Load experiment method for aqueduct making machine

Abstract

The invention provides a load experiment method for a groove making machine. The experimental method comprises the following steps: setting a load preloading coefficient of the aqueduct making machine, dividing load grades, and calculating a load counterweight of each load grade according to the preloading coefficient; the load experiment device for the grooving machine is built, the experiment device comprises a grooving machine main beam, an outer mold assembly hoisted at the lower end of the grooving machine main beam and end sealing plates covering the two ends of the outer mold assembly, and the end sealing plates and the outer mold assembly are closed to form a closed loading space; monitoring points are arranged on the main beam of the groove making machine; starting a loading experiment, filling water into the loading space step by step according to load grading, and performing data monitoring in real time through the monitoring point until the load balance weight of each load grading is reached; according to the monitored data, judging whether the load experiment of the aqueduct making machine is qualified or not; unloading the load; and completing a load experiment. According to the invention, the investment of heavy hoisting equipment is reduced, the high-altitude operation time of personnel is reduced, and the potential safety hazard is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy aqueduct construction, and particularly to a method for conducting a load test on a flume-making machine. Background Art

[0002] Currently, the main research direction of the construction equipment for the outer irrigation area aqueduct is the flume-making machine, and the load test of the flume-making machine is an essential process in the aqueduct construction. The purpose is to eliminate the influence of the inelastic deformation of the main beam of the flume-making machine, detect the safety of the flume-making machine, and ensure the construction safety. The existing method is to select large-density materials such as sandbags or steel as the load objects to conduct load test on the main beam system of the flume-making machine. This requires the use of heavy lifting equipment and transportation equipment, and the test process is time-consuming and laborious. Moreover, there are certain safety hazards in preloading with sandbags or gravel sand belts. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for conducting a load test on a flume-making machine that can eliminate the inelastic deformation of the main beam of the flume-making machine and ensure construction safety.

[0004] The technical solution of the present invention is: A method for conducting a load test on a flume-making machine, comprising:

[0005] Step 1: Set the load preloading coefficient of the flume-making machine and divide the load levels. Calculate the load counterweight for each load level according to X times the load of each span based on the preloading coefficient.

[0006] Step 2: Build a load test device for the flume-making machine. The test device includes a main beam of the flume-making machine, an outer mold assembly hoisted at the lower end of the main beam of the flume-making machine, and end plates sealed at both ends of the outer mold assembly. The end plates and the outer mold assembly are closed to form a closed loading space; arrange monitoring points on the main beam of the flume-making machine.

[0007] Step 3: Start the loading test. Gradually fill the loading space with water for loading according to the load levels, and conduct real-time data monitoring through the monitoring points until the load counterweight of each load level is reached.

[0008] Step 4: Determine whether the load test of the flume-making machine is qualified according to the monitored data.

[0009] Step 5: Unload the load; complete the load test.

[0010] In the above solution, water is used instead of sand or steel as the material for the load test of the flume-making machine, and the purified water from the construction water source is pumped by a water pump for step-by-step loading, reducing the investment in heavy lifting equipment and transportation equipment, reducing the high-altitude operation time of personnel, and reducing the safety hazards.

[0011] Preferably, the monitoring points are distributed at both ends of the outer mold assembly 1 and at the 1 / 4 span, 1 / 2 span, and 3 / 4 span of the main beam of the flume-making machine.

[0012] Preferably, calculate the elastic deformation and inelastic deformation of the main beam of the grooving machine according to the monitoring data, calculate the camber according to the elastic deformation of the main beam of the grooving machine, and adjust the elevation of the external mold assembly according to the camber until the load test is qualified.

[0013] Preferably, the following steps are required during the loading process: measure the elevation of the monitoring points before the loading test; and / or measure the elevation of the monitoring points after the graded loading; and / or measure the elevation of the monitoring points every H1 hours after loading to 100% of the load grading; and / or measure the elevation of the monitoring points after the unloading time reaches H2; H is time, unit: hour.

