CN210917508U - Large-tonnage foundation pile static load high-precision detection device - Google Patents
Large-tonnage foundation pile static load high-precision detection device Download PDFInfo
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- CN210917508U CN210917508U CN201921908161.5U CN201921908161U CN210917508U CN 210917508 U CN210917508 U CN 210917508U CN 201921908161 U CN201921908161 U CN 201921908161U CN 210917508 U CN210917508 U CN 210917508U
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Abstract
The utility model belongs to the technical field of foundation pile quality testing technique and specifically relates to a large-tonnage foundation pile static load high accuracy detection device, including support column, experimental stake, girder, steel pile cap, steel bearing plate, jack, aversion meter, level sensor, balancing weight, oil pump, static load detector etc, the recess on support column upper portion has been located to the cover has been seted up to the girder bottom surface, in the recess the roof with the support column upper surface pushes up mutually, still be equipped with the stiffening rib with support column welded fastening on the support column, the terminal surface and the girder bottom surface welded fastening that the stiffening rib is close to the girder, jack and oil pump electric connection, aversion meter and static load detector electric connection, level sensor links to each other with the input of the computer that is equipped with data processing software. An object of the utility model is to provide a large-tonnage foundation pile static load high accuracy detection device to solve the shortcoming that large-tonnage foundation pile static load test exists among the prior art, and realize reducing error interference, improve the purpose of test precision.
Description
Technical Field
The utility model relates to a pile foundation quality testing technical field especially relates to a large-tonnage foundation pile static load high accuracy detection device.
Background
In recent years, the bridge construction in China develops rapidly, and especially the long and large bridge which is already constructed and built attracts attention from the world. The foundation is the key to success or failure of bridge engineering. The application of pile foundations in foundation engineering is the most extensive. In bridge construction, large-tonnage cast-in-place piles are the most common foundation form which is most easily adopted by constructors, and foundation piles with ultimate bearing capacity exceeding 15000kN are generally called large-tonnage foundation piles in engineering. The evaluation of pile-forming quality is the most common, and the most intuitive detection means is static load test. The key and difficult points of the large-tonnage static load test are selection, installation and placement of the counterforce device and treatment of soil around the pile. The large-tonnage pile foundation static load test must pay attention to the following points: the bearing capacity requirement of the foundation soil under the pier of the ballast platform is met, the sufficient width and depth range of the field soil layer must be compacted, and the support columns are ensured to generate uniform and relatively small deformation; the structural strength of the steel beam must be sufficient; the balancing weights are placed simultaneously in two directions symmetrically by taking the central line of the test pile as a symmetry axis, and the upper and lower layers of balancing weights are mutually overlapped and installed in a staggered way; the pile head of the test pile must be reinforced, and the pile head of the test pile cannot be damaged in the test process. In addition, the main beam and the balancing weight are directly exposed in the external environment, so that the interference of external factors cannot be guaranteed, and the static load test precision of the test pile is not high.
Disclosure of Invention
The utility model aims at solving the problem of large-tonnage pile foundation static load test in the prior art
The static load high-precision detection device for the large-tonnage foundation pile is provided due to the defects.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a static load high-precision detection device for a large-tonnage foundation pile comprises two support columns which are arranged in parallel, a test pile is arranged between the two parallel support columns, and a main beam is fixedly and horizontally arranged at the tops of the two support columns; one end of the test pile is positioned inside a foundation pit, one end of the test pile, which is far away from the foundation pit, is provided with a steel pile cap, the upper surface of the steel pile cap is fixedly connected with a steel bearing plate, the upper surface of the steel bearing plate is fixedly connected with a jack, one end of the jack, which is far away from the steel bearing plate, is fixed on a main beam, displacement meters are symmetrically arranged on the jacks, one end of each displacement meter is fixed on the jack, and the other end of each displacement meter, which is far away from the jack, is fixed on the main beam; the bottom surface of the main beam is provided with a groove sleeved at the upper part of the support column, the top wall in the groove is propped against the upper surface of the support column, the support column is also provided with a reinforcing rib welded and fixed with the support column, and the end surface of the reinforcing rib, which is close to the main beam, is welded and fixed with the bottom surface of the main beam; a balancing weight is arranged on the top surface of the main beam, and a horizontal sensor is mounted on the balancing weight; the jack is electrically connected with the oil pump, the displacement meter is electrically connected with the static load detector, and the level sensor is connected with the input end of a microcomputer provided with data processing software.
Preferably, the supporting column is a steel column.
Preferably, the main beam is a steel beam.
