars, longitudinal bars, other circumferential bars and inner steel bars are sequentially constructed and installed, and then the inner and outer steel bars are connected with stirrups and spot-welded by arc welding, which greatly enhances the connection stiffness of the second lining steel bar tying and avoids deformation of the second lining steel bar tying to improve the accuracy of construction. More preferably, after the second lining steel bars are installed, the outline dimensions are checked according to the center line elevation to improve the accuracy and standardization of the construction; after passing the inspection, a certain thickness of mortar pads are hung on the inner steel bars to ensure the thickness of the steel bar protective layer after concrete pouring.

[0059] Preferably, step S40 includes: using a pump truck and a secondary lining trolley in a one-to-one ratio, the pump truck is responsible for pumping concrete to the secondary lining trolley, the secondary lining trolley sets up a mold, and pours concrete; when pouring concrete, pouring symmetrically from bottom to top, simultaneously or alternately on both sides.

[0060] In this embodiment, the pump truck and the second lining trolley are used in a one-to-one ratio. The pump truck is responsible for pumping concrete to the second lining trolley, and the second lining trolley is responsible for erecting the formwork. The two have clear division of labor. If a failure occurs during construction, the pump truck or the second lining trolley can be replaced to improve the stability of the construction method; when pouring concrete, the concrete is poured symmetrically from bottom to top, simultaneously or alternately on both sides, to reduce the impact of lateral pressure generated by the deadweight and vibration of the concrete during the pouring process on the formwork, prevent deformation of the formwork, and ensure that the concrete is evenly distributed inside the structure to avoid excessive temperature stress and shrinkage cracks; pouring on both sides simultaneously or alternately can speed up the construction progress and reduce the risk of concrete losing too much water or initial setting due to long-term exposure.

[0061] Preferably, reference Figure 2 and Figure 3 In step 20, the needle beam arch trolley includes a needle beam portion 10, a beam frame portion 20 and a cross plate portion 30, wherein the beam frame portion 20 is a rectangular frame formed by connecting square tubes; after the needle beam portion 10 passes through the beam frame portion 20, it is slidably arranged with the beam frame portion 20; the beam frame portion 20 is a rectangular frame formed by connecting square tubes; the cross plate portion 30 is recyclably fixed to the bottom end of the beam frame portion 20, and is extended along the length direction of the cross plate portion 30; the needle beam portion 10 includes a needle beam 11, at least two sets of needle beam bases 12 and at least two sets of needle beam transverse movement mechanisms 14, wherein the needle beam 11 is a double web plate formed by welding a panel and a supporting rib Box-type structure; the needle beam base 12 is arranged on the bottom surface of the two end sides of the needle beam 11, and is connected to the needle beam 11 through a needle beam transverse movement mechanism 14; one end of the needle beam transverse movement mechanism 14 is slidably fixed on the top surface of the needle beam base 12, extending along the transverse direction of the needle beam 11, and the other end relatively arranged is fixed to the needle beam 11 as a whole, and is arranged to move together; thus, through the needle beam transverse movement mechanism extending along the transverse direction of the needle beam and slidingly arranged with the needle beam base, the position adjustment of the entire needle beam part in the transverse direction can be realized extremely conveniently, and then the needle beam arch trolley can be adjusted at different process positions, which greatly improves the construction efficiency.

[0062] In addition, in order to improve the stability of the needle beam inverted arch trolley after assembly at the tunnel construction site, the broken side surface of the needle beam base 12 away from the farthest end of the needle beam 11 is set as an arc side surface. Tracks are set on the top and bottom surfaces of the needle beam 11 in the height direction to reduce the friction between the beam frame 20 when sliding.

[0063] Specifically, in a preferred embodiment, reference is made to Figure 3The needle beam transverse movement mechanism 14 includes a base 141, a translation seat 142 and a first telescopic cylinder 143, wherein the base 141 is fixed on the top surface of the needle beam base and extends along the width direction of the needle beam 11; the translation seat 142 is slidably fixed to the needle beam base 12 through one end of the base 141, and the other end oppositely arranged is connected to the needle beam 11 as a whole and moves together; one end of the first telescopic cylinder 143 is fixed to the base 141, and the other end oppositely arranged is fixed to the translation seat 142 as a whole and moves together. Therefore, under the drive of the first telescopic cylinder 143, the translation seat 142 drives the needle beam 11 to slide along the transverse direction of the needle beam 11, thereby realizing the position adjustment of the needle beam 11 in its width direction.

