Three-dimensional reconstruction and extension method and equipment for existing road

Abstract

The invention provides a three-dimensional reconstruction and extension method and equipment for an existing road. The three-dimensional reconstruction and extension method comprises the steps that a movable temporary bridge is assembled, traffic is temporarily closed, and traffic guide and modification are conducted; constructing a lower structure of the bridge by utilizing an under-bridge space of the movable temporary bridge, and assembling a prefabricated main beam; traffic is temporarily closed, the movable temporary bridge moves forwards, a prefabricated main beam is erected on the constructed bridge lower structure, and the prefabricated main beam is connected with the movable temporary bridge; temporarily opening traffic; the steps are circulated until all the prefabricated girders are erected; traffic is temporarily closed, and expansion joints are constructed. According to the invention, a temporary traffic guide and change facility is combined with a permanent construction space release function, traffic zero interruption during construction is realized, the construction efficiency and quality are remarkably improved, the influence and potential safety hazards on existing traffic are effectively reduced, and the method is suitable for three-dimensional reconstruction and extension of highways, urban elevated reconstruction and emergency rescue engineering.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional reconstruction and expansion of existing roads, and particularly relates to a method and equipment for three-dimensional reconstruction and expansion of existing roads. Background Art

[0002] In the three-dimensional reconstruction and expansion project of existing roads, bridge erection is a core link, and its construction efficiency, traffic impact and safety are crucial. However, traditional construction methods often lead to extremely serious traffic interruptions. Conventional construction requires closing the road for up to several months, which not only causes serious traffic congestion but also brings huge losses to social and economic activities. At the same time, the construction efficiency is extremely low. The construction methods of on-site casting and segment-by-segment erection are time-consuming and require closing the traffic for several months. In addition, the potential safety hazards are extremely prominent. The construction area intersects with the vehicle traffic lanes, which is extremely likely to cause traffic accidents. The resource utilization efficiency is also low. The on-site construction has high energy consumption and serious material waste. Therefore, the traditional construction methods expose many significant drawbacks and are difficult to meet the needs of modern traffic development, urban construction and people's travel.

[0003] In view of the defects of traditional construction methods, the existing incremental launching technology solutions effectively shorten traffic interference. However, this method is limited by bridge type conditions (equal cross-section or constant curvature), has a relatively high material consumption (additional reinforcement and temporary prestress are required), has a complex temporary structure (such as a falsework beam and temporary piers), and the construction efficiency decreases with the increase of bridge length. For long-span (over 70 - 80m) or variable cross-section bridges, the economy significantly declines, and the applicability needs to be improved through optimized design and precise control. Especially in the construction of the bridge substructure, there are still deficiencies in aspects such as long-term traffic diversion, construction space conflict and safety. In addition, for multi-span long bridges, due to limited working surfaces and long incremental launching, the construction period is relatively long, which also greatly increases the interference and impact on the existing traffic. With the accelerating promotion of urbanization and urbanization processes, the demand for existing road reconstruction and expansion projects has increased significantly, and the market urgently needs a more efficient, safe and environmentally friendly comprehensive solution. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies of the existing technology and provide a method and equipment for three-dimensional reconstruction and expansion of existing roads, which combines temporary traffic diversion facilities with the function of releasing permanent construction space, realizes "zero" traffic interruption during construction, not only significantly improves construction efficiency and quality, but also effectively reduces the impact on existing traffic and potential safety hazards, and is applicable to the three-dimensional reconstruction and expansion of expressways, urban viaduct renovation and emergency rescue projects.

[0005] To solve the above technical problems, on the one hand, the present invention provides a method for three-dimensional reconstruction and expansion of existing roads, including:

[0006] Assemble a movable temporary bridge, temporarily close the traffic, and conduct traffic diversion; the movable temporary bridge includes a plurality of temporary bridge modules spliced in sequence.

[0007] Repeat the following processes until the erection of all precast main girders is completed:

[0008] Utilize the space under the movable temporary bridge to construct the lower bridge structure and assemble the precast main girders.

[0009] Temporarily close the traffic, move the movable temporary bridge to make room for the erection of the precast main girders, erect the precast main girders on the constructed lower bridge structure, and connect the precast main girders to the movable temporary bridge; all the temporary bridge modules of the movable temporary bridge and between the temporary bridge module and the precast main girder are connected by detachable connection structures.

[0010] Temporarily open the traffic.

[0011] After the erection of all precast main girders is completed, temporarily close the traffic and construct the expansion joint.

[0012] In some embodiments, the method for assembling the movable temporary bridge includes:

[0013] Move a plurality of mobile support mechanisms to the preset positions, lift the plurality of mobile support mechanisms to the corresponding designed heights, use a crane to lift a temporary beam segment onto the first mobile support mechanism, and the lifting height of the mobile support mechanism is such that the temporary beam segment does not affect the construction of the lower bridge structure.

