Pore-forming construction method used when rotary digging cast-in-place pile meets large-particle-size pebble and pebble holding hopper drill
The invention discloses a pore-forming construction method used when a rotary digging cast-in-place pile meets a large-particle-size pebble. The pore-forming construction method comprises the following steps: 1) feeding samples and locating; 2) taking particle samples through drilling, and judging t...
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Main Authors | , |
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Format | Patent |
Language | Chinese English |
Published |
24.11.2017
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Subjects | |
Online Access | Get full text |
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Summary: | The invention discloses a pore-forming construction method used when a rotary digging cast-in-place pile meets a large-particle-size pebble. The pore-forming construction method comprises the following steps: 1) feeding samples and locating; 2) taking particle samples through drilling, and judging the quality and the geologic structure of a stratum soil-rock mass according to the taken particle samples; 3) conducting rotary digging to a pebble layer by a rotary hopper drill until not performing rotary digging and going down; 4) replacing a rotary hopper drill with a pebble holding hopper drill, and holding the pebble out from the ground through drilling; 5) after the pebble is held out, replacing with a conventional rotary hopper drill again for rotary digging; and 6) circularly conducting the step 3 to the step 5 till the pebble layer is drilled out. The invention further discloses the pebble holding hopper drill which comprises a base, a square head, a drill bucket, water outlets, oblique strip teeth and dr |
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Bibliography: | Application Number: CN20171646230 |