[0064] Optionally, in order to adjust the position of the needle beam portion 10 in the height direction, a needle beam lifting mechanism 13 is further included between the needle beam transverse movement mechanism 14 and the needle beam 11, one end of the needle beam lifting mechanism 13 is fixed to the needle beam base 12 through the needle beam transverse movement mechanism 14, and the other end oppositely arranged is fixed to the needle beam 11 as a whole, and is retractably arranged in the vertical direction. Preferably, the needle beam lifting mechanism 13 is retractably fixed to the end side surface of the short side of the needle beam 11. Furthermore, the needle beam lifting mechanism 13 includes a needle beam lifting sleeve 131, a needle beam guide rod 132 and a needle beam lifting cylinder 133, wherein the bottom end of the needle beam guide rod 132 is fixed on the top surface of the needle beam transverse movement mechanism 14, and the other end arranged oppositely extends upward along the vertical direction; the needle beam lifting sleeve 131 is sleeved on the outer peripheral side of the needle beam guide rod 132, and is fixed as a whole with the needle beam 11, and is arranged to move together; the needle beam lifting cylinder 133 is embedded in the internal cavity of the needle beam guide rod 132, one end of which is fixed on the needle beam transverse movement mechanism 14, and the other end arranged oppositely is telescopically fixed to the needle beam 11. Therefore, through the needle beam lifting cylinder telescopically arranged with the needle beam, the needle beam can be conveniently adjusted and controlled in the height direction as required.

[0065] In summary, the needle beam portion provided in the above embodiment, under the drive of the first telescopic cylinder, the translation seat drives the needle beam to slide along the lateral direction of the needle beam, thereby realizing the position adjustment of the needle beam in its width direction; through the needle beam lifting cylinder telescopically arranged with the needle beam, the needle beam can be conveniently adjusted and controlled in the height direction as needed, and then the position optimization and adjustment of the needle beam portion in the operation process can be realized, which has a wider range of applicable scenarios and significantly improves the construction efficiency.

[0066] Preferably, in step S30, the steel bar trolley includes a steel bar lifting trolley and a steel bar installation trolley arranged in front of the steel bar installation trolley, and the steel bar trolley is provided with a two-layer push-pull working platform.

[0067] In this embodiment, the steel bar trolley includes a steel bar lifting trolley and a steel bar installation trolley arranged in front of the steel bar installation trolley; the function of the steel bar lifting trolley is to lift the steel bars in the transport vehicle onto the steel bar lifting trolley, and store them on the platform on the steel bar lifting trolley, which plays the role of transferring and temporarily storing steel bars; the steel bar installation trolley is a workplace for operators to make, tie and install steel bars; the steel bar trolley is provided with a two-layer push-pull working platform, and the push-pull structure can greatly save space, making the steel bar trolley structure more compact, providing more working platforms for the steel bar trolley without affecting the movement of the trolley.

[0068] More preferably, the steel bar trolley includes a support frame, a walking part, and a steel bar conveying part, wherein the walking part is arranged at the bottom end of the support frame and moves with the support frame; the steel bar conveying part is fixed on the support frame and can be rotated relative to the support frame; the steel bar conveying part includes a placement platform, a top platform and a transfer device, the placement platform is horizontally fixed on the support frame and extends along the length direction of the support frame; the top platform is fixed on the placement platform and extends along the length direction of the support frame; the transfer device is arranged between the placement platform and the top platform, and the switching setting of the lifting of the steel bar can be realized between the placement platform and the top platform. Thus, by the transfer device arranged between the placement platform and the top platform, the lifting of the steel bar between the placement platform and the top platform can be realized extremely conveniently, and then the steel bar can be flexibly disposed of during the construction process, and the space utilization rate of the steel bar trolley supporting the TBM synchronous lining can be effectively utilized. While realizing the transfer, it has the function of temporary storage, and can provide a place for pre-processing of steel bar production, binding and installation, which greatly shortens the construction period and significantly improves the construction efficiency.

[0069] Preferably, in step S40, the secondary lining trolley includes a portal assembly, a variable diameter telescopic assembly, a lining template assembly and an extension assembly;

[0070] The lining formwork assembly comprises a plurality of arc-shaped formworks connected in sequence and detachably arranged on the periphery of the portal frame assembly;

[0071] The variable diameter telescopic assembly is arranged between the portal assembly and the lining formwork assembly, and its telescopic movement drives the lining formwork assembly to increase or decrease its diameter;

[0072] An extension assembly is used to be arranged at the notch of the lining formwork assembly when the diameter of the lining formwork assembly increases;

[0073] The lining template components are arranged in two groups symmetrically along the central axis of the lining trolley; among the adjacent connected arc templates, at least one pair of arc templates is detachably connected; and the extension component is detachably arranged between the adjacent detachable arc templates.

