Reinforced concrete panel extrusion damage monitoring system and method
By laying steel bar meter, inclinometer and one-way joint meter in reinforced concrete panels to monitor stress changes and deformation, the problem that existing detection methods cannot accurately reflect the compression failure of the panel, and more accurate panel status monitoring is achieved.
Patent Information
- Application Number
- CN202311575944.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-24
- Publication Date
- 2025-05-27
AI Technical Summary
The existing vertical seams detection methods for reinforced concrete panels cannot accurately reflect the process of compression and damage of the panels, resulting in the inability to accurately grasp the working status of the panels.
By laying a steel bar meter on the steel bars in the concrete panel, an inclinometer is arranged inside the concrete part, and a one-way joint meter is arranged at the joints to monitor the stress changes of the steel bar meter, panel deformation and joint deformation, and comprehensively judge the extrusion status of the compressive joints.
It achieves a more accurate grasp of the working status of the panel, and can promptly determine whether the panel is in the compressed filling material stage, the filling material is compressed to the limit stage or the damage stage, improving the meticulousness and reliability of monitoring.
Smart Images
Figure CN120043569A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of safety monitoring engineering for concrete face rockfill dams, and particularly relates to a monitoring system and method for extrusion failure of reinforced concrete faces. Background Art
[0002] Due to its advantages such as safety, economy, and environmental protection, the concrete face rockfill dam has become one of the most widely used dam types in current water conservancy construction. As the main anti-seepage structure of this type of dam body, the reinforced concrete face is an important guarantee for the safe operation of the dam. A complete and dense concrete face can effectively prevent water flow from seeping in. However, due to the combined effects of design defects, construction quality problems, long-term load effects, deformation of the dam foundation and dam body, environmental erosion and other factors, the anti-seepage face is prone to damage, which not only affects the anti-seepage performance, but may even damage the bearing capacity and durability of the main dam body, endangering the safety of the dam.
[0003] According to the preliminary calculation results such as finite element calculation, the vertical joints of the face are generally divided into compressive joints and tensile joints; in the existing monitoring designs, the monitoring of tensile joints is mostly mentioned in the technical specifications for monitoring earth-rock dams, believing that the monitoring of tensile joints is more important than that of compressive joints. However, for the existing high concrete face rockfill dams at home and abroad, accidents have recently occurred one after another, in which the reservoir leaks seriously due to the extrusion or cracking of the face after impoundment, resulting in compressive joints. The DL / T5259 specification requires that a unidirectional joint meter be installed in the upper-middle part of the compressive joint, and stress and strain monitoring instruments be arranged on both sides of the vertical joint surface of the face if conditions permit. The specification only requires the arrangement of a unidirectional joint meter for the monitoring of compressive joints, and there is no clear requirement for the stress monitoring of compressive joints. From the perspective of some concrete face rockfill dam projects with relatively large compressive deformations or even local damage, the measured values of the joint meter measuring points on the vertical joints of the face change smoothly, and the existing detection of the vertical joints of the face does not reflect the process of the face being compressed and damaged. Therefore, the working state of the face cannot be accurately reflected. Summary of the Invention
[0004] Aiming at the above problems, the purpose of the present invention is to provide a monitoring system and method for extrusion failure of reinforced concrete faces. By arranging reinforcement meters on the steel bars in the concrete face, inclinometers in the concrete at the same position, and unidirectional joint meters at the joints, monitoring the stress changes of the reinforcement meters, the deformation of the face and the deformation of the joints, and comprehensively judging the extrusion state of the compressive joints, so as to more accurately grasp the working state of the face.
[0005] The technical solution of the present invention lies in: a monitoring system for extrusion failure of a reinforced concrete panel, including a plurality of steel bar meters, a plurality of fixed inclinometers, a plurality of unidirectional joint meters, cables, and a data detector. The steel bar meters, fixed inclinometers, and unidirectional joint meters are respectively electrically connected to the data detector through the cables. The steel bar meters are connected to the internal steel bars of the panel within the vertical joints of the reinforced concrete panel. A measuring tube is provided outside the fixed inclinometer, and the measuring tube is embedded in the concrete panel at the location of the steel bar meter. The unidirectional joint meters are arranged along one side or both sides of the joint of the reinforced concrete panel.
