Super-large-ton static load test device
By designing an ultra-large tonnage static load testing device, the problems of tonnage limitations and safety hazards of existing devices were solved, and the safety and stability of ultra-large tonnage load experiments were achieved, improving measurement accuracy and result accuracy.
Patent Information
- Application Number
- CN202422955676.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The existing static load testing equipment has a maximum tonnage of no more than 4,000 tons, which cannot meet the needs of ultra-large tonnage testing, and there are also safety hazards and insufficient measurement accuracy.
An ultra-large tonnage static load testing device was designed, including a load foundation mechanism, a static load test support mechanism, and a test measurement mechanism. By laying components such as crushed stone layer, tofu board, box girder, support main beam, test pile, and jack, and adding load materials and sensors, a stable support structure is formed, and accurate measurements are performed through displacement sensors and load pressure sensors.
This approach ensures the safety and stability of ultra-large tonnage load experiments, reduces measurement errors, and improves the accuracy of experimental results.
Smart Images
Figure CN223510386U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to static load testing device field, concretely is super tonnage static load testing device. BACKGROUND
[0002] Single pile vertical compression static load test is suitable for determining single pile vertical compression bearing capacity. The test principle is to apply vertical pressure on the pile step by step, and the settlement of the pile top with time is observed to determine the corresponding pile vertical compression bearing capacity test method. When the pile body is embedded with strain, displacement sensor or displacement rod, the strain of the pile body or the cross section displacement of the pile body can be measured, and the layered side resistance and end resistance of the pile are calculated.
[0003] But the existing static load testing device construction can test the maximum tonnage of no more than 4000t, the load amount of test can be carried out is limited, cannot satisfy the test of super tonnage, the current static load test in the design and implementation does not seriously consider the stability of test system foundation and the safety factor in each device construction, has greater safety hidden danger, and the precision of existing measurement observation device is limited and the related reference point and reference point are less, cannot effectively eliminate the observation error.
[0004] Therefore, the technical personnel in the prior art provide super tonnage static load testing device to solve the problems raised in the above background. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at providing super tonnage static load testing device, meets the requirement of super tonnage load experiment, also considers higher safety and stability of test system, and the data of experimental detection reduces the measurement error on the basis of adding reference system, makes the result more accurate, to solve the problems raised in the above background.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] Super tonnage static load testing device, comprising:
[0008] Load foundation mechanism and static load test support mechanism arranged above the load foundation mechanism,
[0009] Wherein, the both sides of the static load test support mechanism are equipped with test measurement mechanism, and the upper side of the static load test support mechanism is equipped with load material.
[0010] As a further scheme of the utility model: the load foundation mechanism specifically comprises: the gravel layer laid on the ground, two groups of support casings are embedded in the inside of the gravel layer, the number of each group of support casings is four, and the cavity in the support casing is filled with sandstone and compacted multiple times.
[0011] As a further scheme of the utility model: the static load test support mechanism, specifically includes: two parallel bean curd board, two the bean curd board is set up at two groups of support casing top, and the top of bean curd board is equipped with box girder, two the box girder between being equipped with support main beam, two the box girder top is commonly equipped with secondary beam subassembly, the support main beam is set up in secondary beam subassembly bottom end face intermediate position, and support main beam below is equipped with test pile, the top of test pile is equipped with jack bottom steel sheet, and the top surface of jack bottom steel sheet is equipped with jack, the top of jack is equipped with jack top steel sheet and L hook, and jack top steel sheet and L hook are connected with support main beam.
[0012] As a further scheme of the utility model: the test measurement mechanism, specifically includes: the reference beam fixed at the both sides of test pile, be connected with displacement sensor between the reference beam and test pile, and be equipped with L type reinforcing bar between displacement sensor and test pile, and be equipped with pile head part measurement settlement steel ruler on the top of L type reinforcing bar, be equipped with load pressure sensor between the top of jack and jack top steel sheet and L hook, one side of secondary beam subassembly is equipped with loading oil pump, and loading oil pump is connected through oil pipe between loading oil pump and jack, the top of loading oil pump is equipped with oil pump pressure gauge.
[0013] As a further scheme of the utility model: the load material, specifically includes: the load steel sheet set up in the top surface of secondary beam subassembly, the top of load steel sheet is equipped with load concrete test block.
[0014] As a further scheme of the utility model: the secondary beam subassembly includes twenty parallelly placed secondary beams.
