先張法預應力管樁監(jiān)理要點（細則）.doc

一、施工前控制要點
1、 審核承包單位的技術資質證明文件、專業(yè)人員的資格證上崗證。
2、 審核承包單位的施工方案和施工組織設計。
3、 審核施工測量成果報驗表、復查樁位、控制標高等。
4、 檢查進入現場的成品樁，接樁用電焊條等產品質量及出廠技術質量合格證書、品種、類型、規(guī)格（樁徑、管壁厚、樁長強度、質量（外觀應符合設計要求和國家現行標準《先張法預應力砼管樁》GB13476-92的規(guī)定及驗收規(guī)范的規(guī)定。
5、 審查打樁設備的技術性能資料是否滿足工程實際的需要。如選擇柴油打樁錘，應考慮如下問題：
（1） 要保證單樁承載力能達到設計要求（國內經驗，每個型號的柴油錘，其最大成樁能力（單樁極限承載力，約為100倍的型號數（KN），如D45型，最多可打極限承載力4500Kpa）。
（2） 要考慮樁的入土深度即樁的自重大小（憑經驗按錘重與樁重的比例，對一般土質取0.5，若軟土較厚可取 0.4）。
（3） 要根據土質、巖性和布樁狀況來選擇錘型，每根樁的總擊數宜在1500擊以內。
（4） 要保證沖擊壓應力不超過樁身砼極限強度的50%。
First, control points before construction
1, review the technical qualifications of contractors proof of professional qualification certificates work license.
2, review contractor's construction program and construction organization design.
3, audit inspection table construction survey results, review pile and control the elevation so.
4, checking into the site of the finished pile, the pile electric welding techniques such as product quality and factory quality certification, variety, type, specifications (length, diameter, pipe wall thickness, pile length and intensity, quality (appearance should be consistent with design requirements and the state the current standard of "first Prestressed Concrete Pipe" GB13476-92 requirements and acceptance requirements.
5, review the technical performance data piling equipment meets the engineering requirements. If you choose to diesel hammer, shall consider the following questions:
(1) To ensure the bearing capacity to meet the design requirements (domestic experience, each model of diesel hammer, the maximum pile capacity (single pile ultimate bearing capacity, about 100 times the model number (KN), such as the D45 type up to play ultimate capacity 4500Kpa).
(2) to consider the pile at a depth of the pile of dead weight size (rule of thumb by weight of hammer and pile weight ratio of the average soil is 0.5, if the thicker soft desirable 0.4).
(3) according to soil, rock and pile conditions to select hammer type, each pile in the 1500 general strike should hit within a few.
(4) To ensure that the impact of stress does not exceed the ultimate strength of concrete pile 50%.
 

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