CN111926868A - Simulation immersed tube stake end defect processing's work progress presentation device - Google Patents
Simulation immersed tube stake end defect processing's work progress presentation device Download PDFInfo
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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Abstract
The application provides a work progress presentation device that simulation immersed tube stake pile-end defect was handled belongs to foundation or foundation structure's such as hydraulic engineering test technical field. The device comprises a geological simulation mechanism, a pipe sinking cast-in-place pile mechanism, a triple box, a sedimentation display mechanism and a load simulation mechanism, wherein the geological simulation mechanism comprises a base, a geological box, a weathered rock stratum, a mucky soil layer, a clay layer and a partition plate, the weathered rock stratum, the mucky soil layer, the clay layer and the partition plate are positioned in the geological box; the load simulation mechanism comprises a force transmission tray and weights. The method and the device are applied to simulating the state of the immersed tube cast-in-place pile, can visually display the immersed tube cast-in-place effect, and can realize the predictability of the state of the immersed tube cast-in-place pile.
Description
Technical Field
The application relates to a construction process demonstration device for simulating pile end defect treatment of a immersed tube pile, and belongs to the technical field of tests of foundations or foundation structures such as hydraulic engineering.
Background
With the continuous improvement of the requirements on the safety of buildings, the quality requirements of pile foundations are higher and higher. The bearing capacity of the pile foundation is one of the standards for measuring the quality of the pile foundation. Therefore, whether the bearing capacity of the pile foundation meets the design requirement or not is directly related to the safety problem of the upper building.
At present, the immersed tube cast-in-place pile is widely applied due to the advantages of convenient construction, low noise and the like. The pipe sinking cast-in-place pile is suitable for foundations with underground water levels, quicksand, silt and the like, and in construction, when the underground water pressure is too large, the silt can enter a sleeve pipe pile body to form loose soil, so that a foot hanging pile is formed, the bearing capacity of the pile is weakened, and the building is caused to generate large uneven settlement. The lifting foot is a main form of the defect of the pile end of the immersed tube pile.
In order to improve the bearing capacity of the above-mentioned foot hanging accidents of the pipe-sinking cast-in-place pile, researchers have proposed some improvement methods, and there are two common methods, one is a preventive measure, such as: the patent application with the application number of CN 2017209348902 provides a immersed tube for a immersed tube bored concrete pile, which aims to reduce the probability of a foot hanging accident by improving a sleeve pile body and sleeving a seepage-proof tube at the outer side of the bottom end of the immersed tube body to prevent underground water from entering the immersed tube; the other is reinforcement measures after the foot hanging accident occurs, namely mortar is poured, but the method cannot avoid the foot hanging accident, the corresponding reinforcement measures and the reinforcement effect are unpredictable, a large amount of manpower and material resources are consumed, and the efficiency is very low.
Disclosure of Invention
In view of this, the present application provides a presentation device that can realize immersed tube bored concrete pile state simulation, and this presentation device can simulate out the foot of hanging accident of immersed tube bored concrete pile during site operation to demonstrate the effect after the reinforcement measure together, the visual display immersed tube effect of filling, realize the predictability of immersed tube bored concrete pile state.
