CN112681982B - Piping prevention device for full casing of full rotary drilling machine - Google Patents
Piping prevention device for full casing of full rotary drilling machine Download PDFInfo
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- CN112681982B CN112681982B CN202011295500.4A CN202011295500A CN112681982B CN 112681982 B CN112681982 B CN 112681982B CN 202011295500 A CN202011295500 A CN 202011295500A CN 112681982 B CN112681982 B CN 112681982B
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Abstract
The invention provides a full casing piping prevention device of a full rotary drilling machine, which comprises: a protective barrel; wherein, the middle position of the protective cylinder is provided with a plurality of protective cylinder water permeable holes along the circumferential direction of the protective cylinder; the periphery of the protective cylinder is provided with a permeable soil isolation layer at the position provided with the protective cylinder permeable hole. According to the invention, through the casing water permeable holes on the casing, groundwater around the casing enters the casing from the casing water permeable holes, so that piping caused by sand particles flowing into the casing due to the fact that the groundwater enters the casing from the bottom of the casing is avoided; through the soil layer that separates that permeates water that is arranged at the periphery of the hole that permeates water of protecting the section of thick bamboo, form the soil system that separates that permeates water, make the in-process groundwater get into from the soil system that separates that permeates water and protect in the section of thick bamboo, avoided protecting the section of thick bamboo bottom to get into from protecting the section of thick bamboo and cause piping, the sand phenomenon in the section of thick bamboo, reached and guaranteed to protect the water around the section of thick bamboo and get into protecting the section of thick bamboo along protecting the hole that permeates water of section of thick bamboo and block sand granule and get into protecting the section of thick bamboo in, and then reach the purpose that sand granule runs off.
Description
Technical Field
The invention relates to the technical field of municipal engineering, in particular to a full casing piping prevention device of a full rotary drilling machine.
Background
In urban bridge construction, a newly built bridge is inevitably intersected with a subway and a tunnel, and meanwhile, the requirements of the subway and the tunnel on surrounding soil deformation are high, so that the conventional pile foundation construction method with large stratum disturbance and large noise such as a bored pile cannot meet the requirements. Therefore, the full casing full rotary drilling machine is adopted for construction under the working condition.
The full-rotation drilling machine construction has the characteristics of small disturbance to soil layers, small deformation and the like, but is easy to generate piping phenomenon and has no practical preventive measure for construction in the soil taking process in the pile casing under the complex working conditions of thicker sandy soil layers, high water level and the like, and once the piping phenomenon occurs, the construction cannot be smoothly carried out, the safety of subways and tunnels is seriously threatened, and huge losses are caused to society, people and lives and properties.
Disclosure of Invention
In view of the above, the invention provides a full casing piping prevention device of a full rotary drilling machine, which aims to solve the existing problems.
The invention provides a full casing piping prevention device of a full rotary drilling machine, which comprises: a protective barrel; the middle position of the protective cylinder is provided with a plurality of protective cylinder water permeable holes along the circumferential direction of the protective cylinder so that groundwater at the periphery of the protective cylinder flows into the protective cylinder from the protective cylinder water permeable holes; the periphery of the protective cylinder is provided with a permeable soil isolation layer at the position provided with the protective cylinder permeable hole, so as to prevent sand particles from entering the protective cylinder.
Further, according to the full casing piping preventing device of the full rotary drilling machine, the casing water permeable holes are multiple groups and are arranged at intervals along the axial direction of the casing.
Further, according to the full casing piping prevention device of the full rotary drilling machine, the sets of casing water permeable holes are all arranged in a ring shape and are uniformly distributed.
Further, in the full casing piping prevention device of the full rotary drilling machine, a protective layer is arranged on the periphery of the permeable soil isolation layer and used for protecting the permeable soil isolation layer.
Further, according to the full casing piping preventing device of the full rotary drilling machine, the protective water permeable holes are formed in the protective layer along the circumferential direction of the protective layer at intervals, so that groundwater at the periphery of the casing flows through the protective layer, the permeable soil isolation layer and the casing in sequence.
Further, in the full casing piping prevention device of the full rotary drilling machine, the protective layer is a metal pipe sleeved on the periphery of the permeable soil-isolating layer.
Further, according to the full casing piping prevention device of the full rotary drilling machine, the metal pipe is an iron pipe.
