Method for erecting bridge suspension frame construction platform

Abstract

The invention discloses an erecting method for a bridge suspension frame construction platform. The erecting method comprises the following steps that construction preparation is conducted; bridge core-pulling drilling: drilling the measured and marked point positions of the bridge surface of the arch bridge; an upper support is installed, a layer of frame pipe is installed on the bridge floor of the arch bridge in the longitudinal drilling direction, a vertical suspension pipe is installed on the bridge floor of the arch bridge in the longitudinal drilling direction, and the vertical suspension pipe and the layer of frame pipe are connected and locked through a fastener. The invention provides a method for erecting a bridge suspension frame construction platform to solve the problems that a traditional construction support is inconvenient to erect due to underbridge navigation requirements during underbridge maintenance and reinforcement construction operation of a two-way curved arch bridge, and meanwhile certain limitation exists during construction operation by using a bridge inspection vehicle. The suspension frame construction platform meeting the construction requirements is obtained by assembling and splicing the fasteners and pin-connecting the pipe fittings in manners of mounting the frame pipe and the suspension pipe, so that the construction cost is reduced, and the efficiency of construction operation is improved at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a method for erecting a bridge suspension frame construction platform. Background Art

[0002] A hyperbolic arch bridge is a type of bridge structure, which is characterized by the arch curve presenting a hyperbolic shape in both the horizontal and vertical directions. This design enables the bridge to better disperse stress when bearing loads, thereby improving the stability and durability of the bridge. Its most important feature is that the main arch rings are constructed in sequence by the method of "breaking the whole into parts", and then combined into a load-bearing overall structure by the method of "combining the parts into a whole". Because the main arch rings are formed in stages, they present the stress characteristics of a combined structure, with weak integrity and are easily damaged under seismic loads.

[0003] For the maintenance and reinforcement of general bridges, bridge inspection vehicles or full-bridge scaffolding are often used as construction platforms under the bridge. During the maintenance and reinforcement of hyperbolic arch bridges, it is often inconvenient to set up traditional construction scaffolding due to the navigation requirements under the bridge. At the same time, the use of bridge inspection vehicles for construction has certain limitations, which brings inconvenience to the construction work under the bridge. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of the above-mentioned background technology and to propose a method for erecting a bridge suspension frame construction platform.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for erecting a bridge suspension frame construction platform comprises the following steps:

[0007] S1. Construction preparation;

[0008] S2, bridge core drilling, drilling holes at the measured and marked points on the arch bridge deck;

[0009] S3. Install the upper support, install a layer of rack pipes on the arch bridge deck along the longitudinal drilling direction, install vertical suspension pipes on the arch bridge deck along the longitudinal drilling direction, and connect and lock with a layer of rack pipes using fasteners, use fasteners to connect and lock the transverse arm pipes with the vertical suspension pipes on the arch bridge deck, and then install the remaining vertical suspension pipes on the periphery of the arch bridge through the connected and locked transverse arm pipes, and use fasteners to connect and lock the remaining vertical suspension pipes on the periphery of the arch bridge with the transverse arm pipes:

[0010] S4. Install the lower platform frame, install the bottom platform pipe on the first row of vertical suspension pipes of the existing bridge, use fasteners to connect and lock it, and set the longitudinal forward pipe to connect and lock it with the bottom platform pipe using fasteners.

[0011] As a further solution of the present invention: in S1, construction preparation, that is, simulation calculations are made on the suspension frame construction platform and the bridge before construction, the feasibility of the hanger construction plan is checked, relevant construction machinery and required prefabricated materials are prepared, and specific points of the bridge are measured and marked to prepare for subsequent steps.

[0012] As a further solution of the present invention: in S2, the bridge core drilling is performed, that is, the construction machinery is used to perform core drilling operations on the measured and marked points on the arch bridge deck, and the diameter of the drilled bridge hole is slightly larger than the diameter of the vertical suspension pipe.

[0013] As a further solution of the present invention: In S3, a second layer of frame pipes needs to be installed: a second layer of frame pipes should be installed at a position where there is a height difference between the bridge deck and the sidewalk, forming a truss structure with the first layer of frame pipes. The second layer of frame pipes are installed on the first layer of frame pipes, and fasteners are used to connect and lock the vertical suspension pipes on the arch bridge deck to stabilize the upper support structure.

[0014] As a further solution of the present invention: in S4, the bottom platform tube is installed: the lower platform frame is installed, and the construction is started from the arch foot of the pier. While maintaining the accurate height and position, the bottom platform tube is installed on the first row of vertical suspension tubes of the existing bridge, and fasteners are used to connect and lock. When the bottom platform tube is at the pier column position, one end of the bottom platform tube is firmly welded to the pier by the anchoring method.

[0015] As a further solution of the present invention: in S4, a longitudinal forward pipe is installed: under the premise that all platform surfaces are safe and reliable, bamboo plywood or other material bottom plates are fully paved, and the longitudinal forward pipe is connected and locked with the bottom platform pipe by fasteners. In positions with longer spans, three vertical suspension pipes need to be fixed as longitudinal forward pipes. The first two are located on the existing platform and installed with the third vertical suspension pipe, that is, the suspension platform is erected several meters forward to ensure that construction workers are suspended and standing on two steel pipes. Safety protection pipes are constructed simultaneously on both sides of the longitudinal forward pipe channel to ensure that construction workers are suspended and standing on two steel pipes with safety guardrails for protection.

[0016] As a further solution of the present invention: after the longitudinal forward pipe and the safety protection pipe are all locked safely and reliably, the construction personnel can move forward to suspend and consolidate the vertical suspension pipe in front, and after locking the vertical suspension pipe, they can install the remaining system steel pipes, and repeat the forward movement operation after completion.

[0017] As a further solution of the present invention: the pipe connection method of the upper bracket is based on the fastener connection method, and the nodes of the pipe connection are connected by pins, so that the upper bracket structure is more stable.

[0018] As a further solution of the present invention: it also includes step S5, quality inspection:

[0019] According to the actual situation on site and in compliance with relevant inspection specifications, check whether the erected suspension construction platform complies with safety regulations and whether it will cause safety and stability problems to the bridge as a whole.

[0020] As a further solution of the present invention: in S5, quality inspection, that is, according to the actual situation on site and in compliance with relevant inspection specifications, checks are performed to check whether the erected suspension frame construction platform complies with safety regulations and whether it will cause safety and stability problems to the bridge as a whole.

[0021] Beneficial effects of the present invention: The present invention aims at the maintenance and reinforcement construction work under a hyperbolic arch bridge. Because the navigation requirement under the bridge makes it inconvenient to set up traditional construction scaffolding, and the use of bridge inspection vehicles for construction work has certain limitations, a method for setting up a bridge suspension frame construction platform is proposed. By core drilling at specific positions on the arch bridge deck, installing frame pipes and suspension pipes, and utilizing fastener assembly and splicing and pipe pinning, a suspension frame construction platform that meets the construction requirements is obtained, thereby reducing construction costs and improving the efficiency of construction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic cross-sectional diagram of a core-pulling drilling hole on an arch bridge deck in a method for erecting a bridge suspension frame construction platform of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of installing an upper bracket in a method for erecting a bridge suspension frame construction platform of the present invention;

[0025] Figure 3 It is a schematic diagram of the bridge elevation for installing the upper support in a method for erecting a bridge suspension frame construction platform of the present invention;

[0026] Figure 4 It is a schematic cross-sectional view of installing a lower platform frame in a method for erecting a bridge suspension frame construction platform of the present invention;

[0027] Figure 5 It is a schematic diagram of the bridge elevation of installing the lower platform frame in a method for erecting a bridge suspension frame construction platform of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of a bridge suspension frame construction platform in a method for erecting a bridge suspension frame construction platform of the present invention;

[0029] Figure 7 It is an enlarged schematic diagram of point A in a method for erecting a bridge suspension frame construction platform of the present invention;

[0030] Figure 8 It is an enlarged schematic diagram of point B in a method for erecting a bridge suspension frame construction platform of the present invention.

