Title:
UHPC-NC COMPOSITE PILE FOUNDATION AND CONSTRUCTION METHOD THEREFOR FOR POWER TRANSMISSION TOWER IN SALINE-ALKALI AREA
Document Type and Number:
WIPO Patent Application WO/2021/082769
Kind Code:
A1
Abstract:
The present invention relates to the field of power transmission line tower foundations. Disclosed are an ultra-high performance reactive powder concrete (UHPC)-normal concrete (NC) composite pile foundation and a pile forming method therefor, which are applicable to strongly corrosive salinized soil areas or geological condition areas with obvious dry-wet and freeze-thaw alternate action. The foundation comprises: a foundation main pile penetrating through a soil layer to a supporting layer, and a prefabricated UHPC outer sleeve, wherein the portion, below the bottom of the UHPC outer sleeve, of the foundation main pile is of a columnar structure, and the outer side surface of a section in contact with the sleeve changes along with the shape of the inner wall of the sleeve. Compared with the conventional anti-corrosion measures, under the same geological conditions and the same external load effect and on the basis of excellent material performance of UHPC, the UHPC-NC composite pile foundation has the advantages that the corrosion resistance of the power transmission tower foundation in a saline-alkali area is greatly improved, and the initial construction cost and the whole-life maintenance cost are greatly reduced. The prefabricated sleeve is combined with a dry operation method of bored (digged) cast-in-place pile construction method, so as to ensure that the quality of a pile body is good, residents are not disturbed during construction, and environmental hazards are small.
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Inventors:
WANG SHIJUN (CN)
SONG JUN (CN)
YANG DEZHOU (CN)
YU LIN (CN)
SONG JUN (CN)
YANG DEZHOU (CN)
YU LIN (CN)
Application Number:
PCT/CN2020/115198
Publication Date:
May 06, 2021
Filing Date:
September 15, 2020
Export Citation:
Assignee:
STATE GRID CORP CHINA (CN)
STATE GRID GANSU ELECTRIC POWER CORP (CN)
CONSTRUCTION BRANCH OF STATE GRID GANSU ELECTRIC POWER CORP (CN)
ECONOMY AND TECH RESEARCH INSTITUTE GANSU ELECTRIC POWER CORPORATION STATE GRID (CN)
STATE GRID GANSU ELECTRIC POWER CORP (CN)
CONSTRUCTION BRANCH OF STATE GRID GANSU ELECTRIC POWER CORP (CN)
ECONOMY AND TECH RESEARCH INSTITUTE GANSU ELECTRIC POWER CORPORATION STATE GRID (CN)
International Classes:
E02D5/36; E02D5/66; E02D27/42
Foreign References:
| CN110924424A | 2020-03-27 | |||
| CN109881662A | 2019-06-14 | |||
| CN109853605A | 2019-06-07 | |||
| CN101343871A | 2009-01-14 | |||
| CN106284307A | 2017-01-04 | |||
| CA3029277A1 | 2019-07-08 | |||
| EP0010037A1 | 1980-04-16 |
Attorney, Agent or Firm:
QINGDAO ZHIDILINGCHUANG PATENT AGENCY CO., LTD (CN)
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