Further, the full casing piping prevention device of the full rotary drilling machine is characterized in that the permeable soil isolation layer is of a net structure.
Further, the full casing piping prevention device of the full rotary drilling machine is characterized in that a cutting tool bit is arranged at the bottom end of the casing and used for cutting soil layers.
Further, in the full casing piping preventing device of the full rotary drilling machine, the number of the cutting tool bits is multiple, and the cutting tool bits are arranged at intervals along the circumferential direction of the casing at the bottom end of the casing.
According to the full casing piping prevention device of the full rotary drilling machine, through the casing water-permeable holes on the casing, the underground water around the casing enters the casing from the casing water-permeable holes, so that piping caused by sand particles flowing into the casing due to the fact that the underground water enters the casing from the bottom of the casing is avoided; the permeable soil isolation layer is arranged on the periphery of the permeable hole of the pile casing to form a permeable soil isolation system, so that groundwater enters the pile casing from the permeable soil isolation system in the soil taking process, piping and sand flowing caused by entering the pile casing from the bottom of the pile casing are avoided, water around the pile casing is ensured to enter the pile casing along the permeable hole of the pile casing, and sand particles are prevented from entering the pile casing, so that the purpose of sand particle loss is achieved; the protective layer is arranged on the periphery of the permeable soil isolation layer, so that the aim of protecting the permeable soil isolation layer from being damaged is fulfilled. The device simple to install, all parts can be prefabricated in advance, and the intention is novel, the principle is reliable, has great market spreading value.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of a full casing piping prevention device of a full rotary drilling machine according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the structure between a casing and a cutting bit provided in an embodiment of the present invention;
fig. 3 is a schematic view of the structure between a casing, a cutting bit and a permeable and soil-resistant layer according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 3, a preferential structure of a full casing piping prevention device of a full rotary drilling machine according to an embodiment of the present invention is shown. As shown, the apparatus includes: the protective cylinder 1, the permeable soil isolation layer 2, the protective layer 3 and the cutting tool bit 4; wherein, the liquid crystal display device comprises a liquid crystal display device,
the middle position of the casing 1 is provided with a plurality of casing water permeable holes 11 along the circumferential direction of the casing 1, so that groundwater at the periphery of the casing 1 flows into the casing 1 from the casing water permeable holes 11, and piping caused by that the groundwater enters the casing 1 from the bottom of the casing 1 to cause sand particles to flow into the casing 1 is avoided. Specifically, the casing water permeable hole 11 may be disposed in a height range before and after soil is taken in the casing 1, so that when the grab bucket takes the soil in the casing 1, groundwater around the casing 1 flows into the casing 1 from the casing water permeable hole 11; to facilitate the flow of groundwater, the casing water permeable holes 21 may preferably be arranged in multiple groups and at intervals along the axial direction of the casing 1 (vertical direction as shown in fig. 2); further preferably, each group of casing water penetration holes 21 are arranged in a ring shape, and each ring of casing water penetration holes 21 are uniformly arranged, as shown in fig. 2, a plurality of rings of casing water penetration holes 21 uniformly arranged along the peripheral wall of the casing 1 are arranged at the middle position of the casing 1; of course, other arrangements are also possible, and the present embodiment is not limited thereto.
The periphery of the casing 1 is provided with a permeable soil-isolating layer 2 at the position provided with the casing permeable holes 11 for preventing sand particles from entering the casing 1. Specifically, the permeable soil isolation layer 2 can be a net structure, namely a permeable soil isolation net, and can be coated on the periphery of the position, where the pile casing 1 is provided with the pile casing permeable holes 11, so as to form a permeable soil isolation system, so that water around the pile casing can permeate the permeable soil isolation net, and meanwhile, soil particles are prevented from entering the pile casing 1, and further, the phenomenon that sand particles run off, namely quicksand, is avoided.
