A method for detecting the staggered length of vertical steel bar joints

Abstract

The present application provides a method for detecting the staggered length of vertical steel bar joints, which relates to the technical field of tunnel lining construction. A detection device is used for detection. The detection device includes a first detection tube and a second detection tube that are connected to each other and have parallel axes. The first detection tube and the second detection tube are both transparent tubes. The first detection tube is higher than the second detection tube. The vertical steel bars include first and second steel bars that are arranged side by side. The detection method includes: putting the first detection tube on the first steel bar and putting the second detection tube on the second steel bar; according to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, the detection result of the staggered length of the joint of the first steel bar and the joint of the second steel bar is obtained. Through this detection method, the staggered length of the joint of the vertical steel bar can be quickly detected, the detection efficiency is improved, and it is conducive to accelerating the construction progress.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel lining construction, and in particular to a method for detecting the staggered length of vertical steel bar joints. Background Art

[0002] Tunnel lining is a permanent support structure constructed of concrete, reinforced concrete, or other materials along the tunnel perimeter. It supports the surrounding rock, prevents collapse, and ensures the tunnel's functionality. The steel cage, a component of the tunnel lining, includes vertical and transverse reinforcement. The vertical reinforcement supports the structure's vertical loads and bending moments, enhances its integrity and shear resistance, and controls crack development and durability. A vertical reinforcement joint refers to the longitudinal connection between two adjacent vertical bars. A vertical reinforcement joint is the end of a vertical bar, formed into a single unit through specific processes (such as tying, welding, or mechanical connection) to enable the vertical bars to share the load. To prevent stress concentration caused by an excessive number of vertical reinforcement joints within a single cross-section, relevant specifications require that the cross-sectional area of ​​vertical reinforcement joints within a single cross-section must not exceed 50% of the total cross-sectional area of ​​the reinforcement, and that the staggered length of the joints must be at least 35 times the bar diameter.

[0003] The detection of the staggered length of vertical steel bar joints is involved in multiple links in the construction process. The traditional method is to manually measure with a ruler to determine whether the staggered length of the vertical steel bar joints meets the requirements. However, the method of manually using a ruler to determine whether the staggered length meets the requirements is inefficient and is not conducive to speeding up the construction progress. Summary of the Invention

[0004] The present application provides a method for detecting the staggered length of vertical steel bar joints, which can quickly detect the staggered length of vertical steel bar joints, improve detection efficiency, and help speed up construction progress.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] The present application provides a method for detecting the staggered length of a vertical steel bar joint, using a detection device for detection, the detection device comprising a first detection tube and a second detection tube connected to each other and having parallel axes, the first detection tube and the second detection tube both being transparent tubes, the first detection tube being higher than the second detection tube, and the vertical steel bar comprising a first steel bar and a second steel bar arranged side by side; the detection method comprising:

[0007] Putting the first detection tube on the first steel bar and putting the second detection tube on the second steel bar;

[0008] According to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, a detection result of the staggered length of the joint of the first steel bar and the joint of the second steel bar is obtained.

[0009] Optionally, obtaining a detection result of a staggered length of a joint of the first steel bar and a joint of the second steel bar according to a position of the first steel bar in the first detection tube and a position of the second steel bar in the second detection tube includes:

[0010] If the joint of the first steel bar contacts the top of the first detection tube and the joint of the second steel bar contacts the top of the second detection tube, a detection result is obtained indicating that the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirement;

[0011] If the joint of the first steel bar contacts the top of the first detection tube and the joint of the second steel bar is spaced from the top of the second detection tube, the detection result is obtained that the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0012] Optionally, obtaining a detection result of a staggered length of a joint of the first steel bar and a joint of the second steel bar according to a position of the first steel bar in the first detection tube and a position of the second steel bar in the second detection tube includes:

[0013] If there is a gap between the joint of the first steel bar and the top of the first detection tube, and the joint of the second steel bar contacts the top of the second detection tube, the staggered length between the joint of the first steel bar and the joint of the second steel bar does not meet the requirement.