Specifically, the method is realized through the following scheme:
a construction process demonstration device for simulating pile end defect treatment of a immersed tube pile comprises a geological simulation mechanism, a immersed tube cast-in-place pile mechanism, a triple box, a settlement display mechanism and a load simulation mechanism, wherein the geological simulation mechanism comprises a base, a geological box, and a weathered rock stratum, a mucky soil layer and a clay layer which are positioned in the geological box, the weathered rock stratum, the mucky soil layer and the clay layer are sequentially arranged from bottom to top, a partition plate is arranged above the clay layer, and a plurality of immersed tube holes are formed in the partition plate; the immersed tube filling pile mechanism comprises a prefabricated pile tip, a sleeve and a pile body, wherein the prefabricated pile tip is connected with the bottom of the sleeve, the pile body is arranged in the sleeve, and a prefabricated pile head, the sleeve and the pile body penetrate through a weathered rock stratum, a mucky soil layer and a clay layer; a nitric acid solution, a protein solution and rubber particles are arranged in the triple box; the settlement display mechanism comprises a pile top cover, a contact piece, a base, a display lamp and a lifting rod, wherein the pile top cover is sleeved on the pile body, the contact piece is positioned on one side of the pile top cover, the base is placed on the partition plate, the display lamp is arranged on the front surface of the base, the lifting rod is arranged on the upper portion of the base, a groove is formed in the top of the lifting rod, and the contact piece is in joggle joint with the groove so that the lifting rod and the pile top cover are connected into a whole; the load simulation mechanism comprises a force transferring tray and weights, the force transferring tray is positioned on the pile top cover, and the weights are positioned on the force transferring tray.
When the device is used for simulating different states of the immersed tube cast-in-place pile, the following steps are carried out:
(1) simulating the soil quality of a construction site:
a gray plastic cushion, blue plastic foam, green plastic foam and a partition plate with a sink hole are sequentially arranged in a geological box from bottom to top, wherein the gray plastic cushion represents a weathered rock stratum, the blue plastic foam represents a mucky soil layer, and the green plastic foam represents a clay layer, so that different soil textures of a construction site are simulated.
(2) Simulating a hanging foot pile accident:
(2.1) fixing the model:
and (4) making the prefabricated pile tip and the sleeve into a whole to obtain the immersed tube cast-in-place pile model. And filling a layer of cotton wool with the thickness of about 10-20 mm at the bottom of the sleeve, pouring the nitric acid solution in the triple box to a set scale mark along the inner wall of the sleeve, and then putting the immersed tube filling pile model into the immersed tube hole of the partition plate to ensure that the outer wall of the sleeve is matched with the immersed tube hole, thereby fixing the immersed tube filling pile model.
(2.2) forming a soft soil layer:
protein solution is dripped into the bottom of the sleeve, cotton wool with nitric acid solution is changed from white to yellow, so that the simulation reality is realized, sludge enters the sleeve to form a soft soil layer, and a foot hanging pile is formed.
(3) Displaying pile bearing capacity:
(3.1) the bearing capacity of the hanging foot pile is embodied:
putting the pile body into the sleeve until the bottom of the pile body contacts cotton wool; sleeving the pile top cover on the top of the pile body, and adjusting the lifting rod to enable the groove and the contact piece to be joggled; putting the force transmission tray on the pile top cover, and putting the weight on the force transmission tray for pressurization; when the force transmission tray transmits force to the pile top cover, the pile body compresses cotton wool at the bottom of the sleeve due to stress, so that sedimentation is generated, and the sedimentation display mechanism and the pile body generate the same sedimentation due to the joggle connection; when settlement is generated by 5mm or more, the bottom of the lifting rod touches the switch, the power supply is switched on, the display lamp is on, and when the display lamp is on, the time is recorded.
(3.2) simulating grouting effect:
removing the weights, the force transmission tray and the pile top cover, taking out the pile body and separating the pile body from the sleeve; restoring the lifting rod of the settlement display mechanism to the highest position; and pouring black rubber particles with the particle size of less than 2mm into the triple box in the yellow liquid until the yellow liquid is submerged, thereby representing the state of the immersed tube bored concrete pile after the soft soil layer is grouted.
(3.3) the bearing capacity after grouting is represented as follows:
and putting the pile body into the sleeve again until the bottom of the pile body contacts black rubber particles. The pile top cover is sleeved on the top of the pile body, and the lifting rod of the settlement display mechanism is adjusted to enable the groove to be in joggle joint with the contact piece of the pile top cover. And (3) putting the force transmission tray on the pile top cover, putting weights on the force transmission tray for pressurization, observing the lighting condition of the lamp, and recording time. If the display lamp on the base is not on or the lamp-on time is longer than that before grouting, the bearing capacity of the pile foundation is increased after grouting.
