Application method of common cast iron pipe in trenchless construction and pipe locking device
A non-excavation, construction technology, applied in the direction of pipeline laying and maintenance, pipes/pipe joints/fittings, instruments, etc., can solve the problems of high construction price, cumbersome operation and high technical requirements of self-anchored joint ductile iron pipes
Pending Publication Date: 2019-12-03
张冬 +2
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method for using ordinary ductile iron pipes in trenchless construction and a pipe locking device to solve the problems of high construction prices, high technical requirements and cumbersome operations for self-anchor interface ductile iron pipes
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[0068] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0069] see figure 1 , the application method of ordinary ductile iron pipe in non-excavation construction, including:
[0070] The first step: pre-preparation steps, understand the construction ground conditions before construction, design and determine the pipeline route;
[0071] The second step: the guide opening step, using a drilling machine to drill a guide hole underground in the construction site, and the path of the guide hole is along the predetermined pipeline path;
[0072] The third step: the reaming drilling step. After the drill rod of the drilling machine completes the opening of the guide hole, the guide hole is expanded in multiple stages by the p...
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The invention provides an application method of a common nodular cast iron pipe in trenchless construction, which 1, an early-stage preparation step of knowing the stratum condition of a constructionsite before construction, and designing and determining a pipe path; 2, a guide hole opening step of drilling a guide hole in the underground of the construction site by adopting a drilling machine, wherein the path of the guide hole is along a predetermined pipe path; 3, reaming and drilling step of reaming the guide hole through pulling back a reaming device; and 4, a pipe laying detection stepof laying the pipes during the pulling-back process of the reaming device, and carrying out the air tightness detection after laying is completed. According to the present invention, a common nodularcast iron pipe is used for replacing a trenchless special nodular cast iron pipe with a self-anchored connector, the good properties and physical mechanics of the nodular cast iron pipe are fully utilized, and a pipe drawing rail curve of the pipe is scientifically designed, and the innovative application of the common nodular cast iron pipe in horizontal directional trenchless pipe drawing is completed under the condition of the maximum bending deflection angle allowed by the common nodular cast iron pipe.
Description
technical field [0001] The invention relates to a construction method in the technical field of pipeline laying, in particular to a method for using an ordinary ductile iron pipe in trenchless construction and a pipeline locking device. Background technique [0002] The horizontal directional trenchless pipelay technology, also known as HDD technology, is widely used in the construction of water supply and drainage pipeline projects, which is becoming more and more important. The advantages of this construction technology are: it does not affect the normal use of crossing roads, railways, rivers and other buildings; it rarely demolishes the ground, which is conducive to environmental protection; the construction period is short, the operation is safe and fast, and the overall cost is low. Significant benefits. [0003] The non-excavation special nodular cast iron pipeline with self-anchoring interface is well used in crossing projects. Ductile iron has high tensile strengt...
Claims
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Login to View More IPC IPC(8): F16L1/028F16L1/06G08B21/18
CPCF16L1/028F16L1/06G08B21/187
Inventor 张冬江思安
Owner 张冬