Anti-frost heave pile foundation support device

A frost-heave-resistant pile foundation support device, comprising:

• a pile foundation cylinder, a pile foundation cylinder top seat, a pile foundation cylinder base, and a frost heave penetration mechanism, wherein
• a top of the pile foundation cylinder is fixedly installed with the pile foundation cylinder top seat, the pile foundation cylinder top seat is configured to connect to a target to be support;
• the pile foundation cylinder base is disposed at a bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are provided on the pile foundation cylinder base for anchoring to a foundation;
• the frost heave penetration mechanism is fixedly installed on a cylindrical wall of the pile foundation cylinder, and the frost heave penetration mechanism includes:
• an L-shaped main pipe, a sliding rod, a horizontal anchor rod, a frost heave force sensing base, a movable soil-retaining device, and a liquid capsule, wherein the L-shaped main pipe includes a horizontal pipe section at top and a vertical pipe section, a mounting block is fixedly disposed inside the vertical pipe section of the L-shaped main pipe, the sliding rod is vertically slidably mounted within the mounting block, a limit plate is fixedly disposed at a middle portion of the sliding rod, a spring is arranged between the limit plate and the mounting block, and a limit protrusion is provided inside a bottom end of the vertical pipe section of the L-shaped main pipe to restrict the limit plate;
• a first piston is disposed at a top end of the sliding rod;
• the horizontal anchor rod is slidably mounted within the horizontal pipe section of the L-shaped main pipe, and a second piston is disposed at a rear end of the horizontal anchor rod;
• the frost heave force sensing base is disposed at a bottom end of the sliding rod, and the movable soil-retaining device is arranged between the frost heave force sensing base and the vertical pipe section of the L-shaped main pipe;
• the liquid capsule is embedded inside the movable soil-retaining device, a liquid channel is provided inside the sliding rod, and a through-hole is centrally disposed in the first piston, the through-hole communicates with the liquid channel of the sliding rod, and the liquid capsule communicates with a bottom side of the liquid channel of the sliding rod via a connecting pipe, such that the liquid capsule communicates with an internal space of the L-shaped main pipe between the first piston and the second piston;
• the liquid capsule, the liquid channel of the sliding rod, and the internal space of the L-shaped main pipe between the first piston and the second piston are filled with hydraulic oil;
• the movable soil-retaining device includes a top fixed cover and N-stage sliding sleeves, Nis greater than or equal to 2, the top fixed cover is fixedly sleeved around a bottom of the vertical pipe section of the L-shaped main pipe, and the N-stage sliding sleeves are sequentially slidably nested, an uppermost sliding sleeve is vertically slidably mounted within the top fixed cover, and a lowermost sliding sleeve is fixedly sleeved on the frost heave force sensing base.