CN-224227837-U - Assembled anti-freezing pile pulling foundation for overhead transmission line in permafrost region

CN224227837UCN 224227837 UCN224227837 UCN 224227837UCN-224227837-U

Abstract

The utility model relates to the field of pile foundation engineering in permafrost areas, in particular to an assembled anti-freezing pile pulling foundation for an overhead transmission line in the permafrost areas, which comprises a strip-shaped base, a forward conical upright post, a heat insulation board and a bearing platform which are sequentially arranged from bottom to top, the upper portion of the forward conical upright post is a hollow round platform, the lower portion of the forward conical upright post is a hollow cylinder, the top end of the forward conical upright post is sequentially connected with a heat insulation plate and a bearing platform by bolts, the pile bottom is connected with a strip-shaped base by flanges, the bearing platform and the strip-shaped base are of prefabricated assembly structures, and the heat insulation plate is an asbestos plate. The pile foundation is a hollow body, the weight is light, the upright column of the right cone can fundamentally reduce the tangential frost heave force, thereby reducing the upward pulling displacement of the pile body, effectively preventing the radiation heat from being transferred to the soil around the pile in warm seasons, improving the upper limit of the frost soil of the soil around the pile, enhancing the stability of the soil around the pile, and meanwhile, the components can be flexibly disassembled and assembled, so that the construction is rapid and convenient, and the pile foundation is suitable for popularization and use.

Inventors

YAN CHANG
HU QILONG
CHENG XIAONI
ZHU QIAO
LI QI
YU JINGWEN
YI XIAOFAN

Assignees

武汉城建建设工程有限公司

Dates

Publication Date: 20260512
Application Date: 20250606

Claims (5)

1. The assembled frost-resistant pile pulling foundation for the overhead transmission line in the permafrost region is characterized by comprising a prefabricated strip-shaped bottom plate (8), a forward conical upright post and a bearing platform (2) which are sequentially arranged from bottom to top, wherein the upper part of the forward conical upright post is a hollow round table (4), the lower part of the forward conical upright post is a hollow round table (6), the hollow round table (4) and the hollow round table (6) are integrally formed, the hollow round table (4) is arranged in a movable layer (9), and the hollow round table (6) is arranged in a permafrost layer (10).
2. The permafrost region overhead transmission line assembled anti-freeze pile pulling foundation according to claim 1, wherein a heat insulation plate (3) is arranged between the bottom of the bearing platform (2) and the top of the hollow round platform (4).
3. The permafrost region overhead transmission line assembled anti-freeze pile pulling foundation according to claim 1, wherein the bottom of the bearing platform (2) is fixedly connected with the top of the hollow round platform (4) through bolts.
4. The permafrost region overhead transmission line assembled anti-freeze pile pulling foundation according to claim 1, wherein the bottom surface of the hollow cylinder (6) is connected with a prefabricated strip-shaped bottom plate (8) through a flange (7).
5. The permafrost region overhead transmission line assembled anti-freeze pile pulling foundation according to claim 1, wherein the bearing platform (2), the forward conical upright post and the prefabricated strip-shaped bottom plate (8) are all assembled structures.

Description

Assembled anti-freezing pile pulling foundation for overhead transmission line in permafrost region Technical Field The utility model relates to the field of pile foundation engineering in permafrost areas, in particular to an assembled anti-freezing pile pulling foundation for overhead transmission lines in permafrost areas. Background The pile foundation loading form of the overhead transmission line is different from other structures, the pile foundation loading is mainly carried out, and the potential frozen pulling force existing in the permafrost foundation definitely increases the damage risk of pile foundation pulling. At present, a direct-buried straight pile foundation or a bored pile foundation is often adopted for the electric power tower foundation in the permafrost region. The direct-buried straight pile foundation has poor frost resistance and is often damaged by frost, the traditional bored pile foundation has longer construction period, and has large construction difficulty in the plateau frozen soil area, and the construction can cause certain damage to the ecological environment, thereby aggravating the degradation of the plateau frozen soil. Disclosure of utility model The utility model aims to provide an assembled frost-resistant pile pulling foundation for an overhead transmission line in a permafrost region, which has the characteristics of high construction speed, low comprehensive cost, good frost-resistant performance, small disturbance to a frozen soil stratum and the like, and can reduce pile side shear stress and pile foundation frost-pulling displacement in the permafrost region. The utility model aims at realizing the purposes, and adopts the technical scheme that the assembled anti-freezing pile pulling foundation of the permafrost region overhead transmission line comprises a prefabricated strip-shaped bottom plate, a forward conical upright post and a bearing platform which are sequentially arranged from bottom to top, wherein the upper part of the forward conical upright post is a hollow round platform, the lower part of the forward conical upright post is a hollow cylinder, and the hollow round platform and the hollow cylinder are integrally formed; The hollow round platform is arranged in the movable layer, and the hollow cylinder is arranged in the permafrost layer and is used for reducing the shear stress acting on the side of the pile when the soil body of the movable layer is frost-expanded through the hollow round platform. Preferably, a heat insulation plate is arranged between the bottom of the bearing platform and the top of the hollow round platform. Optionally, the bottom of the bearing platform is fixedly connected with the top of the hollow round platform through bolts. Optionally, the bottom surface of the hollow cylinder is connected with the prefabricated strip-shaped bottom plate through a flange. Preferably, the bearing platform, the forward conical upright post and the prefabricated strip-shaped bottom plate are all of an assembled structure. Compared with the prior art, the utility model has the following advantages: 1. all components are prefabricated, the quality of the assembled components can be effectively guaranteed, and the construction is fast and convenient. 2. The upper part of the conical upright post adopts a hollow round table, and the lower part of the conical upright post adopts a hollow cylinder design, so that the side shear stress of the pile in the movable layer is reduced, and the stability of the pile foundation is improved. 3. And a heat insulation board is arranged between the top of the forward conical upright post and the bearing platform, so that heat conduction downwards is effectively reduced, the upper limit of frozen soil is improved, and the heat insulation board adopts an asbestos board, so that the cost is low. Drawings Fig. 1 is a schematic structural view of the present utility model. FIG. 2 is a force exploded view of a tapered pile. Reference numerals illustrate: 1-a bolt, 2-a bearing platform, 3-a heat insulation plate, 4-a hollow round platform and 5-the upper limit of frozen soil, 6-hollow cylinder, 7-flange, 8-prefabricated bar bottom plate, 9-movable layer, 10-permanent frozen layer. Detailed Description The utility model will be further described in detail with reference to the drawings and the specific examples. The utility model provides an assembled frost resistant pile pulling foundation of permafrost region overhead transmission line, includes prefabricated bar bottom plate 8, positive toper stand and cushion cap 2 that set gradually from bottom to top, and wherein, the upper portion of positive toper stand is hollow round platform 4, and in the active layer 9 was arranged in to hollow round platform 4, positive toper stand lower part was hollow cylinder 6, and hollow cylinder 6 was arranged in forever in freeze layer 10, and hollow round platform 4 and hollow cylinder 6 are integrated into one piece. On