KR20090008681A - Development of bridge scour field inspection system and method using common communications networks and wireless terminal unit - Google Patents

Abstract

A system, and a method for surveying a bridge scour in real-time with a commercial network and a wireless terminal are provided to increase efficiency of a bridge scour maintenance system by minimizing loss or time passage of survey data through synchronization between a server and a client. A wireless terminal downloads bridge scour survey information from an external device through remote connection, stores the bridge scour survey data in a file, and transmits data in real-time. A database server stores the bridge scour survey data received from the wireless terminal and communicates with the wireless terminal and a network terminal by using a commercial network and the remote connection. The network terminal inputs an analysis result to the database server by comparing the bridge scour survey data stored in the database server with the previously stored bridge scour survey data.

Description

Development of bridge scour field inspection system and method using common communications networks and wireless terminal unit

The present invention relates to a bridge scour field survey system and method for investigating and maintaining the scour progress status of a bridge underground or damage conditions of bridges and foundations. The present invention relates to a bridge scour field survey system and method using a commercial communication network and a wireless terminal capable of performing accurate field surveys and evaluations on the progress status and stability of the foundation and continuous maintenance of the bridge infrastructure.

In Korea, the mountainous region occupies most of the country, so when looking at the whole basin, the small and medium rivers take up a relatively large portion, and the small bridges take up a large portion, rather than the large rivers. In addition, since small and medium-sized rivers with small bridges are mostly located in mountainous regions, the river slope is large, so the flow velocity is generally fast and there is a great difference in the flow direction in normal and flood flows. In addition to these topographical features, more than two-thirds of Korea's annual rainfall is concentrated in the summer months, and due to typhoons and local torrential rains, many rains have been falling for a short period of time to further aggravate the damage. In particular, the flow rate of the small and medium rivers changes very rapidly in time, and the flow velocity is also rapidly increased, so that the deformation of the riverbed occurs quickly. Due to such temporal and spatial rainfall and topography, bridges located in small and medium rivers are particularly vulnerable to scour.

In general, foundation structures such as piers installed in rivers or rivers are excavated to a certain depth in the bottom of the water, and then constructed so that the foundation of the piers is located at the excavated site. It is constructed so that it is supported by filling and stacking aggregates of a suitable size on the upper surface of the earth and sand so that the back filled earth is not lost. However, over time, the scour occurs to wash away aggregates and soil due to the flow of water or flooding, and the scour is greatly hampered by the scour. In order to identify these scours, which can be fatal to the stability of the bridge, conventional methods allow divers to go directly into the water for visual inspection, or to penetrate dedicated equipment such as underwater cameras into the water and read by experts on land after shooting by non-experts. Scour was investigated with. However, methods that can be obtained directly from the water and surveyed or using dedicated equipment such as underwater cameras are expensive and time-consuming because they have to use diving personnel or expensive equipment. In addition, if the water in the survey area is cloudy and it is difficult to distinguish the field of view, even if it is difficult to check whether it is three or three. In the urgent case that can be reached to the maximum depth of the figure there is a problem that is not easy to cope. In addition, since periodic inspection by manpower is expensive, a system that can determine the stability of bridge scouring economically and realistically is very necessary.

On the other hand, in order to reduce the damage of bridges due to scour in the underfloor bridge, continuous maintenance of the bridge substructure is required. Through this, the progress of scour and the health of the bridge must be accurately investigated and evaluated.

In order to secure the stability of bridges against scour and river instability during flooding, it is urgent not only to establish a rational bridge scour system but also to establish a systematic maintenance system suitable for domestic conditions and conditions. In addition, the accurate investigation and evaluation of the progress of scour and the stability of the foundation and the ongoing maintenance of the bridge infrastructure are one of the most important parts of the bridge's long life.

In recent years, the possibility of bridge scour is increasing due to the occurrence of abnormal floods and the instability of the rivers, which exceed the design floods in a short period of time. Since the concentration is concentrated only on wealth and ground conditions, scour safety due to river flow during flooding is virtually overlooked. This is due to the lack of technical methods for comprehensively evaluating bridge scour capacity during flooding and the lack of data to demonstrate such techniques. In addition, the scour problem of national road bridge is managed through visual inspection and three-year underwater survey, but it is difficult to establish systematic disaster prevention measures in case of flood because it lacks rational and systematic investigation and maintenance according to risk. Therefore, in order to secure the stability of the bridge, it is necessary to evaluate and investigate the scour depth according to the detailed analysis.