[0014] The crane moves onto the temporary beam segment of the first mobile support mechanism, uses the crane to lift the temporary beam segment onto the next mobile support mechanism, and connects the temporary beam segments on the two mobile support mechanisms through a detachable connection structure.

[0015] The crane moves onto the temporary beam segment of the second mobile support mechanism, lifts the next temporary beam segment, and repeats the process until the splicing of all temporary beam segments is completed to form the movable temporary bridge.

[0016] In some embodiments, the method for assembling the movable temporary bridge includes:

[0017] For the case of building a permanent bridge on an existing road or widening an existing bridge on an existing road, the plurality of temporary bridge modules include an upper bridge section temporary module, a shed section temporary module, and a lower bridge section temporary module; move the plurality of mobile support mechanisms to both sides of the existing road, lift the plurality of mobile support mechanisms to the corresponding designed heights, lift and splice the upper bridge section temporary module, the shed section temporary module, and the lower bridge section temporary module in sequence to form the movable temporary bridge, and after the movable temporary bridge is moved to the bridge position of the existing road reconstruction and expansion, divert the ground traffic to the movable temporary bridge.

[0018] Furthermore, for the case of newly building a permanent bridge on an existing road or widening an existing bridge on an existing road, the erection method of precast main girders includes:

[0019] Remove the temporary module of the upper bridge section from the existing road, move the temporary module of the shed section and the temporary module of the lower bridge section forward, erect the first section or the first N sections of precast main girders on the constructed bridge substructure, fixedly connect two adjacent precast main girders, and connect the precast main girder and the temporary module of the shed section through a detachable connection structure;

[0020] After the subsequent bridge substructure is completed, move the temporary module of the shed section and the temporary module of the lower bridge section forward, erect the subsequent precast main girders on the constructed bridge substructure, and connect the precast main girder and the temporary module of the shed section through a detachable connection structure.

[0021] In some embodiments, the method of assembling a movable temporary bridge includes:

[0022] For the case of lengthening an existing bridge on an existing road, multiple temporary bridge modules include a temporary module of the shed section and a temporary module of the lower bridge section; move multiple movable support mechanisms to a preset position in front of the existing bridge, lift the multiple movable support mechanisms to the corresponding designed height, and use a crane to successively lift and splice the temporary module of the shed section and the temporary module of the lower bridge section on the existing bridge to form the movable temporary bridge, and divert the ground traffic at the corresponding position of the movable temporary bridge.

[0023] Furthermore, for the case of lengthening an existing bridge on an existing road, the erection method of precast main girders includes:

[0024] Move the temporary module of the shed section and the temporary module of the lower bridge section forward, erect the precast main girders on the constructed bridge substructure, fixedly connect the existing bridge and the precast main girders, and between two adjacent precast main girders, and connect the precast main girder and the temporary module of the shed section through a detachable connection structure.

[0025] In some embodiments, the erection of precast main girders adopts the whole-span and whole-width bridge erection technology: lift the assembled precast main girder onto a self-propelled modular transporter and transport it to one side of the erection position, the adaptive support system on the self-propelled modular transporter lifts the precast main girder to the erection height, and the self-propelled modular transporter moves horizontally to the bridge position and lowers the precast main girder to the bridge substructure.

[0026] On the other hand, the present invention provides a three-dimensional reconstruction and expansion device for an existing road, including:

[0027] Movable temporary bridge, the movable temporary bridge includes a plurality of temporary bridge modules spliced in sequence, the temporary bridge module includes a movable support mechanism, a temporary beam segment is arranged on the top of the movable support mechanism, and detachable connection structures are arranged at both ends of the temporary beam segment, and the detachable connection structures are used for connecting between two temporary bridge modules and between the temporary bridge module and the reconstructed and expanded bridge;

[0028] Full-span and full-width bridge erection system, the full-span and full-width bridge erection system includes a self-propelled modular transport vehicle, the self-propelled modular transport vehicle is used for transporting precast beam segments of the reconstructed and expanded bridge, and an adaptive support system is arranged on the self-propelled modular transport vehicle, and the adaptive support system is used for erecting the precast beam segments.

[0029] In some embodiments, the temporary bridge module includes a pressing mechanism, and the pressing mechanism is used for pressing and supporting the temporary beam segment.

[0030] In some embodiments, the detachable connection structure includes an insertion part and a receiving and locking part, the insertion part and the receiving and locking part are respectively arranged at both ends of the temporary bridge module, the insertion part is used for inserting into the receiving and locking part, and the receiving and locking part is used for fixing the insertion part.