[0014] Optionally, the vertical steel bars include a first type of steel bars and a second type of steel bars, and the diameter of the first type of steel bars is smaller than that of the second type of steel bars; the first detection tube includes a first tube section and a second tube section, one end of the second tube section is sleeved in the first tube section, the inner wall of the first tube section is provided with a limiting step, the second tube section is provided with an elastic locking structure, and the first tube section is provided with a locking hole; when the bottom of the second tube section abuts against the limiting step of the first tube section, the first detection tube is in a first state; when the elastic locking structure of the second tube section is engaged with the locking hole of the first tube section, the first detection tube is in a second state;

[0015] Said putting the first detection tube on the first steel bar comprises:

[0016] If the first steel bar is a first type steel bar, the first detection tube in the first state is placed on the first type steel bar;

[0017] If the first steel bar is a second type of steel bar, the first detection tube in the second state is put on the second type of steel bar.

[0018] Optionally, the detection device further includes a laser rangefinder, the first detection tube includes a tube body and a cover plate, the cover plate is fixed to one end of the tube body, the laser rangefinder is mounted on the outer side of the cover plate, and the cover plate is provided with a through hole for laser emitted by the laser rangefinder to pass through;

[0019] Obtaining a detection result of a staggered length between a joint of the first steel bar and a joint of the second steel bar according to a position of the first steel bar in the first detection tube and a position of the second steel bar in the second detection tube, including:

[0020] If there is a gap between the joint of the first steel bar and the top of the first detection tube, the distance between the joint of the first steel bar and the top of the first detection tube is obtained by the laser rangefinder.

[0021] Optionally, the detection device further includes an indicator light and a contact sensor connected to each other, the indicator light is arranged on the outside of the first detection tube, and the contact sensor is arranged on the inside of the top of the first detection tube; when there is a gap between the joint of the first steel bar and the contact sensor, the indicator light is off; when the joint of the first steel bar is in contact with the contact sensor, the indicator light is on;

[0022] Obtaining a detection result of a staggered length between a joint of the first steel bar and a joint of the second steel bar according to a position of the first steel bar in the first detection tube and a position of the second steel bar in the second detection tube, including:

[0023] If the indicator light is on, the detection result is that the staggered length of the joint of the first steel bar and the second steel bar meets the requirements; if the indicator light is off, the detection result is that the staggered length of the joint of the first steel bar and the second steel bar does not meet the requirements.

[0024] Optionally, the first detection tube and the second detection tube are connected by a connecting beam, the connecting beam comprising a first beam section and a second beam section, one end of the first beam section being sleeved within the second beam section, the first detection tube being connected to an end of the first beam section away from the second beam section, and the second detection tube being connected to an end of the second beam section away from the first beam section;

[0025] Before putting the first detection tube on the first steel bar and putting the second detection tube on the second steel bar, the detection method includes:

[0026] The length of the first beam section within the second beam section is adjusted according to the transverse distance between the first steel bar and the second steel bar, so that the first detection tube and the second detection tube are aligned with the first steel bar and the second steel bar respectively.

[0027] Optionally, the first detection tube and the second detection tube are connected by a connecting beam, and the two ends of the connecting beam are respectively provided with a first clamping portion and a second clamping portion, the first detection tube is provided with a first clamping fitting portion, and the second detection tube is provided with a second clamping fitting portion; before the first detection tube is sleeved on the first steel bar and the second detection tube is sleeved on the second steel bar, the detection method includes:

[0028] Engage the first clamping portion of the first detection tube with the first clamping portion at one end of the connecting beam;

[0029] The second clamping portion of the second detection tube is engaged with the second clamping portion at the other end of the connecting beam.

[0030] It can be seen from the above technical solution that this application has at least the following beneficial effects:

[0031] The embodiment of the present application provides a method for detecting the staggered length of vertical steel bar joints, which uses a detection device for detection. The detection device includes a first detection tube and a second detection tube that are connected to each other and have parallel axes. The first detection tube and the second detection tube are both transparent tubes. The first detection tube is higher than the second detection tube. The vertical steel bars include adjacent first and second steel bars. By putting the first detection tube on the first steel bar and the second detection tube on the second steel bar, according to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, it can be determined whether the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements, thereby realizing rapid detection of the staggered length of the vertical steel bar joints, improving detection efficiency, and helping to speed up construction progress.

[0032] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of a detection device provided in this application in a specific embodiment;

[0034] Figure 2 A flow chart of a method for detecting the staggered length of vertical steel bar joints provided in an embodiment of the present application;

[0035] Figure 3 A cross-sectional view of a first pipe segment and a second pipe segment provided in the present application in a specific embodiment;

[0036] Figure 4 A schematic diagram of a snap-on button and an elastic member provided in this application in a specific embodiment;

[0037] Figure 5 This is a schematic diagram of the first beam section provided in this application in a specific embodiment.