[0074] In this embodiment, a secondary lining trolley is provided. By setting a lining template assembly composed of several arc-shaped templates, a variable diameter telescopic assembly, and an extension assembly, the diameter of the lining trolley can be quickly and adaptively adjusted according to the actual situation of the tunnel currently under construction to increase its scope of use. Compared with the traditional method, when encountering a variable diameter situation, it is necessary to redesign and manufacture a new synchronous lining transport trolley to transport it to the construction site, which will greatly improve construction efficiency and reduce manpower, financial resources and time waste.

[0075] Preferably, the mast assembly comprises: a mast body, a stand and a telescopic member of the stand;

[0076] The gantry body is arranged on the track at the bottom of the tunnel;

[0077] A stand is detachably arranged on the mast body;

[0078] The telescopic member of the platform is arranged between the platform and the door frame body.

[0079] In this embodiment, the portal assembly includes a portal body and a platform, and a platform telescopic member is added between the two. When the diameter of the secondary lining trolley increases or decreases, the portal body located below remains stationary, and the platform telescopic member arranged between the portal body and the platform is extended or retracted, so that the platform located above rises or falls accordingly, ensuring that the corresponding center of the lining formwork assembly rises or falls, so that the overall skeleton of the portal assembly adapts to the change in the diameter of the secondary lining trolley, so as to better support and carry other components, and at the same time adapt to the change in the force angle caused by the change in the diameter of the lining formwork assembly, so as to improve the force condition of the entire portal assembly.

[0080] More preferably, the door frame assembly further includes a first adjusting member and / or a second adjusting member;

[0081] A first adjusting member is detachably mounted between the gantry body and the stand;

[0082] The second adjusting member is detachably installed between the stand and the lining formwork assembly.

[0083] In this embodiment, after the telescopic component has completed its telescopic extension, since the lining formwork assembly itself is very heavy, if the telescopic component continues to bear the gravity of the lining formwork assembly for a long time, the telescopic performance of the telescopic component will be damaged, and even the telescopic component will be damaged, causing the second lining trolley to be unusable. Therefore, a second adjusting member is added to the contact position between the gantry and the lining formwork assembly, and the second adjusting member is used to bear the gravity of the lining formwork assembly, which can increase the service life of the second lining trolley; at the same time, the distance adjusted by the second adjusting member is adapted to the change in the diameter of the tunnel variable section, and the telescopic change of the telescopic component is no longer used to adapt to the change in the diameter of the tunnel variable section, which can improve the accuracy of the diameter change.

[0084] Preferably, in steps S10 to S50, during the movement of the needle beam inverted arch trolley, the steel bar trolley, the secondary lining trolley, and the maintenance trolley, a pipeline crossing device is used to cross the pipeline, and a line crossing device is used to cross the line. In this embodiment, during the movement of the needle beam inverted arch trolley, the steel bar trolley, the secondary lining trolley, and the maintenance trolley, if a traditional method is adopted, various fixed supports such as mounting brackets are set on the tunnel wall to support various pipelines and lines. Since various trolleys often need to move up and down, left and right, and front and back, the fixed supports and the pipelines arranged on the fixed supports will interfere with the movement of the trolley. At this time, the fixed supports and the pipelines arranged on the fixed supports need to be removed to meet the needs of the trolley moving up and down, left and right, and front and back. The above-mentioned various situations will greatly waste time, manpower, and material resources, and also seriously affect the continuity and efficiency of construction. The use of pipeline crossing devices for pipeline crossing and line crossing devices for line crossing can avoid interference with pipelines during the movement of various trolleys. There is no need to dismantle fixed support parts such as mounting brackets. At the same time, pipelines and lines are supported, which improves the continuity and efficiency of construction and greatly saves time, manpower and material resources.

[0085] Specifically, refer to Figure 4 The pipeline crossing device includes: a traveling support 21, a support base 22 arranged above the traveling support 21, and a stinger 23;

[0086] The traveling support 21 is arranged on the lifting and lowering moving device and moves relative to the moving device in the vertical direction;

[0087] The stinger 23 is slidably disposed on the support seat 22 to support the pipeline.

