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頂進作業符合規定

2022-05-20

1.應根據土質條件、周圍環境控制要求、頂進方法、各項頂進參數和監控數據、頂管機工作性能等,確定頂進、開挖、出土的作業順序和調整頂進參數。

2.掘進過程中應嚴格量測監控,實施信息化施工,確保開挖掘進工作面的土體穩定和土(泥水)壓力平衡;并控制頂進速度、挖土和出土量,減少土體擾動和地層變形。

3.采用敞口式(手工掘進)頂管機,在允許超挖的穩定土層中正常頂進時,管下部1350范圍內不得超挖;管頂以上超挖量不得大于15mm。

4.管道頂進過程中,應遵循“勤測量、勤糾偏、微糾偏”的原則,控制頂管機前進方向和姿態,并應根據測量結果分析偏差產生的原因和發展趨勢,確定糾偏的措施。

5.開始頂進階段,應嚴格控制頂進的速度和方向;a一最大超挖量;v允許超挖范圍。

6.進人接收工作井前應提前進行頂管機位置和姿態測量,并根據進口位置提前進行調整。

7.在軟土層中頂進混凝土管時,為防止管節飄移,宜將前3一5節管體與頂管機聯成一體。

8.鋼筋混凝土管接口應保證橡膠圈正確就位;鋼管接口焊接完成后,應進行防腐層補口施工,焊接及防腐層檢驗合格后方可頂。 

9.應嚴格控制管道線形,對于柔性接口管道,其相鄰管間轉角不得大于該管材的允許轉角。

來源:CBI建筑網 

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