Semi-automatic, portable and non-destructive testing equipment and method for load-bearing capacity of mobile railings

Abstract

The present invention provides a semi-automatic, portable and mobile non-destructive testing device and method for the bearing capacity of railings, wherein the device comprises a base platform, a main support, a secondary support, a horizontal force loading device, a contact device and a data acquisition and processing device. The present invention detects the height through a hydraulic cylinder control device, and the servo hydraulic cylinder performs graded horizontal force loading, and works in coordination with the base and the secondary support, the contact device and the data acquisition and processing device. It can not only detect the bearing capacity of the horizontal railings of bridge sidewalks and pedestrian overpasses, but also can perform bearing capacity detection of the railings of stairs on pedestrian overpasses. It can perform not only single-point loading detection but also two-point loading detection. The overall instrument is easy to move, has little impact on traffic, has a relatively simple structure, and can realize semi-automatic detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of railing bearing capacity detection, and in particular relates to a device and method for detecting the horizontal thrust bearing capacity of a bridge sidewalk railing or a pedestrian bridge guardrail. Background Art

[0002] With the rapid development of urban construction and road connectivity, more and more small and medium-sized bridges and pedestrian overpasses are being built into the urban road network, making pedestrian travel more convenient. The construction of sidewalks on small and medium-sized bridges and urban pedestrian overpasses has good traffic and social benefits for increasing vehicle circulation speed, realizing the separation of people and vehicles, and improving the quality of urban walking. Therefore, the correct detection and evaluation of the safety status of bridge pedestrian railings and pedestrian overpass railings to ensure pedestrian travel safety is crucial to improving the quality of social services.

[0003] At present, there are not many studies on bridge railing bearing capacity detection devices in China. On-site railing detection relies on heavy objects (mostly heavy vehicles) as rear support reaction force, which affects traffic, is clumsy to move, and requires multiple people to assist in collaborative work, which is inefficient. At the same time, Beijing Municipal Engineering Research Institute, Hubei Zhongjingheng Building Inspection Technology Co., Ltd. and others have invented overpass railing detection devices and building railing detection devices, which have improved the railing detection method to a certain extent, but also have the above-mentioned defects. Based on the current research and development status of railing detection devices, considering the applicability of the device, economic efficiency, convenience of movement, and reduction of traffic impact and other factors, it is necessary to invent a railing horizontal bearing capacity detection device that is more automated, convenient to move, and has less impact on traffic. Summary of the invention

[0004] The invention discloses a semi-automatic, portable and non-destructive testing device and a testing method for the bearing capacity of a mobile handrail, so as to solve the deficiencies of the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] Semi-automatic, portable and mobile railing load-bearing capacity non-destructive testing equipment, including:

[0007] Base platform;

[0008] A main support, which is fixedly mounted on the base platform;

[0009] A secondary support, which is connected to the main support and the base platform as a whole;

[0010] A horizontal force loading telescopic device, which is vertically mounted at the telescopic end of the main support;

[0011] A contact device, which is fixed to the telescopic head of the horizontal force loading telescopic device, and the contact device is used to contact the railing;

[0012] The data acquisition and processing device comprises a displacement sensor and a pressure sensor. The displacement sensor is fixed on the horizontal force loading telescopic device to detect the displacement of the horizontal force loading telescopic device. The pressure sensor is fixed on the contact device to detect the bearing capacity of the railing.

[0013] As a further description of the above technical solution:

[0014] The base platform comprises a base platform, and the base platform is made of a steel plate with holes integrally opened.

[0015] As a further description of the above technical solution:

[0016] Two front hook plates are rotatably provided at the lower front end of the base platform, and the base platform is provided with a pull-type semi-automatic spherical controller for controlling the switch of the front hook plates. A wedge-shaped limit block is welded at the rear of the front hook plates at the lower part of the base platform, and two rear ground supports are provided at the rear end of the base platform, and the rear ground support includes a bottom universal chassis, and a rotatable screw rod is fixed at the upper end of the bottom universal chassis, and the rotatable screw rod passes through the base platform, and nuts matching the threads thereof are provided at the upper and lower ends of the base platform.

