CN214695564U - A protect a structure more for construction of karst cave area bridge pile foundation - Google Patents
A protect a structure more for construction of karst cave area bridge pile foundation Download PDFInfo
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- CN214695564U CN214695564U CN202120787247.8U CN202120787247U CN214695564U CN 214695564 U CN214695564 U CN 214695564U CN 202120787247 U CN202120787247 U CN 202120787247U CN 214695564 U CN214695564 U CN 214695564U
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Abstract
The utility model relates to a bridge pile foundation construction technical field, concretely relates to a many protect a structure for karst cave area bridge pile foundation construction, protect a section of thick bamboo and protect a section of thick bamboo down on protecting a section of thick bamboo, centre including from the top down setting gradually, on protect a section of thick bamboo and be higher than pile foundation ground setting, the centre protects a vertical setting and downthehole and be a plurality of at the pile foundation, and the lower extreme circumference that protects a section of thick bamboo on evenly is provided with a plurality of connecting plates, and the centre protects an upper end and be provided with the connecting plate with draw-in groove, lower extreme that the connecting plate corresponds that are provided with of the upper end of a section of thick bamboo, and the upper end that protects a section of thick bamboo down is provided with the draw-in groove, protects a section of thick bamboo on the adjacent, centre and protects through connecting plate and draw-in groove swing joint down between a section of thick bamboo. The utility model provides an it is great that the multisection steel that adopts among the prior art in solution cavity pile foundation construction protects a section of thick bamboo and leads to protecting a section of thick bamboo sinking resistance through fixed connection such as flange to and fixed connection's multisection steel protects a section of thick bamboo and concrete contact, and frictional force is big, takes out the problem of difficulty, simple structure, convenient to use.
Description
Technical Field
The utility model relates to a bridge pile foundation construction technical field, concretely relates to a protect a section of thick bamboo structure more for karst cave area bridge pile foundation construction.
Background
Pile foundation construction under complex geological conditions has been a major difficulty in engineering, particularly for pile foundations in karst cave regions. In the traditional construction, a karst cave area generally adopts a grouting method or a steel casing follow-up method. The grouting method can cause concrete over-square caused by the karst cave in the pouring process of the concrete, waste the concrete and cause pollution to underground water resources connected with the karst cave, so a steel casing follow-up method is generally adopted for karst cave areas with more karst caves or larger heights.
The steel casing that the steel casing follow-up method used is mostly the whole system of rolling up of steel sheet, carries out the in-process of pile foundation construction, and the steel casing can protect the hole stake, prevents to collapse the hole, plays the positioning action to the drill bit simultaneously.
Most of steel casing barrels in the prior art are used for one time, materials are wasted, but a plurality of casing barrels are connected through a connecting structure and then used, but most of the existing casing barrels are fixedly connected through connecting structures such as flanges, and the flanges on the outer sides of the casing barrels after connection can increase resistance when the casing barrels are vibrated and sunk, so that the difficulty of vibration and sinking of the casing barrels is increased; meanwhile, the conventional multi-section steel casing is fixedly connected, and the whole inner side of the casing is contacted with concrete during recovery, so that the friction force is large and the casing is difficult to take out.
Disclosure of Invention
In order to solve the multisection steel that adopts among the prior art in the construction of solution cavity pile foundation and protect a section of thick bamboo and lead to protecting a section of thick bamboo sinking resistance great through fixed connection such as flange to and fixed connection's multisection steel protects a section of thick bamboo and concrete contact, and frictional force is big, takes out the problem of difficulty, the utility model provides a many pile casings structure for construction of solution cavity area bridge pile foundation.
The utility model provides a protect a section of thick bamboo structure more for construction of solution cavity area bridge pile foundation, protects a section of thick bamboo and protects a section of thick bamboo down including from the top down setting gradually on, protect a section of thick bamboo and protect a section of thick bamboo in the middle of, the middle vertical setting that protects a section of thick bamboo is downthehole and be a plurality of at the pile foundation, the lower extreme circumference that protects a section of thick bamboo on evenly is provided with a plurality of connecting plates, and the middle draw-in groove, the lower extreme that protect the upper end of a section of thick bamboo and be provided with the connecting plate that corresponds with the connecting plate, the upper end of protecting a section of thick bamboo down is provided with the draw-in groove, protects a section of thick bamboo on adjacent, in the middle of protecting and protect down through connecting plate and draw-in groove swing joint between the section of thick bamboo.