Preferably, the test pile is arranged in a special foundation pit, so that a sufficient erection space is provided for the upper device of the test pile.
Preferably, the diameter of the steel pile cap is the same as the diameter of the test pile.
Preferably, the inner side wall of the steel pile cap abuts against the side wall of the sample pile, and the axis of the steel pile cap coincides with the axis of the steel bearing plate.
Preferably, the displacement meter is a thousand-degree indexing displacement meter and is used for comparing vertical displacement data of the jack and verifying the accuracy of a test result.
Preferably, the reinforcing rib is arranged on the supporting column in a welding mode and is welded and fixed with the bottom of the main beam, so that the contact area of the supporting column and the main beam in the fixing process is increased, the pressure of the main beam on the upper end of the supporting column is dispersed to the reinforcing rib, and the strength of the joint of the supporting column and the main beam is improved.
Preferably, the balancing weights are stacked and carried objects, the balancing weights are distributed on the main beam in a tower-shaped multilayer manner, and each layer of balancing weight is provided with at least one horizontal sensor. The balancing weight is provided with the inclination angle sensor for each layer of balancing weight, so that the monitoring precision is improved, and whether the balancing weight is inclined or not is judged layer by layer, so that the correction of a worker on a load is more accurate and reliable.
Preferably, the balancing weights are concrete precast blocks with the same specification, and the total tonnage of all the balancing weights is larger than that of the test pile but cannot exceed 1.2 times of the tonnage of the test pile.
Preferably, the horizontal sensor is an industrial grade current type inclination angle sensor CQ-A.
Preferably, the oil pump is an ultrahigh pressure hydraulic electric oil pump for providing working pressure for the jack.
The utility model provides a pair of large-tonnage foundation pile static load high accuracy detection device, beneficial effect lies in:
(1) the supporting columns help the main beams to bear part of the reaction force, the steel pile caps protect the test piles, the pile heads of the test piles cannot be crushed, and the steel bearing plates are used for transferring the vertical pressure on the upper portion of the jack, so that the upper load on the test piles is uniform; in addition, the inner side wall of the steel pile cap abuts against the side wall of the sample pile, and the axis of the steel pile cap is superposed with the axis of the steel bearing plate, so that the test pile is prevented from being biased;
(2) the reinforcing ribs are welded on the supporting columns and are welded and fixed with the bottoms of the main beams, which is equivalent to increase the contact area when the supporting columns are fixed with the main beams, so that the pressure of the main beams on the upper ends of the supporting columns is dispersed on the reinforcing ribs, and the strength of the joints of the supporting columns and the main beams is improved;
(3) the displacement meters are symmetrically arranged on two sides of the jack, so that the comparison of vertical displacement data of the jack is monitored, and the accuracy of a test result is verified;
(4) this device installs horizontal sensor on the heap year thing, a horizontal inclination for monitoring the heap year thing, when the heap year thing takes place the slope under external disturbance, will certainly lead to the fact the influence to the distribution of static load, this can disturb detection device's detection precision, and through horizontal sensor's monitoring, the slope takes place for the heap year thing and can be monitored fast, can calculate the volume of pressing in vertical side through inclination promptly, thereby make the staff can accurately master the current vertical ballast condition, and in time adjust the correction.
Drawings
Fig. 1 is the utility model provides a large-tonnage foundation pile static load high accuracy detection device schematic structure.
In the figure: the method comprises the following steps of 1-foundation pit, 2-test pile, 3-support column, 4-steel pile cap, 5-thousand steel bearing plate, 6-jack, 7-displacement meter, 8-main beam, 9-balancing weight, 10-level sensor, 11-oil pump, 12-static load detector, 13-groove and 14-reinforcing rib.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, the high-precision static load detection device for the large-tonnage foundation pile provided by the utility model comprises two support columns 3 arranged in parallel, a test pile 2 is arranged between the two support columns 3, and a girder 8 is horizontally arranged at the top of the two support columns 3; one end of the test pile 2 is located inside a foundation pit 1, one end, far away from the foundation pit 1, of the test pile 2 is provided with a steel pile cap 4, the upper surface of the steel pile cap 4 is fixedly connected with a steel bearing plate 5, the upper surface of the steel bearing plate 5 is fixedly connected with a jack 6, one end, far away from the steel bearing plate 5, of the jack 6 is fixed on a main beam 8, the jack 6 is symmetrically provided with displacement meters 7, one end of each displacement meter 7 is fixed on the jack 6, and one end, far away from the jack 6, of each displacement meter 7 is fixed on the main beam 8; the bottom surface of the main beam 8 is provided with a groove 13 which is sleeved on the upper part of the support column 3, the top wall in the groove 13 is propped against the upper surface of the support column 3, the support column 3 is also provided with a reinforcing rib 14 which is fixedly welded with the support column 3, and the end surface of the reinforcing rib 14, which is close to the main beam 8, is fixedly welded with the bottom surface of the main beam 8; a balancing weight 9 is arranged on the top surface of the main beam 8, and a horizontal sensor 10 is arranged on the balancing weight 9; the jack 6 is electrically connected with the oil pump 11, and the displacement meter 7 is electrically connected with the static load detector 12; the level sensor 10 is connected to the input of a microcomputer provided with data processing software.