[0038] Figure markings: 1-first detection tube; 11-first tube section; 12-second tube section; 13-third tube section; 14-fourth tube section; 15-limiting step; 16-first snap-fitting portion; 2-second detection tube; 21-second snap-fitting portion; 31-snap-fitting button; 32-elastic member; 4-laser rangefinder; 5-connecting beam; 51-first beam section; 52-second beam section; 53-limiting plate; 54-first snap-fitting portion; 55-second snap-fitting portion. DETAILED DESCRIPTION

[0039] The terms "first", "second" and "third" in this application specification and the accompanying drawings are used to distinguish different objects rather than to limit a specific order.

[0040] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0041] To make the description of the following embodiments clear and concise, a brief introduction to the related technologies is first given:

[0042] Tunnel lining is a permanent support structure constructed of concrete, reinforced concrete, or other materials along the tunnel perimeter. It supports the surrounding rock, prevents collapse, and ensures the tunnel's functionality. Tunnel linings provide mechanical support, resisting loads such as surrounding rock pressure, earth pressure, and seismic forces to maintain tunnel structural stability. They also provide waterproofing and anti-seepage protection, isolating groundwater from seepage and preventing structural leakage that could impact operational safety. They also ensure durability, protecting the surrounding rock from weathering and erosion, extending the tunnel's service life. Furthermore, they optimize functionality by providing a smooth interior wall to facilitate ventilation, lighting, pipeline routing, and train traffic.

[0043] The steel cage is an integral component of the tunnel lining and includes vertical and transverse reinforcement. The vertical reinforcement serves the following functions: bearing the structural vertical loads and bending moments, enhancing structural integrity and shear resistance, and controlling crack development and durability. For example, vertical reinforcement is installed in the side walls to withstand the combined effects of lateral and vertical pressure. The vertical reinforcement counteracts the bending moments caused by eccentric compression. This is particularly true in shallow tunnels or areas with eccentric pressure, where the density of vertical reinforcement in the side walls is typically high.

[0044] A vertical rebar joint refers to the connection between two adjacent vertical rebars along their length. This refers to the end of a vertical rebar joint, formed into a single piece through specific processes (such as binding, welding, or mechanical connection), allowing the vertical rebar to jointly bear the load. To prevent stress concentration caused by an excessive number of vertical rebar joints in the same section, relevant specifications require that the cross-sectional area of ​​vertical rebar joints in the same section must not exceed 50% of the total rebar cross-sectional area, and that the staggered length of the joints must be at least 35 times the rebar diameter. When testing the staggered length of vertical rebar joints, the top of the vertical rebar should be exposed, and the staggered length of the top of the vertical rebar should be tested.

[0045] Therefore, in tunnel lining construction, the staggered length detection of vertical steel bar joints is an important link to ensure the structural stress performance and construction quality.

[0046] The detection of the staggered length of vertical steel bar joints is involved in multiple links in the construction process. For example, in the process of daily construction quality inspection, in order to promptly discover the insufficient staggered length caused by workers' operational errors, corresponding spot checks are carried out; in the hidden project acceptance stage, when the vertical steel bars are installed and before the concrete is poured, a comprehensive detection of the staggered length of the vertical steel bar joints is required; and during the quality acceptance of sub-projects, after the tunnel lining steel bar sub-project is completed, before the concrete sub-project is constructed, the staggered length of the vertical steel bar joints is detected.

[0047] The traditional method is to manually measure with a ruler to determine whether the staggered length of the vertical steel bar joints meets the requirements. However, the method of manually using a ruler to determine whether the staggered length meets the requirements is inefficient and is not conducive to speeding up the construction progress.

[0048] In view of this, an embodiment of the present application provides a method for detecting the staggered length of vertical steel bar joints, which is detected using a detection device. The detection device includes a first detection tube and a second detection tube that are connected to each other and have parallel axes. The first detection tube and the second detection tube are both transparent tubes. The first detection tube is higher than the second detection tube. The vertical steel bars include adjacent first and second steel bars. By putting the first detection tube on the first steel bar and the second detection tube on the second steel bar, according to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, it can be determined whether the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements, thereby realizing rapid detection of the staggered length of the joints of the vertical steel bars, improving detection efficiency, and helping to speed up construction progress.