(4) And cleaning and arranging the die.
The solid model presentation device realizes the processes of lifting piles and grouting by means of the matching of the sleeve, the column body and the load simulation mechanism, and changes of bearing capacity before and after grouting, thereby effectively simulating the lifting accident scene of the immersed tube cast-in-place pile and displaying the effect of rising of the pile bearing capacity after taking reinforcement measures.
Preferably, we have further studied the geological modeling mechanism and determined that the more preferred geological modeling mechanism is: the geological box is a transparent box body, the geological box is positioned on the base, and the base preferably adopts a square structure. The partition plate is preferably made of rubber plates, each edge of the partition plate is provided with 2-6 immersed tube holes, and preferably, the front edge and the rear edge of the partition plate are provided with 2 immersed tube holes, and the number of the immersed tube holes is 4, so that the immersed tube cast-in-place pile model is fixed. Geological simulation mechanism is transparent cuboid structure, can adopt the plastic foam of different colours to express different soil layers to simulate different construction environment, ground can be dissected to glass board all around three-dimensionally, and geological simulation structure is all transparent all around, and the baffle is equipped with a plurality of heavy tube holes, has increaseed the pile foundation quantity that can simulate, has improved efficiency.
As a preference, we have further studied the driven cast-in-place pile mechanism and determined that the more preferred driven cast-in-place pile mechanism is: the prefabricated pile tip is a solid plastic semi-cone, the sleeve is a hollow plastic semi-cylinder, and the pile body is a solid semi-cylinder; the bottom of the sleeve is provided with scale marks, and the scale marks are preferably positioned at the position of 20mm of the bottom of the sleeve.
We have further studied the triplets as preferred and determined that the more preferred triplets are: the triple box is formed by connecting three boxes in series, nitric acid solution, protein solution and rubber particles are sequentially filled from left to right, and the nitric acid solution is colorless liquid and is used for dripping into the bottom of the sleeve; the protein solution is colorless thick liquid and is used for reacting with nitric acid; the rubber particles are black rubber particles with the particle size of less than 2mm, and the rubber particles are used as simulation mortar to simulate artificial grouting. When protein solution is dripped into the sleeve pipe, can put into the cotton fibre in the sleeve pipe bottom, the nitric acid solution dropwise add on the cotton fibre, when adding protein solution, the nitric acid solution on the cotton fibre will become yellow by white to when this simulation construction, silt gets into the intraductal soft soil that forms of cover, causes the stake accident of hanging foot, leads to the bearing capacity decline of stake.
Preferably, we have further studied the sedimentation display mechanism and determined that the more preferred sedimentation display mechanism is: the pile top cover is made of hollow semi-cylindrical light metal (preferably aluminum pile top cover) with a cover and without a bottom; the contact piece is a cuboid sheet; the base is a cylinder; the display lamp is a circular plastic lampshade; the lifting rod is a cylinder; the groove is a cuboid groove; the height of the lifting rod can be adjusted at will, so that the settlement can be detected according to different requirements; the pile top cover is made of light metal and is arranged into a hollow cylinder with a cover and without a bottom, and the hollow cylinder can be directly sleeved on the formed pile foundation, so that the pile top cover is convenient and time-saving. A display lamp circuit system is arranged in the base and consists of an electrode, a display lamp and a switch, the electrode is a power source, and the switch is connected with the display lamp in series. Because the lifting rod can be settled along with the pile body, when the settlement reaches a set value such as 5mm, the bottom of the lifting rod can touch a switch in the base, so that the switch is in a closed state, the circuits are communicated, and the display lamp is on; if the display lamp is not on or the time that the lamp is on is longer than that of the hanging foot pile after the manual grouting measure is taken, the bearing capacity of the pile body after grouting is improved to some extent.