[0031] In the figure: 1. First-layer frame pipe; 2. Vertical suspension pipe; 3. Horizontal arm pipe; 4. Second-layer frame pipe; 5. Bottom platform pipe; 6. Longitudinal forward pipe; 7. Fastener; 8. Arch bridge deck. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 6 , Figure 7 , Figure 8 As shown, the present invention is a method for erecting a bridge suspension frame construction platform, comprising the following steps:

[0034] Step S1, construction preparation: perfecting the construction platform erection plan, numerical calculation of suspension frame construction platform simulation, preparation of construction machinery and materials, on-site inspection and measurement;

[0035] Specifically, in this embodiment, the step S1 is construction preparation, that is, simulation calculations are made on the suspension frame construction platform and the bridge before construction, the feasibility of the hanger construction plan is verified, relevant construction machinery and required prefabricated materials are prepared, the drilling positions are preliminarily planned, points are marked on the drawings for multiple confirmations and modifications, and specific points of the bridge are measured and marked to prepare for subsequent steps.

[0036] See also Figure 1 As shown, step S2 is bridge core drilling, i.e. using crawler drilling rig D75 to carry out core drilling operation on the measured and marked points on the arch bridge deck 8, with a core drilling spacing of 1 hole every 2 meters, and the drilled bridge hole diameter is slightly larger than the hole diameter of the vertical suspension pipe 2.

[0037] See also Figure 2 , Figure 3 As shown, the step S3 of installing the upper bracket includes the following steps:

[0038] Specifically, in this embodiment, please refer to Figure 2 The step S3 of installing a layer of rack pipe 1 comprises the following steps:

[0039] S31 installing a layer of frame pipes 1: installing a layer of frame pipes 1 on the arch bridge deck 8 along the longitudinal drilling direction, so that the layer of frame pipes 1 is closely attached to the arch bridge deck 8, and fastened with fasteners 7 or welded to prevent slipping;

[0040] Specifically, in this embodiment, please refer to Figure 2 The step S3 of installing the vertical suspension pipe 2 comprises the following steps:

[0041] S32 installing the vertical suspension pipe 2: installing the vertical suspension pipe 2 on the arch bridge deck 8 along the longitudinal drilling direction, and connecting and locking it with a layer of frame pipes 1 using fasteners 7 to prevent the vertical suspension pipe 2 from shaking;

[0042] Specifically, in this embodiment, please refer to Figure 2 The step S3 of installing the transverse arm tube 3 comprises the following steps:

[0043] S33 installing the transverse arm tube 3: using the fastener 7 to connect and lock the transverse arm tube 3 with the vertical suspension tube 2 on the arch bridge deck 8, and then installing the remaining vertical suspension tubes 2 on the periphery of the arch bridge through the connected and locked transverse arm tube 3, and using the fastener 7 to connect and lock the remaining vertical suspension tubes 2 on the periphery of the arch bridge with the transverse arm tube 3;

[0044] Specifically, in this embodiment, please refer to Figure 2 The step S3 of installing the transverse arm tube 3 comprises the following steps:

[0045] S34 Install the second-layer pipe rack 4: Where there is a height difference between the bridge deck and the sidewalk, a second-layer pipe rack 4 should be installed to form a truss structure with the first-layer pipe rack 1. The second-layer pipe rack 4 is installed on the first-layer pipe rack 1 and is connected and locked with the vertical suspension pipe 2 on the arch bridge deck 8 using fasteners 7 to stabilize the upper support structure.

[0046] It should also be noted that the connection method of the upper bracket pipe is based on the connection method of the fastener 7, and the nodes of the pipe connection are pin-connected to make the upper bracket structure more stable.

[0047] See also Figure 4 , Figure 5 As shown, the step S4 installs the lower platform frame, including the following steps:

[0048] Specifically, in this embodiment, please refer to Figure 4 The step S4 of installing the bottom platform pipe 5 comprises the following steps:

[0049] S41 Install the bottom platform pipe 5: Install the lower platform frame, start construction from the arch foot of pier No. 1, keep the height and position accurate, install the bottom platform pipe 5 on the first row of vertical suspension pipes 2 of the existing bridge, use fasteners 7 to connect and lock, when the bottom platform pipe 5 is at the pier column position, use the reinforcement method to weld one end of the bottom platform pipe 5 to the pier firmly;

[0050] Specifically, in this embodiment, please refer to Figure 4The step S4 of installing the longitudinal forward pipe 6 comprises the following steps:

[0051] S42 installs the longitudinal forward pipe 6: on the premise that all platform surfaces are safe and reliable, fully pave the bottom plate with bamboo plywood or other materials, and set the longitudinal forward pipe 6 to connect and lock with the bottom platform pipe 5 using fasteners 7. In the position with a longer span, three vertical suspension pipes 2 need to be fixed as the longitudinal forward pipe 6. The first two are located on the existing platform and installed with the third vertical suspension pipe 2, that is, the suspension platform is erected 2 meters forward to ensure that the construction workers are suspended and standing on the two steel pipes. On both sides of the longitudinal forward pipe 6 channel, safety protection pipes are constructed simultaneously to ensure that the construction workers are suspended and standing on the two steel pipes with safety guardrails for protection. Only after the longitudinal forward pipe 6 and the safety protection pipes are all locked safely and reliably, the construction workers can move forward to suspend and consolidate the vertical suspension pipe 2 in front. After locking it with the vertical suspension pipe 2, the installation of the remaining system steel pipes is constructed. After completion, the forward movement operation is repeated.

[0052] It should also be noted that the suspended steel pipe platform is constructed from the arch foot to the arch top. The arch foot is advanced by setting a step every 2 meters. The arch top is relatively flat and no steps are set, so the arch top forms a larger operating platform.

[0053] Due to the construction requirements of the arch foot corbel, the arch foot position needs to ensure that the two piers play a certain bearing role in the suspended steel pipe platform. The suspended steel pipe needs to be set up at the two suspended pipe positions of the arch foot. A double-layer operating platform is set up. The operating platform hanger and the formwork support are set up independently. The hanger is constructed in different spans and adopts flow operation.

[0054] When the hanger is constructed at the pier position, it is necessary to extend 3 meters on both sides of the pier, and the upstream and downstream need to be suspended 1.5 meters to serve as the starting point for the next span of the hanger. When the hanger is erected, the scaffolding board at the working position needs to be erected simultaneously and fixed with steel wire to ensure that each area is stable;

[0055] The formwork support adopts the arch-assisted force-bearing mode. The lower part and the side are locked with steel pipe fasteners 7, and the upper part is fixed with 14mm steel wire rope and screw combination and embedded reinforcement to prevent the hanger from swinging due to the activities of migrant workers and damaging the joint between the new and old concrete.

[0056] The internal operation platform of the steel hanger is located 1 meter below the arch rib bottom plate. The operators can only complete the related work at the arch rib bottom plate. Above the steel hanger platform, 0.3 meters below the arch rib bottom plate, an arch auxiliary concrete pouring platform needs to be installed. If there is a defect on the top of the arch wave, the operator needs to repair it. At the corresponding position, an operation platform needs to be set up;

[0057] During the arch rib reinforcement construction, operators need to access the required passages to reach the work site. The construction of the water steel hanger platform starts from the pier position. All materials need to be manually transferred from the material storage site to the external suspension platform of the bridge deck, and then passed down by workers to the arch wave top platform. Then, workers pass down from the arch wave top platform to the workers' construction working surface platform, and finally from the workers' construction working surface platform to the construction site. The materials are transferred through multiple suspension brackets.

[0058] The step S5 quality inspection is to check whether the erected suspension frame construction platform complies with safety regulations and whether it will cause safety and stability problems to the bridge as a whole according to the actual situation on site and in compliance with relevant inspection specifications.

[0059] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A method for erecting a bridge suspension frame construction platform, characterized in that: The steps include: S1. Construction preparation; S2, bridge core drilling, drilling holes at the measured and marked points on the arch bridge deck (8); S3, installing the upper support, installing a layer of frame pipes (1) on the arch bridge deck (8) along the longitudinal drilling direction, installing the vertical suspension pipes (2) on the arch bridge deck (8) along the longitudinal drilling direction, and connecting and locking the layer of frame pipes (1) with the fasteners (7), using the fasteners (7) to connect and lock the transverse arm pipes (3) with the vertical suspension pipes (2) on the arch bridge deck (8), and then installing the remaining vertical suspension pipes (2) on the periphery of the arch bridge through the connected and locked transverse arm pipes (3), and using the fasteners (7) to connect and lock the remaining vertical suspension pipes (2) on the periphery of the arch bridge with the transverse arm pipes (3): S4, installing the lower platform frame, installing the bottom platform pipe (5) on the first row of vertical suspension pipes (2) of the existing bridge, connecting and locking them with fasteners (7), and setting the longitudinal forward pipe (6) and connecting and locking it with the bottom platform pipe (5) with fasteners (7).