The periphery of the permeable soil isolation layer 2 is provided with a protective layer 3 for protecting the permeable soil isolation layer 2 so as to prevent the permeable soil isolation layer 2 from being damaged due to soil friction. Specifically, the protective layer 3 may be a metal tube sleeved on the periphery of the permeable soil-isolating layer 2, and of course, may also be a tubular structure made of other materials, which is not limited in this embodiment; the protective layer 3 can be fixed on the permeable soil-isolating layer 2 in a welding or other connecting mode, and the permeable soil-isolating layer 2 can be clamped and fixed between the metal pipe 3 and the protective cylinder 1, so that the protection of the permeable soil-isolating layer 2 is realized, and the fixation of the permeable soil-isolating layer 2 can also be realized; the welding thickness of the protective layer 3 is the same as that of the protective layer 3, so that the phenomenon of stress concentration at the welding seam is avoided; the metal pipe is a sheet iron pipe, namely, the sheet iron is wrapped around the periphery of the permeable soil-isolating layer 2. In order to prevent the protective layer 3 from blocking the groundwater from flowing into the casing 1, a plurality of protective permeable holes 31 are preferably formed in the protective layer 3 along the circumferential direction thereof at intervals, so that the groundwater on the periphery of the casing 1 flows through the protective layer 3, the permeable soil layer 2 and the casing 1 in sequence, and flows into the casing 1. The protection water permeable holes 31 may be arranged in a multi-turn arrangement manner, or may be arranged in other manners, which are not limited in this embodiment. Preferably, the diameter of the protective permeable holes 31 may be slightly smaller than the diameter of the casing permeable holes 11, and the distribution density of the protective permeable holes 31 may be greater than the distribution density of the casing permeable holes 11, so as to further improve the smoothness of water outside the casing 1 entering the casing 1 through the protective layer 3 and the permeable and soil-insulating layer 2.
The bottom end of the casing 1 (with respect to the position shown in fig. 1) is provided with a cutting bit 4 for cutting the soil layer for cutting the soil during construction of the full rotary drill. Specifically, the cutting tips 4 may be alloy tips, which may be plural and disposed at intervals along the circumferential direction of the casing 1 at the bottom end of the casing 1. The cutting bit 4 and the casing 1 may be fixedly connected by welding, or may be fixed by other means, which is not limited in this embodiment.
The manufacturing method of the full casing piping prevention device of the full rotary drilling machine comprises the following steps:
firstly, manufacturing a pile casing 1 and a cutting tool bit 4, and circumferentially welding the cutting tool bit 4 at the bottom of the pile casing 1, so as to be convenient for cutting soil during construction of a full-circle rotary drilling machine, and circumferentially drilling pile casing water permeable holes 11 which are uniformly distributed in a plurality of circles along the wall of the pile casing 1 in the height range before and after soil sampling of the pile casing 1; then, the permeable soil isolation layer 2, namely the permeable soil isolation net, is arranged along the circumferential direction of the water permeable holes 11 of the pile casing, the permeable soil isolation net is tensioned along the circumferential direction, the joint is tightly sewn, water around the pile casing 1 is convenient to permeate the permeable soil isolation net, and meanwhile soil particles are prevented from entering the pile casing; finally, arrange the protection iron sheet around the soil isolation net that permeates water in the ring direction and regard as inoxidizing coating 3 for protection soil isolation net that permeates water is avoided the soil layer friction to damage when full slewing drilling machine construction, weld at protection iron sheet ring direction junction, with unnecessary welding slag clearance point simultaneously, make welding position thickness the same with iron sheet thickness, prevent that the stress concentration phenomenon from appearing in welding seam department, and bore the iron sheet hole as protection hole 31 that permeates water on the protection iron sheet, the iron sheet hole is slightly less than the hole that permeates water of a protection section of thick bamboo and the distribution of iron sheet hole is denser than the hole that permeates water of a protection section of thick bamboo, the water outside the protection section of thick bamboo of being convenient for is through iron sheet hole and soil isolation net that permeates water gets into in the protection section of thick bamboo.
