A steel arch based through arch bridge construction method

Abstract

The application discloses a steel arch support-based deck arch bridge construction method and relates to the technical field of building construction. The method comprises a support and transverse moving module, an arch rib construction module and a concrete pouring module. The support and transverse moving module comprises steel arch support bearing construction, installation of a transverse moving slide and a lifting device and steel arch assembly. The arch rib construction module installs arch ribs at predetermined positions by using a hoisting system, ensures the precision and stability of the arch ribs and guarantees the safety and stability of the whole bridge structure. The concrete pouring module is mainly responsible for the pouring of steel pipe concrete, tightly combines the steel pipe and the concrete and forms a solid composite structure. The accurate installation and stable support of the steel arch support can be realized by the support and transverse moving module, the installation error and the unstable support problems possibly occurring in the traditional method are avoided, the construction period is shortened, the construction efficiency is improved, the construction safety is improved when the support and transverse moving module is applied and the safety accidents possibly caused by the unstable support are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a through arch bridge construction method based on a steel arch frame. BACKGROUND

[0002] The through arch bridge is a bridge with the bridge deck system arranged on the main load-bearing structure (i.e. the arch rib), and the arch rib end (also known as the arch end) thrust is transmitted to the bedrock component at the connection between the arch bridge and the bedrock. The arch rib ends of the through arch bridge are supported on the arch seat, and the arch seat is an important component for supporting the arch structure. The arch seat for supporting the arch rib is a permanent support, which is generally a reinforced concrete structure supported on the bedrock.

[0003] Nowadays, when the steel arch frame is transversely moved, the construction operation is relatively arbitrary, and there is no unified and standardized transverse installation equipment and transverse moving method. In addition, the steel arch frame is large in size and heavy in weight, and the transverse moving of the steel arch frame is difficult. In the transverse moving process, there are inevitably problems such as complex transverse moving process, unstable steel arch frame, slow transverse moving speed, etc. Moreover, after the steel arch frame is transversely moved to the position, it is not easy to support the steel arch frame. At the same time, when the steel arch frame is moved out from under the arch rib which has been poured and formed, the steel arch frame is stably supported on the bottom of the arch rib which has been poured and formed. Therefore, when the steel arch frame is moved out from under the arch rib, it is very difficult to move out, and the steel arch frame will inevitably be deformed during the moving out process, and even damaged. SUMMARY

[0004] The purpose of the present application is to provide a through arch bridge construction method based on a steel arch frame to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a through arch bridge construction method based on a steel arch frame, comprising:

[0006] The support and transverse moving module includes steel arch frame support construction, installation of transverse sliding and lifting devices, and steel arch frame assembly.

[0007] The arch rib construction module uses a hoisting system to install the arch rib at a predetermined position to ensure the accuracy and stability of the arch rib, thereby ensuring the safety and stability of the entire bridge structure.

[0008] The concrete pouring module is mainly responsible for the pouring of steel pipe concrete, so that the steel pipe and the concrete are tightly combined to form a solid composite structure.

[0009] The stress and deformation observation module observes the stress and deformation of the arch rib in real time by setting resistance sheets and displacement observation marks during the construction process.

[0010] As one specific solution in the technical solution of the present application, the support and transverse moving module comprises the following steps:

[0011] Step 1: Foundation treatment: By leveling and compacting the construction site, ensure the firmness and flatness of the foundation, and for soft foundation, special treatment is needed to provide stable support foundation;

[0012] Step 2: Support structure design: According to the size, weight and construction requirements of steel arch, design the support structure, which should have enough bearing capacity and stability to ensure the placement and construction process of steel arch without deformation or displacement;

[0013] Step 3: Support installation: According to the design requirements, accurately install the support structure, and during the installation process, ensure the levelness and perpendicularity of the support structure, and take appropriate fixing measures to prevent the support structure from moving or deforming during construction;