[0014] Preferably, the difference between the elevation of each monitoring point before loading and the elevation of each monitoring point after unloading is equal to the inelastic deformation of the main beam of the grooving machine; the difference between the elevation value of each monitoring point after full load and the elevation of each monitoring point after unloading is the elastic deformation of the main beam of the grooving machine, and then verify whether the inelastic deformation and elastic deformation meet the design requirements according to the empirical formula. If it does not meet the design requirements, adjust the elevation of the monitoring points until the design requirements are met.

[0015] Preferably, set the settlement of the main beam of the grooving machine; after each stage of loading is completed, monitor the settlement of the main beam of the grooving machine after an interval of H3. If the settlement is less than the set value, proceed to the next stage of loading.

[0016] Preferably, in step five, after all the load gradings are fully loaded, wait for a time H4 and then unload step by step.

[0017] Preferably, the unloading sequence is carried out in the reverse order of loading.

[0018] Preferably, when one of the following conditions is met, it is determined that the load test of the grooving machine is qualified:

[0019] The average settlement of each monitoring point in the first 24 hours is less than 1 mm;

[0020] The average settlement of each monitoring point in the first 72 hours is less than 5 mm.

[0021] Preferably, the load grading during the loading test is: 0 → 60% → 80% → 100%. After the load test is completed, unload step by step in the reverse direction of the above load grading.

[0022] Compared with the related technology, the beneficial effects of the present invention are:

[0023] 1. Use water instead of sand or steel as the material for the load test of the grooving machine. Pump the purified water from the construction water source for step-by-step loading until full load. Calculate the elastic deformation and inelastic deformation of the main beam of the grooving machine according to the monitoring data. During construction, set the camber according to the elastic deformation value of the main beam of the grooving machine, and readjust the elevation of the formwork according to this camber value until the design requirements are met, thereby improving the construction quality and eliminating the inelastic deformation of the main beam of the grooving machine actually used;

[0024] 2. On the premise of ensuring the project quality, the construction period is greatly shortened, the construction cost is reduced, resources are saved to the greatest extent, and the negative impact on the environment is reduced, meeting the requirements of green construction, and having good economic and social benefits;

[0025] 3. Use water instead of sand or steel as the material for the load test of the grooving machine. Pump the purified water from the construction water source for step-by-step loading, reducing the investment in heavy lifting equipment and transportation equipment, reducing the high-altitude operation time of personnel, and reducing potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the grooving machine load test device for the invention;

[0027] Figure 2 For Figure 1 Side view.

[0028] In the drawings: 1. Outer mold assembly; 2. End plate; 3. Waterproof tarpaulin; 4. Main beam of grooving machine; 5. Water pipe; 6. Water pump; 7. Loading space. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. For the convenience of narration, words such as "upper", "lower", "left", and "right" in the following text only represent the same directions as the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0030] A grooving machine load test method provided in this embodiment includes the following steps:

[0031] S1. Control the tonnage and load grading of the load test. According to the requirements of the "Technical Specification for Construction of Highway Bridges and Culverts", set the preloading coefficient to 1.2, and calculate the load counterweight according to 1.2 times the upper load of each span of the main beam of the grooving machine.

[0032] S2. Build the grooving machine load test device, such as Figure 1 And Figure 2As shown in the figure, the experimental device includes the main beam 4 of the grooving machine, the outer mold assembly 1 hoisted at the lower end of the main beam 4 of the grooving machine, and the end plates 2 sealed at both ends of the outer mold assembly 1. The end plates 2 and the outer mold assembly 1 are closed to form a closed loading space 7. Monitoring points are arranged on the main beam 4 of the grooving machine. A total station is used to accurately loft the monitoring points. The monitoring points are distributed at both ends of the outer mold assembly 1 and at the 1 / 4 span, 1 / 2 span, and 3 / 4 span of the main beam 4 of the grooving machine, and four points are arranged on each cross-section.