[0088] In this embodiment, a pipeline crossing device is provided, and the stinger is used to carry the pipeline, provide support for the pipeline and enable the mobile device to move up and down, front and back, left and right. The pipeline carried on the stinger will not affect the movement of the mobile device. For example, taking the construction of the second lining trolley in the tunnel as an example, it needs to move up and down, front and back, left and right in the tunnel. The second lining trolley can be used as a mobile device, which can be raised and lowered on the traveling bracket, and the traveling bracket is set on the tunnel track, and the pipeline for tunnel construction is set on the stinger; 1. When the second lining trolley needs to move up and down, relative movement can occur on the traveling bracket. That is to say, when the second lining trolley moves up and down, the second lining trolley slides up and down relative to the traveling bracket, keeping the horizontal height of the pipeline carried in the upper stinger rack unchanged; for example, the pipeline crossing device is installed on the lining trolley, and the traveling bracket on the pipeline crossing device passes through the sliding hole of the bottom longitudinal beam of the lining trolley portal frame, and slides up and down relative to the bottom longitudinal beam of the lining trolley; at this time, the pipeline carried in the stinger rack does not move; 2. When the second lining trolley moves forward and backward on the tunnel, it can drive the traveling bracket to move forward and backward, and then drive the stinger rack to move forward and backward. The stinger rack also moves forward and backward relative to the pipeline, and the pipeline installed on the stinger rack does not move, and does not interfere with the forward and backward movement of the lining trolley; 3. When the second lining trolley moves left and right on the tunnel, it can drive the traveling bracket to move left and right, and then drive the support seat to slide left and right relative to the stinger rack. Since the weight of the pipeline itself is very large, and the friction force generated by the support seat relative to the stinger rack is very small, the stinger rack and the pipeline on the stinger rack do not move, and do not interfere with the left and right movement of the lining trolley. In summary, the pipeline crossing device can support the pipeline while preventing the pipeline from being affected by the up and down, front and back, left and right movements of the lining trolley; under the action of this pipeline crossing device, the device for fixing the pipeline does not need to be disassembled during the operation of various trolleys, thereby reducing pipeline wear, improving project quality, and reducing manual labor intensity.

[0089] Preferably, reference Figure 4 A support roller 211 is provided below the walking support 21; preferably, the support roller 211 is arranged at the position of the pipeline to be installed so as to be movable forward, backward, left and right;

[0090] More preferably, the upper end of the walking bracket 21 is rotatably connected to the right end of the support seat 22. For example, a telescopic member 212 is provided above the walking bracket 21;

[0091] The first end of the telescopic member 212 is hinged to the traveling support 21 , and the second end is hinged to the supporting seat 22 .

[0092] In this embodiment, several embodiments of the walking bracket 21 are provided, and a bracket roller is provided at the bottom to improve walking convenience; the upper end is rotatably connected to the right end of the support seat, and a telescopic member connected to the support seat is added to the walking bracket. Under the telescopic effect of the telescopic member, the support seat is pushed to rotate clockwise or counterclockwise around the rotation connection with the walking bracket, thereby increasing the adjustable range of the support seat and improving the applicable scope of the pipeline crossing device. Optionally, the telescopic member is a structure with a telescopic function, such as a telescopic screw or a telescopic cylinder or a telescopic oil cylinder, etc., which is not limited to the attached drawings.

[0093] Preferably, reference Figure 4 A cylindrical tug 221 is arranged above the support seat 22, and a through hole is arranged in the center of the cylindrical tug 221; a stinger rack roller 234 is arranged below the shell of the stinger rack 23, corresponding to the position of the through hole; the stinger rack roller 234 is slidably arranged in the through hole of the cylindrical tug 221.

[0094] In this embodiment, a cylindrical tug with a through hole in the center is added to the support seat, and a stinger roller is added under the stinger shell. Figure 4 The roller of the stinger frame slides left and right in the through hole of the cylindrical tugboat, so that the stinger frame can slide left and right with the supporting seat. The structure is simple and easy to implement.

[0095] More preferably, ear plates 222 are provided at both ends of the cylindrical tug, and the ear plates 222 are fixedly provided on the support seat 22, which can improve the structural strength of the cylindrical tug 221 and avoid structural deformation due to the heavy weight of the pipeline. More preferably, limiting ears 235 are provided at both ends of the stinger roller 234, and the limiting ears 325 are fixedly connected to the shell 231; the minimum width of the limiting ears at both ends is greater than the diameter of the through hole on the cylindrical tug; on the one hand, it plays a role in enhancing the structural strength of the stinger roller and avoiding structural deformation due to the heavy weight of the pipeline; on the other hand, it plays a role in limiting the sliding stroke of the stinger and the support plate to the left and right.

