Double-leaf vertical rotating opening bridge and construction method

Abstract

The application discloses a double-leaf vertical rotating opening bridge and a construction method, the double-leaf vertical rotating opening bridge comprising two single-bridge bodies which are symmetrically arranged, each single-bridge body comprising a pier, a bearing seat, a hydraulic oil cylinder, a middle locking device and a bridge body steel structure, and the bridge body steel structure being spliced by a counterweight section, a bearing section and a cantilever section. The bridge body steel structure is spliced by the counterweight section, the bearing section and the cantilever section, the counterweight section, the bearing section and the cantilever section are installed in sections when the bridge body steel structure is installed, the smooth construction of the opening bridge can be ensured, and the influence on the waterway traffic can be reduced to the maximum extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of open bridge, in particular to a double-leaf vertical rotation type open bridge and a construction method. BACKGROUND

[0002] The open bridge is an old bridge type. When the land transportation is not very busy and the ships sail on the river, the fixed bridge cannot be built above the navigation clearance, so the open bridge needs to be built to solve the water and land transportation. There are many types of open bridges. One is a horizontal rotation type open bridge. Two holes of the bridge are connected together. The machine is installed on the bridge pier between the two holes. The two holes of the bridge rotate ninety degrees around the bridge pier on the water surface to be perpendicular to the original position of the bridge to leave two hole channels for the ships to pass through without any obstruction. One is a lifting type open bridge. The machine is installed on the tower frame on the two side piers of the one hole bridge to make the one hole bridge be able to be lifted between the tower frames like an elevator. When the bridge hole is lifted, the ships can pass through below. One is a pushing type open bridge. The machine is used to drag the one hole bridge along the horizontal surface like a drawer to leave the river channel for the ships to sail. One is a vertical rotation type open bridge. The one hole bridge is divided into single leaf or double leaf. Each leaf is centered on the bridge pier support. The machine is used to rotate to make one end of the leaf be in the air and gradually be lifted to be high from the water surface. In this way, the middle channel is left for the ships to sail.

[0003] The vertical rotation type open bridge is convenient to open. When it is opened, the column is naturally formed, which is beneficial to the safety protection of the passing vehicles. However, due to the limitation of the balance weight, the span of the opening hole beam is larger than that of the other open bridges. The beam structure is large and complex, which brings great difficulty to the construction of the open bridge. The construction will have a great impact on the navigation. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a double-leaf vertical rotation type open bridge and a construction method.

[0005] The technical scheme of the present application is as follows:

[0006] In a first aspect, the present application provides a double-leaf vertical rotation type open bridge, which comprises two symmetrically arranged single-leaf bridge bodies. The single-leaf bridge body comprises a bridge pier, a bearing seat, a hydraulic oil cylinder, a middle locking device and a bridge body steel structure. The bearing seat and the hydraulic oil cylinder are arranged between the bridge body steel structure and the bridge pier.

[0007] The bridge body steel structure is spliced by a counterweight section, a bearing section and a cantilever section. The bearing section is rotationally connected with the bridge pier through the bearing seat. The movable end of the hydraulic oil cylinder is fixed with the bearing section. The fixed end of the hydraulic oil cylinder is fixed with the bridge pier. The hydraulic oil cylinder drives the bridge body steel structure to rotate along the bearing seat. The middle locking device is arranged at the front end of the cantilever section.

[0008] According to the application of the above scheme, the counterweight section comprises a first section, the bearing section comprises a second section, the cantilever section comprises a third section and a fourth section, and the first section, the second section, the third section and the fourth section are sequentially spliced together.

[0009] According to the application of the above scheme, the counterweight section, the bearing section and the cantilever section each comprise a plurality of main longitudinal beams arranged at intervals, a plurality of main transverse beams arranged at intervals are arranged between adjacent two main longitudinal beams, a plurality of secondary longitudinal beams arranged at intervals are arranged at the top between adjacent two main transverse beams, a plurality of secondary transverse beams arranged at intervals are arranged between adjacent two secondary longitudinal beams, and horizontal diagonal braces are arranged at the bottom of the main longitudinal beams between adjacent two main transverse beams.

[0010] Further, a cavity is formed between the plurality of horizontal diagonal braces, the plurality of secondary longitudinal beams and the plurality of secondary transverse beams, a maintenance passage is arranged in the cavity, and a hole through which a person can pass is arranged on the main transverse beam corresponding to the maintenance passage.