[0049] The following describes the method for detecting the staggered length of vertical steel bar joints provided in the embodiment of the present application in conjunction with the accompanying drawings:

[0050] like Figure 1 As shown, the detection device includes a first detection tube 1 and a second detection tube 2 connected to each other with parallel axes. Both the first detection tube 1 and the second detection tube 2 are transparent tubes. Each of the first detection tube 1 and the second detection tube 2 has an open end and a closed end. The first detection tube 1 and the second detection tube 2 can both be made of polyvinyl chloride, which has high transparency, is easy to manufacture, and has low cost. Alternatively, the first detection tube 1 and the second detection tube 2 can be made of polycarbonate.

[0051] The vertical steel bars include a first steel bar and a second steel bar arranged side by side, and the height of the first steel bar is greater than that of the second steel bar.

[0052] like Figure 2 As shown, the detection method includes:

[0053] S1. Put the first detection tube 1 on the first steel bar, and put the second detection tube 2 on the second steel bar.

[0054] S2. According to the position of the first steel bar in the first detection tube 1 and the position of the second steel bar in the second detection tube 2, a detection result of the staggered length of the joint of the first steel bar and the joint of the second steel bar is obtained.

[0055] During the inspection, the inspector uses the inspection device to inspect the staggered length of the first steel bar and the second steel bar placed side by side. The inspector puts the first inspection tube 1 on the first steel bar and the second inspection tube 2 on the second steel bar. After the installation is completed, the inspector can directly observe the position of the first steel bar in the first inspection tube 1 and the position of the second steel bar in the second inspection tube 2 to determine whether the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0056] Specifically, according to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, a detection result of the staggered length of the joint of the first steel bar and the joint of the second steel bar is obtained, including:

[0057] If the joint of the first steel bar contacts the top of the first detection tube 1 and the joint of the second steel bar contacts the top of the second detection tube 2, the detection result is obtained that the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0058] If the joint of the first steel bar contacts the top of the first detection tube 1 and the joint of the second steel bar is spaced from the top of the second detection tube 2, the detection result is obtained that the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0059] If there is a gap between the joint of the first steel bar and the top of the first detection tube 1, and the joint of the second steel bar contacts the top of the second detection tube 2, the detection result is that the staggered length of the joint of the first steel bar and the joint of the second steel bar does not meet the requirements.

[0060] In a specific embodiment, the height difference between the first detection tube 1 and the second detection tube 2 can be 35 D, where D is the diameter of the vertical reinforcement.

[0061] If the joint of the first steel bar contacts the top of the first detection tube 1 and the joint of the second steel bar contacts the top of the second detection tube 2, the detection result is: the staggered length of the joint of the first steel bar and the joint of the second steel bar is 35 D. The staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0062] If the joint of the first steel bar contacts the top of the first detection tube 1, and there is a gap between the joint of the second steel bar and the top of the second detection tube 2, the test result is: the offset length between the joint of the first steel bar and the joint of the second steel bar is greater than 35 D. The staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements.

[0063] If there is a gap between the joint of the first steel bar and the top of the first detection tube 1, and the joint of the second steel bar contacts the top of the second detection tube 2, the test result is: the gap between the joint of the first steel bar and the joint of the second steel bar is less than 35 D. The staggered length between the joint of the first steel bar and the joint of the second steel bar does not meet the requirements.

[0064] The method for detecting the staggered length of vertical steel bars provided in this embodiment is to place the first detection tube 1 of the detection device on the first steel bar and the second detection tube 2 on the second steel bar. According to the position of the first steel bar in the first detection tube and the position of the second steel bar in the second detection tube, it can be determined whether the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements, thereby realizing rapid detection of the staggered length of the joint of the vertical steel bars, improving detection efficiency, and facilitating accelerated construction progress.

[0065] In a specific embodiment, the vertical steel bars include first-type steel bars and second-type steel bars, the diameter of the first-type steel bars is D1, and the diameter of the second-type steel bars is D2.