[0096] Preferably, reference Figure 4 The stinger 23 includes a shell 231 and a receiving chamber 232; the stinger 23 is slidably arranged on the support seat 22 through the shell 231. It is worth noting that the structure and shape of the shell 231 can be set arbitrarily, and the receiving chamber formed is not limited to a closed structure, as long as there is a position for placing the pipeline, it can be a receiving chamber.

[0097] More preferably, stinger rack rollers are provided on the inner side and / or the bottom of the shell 231 of the stinger rack 23.

[0098] In this embodiment, several preferred embodiments of the stinger 23 are provided, and the pipeline is carried by the accommodating cavity to further provide protection for the pipeline. More preferably, stinger rollers are added to the inner side or / and the bottom of the housing 231 of the stinger 23. When the mobile device moves forward and backward, the pipeline placed in the stinger and the inner wall of the stinger roll relative to each other through the stinger rollers, which greatly reduces the friction and avoids pipeline wear. It can be understood that the number, diameter and spacing of the stinger rollers can be arbitrarily set by those skilled in the art according to the length of the stinger and the diameter of the pipeline.

[0099] Specifically, refer to Figure 5 , the line crossing device includes: a support assembly 31, a guide assembly 32, a first roller assembly 33 and a second roller assembly 34;

[0100] The guide assembly 32 is arranged at both ends of the support assembly 31;

[0101] A first roller assembly 33 is horizontally arranged in the middle of the supporting assembly 31;

[0102] The second roller assembly 34 is vertically disposed on the side of the supporting assembly 31 .

[0103] In this embodiment, a line crossing device is provided. After being guided by the guide assembly at the front end of the support assembly, various lines can conveniently enter the line crossing device. On the one hand, the line is laid on the first roller assembly in the middle of the support assembly, so that during the movement of the trolley, the moving line can roll on the first roller assembly to greatly reduce the friction of the line and avoid line wear; on the other hand, the line head larger than the line is attached to the second roller assembly on the side of the support assembly, so that during the movement of the trolley, the line head larger than the line can also roll on the second roller assembly, further reducing the friction of the line head and avoiding line head wear; finally, the output is guided by the guide assembly at the end of the support device. Overall, the line crossing device in this embodiment can support and conveniently move various lines, reduce the convenience of the line and the line head passing on the mounting bracket without disassembly, so that the line and the line connector with a larger diameter than the line can be laid forward with various trolleys, improve the laying efficiency, reduce the wear of the line and the line head, improve the engineering quality, and reduce the labor intensity.

[0104] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed. The combination of its technical effects and technical features will not be repeated here, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A split TBM synchronous lining construction method, characterized in that: include: S10. After TBM excavation, prefabricated invert blocks are laid synchronously, and transport tracks are installed on the prefabricated invert blocks. Symmetrical switches are set on the transport tracks to realize the conversion of transport tracks. S20. After the prefabricated invert blocks and track laying are completed, the needle beam invert trolley follows the cast-in-place low side wall, which serves as the basis for the running track of the subsequent construction equipment; S30. After the construction of the low side wall is completed, the steel bar trolley equipment follows up to tie the second lining steel bars. After the second lining steel bars are tied, the steel bar trolley moves forward to the next construction location; S40. After the second lining reinforcement is tied, the second lining trolley follows up to pour the second lining concrete; S50: After the concrete is poured and solidified, the curing trolley follows to the same workstation to cure the concrete; Among them, the TBM synchronous lining construction area includes the low side wall construction area, the steel bar construction area, the side top arch construction area, and the secondary lining maintenance area. The low side wall construction area is equipped with at least 2 needle beam arch trolleys, the steel bar construction area is equipped with at least 2 steel bar trolleys, and the side top arch construction area is equipped with at least 2 secondary lining trolleys. The low side wall construction area, the steel bar construction area, and the side top arch construction area are all constructed using the skip-bin operation method.

2. The split TBM synchronous lining construction method according to claim 1 is characterized in that: Step S20 includes: After the prefabricated invert arch block and transport track are installed, the needle beam invert arch trolley moves forward to tie the steel bars of the short side wall. After the steel bars are tied, the template demoulding cylinder of the needle beam invert arch trolley is controlled to extend to put the short side wall template in place and support it firmly. The track-mounted concrete transport vehicle drives to that place to pour concrete for the short side wall. After the concrete solidifies, the support is removed and the template demoulding cylinder is controlled to retract to separate the short side wall template from the concrete. After the template is demoulded, the needle beam invert arch trolley moves forward to the next construction position. After the concrete strength of the short side wall reaches the requirement, steel supports are laid on its upper surface for the laying of equipment tracks to facilitate the passage of subsequent construction equipment.

