CN111364531B - Meet in-cylinder and out-cylinder net pulp load box - Google Patents
Meet in-cylinder and out-cylinder net pulp load box Download PDFInfo
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- CN111364531B CN111364531B CN202010354130.0A CN202010354130A CN111364531B CN 111364531 B CN111364531 B CN 111364531B CN 202010354130 A CN202010354130 A CN 202010354130A CN 111364531 B CN111364531 B CN 111364531B
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- pulling
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- 239000007788 liquid Substances 0.000 claims abstract description 79
- 238000009825 accumulation Methods 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 239000007787 solid Substances 0.000 claims description 19
- 239000002360 explosive Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 206010030113 Oedema Diseases 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 20
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
Abstract
The invention relates to a load box used in a foundation pile self-balancing static load test, in particular to a load box capable of meeting the net slurry inside and outside a cylinder. The hydraulic device comprises a liquid inlet pipe, a liquid outlet pipe, a cylinder body and a piston, wherein a cavity is formed in the cylinder body, and an opening of the cavity faces downwards; the piston is in clearance fit with the cavity, and a liquid accumulation open caisson is arranged on the piston, the liquid inlet pipe penetrates through the upper surface of the cylinder body and the liquid outlet pipe penetrates through the upper surface of the cylinder body and is inserted into the liquid accumulation open caisson. The invention has the following advantages: 1. ensures the quality of the slurry and improves the filling rate. 2. Can meet the requirement of loading slurry inside and outside the cylinder. 3. The engineering pile is ensured to meet the design requirement of pulling resistance. 4. The pile body strength and the integrity of the foundation pile are ensured. 5. Ensures that the grouting body outside the cylinder is high-purity clean grouting. 6. The upper plate structure is convenient for laying pipelines for connecting the load boxes. 7. A plurality of cylinders are connected in series, so that the integral liquid adding, liquid discharging and grouting of the load box can be realized.
Description
Technical Field
The invention relates to a load box used in a foundation pile self-balancing static load test, in particular to a load box capable of meeting the net slurry inside and outside a cylinder.
Background
In the foundation pile self-balancing static load test, the load box is generally provided with only one liquid injection pipe, so that the liquid which is never solidified is filled between the cylinder body and the piston of the load box body after the test, and after the foundation pile self-balancing static load test, the pile generates the liquid in the load box cylinder under the vertical compression state of engineering and is extruded to generate displacement.
Although the existing load box can realize liquid drainage and grouting through two pipes, because the two pipes are all at the same elevation on the side edge of the upper end of the cylinder body, the liquid below the elevation of the liquid outlet can not be drained completely due to the fact that the two pipes are only extruded above the elevation of the liquid outlet in grouting, and the injected slurry is diluted by retained liquid, so that the concentration of the slurry is reduced, the final setting strength of the slurry is seriously reduced, and the reinforcing requirement is not met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a net slurry load box which can realize grouting, ensure slurry quality and improve filling rate at the same time and can meet the requirements of in-cylinder and out-cylinder.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the hydraulic device comprises a liquid inlet pipe, a liquid outlet pipe, a cylinder body and a piston, wherein a cavity is formed in the cylinder body, an opening of the cavity faces downwards, and the axial direction of the cavity is consistent with that of the cylinder body; the piston is in clearance fit with the cavity, a liquid accumulation open caisson is arranged on the piston, the liquid inlet pipe penetrates through the upper surface of the cylinder body and is inserted, the insertion end is positioned above the piston, the liquid outlet pipe penetrates through the upper surface of the cylinder body and is inserted into the liquid accumulation open caisson, and the bottom of the liquid outlet pipe is close to the bottom of the liquid accumulation open caisson; the side wall of the cylinder body is provided with a pressure relief valve which is used for relieving pressure when the load exceeds the maximum pressure value of the cylinder body after the piston moves downwards; the plurality of hydraulic devices are connected in series with adjacent liquid inlet pipes and liquid outlet pipes through connecting pipes; the lower plate is fixed with the piston, and the upper plate and the lower plate are movably connected.
