Construction method of using triple pipe rotary grouting pile to treat upper soft and lower hard strata
A construction method and hard ground technology, which can be applied to mining equipment, earthwork drilling, tunnels, etc., can solve problems such as the inability to solve the shield attitude, achieve the effects of weakening the bearing capacity, overcoming the inability to press down, and a reasonable construction period
Active Publication Date: 2020-12-22
CCCC SECOND HARBOR ENG +2
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Problems solved by technology
[0004] Another purpose of the present invention is to aim at the upward drift of the shield posture caused by the upper soft and lower hard water-rich formations of silt and silt interbeds, which cannot be solved by conventional methods such as shield tunneling parameter control and grouting materials. problem, propose a stratum treatment method that strengthens the upper stratum and softens the lower stratum
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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0034] It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the reagents and materials, if not otherwise specified, can be obtained from commercial sources; in the description of the present invention, The terms "landscape", "portrait", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have Certain orientations, co...
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The invention discloses a construction method for treating upper soft and lower hard stratum by using a triple-pipe rotary spraying pile. The construction method comprises the following construction steps of S1, determining treatment areas of the upper soft and lower hard stratum, wherein the treatment areas are arranged in a stratum in front of a shield machine at intervals, and the shield machine can be accommodated in the treatment areas when the shield machine is driven to the treatment areas; S2, carrying out triple pipe rotating spraying multi-pile foundation hole construction on the ground above the treatment areas until the rotating spraying construction is completed in the whole treatment areas, wherein each pile foundation hole is divided into an upper layer and a lower layer, asoftening material is rotatably sprayed onto the lower layer, and a weak hardening material is rotatably sprayed onto the upper layer; S3, performing excavating by the shield machine which passes through the treatment areas to complete tunnel construction. The construction method has the characteristics of high construction efficiency and small environmental impact, and can be widely applied to the technical field of shield tunnel construction.
Description
technical field [0001] The invention relates to the technical field of shield tunnel construction. More specifically, the invention relates to a construction method for treating upper soft and lower hard formations by adopting triple pipe rotary grouting piles. Background technique [0002] With the continuous acceleration of my country's economic construction and the continuous development of urban infrastructure, shield construction has become an indispensable part of underground engineering. When the stratum is soft at the top and hard at the bottom, and the groundwater level is high, especially in the silt and silt interbedded strata, the lower part of the shield machine is hard, and the upper part has a weak interlayer, and the groundwater is rich. The upper part of the shield machine has the characteristics of insufficient ground reaction force and high buoyancy of the shield machine. During the excavation process of the shield machine, there will be a floating phenom...
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IPC IPC(8): E21D9/06E21D9/087
CPCE21D9/087E21D9/0678
Inventor 韩晓明李铮何源钟涵许超陈广庆杨擎黄文杰刘华李家洋朱金彭朱宏欣刘杰彭振贺创波
Owner CCCC SECOND HARBOR ENG