2. A method for erecting a bridge suspension frame construction platform according to claim 1, characterized in that: In S1, construction preparation is to make simulation calculations on the suspension frame construction platform and bridge before construction, check the feasibility of the suspension frame construction plan, prepare relevant construction machinery and required prefabricated materials, measure and mark specific points of the bridge, and prepare for subsequent steps.

3. A method for erecting a bridge suspension frame construction platform according to claim 1, characterized in that: In S2, the bridge core drilling is performed, i.e., a construction machine is used to perform core drilling operations on the measured and marked points on the arch bridge deck (8), and the diameter of the drilled bridge hole is slightly larger than the diameter of the vertical suspension pipe (2).

4. A method for erecting a bridge suspension frame construction platform according to claim 1, characterized in that: In S3, a second layer of pipe racks (4) need to be installed: at the position where there is a height difference between the bridge deck and the sidewalk, a second layer of pipe racks (4) should be installed to form a truss structure with the first layer of pipe racks (1). The second layer of pipe racks (4) are installed on the first layer of pipe racks (1) and connected and locked with the vertical suspension pipes (2) on the arch bridge deck (8) using fasteners (7) to stabilize the upper support structure.

5. The method for erecting a bridge suspension frame construction platform according to claim 1 is characterized in that: In S4, the bottom platform pipe (5) is installed: the lower platform frame is installed, and the construction starts from the arch foot of the bridge pier. While maintaining the height and position accurately, the bottom platform pipe (5) is installed on the first row of vertical suspension pipes (2) of the existing bridge, and fasteners (7) are used for connection and locking. When the bottom platform pipe (5) is at the pier column position, one end of the bottom platform pipe (5) is welded firmly to the bridge pier by using the anchoring method.

6. A method for erecting a bridge suspension frame construction platform according to claim 1, characterized in that: In S4, the longitudinal forward pipe (6) is installed: on the premise that all platform surfaces are safe and reliable, bamboo plywood or other material bottom plates are fully paved, and the longitudinal forward pipe (6) is connected and locked with the bottom platform pipe (5) using fasteners (7). In the position with a longer span, three vertical suspension pipes (2) need to be fixed as the longitudinal forward pipe (6). The first two are located on the existing platform and installed with the third vertical suspension pipe (2). That is, the suspension platform is set forward a few meters to ensure that the construction personnel are suspended and standing on the two steel pipes. On both sides of the longitudinal forward pipe (6) channel, safety protection pipes are simultaneously constructed to ensure that the construction personnel are suspended and standing on the two steel pipes with safety guardrails for protection.

7. A method for erecting a bridge suspension frame construction platform according to claim 6, characterized in that: After the longitudinal forward pipe (6) and the safety protection pipe are all locked securely, the construction personnel can move forward to suspend and consolidate the front vertical suspension pipe (2), and after locking the vertical suspension pipe (2), they can install the remaining system steel pipes, and repeat the forward movement operation after completion.

8. A method for erecting a bridge suspension frame construction platform according to claim 4, characterized in that: The pipe connection method of the upper bracket is based on the fastener (7) connection method, and the nodes of the pipe connection are connected by pins, so that the upper bracket structure is more stable.

9. A method for erecting a bridge suspension frame construction platform according to claim 1, characterized in that: It also includes step S5, quality inspection: According to the actual situation on site and in compliance with relevant inspection specifications, check whether the erected suspension construction platform complies with safety regulations and whether it will cause safety and stability problems to the bridge as a whole.

10. A method for erecting a bridge suspension frame construction platform according to claim 9, characterized in that: In S5, quality inspection is to check whether the erected suspension construction platform complies with safety regulations and whether it will cause safety and stability problems to the bridge as a whole according to the actual situation on site and in compliance with relevant inspection specifications.

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