Therefore, the present invention has been proposed to solve the above problems, the real-time bridge scouring site investigation and the mutual response and remote monitoring through the server-client synchronization system with the bridge scrubbing management system to monitor the site emergency It provides a bridge scour field survey system and method using a commercial communication network and a wireless terminal that can maximize the efficiency of the bridge scrubbing maintenance system by responding promptly and minimizing the loss and time-lapse effects of survey data due to direct or indirect factors. There is a purpose.

In order to achieve the above object, the present invention, a wireless terminal for downloading the bridge scrubbing survey information from an external device through a remote connection, storing the bridge scour survey data in the field and transmitting the data in real time; Stores the bridge scrubbing field survey data sent from the wireless terminal, and at the client's request, the wireless terminal and the remote terminal through a remote communication using a commercial communication network and network to enable the real-time search and data download of scour information of the bridge to be investigated A database server in communication with the network terminal; Compare the field survey data related to the bridge scrubbing inputted to the database server with the data previously input in relation to the bridge scrubbing, input a new analysis result into the database server, and confirm the analysis result by the wireless terminal. The present invention provides a bridge scour field survey system and method using a commercial communication network and a wireless terminal including a network terminal on which a server interoperating with the database server is constructed so as to complement the database server.

In addition, the present invention includes a first step of executing a program of the wireless terminal; A second step of receiving, from the database server, the radio priority terminal for surveying the bridge scrutiny information; A third step of performing a bridge scrubbing site survey by executing a bridge scrubbing spot survey program of a wireless terminal at a bridge site, and transmitting and storing the spot survey data to a database server through a remote connection using a commercial communication network; A fourth step of receiving, from a network terminal, the bridge scour field survey data inputted to the database server, comparing, reviewing and monitoring the previously input data; And a fifth step of confirming, supplementing, and storing the result analyzed by the network terminal in a database server, and using the commercial communication network and the wireless terminal.

As described above, according to the present invention, the progress of the bridge scour through the real-time bridge scour field survey using the commercial communication network and the wireless terminal and the server-client synchronization system with the bridge scrubbing management system and the remote monitoring through the remote response and remote monitoring Accurate site surveys and assessments of the stability of the foundations and continuous maintenance of the bridge infrastructure. In addition, it has the effect of maximizing the efficiency of domestic bridge scour management system by responding quickly to on-site emergency situation and minimizing the time-lapse effect and the loss of survey data due to direct / indirect factors.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 1 to 17.

The present invention provides a real-time bridge scour field survey using a commercial communication network and a wireless terminal, for example, a PDA (Personal Digital Assistant), to enable the rapid and accurate input of the bridge scour characteristics during the field survey, as well as the transmission and reception of real-time data. As a system, the bridge scrubbing maintenance system (BSMS) and Server-Client interworking and synchronization system were established. In addition, through the expansion of the database system and the further development of various calculation functions and additional functions, the analysis accuracy and functionality of the bridge scrubbing evaluation and basic risk analysis system have been improved, and the user convenience has been improved for comprehensive and systematic bridge scouring. And maintenance is possible.

The bridge scour field survey system of the present invention verified comprehensive site applicability through scour design and analysis for the national road bridge in Seoul Regional Construction Management Administration, evaluation of bearing capacity of the bridge foundation, and risk class determination.

Examples of the present invention are described in detail below.

1 is a schematic diagram showing a conceptual diagram of a real-time bridge scour field survey system using a wireless terminal according to the present invention.

As shown in the figure, the bridge scrubbing field survey system according to the present invention downloads the basic bridge information from the database server, and the wireless terminal for storing the survey data in the bridge survey site as a file or transmitting data in real time ; A database server for storing field survey data related to bridge scrubbing transmitted from the wireless terminal and outputting data according to a client's request; And compare and review field survey data related to bridge scrubbing inputted to the database server and pre-input data related to bridge scrubbing, input new analysis results into the database server, and wirelessly based on the analysis results. It includes a network terminal having a server for instructing the terminal to confirm and supplement.