Further, the supporting columns 3 are steel columns for helping the main beams 8 to bear a part of the reaction force.
Further, the main beam 8 is a steel beam for bearing the weight of the upper weight 9 and transmitting the upper weight to the jack 6.
Further, the test pile 2 is arranged in the special foundation pit 1, so that a sufficient erection space is provided for the device on the upper portion of the test pile 2.
Further, the diameter of the steel pile cap 4 is the same as the diameter of the test pile 2, so as to protect the test pile 2.
Further, the inner side wall of the steel pile cap 4 abuts against the side wall of the sample pile 2, and the axis of the steel pile cap 4 coincides with the axis of the steel bearing plate 5, so that the test pile 3 is prevented from being biased.
Further, the displacement meter 7 is a micrometer displacement meter and is used for comparing vertical displacement data of the jack 6 and verifying the accuracy of a test result.
Furthermore, the reinforcing rib 14 is arranged on the supporting column 3 by welding and is welded and fixed with the bottom of the main beam 8, which is equivalent to increase the contact area when the supporting column 3 is fixed with the main beam 8, so that the pressure of the main beam 8 on the upper end of the supporting column 3 is dispersed on the reinforcing rib 14, and the strength of the joint of the supporting column 3 and the main beam 8 is improved.
Further, the clump weight 9 is a stacking object, the clump weights 9 are distributed on the main beam 8 in a tower-shaped multilayer manner, and at least one level sensor 10 is arranged on each layer of clump weight 9. The balancing weight 9 is provided with the inclination angle sensor 10 for each layer of balancing weight 8, so that the monitoring precision is improved, whether the balancing weight is inclined or not is judged layer by layer, and the correction of a worker on a load is more accurate and reliable.
Furthermore, the balancing weights 9 are concrete precast blocks with the same specification, and the total tonnage of all the balancing weights 9 is larger than that of the test pile 2, but cannot exceed 1.2 times of that of the test pile 2.
Further, the level sensor 10 is an industrial grade current type inclination angle sensor CQ- A for monitoring the horizontal inclination angle of the heap load.
Further, the oil pump 11 is an ultrahigh pressure hydraulic electric oil pump for providing working pressure for the jack 6.
The working process of the static load high-precision detection device for the large-tonnage foundation pile comprises the following steps:
the first step is as follows: compacting the soil layer in the field in a sufficient width and depth range to ensure that the support columns generate uniform and relatively small deformation, excavating a special foundation pit to provide sufficient erection space for the upper device of the test pile, and cleaning and roughening the pile head of the test pile to a complete horizontal section;
the second step is that: installing a steel pile cap, a steel bearing plate, a jack and the like, fixing the oil pressure jack, ensuring that the limit pressure during maximum loading does not exceed 80 percent of the rated working pressure of the jack and an oil pump, arranging a steel column and steel beam combined bearing platform, piling a concrete precast block, and installing a level sensor on the concrete precast block. The level sensor 10 is connected with the input end of a microcomputer provided with data processing software;
the third step: installing an observation system, installing a full-automatic oil pump, symmetrically installing two displacement meters on two sides of a jack, connecting the two displacement meters to a static load detector, and connecting a flat sensor with an input end of a microcomputer provided with data processing software;
the fourth step: collecting data, starting a test, collecting the data, analyzing the data and giving a test report.