[0015] As a further scheme of the utility model: the thickness of the gravel layer is 500mm-800mm, and the gravel particle size of the gravel layer is less than 150mm.
[0016] Compared with the prior art, the utility model has the advantages that:
[0017] 1, this application meets the super large tonnage load experiment requirement also takes into account the higher safety and stability of test system, and the data of experimental detection reduces the measurement error on the basis of adding reference system makes the result more accurate. BRIEF DESCRIPTION OF DRAWINGS
[0018] Fig. 1 It is structural schematic diagram of super large tonnage static load test device;
[0019] Fig. 2 It is one side view of super large tonnage static load test device;
[0020] Fig. 3 It is plan view of super large tonnage static load test device.
[0021] Figure: 1, support girder; 2, secondary beam assembly; 3, load pressure sensor; 4, box girder; 5, jack top steel plate and L hook; 6, reference beam; 7, test pile; 8, jack; 9, jack bottom steel plate; 10, pile head part measurement settlement steel ruler; 11, displacement sensor; 12, bean curd plate; 13, load steel plate; 14, load concrete test block; 15, level; 16, reference control point; 17, support casing; 18, gravel layer; 19, iron foot; 20, oil pump pressure gauge. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0023] As mentioned in the background art of the present application, it is found through research that the existing static load test device can test a maximum tonnage of no more than 4000t, the load amount that can be tested is limited, and it cannot meet the test of super large tonnage, the stability of the test system and the safety factor in the construction of each device are not seriously considered in the design and implementation of the current static load test, there is a great safety hazard, at the same time, the existing measurement and observation device has limited precision and fewer reference points and reference points, which cannot effectively eliminate the observation error, and there is a certain defect.
[0024] In order to solve the above-mentioned defects, the present application discloses a super large tonnage static load test device, which meets the requirements of super large tonnage load experiment, and also takes into account the higher safety and stability of the test system, and the experimental data reduces the measurement error on the basis of adding reference system, so that the result is more accurate.
[0025] The scheme of the present application will be described in detail below in combination with the drawings.
[0026] Please refer to Figs. 1-3 In the embodiments of the present application, the super large tonnage static load test device comprises a load foundation mechanism and a static load test support mechanism arranged above the load foundation mechanism, wherein test measurement mechanisms are arranged on both sides of the static load test support mechanism, and a load material is arranged above the static load test support mechanism. The present application meets the requirements of super large tonnage load experiment, and also takes into account the higher safety and stability of the test system, and the experimental data reduces the measurement error on the basis of adding reference system, so that the result is more accurate.
[0027] In the embodiment, the load foundation mechanism specifically comprises: a gravel layer 18 laid on the ground, two groups of support casings 17 are embedded in the gravel layer 18, the number of each group of support casings 17 is four, and the cavities in the support casings 17 are filled with sand and gravel and compacted multiple times. The load foundation mechanism can effectively provide a good support surface for the test device.
[0028] In the embodiment, the static load test support mechanism specifically comprises: two parallel tofu boards 12, the two tofu boards 12 are respectively arranged at the top ends of the two groups of support casings 17, the top end of each tofu board 12 is provided with a box girder 4, a support main beam 1 is arranged between the two box girders 4, a secondary beam assembly 2 is arranged at the top ends of the two box girders 4, the support main beam 1 is arranged at the middle position of the bottom end face of the secondary beam assembly 2, a test pile 7 is arranged below the support main beam 1, a jack bottom steel plate 9 is arranged at the top end of the test pile 7, a jack 8 is arranged at the top end face of the jack bottom steel plate 9, a jack top steel plate and an L hook 5 are arranged at the top of the jack 8, and the jack top steel plate and the L hook 5 are connected with the support main beam 1. The static load test support mechanism can effectively provide a good support foundation for the test measurement mechanism.
[0029] In the embodiment, the test measurement mechanism specifically comprises: reference beams 6 fixed on both sides of the test pile 7, displacement sensors 11 connected between the reference beams 6 and the test pile 7, L-shaped steel bars arranged between the displacement sensors 11 and the test pile 7, pile head position measurement settlement steel rulers 10 arranged at the top of the L-shaped steel bars, load pressure sensors 3 arranged between the top of the jack 8 and the jack top steel plate and the L hook 5, a loading oil pump arranged on one side of the secondary beam assembly 2 to pressurize and depressurize the jack 8, the loading oil pump and the jack 8 are connected through an oil pipe, an oil pump pressure gauge 20 is arranged at the top of the loading oil pump to reflect the bearing pressure of the jack 8. The test measurement mechanism can quickly and accurately complete the static load test.
[0030] In the embodiment, the load material specifically comprises: a load steel plate 13 arranged at the top end face of the secondary beam assembly 2, and a load concrete test block 14 arranged at the top end of the load steel plate 13.
[0031] In the embodiment, the secondary beam assembly 2 comprises twenty parallel arranged secondary beams.
[0032] The working principle of the utility model is: in use, first, lay the load foundation mechanism, specifically, clean the field around the test pile 7, remove the soft mud and the like, then replace and compact with dense soil, mark the position and quantity of the support casing 17 according to the preset requirements, and use the drilling machine to pre-drill the hole guide hole, then use the hammer to sequentially set each support casing 17 to the specified elevation (to prevent the soil squeezing effect, the setting sequence is from the center to the two sides), after the setting is completed, check the elevation of the support casing 17, fill the cavity in the support casing 17 with sand and stone, and compact multiple times. After the setting of the support casing 17 is completed, the preset foundation area is also needed to be arranged and a layer of 15mm*6m*1.5m steel plate is laid, then the gravel layer 18 is laid, the thickness of the gravel layer 18 is required to be 500mm-800mm (the particle size of the gravel should be less than 150mm), after the laying is completed, the gravel layer is compacted layer by layer and the gravel surface is leveled to ensure the same elevation, finally, the slope on the four sides is left with an inclination not greater than 45° to prevent the gravel from sliding.
[0033] Then, erect the static load test support mechanism, specifically, lay the bean curd plate 12 on the gravel layer 18 as the support of the box girder 4, in this embodiment, the bean curd plate 12 refers to the multiple layers of ordinary steel plates stacked up and down, the bean curd plate 12 is required to be laid with the layers of steel plates staggered to prevent stress concentration and subsidence. At the same time, the plane elevation is also checked during the laying of each layer, after the laying of the steel plate is completed, the box girder 4 on both sides and the iron foot 19 supporting the support girder 1 are added. Then, the upper device of the test pile 7 is added, first, lay 20-30mm thick cement powder on the pile head of the test pile 7 and level it, then erect the jack bottom steel plate 9, the size of the jack bottom steel plate 9 is 2.3m*2.3m*70mm. Then, place the jack 8, which is evenly arranged according to the center of the test pile 7. Then, erect the reference beam 6 on both sides of the test pile 7, the size is 16m*650mm*520mm, first, pound the vertical support of the reference beam 6 at both ends and pour 20mm concrete near the vertical support, then adjust the position of the reference beam 6 to ensure that it is horizontal and then firmly weld it. Then, erect the jack top steel plate and L hook 5, wherein the jack top steel plate and L hook 5 include the top steel plate and the L hook, when erecting, first place the center of the top steel plate on the jack 8, then erect 3-4 support girders 1 and support them on the iron foot 19, the top steel plate is tightly clamped under the support girder 1 through the four L hooks welded on the support girder 1. After the support girder 1 and the box girder 4 are erected, the secondary beam assembly 2 is erected, that is, mark on the support girder 1 and the box girder 4 and evenly lay the secondary beam on them.
[0034] Next, load the load material, specifically, first, the load steel plate 13 is divided into two parts according to the preset rules, the lower half is laid according to 2*14*17 layers, the upper half is rotated 90° according to the original direction and laid according to 2*6*33 layers, a total of 634 load steel plates 13; finally, the load concrete test block 14 with a size of 1.2m*1.2m*1.2m is laid, the first part is laid according to 9*10*2 layers, then the second part is laid according to 8*9*2 layers, and the last layer is laid according to 7*8*2 layers, a total of 436 load concrete test blocks 14. Finally, the total load quality is 5231t.
[0035] After the load is completed, the load pressure sensor 3 needs to be erected, which needs to be placed in the center one by one according to the jack 8, and if there is a gap between the load pressure sensor 3 and the top steel plate, a small steel plate with a size of 300mm*300mm*15mm needs to be placed to fill the gap. After the above erection is completed, two L-shaped reinforcing bars are extended from both sides of the pile head of the test pile 7 and provided with a pile head settlement measuring ruler 10 for assisting in observing the pile head settlement of the test pile 7 and providing an effective reference value for detecting displacement, then a level 15 is erected on one side of the test pile 7 and a reference control point 16 is determined. After the level 15 is stably erected, the pile head settlement measuring ruler 10 needs to be zeroed, finally, a Z-shaped support structure made of H20 steel is used to support the displacement sensor 11, and the probe of the displacement sensor 11 is placed on the reference beam 6 to observe the settlement of the pile head of the test pile 7, and zeroing is required before formal experiment. It should be noted that the level 15 is used to observe the scale of the pile head settlement measuring ruler 10, and the settlement of the pile head of the test pile 7 is observed directly, and the reference control point 16 with elevation is used to ensure that the observation height of the level 15 does not change, and the level 15 is corrected after the change. The level needs to be erected within the range of 6-10m of the device 6 to ensure that the scale of the pile head settlement measuring ruler 10 can be clearly measured, and also to ensure that the instrument elevation does not change due to the settlement of the static load foundation, and the reference control point 16 is the same.