In the present invention, an example of using a PDA terminal for field investigation is given, but it is not limited thereto. It is well known that the present invention may be made of a cellular phone, a digital camera, and a wireless notebook.

2 shows a conceptual diagram of a bridge scour maintenance system server-client construction.

As shown in the figure, on-site survey data relating to bridge scour is input to the database server while communicating with a database server from a remote location. The bridge scrubbing maintenance system performs input / output and management of data, risk analysis and evaluation, data retrieval and statistical functions, and inputs the calculated data into a database server and accesses and accesses data of multiple users in a network environment. Enable field monitoring. Through this, it is possible to store and manage the site characteristics quickly and accurately during the site scrubbing of bridges, and it is possible to provide emergency response in case of emergency through real-time monitoring with each bridge manager connected to the database server.

The function of the bridge scrubbing maintenance system will be described in more detail.

The data input / output management is composed of survey priority information and field survey information, and the field survey information is composed of three parts: bridge foundation information, watershed information, and bridge detail information. Survey priority information and field survey information can be input and output on the program screen.

Investigation priority I / O screen determines the investigation priority by inputting and outputting basic information such as bridge code, bridge name, management authority and administrative area and investigation priority determination criteria (eg, risk of scour, foundation type, traffic volume, river slope). .

Among the field survey information, the bridge foundation information manages the structural characteristics of the bridges such as the specifications of the bridges and foundations and scour protectors and the results of the scour analysis.In the basin information, the basin characteristics of the rivers in which the bridges are located, the scour characteristics of the bridge points and the instability of the rivers It also manages information on hydraulics, hydrological design and geotechnical design variables for flooding of design frequency events. The bridge detail information consists of four items: risk information, bridge photo information, river line information, and survey history information. The risk information manages the support capacity calculation and risk assessment results of the foundation-ground system for scouring. The bridge photo information stores and manages the pictures and pictures of bridges and watersheds. The riverbed information receives the bottom elevation information of a cross section of 30 points and shows it in a two-dimensional graph.

The risk analysis and evaluation of bridge foundations for scour is determined by the evaluation of bearing capacity of foundation-ground systems.

The data search and statistics are divided into detailed search and local search. The detailed search can be carried out with investigation priority information (local land management office, national road maintenance office, administrative district, road line, investigation priority) and field data information (local land management office, national road maintenance office, road route, investigation priority, risk level). The bridge information is searched and extracted according to the conditions, etc., and the local search searches the bridge by the city unit, the location administrative area of the bridge. In detail search, you can search for bridges by adding or deleting search conditions and applying two or more search conditions at the same time.

In case of operating using the above-mentioned components, it is possible to input the bridge scour characteristics promptly and accurately during the field survey using commercial communication network (wireless internet, CDMA, etc.) and wireless terminal, and to transmit, receive and manage the data in real time safely. It is possible. It maximizes the function of the bridge scrubbing maintenance system by real-time monitoring to quickly respond to on-site emergencies and to minimize the loss of time and effects over time due to direct and indirect factors.

3 is a flow chart for implementing the bridge scour field survey method.

Figure 3 is a flow chart for implementing a bridge scour field survey method using a commercial communication network and a wireless terminal according to the present invention.

As shown in the figure, a program of a personal portable terminal (hereinafter referred to as a 'PDA terminal') is executed (S1). Then, it communicates with a database (DB) server using a commercial communication network and downloads GIS (Geographic Information System) -based bridge basic information input thereto from the PDA terminal (S2). The site survey priority determined by the bridge scrubbing maintenance system is received from the database server, and the site survey is performed (S3). The PDA terminal stores the field survey data in a file or stores the data in a database server in real time (S4). On-site survey data input to the database server is received from the bridge scrubbing management system for review and analysis, and the analysis results are stored in the database server (S5, S6).

Here, the database server inputs, outputs and manages the field survey and related data, and communicates with the network server and PDA terminal of the GIS-based bridge scrubbing management system to transmit and receive data related to the bridge scour. The database system manages 'bridge foundation information', 'watershed information', and 'floating vessel information' among field survey items of the bridge scrubbing maintenance system, and utilizes photos and video recording and other document editing functions from PDA terminals. It is possible to edit / modify the various materials provided.

4 is a flow chart of a bridge scour field survey system using a PDA.