Preferably, the pressure release valve comprises a pressure release channel, a solid pressure limiting piece and a hollow screw, wherein an opening of the pressure release channel is formed in the inner wall of the cylinder body, the solid pressure limiting piece is arranged between the pressure release channel and the hollow screw, and an opening of the hollow screw is formed in the outer wall of the cylinder body.
Further, the anti-pulling lock structure is used for limiting the piston in the cylinder body when the piston moves downwards and comprises an anti-pulling lock head and an anti-pulling lock groove which are matched with each other, the anti-pulling lock head is arranged in a through hole on the side wall of the cylinder body, and the head end of the anti-pulling lock head faces the side wall of the piston; the anti-pulling locking groove is formed in the side wall of the upper portion of the piston, and the opening end of the anti-pulling locking groove faces the inner wall of the cylinder body.
Preferably, the anti-pulling lock head comprises a lock head, a spring and a base which are connected in sequence, wherein the lock head is limited in the through hole by the piston, the base is fixed with the cylinder body, and the spring is compressed between the lock head and the base.
Preferably, the number of the anti-pulling lock structures is at least two, and the anti-pulling lock structures are oppositely arranged.
Preferably, a sealing groove is formed in the side wall of the piston and used for placing a sealing ring, and the sealing groove is located above the anti-pulling locking groove.
Further, the device also comprises a pressure limiting explosive grouting device, which comprises two cylinder outer grouting vertical pipes and two reversing pipes, wherein the two cylinder outer grouting vertical pipes are used as outer grouting vertical pipes and a lower displacement wire sheath, the lower displacement wire is fixed in the cylinder outer grouting vertical pipes, two ends of the reversing pipe are respectively inserted into the cylinder outer grouting vertical pipes, and the horizontal part of the reversing pipe is fixed with the lower plate.
Preferably, a pressure release valve is arranged in the reversing pipe, the pressure release valve comprises a pressure release channel, a solid pressure limiting piece and a hollow screw, the pressure release channel is communicated with the reversing pipe, the solid pressure limiting piece is arranged between the pressure release channel and the hollow screw, the pressure limiting value of the solid pressure limiting piece is smaller than the pressure bearing value of the reversing pipe, and the opening of the hollow screw is positioned on the pipe wall of the reversing pipe.
Preferably, the upper plate is of a rigid lattice structure.
Preferably, an H-shaped waterproof connecting guard plate is arranged between the upper plate and the lower plate, the rigid side plate of the upper plate is inserted into the upper part of the H-shaped waterproof connecting guard plate and fixed, and the rigid side plate of the lower plate is inserted into the lower part of the H-shaped waterproof connecting guard plate.
Preferably, the H-shaped waterproof connecting guard plate is made of flexible waterproof materials.
Preferably, the depth of the dropsy open caisson is larger than a theoretical displacement amount value of the piston when the self-balancing static load pile test is met.
Compared with the prior art, the invention has the following advantages:
1. by designing the hydrops open caisson, the cavity in the cylinder body before grouting is ensured, so that the grouting body in the cylinder body is high-purity clean grouting, the quality of the grouting body is ensured, and the filling rate is improved.
2. The cylinder body is additionally provided with a pressure release valve, so that slurry can be loaded inside and outside the cylinder.
3. The anti-pulling lock structure not only ensures that the piston is limited in the cylinder body when moving, but also ensures that when the load box is subjected to upward pulling force by the steel reinforcement cage at the upper end, the anti-pulling force is effectively transmitted to the lower steel reinforcement cage through the anti-pulling lock, and the engineering pile meets the design requirement of anti-pulling after the foundation pile self-balancing static load test pile is ensured.
4. The gap between the cylinder bodies is filled up by the arrangement of the pressure-limiting explosive grouting device, so that the pile body strength and the integrity of the foundation pile are ensured, and the load on the upper part of the load box is effectively transferred to the pile body on the lower part of the load box.
5. The H-shaped waterproof connecting guard board enables the side edge of the whole load box to be sealed in a circle, so that after the self-balance detection of the foundation pile is achieved, the piston in the cylinder body in the load box cannot displace due to loading, underground water around the pile permeates and wraps the outside of the cylinder, and the grouting body outside the cylinder is ensured to be high-purity clean grouting.
