CN205134353U - Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure - Google Patents
Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure Download PDFInfo
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- CN205134353U CN205134353U CN201520919384.7U CN201520919384U CN205134353U CN 205134353 U CN205134353 U CN 205134353U CN 201520919384 U CN201520919384 U CN 201520919384U CN 205134353 U CN205134353 U CN 205134353U
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Abstract
The utility model discloses a prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure, including the concrete pile body that constitutes of cone stake by concrete floor and its top, the concrete pile body is buried underground under the earth's surface in the ever -frozen ground layer, the concrete pile body is assembled by four the same members and is formed, and concave -convex structure is personally submitted in the contact of each adjacent member, and four members are assembled through concave -convex structure lock in proper order, each component middle part sets up a L type ventilation pipe, and each L type ventilation pipe top is provided with prevents the cover that falls. This structure is provided with concrete the groove salient and concave yield simultaneously on the contact surface of the basic subassembly of precast pile, the structure is hourglass form or rhombus form to resist the lifting by frost simultaneously and melt heavy influence. This structure can realize distinguishing effective cooling of pile foundation to the ever -frozen ground, improves the artificial upper limit of ever -frozen ground, and the stability and the foundation bearing capacity of reinforcing pile foundation reduce the pile foundation up -pull and melt heavy possibility and engineering freeze injury.
Description
Technical field
The utility model relates to a kind of combined piles foundation structure in the pile foundation engineering of Permafrost Area, especially can be applicable to a kind of assembling air chimney composite pile foundation structure of high-grade overhead transmission line column foot.
Background technology
Along with the progressively enforcement that strategy to develop western regions and band one tunnel are built, the engineering problem of the extensive high-grade transmission line of electricity in Permafrost Area progressively becomes the object paid close attention to.And in the construction and operation process of In Permafrost Regions of Qinghai-xizang Plateau transmission line of electricity column foot, guarantee that the resistance to overturning of frozen soil and column foot is primary task.Consider level to vertical Load Combination, the uplift load acting on overhead power transmission line pole tower basis is the operating mode that basic engineering must be considered, in Frozen Ground Area, above pulls out after active force superposes with lifting by frost power and greatly will increase lifting by frost unstability accident risk.And all there is bigger difference due to the structural shape of Transmission Tower Foundation Engineering, external loads effect, basis and frozen soil interaction mechanism, the Foundation Design that designs reliability and the other industry adopted, and Frozen Ground Area transmission line foundation resistance to plucking failure mode, destructive process, design theory are not perfect, therefore the column foot stability problem of Permafrost Area still needs further investigation.Consider the ecological environment that Qinghai-Tibet Platean is weak, in order to not destroy local ecology, the restriction for construction and maintenance is more simultaneously.In engineering activity, due in large scale of construction concreting process, the impact of the heat of hydration is very important.Therefore, precast unit and then handling carry out assembling operation to scene, are a kind of effective methods.
Carry out in Permafrost Area in Design of Foundation, construction and operation process, the thermal field of frozen soil foundation and deformation field changes in distribution rule are its important analytic target and Con trolling index.Reciprocal effect problem between too busy to get away ever-frozen ground and engineering is studied to column foot stability, therefore need there is following requirement to foundation soil body: 1. the frozen state as far as possible keeping ever-frozen ground in the operation phase, with the bearing capacity utilizing it higher to prevent basic unstability; 2. heat sink can be utilized to prevent permafrost degradation, effectively improve and Quito year peripherally freeze soil body anthropogenic heating, reduce engineering activity to the invasion of ever-frozen ground; 3. in column foot operation process, in stability analysis, the impact of pulling out should be resisted in basis, also will resist the impact of thaw collapse; 4. component can prefabricated and Assembling, reduces the impact of Engineering Disturbance and the heat of hydration; 5. level of considering is to load action, and foundation structure need have the capacity reserve of opposing horizontal loading.
Generally speaking, need the air utilizing Winter Qinghai Xizang Plateau colder, make cross-ventilation heat exchange can effectively reduce the temperature of pile foundation surrounding soil, and design, construct easy, opposing freeze thawing characteristic remarkable pile foundation less to environmental perturbation, thus provide technical support for the control of the engineering problems such as Permafrost Area pile foundation engineering frost heave, thaw collapse.