[0031] Preferably, the insertion part includes a tenon head, a fixing hole is opened on the tenon head, the receiving and locking part includes a notch and a hydraulic locking pin, and an insertion hole is opened in the notch, so that after the tenon head is inserted into the notch, the hydraulic locking pin can be inserted into the fixing hole of the tenon head through the insertion hole.

[0032] The beneficial effects of the present invention are:

[0033] 1. The present invention combines the temporary traffic diversion facility with the function of releasing the permanent construction space. The traffic diversion adopts a "one-for-one" dynamic adjustment strategy, diverts the ground traffic to the movable temporary bridge, and realizes that the road traffic capacity during construction remains above 85% of the original design value. Release the space under the movable temporary bridge, and use the lower space of the movable temporary bridge for the construction of bridge substructures such as pile foundations, bridge piers and capping beams, so as to realize the synchronous advancement of on-site driving and permanent bridge construction. Only when erecting the precast main girder, it is necessary to temporarily close the traffic, so that the traffic is diverted to the movable temporary bridge, which does not depend on the existing road structure, greatly reduces the impact of the three-dimensional reconstruction and expansion of the existing road on the traffic, and also reduces the on-site construction noise and dust pollution.

[0034] 2. The movable temporary bridge of the present invention adopts an assembled structure type, and each module can be freely spliced and combined and has an independent moving function. It can be combined and extended to different spans such as hundreds of meters and kilometers according to needs, and can dynamically vacate the erection space for precast main girders. After one or more precast main girders are erected quickly and accurately, the precast main girders can be smoothly connected with the temporary bridge modules to form a temporary passage again, further reducing the impact on traffic.

[0035] 3. The present invention minimizes the impact on traffic by pre-assembling the movable temporary bridge on both sides of the existing road in advance, closing the traffic after the assembly is completed, and directly moving the movable temporary bridge to the bridge position for the reconstruction and expansion of the existing road for traffic diversion. For the safety and quality control work during the construction process, by real-time monitoring the equipment status and recording the key data such as stress, strain, displacement, etc. during the technical condition of the movable temporary bridge, the transportation and erection process of the precast beam of the permanent bridge, the quality and safety hazards existing can be discovered and handled in time.

[0036] 4. The movable support mechanism of the present invention can adopt a movable gantry crane, and the movable gantry crane can release the space under the movable temporary bridge to provide space for the construction of the substructure of the bridge such as pile foundations, bridge piers and caps.

[0037] 5. The present invention adopts the technology of erecting the whole span and whole width of the bridge with a self-propelled modular transport vehicle, effectively solving the problem of limited construction space, realizing the rapid and accurate positioning and girder dropping of the whole span and whole width of the bridge, and improving the construction quality.

[0038] 6. The present invention covers various scenarios such as the reconstruction and expansion of the three-dimensional bridge of the existing road, the widening of the newly built bridge, the lengthening of the existing bridge, and emergency rescue. The modular design supports the span expansion of hundreds of meters and has industry universality; at the same time, it fills the defects of the efficiency and adaptability of the traditional jacking technology and has high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the assembly process of the movable temporary bridge of the present invention;

[0040] Figure 2 It is a schematic diagram of the movable temporary bridge of the present invention after the assembly is completed;

[0041] Figure 3 It is a schematic diagram of the substructure of the newly built permanent bridge during the construction of the present invention;

[0042] Figure 4 It is a schematic diagram of the upper bridge section of the newly built permanent bridge during the construction of the present invention;

[0043] Figure 5 It is a schematic diagram of the erection of the precast main girder of the newly built permanent bridge of the present invention;

[0044] Figure 6 Front view of the erection of the precast main girder of the present invention;

[0045] Figure 7 Schematic structural diagram of the self-propelled modular transporter of the present invention;

[0046] Figure 8 Schematic structural diagram of the temporary bridge module of the present invention;

[0047] Figure 9 Schematic diagram of the assembly process of the movable temporary bridge during the lengthening of the existing bridge of the present invention;

[0048] Figure 10 Schematic diagram of the construction of the lower structure of the bridge during the lengthening of the existing bridge of the present invention

[0049] Figure 11 Schematic diagram of the erection of the precast main girder during the lengthening of the existing bridge of the present invention.

[0050] Reference numerals: movable temporary bridge 1; temporary bridge module 11; movable support mechanism 111; temporary beam segment 112; detachable connection structure 113; self-propelled modular transporter 2; adaptive support system 3; pile foundation 4; bridge pier 5; capping beam 6; precast main girder 7; bearing 8. Detailed implementation manners

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] The present invention provides a three-dimensional reconstruction and expansion device for existing roads, including a movable temporary bridge 1 and a whole-span and whole-width bridge erection system.

