CN-122020804-A - Large-span bridge construction monitoring design method

CN122020804ACN 122020804 ACN122020804 ACN 122020804ACN-122020804-A

Abstract

The invention discloses a large-span bridge construction monitoring design method, and relates to the technical field of large-span bridge construction. The method comprises the steps of S1 obtaining data, S2 monitoring and stage dividing, S3 determining a corresponding construction monitoring target, S4 monitoring and arranging, S5 monitoring and analyzing, and S5 monitoring and analyzing, wherein the data obtaining step is used for obtaining construction information of a construction bridge to be monitored, the step of S2 monitoring and stage dividing is used for setting a corresponding monitoring scheme aiming at the stage of the construction bridge based on the construction information of the construction bridge to be monitored obtained in the step of S1, the step of determining the corresponding construction monitoring target, the step of S4 monitoring and arranging is used for determining corresponding monitoring means and arranging monitoring points and collecting monitoring data, and the step of establishing a monitoring and evaluating model to monitor and evaluate the construction process of the construction bridge to be monitored. The large-span bridge construction monitoring design method can effectively ensure smooth bridge construction and up-to-standard engineering quality.

Inventors

YAN FENG
LUO ZHIWEI
BI ZHANGLONG
SHEN JIE
LI CHENG
WU WENHUI
CHEN WEI
LIU HUI
YANG WEIFENG
ZHANG HUAMING
HU XIAORONG
GAO WEIGUANG
WANG WENQIANG
ZHAO BIN
CHEN QINGYUN

Assignees

中铁一局集团第八工程有限公司
中铁一局集团有限公司
中铁一局集团桥梁工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (9)

1. The large-span bridge construction monitoring design method is characterized by comprising the following steps of: S1, acquiring data, namely acquiring construction information of a construction bridge to be monitored; s2, a monitoring stage division step, namely setting a corresponding monitoring scheme aiming at the stage of the construction bridge based on the construction information of the construction bridge to be monitored obtained in the S1; s3, determining a monitoring target, namely determining a corresponding construction monitoring target according to the corresponding monitoring scheme obtained in the S2; S4, a monitoring arrangement step, namely determining corresponding monitoring means according to the monitoring target determined in the S3, arranging monitoring points and collecting monitoring data; And S5, monitoring and analyzing, namely, based on the monitoring data acquired in the step 4, establishing a monitoring and evaluating model to monitor and evaluate the construction process of the bridge to be constructed, and obtaining risk analysis of the construction process.
2. The method for monitoring and designing the construction of the large-span bridge according to claim 1, wherein, The construction information of the construction bridge to be monitored in the S1 comprises construction organization construction, a construction scheme, a construction method, a construction process and a construction progress plan.
3. The method for monitoring and designing the construction of the large-span bridge according to claim 1, wherein, The specific content in S2 includes: Dividing the construction stage according to the construction bridge construction information acquired in the step S1, wherein the method comprises the following steps: And a main girder segment suspension casting stage, a main girder segment pouring stage and a main girder closure stage, wherein corresponding monitoring schemes are respectively arranged according to the divided stages.
4. The method for monitoring and designing the construction of the large-span bridge according to claim 1, wherein, The monitoring target in S3 includes: 1) Technical basis and measures are provided for design and construction units according to construction quality and structural safety, wherein the construction quality comprises internal force and linear shape; 2) The internal force of the structure in the construction process and after the main bridge is completed accords with the design condition; 3) The bridged line approximates the design state; 4) Measures for precision control and error adjustment do not have a substantial adverse effect on the construction period.
5. The method for monitoring and designing the construction of the large-span bridge according to claim 3, wherein, The specific content of the arrangement monitoring points in the S4 is as follows: 1) Bridge main body structure monitoring point: The bridge main body structure monitoring points are arranged at the positions of the bridge main body, and comprise but are not limited to deformation, crack and stress conditions of a bridge girder, a bridge pier and a bridge abutment, wherein the bridge main body structure monitoring points comprise but are not limited to inclinometers, seam testers, strain gauges and displacement sensors, and change conditions of the structure are monitored in real time; 2) Construction process monitoring points: The construction process monitoring points are arranged at the positions of the construction site and comprise, but are not limited to, a construction platform, a hoisting machine and a pouring template, and safety and quality in the construction process are monitored, wherein the construction process monitoring points comprise, but are not limited to, a video monitoring camera, a sound monitor, a vibration sensor and a temperature and humidity sensor, and the condition of the construction site is monitored in real time; 3) Environmental monitoring point: The environment monitoring points are arranged in the environment around the bridge to monitor influences of meteorological conditions, geological conditions and hydrologic conditions on bridge construction, wherein the environment monitoring points comprise meteorological stations, geological monitoring points and hydrologic monitoring point monitoring equipment, and change conditions of the environment are monitored in real time.
6. The method for monitoring and designing the construction of the large-span bridge according to claim 5, wherein, And in the suspension casting stage of the girder segment, the two ends of the static cantilever construction are kept balanced, and the curve and the numerical value of the upper camber are preset based on the elastic deformation of the hanging basket.
7. The method for monitoring and designing the construction of the large-span bridge according to claim 5, wherein, And in the girder segment pouring stage, a period of uniform temperature field is selected to finish pouring positioning control on the current segment, and parameter influence identification and subsequent positioning coordinate and buckling force optimization adjustment are performed on the error.
8. The method for monitoring and designing the construction of the large-span bridge according to claim 5, wherein, And in the main girder closure stage, statistical analysis is carried out on a temperature influence rule by utilizing data collected by the monitoring points, the influence of the temperature on closure is predicted, the influence of the temperature on the closure stage is analyzed and predicted, and a counterweight is applied to the last section for adjustment.
9. The method for monitoring and designing the construction of the large-span bridge according to claim 8, wherein, The specific content in S5 includes: based on the monitoring data collected in the step S4, calculating a monitoring result and checking the monitoring result with a calculation result of a design unit; the main contents of the calculation include: (1) Structural internal force and stress of each construction stage; (2) Calculating deflection values of all construction beam sections; (3) And (5) standing the formwork elevation of each construction beam section.

