后压浆（Post grouting）.docVIP

后压浆（Post grouting） After grouting.Txt37 sincere wine, the longer the year more mellow thick; sincere is the fireworks, blooms in the high place beautiful flowers; sincere, send to people, there is hand. Bored pile; post grouting; construction technology Article source: Science and technology quality update time: 2011-01-13 This thesis is recommended by Ma Baolin, vice president of science and technology. I hope that our staff will be able to read, study, think and help in the future. Bored pile; post grouting; construction technology Wen Liu Erping Preface Bored pile has many advantages, such as high bearing capacity, easy construction, short construction period, low cost, little equipment, etc. it is widely used in the bridge structure, building construction, water conservancy and hydropower projects and other structural foundation projects. However, the actual bearing capacity of bored pile is lower than that of design because of the existence of bottom sediment and the mud around the pile, and the compressibility of the pore and soil in the formation soil. For the foundation bearing capacity and control requirements of the settlement, only the bored pile length and diameter increase, to achieve the objective of the pile body concrete volume will increase greatly, is not the economy. How to effectively improve the bearing capacity of single pile, shorten the construction period, reduce expenditure and control settlement has become the focus of attention of Engineering personnel. The engineering practice has proved that the grouting technology of bored piles has solved these problems. The following is a brief analysis of the grouting technology of bored piles. Post grouting mechanism Bored grouting pile is a pile and pre buried in the bottom of the pile and grouting pipe grouting device for bored pile and reaches a certain intensity, using pressure grouting device, will have the ability of curing slurry (such as pure cement slurry, cement mortar, cement additive pu