Top plate jacking device and jacking construction method configured for V-shaped columns

A top plate jacking device for V-shaped columns, comprising:

• a temporary support pile, wherein the temporary support pile comprises a plurality of pile holes arranged on a construction surface, a cast-in-place bearing platform is provided at a bottom end of each of the plurality of pile holes, a temporary support column is inserted on the cast-in-place bearing platform, a plurality of pillars are fixed at a top of the temporary support column, the temporary support column comprises a plurality of vertically connected column segments, and two adjacent column segments of the plurality of vertically connected column segments are detachably connected vertically with each other with a connecting component;
• a support block that is provided at a top of the plurality of pillars, wherein a top end of the support block abuts against a lower surface of a top plate;
• and
• a hydraulic jack, configured to jack the top plate, wherein the hydraulic jack is provided with a plurality of intervals at the top of the temporary support column;
• wherein the connecting component comprises a plurality of upper abutting seats and a plurality of lower abutting seats, which are arranged evenly at intervals along a circumferential direction of at least one of the plurality of vertically connected column segments, a circular structure formed by the plurality of upper abutting seats and a circular structure formed by the plurality of lower abutting seats are mutually sleeved to limit a horizontal movement of the at least one of the plurality of vertically connected column segments, and a limiting rod group passes through and is provided between the plurality of upper abutting seats and the plurality of lower abutting seats.

A jacking construction method by using a top plate jacking device for V-shaped columns, wherein the top plate jacking device for V-shaped columns comprises:

• a temporary support pile, wherein the temporary support pile comprises a plurality of pile holes arranged on a construction surface, a cast-in-place bearing platform is provided at a bottom end of each of the plurality of pile holes, a temporary support column is inserted on the cast-in-place bearing platform, a plurality of pillars are fixed at a top of the temporary support column, the temporary support column comprises a plurality of vertically connected column segments, and two adjacent column segments of the plurality of vertically connected column segments are detachably connected vertically with each other with a connecting component;
• a support block that is provided at a top of the plurality of pillars, wherein a top end of the support block abuts against a lower surface of a top plate;
• and
• a hydraulic jack, configured to jack the top plate, wherein the hydraulic jack is provided with a plurality of intervals at the top of the temporary support column, and
• wherein the jacking construction method by using the top plate jacking device for V-shaped columns comprises:
• S1. drilling a pile hole at a specified location on the construction surface and pouring the cast-in-place bearing platform at a bottom of the pile hole;
• S2. assembling the plurality of vertically connected column segments, which are prefabricated, on an outside of the pile hole, and connecting the two adjacent column segments of the plurality of vertically connected column segments above and below through the connecting component;
• and after a connection is completed, hanging the temporary support pile vertically into the pile hole, so that a bottom of the temporary support pile is inserted on the cast-in-place bearing platform;
• S3. after placing the support block on the plurality of pillars, mounting the hydraulic jack at the top of the temporary support column, and placing the top plate on a plurality of the support blocks to form a temporary support to the top plate;
• S4. after construction of the V-shaped columns is completed and a strength requirement is met, starting the hydraulic jack to jack the top plate up a certain distance and pulling out the plurality of the support blocks;
• S5. removing the hydraulic jack;
• and
• S6. releasing the connection between the two adjacent column segments, and removing the plurality of vertically connected column segments through a cooperation of a crane and a sling.