Description

Large-span bridge construction monitoring design method Technical Field The invention relates to the technical field of large-span bridge construction, in particular to a large-span bridge construction monitoring design method. Background In the construction monitoring design of a large-span bridge, a common method is to combine a modern information technology and a sensor technology, and an intelligent monitoring system is adopted for comprehensive monitoring and real-time data acquisition. Sensor technology is one of key technologies of large-span bridge monitoring design, and parameters such as deformation, stress, temperature and the like of a bridge structure are monitored in real time by arranging various sensor devices such as a displacement sensor, a strain sensor, an inclinometer, a temperature sensor and the like, so that reliable data support is provided for safety and quality in a construction process. The development of modern information technology enables data acquisition and transmission to be more efficient and convenient, and real-time acquisition, transmission and storage of monitoring data can be realized through a wireless transmission technology and a cloud computing technology, so that reliable data support is provided for a monitoring system. The intelligent monitoring system is the core of the large-span bridge construction monitoring design, realizes comprehensive monitoring and real-time analysis of bridge structures and construction processes through an integrated sensor technology, a data acquisition and transmission technology and a data processing algorithm, discovers problems in time and takes corresponding measures, so that the safety and quality of construction are ensured. In the actual construction process, firstly, the bridge cantilever construction can cause short-term elastic deflection and long-term creep deflection of a statically determinate structure, so that the elevation difference of the two cantilevers is overlarge when the bridge is folded in the same span, and secondly, the problem that the actual closure temperature is inconsistent with the design reference temperature can exist under the influence of temperature. Therefore, a large-span bridge construction monitoring design method is provided to solve the difficulty existing in the prior art, and the problem to be solved by the person skilled in the art is urgent. Disclosure of Invention In view of this, the invention provides a large span bridge construction monitoring design method, which analyzes the difference between the measured data and the predicted value in real time, and carries out necessary correction on the design parameters, thereby ensuring the safety and smooth closure in bridge construction, ensuring that the internal force of the structure is in an optimal state, and the bridge formation shape meets the design and current standard requirements. In order to achieve the purpose, the invention adopts the following technical scheme that the large-span bridge construction monitoring design method comprises the following steps: S1, acquiring data, namely acquiring construction information of a construction bridge to be monitored; s2, a monitoring stage division step, namely setting a corresponding monitoring scheme aiming at the stage of the construction bridge based on the construction information of the construction bridge to be monitored obtained in the S1; s3, determining a monitoring target, namely determining a corresponding construction monitoring target according to the corresponding monitoring scheme obtained in the S2; S4, a monitoring arrangement step, namely determining corresponding monitoring means according to the monitoring target determined in the S3, arranging monitoring points and collecting monitoring data; And S5, monitoring and analyzing, namely, based on the monitoring data acquired in the step 4, establishing a monitoring and evaluating model to monitor and evaluate the construction process of the bridge to be constructed, and obtaining risk analysis of the construction process. The method, optionally, the construction information of the construction bridge to be monitored in the step S1 comprises construction organization construction, construction scheme, construction method, construction process and construction progress plan. In the above method, optionally, the specific content in S2 includes: Dividing the construction stage according to the construction bridge construction information acquired in the step S1, wherein the method comprises the following steps: And a main girder segment suspension casting stage, a main girder segment pouring stage and a main girder closure stage, wherein corresponding monitoring schemes are respectively arranged according to the divided stages. In the above method, optionally, the monitoring target in S3 includes: 1) Technical basis and measures are provided for design and construction units according to construction quality and struct