Static pressure reinforcing treatment method for pile with unqualified bearing capacity

Abstract

The invention provides a static pressure reinforcing treatment method for a pile with unqualified bearing capacity. The method comprises the following steps of: selecting proper pile static pressure equipment; treating the pile head of the pile with unqualified bearing capacity; performing static pressure pile sinking; performing static repressing and pile sinking; recording and marking; analyzing the bearing capacity unqualified reason of the pile; connecting the pile; and refilling soil and compacting. The method has the advantages that: under the condition that the pile is not repaired, the pile with unqualified bearing capacity is statically pressed according to the designed load by adopting the static pressure equipment, and the pile is necessarily treated after the bearing capacity is stable, so that the bearing capacity of the pile meets the requirement. The method is simple, feasible, intuitive, reliable and definite in judging a construction process, a quality control defect or geological drilling data and actual engineering difference. The treatment construction period is short, and the manufacturing cost of the foundation engineering is saved. The method can be widely applied to reinforcing treatment of the pile with unqualified bearing capacity in a certain range, is convenient to apply and has broad prospect.

Description

technical field [0001] The invention relates to the technology of pile foundation engineering structure, which is a static pressure reinforcement treatment method for piles with unqualified bearing capacity. Background technique [0002] Years of engineering practice have found that after pile foundation construction, when carrying out pile bearing capacity tests or inspections, it is often found that the settlement of the pile exceeds the limit of 40mm for the total settlement of a single pile static load test specified in the code, or the bearing capacity does not meet the requirements. . [0003] The reasons for the unqualified pile foundation bearing capacity generally have the following reasons: [0004] 1. A small number of bearing layers whose pile body quality is insufficient due to jerry-built materials, and the pile length is not enough to meet the design requirements; [0005] 2. There is a major deviation between the geological drilling data and the actual engi...

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Problems solved by technology

[0005] 2. There is a major deviation between the geological drilling data and the actual engineering geological characteristics

[0008] (2) The pile side mud skin is too thick due to the construction technology or the quality control defect of the retaining wall mud, which makes the pile and the soil around the pile slip, and the frictional resistance of the soil around the pile to the pile is weakened or lost

[0009] (3) Broken piles or mud inclusion defects caused by pouring construction technology or quality control defects

[0010] 4. When the prefabricated piles are driven by dynamic or static pressure, the site will be uplifted and the pile foundation will float due to the defects in the construction technology and process control.

These methods have high cost and long construction period, and the redistribution of piles and the change of pile force path after pile repair will cause problems such as uneven foundation stiffness and difficult settlement control.

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