CN111287224A - Utilize vertical static load test device of lever principle - Google Patents
Utilize vertical static load test device of lever principle Download PDFInfo
- Publication number
- CN111287224A CN111287224A CN202010097880.4A CN202010097880A CN111287224A CN 111287224 A CN111287224 A CN 111287224A CN 202010097880 A CN202010097880 A CN 202010097880A CN 111287224 A CN111287224 A CN 111287224A
- Authority
- CN
- China
- Prior art keywords
- loading
- load test
- lever principle
- static load
- test device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a vertical static load test device utilizing a lever principle, which comprises a model box and a loading device, wherein compared with a servo motor as loading power, the device greatly saves purchase cost and maintenance cost; compared with a servo motor, the constant-load loading can be really realized, and more accurate test data can be obtained in a high-precision experiment; the principle is simple, the operation is simple, and the labor is saved; the test paper can be repeatedly used for constant load test; the addition of the guide device avoids eccentric loading which is easy to occur in the traditional loading, and the reliability of the test is ensured.
Description
Technical Field
The invention belongs to the technical field of ocean engineering, and particularly relates to a vertical static load test device utilizing a lever principle.
Background
With the continuous promotion of ocean strategy in China, ocean engineering is in the way. The offshore platform needs to be built by offshore pile foundations for bearing and supporting, and at present, research on offshore pile foundations in China is actively carried out. The method is limited by scale fields and capital, and the model experiment of the offshore pile foundation adopts a small scale experiment to carry out simulation loading. The vertical static load experiment of the pile foundation is a common and very important experiment and is used for researching a load-displacement curve, a stress-strain curve and the like of the pile foundation. During a vertical static pressure pile loading experiment, a servo motor is mostly selected as a power source to carry out the experiment. When the servo motor is used as a power loading device to carry out experiments, the following problems exist: 1) the high-precision servo motor loading device has the disadvantages of high cost, difficult maintenance and inconvenient use; 2) because the motor signal is unstable, the force fluctuation is easy to occur when the servo motor is loaded in a constant load way, and the aim of the constant load test is difficult to achieve; 3) a guide device is not arranged during the loading of the servo motor, so that the eccentric loading is easily caused. To solve the problems, the vertical static load test device utilizing the lever principle is provided, and the purpose of vertically and stably loading a pile foundation can be achieved on the premise of controlling cost and saving scientific research expenses.
Disclosure of Invention
The invention aims to provide a vertical static load test device utilizing the lever principle, which provides more stable fixed load for a pile foundation model test. Compared with the servo motor which is generally adopted at present, the servo motor has the advantages of low cost and stable force application, and can obtain more accurate test effect and test data with lower test cost.
The invention is realized by the following technical scheme:
a vertical static load test device utilizing the lever principle comprises a model box and a loading device;
the upper part of the model box is provided with an opening, and the edge of the upper end of the model box is provided with a guide rail;
the loading device comprises a sliding support piece, a cross beam, a guide cylinder, a pin shaft fixing seat, a pin shaft, a loading arm, a sliding sleeve, a bull eye wheel and a force transmission column;
the sliding support pieces are fixedly arranged at two ends of the cross beam, and the sliding support pieces are placed on two opposite guide rails of the model box and can slide along the guide rails so as to adjust the position of the cross beam; the utility model discloses a portable building loading arm, including crossbeam, loading arm, guide cylinder, bull's eye wheel, power transmission post, guide cylinder, loading arm, lower extreme, the crossbeam middle part is the fretwork, and the both sides of fretwork are formed with the slide, it can follow the slide gliding to install a plurality of quantity on the slide the guide cylinder, at one of them install the round pin axle on the sliding support piece, loading arm's one end with the round pin axle is articulated, loading arm is last to be provided with and to follow its gliding sliding sleeve, bull's eye wheel is connected to the sliding sleeve lower extreme.
In the technical scheme, the model box is formed by combining four baffles on the periphery and a bottom plate at the bottom, and the guide rail is arranged at the upper edges of the four baffles.
In the technical scheme, the four baffles of the model box are square, the side length of each baffle is 1-1.5m, and the thickness of each baffle is 10-20 mm.
In the technical scheme, reinforcing ribs are arranged on the outer sides of the four baffles of the model box.
In the technical scheme, the length of the loading arm is 1.8-2.2 m.
In the above technical scheme, one of the sliding support members is provided with 2 pin shaft fixing seats, and the pin shaft is installed between the 2 pin shaft fixing seats.
In the above technical scheme, the loading device further comprises a weight, and the weight is fixed at the free end of the loading arm through a hook.
The invention has the advantages and beneficial effects that:
1) the economic efficiency is as follows: compared with a servo motor as loading power, the loading device greatly saves purchase cost and maintenance cost;
2) stability: compared with a servo motor, the constant-load loading can be really realized, and more accurate test data can be obtained in a high-precision experiment;
3) convenience: the scheme has the advantages of simple test principle, simple operation and labor saving;
4) repeatability: the scheme can be repeatedly used for constant load loading tests;
5) precision: the addition of the guide device avoids eccentric loading which is easy to occur in the traditional loading, and the reliability of the test is ensured.