[0011] Further, a counterweight box is arranged between the ends of adjacent two main longitudinal beams of the counterweight section, a bearing seat and a hydraulic oil cylinder are arranged between each main longitudinal beam of the bearing section and the pier, each main longitudinal beam of the bearing section is connected with the corresponding bearing seat through a rotating shaft assembly, and each main longitudinal beam of the bearing section is connected with the movable end of the corresponding hydraulic oil cylinder through an oil cylinder upper support.

[0012] Further, a front support upper support is arranged at the bottom of each main longitudinal beam of the bearing section, the oil cylinder upper support is located between the front support upper support and the rotating shaft assembly, a plurality of front support lower supports matched with the front support upper supports are arranged at the top of the front end of the pier, and each front support upper support is in contact with the corresponding front support lower support when the single-side bridge body is in a closed state.

[0013] According to the application of the above scheme, the pier comprises a main pier pile cap and a main pier box chamber arranged on the main pier pile cap, a bearing seat steel support and an oil cylinder lower support are arranged in the main pier box chamber, the bearing seat is fixed at the top of the bearing seat steel support through a bearing seat cross beam, and the fixed end of the hydraulic oil cylinder is connected with the oil cylinder lower support.

[0014] Furthermore, fixed bridge plates are provided on the tops of the shear walls on both sides of the main pier box chamber, and an approach bridge is provided at the rear end of the main pier box chamber. The counterweight section is located below the fixed bridge plate, and the approach bridge is flush with the fixed bridge plate. The tops of the bearing section and the cantilever section are flush, and the tops of the bearing section and the cantilever section are higher than the top of the counterweight section. Bridge panels are provided on the tops of the bearing section and the cantilever section. When the single-sided bridge body is in a closed state, the bridge panel is flush with the fixed bridge plate.

[0015] In a second aspect, the present invention provides a construction method for a double-leaf vertical rotating bascule bridge, comprising:

[0016] Step S1: Installation of the first section of the crane rail platform and the lower crane rail platform bracket of the North Bridge;

[0017] Step S2: Installation of the north bridge bearing seat and hydraulic cylinder;

[0018] Step S3: Installation of the crane rail platform on the north bridge;

[0019] Step S4: installing the north bridge bearing section, counterweight section and cantilever section;

[0020] Step S5: paving the north bridge deck and debugging the north bridge single-side bridge body;

[0021] Step S6: Installation of the crane track platform bracket and the first section of the crane track platform at the lower part of the South Bridge;

[0022] Step S7: installing the south bridge bearing seat and the hydraulic cylinder;

[0023] Step S8: Installation of the crane rail platform on the south bridge;

[0024] Step S9: installing the south bridge bearing section, counterweight section and cantilever section;

[0025] Step S10: paving the south bridge deck and debugging the south bridge single-side bridge body;

[0026] Step S11: Joint debugging of the north and south bridges and installation of the central locking device.

[0027] According to the present invention of the above scheme, step S5 specifically includes:

[0028] Step S51: dismantling the crane rail platform on the north bridge;

[0029] Step S52: dismantling the crane track platform support at the lower part of the north bridge;

[0030] Step S53: paving the north bridge deck concrete;

[0031] Step S54: debugging of the single-side bridge body of the north bridge.

[0032] According to the above scheme, the step S10 specifically comprises:

[0033] Step S101: dismantling of the upper crane rail platform of the south bridge;

[0034] Step S102: dismantling of the lower crane rail platform support of the south bridge;

[0035] Step S103: paving of the south bridge deck concrete;

[0036] Step S104: debugging of the single-side bridge body of the south bridge.

[0037] According to the above scheme, the present application has the beneficial effects that:

[0038] 1. The bridge body steel structure of the present application is composed of a counterweight section, a bearing section and a cantilever section, and the counterweight section, the bearing section and the cantilever section are installed in sections, which can ensure the smooth construction of the open bridge and minimize the impact on the waterway traffic;

[0039] 2. The present application adopts the method of independent construction of the north and south bridges, and after the installation and debugging of the single-side bridge body are completed, the bridge body is opened for the installation of the other half of the bridge body, which reduces the impact on the waterway traffic, and according to the time characteristics of the passage of large ships, the sailing time period is mastered and controlled for the joint debugging of the whole bridge;

[0040] 3. The present application reduces the weight and size of the single hoisting component by erecting a crane rail steel platform on the main pier box of the open bridge and using a crawler crane cantilever assembly construction method, without the need for large special equipment, the main longitudinal beam butt joint and the secondary beam installation adopt bolt connection, which can reduce the installation difficulty and shorten the construction period, and maximally reduce the impact on the waterway traffic, achieving good economic and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a plan view of the present application;

