Method for testing external load of super-large-diameter reinforced concrete pipe section

Abstract

The application relates to an external load test method for a super-large-diameter reinforced concrete pipe joint, and the scheme comprises the following steps: step one, installing a hoisting system; step two, installing a base system; step three, installing a supporting and pressurizing system; step four, installing a protective plate; step five, installing a water jet assembly; step six, adjusting the base system; step seven, hoisting the pipe joint into position; step eight, loading; step nine, scanning cracks in the pipe joint; and step ten, breaking the pipe joint 1. The application provides an external load test system for a pipe joint, which comprises a hoisting system, a base system, a pressurizing system, a supporting system and a protective system. The test system integrates multiple test functions, realizes high integration, and improves test accuracy, test efficiency and the safety and stability of test loading.

Description

Technical Field

[0001] This application relates to the field of civil engineering technology, specifically to a test method for external load on ultra-large diameter reinforced concrete jacking pipe sections. Background Technology

[0002] Before reinforced concrete jacking pipe sections are put into use, they need to undergo external pressure load testing. Existing external pressure load testing devices for jacking pipe sections lack good pipeline transportation and hoisting and corresponding pipeline fixing mechanisms, making actual testing and installation quite inconvenient. In addition, the lack of intelligent control of external pressure application mechanisms makes it difficult to obtain accurate external pressure load values ​​for concrete and reinforced concrete drainage pipes, resulting in low practical application value for the overall device.

[0003] In existing testing techniques, two parallel strip sleepers are placed beforehand, and the pipe section to be tested is then placed stably on the sleepers before the test begins using equipment on the drainage pipe. Because the sleepers are prone to shifting during pipe placement and testing, this is particularly problematic for large-diameter pipe sections, hindering their safe and rapid placement in the test position. This results in long preparation times, low efficiency, and potential safety hazards. While integrated external pressure load testing mechanisms exist, their functions are limited and their integration is low. Therefore, a novel external pressure load testing system and method for ultra-large diameter reinforced concrete jacking pipe sections is needed to improve testing efficiency and safety.

[0004] Application content

[0005] The purpose of this application is to address the aforementioned problems in the prior art by providing a method for testing the external load on ultra-large diameter reinforced concrete jacking pipe sections.

[0006] To achieve the aforementioned objectives, this application adopts the following technical solution: The external load test method for ultra-large diameter reinforced concrete jacking pipe sections includes the following test steps:

[0007] Step 1: Install the hoisting system: Install two rows of spaced vertical supports symmetrically on both sides of the test area, install hoisting beams between adjacent vertical supports, and install at least two hoisting chutes between the hoisting beams;

[0008] Step 2: Install the base system: Drive micropiles at longitudinal and transverse intervals on the ground of the test area, install the base plate on the micropiles, and install the track and sliding block on the base plate;

[0009] Step 3: Install the support and pressurization system: Install the support system on both sides of the pipe section opening, and use the support system to install the pressurization system at the top of the pipe section;

[0010] Step 4: Install protective panels: Install three protective panels on the test area to enclose the test area, and install a damage scanner on the protective panels;

[0011] Step five, install the water jet assembly: install the connecting beam on both sides of the cross brace, install the track slot beam on the connecting beam, and slide the water jet assembly on the track slot beam;

[0012] Step six, adjust the base system: before the pipe section is in place, adjust the size of the base system according to the size of the pipe section;

[0013] Step seven, hoist the pipe section into place: use the hoisting arc plate to extend into the pipe section from both openings, support the hoisting arc plate on the top of the inner wall of the pipe section, and use the sliding groove to slide the connecting rod and the hoisting arc plate to move the pipe section onto the base system;

[0014] Step eight, load: use the hydraulic device on the loading beam to drive the loading beam to pressurize the top surface of the pipe section until the set load strength is reached;

[0015] Step nine, scan the pipe section cracks: use the damage scanner on the protective plates on both sides of the pipe section to detect and record the pipe section cracks;

[0016] Step ten, break the pipe section: use the water jet assembly to slide and cut the test broken pipe section in place, remove the broken pipe section concrete block to allow the wastewater generated by the water jet assembly operation to flow into the grooves on both sides.

[0017] Further, in step one, the lower part of each sliding groove is connected to a connecting rod, and the lower part of the connecting rod is connected to a hoisting arc plate that matches the curvature of the inner diameter of the pipe section.