[0053] The movable temporary bridge 1 includes a plurality of temporary bridge modules 11 spliced in sequence. As Figure 8 shown, the temporary bridge module 11 includes a movable support mechanism 111. A temporary beam segment 112 is arranged on the top of the movable support mechanism 111. The temporary beam segment 112 and the movable support mechanism 111 can be connected through a temporary bearing. The temporary bearing can adopt existing rubber bearings 8, steel bearings 8, etc. Detachable connection structures 113 are arranged at both ends of the temporary beam segment 112. The detachable connection structures 113 are used for connecting between two temporary bridge modules 11 and between the temporary bridge module 11 and the reconstructed and expanded bridge.

[0054] Among them, the mobile support mechanism 111 can adopt a mobile gantry crane. The mobile gantry crane can release the space under the movable temporary bridge 1, providing space for the construction of the lower structure of the bridge such as the pile foundation 4, pier 5, and capping beam 6. The bottom of the mobile gantry crane is provided with universal wheels. The temporary beam segment 112 can adopt a detachable steel truss structure. The upper surface of the temporary beam segment 112 integrates an anti-slip paving layer, drainage, guardrails, traffic signal control, etc. The temporary beam segment 112 can also be composed of multiple sections spliced together.

[0055] It can be understood that since the movable temporary bridge 1 is composed of multiple temporary bridge modules 11, the number of temporary bridge modules 11 can be arbitrarily set as needed and can be extended to a span of up to one hundred meters. Detachable connection structures 113 are provided at both ends of the temporary bridge module 11, enabling seamless connection between temporary-permanent structures, temporary-temporary structures, and permanent-temporary structures, that is, the connection between two temporary bridge modules 11 and between the temporary bridge module 11 and the reconstructed and expanded bridge, with relatively flexible use. Most importantly, by moving the movable temporary bridge 1 forward, the erection space for the precast main beam 7 can be dynamically vacated.

[0056] In addition, a pressing device can be provided on both sides of the mobile support mechanism 111 according to requirements. The pressing device includes a hydraulic cylinder and a lower pressing plate. After the movable temporary bridge 1 is in place, the lower pressing plate can be pressed against the ground to improve the bearing capacity and stability of the movable temporary bridge 1.

[0057] As Figure 8 shown, the detachable connection structure 113 includes an insertion part and a receiving and locking part. The insertion part and the receiving and locking part are respectively provided at both ends of the temporary beam segment 112. The insertion part is used to insert into the receiving and locking part, and the receiving and locking part is used to fix the insertion part.

[0058] The insertion part includes a tenon head, and a fixing hole is opened on the tenon head. The receiving and locking part includes a notch and a hydraulic locking pin. The hydraulic locking pin includes a hydraulic cylinder and a locking pin. An insertion hole is opened in the notch. The length direction of the tenon head and the depth direction of the notch are both parallel to the length direction of the temporary segment. The fixing hole opened on the tenon head, the insertion hole opened in the notch, and the hydraulic locking pin are all perpendicular to the length direction of the temporary segment, so that after the tenon head is inserted into the notch, the hydraulic cylinder drives the locking pin to pass through the insertion hole of the notch and insert into the fixing hole of the tenon head, thereby connecting two adjacent temporary beam segments 112. A rubber sealing strip is provided at the connection of two adjacent temporary beam segments 112 to prevent water leakage. The contact surface between the tenon head and the notch can be coated with a wear-resistant coating.

[0059] As Figure 7 shown, the whole-span and whole-width bridge erection system includes a self-propelled modular transporter 2 (SPMT). The self-propelled modular transporter 2 is used to transport the precast beam segments of the reconstructed and expanded bridge. An adaptive support system 3 is provided on the self-propelled modular transporter 2, and the adaptive support system 3 is used for the erection of the precast beam segments.

[0060] Among them, the SPMT is prior art, and the adaptive support system 3 adopts the adaptive support system 3 described in the Chinese invention patent with the authorization announcement number CN111021268B. The integral-span and integral-width bridge erection system consists of multiple independent hydraulic drive modules. Each module is equipped with a hydraulic lifting, steering, and traveling system, and they cooperate through a central controller. Displacement sensors, pressure sensors, and inclinometers are integrated to monitor the module status in real time. The traveling path and hydraulic synchronization parameters can be preset in combination with the BIM model, and a preloaded load deformation compensation algorithm is preset based on finite element simulation; it supports 8 traveling modes including straight traveling, diagonal traveling, transverse traveling, figure-eight steering, and 360° central rotation, adapting to complex terrains. The self-propelled modular transporter 2 uses a high-strength alloy steel to strengthen the frame and wheel sets, with a maximum single-axis load of 48 tons, and the torsional stiffness of the whole machine is ≥ 1×10 6 N·m / rad, and is equipped with a wireless remote controller to achieve cluster integrated control; the transportation speed is limited to ≤ 5 m / min for straight traveling and ≤ 2 m / min for curves, ensuring millimeter-level beam dropping accuracy (longitudinal ±3 mm, transverse ±2 mm, elevation ±1 mm) and construction stability. Preferably, a four-axis SPMT is adopted to improve the flexibility and adaptability of transportation and erection.

