Method for treating pile-forming mud-clamping defect of large-diameter filling pile of bridge

Abstract

The invention discloses a method for treating a pile-forming mud-clamping defect of a large-diameter filling pile of a bridge. The method comprises the following steps of: determining the depth of a mud-clamping defect part according to ultrasonic testing or small strain testing results; determining a core area of concrete to be chiseled according to the diameter size a of a pile foundation and by taking a central axis of a reinforcement cage as the center of a circle; keeping the thickness of a protective cover between the core area and the reinforcement cage greater than or equal to 10cm; arranging a corresponding precipitation well around a pile foundation according to known geological conditions; manually chiseling the concrete in the core area until reaching the defect part; cleaning the concrete, mud and the like of the defect part; and pouring the concrete of the core area of a pile body again. By using the method, when the pile-forming mud-clamping defect of the large-diameter filling pile of the bridge is treated, the time and the cost for treating the defect are reduced, the safety of construction personnel is guaranteed, and the processing effect is improved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for treating mud inclusion defects of large-diameter bored piles of bridges. Background technique [0002] In the process of bridge construction, bored cast-in-situ piles are required. During the pouring process, impurities such as mud or mud and cement mortar mixture will separate the poured concrete, causing partial or complete damage to the cross-section of the pile. Severely damaged weighing It is a broken pile, and the slight one is called mud. Broken piles and mud trapped in the pile body are serious quality accidents, if not handled properly, the piles cannot be used. When the depth of the mud inclusion defect is not large from the pile top, the traditional treatment methods generally include the following two types: 1. Grouting treatment, drilling and grouting with a core drilling rig or using the ultrasonic detection hole of the original pile to inject water ...

AI Technical Summary

Problems solved by technology

Broken piles and piles with mud are serious quality accidents, if not handled properly, the piles cannot be used

When the depth of the mud inclusion defect is not large from the pile top, the traditional treatment methods generally include the following two types: 1. Grouting treatment, drilling and grouting with a core drilling rig or using the ultrasonic detection hole of the original pile to inject water into the defect. Mud, due to the difference between the injected cement mortar and the concrete of the pile body and the defect interface cannot be really cleaned, so the treatment effect is generally unsatisfactory; 2. After the steel casing with a sinking diameter exceeding the pile diameter is used as a support, it is manually chiseled off Concrete the pile body above the mud-filled part, and remove the mud-filled welded reinforcement cage and pour the pile body concrete

After the defect treatment is completed, the steel casing is difficult to pull out, so the cost is high. On the other hand, due to the existence of the casing, the contact mode between the pile body and the soil around the pile is changed, which affects the bearing capacity of the pile.

Images