US 12,698,709 B2Granted

Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls

OwnerChi Zhang, Xinyu Yang +7inventors

InventorsChi Zhang, Xinyu Yang, Weihao Yang, Jiahui Huang, Zhijiang Yang, Tao Han, Tao Zhang, Tingting Luo, Yu Zhang

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Abstract

The invention discloses a slipform blade foot and method for applying pre-compression strain to cast-in-place concrete of a shaft wall. The slipform blade foot is an annular structure, comprising a plurality of blade foot block structures connected end to end, each blade foot block structure comprising: a blade foot block body, a vertical displacement generating device, a displacement sensor and a limit plate, the vertical displacement generating device is arranged between a lower plate and an arc plate, and is used to drive the displacement of the arc plate in a vertical direction; the displacement sensor is arranged on the telescopic end of the vertical displacement generating device; the limit plate is an I-shaped structure, and is used to limit the maximum displacement distance of the arc plate. The invention is suitable for a shaft wall constructed by a top-down, short-digging and short-laying process, and can quickly and accurately apply pre-compression strain to the cast-in-place concrete of the shaft wall by applying upward displacement to the arc plate to extrude the cast-in-place concrete, thereby improving the compactness of the cast-in-place concrete in the shaft wall section and the joint cast-in-place concrete, and significantly improving the overall water-sealing performance of the shaft wall.

Claims7

Dependent claims

A slipform blade foot having an annular structure, for applying prestressing strain to cast-in-place concrete of a shaft wall, comprising a plurality of blade foot block structures connected end to end, wherein each blade foot block structure comprises:

a blade foot block body, comprising:
a lower plate (2);
an outer plate (3), vertically arranged at a first end of the lower plate (2);
a blade foot block connecting plate (5), wherein a first end of the connecting plate (5) is connected to a second end of the lower plate (2);
an upper plate (4), wherein a first end of the upper plate (5) is connected to a second end of the connecting plate (5), and wherein the upper plate (4) comprises a hole groove;
an arc plate (1), wherein one end of the arc plate (1) slidably engages the outer plate (3) via a lower edge structure, and a second end of the arc plate (1) overlaps with the upper plate (4);
a vertical displacement generating device (6), disposed between the lower plate (2) and the arc plate (1), wherein:
a fixed end of the device (6) is fixedly connected to the lower plate (2);
a telescopic end of the device (6) is fixedly connected to the arc plate (1);
the device (6) is configured to drive the vertical displacement of the arc plate (1);
a displacement sensor (7) arranged on the telescopic end of the vertical displacement generating device (6), which configured to monitor the vertical displacement in real time;
a limit plate (8) having an I-shaped structure with two horizontal surfaces and one vertical surface, wherein:
a first horizontal surface of the limit plate (8) is fixedly connected to the arc plate (1);
the vertical surface passes through the hole groove of the upper plate (4) and is slidably connected to the hole groove;
a second horizontal surface is located below the upper plate (4), and wherein both of the horizontal surfaces are larger than the hole groove.

12 more elements

Dependencies are inferred from the claim text.