Utility model content
In view of above-mentioned, the purpose of this utility model is to provide a kind of efficient air chimney active cooling ground temperature and can resists the assembling air chimney piling strtucture that lifting by frost can resist again thaw collapse to a certain extent simultaneously.Utilize this structure, can effectively reduce foundation soil body ground temperature, improve its bearing capacity of foundation soil, realize the effective lifting to the artificial upper limit of ever-frozen ground, meanwhile, the engineering problem caused for prevention and control body frost heaving and thaw collapse provides technical support.
The purpose of this utility model is achieved through the following technical solutions:
The utility model provides the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost and thaw collapse, comprises one by the concrete pile body that forms of cone pile above concrete floor and its, and concrete pile body to be embedded under earth's surface in permafrost; Described concrete pile body is formed by four parts of identical component assemblies, and the contact surface of each adjacent members is concaveconvex structure, and four parts of components fasten assembled by concaveconvex structure successively; Arrange a L-type air chimney in the middle part of described each component, each L-type air chimney top is provided with anti-fall cover.
Further, described concaveconvex structure comprises convex surface and concave surface, and described convex surface is convex rhombus or convex trapezoidal, and described concave surface assumes diamond in shape groove or dovetail groove; Convex rhombus fastening corresponding with rhombus groove is assembled, and convex trapezoidal fastening corresponding with dovetail groove is assembled.
Further, the convex surface of described concaveconvex structure and concave surface from top to bottom distribute successively from each component inside wall.
Further, described L-type air chimney is laid in the middle part of every module component.
Further, pile crown is extended along cone pile top in described L-type air chimney top, is 90 ° bending extend out to permafrost bottom L-type air chimney to cone pile side-wall outer side.
Further, bottom described L-type air chimney, stretch out an outlet to cone pile side-wall outer side, or cross out along cone pile sidewall multilayer.
The utility model has the advantages that:
1. the utility model makes full use of the stack effect of air chimney and the stronger earth's surface wind energy of Winter Qinghai Xizang Plateau, reduces permafrost ground temperature, promotes Upper Limit of Permafrost.
2. utilize polylith body to assemble, adjacent contact face is arranged and protrudes and recessed hourglass-shaped or diamond shape, the impact that frost heave can resist again thaw collapse after fastening, can be resisted.
3. this setting can be prefabricated in advance, directly assembles in work progress, and after reducing concrete cast-in-situ, the heat of hydration is to the invasion of ever-frozen ground, is particularly useful for heavy excavation pile foundation.
4. piecemeal assembling, reduces the deadweight of every block pile foundation, reduces the difficulty of construction.
5. the PVC that the optional engineering of air chimney material is common, pre-buried when precast unit.
Accompanying drawing explanation
Fig. 1 is the longitudinal section centre section structural representation of air chimney assembling composite construction of the present utility model;
Fig. 2 is the schematic top plan view of air chimney assembling composite construction of the present utility model;
Fig. 3 (a) and 3 (b) are air chimney of the present utility model prefabricated member contact face schematic diagram;
In figure: 1, L-type air chimney; 2, reserved protrusion and recessed concrete pit; 3, the concrete floor of column type pile foundation is bored; 4, column type pile foundation pile body lower whorl profile is bored; 5, column type pile foundation pile crown outer contour is bored; 6, convex surface; 7, concave surface; 8, anti-fall cover.
Detailed description of the invention
The utility model is described in further detail in conjunction with the accompanying drawings and embodiments below, but not as foundation the utility model being done to any restriction.
As shown in Figure 1, Figure 2 with shown in Fig. 3 (a) He Fig. 3 (b), the assembly type ventilation pile foundation structure of the anti-lifting by frost of the utility model and thaw collapse, comprise a concrete pile body be made up of the concrete floor 3 of cone column type pile foundation and the cone pile above it, concrete pile body to be embedded under earth's surface in permafrost; Its pile crown and the outer contour at the bottom of stake are shown in Fig. 2 and bore column type pile foundation pile body lower whorl profile 4 and cone column type pile foundation pile crown outer contour 5, concrete pile body is made up of four parts of identical component assemblies, reserved protrusion and recessed concrete pit 2 is provided with at the contact surface of each adjacent members, form the concaveconvex structure of contact surface, concaveconvex structure comprises convex surface 6 and concave surface 7, convex surface 6 is in convex rhombus or convex trapezoidal, and concave surface 7 assumes diamond in shape groove or dovetail groove; Convex rhombus fastening corresponding with rhombus groove is assembled, and convex trapezoidal fastening corresponding with dovetail groove is assembled, and the convex surface of concaveconvex structure and concave surface from top to bottom distribute successively from each component inside wall, and four parts of components fasten assembled successively.Arrange a L-type air chimney 1 in the middle part of each component, each L-type air chimney 1 top is provided with anti-fall cover 8.L-type air chimney 1 is laid in the middle part of every module component.Pile crown is extended along cone pile top in L-type air chimney 1 top, be 90 ° to cone pile side-wall outer side bottom L-type air chimney 1 and bending extend out to permafrost, stretch out an outlet to cone pile side-wall outer side bottom L-type air chimney, or cross out along cone pile sidewall multilayer.
At the scene in assembled process, the building block of cone pillar pile foundation is prefabricated, and motorization assembly operation at the scene, four parts of components are engaged assembled successively.Between adjacent component, contact surface fastens mutually according to the concaveconvex shape preset, and can reduce lifting by frost amount, can reduce thaw collapse amount again.Component arranges the air chimney of L-type, effectively can reduce the ground temperature of pile foundation and its ever-frozen ground that underlies, promote engineering ground Upper Limit of Permafrost height, increase stability of foundation and bearing capacity of foundation soil.Air chimney quantity, diameter and buried depth can be arranged according to local meteorologic parameter.
Principle of the present utility model is, due to the physical dimension that existing Permafrost Area cone column type pile foundation is larger, make the heat of hydration of poured in place concrete larger to ever-frozen ground disturbance, and ever-frozen ground is to ground temperature and sensitivity thereof, therefore needs mass concrete component is prefabricated and carry out assembled at the scene.Because Permafrost Area pile foundation not only faces the possibility of pulling out inefficacy, also the possibility that thaw collapse lost efficacy is faced, simultaneously in an independent pile foundation, the direction different due to horizontal loading and size, pile body parts different parts is also in different stress states.Therefore pile body design is divided into polylith, reduces the difficulty of construction on the one hand, utilize the recessed position of the protrusion that contact surface is arranged mutually to fasten on the other hand, rely on the relative displacement between two parts to resist the impact of lifting by frost and thaw collapse.Simultaneously L-type air chimney is set at pile body, utilizes the larger cold energy of the stack effect of air chimney and Winter Qinghai Xizang Plateau earth's surface, permafrost is lowered the temperature.
This structure can utilize extraneous colder temperature to strengthen foundation soil body initiatively cooling by vertical " funnel-shaped " air chimney in the winter time, automatically quits work ground temperature is low because ambient temperature is high summer.The utility model can realize the effective temperature-reducing to the high-grade power line column foot in Permafrost Area, funnel-shaped air chimney can accelerate the interchange of heat of air with ever-frozen ground, the pile body component of mutual fastening can prevent frost heave from can prevent thaw collapse again, and effectively improve the anthropogenic heating of ever-frozen ground, strengthen stability and the bearing capacity of foundation soil of tower foundation, reduce on column foot and pull out possibility and engineering freeze injury.In addition, this structure can be prefabricated in advance, assembles at the scene during construction, is applicable to heavy excavation cone column type pile foundation.
The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.
Claims (6)
1. an assembly type ventilation pile foundation structure for anti-lifting by frost and thaw collapse, is characterized in that: comprise one by the concrete pile body that forms of cone pile above concrete floor and its, and concrete pile body to be embedded under earth's surface in permafrost; Described concrete pile body is formed by four parts of identical component assemblies, and the contact surface of each adjacent members is concaveconvex structure, and four parts of components fasten assembled by concaveconvex structure successively; Arrange a L-type air chimney in the middle part of described each component, each L-type air chimney top is provided with anti-fall cover.
2. the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost according to claim 1 and thaw collapse, is characterized in that: described concaveconvex structure comprises convex surface and concave surface, and described convex surface is convex rhombus or convex trapezoidal, and described concave surface assumes diamond in shape groove or dovetail groove; Convex rhombus fastening corresponding with rhombus groove is assembled, and convex trapezoidal fastening corresponding with dovetail groove is assembled.
3. the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost according to claim 1 and thaw collapse, is characterized in that: the convex surface of described concaveconvex structure and concave surface from top to bottom distribute successively from each component inside wall.