[0042] Figure 2 is a longitudinal sectional view of the present application;

[0043] Figure 3 is a longitudinal sectional view of the single-side bridge body of the present application;

[0044] Figure 4 is a plan view of the bridge body steel structure of the present application;

[0045] Figure 5 is a connection diagram of the bearing section, the bearing seat and the hydraulic oil cylinder of the present application;

[0046] Figure 6The connection diagram of the cantilever segment and the middle locking device of the application;

[0047] Figure 7 The construction flow chart of the application;

[0048] Figure 8 The Figure 7 The specific construction flow chart of step S5;

[0049] Figure 9 The Figure 7 The specific construction flow chart of step S10.

[0050] In the drawings,

[0051] 1, bridge pier; 11, front support lower support; 12, main pier pile cap; 13, main pier box chamber; 14, bearing seat steel support; 15, oil cylinder lower support; 16, bearing seat cross beam; 17, fixed bridge plate; 18, approach bridge;

[0052] 2, bearing seat;

[0053] 3, hydraulic oil cylinder;

[0054] 4, middle locking device; 41, bolt lock rod; 42, bolt receiving seat; 43, hydraulic drag rod;

[0055] 5, bridge body steel structure; 51, counterweight segment; 511, counterweight box; 52, bearing segment; 521, rotating shaft assembly; 522, oil cylinder upper support; 523, front support upper support; 524, bridge deck slab; 53, cantilever segment; 54, main longitudinal beam; 55, main cross beam; 56, secondary longitudinal beam; 57, secondary cross beam; 58, horizontal diagonal brace; 59, sidewalk. DETAILED DESCRIPTION

[0056] In order to make the technical problems, technical solutions and beneficial effects of the application more clear and obvious, the application will be further described in detail below in combination with the drawings and examples.

[0057] It should be noted that the terms "set", "connect", "fixed" and the like should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium; they can be internal connections between two elements or interactions between two elements, unless otherwise clearly defined. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside" and the like are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. "Multiple" means two or more, unless otherwise clearly defined. The terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units that are not listed, or may optionally also include other steps or units that are inherent to these processes, methods, products or devices.

[0058] See also Figures 1 to 3 This embodiment provides a double-leaf vertical rotating opening bridge, including two symmetrically arranged single-sided bridge bodies, each of which includes a pier 1, a bearing seat 2, a hydraulic cylinder 3, a central locking device 4 and a bridge body steel structure 5. The bearing seat 2 and the hydraulic cylinder 3 are arranged between the bridge body steel structure 5 and the pier 1. The bridge body steel structure 5 is spliced ​​together by a counterweight section 51, a bearing section 52 and a cantilever section 53. The bearing section 52 is rotatably connected to the pier 1 through the bearing seat 2. The movable end of the hydraulic cylinder 3 is fixed to the bearing section 52, and the fixed end of the hydraulic cylinder 3 is fixed to the pier 1. The hydraulic cylinder 3 drives the bridge body steel structure 5 to rotate along the bearing seat 2 to realize the opening and closing of the single-sided bridge body. The opening angle of the single-sided bridge body is 75°. The central locking device 4 is arranged at the front end of the cantilever section 53. The central locking device 4 is used to center and lock the two single-sided bridge bodies. The bridge steel structure 5 of the present invention is composed of a counterweight section 51, a bearing section 52 and a cantilever section 53. When the bridge steel structure 5 is installed, the counterweight section 51, the bearing section 52 and the cantilever section 53 are installed in sections, which can reduce the lifting weight and volume of a single component, ensure the smooth construction of the opening bridge, and minimize the impact on waterway traffic.