[0061] The present invention provides a method for three-dimensional reconstruction and expansion of an existing road, including:

[0062] S1. Design of the movable temporary bridge 1 and traffic planning.

[0063] According to the requirements of the existing road reconstruction and expansion project, carry out the design of the movable temporary bridge 1 and traffic organization design. Based on the BIM technology, establish a three-dimensional parametric model, and dynamically adjust the splicing angle and slope of each temporary bridge module 11 of the movable temporary bridge 1 in combination with the existing road alignment (horizontal curve, longitudinal slope, cross slope) to ensure that the bridge deck slope ≤ 7%; use VISSIM traffic simulation software to optimize the diversion plan, formulate a "one-for-one" dynamic lane allocation strategy to ensure that the road traffic capacity during construction ≥ 85% of the original design value; design variable message signs, intelligent signal lights, and temporary markings to achieve dynamic lane switching and speed limit control (the speed limit of the diversion section ≤ 60 km / h).

[0064] S2. Assemble the movable temporary bridge 1, temporarily close the traffic, and carry out traffic diversion. Anti-collision barrels, water horses, and LED warning lights are set in the diversion area, and a mobile variable message sign is equipped to release construction information in real time, with a speed limit of 60 km / h; the movable temporary bridge 1 includes a plurality of temporarily connected temporary bridge modules 11;

[0065] In some embodiments, the method for assembling the movable temporary bridge 1 includes:

[0066] Move multiple movable support mechanisms 111 to preset positions, lift the multiple movable support mechanisms 111 to corresponding designed heights, use a crane to lift the temporary beam segment 112 onto the first movable support mechanism 111, and the lifting height of the movable support mechanism 111 is such that the temporary beam segment 112 does not affect the construction of the bridge substructure;

[0067] The crane moves onto the temporary beam segment 112 of the first movable support mechanism 111, uses the crane to lift the temporary beam segment 112 onto the next movable support mechanism 111, and connects the temporary beam segments 112 on the two movable support mechanisms 111 through a detachable connection structure 113;

[0068] The crane moves onto the temporary beam segment 112 of the second movable support mechanism 111, lifts the next temporary beam segment 112, and repeats the process until all the temporary beam segments 112 are spliced to form the movable temporary bridge 1. The temporary beam segment 112 integrates bridge deck paving, drainage, auxiliary facilities, traffic signal control, etc. After the assembly is completed, the total station should be used to detect the bridge deck alignment of the movable temporary bridge 1, with the longitudinal deviation ≤ 50 mm and the transverse offset ≤ 15 mm.

[0069] In some embodiments, the method for assembling the movable temporary bridge 1 includes:

[0070] As Figure 1 shown, for the case of building a new permanent bridge on an existing road or widening an existing bridge on an existing road, the multiple temporary bridge modules 11 include an upper bridge section temporary module with a slope, a shed section temporary module, and a lower bridge section temporary module with a slope. The slope can be adjusted according to the lifting height of the movable support mechanism 111, and the maximum slope should be ≤ 7%; move the multiple movable support mechanisms 111 to both sides of the existing road, lift the multiple movable support mechanisms 111 to the corresponding designed heights, lift and splice the upper bridge section temporary module, the shed section temporary module, and the lower bridge section temporary module in sequence to form the movable temporary bridge 1. As Figure 2 shown, after the movable temporary bridge 1 is moved to the bridge position for the reconstruction and expansion of the existing road, the ground traffic is diverted to the movable temporary bridge 1.

[0071] By pre-assembling the movable temporary bridge 1 on both sides of the existing road, closing the traffic after the assembly is completed, and directly moving the movable temporary bridge 1 to the bridge position for the reconstruction and expansion of the existing road, the traffic diversion can be carried out, minimizing the impact on traffic as much as possible.

[0072] For the case of lengthening an existing bridge on an existing road, the existing bridge can be directly used for the assembly of the temporary bridge module 11. The multiple temporary bridge modules 11 include a shed section temporary module and a lower bridge section temporary module; as Figure 9 、 10As shown, move multiple mobile support mechanisms 111 to a preset position in front of the existing bridge. Lift the multiple mobile support mechanisms 111 to the corresponding designed height. The crane sequentially hoists and splices the temporary modules of the shed section and the temporary modules of the lower bridge section on the existing bridge to form the movable temporary bridge 1, and divert the ground traffic at the corresponding position of the movable temporary bridge 1.