[0033] A waterproof raincloth 3 is laid on the inner wall of the loading space 1 formed by the outer mold assembly 1 and the end plates 2 so that the loading space 1 can be filled with water, and marks (such as Figure 2 shown) are set in the loading space 1 to determine the water filling height of each graded load. As Figure 1 shown, a water pipe 5 is connected to the outside of the loading space, and a water pump 6 is arranged on the water pipe 5.

[0034] S3. Start the loading experiment, fill water into the loading space for loading step by step according to the load grading, and monitor the data in real time through the monitoring points until the load counterweight of each load grading is reached.

[0035] For the load experiment, water is pumped into the loading space by a water pump to simulate the load distribution during the casting of the concrete in the trough body of the outer mold assembly 1. When loading, clean water from the construction water source area is pumped by the water pump. The experimental load grading is: 0→60%→80%→100%, and after the load experiment is completed, it is unloaded step by step in the reverse direction.

[0036] The following steps need to be carried out during the loading process: monitor the elevation of the monitoring points before the loading experiment; and / or, monitor the elevation of the monitoring points after the graded loading; and / or, after loading to 100% of the load grading, monitor the elevation of the monitoring points every H1 hours; and / or, monitor the elevation of the monitoring points after the unloading time reaches H2; and / or, set the settlement amount of the main beam 4 of the grooving machine; after each stage of loading is completed, monitor the settlement amount of the main beam 4 of the grooving machine after an interval of time H3. If the settlement amount is less than the set value, carry out the next stage of loading, use the staying time to measure and observe the safety of the main beam 4 of the grooving machine, and make good measurement records. H is time, unit: hour. In this embodiment, H1 = 24 hours, H2 = 6 hours, H3 = 12 hours, and the preset value of the settlement amount is 2 mm.

[0037] During the water filling and loading experiment process, the main beam 4 of the grooving machine and the outer mold assembly 1 should be inspected to check the settlement and change conditions of the main beam 4 of the grooving machine. Once an abnormality occurs, the loading should be stopped immediately. Analyze the reasons and carry out remedial treatment in time.

[0038] The load experiment of the grooving machine belongs to high-altitude operation. Therefore, during the loading process, the personal safety of the construction personnel should be ensured. It is necessary to set up a construction platform, hang a safety net, the construction personnel should wear safety helmets and hang safety ropes.

[0039] S4. Determine whether the load test of the grooving machine is qualified according to the monitored data. The load test of the grooving machine is determined to be qualified when one of the following conditions is met:

[0040] The average settlement of each monitoring point in the initial 24 hours is less than 1 mm;

[0041] The average settlement of each monitoring point in the initial 72 hours is less than 5 mm.

[0042] During construction, set the camber according to the elastic deformation value of the main beam of the grooving machine, and re-adjust the formwork elevation according to this camber value until the load test of the grooving machine is qualified and meets the design requirements.

[0043] S5. Unload the load: After all the loading is completed, wait for 24 to 72 hours, and then unload step by step. Measure and record in detail during unloading, and the unloading sequence is carried out in the reverse order of loading.

[0044] S6. Complete the load test: After the load test is completed, sort out the data according to the measurement records and analyze the relevant data; the difference between the elevation value of each point before loading and the elevation after unloading is the inelastic deformation amount of the main beam of the grooving machine; the difference between the elevation value of each point at full load and the elevation after unloading is the elastic deformation amount of the main beam of the grooving machine, and calculate the elastic deformation and inelastic deformation amounts according to the empirical formula.

[0045] The present invention uses water instead of sand or steel as the material for the load test of the grooving machine, and uses a water pump to extract the purified water from the construction water source for step-by-step loading until full load. Calculate the elastic deformation and inelastic deformation amounts during the loading process. During construction, set the camber according to the elastic deformation value of the main beam of the grooving machine, and re-adjust the formwork elevation according to this camber value to meet the design requirements. During the monitoring process of the load test after all the loading is completed, the average settlement of each monitoring point in the initial 24 hours is less than 1 mm, the average settlement of each monitoring point in the initial 72 hours is less than 5 mm, and the preloading of the main beam of the grooving machine is qualified.