[0059] See also Figure 4In the embodiment, the counterweight section 51 comprises a first section, the bearing section 52 comprises a second section, the cantilever section 53 comprises a third section and a fourth section, and the first section, the second section, the third section and the fourth section are sequentially spliced together by bolt connection to form the bridge steel structure 5. The counterweight section 51, the bearing section 52 and the cantilever section 53 each comprise three main longitudinal beams 54 (two side longitudinal beams and one middle longitudinal beam) which are arranged at intervals and have an I-shaped cross section. A plurality of main transverse beams 55 which are arranged at intervals and have an I-shaped cross section are arranged between the two adjacent main longitudinal beams 54. A plurality of secondary longitudinal beams 56 which are arranged at intervals are arranged at the top between the two adjacent main transverse beams 55. A plurality of secondary transverse beams 57 which are arranged at intervals are arranged between the two adjacent secondary longitudinal beams 56. Horizontal diagonal braces 58 are arranged at the bottom of the main longitudinal beams 54 between the two adjacent main transverse beams 55. The counterweight section 51, the bearing section 52 and the cantilever section 53 form the stable bridge steel structure 5 through the main longitudinal beams 54, the main transverse beams 55, the secondary longitudinal beams 56, the secondary transverse beams 57 and the horizontal diagonal braces 58. A cavity is formed between the secondary longitudinal beams 56, the secondary transverse beams 57 and the horizontal diagonal braces 58, and a passageway for maintenance can be arranged in the cavity. Holes for people to walk through are arranged on the main transverse beams 55 corresponding to the passageway for maintenance, so as to facilitate the later enclosure and management of the bridge middle locking device 4. Meanwhile, the main longitudinal beams 54 of the bridge steel structure 5 are made and installed in sections, so as to facilitate the transportation and on-site installation of the main longitudinal beams 54.

[0060] Sidewalks 59 are arranged on both sides of the side longitudinal beams, and the sidewalks 59 can be used for pedestrians to walk across the bridge in the closed state of the movable bridge.

[0061] A counterweight box 511 is arranged between the ends of the two adjacent main longitudinal beams 54 of the counterweight section 51, and the counterweight box 511 is used to adjust the gravity center position of the single-side bridge body, so that the lifting force of the hydraulic cylinder is greatly reduced in the opening process of the single-side bridge body. A bearing seat 2 and a hydraulic cylinder 3 are arranged between each main longitudinal beam 54 of the bearing section 52 and the pier 1. Each main longitudinal beam 54 of the bearing section 52 is connected with the corresponding bearing seat 2 through a rotating shaft assembly 521, and each main longitudinal beam 54 of the bearing section 52 is connected with the movable end of the corresponding hydraulic cylinder 3 through an upper oil cylinder support 522. By arranging a bearing seat 2 and a hydraulic cylinder 3 at the bottom of each main longitudinal beam 54 of the bearing section 52, if one of the hydraulic cylinders 3 is damaged, the remaining hydraulic cylinders 3 can also continue to open and close the single-side bridge body, so as to ensure that the single-side bridge body can be normally opened and closed.

[0062] Please refer to Figure 3 , Figure 5The bottom of each main longitudinal beam 54 of the bearing section 52 is provided with a front support upper support 523, and the oil cylinder upper support 522 is located between the front support upper support 523 and the rotating shaft assembly 521, serving as an upper supporting point for the hydraulic oil cylinder 3 to lift the main longitudinal beam 54 to open. The front end top of the pier 1 is provided with a plurality of front support lower supports 11 matched with the front support upper supports 523, and when the single-sided bridge body is in the closed state, each front support upper support 523 is in contact with the corresponding front support lower support 11, and the front support upper support 523 and the front support lower support 11 play a role in supporting the single-sided bridge body.

[0063] Please refer to Figure 1 、 Figure 3 、 Figure 5 In this embodiment, the pier 1 includes a main pier cap 12 and a main pier box chamber 13 arranged on the main pier cap 12, the main pier box chamber 13 is provided with a bearing seat steel support 14 and an oil cylinder lower support 15, the bearing seat 2 is fixed on the top of the bearing seat steel support 14 through a bearing seat cross beam 16, the fixed end of the hydraulic oil cylinder 3 is connected with the oil cylinder lower support 15, the front support lower support 11 is arranged on the top of the shear wall at the front end of the main pier box chamber 13, and the oil cylinder lower support 15 is located between the bearing seat steel support 14 and the front support lower support 11, serving as a lower supporting point for the hydraulic oil cylinder 3 to lift the main longitudinal beam 54 to open.

[0064] Please refer to Figure 3 The top of the shear wall on both sides of the main pier box chamber 13 is provided with a fixed bridge plate 17, the counterweight section 51 is located directly below the fixed bridge plate 17, the rear end of the main pier box chamber 13 is provided with an approach bridge 18, the approach bridge 18 is flush with the fixed bridge plate 17, the top of the bearing section 52 and the cantilever section 53 is flush, and the top of the bearing section 52 and the cantilever section 53 is higher than the top of the counterweight section 51, the top of the bearing section 52 and the cantilever section 53 is provided with a bridge deck 524, and the fixed bridge plate 17 is used for connecting the approach bridge 18 and the bridge deck 524, and when the single-sided bridge body is in the closed state, the bridge deck 524 is flush with the fixed bridge plate 17.