6. The upper plate of the load box adopts a rigid lattice structure to replace a steel plate, so that pipelines for connecting the load boxes can be conveniently laid; after casting the concrete, the lattice members are combined with the concrete to form a high strength, stiff concrete slab.
7. The plurality of cylinders are connected in series through the top connecting pipes, so that the integral liquid adding, liquid discharging and grouting of the load box can be realized.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment 1 of the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic view of the hydraulic device of FIG. 1;
FIG. 4 is a schematic diagram of the relief valve of FIG. 3;
FIG. 5 is a schematic view of the anti-lock of FIG. 3;
FIG. 6 is a schematic structural view of the pressure-limiting explosive grouting device in FIG. 1;
FIG. 7 is a schematic view of the upper plate structure of FIG. 1;
FIG. 8 is a schematic view of the lower plate structure of FIG. 1;
FIG. 9 is a schematic view of the hydraulic device of FIG. 1 in a start-stop condition;
in fig. 1, a hydraulic device; 2. an upper plate; 3. waterproof connecting guard plates; 4. a lower plate; 5. a connecting pipe; 6. the pressure limiting explosive grouting device;
in fig. 3, 7, a liquid inlet pipe; 8. a liquid outlet pipe; 9. a top fixing bolt; 10. a lower fixing bolt; 11. a cylinder; 12. a piston; 17. an anti-pulling lock head; 18. a pressure release valve; 19. an anti-pulling locking groove; 20. sealing groove and sealing ring; 29. a dropsy open caisson;
in fig. 4, 26, pressure relief channels; 27. a solid limiting piece; 28. a hollow screw;
in fig. 5, 23, locking head; 24. a spring; 25. a base;
in fig. 6, 34, lower displacement wire; 35. a lower displacement wire sheath and an outer grouting vertical catheter; 36. a reversing tube; 18. a pressure release valve;
in fig. 7, 30, frame and lattice beams; 31. an upper rigid side plate;
32, bottom plate in fig. 8; 33. a lower rigid side plate.
Detailed Description
In the following embodiments of the present invention, the azimuth terms are described according to the drawings, and do not limit the present invention.
The invention is further described in detail below with reference to fig. 1-9: 1-2, the load box for cleaning slurry inside and outside the cylinder is composed of a hydraulic device 1, an upper plate 2, a waterproof connection guard plate 3, a lower plate 4, a connecting pipe 5 and a pressure-limiting explosive grouting device 6; the hydraulic device 1 is arranged between the upper plate 2 and the lower plate 4 in a plurality and is connected in series through connecting pipes 5; the upper plate 2 is of a rigid lattice structure, the waterproof connecting guard plate 3 is made of flexible waterproof materials, is H-shaped, is movably connected with the upper plate 2 and the lower plate 4, and the pressure-limiting explosive grouting device 6 is fixed on the lower plate 4.
As shown in fig. 3, the hydraulic device 1 comprises a liquid inlet pipe 7, a liquid outlet pipe 8, a cylinder body 11 and a piston 12, wherein the top of the cylinder body 11 is fixed with the upper plate 2 through an upper fixing bolt 9, a cavity is formed in the upper plate, an opening is downward, and the axial direction of the cavity is consistent with that of the cylinder body 11; one end of a piston 12 is inserted into the cavity and is in clearance fit with the cavity, the other end of the piston is fixed with a lower plate 4 through a lower fixing bolt 10, a liquid accumulation open caisson 29 is formed on the piston, a liquid inlet pipe 7 penetrates through the upper surface of the cylinder body and is inserted into the cylinder body, the insertion end is positioned above the piston 12, a liquid outlet pipe 8 penetrates through the upper surface of the cylinder body and penetrates into the liquid accumulation open caisson 29, the bottom of the liquid outlet pipe is close to the bottom of the liquid accumulation open caisson, the axial direction of the liquid accumulation open caisson 29 is consistent with the axial direction of the piston, and the depth of the liquid accumulation open caisson is slightly larger than a theoretical displacement value of the piston 12 when a self-balancing static load test pile is met; the side wall of the cylinder body is provided with a pressure relief valve 18, and when the pressure value in the cylinder body exceeds the pressure bearing value of the cylinder body, the slurry breaks through the pressure relief valve 18, so that the grouting outside the cylinder is satisfied; because a gap exists between the cylinder body 11 and the piston 12, in order to achieve a better sealing effect, a sealing groove and a sealing ring 20 are arranged on the piston 12, and the sealing groove and the sealing ring 20 are arranged above the anti-pulling lock structure.