[0066] like Figure 1 and Figure 3 As shown, the first detection tube 1 includes a first tube section 11 and a second tube section 12. One end of the second tube section 12 is sleeved in the first tube section 11. The inner wall of the first tube section 11 is provided with a limiting step 15. The second tube section 12 is provided with an elastic locking structure, and the first tube section 11 is provided with a locking hole. When the bottom of the second tube section 12 abuts against the limiting step 15 of the first tube section 11, the first detection tube 1 is in the first state. The height difference between the first detection tube 1 and the second detection tube 2 in the first state is 35 D1; when the elastic engaging structure of the second tube section 12 is engaged with the card hole of the first tube section 11, the first detection tube 1 is in the second state, and the height difference between the first detection tube 1 and the second detection tube 2 in the second state is 35 D2.

[0067] Among them, putting the first detection tube 1 on the first steel bar includes: if the first steel bar is a first type of steel bar, putting the first detection tube 1 in the first state on the first type of steel bar; if the first steel bar is a second type of steel bar, switching the first detection tube 1 from the first state to the second state, and putting the first detection tube 1 in the second state on the second type of steel bar.

[0068] Specifically, if Figure 4 As shown, the elastic engaging structure includes a snap button 31 and an elastic member 32. The snap button 31 is sleeved within the sleeve of the second pipe section 12 and connected to the inner wall of the sleeve via the elastic member 32. When the second pipe section 12 is removed from the first pipe section 11, when the snap button 31 aligns with the snap hole, the elastic restoring force of the elastic member 32 causes the snap button 31 to snap into engagement with the snap hole.

[0069] In a specific embodiment, the diameter of the first type of steel bar D1 = 18 mm, the diameter of the second type of steel bar D2 = 20 mm, the first detection tube 1 in the first state corresponds to the detection of vertical steel bars with a diameter of 18 mm, and the first detection tube 1 in the second state corresponds to the detection of vertical steel bars with a diameter of 20 mm.

[0070] The inner diameter of the first tube section 11 is 35 mm. When the first detection tube 1 is in the first state, the distance between the top of the second tube section 12 and the bottom of the first tube section 11 is 830 mm. When the first detection tube 1 is in the second state, the distance between the top of the second tube section 12 and the bottom of the first tube section 11 is 900 mm. The inner diameter of the second detection tube 2 is 35 mm, the height of the second detection tube 2 is 200 mm, and the inner diameter of the second detection tube 2 is 35 mm.

[0071] When the first detection tube 1 is in the first state, the height difference between the first detection tube 1 and the second detection tube 2 is 830-200=630mm; 35 times the diameter of the vertical steel bar with a diameter of 18mm is 35 18=630mm; that is, the height difference between the first detection tube 1 and the second detection tube 2 in the first state is equal to 35 times the diameter of the vertical steel bar with a diameter of 18mm.

[0072] When the first detection tube 1 is in the second state, the height difference between the first detection tube 1 and the second detection tube 2 is 900-200=700mm; 35 times the diameter of the vertical steel bar with a diameter of 20mm is 35 20=700mm; that is, the height difference between the first detection tube 1 and the second detection tube 2 in the first state is equal to 35 times the diameter of the vertical steel bar with a diameter of 20mm.

[0073] When inspecting vertical steel bars with a diameter of 18 mm, the inspector puts the first inspection tube 1 in the first state, and respectively puts the first inspection tube 1 and the second inspection tube 2 in the first state on the first steel bar and the second steel bar, and observes the positions of the first steel bar and the second steel bar in the first inspection tube 1 and the second inspection tube 2; if the top of the first steel bar contacts the top of the second pipe section 12, and the top of the second steel bar contacts the top of the second inspection tube 2, then the staggered length of the first steel bar and the second steel bar with a diameter of 18 mm meets the requirements; if the top of the first steel bar contacts the top of the second pipe section 12, and there is a gap between the top of the second steel bar and the top of the second inspection tube 2, then the staggered length of the first steel bar and the second steel bar with a diameter of 18 mm meets the requirements; if there is a gap between the top of the first steel bar and the top of the second pipe section 12, and the top of the second steel bar contacts the top of the second inspection tube 2, then the staggered length of the first steel bar and the second steel bar with a diameter of 18 mm does not meet the requirements.

[0074] When testing vertical rebar with a diameter of 20 mm, the inspector switches the first inspection tube 1 from the first state to the second state, that is, pulls out the second tube section 12 until the elastic engagement structure of the second tube section 12 engages with the engagement hole of the first tube section 11. Testing whether the staggered length of a vertical rebar with a diameter of 20 mm meets the requirements is similar to the method for testing the staggered length of a vertical rebar with a diameter of 18 mm.

