CN112796353A - Device for anti-slide pile test - Google Patents
Device for anti-slide pile test Download PDFInfo
- Publication number
- CN112796353A CN112796353A CN202110124487.4A CN202110124487A CN112796353A CN 112796353 A CN112796353 A CN 112796353A CN 202110124487 A CN202110124487 A CN 202110124487A CN 112796353 A CN112796353 A CN 112796353A
- Authority
- CN
- China
- Prior art keywords
- outer side
- side plate
- plate
- hole
- pile
- 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)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a device for an anti-slide pile test, which is characterized in that: the device comprises a supporting frame and an elastic module; the braced frame is used for supporting the friction pile and provides the reference basis for the spring deformation volume of elasticity module, and the elasticity module is range upon range of by a plurality of bullet nature modules and forms, and every bullet nature module includes 4 elastic component, and 4 elastic component set up around the friction pile, simulate the bed rock with the actual contact of the anchor section of friction pile, when the friction pile takes place the displacement in the process of the test, the elasticity module simulates the foundation counter-force that the bed rock produced the friction pile through warping. When the device provided by the invention is applied to the anti-slide pile test, the data obtained by the test is more comprehensive and accurate, and the authenticity and reliability of the actual stress research result of the anti-slide pile are greatly improved.
Description
Technical Field
The invention relates to the technical field of slope support, in particular to a device for an anti-slide pile test.
Background
Among the prior art, the fixed rigid support that all adopts of friction pile anchor section of friction pile test device, the support can not produce and warp or the displacement, and such device though can simulate and detect the deformation condition of friction pile free section under the landslide thrust effect to a certain extent, but neglected the foundation counter-force of the bed rock of inlaying of actual and friction pile anchor section contact to the influence of friction pile, in fact, the bed rock nature with the friction pile contact is different in the engineering of difference: some are hard rocks with high strength, large rigidity and small deformation, so that the displacement of the anchoring section of the slide-resistant pile is small; some soft rocks have low strength, small rigidity and large deformation, so that the displacement of the anchoring section of the slide-resistant pile is large, different foundation reaction forces are determined by different bedrock properties, and the foundation reaction forces play an important role in researching the stress deformation rule of the slide-resistant pile. If the action of the counterforce of the bed rock foundation is not considered in the anti-slide pile test, the stress condition of the anti-slide pile in the test and the stress condition in the actual use have larger deviation, so that the obtained test data is inaccurate and incomplete, and even misjudgment can be caused on the design and the use of the anti-slide pile.
Disclosure of Invention
Aiming at the problems of the background art, the invention provides a device for an anti-slide pile test, which aims to solve the problems that the anti-slide pile test device in the prior art has larger deviation of test data and actual data, and the test data is inaccurate and incomplete because the foundation reaction effect is not considered.
In order to achieve the purpose of the invention, the invention provides a device for testing a slide-resistant pile, wherein the cross section of the slide-resistant pile is rectangular, and the innovation points are as follows: the device comprises a supporting frame and an elastic module; the supporting frame comprises a bottom plate and 4 vertical plates, the bottom plate is rectangular and comprises 4 rectangular edges, the 4 vertical plates are respectively fixedly arranged on the 4 rectangular edges on the upper side surface of the bottom plate, a single vertical plate is parallel to the corresponding rectangular edge, the 4 vertical plates are all perpendicular to the bottom plate, bolt holes for fixing the supporting frame are formed in the bottom plate, a plurality of first through holes are formed in the middle of each vertical plate, and the first through holes in the single vertical plate are uniformly distributed in the direction perpendicular to the bottom plate;
the elastic module is arranged in the supporting frame and consists of a plurality of bullet modules which are stacked along the direction vertical to the bottom plate; the single sub-elastic module consists of 4 elastic components, and the 4 elastic components are respectively connected with the 4 vertical plates;
the single elastic component comprises an inner side plate, an outer side plate, a connecting pipe, a central rod, 2 supporting rods, 3 springs and 2 nuts; the inner side plate and the outer side plate are both rectangular, and the axial direction of the inner side plate and the axial direction of the outer side plate are both parallel to the bottom plate; the outer side surface of the outer side plate is provided with 2 second through holes and 1 third through hole, the 2 second through holes are distributed along the axial direction of the outer side plate, the third through holes are arranged among the 2 second through holes, the aperture of each second through hole is matched with the diameter of the support rod, and the aperture of each third through hole is matched with the diameter of the central rod; one end of the connecting pipe is fixedly connected with the inner side face of the vertical plate, the other end of the connecting pipe is