[0065] Please refer to Figure 6 In this embodiment, the central locking device 4 includes a bolt lock rod 41 and a bolt receiving seat 42, the bolt lock rod 41 is installed at the front end of one of the single-sided bridge bodies, and the bolt receiving seat 42 is installed at the front end of the other single-sided bridge body, when the open bridge is closed, the bolt lock rod 41 is inserted into the bolt receiving seat 42 through a hydraulic drag rod 43, so as to lock the two single-sided bridge bodies.

[0066] On the other hand, please refer to Figure 7 The present application provides a construction method of the above-mentioned double-leaf vertical rotating open bridge, which comprises the following steps:

[0067] Step S1: installation of the north bridge first section crane rail platform and the lower crane rail platform support.

[0068] In the present embodiment, the operation frame is erected on the north bridge main pier towards the indoor, the installation of the lower crane rail platform support of the north bridge is carried out, the steel pipe column foundation of the operation frame must be accurately positioned and installed, and the verticality must be accurate, and the bridge body steel structure is avoided, so as to avoid the influence of the lower crane rail platform support on the installation of the bridge body steel structure. At the same time, due to the large size of the counterweight box module, the bearing segment beam and the internal maintenance steel platform and other components, they must be hoisted and stacked on the lower crane rail platform support before the upper crane rail platform is installed, and the temporary support and beam of the counterweight box module are designed and installed at the corresponding position of the lower crane rail platform support.

[0069] The first section crane rail platform of the north bridge includes the first section of the steel platform of the Bailey beam erected on the prestressed concrete approach bridge deck and the triangular slope frame, the triangular slope frame is welded by UB305*305*118kg / m type steel, the slope angle is 10°, and the surface is treated with anti-skid treatment. Because the plane of the triangular slope frame and the corner angle of the first section of the Bailey beam steel platform are large, the large arm will have a large difference when the crawler crane changes the platform at the corner. In order to ensure the smooth walking of the crawler crane on the platform, the crawler crane is used for empty walking with no counterweight when going up the platform, and the crawler crane is used for empty walking with counterweight when going down the platform, and the first section of the Bailey beam steel platform and the lower part of the triangular slope frame are welded and fixed with the anchor points of the embedded parts of the concrete bridge deck of the approach bridge through small steel fixing parts. At the same time, due to the large load on the bridge deck under the walking and hoisting conditions of the crawler crane, the local concrete structure needs to be strengthened and reinforced according to the results of structural calculation review during the construction of the approach bridge structure.

[0070] Step S2: installation of the bearing seat and the hydraulic oil cylinder of the north bridge.

[0071] In the present embodiment, the bearing seat, the hydraulic oil cylinder and the steel support thereof and other components are transported to the first section of the Bailey beam steel platform through the approach bridge for installation. Among them, the bearing seat and the steel support thereof after installation must be precisely calibrated and the bolts must be tightened; the hydraulic cylinder is temporarily fixed and then the surface is covered and protected.

[0072] Step S3: installation of the upper crane rail platform of the north bridge.

[0073] In the present embodiment, the upper crane rail platform of the north bridge includes the Bailey beam steel platform, the Bailey beam steel platform is installed on the lower crane rail platform support, and the Bailey beam steel platform is higher than the elevation of the open bridge deck, so as to avoid the influence of the Bailey beam steel platform on the installation of the bridge body steel structure. Among them, the counterweight box module and the main beam of the bearing segment and other components are lowered to the beam of the lower crane rail platform support, and then pass through the Bailey beam steel platform.

[0074] Step S4: installation of the bearing segment, the counterweight segment and the cantilever segment of the north bridge.

[0075] In the present embodiment, step S4 specifically includes the following steps:

[0076] Step S41: installation of the north bridge bearing section. Specifically,

[0077] 1) The north bridge bearing section includes a second segment. The middle longitudinal beam of the second segment is hoisted at the first preset station of the crane on the first segment crane track platform. The front support seat temporary support and the jack are installed. The front end of the middle longitudinal beam is placed on the upper surface of the front support seat temporary support. The rear end of the middle longitudinal beam is slowly adjusted in position. The center line of the middle longitudinal beam is kept coincident with the center of the trunnion support. The middle longitudinal beam is safely and undamaged placed in the bearing seat which has been precisely calibrated. The jack is adjusted. The load cell is installed between the front support lower seat and the front support upper seat. After the axis elevation of the middle longitudinal beam is reviewed and found to be correct, the front support seat temporary support is removed.

