Root supporting type cement injection pile construction method
A technology of powder spraying pile and construction method, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of difficult quality assurance and low construction efficiency, and achieve the effect of good quality and high efficiency
Inactive Publication Date: 2012-12-26
中冶(北京)交通科技发展有限公司 +1
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Problems solved by technology
[0002] The existing root-supported powder spraying pile construction method relies on manual construction, which has low construction efficiency and difficult quality assurance
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Embodiment Construction
[0022] The construction method of the root-supported powder spray pile of the present invention uses a mixer to drill the drill pipe to the depth of the soil layer required by the design, and uses compressed air to transport the cement powder or quicklime powder to the special nozzle on the drill bit through the inner hole of the drill pipe. The drill bit rotates and sprays to the surrounding soil, while the drill pipe is lifted at a certain speed. During the process of lifting and stirring, the hole wall is impacted by adjusting the pipe pressure change on the specified section to form a reaming hole; The soil within the range is continuously cut from bottom to top to make it loose, and it is forced to stir in situ, and is squeezed and compacted by blades to form a mixture of soil and admixture, and is stirred and cemented with cement and other powders to harden. After that, a root-supported consolidated pile can be formed.
[0023] like figure 1 Shown, the concrete construc...
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The invention provides a root supporting type cement injection pile construction method with high efficiency and good quality. The root supporting type cement injection pile construction method comprises the following steps of: with the adoption of a stirring machine, using a drilling rod to drill until a soil layer depth required in design; conveying cement powder or calcined lime to a nozzle which is specially formed on a drilling head through an inner hole of the drilling rod by using compressed air; injecting the cement powder or the calcined lime to the peripheral soil body along with the rotation of the drilling head; meanwhile, lifting the drilling rod at a certain speed; in a lifting and stirring process, forming an expansion hole by adjusting pipe pressure variation to impact a hole wall on an assigned cross section; continuously cutting the soil body within a certain range around a blade on the drilling head from bottom to top, so that the soil body is loose; forcedly stirring in position, and densely squeezing through the blade to form a mixture of soil and a blending material; and stirring, mixing and gluing a powder body such as a cement, and thus forming a root supporting type consolidation pile body after curing. With the adoption of the root supporting type cement injection pile construction method provided by the invention, the stability and the mechanical property of the soil can be improved; and the foundation bearing capability and the modulus of deformation can be improved, so that the purpose of reinforcing a foundation is realized.
Description
technical field [0001] The invention relates to a building construction method, in particular to a root-supported powder-sprayed pile construction method. Background technique [0002] The existing root-supported powder spraying pile construction method relies on manual construction, the construction efficiency is low, and the quality is difficult to guarantee. Contents of the invention [0003] The invention provides a high-efficiency and good-quality root-supported powder-sprayed pile construction method. [0004] The root-supported powder spraying pile construction method to realize the purpose of the present invention uses a mixer to drill the drill pipe to the depth of the soil layer required by the design, and uses compressed air to transport cement powder or quicklime powder to the special nozzle on the drill bit through the inner hole of the drill pipe , with the rotation of the drill bit, it sprays to the surrounding soil, and at the same time the drill pipe is l...
Claims
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Inventor 通振远李首才黄修云
Owner 中冶(北京)交通科技发展有限公司