To sum up, a large-tonnage foundation pile static load high accuracy detection device, beneficial effect lies in:
(1) the supporting columns help the main beams to bear part of the reaction force, the steel pile caps protect the test piles, the pile heads of the test piles cannot be crushed, and the steel bearing plates are used for transferring the vertical pressure on the upper portion of the jack, so that the upper load on the test piles is uniform; in addition, the inner side wall of the steel pile cap abuts against the side wall of the sample pile, and the axis of the steel pile cap is superposed with the axis of the steel bearing plate, so that the test pile is prevented from being biased;
(2) the reinforcing ribs are welded on the supporting columns and are welded and fixed with the bottoms of the main beams, which is equivalent to increase the contact area when the supporting columns are fixed with the main beams, so that the pressure of the main beams on the upper ends of the supporting columns is dispersed on the reinforcing ribs, and the strength of the joints of the supporting columns and the main beams is improved;
(3) the displacement meters are symmetrically arranged on two sides of the jack, so that the comparison of vertical displacement data of the jack is monitored, and the accuracy of a test result is verified;
(4) this device installs horizontal sensor on the heap year thing, a horizontal inclination for monitoring the heap year thing, when the heap year thing takes place the slope under external disturbance, will certainly lead to the fact the influence to the distribution of static load, this can disturb detection device's detection precision, and through horizontal sensor's monitoring, the slope takes place for the heap year thing and can be monitored fast, can calculate the volume of pressing in vertical side through inclination promptly, thereby make the staff can accurately master the current vertical ballast condition, and in time adjust the correction.
The foregoing has outlined rather broadly the principles and advantages of the present invention in connection with the description of the drawings. It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (5)
1. A static load high-precision detection device for a large-tonnage foundation pile comprises two support columns (3) which are arranged in parallel, a test pile (2) is arranged between the two support columns (3), and a main beam (8) is fixedly and horizontally arranged at the tops of the two support columns (3); one end of the test pile (2) is located inside a foundation pit (1), one end, far away from the foundation pit (1), of the test pile (2) is provided with a steel pile cap (4), the upper surface of the steel pile cap (4) is fixedly connected with a steel bearing plate (5), the upper surface of the steel bearing plate (5) is fixedly connected with a jack (6), one end, far away from the steel bearing plate (5), of the jack (6) is fixed on a main beam (8), displacement meters (7) are symmetrically arranged on the jack (6), one end of each displacement meter (7) is fixed on the jack (6), and one end, far away from the jack (6), of each displacement meter (7) is fixed on the main beam (8); a groove (13) which is sleeved on the upper part of the supporting column (3) is formed in the bottom surface of the main beam (8), the inner top wall of the groove (13) is abutted against the upper surface of the supporting column (3), a reinforcing rib (14) which is fixedly welded with the supporting column (3) is further arranged on the supporting column (3), and the end surface, close to the main beam (8), of the reinforcing rib (14) is fixedly welded with the bottom surface of the main beam (8); a balancing weight (9) is arranged on the top surface of the main beam (8), and a horizontal sensor (10) is arranged on the balancing weight (9); the jack (6) is electrically connected with the oil pump (11), and the displacement meter (7) is electrically connected with the static load detector (12); the level sensor (10) is connected with the input end of a microcomputer provided with data processing software.
2. The high-precision static load detection device for the large-tonnage foundation pile according to claim 1, characterized in that: one end of each of the two support columns (3) is fixed on the horizontal ground and symmetrically arranged on two sides of the test pile (2).
3. The high-precision static load detection device for the large-tonnage foundation pile according to claim 1, wherein the diameter of the steel pile cap (4) is the same as that of the test pile (2).
4. The high-precision static load detection device for the large-tonnage foundation pile according to claim 1, wherein the displacement meter (7) is a micrometer displacement meter and is symmetrically arranged for comparing the vertical displacement of the jack.
5. The high-precision static load detection device for the large-tonnage foundation pile according to claim 1, wherein the counter weight blocks (9) are stacked objects, a plurality of counter weight blocks are distributed on the main beam (8) in a tower-shaped multilayer manner, and each layer of counter weight block is provided with at least one level sensor (10).
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| CN201921908161.5U CN210917508U (en) | 2019-11-07 | 2019-11-07 | Large-tonnage foundation pile static load high-precision detection device |
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| CN201921908161.5U CN210917508U (en) | 2019-11-07 | 2019-11-07 | Large-tonnage foundation pile static load high-precision detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482452A (en) * | 2020-12-07 | 2021-03-12 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN113216281A (en) * | 2021-04-22 | 2021-08-06 | 浙大城市学院 | Construction method of super-tonnage foundation pile anchor-pressing static load test system |
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2019
- 2019-11-07 CN CN201921908161.5U patent/CN210917508U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482452A (en) * | 2020-12-07 | 2021-03-12 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN112482452B (en) * | 2020-12-07 | 2022-02-18 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN113216281A (en) * | 2021-04-22 | 2021-08-06 | 浙大城市学院 | Construction method of super-tonnage foundation pile anchor-pressing static load test system |
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