[0017] As a further description of the above technical solution:

[0018] Four concealable universal wheels are provided at the lower part of the base platform, a through square hole is opened in the middle of the front end of the base platform, a level bubble is buried in the upper part of the rear end of the base platform, and a movable handrail is provided on the base platform. The movable handrail includes a steel rod fixed to the base platform and a steel pipe handrail fixed to the upper end of the steel rod.

[0019] As a further description of the above technical solution:

[0020] The main support comprises a hydraulic cylinder, the lower end of which is fixed to the base platform, and the upper end telescopic rod of which is fixed with a connecting block.

[0021] As a further description of the above technical solution:

[0022] The secondary support includes a rear secondary support and a front secondary support, the rear secondary support includes three non-retractable steel rods, the bottoms of the three non-retractable steel rods are provided with slidable steel track grooves and slidable limit blocks, the non-retractable steel rods are hinged to the connecting blocks of the main support through connecting rings, the three non-retractable steel rods are distributed at angles of 45, 0, and -45 degrees along the center of the main support on the base platform, the non-retractable steel rods are hinged to the slidable steel track grooves through hooks, the front secondary support includes a supporting steel rod, one end of the supporting steel rod is connected to the main support through a detachable hook, and the other end is connected to a fixed block welded to the base platform through a hook.

[0023] As a further description of the above technical solution:

[0024] The horizontal force loading telescopic device comprises a servo hydraulic cylinder, the rear end of which can be fixed to a connecting block by screws, and the front end of a lifting and retracting rod of the servo hydraulic cylinder is connected to a connecting head and an angle converter.

[0025] As a further description of the above technical solution:

[0026] The contact device includes two high-strength anti-bending steel plates, two fixed steel sleeves, a connecting head, a sliding rail, three contact blocks and three fixed rings. The anti-bending steel plate is grooved in the middle and can be fixed to the inside of the two ends of the fixed steel sleeve by screws. The sliding rail is fixed on the middle groove of the anti-bending steel plate, the connecting head is fixed in the middle of the fixed steel sleeve, the contact block in the middle is fixed on the connecting head, and the contact blocks at both ends are arranged on the sliding rails. The contact blocks at both ends can slide on the sliding rails and can be fixed at the detection position. The fixed ring fixes the bottom of the contact block, and the fixed ring can change with the position of the contact block.

[0027] As a further description of the above technical solution:

[0028] The data acquisition and processing device also includes a signal acquisition card, a laser level and a computer. The signal acquisition card is used to collect data from pressure sensors and displacement sensors and transmit them to the computer. The computer performs data collection and processing. The laser level is installed on the connecting block of the main support and is used to guide the lifting cylinder to align the contact block horizontally with the railing handrail.

[0029] According to the above-mentioned semi-automatic, portable and mobile railing bearing capacity non-destructive testing device, the testing method comprises the following steps:

[0030] Step 1: Level the base platform 1;

[0031] ① Single-point detection: Tighten the screws to remove the two anti-bending steel plates of the contact device, push the handrail to insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab on the lower side of the railing to expose the front hook plate as a whole, observe the adjustment platform position of the servo hydraulic cylinder, align the horizontal force loading telescopic device with the detection point, then pull the two front hook plate spherical controllers to open the front hook plates, pull the handrail to move the base platform backward, so that the front hook plate contacts the outer edge of the sidewalk slab or the outer edge of the pedestrian bridge stair slab, retract the concealable universal wheel, and place the universal chassis of the rear ground support flat on the sidewalk slab or the stair platform. Finally, adjust the height of the rear ground support to center the tube level bubble.

[0032] ② Two-point detection: Install the two bending-resistant steel plates of the fixed contact device, remove the middle contact block and the fixing ring, retract the concealable universal wheel, place the detection equipment as a whole at the detection location, insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab to expose the front hook plate as a whole, observe the servo hydraulic cylinder adjust the position of the base platform, align the horizontal force loading telescopic device with the middle column of the railing, adjust the position of the two contact blocks, align the contact blocks with the midpoint of the detection railing, pull the two front hook plate spherical controllers to open the front hook plates, pull the handrail to move the base platform backward, let the front hook plate contact the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab, place the universal chassis of the rear ground support flat on the sidewalk slab or the step platform, and adjust the height of the rear ground support to center the tube level bubble;

[0033] Step 2: Check height adjustment;

[0034] Turn on the laser level, loosen the slidable limit block of the rear auxiliary support, start the hydraulic cylinder with the computer, control the lifting height of the main support, align the laser point with the middle of the railing and stop the lifting of the main support, and finally fix the slidable limit block of the rear auxiliary support by tightening the limit block and fixing the handle;

[0035] Step 3: contact device adjustment;

[0036] Single-point detection: open the fixing ring, the computer starts the horizontal servo hydraulic cylinder, stops the cylinder extension after the contact block contacts the railing, fine-tunes the position of the contact block, and closes the fixing ring so that it holds the railing tightly.

[0037] Two-point detection: loosen the angle converter, rotate the contact device to be parallel to the railing, lock the angle converter, open the two fixing rings, start the horizontal servo hydraulic cylinder controller with the computer, stop the cylinder extension after the two contact blocks contact the railing, fine-tune the position of the contact blocks, align with the detection point, and close the two fixing rings to make the fixing rings hold the railing tightly;

[0038] Step 4: Connection of data acquisition and processing device;

[0039] Connect the displacement sensor and the pressure sensor to the signal acquisition card, which is connected to the computer to record the initial data;

[0040] Step 5: Bearing capacity test;

[0041] The computer controls the loading of the servo hydraulic cylinder. The loading force and loading process are implemented in accordance with Article 10.0.7 of the Code for Design of Urban Bridges CJJ11-2011 (2019 Edition) and the bearing capacity test procedure in Section B.3 of the Code for Design of Urban Bridges JG / T 342-2012.

[0042] Step 6: Detection completed; after the detection is completed, dismantle or move the device in the reverse order of the detection installation method.

[0043] The present invention has the following beneficial effects:

[0044] The present invention detects the height through the hydraulic cylinder control device, and the servo hydraulic cylinder performs graded loading of horizontal force, and works in coordination with the base and auxiliary support, contact, and data acquisition and processing devices. It can not only detect the bearing capacity of the horizontal railings of the bridge sidewalk and the pedestrian overpass, but also the bearing capacity of the railings of the upper and lower stairs of the pedestrian overpass. It can perform not only single-point loading detection but also two-point loading detection. The overall instrument is easy to move, has little impact on traffic, has a relatively simple structure, and can realize semi-automatic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment disclosed in the present invention;

[0046] Figure 2 It is a schematic diagram of the base platform structure of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment disclosed in the present invention;

[0047] Figure 3 It is a schematic diagram of the main support structure of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment disclosed in the present invention;

[0048] Figure 4 It is a schematic diagram of the auxiliary support structure of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment disclosed in the present invention;

[0049] Figure 5 It is a structural schematic diagram of a horizontal force loading and retracting device and a data acquisition and processing device of a semi-automatic, portable and mobile railing bearing capacity non-destructive testing device disclosed in the present invention;

[0050] Figure 6 It is a schematic diagram of the contact device structure of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment disclosed in the present invention;

[0051] Figure 7 It is a schematic diagram of the structure of a spherical controller of a semi-automatic, portable and mobile railing bearing capacity non-destructive testing device disclosed in the present invention;

[0052] Figure 8 It is a schematic diagram of the structure of the wedge-shaped limit block of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing device disclosed in the present invention;

[0053] Fig. 9 The present invention discloses a schematic diagram of a structure of a limit block fixing handle in a secondary support structure of a semi-automatic, portable and mobile railing bearing capacity non-destructive testing device.