[0075] like Figure 1 As shown, the first detection tube 1 includes a first tube section 11, a second tube section 12, a third tube section 13 and a fourth tube section 14. One end of the fourth tube section 14 is sleeved in the third tube section 13, one end of the third tube section 13 is sleeved in the second tube section 12, and one end of the second tube section 12 is sleeved in the first tube section 11; the inner walls of the first tube section 11, the inner walls of the second tube section 12 and the inner walls of the third tube section 13 are respectively provided with limiting steps 15 to prevent the second tube section 12, the third tube section 13 and the fourth tube section 14 from falling off; the second tube section 12, the third tube section 13 and the fourth tube section 14 are respectively provided with elastic locking structures, and the first tube section 11, the second tube section 12 and the third tube section 13 are respectively provided with locking holes to ensure that the second tube section 12, the third tube section 13 and the fourth tube section 14 are in a fixed state after being pulled out. Figure 1 The first detection tube 1 shown can detect four vertical steel bars of different diameters and has strong adaptability.

[0076] In this embodiment, the first detection tube 1 has at least two tube sections to detect vertical steel bars of different diameters, thereby improving the adaptability of the detection device.

[0077] In a specific embodiment, the detection device also includes a laser rangefinder 4. The first detection tube 1 has a tube body and a cover plate. The cover plate is fixed to one end of the tube body. The laser rangefinder 4 is installed on the outside of the cover plate. The cover plate is provided with a through hole for the laser emitted by the laser rangefinder 4 to pass through.

[0078] Based on the position of the first steel bar in the first detection tube 1 and the position of the second steel bar in the second detection tube 2, the detection result of the staggered length of the joint of the first steel bar and the joint of the second steel bar is obtained, including: if there is a gap between the joint of the first steel bar and the top of the first detection tube 1, the distance between the joint of the first steel bar and the top of the first detection tube 1 is obtained by the laser rangefinder 4.

[0079] If there is a gap between the joint of the first steel bar and the top of the first detection tube 1, the detection result is: the staggered length between the joint of the first steel bar and the joint of the second steel bar is less than 35 D, the staggered length of the joint of the first steel bar and the joint of the second steel bar does not meet the requirement. At this time, the distance between the joint of the first steel bar and the top of the first detection tube 1 is obtained by the laser rangefinder 4.

[0080] The distance between the joint of the first steel bar and the top of the first detection tube 1 is L, and the offset length between the joint of the first steel bar and the joint of the second steel bar is H, H=35 DL.

[0081] In this embodiment, through the setting of the laser rangefinder 4, when the staggered length of the joint of the first steel bar and the joint of the second steel bar does not meet the requirements, the staggered length of the joint of the first steel bar and the second steel bar can be obtained without manual measurement with a ruler, thereby improving the detection efficiency.

[0082] Specifically, the laser rangefinder 4 is provided with a display screen, through which the inspector can obtain the distance between the joint of the first steel bar and the top of the first detection tube 1. Alternatively, the laser rangefinder 4 is connected to a handheld terminal via a data cable, and the inspector obtains the distance between the joint of the first steel bar and the top of the first detection tube 1 through the display screen provided on the handheld terminal. The control module of the handheld terminal calculates the offset length between the joint of the first steel bar and the joint of the second steel bar, and the offset length between the joint of the first steel bar and the joint of the second steel bar is also displayed on the display screen.

[0083] In a specific embodiment, the detection device also includes an indicator light and a contact sensor that are connected to each other. The indicator light is arranged on the outside of the first detection tube 1, and the contact sensor is arranged on the inside of the top of the first detection tube 1; when there is a gap between the joint of the first steel bar and the contact sensor, the indicator light is in an off state; when the joint of the first steel bar is in contact with the contact sensor, the indicator light is in a lit state.

[0084] According to the position of the first steel bar in the first detection tube 1 and the position of the second steel bar in the second detection tube 2, the detection result of the staggered length of the joint of the first steel bar and the second steel bar is obtained, including: if the indicator light is in the on state, the detection result is obtained that the staggered length of the joint of the first steel bar and the second steel bar meets the requirements; if the indicator light is in the off state, the detection result is obtained that the staggered length of the joint of the first steel bar and the second steel bar does not meet the requirements.

