A Positioning Grouting Method for Large Tonnage Bearings

Abstract

The invention provides a large-tonnage support locating grouting method. The large-tonnage support locating grouting method comprises the following steps of S1, fixedly connecting a plurality of steelmold pieces to enclose a grouting space of the large-tonnage support locating grouting, wherein the lower ends of the steel mold pieces are placed within a bearing pad stone; and S2, grouting the grouting space from bottom to top through a grouting passage formed in the bearing pad stone. According to the large-tonnage support locating grouting method, as the grouting space of the large-tonnage support locating grouting is grouted by using the mode from bottom to the top, the grouting time is reduced, the bubble eliminating efficiency is enhanced, bubbles, sinking, pitted surface, edge cornerslump and mortar leakage ratio on the surface of a mortar bed of a large-tonnage support can be reduced in a maximized manner, a problem of uncompacted grouting in the middle of the mortar bed of thelarge-tonnage support is reduced or avoided to prevent damages of the large-tonnage support, and meanwhile, the appearance quality of the mortar bed of the large-tonnage support is improved.

Description

technical field [0001] The invention relates to the technical field of bridge building engineering construction, and more particularly, to a positioning grouting method for large-tonnage bearings. Background technique [0002] The traditional support grouting measures mainly rely on wooden formwork and gravity grouting from top to bottom. With the development of bridge technology, more and more bridges use large tonnage bearings. Statistics found that some large-tonnage bearings have many problems after using traditional bearing grouting measures: after grouting, the proportion of quality problems such as air bubbles, subsidence, pitting, edge collapse and grout leakage on the surface of the bearing mortar cushion increased, among which The main cause of the poor appearance quality of the bearing mortar cushion is air bubbles, which account for the largest proportion, accounting for 50% of the total appearance defects. [0003] If traditional support grouting measures are ...

AI Technical Summary

Problems solved by technology

Statistics found that some large-tonnage bearings have many problems after using traditional bearing grouting measures: after grouting, the proportion of quality problems such as air bubbles, subsidence, pitting, edge collapse and grout leakage on the surface of the bearing mortar cushion increased, among which The main cause of the poor appearance quality of the bearing mortar cushion is air bubbles, which account for the largest proportion, accounting for 50% of the total appearance defects

[0003] If traditional support grouting measures are adopted for large-tonnage support grouting, the density of the mortar cushion between the large-tonnage support and the support pad cannot be guaranteed after grouting, which will greatly increase the disease risk ratio of large-tonnage support and reduce the risk of large-tonnage support. The safety and functionality of the seat, the appearance quality of the mortar cushion cannot be guaranteed to meet the design requirements

This also greatly increases the construction cost of the entire large-tonnage bearing system and the large-tonnage bearing system, reducing social and economic benefits.

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