Further, the upper protection cylinder, the middle protection cylinder and the lower protection cylinder are steel cylinders with the same inner diameter and outer diameter.
Furthermore, the connecting plate is a circular arc steel plate which is vertically arranged at the lower ends of the upper protective cylinder and the middle protective cylinder, a circular arc boss is arranged on the side face of the bottom of the connecting plate, and the boss is clamped with the clamping groove.
Furthermore, the clamping grooves are uniformly formed in the circumferential direction of the upper ends of the middle protective cylinder and the lower protective cylinder.
Furthermore, the clamping groove is an arc-shaped groove, the width of the clamping groove is twice of the width of the connecting plate, and a baffle is arranged on one side of the upper end of the clamping groove and used for clamping the boss.
Further, the distance between the inner side of the clamping groove and the baffle is equal to the thickness of the upper part of the connecting plate.
Furthermore, a certain distance is reserved between the baffle and the boss.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model comprises an upper protective cylinder, a middle protective cylinder and a lower protective cylinder which are movably connected through a connecting plate and a clamping groove, wherein the connecting plate and the clamping groove are correspondingly matched, so that the protective cylinders can be mutually clamped in the sinking process, the whole axis of the protective cylinders is ensured to be consistent, the deflection is avoided, and the protective cylinders are convenient to disassemble and connect; the inner diameter and the outer diameter of the upper protective cylinder, the middle protective cylinder and the lower protective cylinder are the same, the inner side and the outer side of the integral protective cylinder are smooth and have no other connecting pieces, the resistance of the protective cylinder is reduced, and the protective cylinder is convenient to sink.
The connecting plate is an arc-shaped steel plate, the side face of the bottom of the connecting plate is provided with a boss which is conveniently clamped with the clamping groove, and the connecting plate can be connected with a protective cylinder below the connecting plate when the protective cylinder is pulled out and pulled out together, so that the recovery is convenient; the clamping grooves are formed in a plurality of positions and are evenly arranged along the circumferential direction of the upper ends of the middle protective cylinder and the lower protective cylinder, so that the protective cylinders are uniformly stressed and are easy to pull out; the width of the clamping groove is twice of the width of the connecting plate, and a baffle is arranged on one side of the upper part of the clamping groove, so that the connecting plate can be conveniently clamped; the distance between the inner side of the clamping groove and the baffle is equal to the thickness of the upper part of the connecting plate, so that the connecting plate is ensured to be stably clamped, the coaxiality of the upper protective cylinder, the middle protective cylinder and the lower protective cylinder is ensured, and the deflection is avoided; the space is reserved between the baffle and the boss, so that the protective barrel on the upper portion can be guaranteed to be separated from the initial setting concrete firstly when the protective barrel is pulled out, then the boss at the bottom of the connecting plate drives the baffle to take out the protective barrel below, resistance is reduced, and the protective barrel is convenient to pull out and recycle.
Drawings
Fig. 1 is the utility model relates to a many casings structure's that is used for karst cave area bridge pile foundation construction schematic diagram.
Fig. 2 is the utility model relates to a structural sketch map of a section of thick bamboo is protected on protecting a section of thick bamboo structure more for karst cave area bridge pile foundation construction.
Fig. 3 is the utility model relates to a structure schematic diagram of a section of thick bamboo is protected to centre that is used for a many of karst cave area bridge pile foundation construction to protect a section of thick bamboo structure.
Fig. 4 is the utility model discloses a lower of a many casings structure that protects for construction of solution cavity area bridge pile foundation protects a schematic structure drawing.
Fig. 5 is the utility model relates to a structure sketch map when a many protect a structure to extract for karst cave area bridge pile foundation construction.
The reference numbers are: the device comprises an upper protective barrel 1, a middle protective barrel 2, a lower protective barrel 3, a connecting plate 4, a clamping groove 5, a boss 401 and a baffle 501.
