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Extra-high-voltage convertor station rock block backfilling strong-ramming foundation treatment method
An extra-high-voltage convertor station rock block backfilling strong-ramming foundation treatment method comprises the steps that 1, a foundation treatment scheme is determined; 2, trial ramming is performed; 3, strong ramming is performed, namely one-layer in-place backfilling is adopted within a 2.5 m backfilling thickness range, 2000 kN.m main ramming+1000 kN.m full ramming are adopted, wherein the number of the main ramming times is 10, and the average ramming volume of final two-time rams is not greater than 50 cm; two-layer backfilling is adopted for the backfilling thickness of more than 2.5 m, 6000 kN.m main ramming+ 2000 Kn.m full ramming and 2000 kN.m main ramming+1000 kN.m full ramming are adopted according to different backfilling thicknesses, wherein the numbers of the main ramming times are 13 and 10 respectively, and the average ramming volume of final two-time rams is not greater than 50 cm; The maximum particle size of backfilling rock blocks adopted in the method is not more than 30cm. The layered backfilling thickness is not more than 50 cm, a road roller is firstly adopted to conduct rolling compaction on each layer, then strong ramming is performed after the designed elevation is reached through backfilling, and the foundation treatment reliability is improved. A filled foundation is treated and reinforced only through strong ramming and serves as a basic supporting layer for all building of a whole station, other treatments are not performed, a construction period is shortened, and the construction cost of a project is greatly reduced.
Extra-high-voltage convertor station rock block backfilling strong-ramming foundation treatment method
An extra-high-voltage convertor station rock block backfilling strong-ramming foundation treatment method comprises the steps that 1, a foundation treatment scheme is determined; 2, trial ramming is performed; 3, strong ramming is performed, namely one-layer in-place backfilling is adopted within a 2.5 m backfilling thickness range, 2000 kN.m main ramming+1000 kN.m full ramming are adopted, wherein the number of the main ramming times is 10, and the average ramming volume of final two-time rams is not greater than 50 cm; two-layer backfilling is adopted for the backfilling thickness of more than 2.5 m, 6000 kN.m main ramming+ 2000 Kn.m full ramming and 2000 kN.m main ramming+1000 kN.m full ramming are adopted according to different backfilling thicknesses, wherein the numbers of the main ramming times are 13 and 10 respectively, and the average ramming volume of final two-time rams is not greater than 50 cm; The maximum particle size of backfilling rock blocks adopted in the method is not more than 30cm. The layered backfilling thickness is not more than 50 cm, a road roller is firstly adopted to conduct rolling compaction on each layer, then strong ramming is performed after the designed elevation is reached through backfilling, and the foundation treatment reliability is improved. A filled foundation is treated and reinforced only through strong ramming and serves as a basic supporting layer for all building of a whole station, other treatments are not performed, a construction period is shortened, and the construction cost of a project is greatly reduced.
Extra-high-voltage convertor station rock block backfilling strong-ramming foundation treatment method
ZHENG HUOQIU (author) / LEI XIAOBIAO (author) / WEN QUAN (author)
2015-09-23
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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