Drawings
Fig. 1 is a schematic view of the overall model structure of the device.
Fig. 2 is a schematic view of the front vertical surface structure of the device.
Fig. 3 is a schematic side elevation view of the device.
Fig. 4 is a schematic top view of the apparatus.
Fig. 5 is a schematic structural diagram of a loading device of the device.
Wherein: 1 is a model box; 2 is a reinforcing rib; 3 is a sliding support; 4 is a guide rail; 5 is a loading arm; 6 is a sliding sleeve; 7 is a cross beam; 8 is a pin shaft; 9 is a force transmission column; 10 is a bull's eye wheel; and 11, a guide cylinder.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Examples
A vertical static load test device utilizing the lever principle comprises a model box 1 and a loading device;
the upper part of the model box is provided with an opening, four steel plates with the block size of 1510mm by 10mm are spliced into model grooves with the length, the width and the height of each model groove being 1.5m, and the size of the model box can be adjusted by specific tests. In order to prevent the lateral buckling of the mold box, 4 transverse reinforcing bars 2 are added in the height direction. The upper edge of the model box is provided with a transverse L-shaped guide rail for adjusting the loading device along with the pile position.
The loading device comprises a sliding support piece 3, a cross beam 7, a guide cylinder 11, a pin shaft fixing seat, a pin shaft 8, a loading arm 5, a sliding sleeve 6, a bull eye wheel 10 and a force transmission column 9;
the loading arm is made of 2000mm long square steel tubing, the length of which can be specifically sized for a particular trial. One end of the loading arm is additionally provided with a hanging weight, the other end of the loading arm is fixed on the sliding support piece through a pin shaft, and the loading arm is provided with a sliding sleeve which can slide along the loading arm so as to adjust the position of a loading point along with the change of the pile position. In order to ensure vertical application of the load, a bull's eye wheel was chosen as the loading contact point. The bull's eye wheel is connected and arranged on the loading arm through a sliding sleeve, and the position of the bull's eye wheel can be adjusted along with the change of the pile position;
the crossbeam erects on two sliding support spare of guide rail, mainly plays the effect of supporting the guide cylinder, is made by No. 10 channel-section steels, and length is 1510 m. The guide cylinder is a cylindrical steel sleeve, the inner diameter is 30mm, the outer diameter is 35mm, the length is 100mm, and the inside is fully lubricated. The force transmission column is made of cylindrical steel with the diameter of 28mm and the length of 150mm and is nested in the guide cylinder. The guide cylinder is vertically connected to the cross beam according to the pile position, and the force transmission column is nested in the guide cylinder. The upper part of the transmission upright post is connected with the loading point of the bull-eye wheel, and the lower part of the transmission upright post is connected with the pile, so that the transmission function is achieved, and the purpose of vertical constant-load loading is achieved.
The positioning structure is used for accurately acting the loading point on the pile foundation model and mainly comprises transverse positioning and longitudinal positioning. The transverse positioning drives the loading device to be positioned together through the sliding support piece and the sliding block of the cross beam on the guide rail, and then the sliding support piece is fixed by using a bolt. The longitudinal positioning drives the bull's eye wheel through the sliding sleeve and the sliding guide cylinder on the beam is aligned with the bull's eye wheel, so that three points of a bull's eye wheel center point, a transmission upright post center and a pile foundation model center are aligned, and then the bull's eye wheel is fixed by a vertical bolt, thereby achieving the purpose of accurate positioning.
During the experiment, firstly, packing the model to 1300mm with standard sand, determining the pile position, and driving the model pile into the soil; adjusting the position of the sliding support piece on the guide rail to enable the transverse positioning to be accurately positioned to the central line of the pile, and then fastening the bolt for positioning; adjusting the longitudinal positioning device to align the center of the guide cylinder with the loading point of the bull eye wheel and the center of the pile, and then fastening the bolt for positioning; determining the mass of the weight to be added through a calculation formula, and preparing the weight; lifting the loading arm, putting the force transfer column into the guide cylinder, and dripping a few drops of lubricating oil for sufficient lubrication; the loading arm is put down, so that the loading point of the bull-eye wheel is placed at the center of the transmission upright post; adding hanging weights and starting the test; after loading is completed, the weight is taken off, the force transmission column is taken out, the positioning device is adjusted to the next pile position, and the experiment is repeated.
The loading device mainly utilizes the physical principle of a lever principle, and the conversion principle is as follows:
Lweight (weight)×FWeight (weight)＝lPile and its making method×LPile and its making method
Wherein L isWeight (weight)Representing the horizontal distance between the weight loading point and the center of the loading bearing;
Fweight (weight)Representing the mass of the added weight;
Lpile and its making methodRepresenting the horizontal distance between the center of the pile position and the center of the loading bearing;
Fpile and its making methodIndicating the intended constant load of the pile foundation.