Detailed Description
The invention will be further explained with reference to the following figures and specific examples:
as shown in figures 1-4, a protect a structure more for construction of solution cavity area bridge pile foundation, include from the top down that sets gradually on protect a section of thick bamboo 1, the middle section of thick bamboo 2 and protect a section of thick bamboo 3 down, on protect a section of thick bamboo 1, the middle section of thick bamboo 2 and protect a section of thick bamboo 3 down for the equal same steel drum of internal diameter and external diameter, on protect a section of thick bamboo 1 and be higher than pile foundation ground setting, the middle vertical setting of section of thick bamboo 2 that protects is downthehole and be a plurality of in the pile foundation, the lower extreme circumference that protects a section of thick bamboo 1 on evenly is provided with a plurality of connecting plates 4, and the upper end that protects a section of thick bamboo 3 down is provided with draw-in groove 5, protects a section of thick bamboo 1, the middle section of thick bamboo 2 and protects through connecting plate 4 and draw-in groove 5 swing joint down between the section of thick bamboo 3 on the adjacent.
The connecting plate 4 is an arc steel plate vertically arranged at the lower ends of the upper protective barrel 1 and the middle protective barrel 2, arc bosses 401 are welded on the side surface of the bottom of the connecting plate 4, clamping grooves 5 corresponding to the connecting plate 4 are arranged at the upper end of the middle protective barrel 2, the connecting plate 4 is arranged at the lower end of the middle protective barrel, the clamping grooves 5 are uniformly arranged along the circumferential direction of the upper ends of the middle protective barrel 2 and the lower protective barrel 3, the bosses 401 are clamped with the clamping grooves 5, the clamping grooves 5 are arc grooves, the width of the clamping grooves 5 is twice of the width of the connecting plate 4, a baffle 501 is welded on one side of the upper end of the clamping grooves 5, the baffle 501 is used for clamping the bosses 401, the distance between the inner side of the clamping grooves 5 and the baffle 501 is equal to the thickness of the upper part of the connecting plate 4, a certain distance is reserved between the baffle 501 and the bosses 401, the space is convenient for the protective barrel at the upper part to be firstly separated from concrete when the protective barrel is pulled out, and then the protective barrel at the lower part is driven to be separated from the concrete by the connecting plate 4, the recovery protecting cylinder is convenient to hang out.
When the utility model is used, a worker firstly hangs the lower pile casing 3 above a pile foundation hole through a lifting appliance and stably places the lower pile casing 3, then the lower pile casing 3 sinks through a vibration hammer, and simultaneously a drilling machine arranged in the lower pile casing 3 drills, when the lower pile casing 3 sinks to the upper end of the lower pile casing 3 and is higher than a pile foundation hole by 40cm, the sinking is stopped, two parallel square timbers are placed at the upper end of the lower pile casing 3, then the middle pile casing 2 is hung on the square timbers through the lifting appliance, then the connecting plate 4 on the middle pile casing 2 is aligned with the clamping groove 5 at the top of the lower pile casing 3 and is clamped in, the middle pile casing 2 is rotated by a certain angle through the lifting appliance until the lug boss 401 is completely clamped in the baffle 501, then the middle pile casing 2 is slightly lifted through the lifting appliance and is placed after the worker takes out the square timbers, the middle pile casing 2 is clamped with the connecting plate 4 and the clamping groove 5, the sinking work is continuously carried out, because the distance between the clamping groove 5 and the baffle 501 is equal to the thickness of the upper part of the boss, therefore, in the sinking process, the middle pile casing 2 and the lower pile casing 3 are axially fixed and cannot deviate, and the overall verticality of the pile casings is ensured; and continuously repeating the steps in the sinking process, installing a proper number of middle protective barrels 2 according to needs, and finally installing the upper protective barrels 1, wherein the sinking work is finished when the upper protective barrels 1 sink to 40cm away from the ground.
Then, a worker installs a reinforcement cage and a conduit in the pile casing, the conduit is poured after being checked, the pile casing is pulled out after the concrete is initially set, specifically, as shown in fig. 5, because a certain distance is reserved between a baffle 501 and a boss 401, the installation is convenient, meanwhile, in the process of pulling out the pile casing, the upper pile casing 1 is firstly separated from the concrete, the boss 401 after separation is lifted in a clamping groove 5 for a distance and then touches the baffle 501, the middle pile casing 2 of the second section is pulled up under the action of the baffle 501, the middle pile casing 2 of the second section is separated from the concrete, in the process of integrally pulling out, the upper pile casing 1, the middle pile casing 2 and the lower pile casing 3 are sequentially separated from the concrete, the pile casing can be separated through rotation after leaving a pile foundation, for example, after the upper pile casing 1 and the middle pile casing 2 of the first section completely leave a pile foundation hole, a wood pile casing is arranged between the middle pile casing 2 of the first section and the middle pile casing 2 of the second section, protect a section of thick bamboo 1 on rotating through the hoist, will go up and protect a section of thick bamboo 1 and protect a section of thick bamboo 2 and break away from in the middle of the first section of thick bamboo, then be connected the hoist with protect a section of thick bamboo 2 upper end in the middle of the first section of thick bamboo, continue to protect a section of thick bamboo and extract, all protect a section of thick bamboo at last and all take out, accomplish the recovery, convenient to use.