3. The separated TBM synchronous lining construction method according to claim 1 is characterized in that: Step S30 includes: A steel bar lifting trolley and a steel bar installation trolley are used. The steel bar lifting trolley is used to quickly unload the steel bars from the transport vehicle and lift them onto the steel bar installation trolley. The secondary lining steel bars are uniformly processed outside the hole as required, transported to the site, and finally manually installed and tied on the steel bar installation trolley.

4. The separated TBM synchronous lining construction method according to claim 3 is characterized in that: The installation of the secondary lining steel bars is controlled by a steel bar positioning frame. According to the measured control points, the outer layer of annular positioning steel bars are first tied. After the positioning steel bars are connected with longitudinal bars, the longitudinal bars are used as the basis for the installation of other annular bars. After the outer layer is tied, the inner layer of steel bars are installed in the same way, and the inner and outer layers of steel bars are promptly connected with stirrups and spot welded by arc welding to enhance the overall rigidity.

5. The separated TBM synchronous lining construction method according to claim 1 is characterized in that: Step S40 includes: A pump truck and a secondary lining trolley are used in a one-to-one ratio. The pump truck is responsible for pumping concrete to the secondary lining trolley, and the secondary lining trolley sets up the mold and pours concrete. When pouring concrete, it is poured symmetrically from bottom to top, with both sides carried out simultaneously or alternately.

6. The method for construction of a separate TBM synchronous lining according to claim 1, characterized in that: In step S20, the needle beam arch trolley includes a needle beam part, a beam frame part and a cross plate part, wherein the beam frame part is a rectangular frame formed by connecting square tubes; after the needle beam part passes through the beam frame part, it is slidably arranged with the beam frame part; the beam frame part is a rectangular frame formed by connecting square tubes; the cross plate part is recoverably fixed to the bottom end of the beam frame part, and is extended along the length direction of the cross plate part; the needle beam part includes a needle beam, at least two groups of needle beam bases and at least two groups of needle beam transverse movement mechanisms, wherein the needle beam is a double-web box-type structure welded by a panel and supporting ribs; the needle beam bases are arranged on the bottom surfaces of the two end sides of the needle beam, and are connected to the needle beam through a needle beam transverse movement mechanism; one end of the needle beam transverse movement mechanism is slidably fixed on the top end surface of the needle beam base, extending along the transverse direction of the needle beam, and the other end arranged oppositely is fixed to the needle beam as a whole, and is arranged to move together.

7. The method for construction of a separate TBM synchronous lining according to claim 1, characterized in that: In step S30, the steel bar trolley includes a steel bar lifting trolley and a steel bar installation trolley arranged in front of the steel bar installation trolley, and the steel bar trolley is provided with a two-layer push-pull working platform.

8. The method for construction of a separate TBM synchronous lining according to claim 1, characterized in that: In step S40, the secondary lining trolley includes a portal assembly, a variable diameter telescopic assembly, a lining template assembly and an extension assembly; The lining formwork assembly comprises a plurality of arc-shaped formworks connected in sequence and detachably arranged on the periphery of the portal frame assembly; The variable diameter telescopic assembly is arranged between the portal assembly and the lining formwork assembly, and its telescopic movement drives the lining formwork assembly to increase or decrease its diameter; An extension assembly is used to be arranged at the notch of the lining formwork assembly when the diameter of the lining formwork assembly increases; The lining template components are arranged in two groups symmetrically along the central axis of the lining trolley; among the adjacent connected arc templates, at least one pair of arc templates is detachably connected; and the extension component is detachably arranged between the adjacent detachable arc templates.

9. The method for construction of a separate TBM synchronous lining according to claim 1, characterized in that: In steps S10 to S50, during the movement of the needle beam invert trolley, the steel bar trolley, the secondary lining trolley and the maintenance trolley, a pipeline crossing device is used to cross the pipeline, and a line crossing device is used to cross the line.

10. The method for construction of a separate TBM synchronous lining according to claim 9, characterized in that: The pipeline crossing device comprises: a traveling support, a support seat arranged above the traveling support and a stinger; The walking support is arranged on the lifting and lowering moving device and moves relative to the moving device in the vertical direction; The stinger rack is arranged above the support seat and slides left and right to carry the pipeline.

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