[0014] Step 4: Laying of transverse track: Lay the transverse track in the construction site, which should be flat and stable, and maintain appropriate distance with the support structure, and the laying precision of the track should meet the construction requirements to ensure the stability of the steel arch during transverse movement;

[0015] Step 5: Installation of transverse equipment: According to the weight and transverse distance of the steel arch, select the transverse equipment, which should be installed between the steel arch and the track to ensure the smooth movement of the steel arch during transverse movement;

[0016] Step 6: Transverse operation: During the transverse movement, the transverse speed should be strictly controlled to ensure the stability and safety of the steel arch, and the position and state of the steel arch should be monitored in real time to stop the transverse operation immediately if any abnormality is found.

[0017] As a specific solution in the technical scheme of the present application, the arch rib construction module comprises the following steps:

[0018] Step S1: Arch rib prefabrication: According to the design requirements, select appropriate concrete and control its water-cement ratio and mixing time to ensure the uniformity and strength of the concrete, and according to the design requirements, support the arch rib template and conduct stability inspection, install the template at the predetermined position and fix it with bolts or other connecting parts to ensure the stability and flatness of the template, and process and weld the steel bars according to the requirements to form the skeleton of the arch rib, then pour the concrete in the template and use vibration method to ensure the compactness of the concrete;

[0019] Step S2: Arch rib transportation: Use hoisting equipment to hoist the prefabricated arch rib to the transport vehicle and ensure the stability and safety of the arch rib during transportation;

[0020] Step S3: Arch rib installation: according to the design requirements and the actual situation on site, the installation position and direction of the arch rib are determined, the arch rib is hoisted to the predetermined position using hoisting equipment, and adjustment is made to ensure that the position, angle and linearity of the arch rib meet the design requirements, after the arch rib is installed in place, welding and fixing work are carried out;

[0021] Step S4: Quality control and safety measures: based on step S3, key processes and key parts are controlled, the quality of the arch rib is ensured to meet the design requirements, and strict safety construction measures are formulated.

[0022] As one of the specific solutions in the technical scheme of the present application, the stress and deformation observation module comprises the following steps:

[0023] N1: Observation point arrangement and equipment installation: according to the key parts and stress characteristics of the bridge structure, observation points are selected, stress sensors, strain gauges and displacement meters and other observation equipment are installed at the selected observation points, and debugging is carried out to ensure that the equipment can work normally;

[0024] N2: Data acquisition and recording: according to the observation plan, the observation equipment is regularly used to collect data, and the real-time data of stress and deformation are recorded, the collected data are recorded, sorted and classified, and a complete database is established

[0025] N3: Data processing and analysis: the original data are cleaned and denoised and corrected, errors and abnormal values are eliminated, the accuracy of the data is improved, and the processed data are analyzed in depth by using professional software, and the distribution rule and change trend of stress and deformation are extracted;

[0026] N4: Monitoring and maintenance: after the bridge structure is put into use, regular stress and deformation observation is continued to ensure the safe operation of the bridge, the observation equipment is regularly maintained and updated to ensure its long-term stable operation and the accuracy of the data.

[0027] As one of the specific solutions in the technical scheme of the present application, the stress and deformation observation module should consider the influence of environmental factors such as temperature, humidity and wind force on the observation equipment, and during the construction process, the observation points should be avoided to be blocked and disturbed by construction machinery and material stacking.

[0028] As one of the specific solutions in the technical scheme of the present application, the stress and deformation observation module needs to adjust the construction scheme or take necessary reinforcement measures in time according to the observation results to ensure the safety and stability of the bridge structure.

[0029] Compared with the prior art, the present application has the following advantages:

[0030] The steel-arch-based through arch bridge construction method can realize accurate installation and stable support of the steel arch, avoids installation errors and unstable support problems in traditional methods, thereby shortening the construction period, improving the construction efficiency, and improving the construction safety of the support and transverse movement module when applied, and avoiding safety accidents that can be caused by unstable support.

