Impermeable technology for ultra-large-caliber concrete rainwater pipeline joint

Abstract

The invention discloses an impermeable technology for an ultra-large-caliber concrete rainwater pipeline joint. The impermeable technology comprises the following steps that: after concrete pipelinesare independently hoisted section by section, putting the concrete pipelines in a groove to be assembled, laying a pipeline foundation below, putting a rubber sealing rubber gasket in a pipeline tongue-and-groove groove, adopting a chain fall pulling-into method to connect the pipelines, filling the inner and outer gaps of a pipeline joint with asbestos cement, and carrying out first impermeable processing; smearing a belt on the outer wall of the pipeline joint by cement mortar, and putting a steel wire net in the belt so as to carry out second impermeable processing; and before the pipelineis backfilled, coating the pipeline joint and a connection hole of the pipeline and an inspection well with nonwoven geotechnical cloth so as to isolate external soil from the inside of the pipeline,and carrying out third impermeable processing. The impermeable technology has a good effect and high reliability, a water seepage amount of the processed pipeline is far below a water seepage amount allowed by a specification, the impermeable technology has a low cost, is convenient to construct and has a short construction period, and the construction quality of a large-caliber rainwater pipelineis improved.

Description

technical field [0001] The invention belongs to the technical field of drainage, and in particular relates to an anti-seepage process for super-large-caliber concrete rainwater pipe joints. Background technique [0002] In the construction process of construction projects, it is necessary to excavate tunnels and bury concrete pipes for rainwater drainage. Some pipes have a diameter greater than 1500mm. For such super-large-diameter concrete drainage pipes, manufacturers generally can only produce grooved pipes. The groove-and-groove pipe connection has high requirements on the external dimensions of the pipe, especially the grooved socket. Due to the production process problems of the concrete pipe manufacturer, there are errors in the product size, and when it is hoisted, collisions often occur, resulting in damage to the pipe mouth or falling off of the bonding material. Etc., when the concrete pipes are butted, there will be lax butt joints of the sockets and cracks are p...

AI Technical Summary

Problems solved by technology

At present, the storage yards of many projects are built on the sandy soil layer filled with soil. If the drainage pipe leaks, it may lead to sand loss, resulting in loose or even hollow foundation soil, which will cause major hidden dangers to the superstructure.

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