As shown in fig. 4, the pressure release valve 18 includes a pressure release channel 26, a solid pressure limiting piece 27 and a hollow screw 28, wherein an opening of the pressure release channel 26 is formed on an inner wall of the cylinder 11, the solid pressure limiting piece 27 is arranged between the pressure release channel and the hollow screw, an opening of the hollow screw 28 is formed on an outer wall of the cylinder, and when grouting is performed to enable a pressure value in the cylinder to exceed a maximum pressure value of the cylinder 11, the solid pressure limiting piece 27 is pressed by the pressure release channel 26, so that the solid pressure limiting piece 27 is broken, and the slurry flows out from a center hole of the hollow screw 28.
In order to ensure that the piston 12 is limited in the cylinder body 11 during movement, and simultaneously, when the upper end reinforcement cage of the load box is subjected to upward pulling force, the pulling force is effectively transmitted to the lower reinforcement cage, so that after the foundation pile self-balancing static load test pile is ensured, the engineering pile meets the pulling-resistant design requirement, a pulling-resistant lock structure is additionally arranged between the piston and the cylinder body, as shown in fig. 3 and 5, the pulling-resistant lock device comprises a pulling-resistant lock head 17 and a pulling-resistant lock groove 19 which are matched with each other, the pulling-resistant lock head 17 is arranged at the lower part of the cylinder body 11 and is arranged in a through hole of the side wall, and comprises a lock head 23, a spring 24 and a base 25 which are sequentially connected, wherein the head end of the lock head 23 is in an arc shape and faces the outer wall of the piston 12, the spring 24 is compressed between the lock head 23 and the base 25, the base 25 is fixed with the cylinder body 11, the pulling-resistant lock groove 19 is arranged on the side wall at the upper part of the piston, and the opening end of the pulling-resistant lock groove 19 faces the inner wall of the cylinder body 11. When the piston 12 moves downwards to the position of the anti-pulling lock head 17 opposite to the position of the anti-pulling lock groove 19, the lock head 23 springs into the anti-pulling lock groove 19 under the action of the elastic force of the spring 24, so that the piston and the cylinder body are locked and do not move mutually. In order to make the anti-pulling effect better, the number of the anti-pulling lock structures is two, and the anti-pulling lock structures are oppositely arranged in the two side walls of the cylinder body 11; of course, the number of the anti-pulling locks is not limited to two, and the anti-pulling locks can be multiple, and are generally designed according to the anti-pulling requirement (the number n is equal to or greater than b/a provided that the anti-pulling capacity of each anti-pulling lock is a and the whole anti-pulling requirement is b).
