A field repair method of jpccp pipe
A repair method and on-site technology, applied in the direction of pipe components, pipes/pipe joints/pipes, mechanical equipment, etc., can solve the problems of high maintenance cost, long repair period, poor safety, etc., to improve safety, reduce repair difficulty, The effect of shortening the construction period
Active Publication Date: 2022-04-26
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Problems solved by technology
[0005] The purpose of the present invention is to provide an on-site repair method for JPCCP pipes to solve the problems of long on-site repair period, high maintenance cost and poor safety of JPCCP pipes in the prior art
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[0027] A kind of field repair method of JPCCP pipe, the steps are as follows:
[0028] Step 1, remove all the inner layer concrete 2 and inner layer steel mesh 3 that are removed from the burst JPCCP pipe section (damaged whole pipe body);
[0029] Step 2: Cut the steel cylinder at the inner convex part, discharge the stored pressurized water 5 that enters between the steel cylinder and the tube core along the external water seepage channel 4, and then cut off the entire steel cylinder. The state after cutting is as follows figure 1 shown;
[0030] Step 3, transport the lined steel cylinder 6 to the position of the JPCCP pipe joint that needs to be repaired, and stretch it out so that it fits the inner wall of the outer pipe body 15; wherein, the lined steel cylinder 6 is pre-opened with a grease injection hole 7 And the vent hole 8, the grease injection hole 7 is located at the bottom of the lined steel cylinder 6, and the vent hole 8 is located at the top of the lined steel...
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The invention provides an on-site repair method for JPCCP pipes. The steps include: removing all the inner layer concrete of the damaged entire section of the pipe body; Cut off the entire section of the tube, check the integrity and tightness of the tube body; find out the seepage channel and block it; after the plugging is completed, install a steel lining cylinder in the tube body, and weld the two ends of the steel lining cylinder to the socket; After the welding is completed, pour waterproof material between the steel lining cylinder and the outer pipe body through the grease injection hole on the steel lining cylinder until the waterproof material flows out from the grease injection hole, and then seal the steel lining cylinder with a plug. After the pressure is stabilized, remove the grease injection equipment and seal the grease injection hole; lay steel mesh on the inner wall of the steel-lined cylinder, line the fine stone concrete layer, and perform maintenance after the initial setting. The invention can not only quickly complete the repair, reduce the difficulty of repair, greatly shorten the construction period, but also greatly reduce the repair / construction cost, and can also improve the safety in the construction process.
Description
technical field [0001] The invention belongs to the technical field of pipeline maintenance, and in particular relates to an on-site repair method for JPCCP pipes. Background technique [0002] Prestressed steel cylinder concrete pipe jacking (referred to as JPCCP pipe) is a composite pipe produced by comprehensively utilizing the tensile and impermeability properties of steel and the compressive performance of concrete. It is produced in the prestressed steel cylinder concrete pipe (PCCP ) based on the research and development of a large-diameter new pipe, usually in the non-excavation large-diameter pressure water delivery and pressure sewage projects. The prestressed steel cylinder concrete pipe jacking is to use a steel cylinder with a steel socket after the hydraulic pressure test, pour a certain thickness of concrete inside and outside the cylinder as the tube core, and wind a certain density of prestressed steel wires outside the tube core according to the working con...
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IPC IPC(8): F16L55/164
CPCF16L55/164
Inventor 杨庆辉赵彦春白继军于世坤叶宗伟王红武王文俊赵元涛李举才
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD