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Underwater compact concrete construction method

A technology of dense concrete and construction methods, applied in the direction of infrastructure engineering, construction, etc., can solve problems such as not being ideal, and achieve the effect of improving the use of labels, reliable construction quality, and reducing the amount and height of concrete laitance

Inactive Publication Date: 2009-01-21
郑雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through testing, even if the construction team does a good job, the problem rate of underwater concrete is between 10% and 30%, which is still not ideal

Method used

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Embodiment Construction

[0015] The invention provides a construction method of underwater dense concrete, the theoretical basis of which is: when concrete is poured underwater, the concrete pours down from the hopper on the top of the conduit to squeeze out the mud in the conduit, and the concrete reaches the exit of the conduit. Squeeze out the mud around the conduit quickly and return the concrete from the vicinity of the conduit to surround and fill the conduit opening, so that the mud near the part of the conduit may be blocked by the concrete that is quickly returned to the conduit. During the continuous pouring of concrete, the conduit reciprocates up and down, which may bring out part of the mud or bring in part of the mud. There is a vibration load during pouring, which will vibrate the upper unstable soil layer. Since the specific gravity of the soil layer is greater than that of the mud, and it has a certain kinetic energy when it is washed down from the upper part, it may also be washed in...

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Abstract

This invention relates to an underwater compact concrete construction method. It contains adopting mud to protect wall, holing and cleaning hole, immersing guide pipe in concrete casting place, casting concrete by guide pipe at the speed matched with the guide pipe lifting speed to keep the guide pipe contact with concrete. It features when only the last guide pipe is left, inserting vibrator into concrete of intermediate or bottom of pile through guide pipe, uniformly vertical vibrating to concrete. Said invention can get better construction quality.

Description

【Technical field】 [0001] The invention relates to a construction method for concrete compaction in underwater construction engineering. 【Background technique】 [0002] Over the years the underground diaphragm wall, punching, bored piles and other underwater concrete compaction, one is compacted by concrete self-extrusion, and the other is compacted by the concrete pipe going up and down several times. [0003] When the grade of concrete used is low, and the detection methods such as ultrasonic and small strain are not very advanced, the compactness of underwater concrete is often confirmed through the concrete core pulling. The accuracy of this detection method is not reliable enough. [0004] Nowadays, the grades of concrete are getting higher and higher, and the detection methods are also improving. Through testing, even if the construction team does a good job, the underwater concrete problem rate is between 10% and 30%, which is still not ideal. 【Content of invention】...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/06
Inventor 郑雄
Owner 郑雄