In order to ensure the strength and integrity of the pile body of the foundation pile and ensure that the reinforced load box and the engineering pile form a continuous whole, the upper load of the load box is effectively transferred to the lower pile body of the load box, and a pressure-limiting explosive grouting device is added, as shown in fig. 6, the pressure-limiting explosive grouting device 6 comprises a lower displacement wire 34, a lower displacement wire sheath and outer grouting vertical guide pipe 35, a reversing pipe 36 and a pressure release valve 18, wherein the lower displacement wire 34 is fixed in the lower displacement wire sheath and outer grouting vertical guide pipe 35; the two lower displacement wire jackets and outer grouting vertical pipes 35 are respectively arranged at two ends of the reversing pipe 36, and the cylinder outer grouting vertical pipe and the jacket pipe of the lower displacement wire are integrated into a multifunctional pipe, so that the lower displacement wire 34 can be prevented from being wrapped by concrete, and can be used as a vertical pipe for cylinder outer grouting; two ends of the reversing tube 36 are respectively inserted into a lower displacement wire sheath and an outer grouting vertical guide tube 35, and the horizontal part of the reversing tube is welded and fixed with the lower plate 4, so that the drainage and direction-changing effects are realized; simultaneously, the free ends of the lower displacement wire sheath and the external grouting vertical guide pipe 35 and the reversing pipe 36 extend out of the upper plate 2, and the length L of the vertical part of the reversing pipe 36 is larger than the displacement value of the piston 12 under the self-balancing static load test pile test termination condition; the pressure release valve 18 is arranged in the reversing pipe 36 and comprises a pressure release channel 26, a solid pressure limiting piece 27 and a hollow screw 28, wherein the solid pressure limiting piece 27 is arranged between the pressure release channel 26 and the hollow screw 28, and the pressure limiting value P of the solid pressure limiting piece 27 is a Less than the bearing capacity P of the reversing tube 36 b When the loaded pressure value is P a 、P b When the water-proof connecting guard plate is in a state, the slurry breaks through the solid pressure limiting plate 27, the hollow screws 28 are used for pressure relief, and the slurry fills the gap between the lower plate 4 and the water-proof connecting guard plate 3.
As shown in fig. 7, the upper plate 2 is a rigid lattice structure including a frame and lattice beam 30, and an upper rigid side plate 31, the frame and lattice beam 30 being the upper surface of the upper plate, the upper rigid side plate 31 being disposed around the frame and lattice beam 30. As shown in fig. 9, the lower plate 4 includes a bottom plate 32 and a lower rigid side plate 33, the bottom plate 32 is a rigid plate, the center of the bottom plate 32 is hollow, that is, the bottom plate 32 is annular, the lower rigid side plate 33 is arranged around the bottom plate 32, the upper plate 2 and the lower plate 4 are connected together through a waterproof connection guard plate 3, the waterproof connection guard plate 3 is H-shaped, a flexible material is adopted, a plurality of air vents are formed so that the upper rigid side plate 31 and the lower rigid side plate 33 can be inserted, the upper rigid side plate 31 of the upper plate 2 is wrapped and fixed by the H-shaped upper part, and the lower rigid side plate 33 of the lower plate 4 is wrapped and fixed by the H-shaped lower part. When the load tank is pressurized with liquid, the lower rigid side plate 33 of the lower plate 4 is gradually pulled out along with the piston 12 of the hydraulic device 1.
As shown in fig. 8-9, water is injected into the cavity through the liquid inlet pipe 7, the piston 12 moves downwards relative to the cylinder 11 along with the increase of water quantity, when the anti-pulling locking groove 19 moves to be opposite to the anti-pulling locking head 17, the anti-pulling locking head 17 ejects out, and the piston 12 and the cylinder 11 are locked, so that relative movement does not occur any more.
The implementation steps are as follows:
and (I) filling and pressurizing: when the liquid injection is pressurized, the liquid outlet pipe 8 is closed, and the liquid is injected from the liquid inlet pipe 7;
1. when the liquid is not injected, the piston is at the initial position, and the pressure value p1=p2=p3=p4, as shown in fig. 9 (a);
2. starting liquid injection and pressurization, and injecting from a liquid inlet pipe 7, wherein the pressure value P1 is more than P2 and more than P3 is more than P4;
3. continuously injecting liquid for pressurization, when the anti-pulling lock groove 19 on the piston 12 reaches the position of the anti-pulling lock head 17, the anti-pulling lock head 17 pops up, the locking piston can not move any more, and when the end condition is reached, the pressure value P1=P2=P3=P4 is shown in fig. 9 (b);
4. when the liquid injection and pressurization are continuously carried out, the piston is gradually displaced along with the liquid injection, and the lower rigid side plate 33 of the lower plate 4 also slides in the H-shaped lower groove of the waterproof connecting guard plate 3;
(II) gas-filled liquid discharge: after the liquid injection is completed, starting to aerate and drain liquid, wherein the liquid inlet pipe 7 and the liquid outlet pipe 8 are not closed during the aeration and drain liquid;
5. starting to aerify and drain: injecting gas from the liquid inlet pipe 7, filling the gas into the cylinder 11 from top to bottom, extruding liquid to be discharged from the liquid outlet pipe 8, and enabling the pressure value P1 to be more than P2 to be more than P3 to be more than P4;
6. continuously inflating until the liquid outlet pipe 8 does not discharge liquid, wherein the liquid in the cylinder body is exhausted, stopping inflating, and stopping the inflation until the pressure value P1=P2=P3=P4;
grouting: when the liquid outlet pipe 8 does not discharge liquid, grouting is started;
7. grouting is started: injecting from the liquid inlet pipe 7, wherein the pressure value P1 is more than P2 and more than P3 is more than P4;
8. grouting is continued until the liquid outlet pipe is stopped after slurry overflows, and the pressure value is p1=p2=p3=p4 after stopping;
grouting in (four) direction pressure-limiting explosive grouting device
9. After the lower displacement wire sheath at one end is closed and the vertical guide pipe is externally injected, continuous grouting is carried out until slurry overflows from the other side pipe, and sampling is carried out;
10. after sampling, the overflow end is closed, and then slurry is injected from the inlet end until the pressure release valve is detonated, so that the slurry is forced to naturally flow to and fill up the gap at the load box.