4. the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost according to claim 1 and thaw collapse, is characterized in that: described L-type air chimney is laid in the middle part of every module component.
5. the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost according to claim 4 and thaw collapse, it is characterized in that: pile crown is extended along cone pile top in described L-type air chimney top, be 90 ° to cone pile side-wall outer side bottom L-type air chimney and bending extend out to permafrost.
6. the assembly type ventilation pile foundation structure of a kind of anti-lifting by frost according to claim 5 and thaw collapse, is characterized in that: stretch out an outlet to cone pile side-wall outer side bottom described L-type air chimney, or crosses out along cone pile sidewall multilayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520919384.7U CN205134353U (en) | 2015-11-17 | 2015-11-17 | Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure |
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| CN201520919384.7U CN205134353U (en) | 2015-11-17 | 2015-11-17 | Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure |
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| CN205134353U true CN205134353U (en) | 2016-04-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442035A (en) * | 2016-05-18 | 2017-02-22 | 中国能源建设集团甘肃省电力设计院有限公司 | Production apparatus and production method for concrete-frozen soil contact surface direct shear test sample |
| CN107663863A (en) * | 2016-07-29 | 2018-02-06 | 中国科学院寒区旱区环境与工程研究所 | A kind of Permafrost Area pile foundation and its construction technology |
| CN108978714A (en) * | 2018-08-30 | 2018-12-11 | 北京工业大学 | One kind being used for the prefabricated staggered joint erection segment separated column of underground structure |
| CN111910669A (en) * | 2020-08-10 | 2020-11-10 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and method |
| CN112064627A (en) * | 2019-06-10 | 2020-12-11 | 中国科学院寒区旱区环境与工程研究所 | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof |
| CN114108600A (en) * | 2021-11-26 | 2022-03-01 | 华能清能通榆电力有限公司 | Fan foundation of prefabricated sheet pile assembly type connecting structure and construction method thereof |
| CN116734072A (en) * | 2023-08-16 | 2023-09-12 | 中国科学院西北生态环境资源研究院 | Pipeline supporting device for preventing and treating melting and sinking based on gas heat exchange |
| CN115029978B (en) * | 2022-07-05 | 2023-11-10 | 西南石油大学 | Hollow pile frozen soil roadbed space dispersion type ventilation pipeline system and construction method |
-
2015
- 2015-11-17 CN CN201520919384.7U patent/CN205134353U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442035A (en) * | 2016-05-18 | 2017-02-22 | 中国能源建设集团甘肃省电力设计院有限公司 | Production apparatus and production method for concrete-frozen soil contact surface direct shear test sample |
| CN107663863A (en) * | 2016-07-29 | 2018-02-06 | 中国科学院寒区旱区环境与工程研究所 | A kind of Permafrost Area pile foundation and its construction technology |
| CN108978714A (en) * | 2018-08-30 | 2018-12-11 | 北京工业大学 | One kind being used for the prefabricated staggered joint erection segment separated column of underground structure |
| CN112064627A (en) * | 2019-06-10 | 2020-12-11 | 中国科学院寒区旱区环境与工程研究所 | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof |
| CN111910669A (en) * | 2020-08-10 | 2020-11-10 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and method |
| CN111910669B (en) * | 2020-08-10 | 2021-09-03 | 华北电力大学（保定） | Telescopic steel pipe spiral pile foundation for active cooling of frozen soil area and use method |
| CN114108600A (en) * | 2021-11-26 | 2022-03-01 | 华能清能通榆电力有限公司 | Fan foundation of prefabricated sheet pile assembly type connecting structure and construction method thereof |
| CN114108600B (en) * | 2021-11-26 | 2024-03-29 | 华能清能通榆电力有限公司 | Fan foundation with prefabricated sheet pile assembly type connecting structure and construction method thereof |
| CN115029978B (en) * | 2022-07-05 | 2023-11-10 | 西南石油大学 | Hollow pile frozen soil roadbed space dispersion type ventilation pipeline system and construction method |
| CN116734072A (en) * | 2023-08-16 | 2023-09-12 | 中国科学院西北生态环境资源研究院 | Pipeline supporting device for preventing and treating melting and sinking based on gas heat exchange |
| CN116734072B (en) * | 2023-08-16 | 2023-11-03 | 中国科学院西北生态环境资源研究院 | Pipeline supporting device for preventing and treating melting and sinking based on gas heat exchange |
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