[0085] Specifically, the detection device also includes a single-chip microcomputer (MCU) mounted on the first detection tube 1. The MCU is used to turn the indicator light on or off based on the signal from the contact sensor. The contact sensor can be a piezoelectric film or a microswitch array. For example, if the contact sensor is a ring-shaped piezoelectric film, when the joint of the first steel bar contacts the piezoelectric film, the piezoelectric film conducts, and the indicator light illuminates. When there is a gap between the joint and the piezoelectric film, the piezoelectric film disconnects, and the indicator light goes off.

[0086] After the first detection tube 1 is put on the first steel bar and the second detection tube 2 is put on the second steel bar, if the indicator light is on, it means that the joint of the first steel bar is in contact with the contact sensor on the top of the first detection tube 1. At this time, the staggered length between the joint of the first steel bar and the joint of the second steel bar is greater than or equal to 35 D, the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirements; if the indicator light is off, it means: there is a gap between the joint of the first steel bar and the contact sensor on the top of the first detection tube 1. At this time, the staggered length of the joint of the first steel bar and the joint of the second steel bar is less than 35 D. The staggered length between the joint of the first steel bar and the joint of the second steel bar does not meet the requirements.

[0087] In this embodiment, the inspection personnel use the indicator light to determine whether the joint of the first steel bar and the joint of the second steel bar meet the requirements, which further improves the inspection efficiency.

[0088] In a specific embodiment, Figure 1 As shown, the first detection tube 1 and the second detection tube 2 are connected by a connecting beam 5, and the connecting beam 5 includes a first beam section 51 and a second beam section 52. One end of the first beam section 51 is inserted into the second beam section 52, and the first detection tube 1 is connected to the end of the first beam section 51 away from the second beam section 52, and the second detection tube 2 is connected to the end of the second beam section 52 away from the first beam section 51; before the first detection tube 1 is inserted into the first steel bar and the second detection tube 2 is inserted into the second steel bar, the detection method includes: adjusting the length of the first beam section 51 inserted into the second beam section 52 according to the lateral spacing between the first steel bar and the second steel bar, so that the first detection tube 1 and the second detection tube 2 are aligned with the first steel bar and the second steel bar, respectively.

[0089] In this embodiment, the connecting beam 5 is a retractable structure. When detecting the first steel bar and the second steel bar with different transverse spacings, the first detection tube 1 and the second detection tube 2 can be aligned with the first steel bar and the second steel bar respectively by adjusting the length of the connecting beam 5, which is convenient and quick.

[0090] Specifically, if Figure 5 As shown, a limiting plate 53 is provided on the end of the first beam section 51 away from the first detection tube 1, and a limiting boss is provided on the inner wall of the end of the second beam section 52 away from the second detection tube 2. The limiting plate 53 is used to cooperate with the limiting boss to prevent the first beam section 51 and the second beam section 52 from separating from each other.

[0091] Specifically, the two ends of the connecting beam 5 are respectively provided with a first clamping portion 54 and a second clamping portion 55, the first detection tube 1 is provided with a first clamping fitting portion 16, and the second detection tube 2 is provided with a second clamping fitting portion 21; before the first detection tube 1 is put on the first steel bar and the second detection tube 2 is put on the second steel bar, the detection method includes: matching the first clamping fitting portion 16 of the first detection tube 1 with the first clamping portion 54 at one end of the connecting beam 5; matching the second clamping fitting portion 21 of the second detection tube 2 with the second clamping portion 55 at the other end of the connecting beam 5.

[0092] In this embodiment, the first detection tube 1 and the second detection tube 2 are respectively connected to the connecting beam 5 by a snap-fit ​​structure, so that the first detection tube 1, the second detection tube 2 and the connecting beam 5 are easy to disassemble and assemble, and easy to store and carry. In addition, the bottoms of the first detection tube 1 and the second detection tube 2 are flush, and the axes of the first detection tube 1 and the second detection tube 2 are parallel, ensuring that the height difference between the first detection tube 1 and the second detection tube 2 is maintained at 35 degrees each time they are reinstalled. D.

[0093] The first clamping portion 54 and the second clamping portion 55 may be Figure 1 The buckle shown in the figure, the first snap-fitting portion 16 and the second snap-fitting portion 21 can be Figure 1 card slot shown.