As shown in the figure, the detailed site survey is conducted based on the survey priority determined through the bridge scrubbing management system, and the site survey is performed by remote connection or local connection within the system according to whether the commercial communication network is accessible (S21). , S22).

If remote access is available, connect to the database server to conduct a search and investigate the scour in the site in detail (S23, S24, S25, S26). At this time, the site survey information is transmitted to and stored in a database server in real time, monitoring is performed in the bridge scrubbing maintenance system (S27). The bridge scrubbing maintenance system checks the results of further investigation and investigation (S28). Finally, the bridge scrubbing maintenance system analyzes the bridge scrubbing data surveyed through its server and stores it in the database server (S29).

In areas where communication networks cannot be used, the bridge survey information is downloaded to the PDA terminal via local access (S31, S32, S33). Then, the field survey is conducted using the PDA terminal and stored as a file (S34, S35). Finally, the data is transmitted to the database server in a remotely accessible area or through indoor work, and the bridge scour data surveyed through the server of the bridge scrubbing maintenance system are analyzed and stored in the database server (S36). , S37).

5 to 17 show exemplary screens showing the entire process of inputting and transmitting information about bridge scour ancestors on a PDA monitor.

Bridge scrubbing management system and bridge scaffold field survey system using PDA terminal are connected to database system server through Server-Client interworking and synchronization system. Field survey system using PDA terminal is connected to commercial communication network system such as wireless internet or CDMA. Run the program with the wireless transmission enabled. In the case of the site where the commercial communication network cannot be connected, the system is operated through the local connection of the PDA terminal to conduct the site survey, store the surveyed information in the device, and transmit and receive data in the accessible area. The site survey through remote access is connected to the database server at the site that can be connected to the commercial communication network, and works with the bridge scrubbing maintenance system through real-time data search and transmission.

5 and 6 show a remote access main menu and a connection execution screen, respectively.

As shown in the figure, the remote access operation is connected to the database system server in the field that can access the commercial communication network and conducts the survey work by receiving the survey priority and basic information of the bridge in real time through data search.

FIG. 7 is a screen showing survey priority information, and FIG. 8 is a screen showing survey data transmission. The PDA terminal receives survey priority and basic information of a bridge to be surveyed from a database server and conducts an investigation. When the investigation is completed, the data is saved and sent to the database system server.

As shown in the input screen of the bridge basic information in Fig. 7 and 8, the input items of the PDA bridge scour field survey system is largely divided into three types of bridge foundation information, watershed information, riverbed information, each database maintains bridge scour It consists of the same items as the management system. Due to the nature of PDA devices with small input screens, the basic and additional items are composed of different screens. For easy input, handwriting and typing of the stylus pen and keyboard input of PDA devices are possible.

FIG. 9 shows a screen for retrieving bridge site information stored in a database server through a remote connection. FIG. 10 shows a screen for storing data and transmitting data to a database server after a field survey is completed.

Fig. 11 shows the main menu screen of the local connection, Fig. 12 is a screen for downloading basic information of the bridge via local connection, and Fig. 13 shows a screen for executing the storage of survey data through the local connection. In the field survey through the bridge scrubbing program entered into the PDA terminal at the site that can not be connected to the commercial communication network receives the basic bridge information and conducts the survey work, and the survey information is stored in the internal storage device of the PDA after the work do.

14 and 15 are exemplary screens of transmission and reception of on-site photographic material, video, and other related data. The PDA terminal includes a function of transmitting and receiving photographs, video, and other related materials on the site. Digital cameras installed in PDA devices are used.

Figure 16 is a screen of the file transmission and confirmation state, Figure 17 is a screen showing the user's environment setting screen, through the file transfer and download function of the PDA terminal received data checked in the field or previously stored data, Can edit and modify In addition, in order to improve user convenience during operation of the program, options such as automatic login, ID storage, password storage, and river line information synchronization, which are frequently used in the system, are set to prevent unnecessary repetitive tasks.

