Construction method of concrete pouring system for tunnel secondary lining

Abstract

The invention relates to a construction method of a tunnel two-lining concrete pouring system, which comprises the following steps of: carrying out full-coverage scanning on a primary cross section byusing a three-dimensional laser scanner, calculating an estimated pouring two-liner concrete square quantity, and transmitting the estimated pouring two-liner concrete square quantity to an electriccabinet (40); installing a strip-shaped pressure sensing gasket (33) and a transparent pipe (30); installing a pressure sensing chip (9), a pressure sensing piece (32) and a temperature sensor (5); arranging a high-frequency pneumatic vibrator (12) and an automatic insertion type vibrator (18), and installing a flow sensor (1); stopping jacking when the pressure sensing value of the pressure sensing chip (9) is greater than the pressure resistance value of the upper plate two-lining concrete, installing a comprehensive pipe (3); pressing air, monitoring the square quantity of the concrete; carrying out pneumatic vibrating; carrying out insertion vibrating; judging that the concrete is full, and finishing pouring the concrete. The automation of the pouring of the two-lining concrete is achieved.

Description

technical field [0001] The invention relates to a concrete pouring system, and more specifically relates to a construction method for a tunnel secondary lining concrete pouring system, which belongs to the technical field of tunnel lining construction. Background technique [0002] At present, with the rapid development of high-speed rail in my country, there are more and more tunnels; with the continuous improvement of tunnel lining quality and standardized construction requirements, the quality requirements of tunnel lining concrete are getting higher and higher. [0003] In the traditional tunnel lining process, the steel formwork of the second lining trolley is directly overlapped with the concrete of the upper slab before concrete pouring, and there is no relevant top pressure control, so it is easy to crack the lapped concrete and cause the construction joints to fall off; during the pouring process, The ground pump pumps the concrete to each feed port of the second li...

AI Technical Summary

Problems solved by technology

[0003] In the traditional tunnel lining process, the steel formwork of the second lining trolley directly overlaps the concrete of the upper slab before concrete pouring, and there is no relevant top pressure control, so it is easy to crack the lapping concrete and cause the construction joints to fall off; during the pouring process, The ground pump pumps the concrete to each feed port of the second lining trolley, and vibrates with a hand-held vibrator at the feed port, and uses an electric attached vibrator to vibrate when pouring the vault. However, due to The second lining vault has dense steel bars, and the vault concrete cannot be vibrated manually, and the frequency of the vibrator is insufficient and the vibration radius is small, so it is impossible to ensure whether the vault concrete is dense and full, which will easily lead to voids in the tunnel lining vault concrete and insufficient concrete strength Quality problems; the process of the second lining arch top punching process, because the concrete construction is invisible, the traditional method depends on whether there is any grout leakage in the end formwork, and it is impossible to accurately judge whether the second lining arch concrete is filled, which may easily lead to the hollowing out of the tunnel lining arch concrete ; The quality of the tunnel lining vault caused a great safety risk to the later train operation, so the traditional tunnel lining process can no longer meet the construction needs

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