Preferably, we further studied the load simulation mechanism and determined that the more preferred load simulation mechanism is: the force transmission tray is a solid semicircular frustum pyramid, and the lower bottom surface of the force transmission tray is matched with the pile top cover. The force transmission tray of the load simulation mechanism is arranged into a circular truncated cone, and the bottom surface of the force transmission tray is matched with the pile top cover, so that force can be transmitted uniformly.
Drawings
FIG. 1 is a schematic overall structure of the present application;
FIG. 2 is a schematic diagram illustrating the effect of the present application when a foot-lifting accident occurs in a simulation cast-in-place pile;
FIG. 3 is a schematic diagram illustrating the effect of the artificial grouting simulation of the present application;
FIG. 4 is a schematic structural diagram of a geological modeling mechanism according to the present application;
fig. 5 is a schematic structural diagram of a driven cast-in-place pile mechanism according to the present application;
FIG. 6 is a schematic diagram of the triple box structure of the present application;
FIG. 7 is a schematic structural view of a sedimentation display mechanism of the present application;
FIG. 8 is a schematic diagram of the internal circuit of the display lamp of the settlement display mechanism of the present application;
fig. 9 is a schematic structural diagram of a load simulation mechanism in the present application.
Reference numbers in the figures: 1. a geological modeling mechanism; 11. a base; 12. a geological box; 13. a weathered rock formation; 14. a mucky soil layer; 15. a clay layer; 16. a partition plate; 17. a pore of the sink; 2. a pipe sinking cast-in-place pile mechanism; 21. prefabricating a pile tip; 22. a sleeve; 23. a pile body; 24. scale lines; 3. a triple header; 31. a nitric acid solution; 32. a protein solution; 33. rubber particles; 4. a settlement display mechanism; 41. pile top covers; 42. a contact piece; 43. a base; 44. a display lamp; 441. a motor; 442. a switch; 45. a lifting rod; 46. a groove; 5. a load simulation mechanism; 51. a force transfer tray; 52. and (4) weighing.
Detailed Description
This embodiment is a work progress presentation device that simulation immersed tube stake pile-end defect was handled, combines fig. 1, includes geological simulation mechanism 1, immersed tube bored concrete pile mechanism 2, trigeminy case 3, subsides and subsides display mechanism 4, load simulation mechanism 5.
Referring to fig. 2 and 3, the geological modeling mechanism 1 is a base 11 with a square bottom, and a geological tank 12 is located on the base 11. Inside the geological box 12 are sequentially a weathered rock stratum 13, a mucky soil layer 14 and a clay layer 15 from bottom to top, which are respectively represented by gray plastic, light blue plastic foam and green plastic foam. Baffle 16 is located the clay layer top, and two edges all have 2 immersed tube holes around baffle 16 for fixed immersed tube bored concrete pile model. The prefabricated pile head 21, the sleeve 22 and the pile body 23 penetrate through three soil layers of the geological box 12, the prefabricated pile tip 21 is connected with the bottom of the sleeve 22, and the pile body 23 can be placed inside the sleeve 22; the triple box 3 is formed by connecting three boxes in series, and is sequentially filled with a nitric acid solution 31, a protein solution 32 and rubber particles 33 from left to right; the pile top cover 41 is sleeved on the pile body 23, the contact piece 42 is positioned on one side of the pile top cover 41, the base 43 is placed on the partition board 16 in the geological box 12, the display lamp 44 is arranged on the front surface of the base 43, the lifting rod 45 is arranged on the upper part of the base 43, and the groove 46 is arranged at the top of the lifting rod 45; the force transfer tray 51 is located on the pile top cap 41 and the weight 52 is located on the force transfer tray 51.