[0018] Further, in step two, the base plate is installed with multiple rows of transverse tracks, and at least three rows of longitudinal sliding blocks perpendicular to the transverse tracks are installed on the tracks. Hydraulic rods are installed between the sliding blocks, and the first, second, and third composite beams are respectively embedded and installed on the sliding blocks. The rear block matching the curvature of the outer diameter of the pipe section is installed on the composite beam, and grooves are provided on both sides of the base system for drainage.

[0019] Further, the sliding blocks are concave.

[0020] Further, in step three, vertical columns are installed on the outside of both openings of the pipe section and the two ends of the base system, and a cross brace is connected and installed on the top end of the vertical column. Multiple pressing blocks are installed on the cross brace, and a loading beam is installed at the bottom of the pressing blocks to act on the top surface of the pipe section to achieve loading and unloading.

[0021] Further, in step four, the support system is used as reinforcement, and the support system setting steps include:

[0022] Install a connecting plate on the outside of the vertical column, and use the connecting plate to install the upper end of the diagonal brace;

[0023] The lower end of the inclined brace is fixed to the ground through a connecting plate, and the same stand column has at least two inclined braces, and a horizontal support rod is arranged between the inclined braces;

[0024] The horizontal support rod is crossed at the base system, and the base member is provided with a hole matching the size of the horizontal support rod and is penetrated, and a reinforcing support is installed between the horizontal support rod and the inclined brace.

[0025] Further, the size of the base system is positioned by the sliding block and the rear block, the sliding block is pushed by the hydraulic rod to change the width of the test base system, and different sizes of the rear block are connected to change the curvature of the base, so that the base of the test system can meet the installation of pipe sections of various sizes.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The present application provides a pipe section external load test system comprising a hoisting system, a base system, a pressurizing system, a support system and a protection system, which integrates multiple test functions and realizes high integration;

[0028] 2. The present application uses the hoisting arc plate to cooperate with the hoisting pipe section to reduce the damage of the pipe section in the hoisting process; the reinforcement and adjustment device of the base system is placed below the ground, which reduces the occupation of the test space; the test base can be adjusted according to the size of the pipe section, which can meet the installation of pipe sections of various sizes, ensure complete contact between the base and the pipe section, ensure reasonable stress of the pipe section during the test process, improve the test accuracy; the test pipe section is quickly hoisted into the test position by the integrated hoisting system, which reduces the preparation time of the test and improves the test efficiency; the present application integrates a movable water jet and a breaking protection system, which can be broken in time after the test pipe section is pressurized and broken, avoiding the situation that the pipe section cannot be hoisted and removed due to high damage after the test; the support system is used to form a pressurizing framework, and the pressurizing system is installed above the pressurizing framework, which improves the stability of the pressurizing load and avoids the overturning of the framework during the pressurizing process. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 It is a large-diameter reinforced concrete pipe section external load cross-sectional view of the present application;

[0030] Fig. 2 It is a large-diameter reinforced concrete pipe section external load longitudinal sectional view of the present application;

[0031] Fig. 3 It is a test flowchart of the present application.

[0032] In the diagram, 1. Pipe section; 2. Vertical support; 3. Lifting beam; 4. Slide groove; 5. Connecting rod; 6. Ground; 7. Micropile; 8. Base plate; 9. Track; 10. Sliding block; 11. Hydraulic rod; 12. First combined beam; 13. Second combined beam; 14. Third combined beam; 15. Rear block; 16. Trench; 17. Connecting plate; 18. Column; 19. Diagonal brace; 20. Reinforcing brace; 21. Connecting plate; 22. Protective plate; 23. Damage scanner; 24. Connecting beam; 25. Horizontal brace; 26. Pressure block; 27. Loading beam; 28. Track groove beam; 29. ​​Water jet assembly; 30. Base; 31. Lifting arc plate; 32. Horizontal support rod. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0035] like Figs. 1-3 As shown, the external load test method for this ultra-large diameter reinforced concrete jacking pipe section includes the following test steps:

[0036] Step 1: Install the hoisting system: Install two rows of spaced vertical supports 2 symmetrically on both sides of the test area, install hoisting beams 3 between adjacent vertical supports 2, and install at least two hoisting chutes 4 between the hoisting beams 3;

[0037] In this embodiment, each chute 4 is connected to a connecting rod 5 at its lower part, and the lower part of the connecting rod 5 is connected to a hoisting arc plate 31 that matches the inner diameter curvature of the jacking pipe section 1.

[0038] Step 2: Install the base system: Drive micropiles 7 at longitudinal and transverse intervals on the ground 6 of the test area, install the base plate 8 on the micropiles 7, and install the track 9 and sliding block 10 on the base plate 8.