[0006] For a reinforced concrete panel with single-layer bidirectional steel bar reinforcement, the steel bar meters are respectively arranged longitudinally and transversely along the internal steel bars of the panel within the vertical joints of the reinforced concrete panel.
[0007] For a reinforced concrete panel with double-layer bidirectional steel bar reinforcement, the steel bar meters are relatively arranged in the upper layer and the lower layer within the vertical joints of the reinforced concrete panel. The steel bar meters are respectively arranged longitudinally and transversely along the internal steel bars of the panel in the upper layer within the vertical joints of the reinforced concrete panel. The steel bar meters are respectively arranged longitudinally and transversely along the internal steel bars of the panel in the lower layer within the vertical joints of the reinforced concrete panel.
[0008] The directions of the steel bar meters arranged longitudinally along the internal steel bars of the panel in the upper layer within the vertical joints of the reinforced concrete panel and the steel bar meters arranged longitudinally along the internal steel bars of the panel in the lower layer within the vertical joints of the reinforced concrete panel are the same. The directions of the steel bar meters arranged transversely along the internal steel bars of the panel in the upper layer within the vertical joints of the reinforced concrete panel and the steel bar meters arranged transversely along the internal steel bars of the panel in the lower layer within the vertical joints of the reinforced concrete panel are the same.
[0009] A measuring tube is provided at the middle position between the steel bar meters relatively arranged in the upper layer and the lower layer within the vertical joints of the reinforced concrete panel, and a fixed inclinometer is provided inside the measuring tube.
[0010] A method for monitoring extrusion failure of a reinforced concrete panel, using the above-mentioned monitoring system for extrusion failure of a reinforced concrete panel, includes the following steps: S1: First, install steel bar meters on the internal steel bars of the panel to be measured. The specific process is as follows: Select steel bar meters of corresponding specifications according to the diameter of the internal steel bars of the panel. Connect the connecting rods at both ends of the steel bar meters to the internal steel bars of the panel respectively. The connection can be carried out by welding or using pipe joints, and the connection strength ≥ the strength of the steel bars. Install and tie the internal steel bars with the steel bar meters, and make the lead-out points of the cables connected to the steel bar meters face downward and be electrically connected to the data detector; S2: Install fixed inclinometers. The specific process is as follows: before installation, check the number and installation position of each fixed inclinometer; check whether the cable length is correct and whether the fixed inclinometer number label is attached to the end of the cable; arrange the fixed inclinometers to be installed in the order of installation, record the serial number and position of each sensor, and place the fixed inclinometers in the inclinometer tube during installation. One set of inclinometer tubes should be perpendicular to the axis of the dam and fixed on the steel bars in the panel, and then fill the inclinometer tubes with M7.5 cement mortar; assemble the fixed inclinometer and the inclinometer tube into a whole, lead the cable out in sections, protect it, and then lead it to the top along the reinforced concrete panel and connect it to the data detector; S3: arranging the one-way joint gauges, the specific process is: using the steel bars in the panel to fix the one-way joint gauges along the designed position of the joints on one side or both sides of the reinforced concrete panel, winding the cables of multiple one-way joint gauges into a bundle, "snaking" along the steel bars in the panel to the top of the reinforced concrete panel, and then connecting them to the data detector through the junction box; S4: Based on the monitoring data collected by the rebar meter, fixed inclinometer and one-way joint meter, let the compression limit of the filling material at the joint of the reinforced concrete panel be a, the one-way joint meter value be b1, the ultimate compression value of the steel bars in the panel be c, the rebar meter value be d1, the maximum calculated deflection of the panel be e, and the fixed inclinometer value be f1, and judge the extrusion damage of the reinforced concrete panel. The judgment process is as follows: When b1 is a negative value and b1<0.8a; d1 is a negative value and d1<0.8c; f1 is a positive value and f1<0.8e, the reinforced concrete panel is in the stage of compressing the filling material and there is no risk of damage; when b1 is a negative value and b1 continues to remain near a, d1 is a negative value and d1 continues to remain near c, f1 is a positive value and f1 continues to remain near e, the reinforced concrete panel is in the stage where the filling material is compressed to the limit; when b1 is a negative value and b1 continues to remain near a or changes suddenly, d1 is a negative value, the d1 data decreases rapidly, f1 is a positive value and f1 continues to remain near e or changes suddenly, the reinforced concrete panel is in the damage stage.