fixedly connected with the outer side face of the outer side plate, the outer side plate is parallel to the connected vertical plate, and the inner side plate is parallel to the outer side plate; the hole of the connecting pipe is opposite to the first through hole at the corresponding height of the vertical plate, and the hole of the connecting pipe is also opposite to the third through hole; one end of the central rod is fixedly connected with the outer side face of the inner side plate, and the other end of the central rod sequentially penetrates through the third through hole, the hole of the connecting pipe and the first through hole and is exposed out of the outer side face of the vertical plate; the 2 support rods are respectively sleeved in the 2 second through holes, one end of each support rod is fixedly connected with the outer side face of the inner side plate, the other end of each support rod penetrates out of the outer side face of the outer side plate, external threads are arranged on the outer peripheral face of the rod section of each support rod exposed out of the outer side face of the outer side plate, and the external threads are matched with the internal threads of the nut; the 2 nuts are respectively sleeved on the external thread sections of the 2 support rods; the 3 springs are respectively sleeved on the central rod and the 2 support rods, one end of each spring is in contact with the outer side face of the inner side plate, the other end of each spring is in contact with the inner side face of the outer side plate, and each spring is in a compressed state;
the inner side plates of 4 elastic components governed by a single bullet-shaped module form a rectangular frame in a surrounding mode, and the size of the rectangle formed by the rectangular frame is matched with the size of the cross section of the anti-slide pile.
Furthermore, the outer peripheral surface of the rod section near the free end of the central rod is provided with scales, and the scales are arranged along the axial direction of the central rod.
The principle of the invention is as follows:
the device is used for restraining the anchoring section of the slide pile in the slide pile test, and in order to simulate the bed rock foundation reaction force borne by the slide pile in the actual use process, the inventor creatively adopts the elastic module to simulate the bed rocks with different rigidities, provides support reaction force through the supporting frame and provides a reference datum for obtaining the spring deformation, and then obtains foundation parameters such as the foundation reaction force through calculation for the stress research of the slide pile.
Particularly, the supporting frame provides a fixed foundation for the whole device, particularly, the vertical plates on the periphery of the supporting frame provide support reaction for a test, and the outer side surfaces of the vertical plates provide reference for deformation measurement of the elastic modules; the core part of the device is the elastic module, the elastic component is the smallest constituent unit, when a load in a certain direction is applied to the free section of the anti-slide pile in the test, the anti-slide pile tilts and displaces towards the corresponding direction, meanwhile, the anti-slide pile pushes the inner side plate of the elastic component on the corresponding side to compress and deform the spring, the compression deformation of the spring can be obtained through the displacement of the central rod relative to the outer side surface of the opposite plate, the elastic force generated by the elastic component due to compression deformation can be calculated by combining the number of the springs of the elastic component and the elastic coefficient of the spring, and the elastic force is the foundation counterforce of the foundation rock on the depth simulated by the elastic component. 4 elastic components on the same depth are arranged in four directions to form a bullet-shaped module, and for the bullet-shaped module, the nuts of all the elastic components can be adjusted to enable the springs to generate certain pre-pressure to simulate the pressure of bedrock contacting with the anchoring section of the slide-resistant pile on the slide-resistant pile in all directions in actual use according to actual conditions. And a plurality of bullet nature modules are carried out range upon range of arrangement in the vertical direction, and its aim at measures through the displacement volume to the elastic component's of the different degree of depth well core rod, can acquire the ground reaction and the relevant data of friction pile on each different degree of depth to acquire more comprehensive, more accurate test data. In order to more conveniently measure the displacement of the central rod, as optimization, scales are arranged on the free end rod section of the central rod, and the deformation of the spring can be directly and conveniently read.
In fact, parameters such as the number of springs and the elastic coefficient of the springs of the device can be adjusted according to the parameters of the bedrock where the slide-resistant pile is actually located, for example, the maximum foundation reaction force and the foundation coefficient required by the test can be obtained according to the maximum foundation reaction force and the foundation coefficient possible by the bedrock where the slide-resistant pile is actually located and combining with a similar theory, and then the elastic coefficient and the number of the springs required by the test are calculated, so that the device is closer to the properties such as the rigidity of the actual bedrock, and the obtained test data are more accurate. The above calculation methods and theories are available to those skilled in the art in the literature or manuals of the prior art.
Therefore, the invention has the following beneficial effects: the device is adopted to carry out the stress test of the slide-resistant pile, and the stress influence of the deformation of the foundation rock of the anchoring section of the slide-resistant pile on the slide-resistant pile can be simulated, so that the actual data such as the foundation reaction force and the like can be acquired, the data acquired by the test is more comprehensive and accurate, and the authenticity and the reliability of the actual stress research result of the slide-resistant pile are greatly improved.
Drawings
The drawings of the present invention are described below.
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the present invention used in the experiment.
In the figure: 1. a base plate; 2. a vertical plate; 3. an inner side plate; 4. an outer panel; 5. a connecting pipe; 6. a center pole; 7. a support bar; 8. a spring; 9. a nut; 10. anti-slide piles; 11. a jack.
Detailed Description
The present invention will be further described with reference to the following examples.
The device for testing the slide-resistant pile 10 as shown in the attached figures 1 and 2, wherein the cross section of the slide-resistant pile 10 is rectangular, and the device comprises a supporting frame and an elastic module; the supporting frame comprises a bottom plate 1 and 4 vertical plates 2, the bottom plate 1 is rectangular, the bottom plate 1 comprises 4 rectangular edges, the 4 vertical plates 2 are respectively and fixedly arranged on the 4 rectangular edges on the upper side surface of the bottom plate 1, a single vertical plate 2 is parallel to the corresponding rectangular edge, the 4 vertical plates 2 are all perpendicular to the bottom plate 1, bolt holes used for fixing the supporting frame to a test platform are formed in the bottom plate 1, a plurality of first through holes are formed in the middle of the vertical plate 2, and the first through holes in the single vertical plate 2 are uniformly distributed in the direction perpendicular to the bottom plate;
the elastic module is arranged in the supporting frame and consists of a plurality of bullet modules which are stacked along the direction vertical to the bottom plate; the single sub-elastic module consists of 4 elastic components, and the 4 elastic components are respectively connected with the 4 vertical plates 2;
the single elastic component comprises an inner side plate 3, an outer side plate 4, a connecting pipe 5, a central rod 6, 2 supporting rods 7, 3 springs 8 and 2 nuts 9; the inner side plate 3 and the outer side plate 4 are both rectangular, and the axial direction of the inner side plate 3 and the axial direction of the outer side plate 4 are both parallel to the bottom plate 1; the outer side surface of the outer side plate 4 is provided with 2 second through holes and 1 third through hole, the 2 second through holes are distributed along the axial direction of the outer side plate 4, the third through holes are arranged among the 2 second through holes, the aperture of each second through hole is matched with the diameter of the support rod 7, and the aperture of each third through hole is matched with the diameter of the central rod 6; one end of the connecting pipe 5 is fixedly connected with the inner side surface of the vertical plate 2, the other end of the connecting pipe 5 is fixedly connected with the outer side surface of the outer side plate 4, the outer side plate 4 is parallel to the connected vertical plate 2, and the inner side plate 3 is parallel to the outer side plate 4; the hole of the connecting pipe 5 is opposite to the first through hole at the corresponding height of the vertical plate 2, and the hole of the connecting pipe 5 is also opposite to the third through hole; one end of the central rod 6 is fixedly connected with the outer side surface of the inner side plate 3, and the other end of the central rod 6 sequentially penetrates through the third through hole, the hole of the connecting pipe and the first through hole and is exposed out of the outer side surface of the vertical plate 2; scales are arranged on the outer peripheral surface of the rod section near the free end of the central rod 6 and are arranged along the axial direction of the central rod 6; the 2 support rods 7 are respectively sleeved in the 2 second through holes, one end of each support rod 7 is fixedly connected with the outer side surface of the inner side plate 3, the other end of each support rod 7 penetrates out of the outer side surface of the outer side plate 4, external threads are arranged on the outer peripheral surface of the rod section of each support rod 7 exposed out of the outer side surface of the outer side plate 4, and the external threads are matched with the internal threads of the nut 9; 2 nuts 9 are respectively sleeved on the external thread sections of the 2 support rods 7; the 3 springs 8 are respectively sleeved on the central rod 6 and the 2 support rods 7, one end of each spring 8 is in contact with the outer side face of the inner side plate 3, the other end of each spring 8 is in contact with the inner side face of the outer side plate 4, and each spring 8 is in a compressed state;
the inner side plates 3 of 4 elastic components governed by a single bullet-shaped module form a rectangular frame, and the size of the rectangle formed by the rectangular frame is matched with the size of the cross section of the slide-resistant pile 10.
As shown in fig. 3, before the anti-slide pile test, the anchoring section of the anti-slide pile 10 is first placed into the central space of the device, the bottom surface of the anti-slide pile 10 is contacted with the bottom plate 1, then the nut 9 of each sub-elastic assembly is adjusted, the inner side plate 3 of each sub-elastic assembly is contacted with the side surface of the anti-slide pile 10, a certain pre-pressure can be applied to the side surface of the anti-slide pile by adjusting the nut 9 and compressing the spring 8 according to the test requirement, and the pre-compression amount of each elastic assembly spring 9 is recorded.During the test, a certain side of the slide-resistant pile 10 is loaded in a grading way through the jack 11 arranged at one side of the slide-resistant pile 10, the slide-resistant pile 10 is enabled to deflect and displace to extrude the inner side plates 3 of all the elastic components at the opposite side, one-stage load is applied each time, namely, the displacement of the central rod 6 of each elastic component relative to the outer side surface of the vertical plate 2 is recorded, the compression amount of the spring 9 under the current-stage load is obtained, and then the foundation counter force P generated by a certain elastic component under the current load can be calculated through the following formula according to the obtained compression amount of the springm. The formula is: pm＝NK(xm0+xmn) In which P ismThe foundation counter force generated by the elastic component of the sub-elastic module of the mth layer is represented, and the maximum value of m is the number of the sub-elastic modules, namely the maximum layer number of the elastic modules; n is the number of springs of a single elastic component, and in this embodiment, N is 3; k is the elastic coefficient of a single spring; x is the number ofm0The precompression of the spring of the mth layer elastic component; x is the number ofmnThe compression amount of the spring of the elastic component of the mth layer under the nth-stage load is shown, wherein the maximum value of n is the maximum stage of the applied load.
Claims (2)
1. The utility model provides a device for friction pile is experimental, the cross section of friction pile is the rectangle, its characterized in that: the device comprises a supporting frame and an elastic module; the supporting frame comprises a bottom plate (1) and 4 vertical plates (2), the bottom plate (1) is rectangular, the bottom plate (1) comprises 4 rectangular edges, the 4 vertical plates (2) are respectively and fixedly arranged on the 4 rectangular edges on the upper side surface of the bottom plate (1), a single vertical plate (2) is parallel to the corresponding rectangular edge, the 4 vertical plates (2) are all perpendicular to the bottom plate (1), bolt holes for fixing the supporting frame are formed in the bottom plate (1), a plurality of first through holes are formed in the middle of each vertical plate (2), and the first through holes in the single vertical plate (2) are uniformly distributed in the direction perpendicular to the bottom plate;
the elastic module is arranged in the supporting frame and consists of a plurality of bullet modules which are stacked along the direction vertical to the bottom plate; the single sub-elastic module consists of 4 elastic components, and the 4 elastic components are respectively connected with the 4 vertical plates (2);
the single elastic component comprises an inner side plate (3), an outer side plate (4), a connecting pipe (5), a central rod (6), 2 supporting rods (7), 3 springs (8) and 2 nuts (9); the inner side plate (3) and the outer side plate (4) are both rectangular, and the axial direction of the inner side plate (3) and the axial direction of the outer side plate (4) are both parallel to the bottom plate (1); 2 second through holes and 1 third through hole are formed in the outer side face of the outer side plate (4), the 2 second through holes are distributed along the axial direction of the outer side plate (4), the third through holes are formed among the 2 second through holes, the aperture of each second through hole is matched with the diameter of the support rod (7), and the aperture of each third through hole is matched with the diameter of the central rod (6); one end of the connecting pipe (5) is fixedly connected with the inner side surface of the vertical plate (2), the other end of the connecting pipe (5) is fixedly connected with the outer side surface of the outer side plate (4), the outer side plate (4) is parallel to the connected vertical plate (2), and the inner side plate (3) is parallel to the outer side plate (4); the hole of the connecting pipe (5) is opposite to the first through hole at the corresponding height of the vertical plate (2), and the hole of the connecting pipe (5) is also opposite to the third through hole; one end of the central rod (6) is fixedly connected with the outer side face of the inner side plate (3), and the other end of the central rod (6) sequentially penetrates through the third through hole, the hole of the connecting pipe and the first through hole and is exposed out of the outer side face of the vertical plate (2); the 2 support rods (7) are respectively sleeved in the 2 second through holes, one end of each support rod (7) is fixedly connected with the outer side face of the inner side plate (3), the other end of each support rod (7) penetrates out of the outer side face of the outer side plate (4), external threads are arranged on the outer peripheral face of the rod section of each support rod (7) exposed out of the outer side face of the outer side plate (4), and the external threads are matched with the internal threads of the nut (9); the 2 nuts (9) are respectively sleeved on the external thread sections of the 2 support rods (7); the 3 springs (8) are respectively sleeved on the central rod (6) and the 2 support rods (7), one end of each spring (8) is in contact with the outer side face of the inner side plate (3), the other end of each spring (8) is in contact with the inner side face of the outer side plate (4), and each spring (8) is in a compressed state;
the inner side plates (3) of 4 elastic components governed by a single bullet-shaped module form a rectangular frame, and the size of the rectangle formed by the rectangular frame is matched with the size of the cross section of the slide-resistant pile.
2. The apparatus for slide pile testing of claim 1, wherein: the outer peripheral surface of the rod section near the free end of the central rod (6) is provided with scales, and the scales are arranged along the axial direction of the central rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124487.4A CN112796353A (en) | 2021-01-29 | 2021-01-29 | Device for anti-slide pile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124487.4A CN112796353A (en) | 2021-01-29 | 2021-01-29 | Device for anti-slide pile test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112796353A true CN112796353A (en) | 2021-05-14 |
Family
ID=75812745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110124487.4A Pending CN112796353A (en) | 2021-01-29 | 2021-01-29 | Device for anti-slide pile test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112796353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217125A (en) * | 2022-07-12 | 2022-10-21 | 四川省公路规划勘察设计研究院有限公司 | Multilayer slide belt accumulation layer landslide anti-skidding supporting construction |
-
2021
- 2021-01-29 CN CN202110124487.4A patent/CN112796353A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217125A (en) * | 2022-07-12 | 2022-10-21 | 四川省公路规划勘察设计研究院有限公司 | Multilayer slide belt accumulation layer landslide anti-skidding supporting construction |
| CN115217125B (en) * | 2022-07-12 | 2023-09-26 | 四川省公路规划勘察设计研究院有限公司 | Multi-layer sliding belt stacking layer landslide anti-sliding support structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102607754B (en) | Device for measuring negative skin friction of pile soil | |
| CN102323150B (en) | Simulated test unit and method for slope stability with faulting | |
| CN110780056A (en) | Test device for simulating movable fault to research on tunnel damage mechanism and using method | |
| CN202610847U (en) | Measuring device of pile soil negative friction | |
| Crewe et al. | Development of a large flexible shear stack for testing dry sand and simple direct foundations on a shaking table | |
| CN110715798B (en) | Test device and test method for measuring self-loosening of bolt | |
| CN106989995A (en) | A kind of adjustable Rock And Soil of lateral spacing condition vertically compresses ancillary test device | |
| CN112796353A (en) | Device for anti-slide pile test | |
| CN110967264A (en) | Dynamic-static coupling loading test system based on lever principle | |
| CN214329015U (en) | Device for anti-slide pile test | |
| CN107942038B (en) | Side slope support model test system and test method | |
| CN112227432B (en) | Bearing capacity test device and test method for pile foundation in soft soil during vibration subsidence | |
| CN211603171U (en) | Test device for simulating movable fault to research on tunnel damage mechanism | |
| Rahil et al. | Effect of relative density on behavior of single pile and piles groups embedded with different lengths in sand | |
| CN110967265A (en) | Coupled dynamic-static loading test system | |
| CN114397199B (en) | Pile torsion resistance testing method | |
| CN214952575U (en) | Rigid-flexible rock pressure testing machine device for teaching demonstration | |
| CN215296993U (en) | Multi-connected rock-soil in-situ shear testing device for full-stress path tracking | |
| CN208398853U (en) | The experimental rig of scar irregularity degree is simulated in anchor pole test | |
| CN210893964U (en) | Shear apparatus loading device | |
| CN207730416U (en) | Rock texture pseudo static testing device when a kind of simulation earthquake | |
| CN112233530A (en) | Single-column suspension device for foundation pile self-balancing static load test mechanism demonstration | |
| CN105157900A (en) | Measurement apparatus of prestress of membrane material | |
| CN212153483U (en) | Foundation pile static load test equipment | |
| CN205954722U (en) | Spiral ground stake counterforce device |
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 |