[0039] In this embodiment, a plurality of transverse tracks 9 are installed on the base plate 8, at least three longitudinal sliding blocks 10 perpendicular to the transverse tracks 9 are installed on the tracks 9, hydraulic rods 11 are installed between the sliding blocks 10, and a first composite beam 12, a second composite beam 13, and a third composite beam 14 are respectively embedded on the sliding blocks 10, a post block 15 matching the outer diameter curvature of the top pipe section 1 is installed on the composite beams, and grooves 16 for drainage are arranged on both sides of the base system.

[0040] Preferably, the sliding blocks 10 are concave.

[0041] Step three, installation of the support and pressurization system: a support system is arranged on both sides of the opening of the pipe section 1, and a pressurization system is installed on the top of the pipe section 1 using the support system;

[0042] In this embodiment, vertical columns 18 are installed on the outer sides of both opening ends of the pipe section 1 and both ends of the base system, cross braces 25 are connected and installed on the top ends of the vertical columns 18, a plurality of pressing blocks 26 are installed on the cross braces 25, and loading beams 27 are installed on the bottom of the pressing blocks 26 to act on the top surface of the top pipe section 1 to achieve loading and unloading.

[0043] Step four, installation of the protective plate 22: three protective plates 22 are installed in the test area to enclose the test area, and a damage scanner 23 is installed on the protective plate 22;

[0044] In this embodiment, the support system is used as reinforcement, and the support system setting steps include:

[0045] A connecting plate 21 is installed on the outer side of the vertical column 18 to install the upper end of the diagonal brace 19;

[0046] The lower end of the diagonal brace 19 is fixed to the ground 6 through the connecting plate 17, and each vertical column 18 has at least two diagonal braces 19, and horizontal support rods 32 are arranged between the diagonal braces 19;

[0047] Holes matching the size of the horizontal support rods 32 are opened in the base system crossing part of the horizontal support rods 32 and the base 30 components, and the holes are passed through, and reinforcing braces 20 are installed between the horizontal support rods 32 and the diagonal braces 19.

[0048] Step five, installation of the water jet assembly 29: connecting beams 24 are respectively installed on both sides of the cross brace 25, a full-length track slot beam 28 is installed on the connecting beam 24, and a water jet assembly 29 is slidably installed on the track slot beam 28;

[0049] Step six, adjustment of the base system: before the pipe section 1 is in place, the size of the base 30 system is adjusted according to the size of the pipe section 1;

[0050] In the embodiment, the size of the base system is positioned by the sliding block 10 and the rear block 15, the width of the test base system is changed by pushing the sliding block 10 with the hydraulic rod 11, and the curvature of the base 30 is changed by using the different sizes of the rear block 15 connected movably, so that the base 30 of the test system can meet the installation of the pipe sections 1 of various sizes.

[0051] Step seven, hoisting the pipe section 1 into position: the hoisting arc plate 31 is inserted into the pipe section 1 from the two openings, the hoisting arc plate 31 is supported on the top of the inner wall of the pipe section 1, the sliding groove 4 is used to drive the connecting rod 5 and the hoisting arc plate 31 to move, and the pipe section 1 is hoisted onto the base system;

[0052] Step eight, loading: the hydraulic device on the loading beam 27 is used to drive the loading beam 27 to press on the top surface of the pipe section 1 until the set loading strength is reached;

[0053] Step nine, scanning the cracks of the pipe section 1: the damage scanner 23 on the protective plate 22 on both sides of the pipe section 1 is used to detect and record the crack conditions of the pipe section 1;

[0054] Step ten, breaking the pipe section 1: the water jet assembly 29 is used to slide and cut the pipe section 1 in situ for test destruction, the concrete block of the broken pipe section 1 is removed, and the waste water generated by the operation of the water jet assembly 29 is collected into the grooves 16 on both sides.

[0055] The part of the present application not described in detail is the prior art, and therefore the present application does not describe it in detail.

[0056] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0057] Although professional terms are used more frequently in this document, the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the present application; any interpretation as any additional limitation is contrary to the spirit of the present application.

[0058] The present application is not limited to the above best embodiment, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any change in shape or structure, any technical solution with the same or similar to the present application falls within the protection scope of the present application.

Claims

1. A test method for external load on ultra-large diameter reinforced concrete jacking pipe sections, characterized in that, The following test steps are included: Step 1: Install the hoisting system: Install two rows of vertical supports (2) symmetrically spaced on both sides of the test area, install hoisting beams (3) between adjacent vertical supports (2), and install at least two hoisting chutes (4) between the hoisting beams (3); Step 2: Install the base system: Drive micropiles (7) with longitudinal and transverse intervals on the ground (6) of the test area, install a base plate (8) on the micropiles (7), and install rails (9) and sliding blocks (10) on the base plate (8); wherein, multiple rows of transverse rails (9) are installed on the base plate (8), at least three rows of longitudinal sliding blocks (10) perpendicular to the transverse rails (9) are installed on the rails (9), hydraulic rods (11) are installed between the sliding blocks (10), and a first combined beam (12), a second combined beam (13), and a third combined beam (14) are embedded and installed on the sliding blocks (10), and a rear block (15) matching the outer diameter curvature of the jacking pipe section (1) is installed on the combined beams, and grooves (16) are set on both sides of the base system for drainage; Step 3: Install the support and pressurization system: Set up a support system on both sides of the opening of the pipe section (1) and use the support system to install the pressurization system on the top of the pipe section (1); wherein, install columns (18) on the outside of the two opening ends of the pipe section (1) and the two ends of the base system, connect and install cross braces (25) at the top of the columns (18), install multiple pressure blocks (26) on the cross braces (25), install loading beams (27) at the bottom of the pressure blocks (26), and use the loading beams (27) to act on the top surface of the jacking pipe section (1) to realize loading and unloading; Step 4: Install protective panels (22): Install three protective panels (22) in the test area to enclose the test area, and install a damage scanner (23) on the protective panels (22). Step 5: Install water jet assembly (29): Install connecting beams (24) on both sides of the cross brace (25), install a continuous track groove beam (28) on the connecting beam (24), and slide the water jet assembly (29) on the track groove beam (28). Step 6: Adjust the base system: Before the pipe section (1) is in place, adjust the system dimensions of the matching base (30) according to the dimensions of the pipe section (1); Step 7, Positioning of the pipe section (1): Using the lifting arc plate (31) to extend from the two openings of the pipe section (1), support the lifting arc plate (31) on the top of the inner wall of the pipe section (1), and use the sliding groove (4) to drive the connecting rod (5) and the lifting arc plate (31) to move, so as to lift the pipe section (1) onto the base system; Step 8, Loading: Use the hydraulic device on the loading beam (27) to drive the loading beam (27) to apply pressure to the top surface of the pipe section (1) until the set loading strength is reached; Step 9: Scan the cracks in the pipe section (1): Use the damage scanner (23) on the protective plate (22) on both sides of the pipe section (1) to detect and record the cracks in the pipe section (1); Step 10, Destroy pipe section (1): Use the water jet assembly (29) to slide and cut the damaged pipe section (1) in situ, remove the concrete block of the destroyed pipe section (1) so that the wastewater generated by the operation of the water jet assembly (29) flows into the trenches (16) on both sides.

2. The method for testing external loads on ultra-large diameter reinforced concrete jacking pipe sections according to claim 1, characterized in that, In step one, each chute (4) is connected to a connecting rod (5) at the bottom, and the lower part of the connecting rod (5) is connected to a hoisting arc plate (31) that matches the inner diameter curvature of the jacking pipe section (1).

3. The method for testing external loads on ultra-large diameter reinforced concrete jacking pipe sections according to claim 1, characterized in that, The sliding block (10) is concave.

4. The method for testing external loads on ultra-large diameter reinforced concrete jacking pipe sections according to claim 1, characterized in that, In step four, a support system is used for reinforcement. The steps for setting up the support system include: Install a connecting plate (21) on the outside of the column (18), and use the connecting plate (21) to install the upper end of the diagonal brace (19); The lower end of the diagonal brace (19) is fixed to the ground (6) by the connecting plate (17). The same column (18) has at least two diagonal braces (19), and a horizontal support rod (32) is provided between the diagonal braces (19). Holes matching the size of the horizontal support rod (32) are made in the horizontal support rod (32) at the intersection with the base system and in the base (30) component and are passed through it. A reinforcing brace (20) is installed between the horizontal support rod (32) and the diagonal brace (19).

5. The method for testing external loads on ultra-large diameter reinforced concrete jacking pipe sections according to claim 1, characterized in that, In step six, the dimensions of the base system are positioned by sliding block (10) and rear block (15). The width of the test base system is changed by using hydraulic rod (11) to push sliding block (10). At the same time, the curvature of the base (30) is changed by using rear blocks (15) of different sizes that are connected in a movable manner, so that the base (30) of the test system can meet the installation of pipe sections (1) of various sizes.

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