[0011] In step S3, the unidirectional seam meter is pre-stretched to 50% of its measuring range before installation, and the number of cables of the unidirectional seam meter wound into a bundle is ≤3.
[0012] The technical effects of the present invention are as follows: 1. The present invention arranges a rebar gauge on the corner rebar gauge of the concrete panel, arranges a fixed inclinometer inside the concrete at the same position, and arranges a unidirectional joint gauge at the joint. By monitoring the stress change of the rebar gauge, the panel deformation monitoring and the joint deformation monitoring, the extrusion state of the compression joint is comprehensively judged, so as to more accurately grasp the working state of the panel; 2. The monitoring method of the compression deformation of the compression joint of the reinforced concrete panel of the present invention is simple, easy to operate, safe and reliable, and is more detailed, comprehensive and more operational than the current specifications.
[0013] The following will be further described in conjunction with the accompanying drawings. Description of the Drawings
[0014] Figure 1 It is an installation schematic diagram of a monitoring system for extrusion failure of a reinforced concrete face slab according to an embodiment of the present invention.
[0015] Figure 2 It is Figure 1 an enlarged schematic diagram at location A in
[0016] Figure 3 It is Figure 1 the front view in the direction of Ⅰ-Ⅰ in
[0017] Figure 4 It is Figure 3 an enlarged schematic diagram at location B in
[0018] Reference numerals: 1 - rebar meter, 2 - fixed inclinometer, 3 - inclinometer tube, 4 - internal rebar in the face slab, 5 - cable. Detailed Embodiment Embodiment 1
[0019] As Figures 1 to 4 shown, a monitoring system for extrusion failure of a reinforced concrete face slab includes a plurality of rebar meters 1, a plurality of fixed inclinometers 2, a plurality of unidirectional joint meters, a cable 5, and a data detector. The rebar meters 1, the fixed inclinometers 2, and the unidirectional joint meters are respectively electrically connected to the data detector through the cable 5. The rebar meters 1 are connected to the internal rebar 4 in the vertical joints of the reinforced concrete face slab. A inclinometer tube 3 is provided outside the fixed inclinometer 2, and the inclinometer tube 3 is embedded in the concrete face slab at the location of the rebar meter 1. The unidirectional joint meters are arranged along one or both sides of the joints of the reinforced concrete face slab.
[0020] During the actual use process, in the present invention, rebar meters are arranged on the corner rebar meters of the concrete face slab, fixed inclinometers are arranged inside the concrete at the same location, and unidirectional joint meters are arranged at the joints at the same time. By monitoring the stress change of the rebar meters, the deformation of the face slab, and the deformation of the joints, the extrusion state of the compressive joint is comprehensively judged, so as to more accurately master the working state of the face slab. Embodiment 2
[0021] Preferably, on the basis of Embodiment 1, in this embodiment, for a reinforced concrete face slab with single-layer bidirectional reinforcement, the rebar meters 1 are arranged longitudinally and transversely along the internal rebar 4 in the vertical joints of the reinforced concrete face slab respectively.
[0022] During actual use, for the reinforced concrete slab with single-layer and two-way reinforcement in the present invention, the steel strain gauges 1 are arranged longitudinally and transversely along the internal steel bars 4 of the slab within the vertical joints of the reinforced concrete slab, so as to ensure accurate monitoring of the stress changes of the internal steel bars 4 of the slab. Embodiment 3
[0023] Preferably, on the basis of Embodiment 1, in this embodiment, for the reinforced concrete slab with double-layer and two-way reinforcement, the steel strain gauges 1 are arranged oppositely in the upper and lower layers within the vertical joints of the reinforced concrete slab. The steel strain gauges 1 are arranged longitudinally and transversely along the internal steel bars 4 of the upper layer within the vertical joints of the reinforced concrete slab, and the steel strain gauges 1 are arranged longitudinally and transversely along the internal steel bars 4 of the lower layer within the vertical joints of the reinforced concrete slab.