Compared with a servo motor as loading power, the device greatly saves purchase cost and maintenance cost; compared with a servo motor, the constant-load loading can be really realized, and more accurate test data can be obtained in a high-precision experiment; the principle is simple, the operation is simple, and the labor is saved; the test paper can be repeatedly used for constant load test; the addition of the guide device avoids eccentric loading which is easy to occur in the traditional loading, and the reliability of the test is ensured.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (7)
1. The utility model provides an utilize vertical static load test device of lever principle which characterized in that: comprises a model box and a loading device;
the upper part of the model box is provided with an opening, and the edge of the upper end of the model box is provided with a guide rail;
the loading device comprises a sliding support piece, a cross beam, a guide cylinder, a pin shaft fixing seat, a pin shaft, a loading arm, a sliding sleeve, a bull eye wheel and a force transmission column;
the sliding support pieces are fixedly arranged at two ends of the cross beam, and the sliding support pieces are placed on two opposite guide rails of the model box and can slide along the guide rails so as to adjust the position of the cross beam; the utility model discloses a portable building loading arm, including crossbeam, loading arm, guide cylinder, bull's eye wheel, power transmission post, guide cylinder, loading arm, lower extreme, the crossbeam middle part is the fretwork, and the both sides of fretwork are formed with the slide, it can follow the slide gliding to install a plurality of quantity on the slide the guide cylinder, at one of them install the round pin axle on the sliding support piece, loading arm's one end with the round pin axle is articulated, loading arm is last to be provided with and to follow its gliding sliding sleeve, bull's eye wheel is connected to the sliding sleeve lower extreme.
2. The vertical static load test device using the lever principle according to claim 1, wherein: the model box is formed by combining four baffles on the periphery and a bottom plate at the bottom, and the guide rail is arranged at the upper edges of the four baffles.
3. The vertical static load test device using the lever principle according to claim 2, wherein: the four baffles of the model box are square, the side length of the four baffles is 1-1.5m, and the thickness of the four baffles is 10-20 mm.
4. The vertical static load test device using the lever principle according to claim 2, wherein: reinforcing ribs are arranged on the outer sides of the four baffles of the model box.
5. The vertical static load test device using the lever principle according to claim 1, wherein: the length of the loading arm is 1.8-2.2 m.
6. The vertical static load test device using the lever principle according to claim 1, wherein: one of the sliding support pieces is provided with 2 pin shaft fixing seats, and the pin shaft is arranged between the 2 pin shaft fixing seats.
7. The vertical static load test device using the lever principle according to claim 1, wherein: the loading device further comprises a weight, and the weight is fixed to the free end of the loading arm through a hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097880.4A CN111287224A (en) | 2020-02-18 | 2020-02-18 | Utilize vertical static load test device of lever principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097880.4A CN111287224A (en) | 2020-02-18 | 2020-02-18 | Utilize vertical static load test device of lever principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287224A true CN111287224A (en) | 2020-06-16 |
Family
ID=71027484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010097880.4A Pending CN111287224A (en) | 2020-02-18 | 2020-02-18 | Utilize vertical static load test device of lever principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111287224A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816294A (en) * | 2021-03-02 | 2021-05-18 | 郑州大学 | Slope simulation test device and test method |
-
2020
- 2020-02-18 CN CN202010097880.4A patent/CN111287224A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816294A (en) * | 2021-03-02 | 2021-05-18 | 郑州大学 | Slope simulation test device and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201145611Y (en) | Large-scale weighing equipment calibrating apparatus without counterweight | |
| CN203224285U (en) | A weighing device | |
| CN111287224A (en) | Utilize vertical static load test device of lever principle | |
| CN112098022A (en) | Device for static and dynamic load test of bridge model, control method and application | |
| CN212612666U (en) | Utilize vertical static load test device of lever principle | |
| CN203684101U (en) | Device for enabling simply supported beam to move transversally and take place | |
| CN219772738U (en) | Pushing and sliding equipment for steel box girder | |
| CN201917459U (en) | Fuel oil tank assembly test device | |
| CN209161394U (en) | A kind of lifting mechanism for vehicle equipment | |
| CN1436705A (en) | Integral translating method and apparatus for very high and very heavy body | |
| CN112756965B (en) | Split mounting method for tilting speed reducer of converter | |
| CN2444285Y (en) | Continuous multi-cross-bridge model for experiment and teaching | |
| CN201309817Y (en) | Hydraulic lifting mounting carrier vehicle | |
| CN110629813B (en) | Lever type model pile test loading system | |
| CN204435443U (en) | Detachable pile tube beam test device | |
| CN204019070U (en) | Derrick assembling combination steelframe | |
| CN206561385U (en) | A kind of gradient coil mounting tool | |
| CN106695681A (en) | Gradient coil mounting tool | |
| CN112832539A (en) | Subway station prefabricated station platen installation device | |
| CN201485791U (en) | Bridge erection machine with guide beam | |
| CN111879285A (en) | Mobile formwork pre-pressing falling rule settlement observation and elevation adjustment method | |
| CN219567346U (en) | Rated load measuring system for bridge type hoisting machinery | |
| CN2391180Y (en) | Removable electronic vehicle weighing apparatus | |
| CN218145568U (en) | Pipe fitting installation lifting devices | |
| CN203383515U (en) | Displacer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |