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| Research on the Ten Key Points of Construction Quality of Concrete Cast-in-place Pile |
| CHANG Juyou1, LIU Dewei1, ZHONG Zaihang1, CHANG Yaoxi1, HAO Yushun2, HOU Long3, MA Hang3 |
1. China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China;
2. China Railway No.8 Engineering Group Co. Ltd, Chengdu, Sichuan 610032, China;
3. China Railway No.4 Engineering Group Co. Ltd, Hefei, Anhui 230000, China |
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Abstract Research purposes: For the construction of concrete cast-in-place pile of railway bridge and culvert, because of the collapse of local critical soft soil layer and the inaccurate prediction of the factors affecting the construction quality, the construction quality of part of cast-in-place pile is not up to standard, and the waste of rework treatment is serious, effective preventive measures must be taken to ensure the construction quality of cast-in-place pile, and ten key points of effective methods are put forward and studied.
Research conclusions:(1) The ten key points include: the entry of raw materials should be regulated; the mixture ratio should be tested; concrete pouring is necessary to control the slump; the soft ground should be based on the control of pile expanding; the location of pipe should be based on the control of buried depth; the sediment thickness should be controlled at the bottom of the pile; the concrete continuity should be controlled in the pile; the compressive strength should be controlled at the top of the pile; the integrity test is based on optimal treatment; the whole process is based on the coordination. (2) The implementation of the ten key points makes the cast-in-place piles all up to the standard and avoids the rework waste. (3) The research results can provide reference for improving the construction quality of the cast-in-place concrete pile in the fields of railway and highway.
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Received: 26 September 2022
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2023, Vol. 40 