[0024] During actual use, for the reinforced concrete slab with double-layer and two-way reinforcement in the present invention, the steel strain gauges 1 are arranged oppositely in the upper and lower layers within the vertical joints of the reinforced concrete slab, so as to ensure accurate monitoring of the stress changes of the internal steel bars 4 of the slab. Embodiment 4
[0025] Preferably, on the basis of Embodiment 1 or Embodiment 3, in this embodiment, the directions of the steel strain gauges 1 arranged longitudinally along the internal steel bars 4 of the upper layer within the vertical joints of the reinforced concrete slab and the steel strain gauges 1 arranged longitudinally along the internal steel bars 4 of the lower layer within the vertical joints of the reinforced concrete slab are the same, and the directions of the steel strain gauges 1 arranged transversely along the internal steel bars 4 of the upper layer within the vertical joints of the reinforced concrete slab and the steel strain gauges 1 arranged transversely along the internal steel bars 4 of the lower layer within the vertical joints of the reinforced concrete slab are the same.
[0026] During actual use, in the present invention, the directions of the steel strain gauges 1 arranged longitudinally along the internal steel bars 4 of the upper layer within the vertical joints of the reinforced concrete slab and the steel strain gauges 1 arranged longitudinally along the internal steel bars 4 of the lower layer within the vertical joints of the reinforced concrete slab are the same, and the directions of the steel strain gauges 1 arranged transversely along the internal steel bars 4 of the upper layer within the vertical joints of the reinforced concrete slab and the steel strain gauges 1 arranged transversely along the internal steel bars 4 of the lower layer within the vertical joints of the reinforced concrete slab are the same, ensuring accurate monitoring of the stress changes of the internal steel bars 4 of the slab. Embodiment 5
[0027] Preferably, on the basis of Embodiment 1 or Embodiment 4, an inclinometer tube 3 is provided at the middle position between the steel strain gauges 1 arranged oppositely in the upper and lower layers within the vertical joints of the reinforced concrete slab, and a fixed inclinometer 2 is provided inside the inclinometer tube 3.
[0028] During actual use, the present invention provides an inclinometer tube 3 at the middle position between the upper and lower layers of the vertical joint of the reinforced concrete panel and the relatively arranged steel bars 1, wherein the inclinometer tube 3 is provided with a fixed inclinometer 2, thereby ensuring accurate monitoring of panel deformation. Example 6
[0029] A reinforced concrete panel extrusion damage monitoring method, using the reinforced concrete panel extrusion damage monitoring system as described above, comprises the following steps: S1: First, the steel bar meter 1 is arranged and installed on the steel bar 4 in the panel to be tested. The specific process is: the steel bar meter 1 of the corresponding specification is selected according to the diameter of the steel bar 4 in the panel, the connecting rods at both ends of the steel bar meter 1 are respectively connected to the steel bar 4 in the panel, the connection can be welded or pipe joints, the connection strength is ≥ the strength of the steel bar, the steel bar 4 in the panel with the steel bar meter 1 is installed and tied, the lead-out point of the cable 5 connected to the steel bar meter 1 is downward, and it is electrically connected to the data detector; S2: Lay out the fixed inclinometer 2. The specific process is as follows: before installation, check the number and installation position of each fixed inclinometer 2; check whether the length of the cable 5 is correct and whether the fixed inclinometer 2 number label is attached to the end of the cable 5; arrange the fixed inclinometers 2 to be installed in the order of installation, record the serial number and position of each sensor, put the fixed inclinometer 2 into the inclinometer tube 3 during installation, one group of inclinometer tubes 3 should be perpendicular to the axis of the dam and fixed on the steel bars 4 in the panel, and then fill the inclinometer tube 3 with M7.5 cement mortar; assemble the fixed inclinometer 2 and the inclinometer tube 3 into a whole, lead the cable 5 out in sections, protect it, lead it to the top along the reinforced concrete panel and connect it to the data detector; S3: Laying out the one-way seam gauges, the specific process is: using the steel bars 4 in the panel to fix