[0046] On the premise of ensuring the project quality, the present invention greatly shortens the construction period, reduces the construction cost, saves resources to the greatest extent and reduces the negative impact on the environment, meets the requirements of green construction, and has good economic and social benefits.

[0047] The present invention uses water instead of sand or steel as the material for the load test of the grooving machine, and uses a water pump to extract the purified water from the construction water source for step-by-step loading, reducing the investment in heavy lifting equipment and transportation equipment, reducing the high-altitude operation time of personnel, and reducing the safety hazards.

[0048] The above are only embodiments of the present invention, and do not thereby limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall equally be included within the patent protection scope of the present invention.

Claims

1. A load test method for a slotting machine, characterized in that, Including: Step 1: Set the preloading coefficient of the slot-making machine and divide the load into levels. Calculate the load counterweight for each load level according to X times the load of each span based on the preloading coefficient. Step 2: Build the load test device for the slot-making machine. The test device includes the main beam of the slot-making machine, the outer mold assembly hoisted at the lower end of the main beam of the slot-making machine, and the end plates sealed at both ends of the outer mold assembly. The end plates and the outer mold assembly form a closed loading space. Arrange monitoring points on the main beam of the slot-making machine. Step 3: Start the loading test. Gradually fill water into the loading space for loading according to the load levels, and conduct real-time data monitoring through the monitoring points until the load counterweight of each load level is reached. Step 4: Determine whether the load test of the slot-making machine is qualified according to the monitored data. Step 5: Unload the load; complete the load test.

2. The load test method of the grooving machine according to claim 1, wherein The monitoring points are distributed at both ends of the outer mold assembly 1 and at the 1 / 4 span, 1 / 2 span, and 3 / 4 span of the main beam of the slot-making machine.

3. The load test method of the grooving machine according to claim 1, wherein Calculate the elastic deformation and inelastic deformation of the main beam of the slot-making machine according to the monitored data, calculate the camber according to the elastic deformation of the main beam of the slot-making machine, and adjust the elevation of the outer mold assembly until the load test is qualified.

4. The method for conducting a load test on a grooving machine according to claim 1, wherein, The following steps are required during the loading process: Monitor the elevation of the monitoring points before the loading test; and / or, monitor the elevation of the monitoring points after the graded loading; and / or, after loading to 100% of the load level, monitor the elevation of the monitoring points every H1 hours; and / or, monitor the elevation of the monitoring points after the unloading time reaches H2; H is time, unit: hour.

5. The method for conducting a load test on a slot-making machine according to claim 4, wherein, The difference between the elevation of each monitoring point before loading and the elevation of each monitoring point after unloading is equal to the inelastic deformation of the main beam of the slot-making machine; the difference between the elevation values of each monitoring point after full load and the elevation of each monitoring point after unloading is the elastic deformation of the main beam of the slot-making machine. Then, verify whether the inelastic deformation and elastic deformation meet the design requirements according to the empirical formula. If they do not meet the design requirements, adjust the elevation of the monitoring points until the design requirements are met.

6. The method for load test of the grooving machine according to claim 4, wherein, Set the settlement of the main beam of the slot-making machine; after each stage of loading is completed, monitor the settlement of the main beam of the slot-making machine after an interval of H3. If the settlement is less than the set value, proceed to the next stage of loading.

7. The load test method of the grooving machine according to claim 1, wherein, In Step 5, after all load levels are fully loaded, wait for a time of H4 and then unload step by step.

8. The method for load test of the grooving machine according to claim 6, wherein The unloading sequence is carried out in the reverse order of loading.

9. The method for load test of the slot-making machine according to claim 1, wherein When one of the following conditions is met, it is determined that the load test of the slot-making machine is qualified: The average settlement of each monitoring point in the first 24 hours is less than 1 mm; The average settlement of each monitoring point in the first 72 hours is less than 5 mm.

10. The load test method of the grooving machine according to claim 1, wherein, The load levels during the loading test are: 0 → 60% → 80% → 100%. After the load test is completed, unload step by step in the reverse direction of the above load levels.

Images