[0073] S3. Utilize the space under the movable temporary bridge 1 to construct the lower structure of the bridge and assemble the precast main girders 7; as Figure 3 shown in or 10, after diverting the ground traffic to the movable temporary bridge 1, since the mobile support mechanism 111 can adopt a mobile gantry crane, the space under the movable temporary bridge 1 is relatively ample, especially under the temporary module of the shed section. Therefore, the construction of the lower structure of the bridge such as the pile foundation 4, pier 5, and cap beam 6 can be directly started under the temporary module of the shed section, realizing the synchronous advancement of on-site traffic and the construction of the permanent bridge. In addition, the precast main girders 7 can be assembled simultaneously. More than 85% of the components of the precast main girders 7 are prefabricated in the factory, and the deck paving and ancillary facilities are integrated synchronously. Only wet joint pouring, expansion joint installation, and local adjustment are required on-site; preferably, the precast main girders 7 adopt steel box girders or steel-concrete composite girders as the main girders of the permanent bridge.

[0074] It should be noted that for the case of widening the existing bridge on the existing road, the construction methods of the newly built pile foundation 4 and the foundation of the existing bridge should be selected according to the structural conditions and geological conditions. When dealing with the foundation of the existing bridge, the traffic of the existing bridge needs to be temporarily closed.

[0075] S4. Temporarily close the traffic during the low peak period of vehicle flow, move the movable temporary bridge 1 forward, vacate the erection space for a whole span and whole width of the precast main girders 7, and erect the precast main girders 7 on the constructed lower structure of the bridge, and connect the precast main girders 7 with the movable temporary bridge 1; all between the multiple temporary bridge modules 11 of the movable temporary bridge 1 and between the temporary bridge module 11 and the precast main girders 7 are connected through detachable connection structures 113;

[0076] For the case of building a permanent bridge on the existing road or widening the existing bridge on the existing road, the erection method of the precast main girders 7 includes:

[0077] As Figure 4 、 5 shown, move the temporary module of the upper bridge section out of the existing road, move the temporary modules of the shed section and the lower bridge section forward, erect the first section or the first N sections of the precast main girders 7 on the constructed lower structure of the bridge, fixedly connect two adjacent precast main girders 7, and connect the precast main girders 7 with the temporary module of the shed section through a detachable connection structure 113;

[0078] After the subsequent bridge substructure is completed, the temporary modules of the shed section and the temporary modules of the lower bridge section are moved forward, and the subsequent precast main girders 7 are erected on the constructed bridge substructure, and the precast main girders 7 are connected to the temporary modules of the shed section through the detachable connection structure 113.

[0079] It should be noted that a tenon of the detachable connection structure 113 can be arranged at one end of the precast main girder 7. The tenon is welded to the embedded steel bars in the precast main girder 7 or temporarily fixed to the end face of the precast main girder 7 by bolts, so that the tenon of the precast main girder 7 can be inserted into the receiving and locking part of the temporary bridge module 11 and stably connected to the temporary bridge module 11.

[0080] The upper bridge section of the newly built permanent bridge can be erected during a single temporary traffic closure, or erected in multiple times. When erected in multiple times, only part of the temporary modules of the upper bridge section are removed from the existing road, so that the precast main girders 7 of the permanent bridge can be smoothly connected to the movable temporary bridge 1.

[0081] For the case of widening an existing bridge on an existing road, the transverse steel bars should be exposed by partially demolishing one or both sides of the widened existing bridge in advance. After each precast main girder 7 is erected, the precast main girder 7 can be spliced with the existing bridge, and the splicing method belongs to the existing mature technology.

[0082] Furthermore, for the case of lengthening an existing bridge on an existing road, the erection method of the precast main girder 7 includes:

[0083] As Figure 11 shown, the temporary modules of the shed section and the temporary modules of the lower bridge section are moved forward, the precast main girder 7 is erected on the constructed bridge substructure, the existing bridge and the precast main girder 7, and between adjacent two precast main girders 7 are fixedly connected, and the precast main girder 7 is connected to the temporary modules of the shed section through the detachable connection structure 113. The number of precast main girders 7 erected during a single temporary traffic closure is determined according to the specific design.

[0084] In some embodiments, the erection of the precast main girder 7 adopts the whole-span and whole-width bridge erection technology: such as Figure 6As shown in the figure, the assembled precast main girder 7 is hoisted onto the self-propelled modular transporter 2 and travels along the BIM-preset path (radius of curvature ≥ 200 m) to one side of the erection position. The adaptive support system 3 on the self-propelled modular transporter 2 lifts the precast main girder 7 to the erection height. The self-propelled modular transporter 2 traverses to the bridge position and lowers the precast main girder 7 onto the bearing 8. The precision control of beam dropping is as follows: longitudinally ±5 mm, transversely ±10 mm, and elevation ±3 mm. The laser target and total station are used for joint positioning. The adaptive support system 3 compensates for structural deformation in real time according to the load distribution parameters preset in the BIM model to ensure the balanced stress during the installation of the precast main girder 7. Preferably, combined with on-line monitoring of displacement and stress, the safety of transportation and erection is improved.