[0054] Figure numerals: 1-base platform; 1-1-front hook plate; 1-2-spherical controller; 1-2-1-pull head; 1-2-2-pull rod; 1-2-3-baffle; 1-2-4 spring; 1-2-5-spherical head; 1-3-bottom universal chassis; 1-4-nut; 1-5-movable handrail; 1-6-hidden universal wheel; 1-8-tube level bubble; 1-9-wedge-shaped limit block; 2-main support; 2-1-ordinary hydraulic cylinder; 2-2-connecting block; 2-3-hook ring; 2-4-hook ring; 3-secondary support; 3-1-non-retractable steel rod; 3-2-support steel Rod; 3-3-track groove; 3-4-slidable limit block; 3-5-connecting ring; 3-6-fixed block; 3-7-fixed block fixing handle; 4-horizontal force loading telescopic device; 4-1-servo hydraulic cylinder; 4-2-angle converter; 5-contact device; 5-1-bending steel plate; 5-2-steel sleeve plate; 5-3-connecting head; 5-4-sliding rail; 5-5-contact block; 5-6-fixed ring; 6-data acquisition and processing device; 6-1-displacement sensor; 6-2-pressure sensor; 6-3-signal acquisition card; 6-4-laser level; 6-5-computer. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] like Figure 1 As shown, a semi-automatic, portable and mobile non-destructive testing equipment for the bearing capacity of a railing comprises a base platform 1, a main support 2, a secondary support 3, a horizontal force loading telescopic device 4, a contact device 5 and a data acquisition and processing device 6; the main support 2 is fixedly mounted on the base platform 1; the secondary support 3 is hinged to the base platform 1 and the main support 2 respectively; the horizontal force loading telescopic device 4 is vertically mounted at the telescopic end of the main support 2; the contact device 5 is fixed on the telescopic head of the horizontal force loading telescopic device 4, and the contact device 5 is used to contact the railing; the data acquisition and processing device 6 comprises a displacement sensor 6-1 and a pressure sensor 6-2, the displacement sensor 6-1 is fixed on the horizontal force loading telescopic device 4 to detect the displacement of the horizontal force loading telescopic device, and the pressure sensor 6-2 is fixed on the contact device 5 to detect the bearing capacity of the railing.

[0057] In this embodiment, the base platform 1 includes a base platform, which is made of a steel plate with an integral hole; two front hook plates 1-1 are rotatably provided at the lower front end of the base platform, and the base platform is provided with a pull-type semi-automatic spherical controller 1-2 for controlling the switch of the front hook plate 1-1. The pull-type semi-automatic spherical controller 1-2 includes 1-2-1-pull head, 1-2-2-pull rod, 1-2-3-baffle, 1-2-4 spring, 1-2-5-spherical head. The front hook plate 1-1 is lowered to work by pulling the pull head 1-2-1 of the semi-automatic spherical controller 1-2, so that the pull rod 1-2-2 drives the spherical head 1-2-5 to move outward. The pull head 1-2-1 of the semi-automatic spherical controller is fixed together with the pull rod 1-2-2 as a nut structure, the pull rod 1-2-2 and the spherical head 1-2-5 are welded into a whole, the baffle 1-2-3 is welded in the middle of the channel, and the spring 1-2-4 is used as an elastic structure. The structure has the function of pre-applying elastic force so that the pulled rod body can rebound to its original position, and a wedge-shaped limit block 1-9 is welded at the rear of the front hook plate 1-1 at the lower part of the base platform, and the wedge-shaped limit block 1-9 is used to prevent the front baffle 1-1 from bending backward when working. Two rear ground supports are arranged at the rear end of the base platform, and the rear ground support includes a bottom universal chassis 1-3, and a rotatable screw rod is fixed at the upper end of the bottom universal chassis 1-3, and the rotatable screw rod passes through the base platform, and nuts 1-4 that cooperate with the threads thereof are arranged at the upper and lower ends of the base platform; four concealable universal wheels 1-6 are arranged at the lower part of the base platform, a through square hole 1-7 is opened in the middle part of the front end of the base platform, and a tube level bubble 1-8 is buried in the upper part of the rear end of the base platform, and a movable handrail 1-5 is arranged on the base platform, and the movable handrail includes a steel rod fixed to the base platform, and a steel pipe handrail fixed to the upper end of the steel rod. During on-site inspection and installation, the platform must be level, with all components working together to ensure that the base supports the overall structure and serves as the foundation.