In this example, water was used as the loading liquid, and the slurry was better compatible and less costly than oil.
The above example is only one preferred embodiment of the present invention and does not limit the present invention. The anti-pulling lock device can exist in any load box structure utilizing the jack principle, the pressure-limiting explosive grouting device and the anti-pulling lock device can exist in the same embodiment at the same time, and can also exist in different embodiments separately, namely, the pressure-limiting explosive grouting device is applicable to any load box structure, that is, in the embodiment, the anti-pulling lock device, the pressure-limiting explosive grouting device and the hydraulic device can be matched in various manners, so that different purposes are achieved, and different technical effects are achieved. Any extension, modification, etc. made by those skilled in the art without departing from the working principles of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a satisfy jar inside and outside net pulp load case, includes upper plate, hypoplastron and hydraulic means, its characterized in that: the hydraulic device comprises a liquid inlet pipe, a liquid outlet pipe, a cylinder body and a piston, wherein a cavity is formed in the cylinder body, the opening of the cavity is downward, and the axial direction of the cavity is consistent with the axial direction of the cylinder body; the piston is in clearance fit with the cavity, a liquid accumulation open caisson is arranged on the piston, the liquid inlet pipe penetrates through the upper surface of the cylinder body and is inserted, the insertion end is positioned above the piston, the liquid outlet pipe penetrates through the upper surface of the cylinder body and is inserted into the liquid accumulation open caisson, and the bottom of the liquid outlet pipe is close to the bottom of the liquid accumulation open caisson; the side wall of the cylinder body is provided with a pressure relief valve which is used for relieving pressure when the load exceeds the maximum pressure value of the cylinder body after the piston moves downwards; the plurality of hydraulic devices are connected in series with adjacent liquid inlet pipes and liquid outlet pipes through connecting pipes; the lower plate is fixed with the piston, and the upper plate and the lower plate are movably connected;
an H-shaped waterproof connecting guard plate is arranged between the upper plate and the lower plate, a rigid side plate of the upper plate is inserted into the upper part of the H-shaped waterproof connecting guard plate and fixed, and a rigid side plate of the lower plate is inserted into the lower part of the H-shaped waterproof connecting guard plate; the H-shaped waterproof connecting guard board is made of flexible waterproof materials; the depth of the dropsy open caisson is larger than the theoretical displacement value of the piston when the self-balancing static load pile test is met.
2. The satisfied in-cylinder out-of-cylinder headbox of claim 1, wherein: the pressure release valve comprises a pressure release channel, a solid pressure limiting piece and a hollow screw, wherein an opening of the pressure release channel is formed in the inner wall of the cylinder body, the solid pressure limiting piece is arranged between the pressure release channel and the hollow screw, and an opening of the hollow screw is formed in the outer wall of the cylinder body.