[0078] 2) The main cross beam is hoisted at the second preset station of the crane on the first segment crane track platform. The main cross beam is lowered from the side of the first segment crane track platform. One end of the main cross beam is translated to the middle longitudinal beam. The side longitudinal beam is hoisted and lowered. After the elevation axis is adjusted, the main cross beam is connected and fixed.

[0079] 3) The other side main cross beam and the side longitudinal beam are installed at the second preset station of the crane on the first segment crane track platform by using the same method as described above. After calibration, they are connected and fixed to form the main frame of the second segment.

[0080] Step S42: installation of the north bridge counterweight section. Specifically, the north bridge counterweight section includes a first segment. The rear end of the main longitudinal beam of the first segment is erected on the main longitudinal beam temporary support. The front end of the main longitudinal beam is bolted to the main longitudinal beam of the second segment. The counterweight box module is connected and fixed to the main longitudinal beam and the cross beam at the rear end of the first segment to form a counterweight box. The counterweight box temporary support is installed at the bottom of the counterweight box.

[0081] Step S43: installation of the north bridge cantilever section. Specifically, the north bridge cantilever section includes a third segment and a fourth segment. The front end of the main longitudinal beam of the third segment exceeds the channel. Therefore, the channel is limited during the hoisting and installation of the components of the third segment and the fourth segment. Warning buoys are placed. After the components of the third segment and the fourth segment are installed and fixed, warning lights are installed at the ends and the bottom of the components for night lighting. After the installation of the third segment is completed, the first pouring of the counterweight concrete is required. The pouring amount of the counterweight concrete is determined after gravity center calculation. The data of the load cell before and after pouring are reviewed for deviation from the theoretical value. The next component installation quantity is analyzed and adjusted. The intermediate separation belt, the pedestrian walkway, and the internal maintenance platform, etc. are installed synchronously with the main structure.

[0082] Step S5: paving of the north bridge deck and debugging of the single-side north bridge body.

[0083] Please refer to Figure 8 In this embodiment, step S5 specifically includes:

[0084] Step S51: Demolition of the upper crane rail platform of the north bridge. Specifically, after the north bridge body structure is installed, the upper Bailey beam steel platform is demolished, and the first crane rail platform is demolished. The Bailey beam steel platform is transferred to the south bank. After the first crane rail platform is demolished, the second weight concrete pouring is performed. The weight concrete pouring amount is determined after the center of gravity calculation, and the deviation value between the weighing sensor data and the theory before and after pouring is reviewed.

[0085] Step S52: Demolition of the lower crane rail platform support of the north bridge. Specifically, after the second weight concrete pouring, the lower crane rail platform support is demolished.

[0086] Step S53: Paving of the north bridge deck concrete. Specifically, after the lower crane rail platform support is demolished, the north bridge deck concrete paving construction is performed. When pouring the concrete, the bridge deck two-way lane is symmetrically poured from the midspan to the bearing seat direction, with 1m reserved at the bridge end for elevation adjustment during the south-north bridge closure. After pouring is completed, maintenance is performed. Finally, the third concrete weight pouring is performed according to the center of gravity calculation result, and the hydraulic cylinder and hydraulic control system installation are improved, and the temporary support of the weight box is removed.

[0087] Step S54: Debugging of the single-side bridge body of the north bridge. Specifically, after the bridge deck concrete reaches the design strength requirement, the debugging of the single-side bridge body of the north bridge is started.

[0088] Step S6: Installation of the lower crane rail platform support and the first crane rail platform of the south bridge.

[0089] In this embodiment, the indoor operation frame is erected on the south bridge main pier, and the installation of the lower crane rail platform support of the south bridge is performed. After the lower crane rail platform support is installed, the north bridge Bailey beam steel platform is transferred to the south bank, and the installation of the first crane rail platform of the south bridge is performed.

[0090] Step S7: Installation of the bearing seat and hydraulic cylinder of the south bridge.

[0091] Step S8: Installation of the upper crane rail platform of the south bridge.

[0092] Step S9: Installation of the bearing section, weight section and cantilever section of the south bridge.

[0093] In this embodiment, considering the channel navigation, the installation of the south bridge is suspended before the third section is installed. After the debugging of the single-side bridge body of the bridge is completed, the third section and the fourth section of the south bridge can be installed. The north bridge remains in the daily openable state, and the single-bridge opening and closing are performed according to the needs of the channel vessel traffic until the debugging of the single-side bridge body of the south bridge is completed.

