樁工程施工中常見問題原因分析.rar

樁工程施工
打(壓)樁工程施工工序多，工藝要求高，影響樁基質(zhì)量的因素較多，一般有：
　　  1、工程地質(zhì)勘察報告不夠詳盡準(zhǔn)確；
　　  2、設(shè)計的合理取值；
　　  3、施工中的各種原因。
　　在樁基施工中對質(zhì)量問題及隱患的分析與處理，將影響建筑物的結(jié)構(gòu)安全。本文重點介紹打(壓)樁施工中常見質(zhì)量問題的類別、原因分析、常用處理方法。
常見質(zhì)量問題類別及原因分析
    打(壓)樁工程常見質(zhì)量問題有：單樁承載力低于設(shè)計值，樁傾斜過大、斷樁、樁接頭斷離、樁位偏差過大等五大類。造成以上問題的原因：
 1.1單樁承載力低于設(shè)計要求的常見原因有：
      1.1.1樁沉入深度不足；
      1.1.2樁端未進(jìn)入設(shè)計規(guī)定的持力層，但樁深已達(dá)設(shè)計值；
      1.1.3最終貫入度過大；
      1.1.4其他，諸如樁傾斜過大、斷裂等原因?qū)е?br /> Piles
Call (pressure) pile construction process more demanding process, many factors affect the quality of pile foundation generally are:
1, engineering geological investigation report is not exhaustive and accurate;
2, reasonable values of the design;
3, the construction of a variety of reasons.
Pile Foundation Construction in quality problems and hidden dangers on the analysis and processing, will affect the structural safety of buildings. This article focuses on call (pressure) Pile types of common quality problems, cause analysis, commonly used approach.
Common types and causes of quality problems
    Call (pressure) piles quality problems are: lower than the design value of bearing capacity, piles too large, broken piles, joint rupture, excessive deviation Pile five major categories. The reasons for the above problems:
 1.1 lower than the design bearing capacity of the common reasons:
      1.1.1 piles sunk deep enough;
      1.1.2 Design of pile is not required to enter the bearing layer, but deep pile has reached the design value;
      1.1.3 Penetration through the large end;
      1.1.4 Others, such as piles too large, breakage and other causes
 

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