[0085] S5. Temporarily open the traffic. Since the bridge deck paving, railing and ancillary facilities on the precast main girder 7 have been completed in advance, and the precast main girder 7 is smoothly and stably connected to the movable temporary bridge 1 through the detachable connection structure 113, the traffic can be directly opened temporarily.

[0086] S6. Cycle through the construction of the bridge substructure, the assembly of the precast main girder 7, the movable temporary bridge 1 making room for erection, and the erection of the precast main girder 7 until all the precast main girders 7 are erected; that is, cycle through steps S3 to S5. After all the precast main girders 7 are erected, the movable temporary bridge 1 is synchronously removed from the road and disassembled and withdrawn.

[0087] S7. Temporarily close the traffic during the low peak period of vehicle flow and construct the expansion joint, and a quick-setting, fast-drying and high-strength expansion joint can be used.

[0088] S8. Open the traffic after the route connection is achieved.

[0089] On the basis of the wide application of the Chinese invention patent with the authorization announcement number of CN111021268B, the present invention innovatively integrates the modular movable bridge technology, the SPMT transportation system, the hydraulic synchronous control technology and the BIM collaborative management platform, and successfully breaks through the limitations of the traditional construction technology. By optimizing the construction space layout, the operation area is restricted within the existing road range, and the modular movable temporary bridge 1 is designed to reduce the occupation of the surrounding environment. At the same time, the SPMT special synchronous erection equipment is used to realize the efficient transportation and erection of the precast main girder 7, effectively solving the problem of limited construction space. In order to reduce the traffic impact, traffic diversion measures are implemented, and combined with the assembly and erection of the movable temporary bridge 1, the traffic interruption during construction is minimized. In addition, advanced construction technologies such as the integral span and integral width precast main girder 7 and BIM are introduced to reduce the occupation time of the ground lane, improve the construction efficiency, and reduce the safety risk of bridge construction. It is applicable to the three-dimensional reconstruction and expansion of expressways, the transformation of urban viaducts and emergency rescue projects, promoting the transformation of bridge engineering to industrialization and intelligentization, and promoting the existing road reconstruction and expansion projects to move towards low-carbon, high-efficiency and safety.

[0090] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A three-dimensional reconstruction and expansion method for existing roads, characterized in that, Including: Assembling a movable temporary bridge (1), temporarily closing the traffic and conducting traffic diversion; the movable temporary bridge (1) includes a plurality of temporary bridge modules (11) spliced in sequence; Repeat the following processes until the erection of all precast main girders (7) is completed: Utilize the space under the movable temporary bridge (1) to construct the lower bridge structure and assemble the precast main girders (7), Temporarily close the traffic, move the movable temporary bridge (1) to vacate the erection space for the precast main girders (7), erect the precast main girders (7) on the constructed lower bridge structure, and connect the precast main girders (7) to the movable temporary bridge (1); the plurality of temporary bridge modules (11) of the movable temporary bridge (1) and between the temporary bridge module (11) and the precast main girder (7) are all connected by a detachable connection structure (113), Temporarily open the traffic; After the erection of all precast main girders (7) is completed, temporarily close the traffic and construct the expansion joint.

2. The method for three-dimensional reconstruction and expansion of existing roads according to claim 1, characterized in that The method for assembling the movable temporary bridge (1) includes: Move a plurality of movable support mechanisms (111) to the preset positions, lift the plurality of movable support mechanisms (111) to the corresponding designed heights, use a crane to lift a temporary beam section (112) onto the first movable support mechanism (111), and the lifting height of the movable support mechanism (111) is such that the temporary beam section (112) does not affect the construction of the lower bridge structure; The crane moves onto the temporary beam section (112) of the first movable support mechanism (111), uses the crane to lift the temporary beam section (112) onto the next movable support mechanism (111), and connects the temporary beam sections (112) on the two movable support mechanisms (111) through a detachable connection structure (113); The crane moves onto the temporary beam section (112) of the second movable support mechanism (111) to lift the next temporary beam section (112), and repeat the process until the splicing of all temporary beam sections (112) is completed to form the movable temporary bridge (1).