[0094] Step S10: Paving of the south bridge deck and debugging of the single-side bridge body of the south bridge.

[0095] Please refer toFigure 9 In the embodiment, step S10 specifically comprises:

[0096] Step S101: dismantling of the upper part of the south bridge crane rail platform.

[0097] Step S102: dismantling of the lower part of the south bridge crane rail platform support.

[0098] Step S103: paving of the south bridge deck concrete.

[0099] Step S104: debugging of the single side of the south bridge body.

[0100] Step S11: joint debugging of the south and north bridges and installation of the middle locking device.

[0101] In the embodiment, according to the time characteristics of the large ship passing, the navigation time period is mastered and controlled, and the joint debugging of the south and north bridges is performed. During the joint debugging of the south and north bridges, the middle locking device is installed. Four groups of middle locking devices are arranged on the whole bridge. When the movable bridge is opened and the fixed bridge is closed, the locking rods of the single side of the south and north bridges are inserted into the receiving seats through the hydraulic push rod. During each stage of the installation of the south and north bridge structures, the axis deviation of the bridge body can be measured and adjusted. After the completion of the installation of the structures, the axis deviation is 2mm through re-measurement, which reaches a high accuracy. However, due to the influence of factors such as bridge span stress deformation, temperature difference, processing error and the like, there is uncertainty in the elevation centering of the single side of the south and north bridges after the installation of the movable bridge. The accurate closure of the bridge body is ensured through two steps of elevation difference coarse adjustment and fine adjustment:

[0102] (1) The elevation of the front support lower support is accurately adjusted through the adjustment of the pad, and the front support lower support is tightly fitted with the front support upper support, the deviation of the middle span is adjusted to 10mm, then the installation of the middle finger expansion joint and the pouring of the reserved bridge deck adjustment section concrete are performed, and the distribution of the movable counterweight box cast iron movable counterweight block is completed.

[0103] (2) The locking rod part is previously fixed with the south and north bridge body structures, when the south and north bridge body structures are in the normal closed state, the locking rod is opened to insert the pin seat, the receiving seat is accurately positioned, drilled and installed on site, and accurate centering is realized.

[0104] The present application adopts the method of independent construction of the south and north bridges, after the installation and debugging of the single side of the bridge body are completed, the bridge body is opened, the installation of the other half of the bridge body is performed, the influence on the navigation channel is reduced, and according to the time characteristics of the large ship passing, the navigation time period is mastered and controlled, and the joint debugging of the whole bridge is performed; through the erection of the crane rail steel platform on the main pier box of the movable bridge, the cantilever assembly construction method of the crawler crane is adopted, the weight and size of the single hoisting component are reduced, large special equipment is not needed, the smooth implementation of the project is ensured, the influence on the navigation channel is minimized, and good economic and social benefits are obtained.

[0105] Furthermore, although the operations of the method of the present application are described in a particular, sequential order, this order is not meant to be a limitation and is not intended to imply that there is an absolute requirement that the operations be performed in the order described. On the contrary, many of the operations can be performed in any order, added to, or omitted from the operations described. Also, in some implementations, aspects of two or more of the operations can be combined into a single operation, and / or a single operation can be separated into two or more operations.

[0106] It is to be understood that all the improvements and changes that can be made to the above-described embodiments of the present application are to be considered as falling within the true scope of the present application as defined by the appended claims.

[0107] The above description of the present application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form described, and many modifications and variations are possible in light of this disclosure. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A method of constructing a double-leaf bascule bridge, characterized in that, Comprise: Step S1: installation of the first section of the north bridge crane rail platform and the lower crane rail platform support; Step S2: installation of the north bridge bearing seat and hydraulic oil cylinder; Step S3: installation of the upper crane rail platform of the north bridge; Step S4: installation of the north bridge bearing section, counterweight section and cantilever section; Step S5: paving of the north bridge deck and debugging of the single-side bridge body of the north bridge, after the installation of the north bridge body is completed and the debugging is finished, the bridge body is opened, and the installation of the other half of the bridge body is performed; Step S6: installation of the lower crane rail platform support and the first section of the crane rail platform of the south bridge; Step S7: installation of the south bridge bearing seat and hydraulic oil cylinder; Step S8: installation of the upper crane rail platform of the south bridge; Step S9: installation of the south bridge bearing section, counterweight section and cantilever section; Step S10: paving of the south bridge deck and debugging of the single-side bridge body of the south bridge; Step S11: combined debugging of the north and south bridges and installation of the central locking device; The double-leaf vertical rotating opening bridge comprises two symmetrically arranged single-side bridge bodies, the single-side bridge body comprises a pier, a bearing seat, a hydraulic oil cylinder, a central locking device and a bridge body steel structure, the bearing seat and the hydraulic oil cylinder are arranged between the bridge body steel structure and the pier, The bridge body steel structure is spliced by a counterweight section, a bearing section and a cantilever section, the bearing section is rotationally connected with the pier through the bearing seat, the movable end of the hydraulic oil cylinder is fixed with the bearing section, the fixed end of the hydraulic oil cylinder is fixed with the pier, the hydraulic oil cylinder drives the bridge body steel structure to rotate along the bearing seat, and the central locking device is arranged at the front end of the cantilever section; The counterweight section, the bearing section and the cantilever section each comprise a plurality of spaced main longitudinal beams, a plurality of spaced main transverse beams are arranged between adjacent two main longitudinal beams, a plurality of spaced secondary longitudinal beams are arranged at the top between adjacent two main transverse beams, a plurality of spaced secondary transverse beams are arranged between adjacent two secondary longitudinal beams, and horizontal diagonal braces are arranged at the bottom of the main longitudinal beam between adjacent two main transverse beams, a cavity is formed between the secondary longitudinal beam, the secondary transverse beam and the horizontal diagonal brace, and a hole through which a person can pass is arranged on the main transverse beam corresponding to the maintenance channel; A counterweight box is arranged between the ends of adjacent two main longitudinal beams of the counterweight section, a bearing seat and a hydraulic oil cylinder are arranged between each main longitudinal beam of the bearing section and the pier, each main longitudinal beam of the bearing section is connected with the corresponding bearing seat through a rotating shaft assembly, and each main longitudinal beam of the bearing section is connected with the movable end of the corresponding hydraulic oil cylinder through an oil cylinder upper support.

2. The method of constructing a double-leaf bascule bridge according to claim 1, wherein The counterweight section comprises a first section, the bearing section comprises a second section, the cantilever section comprises a third section and a fourth section, and the first section, the second section, the third section and the fourth section are spliced in sequence.

3. The method of constructing a double-leaf bascule bridge according to claim 1, wherein The front support upper support is arranged at the bottom of each main longitudinal beam of the bearing section, the oil cylinder upper support is arranged between the front support upper support and the rotating shaft assembly, the front end top of the pier is provided with a plurality of front support lower supports matched with the front support upper supports, and each front support upper support is in contact with the corresponding front support lower support when the single-side bridge body is in the closed state.

4. The method of constructing a double-leaf bascule bridge according to claim 1, wherein The pier comprises a main pier bearing platform and a main pier box chamber arranged on the main pier bearing platform, bearing seat steel supports and oil cylinder lower supports are arranged in the main pier box chamber, the bearing seat is fixed at the top of the bearing seat steel supports through a bearing seat cross beam, and the fixed end of the hydraulic oil cylinder is connected with the oil cylinder lower supports.

5. The method of constructing a double-leaf bascule bridge according to claim 4, wherein The top of the shear wall on the two sides of the main pier box chamber is provided with a fixed bridge plate, the counterweight section is located directly below the fixed bridge plate, the rear end of the main pier box chamber is provided with an approach bridge, the approach bridge is flush with the fixed bridge plate, the top of the bearing section and the cantilever section is flush, the top of the bearing section and the cantilever section is higher than the top of the counterweight section, the top of the bearing section and the cantilever section is provided with a bridge deck plate, and the bridge deck plate is flush with the fixed bridge plate when the single-side bridge body is in the closed state.

6. The method of constructing a double-leaf bascule bridge according to claim 1, wherein The step S5 specifically comprises: Step S51: removal of the upper crane track platform of the north bridge; Step S52: removal of the lower crane track platform support of the north bridge; Step S53: paving of the north bridge deck concrete; Step S54: debugging of the single-side bridge body of the north bridge.

7. The method of constructing a double-leaf bascule bridge according to claim 1, wherein The step S10 specifically comprises: Step S101: removal of the upper crane track platform of the south bridge; Step S102: removal of the lower crane track platform support of the south bridge; Step S103: paving of the south bridge deck concrete; Step S104: debugging of the single-side bridge body of the south bridge.

Images