As described above, the bridge scour field survey system using the wireless terminal of the present invention connects to a database system server through a server-client interworking and synchronization system with the bridge scrubbing maintenance system, and establishes a commercial communication network system such as wireless Internet or CDMA. Wireless transmission of information is possible. In addition, within the bridge scrubbing management system, data access and real-time field monitoring of multiple users in a network environment are possible. Through this, the site characteristics can be stored and managed quickly and accurately during the site scrutiny of bridge scrubbing, and real-time monitoring with each bridge manager connected to the server enables emergency response in the field emergency.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a conceptual diagram of a real-time bridge scour field survey system using a wireless terminal according to the present invention.

Figure 2 is a bridge scour maintenance system server-client construction conceptual diagram.

Figure 3 is a flow chart for implementing a bridge scour field survey and maintenance method using a commercial communication network and a wireless terminal according to the present invention.

Figure 4 is a process flow diagram of the bridge scour field survey system using a wireless terminal.

5 to 17 is an exemplary screen showing the entire process of inputting and transmitting information about the bridge scour ancestors on the wireless terminal monitor.

Claims (6)

In the real-time bridge scour field survey system using a commercial communication network and a wireless terminal in the bridge site, A wireless terminal for downloading bridge scrubbing survey information from an external device through a remote connection, storing bridge scrubbing survey data in a file, and transmitting data in real time; Stores the bridge scrubbing field survey data sent from the wireless terminal, and at the client's request, the wireless terminal and the remote terminal through a remote communication using a commercial communication network and network to enable the real-time search and data download of scour information of the bridge to be investigated A database server in communication with the network terminal; And Compare the field survey data related to the bridge scrubbing inputted to the database server with the data previously input in relation to the bridge scrubbing, input a new analysis result into the database server, and confirm the analysis result by the wireless terminal. A network terminal in which a server interoperating with the database server is constructed to complement Bridge scour field survey system using a commercial communication network and a wireless terminal comprising a. The method of claim 1, The network terminal performs input / output and management of bridge scour data, data search and statistical functions, and enables access to multiple users' data and real-time field monitoring in a network environment, using a commercial communication network and a wireless terminal. Scour field survey system. The method according to claim 1 or 2, The wireless terminal screen may include administrator information for storing administrator information and granting access rights to a database server; Survey priority information providing a bridge code, a bridge name, a bridge location, a year of construction, a basic form, a traffic volume, and the like; Bridge basic information for providing a bridge code, a bridge name, a location, a specification, a foundation type, a foundation depth, and the like; Watershed information that provides bridge codes, bridge names, scour design parameters, river specifications, riverbed characteristics, embankment characteristics, and the like; And Riverbed information providing the lateral riverbed of the road where the bridge is located Bridge scour field survey system using a commercial communication network and a wireless terminal, characterized in that consisting of items including. The method according to claim 1 or 2, The database server Bridge detailed information data providing manager information, survey priority information, bridge basic information, watershed information, riverbed information, risk information, and survey history information; And On-site data is provided to provide bridge data, such as soil column tops, photos and videos of bridge sites.  It manages bridge scrubbing information, manages bridge basic information, watershed information, riverbed information, bridge scour field data provided from wireless terminal, compares in real time with the inputted data and checks and complements the new result in real time. Bridge scour field survey system using a commercial communication network and a wireless terminal, characterized in that it can be done. A first step of executing a program of a wireless terminal; A second step of receiving, from the database server, the radio priority terminal for surveying the bridge scrutiny information; A third step of performing a bridge scrubbing site survey by executing a bridge scrubbing spot survey program of a wireless terminal at a bridge site, and transmitting and storing the spot survey data to a database server through a remote connection using a commercial communication network; A fourth step of receiving, from a network terminal, the bridge scour field survey data inputted to the database server, comparing, reviewing and monitoring the previously input data; And A fifth step of confirming and supplementing the result analyzed by the network terminal in a database server; Bridge scour field survey method using a commercial communication network and a wireless terminal comprising a. The method of claim 5, wherein Performing a site scrutiny at a plurality of bridge sites when performing the third step, and performing a site survey by remote connection or local connection in a system according to whether a commercial communication network is accessible; A seventh step of accessing the wireless terminal through a local connection in a region where the commercial communication network is not available, and performing a site scrutiny of the bridge scrubbing using the wireless terminal and storing the file as a file; And Eighth step of transmitting data to a database server in a remotely accessible area or through indoor work and analyzing bridge scrubbing data surveyed through the network terminal Bridge scour field survey method using a commercial communication network and a wireless terminal comprising a.

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