As an alternative case:
with reference to fig. 4, the geological simulation mechanism 1 is composed of a base 11, a geological box 12, weathered rocks 13, mucky soil 14, clay 15, a partition plate 16 and immersed tube holes 17, wherein the base 11 is a solid wood cuboid with the length of 220mm, the width of 220mm and the height of 20 mm; the geological box 12 is a glass cuboid with no cover and a length of 200mm, a width of 200mm and a height of 120mm, and is formed by bonding four pieces of transparent glass with a length of 200mm, a width of 200mm and a thickness of 5 mm; the weathered rock layer 13 is a gray plastic pad with an average thickness of 30mm and is positioned at the bottom layer of the geological box 12; the mucky soil layer 14 is a light blue foam layer with an average thickness of 50mm and is positioned in the middle layer of the geological box 12; the clay layer 15 is a green foam layer with an average thickness of 30mm, and is positioned on the mucky soil layer 14; the partition plate 16 is a rubber cuboid with the length of 190mm, the width of 190mm and the thickness of 5mm and is positioned at the top of the geological box 12; the counter sink holes 17 are semicircular holes with the radius of 15mm and the thickness of 5mm, are arranged on the partition plate 16, 2 counter sink holes 17 are arranged on the front edge and the rear edge of the partition plate 16, and the edge distance between every two adjacent counter sink holes 17 is 45 mm.
Referring to fig. 5, the driven cast-in-place pile mechanism 2 is composed of a prefabricated pile tip 21, a sleeve 22, a pile body 23 and scale marks 24.
As an alternative case:
the prefabricated pile tip 21 is a solid plastic semicircular cone with the radius of 15mm and the height of 20mm, the sleeve 22 is a hollow plastic semicircular cylinder with the outer diameter of 30mm, the height of 80mm and the wall thickness of 2mm, the pile body 23 is a solid semicircular cylinder with the diameter of 26mm and the height of 120mm, and the scale mark 24 is positioned at the position of 20mm at the bottom of the sleeve 22.
Referring to fig. 6, the triple box 3 is formed by bonding three uncovered cubes with the length of 30mm, the width of 30mm and the height of 30mm, and nitric acid solution 31, protein solution 32 and rubber particles 33 are contained in the triple box, wherein the nitric acid solution 31 is colorless liquid and is positioned in a left box of the triple box 3 and is used for dropping into cotton wool at the bottom of the sleeve 22; the protein solution 32 is colorless thick liquid and is used for reacting with the nitric acid solution 31; the rubber particles 33 are black rubber particles with the particle size of less than 2mm and are used for simulating mortar, so that manual grouting is simulated.
The working principle of the triple box 3 is as follows: the protein solution 32 turns yellow when meeting the nitric acid solution 31, when the protein body 32 is dripped into the sleeve 22, the cotton wool with the nitric acid solution 31 at the bottom of the sleeve 22 turns yellow from white, so that during the simulation construction, sludge enters the sleeve 22 to form soft soil, a foot hanging pile accident is caused, and the bearing capacity of the pile is reduced.
Referring to fig. 7, the settlement display mechanism 4 is composed of a pile top cover 41, a contact piece 42, a base 43, a display lamp 44, a lifting rod 45 and a groove 46, wherein the contact piece 42 is joggled with the groove 46 of the lifting rod 45, so that the lifting rod 45 and the pile top cover 41 are connected into a whole, and the consistent settlement amount of the lifting rod 45 and the pile body 23 is ensured. The force transfer tray 51 transfers the force to the pile cap 41 by the weight 52 pressing, which then causes the shaft 23 to compress the cotton wool at the bottom of the sleeve 22, resulting in settlement. In the base 43, a display lamp circuit system is provided, and with reference to fig. 8, the display lamp circuit system is composed of an electrode 441, a display lamp 44 and a switch 442, the electrode 61 is a power source, and the switch 442 is connected in series with the display lamp 44.
As an alternative case:
the pile top cover 41 is a hollow semi-cylinder light metal (such as aluminum) with a diameter of 30mm and a height of 20mm, a cover and no bottom; the contact sheet 42 is a cuboid sheet with the length of 30mm, the width of 5mm and the height of 5 mm; the base 43 is a cylinder with the diameter of 30mm and the height of 20 mm; the display lamp 44 is a circular plastic lampshade with the diameter of 5 mm; the lifting rod 45 is a cylinder with the diameter of 20mm and the height of 30 mm; the groove 46 is a cuboid groove with the length of 20mm, the width of 5mm and the height of 5 mm.