The utility model discloses an on protect a section of thick bamboo 1, the centre protect a section of thick bamboo 2 and protect 3 inner walls of a section of thick bamboo and outer wall down and be the smooth surface, conveniently sink and extract, can not cause the interference to the rig that protects a section of thick bamboo internally mounted simultaneously, overall structure is simple, conveniently retrieves used repeatedly.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.
Claims (7)
1. The utility model provides a protect a section of thick bamboo structure more for construction of solution cavity area bridge pile foundation, protects a section of thick bamboo (1), middle fender section of thick bamboo (2) and protects a section of thick bamboo (3) down including from the top down setting gradually on, on protect a section of thick bamboo (1) and be higher than pile foundation ground setting, its characterized in that, the middle vertical setting that protects a section of thick bamboo (2) is downthehole and be a plurality of at the pile foundation, the lower extreme circumference that protects a section of thick bamboo (1) on evenly is provided with a plurality of connecting plates (4), the middle draw-in groove (5) that protect an upper end of (2) and be provided with and connecting plate (4) with connecting plate (4), the lower extreme is provided with draw-in groove (5), protects a section of thick bamboo (3) on the adjacent, middle fender section of thick bamboo (2) and protects under and through connecting plate (4) and draw-in groove (5) swing joint between a section of thick bamboo (3).
2. The multi-casing structure for construction of the bridge pile foundation in the karst cave area according to claim 1, wherein the upper casing (1), the middle casing (2) and the lower casing (3) are steel cylinders with the same inner diameter and outer diameter.
3. The multi-casing structure for construction of the bridge pile foundation in the karst cave region according to claim 1, wherein the connecting plate (4) is an arc steel plate vertically arranged at the lower end of the upper casing (1) and the middle casing (2), an arc boss (401) is arranged on the side surface of the bottom of the connecting plate (4), and the boss (401) is clamped with the clamping groove (5).
4. The multi-casing structure for construction of the bridge pile foundation in the karst cave area according to claim 3, wherein the clamping grooves (5) are multiple and are circumferentially and uniformly arranged along the upper ends of the middle casing (2) and the lower casing (3).
5. The multi-casing structure for construction of the bridge pile foundation in the karst cave region according to claim 4, wherein the clamping groove (5) is an arc-shaped groove, the width of the clamping groove (5) is twice that of the connecting plate (4), a baffle (501) is arranged on one side of the upper end of the clamping groove (5), and the baffle (501) is used for clamping the boss (401).
6. The multi-casing structure for construction of the bridge pile foundation in the karst cave region according to claim 5, wherein the distance between the inner side of the clamping groove (5) and the baffle plate (501) is equal to the thickness of the connecting plate (4).
7. The multi-casing structure for construction of the bridge pile foundation in the karst cave area according to claim 6, wherein a certain distance is reserved between the baffle plate (501) and the boss (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120787247.8U CN214695564U (en) | 2021-04-17 | 2021-04-17 | A protect a structure more for construction of karst cave area bridge pile foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120787247.8U CN214695564U (en) | 2021-04-17 | 2021-04-17 | A protect a structure more for construction of karst cave area bridge pile foundation |
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| CN214695564U true CN214695564U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120787247.8U Active CN214695564U (en) | 2021-04-17 | 2021-04-17 | A protect a structure more for construction of karst cave area bridge pile foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351693A (en) * | 2022-03-02 | 2022-04-15 | 四川志德岩土工程有限责任公司 | Collapse hole underpinning device for rotary excavating cast-in-place pile and underpinning construction method |
-
2021
- 2021-04-17 CN CN202120787247.8U patent/CN214695564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351693A (en) * | 2022-03-02 | 2022-04-15 | 四川志德岩土工程有限责任公司 | Collapse hole underpinning device for rotary excavating cast-in-place pile and underpinning construction method |
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