[0058] In this embodiment, the main support 2 includes a common hydraulic cylinder 2-1, the lower end of which is fixed to the base platform, and the upper end of the telescopic rod is fixed with a connecting block 2-2, the front of which is provided with an opening connected to the rear end of the horizontal force loading telescopic device 4 and a hole for fixing the laser level 6-4, the rear of the connecting block 2-2 is welded with a hook ring 2-3 connected to the top of the rear auxiliary support, and the lower part of the common hydraulic cylinder 2-1 is provided with a hook ring 2-4 connected to the front auxiliary support.

[0059] In this embodiment, the horizontal force loading telescopic device 4 includes a servo hydraulic cylinder 4-1, the rear end of the servo hydraulic cylinder 4-1 can be fixed to the connecting block 2-2 by screws, and the front end of the lifting and retracting rod of the servo hydraulic cylinder 4-1 is connected with a connecting head and an angle converter 4-2, which is used to be connected to the contact device 5 as a whole and can convert the angle so that the anti-bending steel plate 5-1 of the contact device is parallel to the detection railing.

[0060] In this embodiment, the contact device 5 includes two high-strength anti-bending steel plates 5-1, two fixed steel sleeves 5-2, a connecting head 5-3, a sliding rail 5-4, three contact blocks 5-5 and three fixed rings 5-6. The anti-bending steel plate 5-1 is grooved in the middle and can be fixed to the fixed steel sleeve 5-2 by screws. The sliding rail 5-4 is fixed on the middle groove of the anti-bending steel plate 5-1. The connecting head 5-3 is fixed in the middle of the two fixed steel sleeves 5-2. The contact block 5-5 in the middle is fixed on the connecting head 5-3. The contact blocks 5-5 at both ends are slidably set on the sliding rails 5-4. The contact blocks 5-5 at both ends can slide on the sliding rails and be fixed at the detection position. The fixed ring 5-6 fixes the bottom of the contact block 5-5, and the fixed ring 5-6 can change with the position of the contact block 5-5.

[0061] In this embodiment, the data acquisition and processing device 6 also includes a signal acquisition card 6-3, a laser level 6-4 and a computer 6-5. The signal acquisition card 6-3 is used to collect data from the pressure sensor 6-2 and the displacement sensor 6-1 and transmit them to the computer 6-5. The computer 6-5 performs data collection and processing. The laser level 6-4 is installed on the connecting block 2-2 of the main support 2, and is used to guide the lifting cylinder to make the contact block 5-5 horizontally aligned with the railing handrail.

[0062] In this embodiment, the detection device also includes a secondary support 3, and the secondary support 3 includes a rear secondary support and a front secondary support. The rear secondary support includes three non-retractable steel rods 3-1. The bottoms of the three non-retractable steel rods 3-1 are all provided with slidable steel track grooves 3-3, slidable limit blocks 3-4 and fixed block fixing handles 3-7. The fixed block fixing handles 3-7 are used to fix the slidable limit blocks 3-4 of the rear secondary support 3. The non-retractable steel rods 3-1 are hinged to the connecting blocks 2-2 of the main support through connecting rings 3-5. The three non-retractable steel rods 3-1 are The center of the main support 2 along the upper edge of the base platform is distributed at angles of 45, 0, and -45 degrees. The non-retractable steel rod 3-1 is hinged with the slidable steel track groove 3-3 through a hook ring. The front auxiliary support includes a supporting steel rod 3-2. One end of the supporting steel rod 3-2 is connected to the ordinary hydraulic cylinder 2-1 of the main support 2 through a detachable hook ring, and the other end is connected to the fixed block 3-6 welded to the base platform through a hook ring. The auxiliary support 3 plays the main role of bearing the horizontal reverse thrust. After the main support 2 is adjusted to the detection height, the rear auxiliary support is fixed at the limit point to prevent the rear auxiliary support from slipping during detection.