Referring to fig. 9, the load simulation mechanism 5 is composed of a force transfer tray 51 and a weight 52.
As an alternative:
the force transmission tray 51 is a solid semicircular frustum with the upper bottom diameter of 20mm and the lower bottom diameter of 26mm, and the lower bottom surface is matched with the pile top cover 41; weight 52 is an experimental standard 5g weight used for pressurization.
Because the lifting rod 45 can be settled along with the pile body 23, when the settlement reaches 5mm, the bottom of the lifting rod 45 can touch the switch 442 of the display lamp circuit system in the base 43, so that the switch 442 is in a closed state, the circuit is connected, and the display lamp 44 is on; if the display lamp 44 is not on or the time of the lamp on is longer than that of the hanging foot pile after the manual grouting measures are taken, the bearing capacity of the pile body 23 is improved after grouting.
The use process of the demonstration device comprises the following steps:
(1) simulating the soil texture of a construction site 1:
in the geological box 12, a gray plastic cushion, a blue plastic foam, a green plastic foam and a partition plate 16 are sequentially placed from bottom to top, wherein the gray plastic cushion represents a weathered rock stratum 13, the blue plastic foam represents a mucky soil layer 14, and the green plastic foam represents a clay layer 15, so that different soil textures of a construction site are simulated.
(2) Simulating a hanging foot pile accident:
(2.1) fixing the model:
and (3) integrating the precast pile tip 21 with the sleeve 22 to obtain the cast-in-place pile model. A layer of cotton wool with the thickness of about 15mm is plugged at the bottom of the sleeve 22, the nitric acid solution 31 in the triple box 3 is poured to the position of the scale mark 24 along the inner wall of the sleeve 22, and then the cast-in-place-pile model is placed into the immersed tube hole 17 of the partition plate 16, so that the outer wall of the sleeve 22 is matched with the immersed tube hole 17, and the cast-in-place-pile model is fixed.
(2.2) forming a soft soil layer:
when the protein solution 32 in the triple box 3 is dripped into the bottom of the sleeve 22, the cotton wool with the nitric acid solution 31 is changed from white to yellow, so that the simulation of the fact that sludge enters the sleeve to form a soft soil layer to form a foot hanging pile is realized.
(3) Displaying pile bearing capacity:
(3.1) the bearing capacity of the hanging foot pile is embodied:
the shaft 23 is placed into the sleeve 22 until the bottom of the shaft 23 contacts the cotton wool. The pile top cover 41 is fitted over the top of the pile body 23, and the lifting lever 45 of the settlement display mechanism 4 is adjusted so that the groove 46 is joggled with the contact piece 42 of the pile top cover 41. The force transfer tray 51 of the load simulation mechanism 5 was placed on the pile cap 41 and the weight 52 was placed on the force transfer tray 51 for pressurization. When the force transfer tray 51 transfers force to the pile cap 41, the pile body 22 is forced to compress the batting at the bottom of the sleeve 22, thereby causing settlement. The lifting rod 45 of the settlement display mechanism 4 can generate the same settlement with the pile body due to the joggle relation. When the sedimentation is 5mm or more, the bottom of the lifting rod 45 contacts the switch 442 on the base 43, and the power source 441 is turned on, so that the display lamp 44 on the base 43 is turned on. When the display light is on, the time is recorded.
(3.2) simulating grouting effect:
the weight 52, force transfer tray 51 and pile top cover 41 are removed and the shaft 23 is removed, allowing the shaft 23 and sleeve 22 to be separated. The lifting rod 45 of the settlement display mechanism 4 is restored to the original position. And pouring black rubber particles with the particle size of less than 2mm into the triple box 3 in the medium which is changed into yellow until the black rubber particles are submerged in the yellow medium, so as to represent the state of the immersed tube cast-in-place pile after the soft soil layer is grouted.