[0031] Meanwhile, the stress and deformation observation module can continuously monitor the stress and deformation of key structural parts such as arch ribs in real time, which helps to find any abnormalities or potential safety hazards in time, so that corresponding measures can be taken to prevent safety accidents, and accurate observation of stress and deformation can determine the stability and safety of the bridge structure. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 The construction method flowchart of the present application is shown in the figure;

[0033] Fig. 2 The support and transverse movement module flowchart of the present application is shown in the figure;

[0034] Fig. 3 The stress and deformation observation module flowchart of the present application is shown in the figure. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] The steel arch construction of the deck arch bridge is suitable for large-span bridges crossing rivers, valleys and other terrains, especially in complex terrain and poor geological conditions. This construction method can effectively utilize the advantages of steel structure materials, quickly complete the construction of the bridge, and ensure the stability and carrying capacity of the structure. The construction usually needs to be carried out during the day to ensure good lighting and visibility, which is beneficial to the operation and safety of the construction personnel. The construction of the steel arch deck arch bridge usually requires a relatively flat and open construction site to accommodate hoisting equipment, material storage area and construction personnel activity area. Professional hoisting equipment and construction machinery such as cranes, baskets, etc. are needed for the hoisting and installation of steel arches. In addition, construction personnel need to have relevant professional skills and training, understand the construction plan and operation procedures, and strictly follow safety operation procedures during construction, including wearing safety helmets, protective equipment, and following hoisting operation specifications to ensure the safety of construction personnel. The construction relies on perfect construction drawings and design scheme, needs to cooperate closely with design and supervision units to ensure that the construction process meets the design requirements and standards. In addition, it also relies on the supply and quality control of raw materials, the normal operation of construction machinery and equipment, etc.

[0037] As shown in Figs. 1-3 , the present application provides a technical solution: a steel arch deck arch bridge construction method, comprising:

[0038] Support and transverse movement module: this module includes steel arch support construction, installation of transverse sliding and lifting devices, steel arch assembly, etc.;

[0039] Arch rib construction module: use hoisting system to install arch rib at predetermined position, ensure the accuracy and stability of arch rib, to ensure the safety and stability of the whole bridge structure;

[0040] Concrete pouring module: this module is mainly responsible for the pouring work of steel pipe concrete, so that steel pipe and concrete are closely combined to form a solid composite structure;

[0041] Stress and deformation observation module: during construction, resistance sheet and displacement observation mark are set to observe the stress and deformation of arch rib in real time.

[0042] The support and transverse movement module includes the following steps:

[0043] Step 1: foundation treatment: through the leveling and compaction of the construction site, the firmness and flatness of the foundation are ensured, and special treatment is carried out for soft foundation to provide stable support foundation;

[0044] Step 2: support structure design: according to the size, weight and construction requirements of steel arch, design support structure, support structure should have enough carrying capacity and stability to ensure that steel arch does not deform or displace during placement and construction process;

[0045] Step 3: Support installation: According to the design requirements, accurately install the support structure, and ensure the levelness and perpendicularity of the support structure during installation. Take appropriate fixing measures to prevent the support structure from moving or deforming during construction;

[0046] Step 4: Lateral rail laying: Lay the lateral rail in the construction site, and the rail should be flat and stable, and maintain appropriate distance with the support structure. The laying accuracy of the rail should meet the construction requirements to ensure the stability of the steel arch during lateral movement;

[0047] Step 5: Lateral equipment installation: According to the weight and lateral distance of the steel arch, select the lateral equipment, and install it between the steel arch and the rail to ensure the smooth movement of the steel arch during lateral movement;

[0048] Step 6: Lateral operation: During lateral movement, strictly control the lateral speed to ensure the stability and safety of the steel arch. At the same time, monitor the position and state of the steel arch in real time, and stop the lateral operation immediately if any abnormality is found.