[0094] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A method for detecting the staggered length of vertical steel bar joints, characterized in that: Testing is performed using a detection device, the detection device comprising a first detection tube and a second detection tube connected to each other and having parallel axes, the first detection tube and the second detection tube being transparent tubes, the first detection tube being higher than the second detection tube, and the vertical steel bars comprising first and second steel bars arranged side by side; the detection method comprising: Putting the first detection tube on the first steel bar and putting the second detection tube on the second steel bar; If the joint of the first steel bar contacts the top of the first detection tube and the joint of the second steel bar contacts the top of the second detection tube, a detection result is obtained indicating that the staggered length of the joint of the first steel bar and the joint of the second steel bar meets the requirement; If the joint of the first steel bar contacts the top of the first detection tube, and the joint of the second steel bar is spaced apart from the top of the second detection tube, a detection result is obtained indicating that the staggered length between the joint of the first steel bar and the joint of the second steel bar meets the requirements; If there is a gap between the joint of the first steel bar and the top of the first detection tube, and the joint of the second steel bar contacts the top of the second detection tube, a detection result is obtained indicating that the offset length between the joint of the first steel bar and the joint of the second steel bar does not meet the requirement; The detection device further includes a laser rangefinder, wherein the first detection tube has a tube body and a cover plate, the cover plate is fixed to one end of the tube body, the laser rangefinder is mounted on the outer side of the cover plate, and the cover plate is provided with a through hole for the laser emitted by the laser rangefinder to pass through; If there is a gap between the joint of the first steel bar and the top of the first detection tube, the distance between the joint of the first steel bar and the top of the first detection tube is obtained by the laser rangefinder.

2. The detection method according to claim 1, wherein The vertical steel bars include a first type of steel bars and a second type of steel bars, and the diameter of the first type of steel bars is smaller than that of the second type of steel bars; the first detection tube includes a first tube section and a second tube section, one end of the second tube section is sleeved in the first tube section, the inner wall of the first tube section is provided with a limiting step, the second tube section is provided with an elastic locking structure, and the first tube section is provided with a locking hole; when the bottom of the second tube section abuts against the limiting step of the first tube section, the first detection tube is in a first state; when the elastic locking structure of the second tube section is engaged with the locking hole of the first tube section, the first detection tube is in a second state; The step of putting the first detection tube on the first steel bar comprises: If the first steel bar is a first type steel bar, the first detection tube in the first state is placed on the first type steel bar; If the first steel bar is a second type of steel bar, the first detection tube in the second state is put on the second type of steel bar.

3. The detection method according to claim 1, wherein The detection device further includes an indicator light and a contact sensor connected to each other, wherein the indicator light is arranged on the outside of the first detection tube, and the contact sensor is arranged on the inside of the top of the first detection tube; when there is a gap between the joint of the first steel bar and the contact sensor, the indicator light is off; when the joint of the first steel bar is in contact with the contact sensor, the indicator light is on; Obtaining a detection result of a staggered length between a joint of the first steel bar and a joint of the second steel bar according to a position of the first steel bar in the first detection tube and a position of the second steel bar in the second detection tube, including: If the indicator light is on, the detection result is obtained that the staggered length of the joint of the first steel bar and the second steel bar meets the requirements; if the indicator light is off, the detection result is obtained that the staggered length of the joint of the first steel bar and the second steel bar does not meet the requirements.

4. The detection method according to claim 1, wherein The first detection tube and the second detection tube are connected by a connecting beam, which includes a first beam section and a second beam section. One end of the first beam section is inserted into the second beam section. The first detection tube is connected to the end of the first beam section away from the second beam section, and the second detection tube is connected to the end of the second beam section away from the first beam section. Before putting the first detection tube on the first steel bar and putting the second detection tube on the second steel bar, the detection method includes: The length of the first beam section within the second beam section is adjusted according to the transverse distance between the first steel bar and the second steel bar, so that the first detection tube and the second detection tube are aligned with the first steel bar and the second steel bar respectively.

5. The detection method according to claim 1, wherein The first detection tube and the second detection tube are connected by a connecting beam, and the two ends of the connecting beam are respectively provided with a first clamping portion and a second clamping portion. The first detection tube is provided with a first clamping fitting portion, and the second detection tube is provided with a second clamping fitting portion. Before the first detection tube is sleeved on the first steel bar and the second detection tube is sleeved on the second steel bar, the detection method includes: Engage the first clamping portion of the first detection tube with the first clamping portion at one end of the connecting beam; The second clamping portion of the second detection tube is engaged with the second clamping portion at the other end of the connecting beam.

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