[0063] A detection method according to the above-mentioned semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment is applied to the above-mentioned bridge sidewalk railing and pedestrian bridge horizontal railing bearing capacity non-destructive testing equipment, and its specific detection steps are as follows:

[0064] Step 1: Level the base platform 1;

[0065] ① Single-point detection: Tighten the screws to remove the two anti-bending steel plates 5-1 of the contact device 5, push the handrail 1-5 to insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab on the lower side of the railing to expose the front hook plate 1-1 as a whole, observe the servo hydraulic cylinder 4-1 to adjust the platform position, so that the horizontal force loading telescopic device 4 is aligned with the detection point, and then pull the two front hook plate spherical controllers 1-2 to open the front hook plate 1-1, pull the handrail to move the base platform backward, so that the front hook plate 1-1 contacts the outer edge of the sidewalk slab or the outer edge of the pedestrian bridge stair slab, retract the concealable universal wheel 1-6, and place the universal chassis of the rear ground support flat on the sidewalk slab or the stair platform, and finally adjust the height of the rear ground support to center the tube level bubble 1-8.

[0066] ② Two-point detection: install the two bending-resistant steel plates 5-1 of the fixed contact device 5, remove the middle contact block 5-5 and the fixing ring 5-6, retract the concealable universal wheel 1-6, place the whole device at the detection position, insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab to expose the front hook plate 1-1 as a whole, observe the servo hydraulic cylinder 4-1 to adjust the platform position, align the horizontal force loading telescopic device 5 with the middle column of the railing, adjust the position of the two contact blocks 5-5, align the contact blocks with the midpoint of the detection railing, pull the two front hook plate spherical controllers to open the front hook plate 1-1, pull the handrail to move the base platform backward, let the front hook plate 1-1 contact the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab, place the universal chassis 1-4 of the rear ground support flat on the sidewalk slab or the step platform, and adjust the height of the rear ground support to make the tube level bubble 1-8 centered;

[0067] Note: The scope of use of the above single-point detection and two-point detection: For the current design, when the center distance between two adjacent railings exceeds 2 meters, single-point detection is preferred, and when the distance is less than 2 meters, two-point detection is preferred. However, the specific implementation method depends on the actual device size and detection environment.

[0068] Step 2: Check height adjustment;

[0069] Turn on the laser level 6-4, loosen the slidable limit block 3-4 of the rear auxiliary support, start the hydraulic cylinder 2-1 with the computer, control the lifting height of the main support 2, align the laser point with the middle of the railing and stop the lifting of the main support 2, and finally fix the slidable limit block 3-4 of the rear auxiliary support 3 by tightening the fixing block fixing handle 3-7 of the auxiliary support 3;

[0070] Step 3: contact device 5 adjustment;

[0071] Single-point detection: open the fixing ring 5-6, the computer starts the horizontal servo hydraulic cylinder 4-1, stops the cylinder extension after the contact block 5-5 contacts the railing, fine-tunes the position of the contact block 5-5, closes the fixing ring 5-6 so that the fixing ring holds the railing tightly.

[0072] Two-point detection: loosen the angle converter 4-2, rotate the contact device to be parallel to the railing, lock the angle converter 4-2, open the two fixing rings 5-6, start the horizontal servo hydraulic cylinder controller with the computer, stop the cylinder extension after the two contact blocks 5-5 contact the railing, fine-tune the position of the contact block 5-5, align with the detection point, close the two fixing rings 5-6 to make the fixing rings hold the railing tightly;

[0073] Step 4: Connecting the data acquisition and processing device; connecting the displacement sensor 6-1 and the pressure sensor 6-2 to the signal acquisition card 6-3, connecting the signal acquisition card to the computer 6-5, and recording the initial data;

[0074] Step 5: Bearing capacity test; the computer controls the servo hydraulic cylinder to load, and the loading force and loading process are implemented according to Article 10.0.7 of the "Urban Bridge Design Code" CJJ11-2011 (2019 Edition) and the bearing capacity test procedure in Section B.3 of "Glass and Metal Guardrails for Buildings" JG / T342-2012;

[0075] Step 6: Detection completed; after the detection is completed, dismantle or move the device in the reverse order of the detection installation method.

[0076] This specific implementation method assembles the base platform, main support, auxiliary support, horizontal force loading telescopic device, contact device, and data acquisition and processing device into an integral working unit. The detection equipment can not only non-destructively detect the bearing capacity of the horizontal railings of bridge sidewalks and pedestrian overpasses, but also can detect the bearing capacity of the railings of the upper and lower stairs of the pedestrian overpass. It has the advantages of simple structure, easy movement, and little impact on traffic during detection.

[0077] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Semi-automatic, portable and non-destructive testing equipment for the bearing capacity of railings, characterized in that: include: Base platform; A main support, which is fixedly mounted on the base platform; A secondary support, which is connected to the main support and the base platform as a whole; A horizontal force loading telescopic device, which is vertically mounted at the telescopic end of the main support; A contact device, which is fixed to the telescopic head of the horizontal force loading telescopic device, and the contact device is used to contact the railing; A data acquisition and processing device, comprising a displacement sensor and a pressure sensor, wherein the displacement sensor is fixed on the horizontal force loading telescopic device to detect the displacement of the horizontal force loading telescopic device, and the pressure sensor is fixed on the contact device to detect the bearing capacity of the railing; The base platform is made of a steel plate with holes cut into it as a whole; The lower front end of the base platform is rotatably provided with two front hook plates, the base platform is provided with a pull-type semi-automatic spherical controller for controlling the switch of the front hook plates, the rear of the front hook plates is welded with a wedge-shaped limit block at the lower part of the base platform, and the rear end of the base platform is provided with two rear ground supports, the rear ground supports include a bottom universal chassis, and a rotatable screw rod is fixedly provided at the upper end of the bottom universal chassis, the rotatable screw rod passes through the base platform, and nuts matching with the threads thereof are provided at the upper and lower ends of the base platform; The lower part of the base platform is provided with four concealable universal wheels, a through square hole is opened in the middle of the front end of the base platform, a level bubble is buried in the upper part of the rear end of the base platform, and a movable handrail is provided on the base platform, and the movable handrail includes a steel rod fixed to the base platform and a steel pipe handrail fixed to the upper end of the steel rod; The main support comprises a hydraulic cylinder, the lower end of which is fixed to the base platform, and the upper end of which is fixed with a connecting block on a telescopic rod; The horizontal force loading telescopic device comprises a servo hydraulic cylinder, the rear end of which can be fixed to a connecting block by screws, and the front end of the telescopic rod of the servo hydraulic cylinder is connected to a connector and an angle converter; The contact device comprises two high-strength anti-bending steel plates, two fixed steel sleeves, a connector, a sliding rail, three contact blocks and three fixing rings. The anti-bending steel plate is slotted in the middle and fixed to the fixed steel sleeve by screws. The sliding rail is fixed to the middle slot of the anti-bending steel plate. The connector is fixed to the middle of the fixed steel sleeve. The contact block in the middle is fixed to the connector. The contact blocks at both ends are slidably arranged on the sliding rails. The contact blocks at both ends can slide on the sliding rails and can be fixed at the detection position. The fixing ring fixes the bottom of the contact block, and the fixing ring can change with the change of the position of the contact block. The data acquisition and processing device also includes a signal acquisition card, a laser level and a computer. The signal acquisition card is used to collect data from the pressure sensor and the displacement sensor and transmit the data to the computer. The computer collects and processes the data. The laser level is installed on the connection block of the main support and is used to guide the lifting cylinder to align the contact block horizontally with the railing handrail. The detection device also includes a secondary support, and the secondary support includes a rear secondary support and a front secondary support, and the rear secondary support includes three non-retractable steel rods, and the bottoms of the three non-retractable steel rods are provided with slidable steel track grooves and slidable limit blocks, and the non-retractable steel rods are hinged to the connecting blocks of the main support through a connecting ring, and the three non-retractable steel rods are distributed at 45, 0, and -45 degrees along the center of the main support on the upper part of the base platform, and the non-retractable steel rods are hinged to the slidable steel track grooves through a hook ring, and the front secondary support includes a supporting steel rod, one end of the supporting steel rod is connected to the main support through a detachable hook ring, and the other end is connected to a fixed block welded to the base platform through a hook ring; Among them, the detection method of the semi-automatic, portable and mobile railing bearing capacity non-destructive testing equipment includes the following steps: Step 1: Level the base platform 1; ① Single-point detection: Tighten the screws to remove the two bending-resistant steel plates of the contact device, push the handrail to insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab under the railing to expose the front hook plate as a whole, observe the adjustment platform position of the servo hydraulic cylinder, align the horizontal force loading telescopic device with the detection point, then pull the two front hook plate spherical controllers to open the front hook plate, pull the handrail to move the base platform backward, so that the front hook plate contacts the outer edge of the sidewalk slab or the outer edge of the pedestrian bridge stair slab, retract the concealable universal wheel, and place the universal chassis of the rear ground support flat on the sidewalk slab or the stair platform, and finally adjust the height of the rear ground support to center the bubble of the tube level; ② Two-point detection: Install the two bending-resistant steel plates of the fixed contact device, remove the middle contact block and the fixing ring, retract the concealable universal wheel, place the detection equipment as a whole at the detection location, insert the front end of the base platform into the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab to expose the front hook plate as a whole, observe the servo hydraulic cylinder adjust the position of the base platform, align the horizontal force loading telescopic device with the middle column of the railing, adjust the position of the two contact blocks, align the contact blocks with the midpoint of the detection railing, pull the two front hook plate spherical controllers to open the front hook plates, pull the handrail to move the base platform backward, let the front hook plate contact the outer edge of the bridge sidewalk or the outer edge of the pedestrian bridge stair slab, place the universal chassis of the rear ground support flat on the sidewalk slab or the step platform, and adjust the height of the rear ground support to center the tube level bubble; Step 2: Check height adjustment; Turn on the laser level, loosen the slidable limit block of the rear auxiliary support, start the hydraulic cylinder with the computer, control the lifting height of the main support, align the laser point with the middle of the railing and stop the lifting of the main support, and finally fix the slidable limit block of the rear auxiliary support by tightening the limit block and fixing the handle; Step 3: contact device adjustment; Single-point detection: open the fixing ring, the computer starts the horizontal servo hydraulic cylinder, stops the cylinder extension after the contact block contacts the railing, fine-tunes the position of the contact block, closes the fixing ring so that it holds the railing tightly; Two-point detection: loosen the angle converter, rotate the contact device to be parallel to the railing, lock the angle converter, open the two fixing rings, start the horizontal servo hydraulic cylinder controller with the computer, stop the cylinder extension after the two contact blocks contact the railing, fine-tune the position of the contact blocks, align with the detection point, and close the two fixing rings to make the fixing rings hold the railing tightly; Step 4: Connection of data acquisition and processing device; Connect the displacement sensor and the pressure sensor to the signal acquisition card, which is connected to the computer to record the initial data; Step 5: Bearing capacity test; The computer controls the loading of the servo hydraulic cylinder. The loading force and loading process are implemented in accordance with the load-bearing capacity test procedures in Section B.3 of the Urban Bridge Design Code CJJ11-2011 and Section B.3 of the Building Glass and Metal Guardrails JG / T 342-2012. Step 6: Detection completed; after the detection is completed, dismantle or move the device in the reverse order of the detection installation method.

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