[0036] After the static load test starts, the jack 8 is pressurized and lifted using the loading oil pump, and according to the loading process, the load is loaded to the preset stage, and after stabilization, the readings of the displacement sensor 11 on the reference beam 6 are observed, then the readings of the pile head settlement measuring ruler 10 on both sides of the test pile 7 are observed through the level 15, and the accurate readings are obtained by correcting through the reference control point 16, finally, the readings of the pile head settlement measuring ruler 10 and the displacement sensor 11 are averaged to obtain more accurate settlement readings, then the loading plan is followed to load and unload in stages, and the settlement data at each stage is summarized and a report is written.
[0037] Through the above erection scheme, the static load test device of the application meets the requirements of super large tonnage load experiment, and also considers higher safety and stability of the test system, and the data of the experimental detection reduces the measurement error on the basis of adding the reference system, so that the result is more accurate.
[0038] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.
[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A static load testing device for ultra-large tonnage loads, characterized in that, include: The load foundation mechanism, and the static load test support mechanism disposed above the load foundation mechanism. The static load test support mechanism is provided with test measurement mechanisms on both sides, and load materials are provided on the top of the static load test support mechanism.
2. The ultra-large tonnage static load testing device according to claim 1, characterized in that, The load foundation mechanism specifically includes: a gravel layer (18) laid on the ground, and two sets of support casings (17) are buried inside the gravel layer (18). Each set of support casings (17) consists of four casings, and the cavities inside the support casings (17) are filled with sand and gravel and compacted multiple times.
3. The ultra-large tonnage static load testing device according to claim 2, characterized in that, The static load test support mechanism specifically includes: two parallel tofu boards (12), the two tofu boards (12) are respectively set on the top of two sets of support sleeves (17), and the top of the tofu board (12) is provided with a box beam (4), the two box beams (4) are provided with a main support beam (1), the top of the two box beams (4) are jointly provided with a secondary beam assembly (2), the main support beam (1) is set at the middle position of the bottom end face of the secondary beam assembly (2), and a test pile (7) is provided below the main support beam (1), the top of the test pile (7) is provided with a bottom steel plate (9) of a jack, and the top surface of the bottom steel plate (9) of the jack is provided with a jack (8), the top of the jack (8) is provided with a top steel plate of the jack and an L-hook (5), and the top steel plate of the jack and the L-hook (5) are connected to the main support beam (1).
4. The ultra-large tonnage static load testing device according to claim 3, characterized in that, The test measurement mechanism specifically includes: a reference beam (6) fixed on both sides of the test pile (7), a displacement sensor (11) connected between the reference beam (6) and the test pile (7), and an L-shaped steel bar between the displacement sensor (11) and the test pile (7), and a settlement measuring steel ruler (10) for the pile head is provided at the top of the L-shaped steel bar; a load pressure sensor (3) is provided between the top of the jack (8) and the top steel plate of the jack and the L-hook (5); a loading oil pump is provided on one side of the secondary beam assembly (2), and the loading oil pump is connected to the jack (8) through an oil pipe; and an oil pump pressure gauge (20) is provided at the top of the loading oil pump.
5. The ultra-large tonnage static load testing device according to claim 4, characterized in that, The load material specifically includes: a load-bearing steel plate (13) set on the top surface of the secondary beam assembly (2), and a load-bearing concrete test block (14) is provided on the top of the load-bearing steel plate (13).
6. The ultra-large tonnage static load testing device according to claim 5, characterized in that, The secondary beam assembly (2) comprises twenty secondary beams placed side by side.
7. The ultra-large tonnage static load testing device according to claim 6, characterized in that, The thickness of the crushed stone layer (18) is 500mm-800mm, and the particle size of the crushed stone in the crushed stone layer (18) is less than 150mm.