[0049] The arch rib construction module includes the following steps:

[0050] Step S1: Arch rib prefabrication: Select appropriate concrete according to design requirements, control water-cement ratio and mixing time to ensure uniformity and strength of concrete, and according to design requirements, support arch rib formwork and conduct stability inspection. Install formwork at predetermined position and fix it with bolts or other connectors to ensure stability and flatness of formwork. Process and weld steel bars to form arch rib framework, then pour concrete in formwork and use vibration method to ensure concrete density;

[0051] Step S2: Arch rib transportation: Use hoisting equipment to hoist prefabricated arch rib to transport vehicle and ensure stability and safety of arch rib during transportation;

[0052] Step S3: Arch rib installation: Determine installation position and direction of arch rib according to design requirements and actual site conditions, use hoisting equipment to hoist arch rib to predetermined position and adjust to ensure position, angle and linearity of arch rib meet design requirements. After arch rib installation, conduct welding and fixing work;

[0053] Step S4: Quality control and safety measures: Based on step S3, focus on controlling key processes and key parts to ensure quality of arch rib meets design requirements, and develop strict safety construction measures.

[0054] The stress and deformation observation module includes the following steps:

[0055] N1: Observation point arrangement and equipment installation: According to the key parts and stress characteristics of the bridge structure, select observation points, install stress sensors, strain gauges, displacement meters and other observation equipment at the selected observation points, and debug to ensure that the equipment can work normally;

[0056] N2: Data collection and recording: According to the observation plan, regularly collect data from the observation equipment, record real-time stress and deformation data, record, organize and classify the collected data, and establish a complete database. Through the establishment of the database, historical data can be easily queried and analyzed, and important basis can be provided for subsequent bridge operation and maintenance. By comparing stress and deformation data in different time periods, the stress characteristics and deformation rules of the bridge structure can be analyzed, and the future performance of the bridge can be predicted. In order to avoid human error, human intervention should be avoided as much as possible during data collection, and appropriate measures should be taken to reduce the influence of external factors;

[0057] N3: Data processing and analysis: Clean and denoise the raw data to eliminate errors and outliers, improve the accuracy of the data, and use professional software to analyze the processed data in depth to extract the distribution law and change trend of stress and deformation, including statistical analysis, trend prediction and model fitting of stress and deformation data. Through analysis, the distribution law and change trend of stress and deformation can be extracted to further understand the stress characteristics and deformation characteristics of the bridge structure. By analyzing stress and deformation data in different time periods, the stress state of the bridge structure in different construction stages or different environmental conditions can be analyzed. By drawing the distribution diagram of stress and deformation, the stress distribution and deformation of the bridge structure can be directly displayed, and by establishing a mathematical model to fit and predict the data, the future performance of the bridge structure can be predicted. By comparing the observation data with the theoretical calculation results, the correctness and rationality of the engineering design can be verified, and possible problems and deficiencies in the design can be found and adjusted and optimized in time;

[0058] N4: Monitoring and maintenance: After the bridge structure is put into use, continue to observe the stress and deformation regularly to ensure the safe operation of the bridge, and regularly maintain and update the observation equipment to ensure its long-term stable operation and data accuracy.

[0059] The stress and deformation observation module should consider the influence of environmental factors such as temperature, humidity and wind on the observation equipment. During construction, construction machinery and material stacking should be avoided to block and interfere with the observation points.

[0060] The stress and deformation observation module needs to adjust the construction scheme or take necessary reinforcement measures in time according to the observation results to ensure the safety and stability of the bridge structure.

[0061] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the embodiments disclosed except insofar as recited in the claims.