3. The satisfied in-cylinder out-of-cylinder headbox of claim 1, wherein: the anti-pulling lock structure is used for limiting the piston in the cylinder body when the piston moves downwards and comprises an anti-pulling lock head and an anti-pulling lock groove which are matched with each other, the anti-pulling lock head is arranged in a through hole on the side wall of the cylinder body, and the head end of the anti-pulling lock head faces the side wall of the piston; the anti-pulling locking groove is formed in the side wall of the upper portion of the piston, and the opening end of the anti-pulling locking groove faces the inner wall of the cylinder body.
4. A satisfied in-cylinder out-of-cylinder headbox as recited in claim 3, wherein: the anti-pulling lock head comprises a lock head, a spring and a base which are connected in sequence, wherein the lock head is limited in the through hole by a piston, the base is fixed with the cylinder body, and the spring is compressed between the lock head and the base.
5. The satisfied in-cylinder out-of-cylinder payload box of claim 3 or 4, wherein: the number of the anti-pulling lock structures is at least two, and the anti-pulling lock structures are oppositely arranged.
6. A satisfied in-cylinder out-of-cylinder headbox as recited in claim 3, wherein: a sealing groove is formed in the side wall of the piston and used for placing a sealing ring, and the sealing groove is located above the anti-pulling locking groove.
7. The satisfied in-cylinder out-of-cylinder headbox of claim 1, wherein: the pressure-limiting explosive grouting device comprises two cylinder outer grouting vertical pipes and two reversing pipes, wherein the two cylinder outer grouting vertical pipes are used as outer grouting vertical pipes and a lower displacement wire sheath, the lower displacement wire is fixed in the cylinder outer grouting vertical pipes, two ends of the reversing pipes are respectively inserted into the cylinder outer grouting vertical pipes, and the horizontal parts of the reversing pipes are fixed with the lower plate.
8. The satisfied in-cylinder out-of-cylinder headbox of claim 7, wherein: the pressure release valve is arranged in the reversing pipe and comprises a pressure release channel, a solid pressure limiting piece and a hollow screw, wherein the pressure release channel is communicated with the reversing pipe, the solid pressure limiting piece is arranged between the pressure release channel and the hollow screw, the pressure limiting value of the solid pressure limiting piece is smaller than the pressure bearing value of the reversing pipe, and the opening of the hollow screw is positioned on the pipe wall of the reversing pipe.
9. The satisfied in-cylinder out-of-cylinder headbox of claim 1, wherein: the upper plate adopts a rigid lattice structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010354130.0A CN111364531B (en) | 2020-04-29 | 2020-04-29 | Meet in-cylinder and out-cylinder net pulp load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010354130.0A CN111364531B (en) | 2020-04-29 | 2020-04-29 | Meet in-cylinder and out-cylinder net pulp load box |
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| Publication Number | Publication Date |
|---|---|
| CN111364531A CN111364531A (en) | 2020-07-03 |
| CN111364531B true CN111364531B (en) | 2024-03-29 |
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| CN202010354130.0A Active CN111364531B (en) | 2020-04-29 | 2020-04-29 | Meet in-cylinder and out-cylinder net pulp load box |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961266A (en) * | 1995-08-29 | 1997-03-07 | Geotop Corp | Method for testing load of ready-made pile and support device used for the method |
| CN208072491U (en) * | 2018-03-28 | 2018-11-09 | 安徽省建设工程测试研究院有限责任公司 | Internal and external cycle combined type load box |
| CN212641535U (en) * | 2020-04-29 | 2021-03-02 | 江西联保工程咨询有限公司 | Satisfy inside and outside net thick liquid load box of jar |
-
2020
- 2020-04-29 CN CN202010354130.0A patent/CN111364531B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961266A (en) * | 1995-08-29 | 1997-03-07 | Geotop Corp | Method for testing load of ready-made pile and support device used for the method |
| CN208072491U (en) * | 2018-03-28 | 2018-11-09 | 安徽省建设工程测试研究院有限责任公司 | Internal and external cycle combined type load box |
| CN212641535U (en) * | 2020-04-29 | 2021-03-02 | 江西联保工程咨询有限公司 | Satisfy inside and outside net thick liquid load box of jar |
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|---|---|
| CN111364531A (en) | 2020-07-03 |
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