|
| Engineering | Risk event | Risk source |
|
| A1: pile foundation construction | B1: equipment transportation and installation | C1: drill rack installation tilt |
| C2: falling to the ground during equipment transportation |
| C3: incorrect installation of drill frame |
| C4: unstable construction platform |
| B2: burying of protective cylinders | C5: the height of the protective tube is not enough |
| C6: the seam of the protective tube is not dense |
| C7: insufficient insertion depth of the protective tube |
| C8: the protective tube is inclined and leaking |
| C9: unstable water head in the protection tube |
| B3: drilling holes | C10: unqualified wall protection mud quality |
| C11: bore hole tilt |
| C12: borehole collapse |
| C13: plum blossom holes |
| C14: drilling rig shift |
| C15: reaming or shrinking |
| C16: hole leakage |
| C17: the rig is malfunctioning |
| C18: paste drill, buried drill |
| B4: cleaning hole | C19: collapse when clearing the hole |
| C20: incomplete clearance |
| C21: the thickness of the sediment does not meet requirements |
| C22: the mud thickness does not meet the requirements |
| B5: lifting of steel cages | C23: skeleton deformation |
| C24: the skeleton collides with the hole wall when lifting |
| C25: unqualified welding quality |
| C26: the skeleton elevation does not meet the requirements |
| B6: pouring underwater concrete | C27: catheter inlet |
| C28: collapse during pouring |
| C29: pipe stuck |
| C30: buried pipe |
| C31: broken piles |
| C32: pile body concrete enters mud |
| C33: leakage and deviation of reinforcement skeleton |
|
