When is the core of pile foundation?

Generally, the coring of pile foundation can be carried out about 20 days after grouting, and can be carried out after reaching the maintenance standard.

Reasons for coring pile foundation: It is stipulated in highway and railway pile foundations that a certain proportion of coring pile foundation is required. If it is not for this reason, core drilling sampling is usually taken to check whether the concrete strength is insufficient, the pile foundation detection is faulty or the static load test is unqualified.

The key points of pile foundation coring are as follows:

1. When testing according to a single component: the number of each component is not less than 3, and the smaller component is not less than 2.

2. Local area detection of parts: determine the position, quantity and depth of core samples according to the conditions of parts.

3. Large foundation or wall: divided into several areas.

4. Pile concrete core sample: 2-3 groups per hole, and each group is processed into 3 specimens.