the one-way seam gauges along the designed position of the seams on one side or both sides of the reinforced concrete panel, winding the cables 5 of multiple one-way seam gauges into a bundle, "snaking" along the steel bars 4 in the panel to the top of the reinforced concrete panel, and then connecting them to the data detector through the junction box; S4: Based on the monitoring data collected by the steel bar meter 1, the fixed inclinometer 2 and the one-way joint meter, the compression limit of the filling material at the joint of the reinforced concrete panel is set to a, the value measured by the one-way joint meter is b1, the ultimate compression value of the steel bar 4 in the panel is c, the value measured by the steel bar meter 1 is d1, the maximum calculated deflection of the panel is e, and the value measured by the fixed inclinometer 2 is f1. The extrusion damage of the reinforced concrete panel is judged. The judgment process is as follows: When b1 is negative and b1 < 0.8a; d1 is negative and d1 < 0.8c; f1 is positive and f1 < 0.8e; at this time, the reinforced concrete panel is in the stage of compressing the filling material and there is no risk of damage; when b1 is negative and b1 continuously remains near a, d1 is negative and d1 continuously remains near c, f1 is positive and f1 continuously remains near e, at this time, the reinforced concrete panel is in the stage where the filling material is compressed to the limit; when b1 is negative and b1 continuously remains near a or undergoes a mutation, d1 is negative and the value of d1 rapidly decreases, f1 is positive and f1 continuously remains near e or undergoes a mutation, at this time, the reinforced concrete panel is in the damaged stage.
[0030] In the step S3, before installation, 50% of the pre-tensioning range of the unidirectional joint meter is pulled, and the number of cables 5 of the unidirectional joint meters wound into a bundle ≤ 3.
[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. A reinforced concrete panel extrusion damage monitoring system, Features: The invention comprises a plurality of rebar meters (1), a plurality of fixed inclinometers (2), a plurality of unidirectional joint meters, cables (5) and a data detector, wherein the rebar meters (1), the fixed inclinometers (2) and the unidirectional joint meters are electrically connected to the data detector via the cables (5), respectively; the rebar meters (1) are connected to the steel bars (4) in the vertical joints of the reinforced concrete panel; an inclinometer tube (3) is provided outside the fixed inclinometer (2); the inclinometer tube (3) is pre-buried in the concrete panel at the rebar meters (1); and the unidirectional joint meters are arranged along the joints on one side or both sides of the reinforced concrete panel.
2. According to the reinforced concrete panel extrusion damage monitoring system of claim 1, Features: For a single-layer bidirectionally reinforced reinforced concrete panel, the steel bar gauge (1) is arranged along the longitudinal direction and the transverse direction of the steel bars (4) in the panel in the vertical seam of the reinforced concrete panel.
3. According to the reinforced concrete panel compression damage monitoring system of claim 1, Features: For a double-layer bidirectionally reinforced reinforced concrete panel, the steel bar gauge (1) is arranged relatively to each other in the upper layer and the lower layer in the vertical joint of the reinforced concrete panel, the steel bar gauge (1) is arranged along the longitudinal direction and the transverse direction of the steel bars (4) in the upper layer in the vertical joint of the reinforced concrete panel, and the steel bar gauge (1) is arranged along the longitudinal direction and the transverse direction of the steel bars (4) in the lower layer in the vertical joint of the reinforced concrete panel.
4. According to claim 3, a reinforced concrete panel crushing damage monitoring system, Features: The steel bar meter (1) arranged longitudinally along the upper layer of the panel steel bars (4) in the vertical seam of the reinforced concrete panel and the steel bar meter (1) arranged longitudinally along the lower layer of the panel steel bars (4) in the vertical seam of the reinforced concrete panel have the same direction, and the steel bar meter (1) arranged transversely along the upper layer of the panel steel bars (4) in the vertical seam of the reinforced concrete panel and the steel bar meter (1) arranged transversely along the lower layer of the panel steel bars (4) in the vertical seam of the reinforced concrete panel have the same direction.