In summary, according to the full casing piping preventing device for the full rotary drilling machine provided by the embodiment, through the casing water permeable holes 11 arranged in the casing 1, groundwater around the casing 1 enters the casing 1 from the casing water permeable holes 11, so that piping caused by that the groundwater enters the casing 1 from the bottom of the casing 1 to cause sand particles to flow into the casing 1 is avoided; the permeable soil isolation layer 2 is arranged on the periphery of the pile casing permeable holes 11 to form a permeable soil isolation system, so that groundwater enters the pile casing from the permeable soil isolation system in the soil sampling process, piping and sand flowing phenomena caused by entering the pile casing from the bottom of the pile casing are avoided, water around the pile casing 1 is ensured to enter the pile casing 1 along the pile casing permeable holes 11, sand particles are prevented from entering the pile casing 1, and the purpose of sand particle loss is further achieved; the protective layer is arranged on the periphery of the permeable soil isolation layer 2, so that the aim of protecting the permeable soil isolation layer 2 from being damaged is fulfilled. The device simple to install, all parts can be prefabricated in advance, and the intention is novel, the principle is reliable, has great market spreading value.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. The utility model provides a full barrel casing prevents piping device of full slewing drilling machine which characterized in that includes: a protective barrel; wherein, the liquid crystal display device comprises a liquid crystal display device,
the middle position of the protective cylinder is provided with a plurality of protective cylinder water permeable holes along the circumferential direction of the protective cylinder so that groundwater at the periphery of the protective cylinder flows into the protective cylinder from the protective cylinder water permeable holes;
the periphery of the protective cylinder is provided with a permeable soil isolation layer at the position provided with the protective cylinder permeable hole, so as to prevent sand particles from entering the protective cylinder;
the periphery of the permeable soil isolation layer is provided with a protective layer for protecting the permeable soil isolation layer;
the permeable soil isolation layer is of a net structure; the bottom end of the protective cylinder is provided with a cutting tool bit for cutting the soil layer;
a plurality of protection water permeable holes are formed in the protection layer along the circumferential direction of the protection layer at intervals, so that groundwater at the periphery of the protection barrel flows through the protection layer, the water permeable soil-isolating layer and the protection barrel in sequence;
the diameter of the protection permeable hole is smaller than that of the protection barrel permeable hole, and the distribution density of the protection permeable hole is larger than that of the protection barrel permeable hole.
2. The full casing piping prevention device of the full rotary drilling machine according to claim 1, wherein,
the protection barrel water permeable holes are multiple groups and are arranged at intervals along the axial direction of the protection barrel.
3. The full casing anti-piping device of a full rotary drilling machine according to claim 2, wherein the sets of casing water permeable holes are all arranged in a ring shape and uniformly arranged.
4. The full casing piping prevention device of a full rotary drill according to any one of claims 1 to 3, wherein the protective layer is a metal pipe sleeved on the periphery of the permeable soil-barrier layer.
5. The full casing anti-piping device of a full rotary drill according to claim 4, wherein the metal pipe is a steel pipe.
6. The full casing piping prevention device of a full rotary drill according to any one of claims 1 to 3, wherein,
the cutting tool bit is a plurality of, and it is at the bottom of pile casing along the circumference interval setting of pile casing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011295500.4A CN112681982B (en) | 2020-11-18 | 2020-11-18 | Piping prevention device for full casing of full rotary drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011295500.4A CN112681982B (en) | 2020-11-18 | 2020-11-18 | Piping prevention device for full casing of full rotary drilling machine |
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| CN112681982B true CN112681982B (en) | 2023-05-16 |
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| CN114563542A (en) * | 2022-02-28 | 2022-05-31 | 中国林业科学研究院生态保护与修复研究所 | Underground water monitoring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595252A (en) * | 1994-07-28 | 1997-01-21 | Flowdril Corporation | Fixed-cutter drill bit assembly and method |
| CN201713812U (en) * | 2010-06-03 | 2011-01-19 | 中国建筑第七工程局有限公司 | Underwater drilling pile foundation protective cylinder |
| CN102644274A (en) * | 2012-04-17 | 2012-08-22 | 中铁隧道集团三处有限公司 | Pile-forming construction method for penetrating through existing structure by fender post |
| CN207567840U (en) * | 2017-10-17 | 2018-07-03 | 上海宝冶集团有限公司 | The anti-underground casing waterborne gushed in basement bored pile construction |
| CN110018020A (en) * | 2019-04-11 | 2019-07-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of drilling underground water device for fetching water |
| CN211435283U (en) * | 2019-10-29 | 2020-09-08 | 洛阳圣鑫重工科技有限公司 | Special balanced water pressure formula filter pressing device surges |
| CN211713956U (en) * | 2019-11-26 | 2020-10-20 | 浙江大学城市学院 | Underwater cast-in-situ bored pile steel casing mounting device |
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