Claims

1. A construction method of a steel arch frame based through arch bridge, characterized by, Comprise: Support and transverse module: this module includes steel arch support construction, installation of transverse slide and lifting device, steel arch assembly; Arch rib construction module: use hoisting system to install arch rib in predetermined position, ensure the accuracy and stability of arch rib, to ensure the safety and stability of the whole bridge structure; Concrete pouring module: this module is responsible for the pouring of steel pipe concrete, making steel pipe and concrete closely combined, forming a solid composite structure; Stress and deformation observation module: during construction, through the setting of resistance sheet and displacement observation mark, real-time observation of stress and deformation of arch rib; The support and transverse module comprises the following steps: Step 1: foundation treatment: by leveling and compacting the construction site, ensure the firmness and flatness of the foundation, special treatment for soft foundation, to provide stable support foundation; Step 2: support structure design: according to the size, weight and construction requirements of steel arch, design support structure, support structure should have enough bearing capacity and stability, to ensure the placement and construction process of steel arch without deformation or displacement; Step 3: support installation: according to the design requirements, accurate installation of support structure, during installation, should ensure the levelness and perpendicularity of support structure, and take appropriate fixing measures to prevent the movement or deformation of support structure during construction; Step 4: laying of transverse track: laying transverse track in construction site, track should be flat and stable, and keep appropriate distance with support structure, the laying accuracy of track should meet the construction requirements, to ensure the stability of steel arch during transverse movement; Step 5: transverse equipment installation: according to the weight and transverse distance of steel arch, select transverse equipment, transverse equipment should be installed between steel arch and track, to ensure the smooth movement of steel arch during transverse movement; Step 6: transverse operation: during transverse movement, should strictly control the transverse speed, to ensure the stability and safety of steel arch, at the same time, should real-time monitor the position and state of steel arch, stop transverse operation in time when abnormal situation is found; The stress and deformation observation module comprises the following steps: N1: observation point arrangement and equipment installation: according to the key parts and stress characteristics of bridge structure, select observation point, install stress sensor, strain gauge and displacement meter observation equipment on selected observation point, and debug, to ensure the normal work of equipment; N2: data acquisition and recording: according to observation plan, regularly collect data of observation equipment, record real-time data of stress and deformation, record, arrange and classify the collected data, and establish complete database; N3: data processing and analysis: clean and denoise the original data, eliminate error and abnormal value, improve the accuracy of data, and use professional software to deeply analyze the processed data, extract the distribution rule and change trend of stress and deformation; N4: monitoring and maintenance: after the bridge structure is put into use, continue to observe stress and deformation regularly, to ensure the safe operation of bridge, regularly maintain and update observation equipment, to ensure its long-term stable operation and data accuracy.

2. The construction method of a steel arch based through arch bridge according to claim 1, characterized in that: The arch rib construction module comprises the following steps: Step S1: Arch rib prefabrication: Select appropriate concrete according to design requirements, control water-cement ratio and mixing time to ensure uniformity and strength of concrete, and according to design requirements, support arch rib formwork and check stability, install formwork at predetermined position and fix with bolts to ensure stability and flatness of formwork, process and weld steel bars according to requirements to form arch rib framework, then pour concrete in formwork and use vibration method to ensure concrete density; Step S2: Arch rib transportation: Use hoisting equipment to hoist prefabricated arch rib to transport vehicle and ensure stability and safety of arch rib during transportation; Step S3: Arch rib installation: Determine installation position and direction of arch rib according to design requirements and actual site conditions, use hoisting equipment to hoist arch rib to predetermined position and adjust to ensure that position, angle and linearity of arch rib meet design requirements, after arch rib is installed in place, perform welding and fixing work; Step S4: Quality control and safety measures: Based on step S3, key processes and key parts are controlled to ensure that the quality of arch rib meets the design requirements, and strict safety construction measures are formulated.

3. The steel arch construction method according to claim 1, wherein: The stress and deformation observation module should consider the influence of temperature, humidity and wind environment factors on the observation equipment, and avoid the shielding and interference of construction machinery and material stacking on the observation point during construction.

4. The steel arch construction method according to claim 1, wherein: The stress and deformation observation module needs to adjust the construction scheme or take reinforcement measures in time according to the observation results to ensure the safety and stability of the bridge structure.

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