3. The method for three-dimensional reconstruction and expansion of existing roads according to claim 2, wherein The method for assembling the movable temporary bridge (1) includes: For the case of building a permanent bridge on an existing road or widening an existing bridge on an existing road, the plurality of temporary bridge modules (11) include an upper bridge section temporary module, a shed section temporary module, and a lower bridge section temporary module; move a plurality of movable support mechanisms (111) to both sides of the existing road, lift the plurality of movable support mechanisms (111) to the corresponding designed heights, sequentially lift and assemble the upper bridge section temporary module, the shed section temporary module, and the lower bridge section temporary module to form the movable temporary bridge (1), and after the movable temporary bridge (1) is moved to the bridge position for the reconstruction and expansion of the existing road, divert the ground traffic to the movable temporary bridge (1).

4. The three-dimensional reconstruction and expansion method for existing roads according to claim 3, characterized in that, For the case of building a permanent bridge on an existing road or widening an existing bridge on an existing road, the erection method of the precast main girder (7) includes: Remove the temporary module of the upper bridge section from the existing road, move the temporary modules of the scaffolding section and the lower bridge section forward, erect the first or the first N precast main girders (7) on the constructed bridge substructure, fixedly connect two adjacent precast main girders (7), and connect the precast main girder (7) and the temporary module of the scaffolding section through a detachable connection structure (113). After the subsequent bridge substructure is completed, move the temporary modules of the scaffolding section and the lower bridge section forward, erect the subsequent precast main girders (7) on the constructed bridge substructure, and connect the precast main girder (7) and the temporary module of the scaffolding section through a detachable connection structure (113).

5. The three-dimensional reconstruction and expansion method for existing roads according to claim 2, wherein The method for assembling the movable temporary bridge (1) includes: For the case of lengthening an existing bridge on an existing road, multiple temporary bridge modules (11) include the temporary module of the scaffolding section and the temporary module of the lower bridge section; move multiple mobile support mechanisms (111) to a preset position in front of the existing bridge, lift the multiple mobile support mechanisms (111) to the corresponding designed height, and use a crane to successively lift and splice the temporary module of the scaffolding section and the temporary module of the lower bridge section on the existing bridge to form the movable temporary bridge (1), and divert the ground traffic at the corresponding position of the movable temporary bridge (1).

6. The three-dimensional reconstruction and expansion method for existing roads according to claim 5, characterized in that, For the case of lengthening an existing bridge on an existing road, the erection method of the precast main girder (7) includes: Move the temporary modules of the scaffolding section and the lower bridge section forward, erect the precast main girder (7) on the constructed bridge substructure, fixedly connect the existing bridge and the precast main girder (7), and between two adjacent precast main girders (7), and connect the precast main girder (7) and the temporary module of the scaffolding section through a detachable connection structure (113).

7. The method for three-dimensional reconstruction and expansion of existing roads according to any one of claims 1 to 6, characterized in that, The erection of the precast main girder (7) adopts the whole-span and whole-width bridge erection technology: lift the assembled precast main girder (7) onto the self-propelled modular transport vehicle (2) and transport it to one side of the erection position, the adaptive support system (3) on the self-propelled modular transport vehicle (2) lifts the precast main girder (7) to the erection height, and the self-propelled modular transport vehicle (2) traverses to the bridge position and lowers the precast main girder (7) to the bridge substructure.

8. An apparatus for implementing the three-dimensional reconstruction and expansion method for existing roads according to any one of claims 1 to 7, characterized in that, including: A movable temporary bridge (1), the movable temporary bridge (1) includes a plurality of temporarily connected bridge modules (11) connected in sequence, the temporary bridge module (11) includes a mobile support mechanism (111), a temporary beam section (112) is arranged at the top of the mobile support mechanism (111), detachable connection structures (113) are arranged at both ends of the temporary beam section (112), and the detachable connection structures (113) are used for connecting between two temporary bridge modules (11) and between the temporary bridge module (11) and the reconstructed and expanded bridge; A whole-span and whole-width bridge erection system, the whole-span and whole-width bridge erection system includes a self-propelled modular transport vehicle (2), the self-propelled modular transport vehicle (2) is used for transporting precast beam segments of the reconstructed and expanded bridge, and an adaptive support system (3) is arranged on the self-propelled modular transport vehicle (2), and the adaptive support system (3) is used for the erection of precast beam segments.

9. The device according to claim 8, characterized in that, The detachable connection structure (113) includes an insertion part and a receiving and locking part. The insertion part and the receiving and locking part are respectively arranged at both ends of the temporary bridge module (11). The insertion part is used for inserting into the receiving and locking part, and the receiving and locking part is used for fixing the insertion part.

10. The device according to claim 9, characterized in that, The insertion part includes a tenon, and a fixing hole is formed in the tenon. The receiving and locking part includes a notch and a hydraulic locking pin. An insertion hole is formed in the notch, so that after the tenon is inserted into the notch, the hydraulic locking pin can be inserted into the fixing hole of the tenon through the insertion hole.

Images