Long-stroke multi-jacking supporting cushion jacking method

Abstract

The invention discloses a long-stroke multi-jacking supporting cushion jacking method, which comprises the following steps: 1) preparing a jacked object cushion block and a jack cushion block, respectively putting a jacked object and a jack onto the jacked object cushion block and the jack cushion block, and connecting the push rod of the jack with the jacked object; 2) jacking the jacked object by jacking the push rod of the jack; 3) filling the jacked object cushion block into a gap below the jacked object which is jacked up, carrying out oil return shrinkage jacking to the jack, and causing the jack to be hung on the bottom of the jacked object; 4) filing the jack cushion block in the gap on the bottom of the jack, removing the jacking force of the jack, and causing a lifting sleeve to stably fall onto the filled jack cushion block; 5) entering the jacking preset amount state of the next jacking period, repeating the process again and again, and fishing jacking until the jacked object is jacked to a preset position. The long-stroke multi-jacking supporting cushion jacking method has the characteristics of convenient operation mode, time and labor saving, high operation efficiency and low construction risk and can be widely applied to the jacking operation of the civil engineering construction.

Description

technical field [0001] The invention relates to jacking operations in civil engineering construction, in particular to a jacking method for long-stroke inverted jacking pads. Background technique [0002] see Figure 1 to Figure 2 In construction, it is often necessary to use the jack 4 to lift a heavy object 1 by several tens of centimeters. In order to prevent the ejector rod 2 of the jack 4 from causing damage to the bottom surface of the object 1, generally between the ejector rod 2 and the object to be pushed A backing plate 6 is placed between the bottom surfaces of the 1. Because the maximum jacking stroke of jack 4 generally only has 15 centimeters, is far less than target distance, at this moment will divide several times and gradually jack up and put in place. The existing way is to select the jacking amount (calculated by 15 centimeters) at each time with reference to the maximum jacking stroke of the jack 4 used, and first jack up 15 centimeters, and support the...

AI Technical Summary

Problems solved by technology

[0003] It can be seen from this that, for a large tonnage object 1, since the weight of the jack 4 also increases thereupon, it is time-consuming and laborious to replace the jack 4 by manpower, and in many cases the operating space provided by this type of engineering operation It is very narrow and cannot use large-scale handling equipment, which makes the construction operation very inconvenient, which not only seriously affects the smooth progress of the follow-up procedures, delays the progress of the project, but also increases the construction risk

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