(3.3) the bearing capacity after grouting is represented as follows:
the shaft 23 is re-inserted into the casing 22 until the bottom of the shaft 23 contacts the black rubber particles. The pile top cover 41 is fitted over the top of the pile body 23, and the lifting lever 45 of the settlement display mechanism 4 is adjusted so that the groove 46 is joggled with the contact piece 42 of the pile top cover 41. The force transfer tray 51 was placed on the pile cap 41 and the weight 52 was placed on the force transfer tray 51 for pressurization, the light was observed and the time was recorded. If the display lamp on the base 43 is not on, or the lamp-on time is longer than that before grouting, the bearing capacity of the pile foundation is increased after grouting.
(4) And cleaning and arranging the die.
The demonstration device has the following advantages:
(1) the geological simulation mechanism 1 is a transparent cuboid structure, different soil layers are represented by plastic foams with different colors so as to simulate different construction environments, and the surrounding glass plates can be used for three-dimensionally analyzing the foundation.
(2) Because the periphery of the geological simulation mechanism 1 is transparent, and the clapboard 16 is provided with the plurality of immersed tube holes 17, the number of pile foundations which can be simulated is increased, and the efficiency is improved.
(3) The principle that protein turns yellow when meeting nitric acid is applied: when the protein solution 32 is dripped into the sleeve 22, the cotton wool with the nitric acid solution 31 changes from white to yellow, so that during the simulated construction, sludge enters the sleeve 22 to form soft soil, and a foot hanging pile accident is caused, and the bearing capacity of the pile is reduced.
(4) The settlement display mechanism 4 is provided with a lifting rod 45, and the height can be adjusted at will, so that the settlement amount can be detected according to different requirements.
(5) The pile top cover 41 is a light metal pile top cover which is arranged into a hollow cylinder with a cover and without a bottom and can be directly sleeved on the formed pile foundation, so that convenience and time saving are realized;
(6) the force transfer tray 51 of the load simulation mechanism 5 is arranged into a circular truncated cone, and the bottom surface of the force transfer tray is matched with the pile top cover 41, so that force can be uniformly transferred.
Claims (10)
1. The utility model provides a simulation immersed tube stake pile-end defect processing's work progress presentation device which characterized in that: the device comprises a geological simulation mechanism, a pipe sinking cast-in-place pile mechanism, a three-header box, a sedimentation display mechanism and a load simulation mechanism, wherein the geological simulation mechanism comprises a base, a geological box, and a weathered rock stratum, a mucky soil layer and a clay layer which are positioned in the geological box, the weathered rock stratum, the mucky soil layer and the clay layer are sequentially arranged from bottom to top, a partition plate is arranged above the clay layer, and a plurality of pipe sinking holes are formed in the partition plate; the immersed tube filling pile mechanism comprises a prefabricated pile tip, a sleeve and a pile body, wherein the prefabricated pile tip is connected with the bottom of the sleeve, the pile body is arranged in the sleeve, and the prefabricated pile tip, the sleeve and the pile body penetrate through a weathered rock stratum, a mucky soil layer and a clay layer; a nitric acid solution, a protein solution and rubber particles are arranged in the triple box; the settlement display mechanism comprises a pile top cover, a contact piece, a base, a display lamp and a lifting rod, wherein the pile top cover is sleeved on the pile body, the contact piece is positioned on one side of the pile top cover, the base is placed on the partition plate, the display lamp is arranged on the front surface of the base, the lifting rod is arranged on the upper portion of the base, a groove is formed in the top of the lifting rod, and the contact piece is in joggle joint with the groove so that the lifting rod and the pile top cover are connected into a whole; the load simulation mechanism comprises a force transferring tray and weights, the force transferring tray is positioned on the pile top cover, and the weights are positioned on the force transferring tray.
2. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: each side of the partition plate is provided with 2-6 counter sink holes.
3. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the partition plate is a transparent plate.
4. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the bottom of the sleeve is provided with scale marks, and the scale marks are located at the position of 10-30 mm of the bottom of the sleeve.
5. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the three-header is formed by connecting three boxes in series, and nitric acid solution, protein solution and rubber particles are sequentially filled from left to right.
6. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the particle size of the rubber particles is less than 2 mm.
7. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the pile top cover is made of hollow semi-cylinder metal with a cover and without a bottom.
8. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the pile top cover is an aluminum pile top cover.
9. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: a display lamp circuit system is arranged in the base and consists of an electrode, a display lamp and a switch, the electrode is a power source, and the switch is connected with the display lamp in series.
10. The device for demonstrating the construction process of simulating the defect treatment of the pile end of the immersed tube pile according to claim 1, wherein: the force transmission tray is a solid semicircular frustum pyramid, and the lower bottom surface of the force transmission tray is matched with the pile top cover.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113883996A (en) * | 2021-09-14 | 2022-01-04 | 中铁西北科学研究院有限公司 | Simulation device and analysis method for influence of foundation additional stress on superstructure |
| CN114197545A (en) * | 2021-12-09 | 2022-03-18 | 中铁建设集团中原建设有限公司 | Test method for simulating precast pile hammering pile sinking |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007068903A1 (en) * | 2005-12-12 | 2007-06-21 | Terrain Geotechnical Consultants Limited | A pile test apparatus |
| AU2012101235A4 (en) * | 2012-08-14 | 2012-09-13 | Patented Foundations Pty Ltd | Rapid load capacity test |
| CN104091509A (en) * | 2014-06-19 | 2014-10-08 | 北京工业大学 | Cast-in-situ bored pile teaching solid model and teaching demonstration method |
| CN105185217A (en) * | 2014-06-19 | 2015-12-23 | 北京工业大学 | Driven pile construction teaching entity model and teaching demonstration method therefor |
| CN107059849A (en) * | 2017-04-28 | 2017-08-18 | 安徽理工大学 | A kind of driven cast-in-place pile and its construction technology |
| CN206516250U (en) * | 2017-02-28 | 2017-09-22 | 许昌职业技术学院 | A kind of metal friction stake sedimentation demonstrator |
-
2020
- 2020-06-12 CN CN202010533833.XA patent/CN111926868B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007068903A1 (en) * | 2005-12-12 | 2007-06-21 | Terrain Geotechnical Consultants Limited | A pile test apparatus |
| AU2012101235A4 (en) * | 2012-08-14 | 2012-09-13 | Patented Foundations Pty Ltd | Rapid load capacity test |
| CN104091509A (en) * | 2014-06-19 | 2014-10-08 | 北京工业大学 | Cast-in-situ bored pile teaching solid model and teaching demonstration method |
| CN105185217A (en) * | 2014-06-19 | 2015-12-23 | 北京工业大学 | Driven pile construction teaching entity model and teaching demonstration method therefor |
| CN206516250U (en) * | 2017-02-28 | 2017-09-22 | 许昌职业技术学院 | A kind of metal friction stake sedimentation demonstrator |
| CN107059849A (en) * | 2017-04-28 | 2017-08-18 | 安徽理工大学 | A kind of driven cast-in-place pile and its construction technology |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883996A (en) * | 2021-09-14 | 2022-01-04 | 中铁西北科学研究院有限公司 | Simulation device and analysis method for influence of foundation additional stress on superstructure |
| CN113883996B (en) * | 2021-09-14 | 2024-02-02 | 中铁西北科学研究院有限公司 | Simulation device and analysis method for influence of foundation additional stress on upper structure |
| CN114197545A (en) * | 2021-12-09 | 2022-03-18 | 中铁建设集团中原建设有限公司 | Test method for simulating precast pile hammering pile sinking |
| CN114197545B (en) * | 2021-12-09 | 2023-03-10 | 中铁建设集团中原建设有限公司 | Test method for simulating precast pile hammering pile sinking |
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