5. According to claim 3, a reinforced concrete panel compression damage monitoring system, Features: An inclinometer tube (3) is provided at a middle position between the upper and lower layers of relatively arranged steel bars (1) in a vertical joint of a reinforced concrete panel, and a fixed inclinometer (2) is provided in the inclinometer tube (3).
6. A reinforced concrete panel extrusion damage monitoring method, using a reinforced concrete panel extrusion damage monitoring system as claimed in claim 1, Features: The following steps are involved: S1: First, a steel bar meter (1) is arranged and installed on the steel bars (4) in the panel to be tested. The specific process is as follows: a steel bar meter (1) of corresponding specifications is selected according to the diameter of the steel bars (4) in the panel, the connecting rods at both ends of the steel bar meter (1) are respectively connected to the steel bars (4) in the panel, the connection can be made by welding or pipe joints, and the connection strength is ≥ the strength of the steel bar, the steel bars (4) in the panel with the steel bar meter (1) are installed and tied, the lead-out point of the cable (5) connected to the steel bar meter (1) is facing downward, and it is electrically connected to the data detector; S2: Arrange the fixed inclinometers (2). The specific process is as follows: before installation, check the number and installation position of each fixed inclinometer (2); check whether the length of the cable (5) is correct and whether the fixed inclinometer (2) number label is attached to the end of the cable (5); arrange the fixed inclinometers (2) to be installed in the order of installation, record the serial number and position of each sensor, and place the fixed inclinometers (2) into the inclinometer tubes (3) during installation. One set of inclinometer tubes (3) should be perpendicular to the dam axis and fixed on the steel bars (4) inside the panel. Then, fill the inclinometer tubes (3) with M7.5 cement mortar; assemble the fixed inclinometer (2) and the inclinometer tubes (3) into a whole. The cables (5) are led out in sections, protected, and then led along the reinforced concrete panel to the top and connected to the data detector; S3: Arrangement of unidirectional joint gauges, the specific process is: using the steel bars (4) in the panel to fix the unidirectional joint gauges along the designed position of the joints on one side or both sides of the reinforced concrete panel, winding the cables (5) of multiple unidirectional joint gauges into a bundle, "snaking" along the steel bars (4) in the panel to the top of the reinforced concrete panel, and then connecting them to the data detector through the junction box; S4: Based on the monitoring data collected by the steel bar meter (1), the fixed inclinometer (2) and the one-way joint meter, the compression limit of the filling material at the joint of the reinforced concrete panel is set to a, the value measured by the one-way joint meter is set to b1, the ultimate compressive value of the steel bar (4) in the panel is set to c, the value measured by the steel bar meter (1) is set to d1, the maximum calculated deflection of the panel is set to e, and the value measured by the fixed inclinometer (2) is set to f1. The extrusion failure of the reinforced concrete panel is judged. The judgment process is as follows: When b1 is a negative value and b1<0.8a; d1 is a negative value and d1<0.8c; f1 is a positive value and f1<0.8e; at this time, the reinforced concrete panel is in the stage of compressing the filling material and there is no risk of damage; when b1 is a negative value and b1 continues to remain near a, d1 is a negative value and d1 continues to remain near c, f1 is a positive value and f1 continues to remain near e, at this time, the reinforced concrete panel is in the stage where the filling material is compressed to the limit; when b1 is a negative value and b1 continues to remain near a or mutates, d1 is a negative value, the d1 data decreases rapidly, f1 is a positive value and f1 continues to remain near e or mutates, at this time, the reinforced concrete panel is in the damage stage.
7. A reinforced concrete panel extrusion failure monitoring method according to claim 6, Features: In step S3, the one-way seam meter is pre-stretched to 50% of its measuring range before installation, and the number of cables (5) of the one-way seam meter wound into a bundle is ≤3.