Steel pipe column expansion-induced cracking failure internal pressure multi-point control automatic alarm system

A pressure control and multi-point control technology, applied in the direction of measuring fluid pressure, force/torque/power measuring instrument, measuring device, etc., can solve the problem of high construction cost and achieve the effect of improving efficiency and saving cost

Active Publication Date: 2018-02-23
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction cost increased by just taking this measure is as high as more than 10 million yuan

Method used

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  • Steel pipe column expansion-induced cracking failure internal pressure multi-point control automatic alarm system
  • Steel pipe column expansion-induced cracking failure internal pressure multi-point control automatic alarm system
  • Steel pipe column expansion-induced cracking failure internal pressure multi-point control automatic alarm system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The system consists of three parts, namely the steel pipe column in the deep foundation pit support system, the alarm device and the pressure switch installed on the steel pipe column.

[0041] Such as image 3 Shown:

[0042] The upper end of the steel pipe column 20 provides a fulcrum for the horizontal and horizontal concrete support 19 on the top, and the lower end is embedded in the foundation 24, and is welded together with the reinforcement cage inside the concrete pile.

[0043] Pressure control switches are installed on the top, middle and bottom of the steel pipe column. The position of each switch should first consider the length of the steel pipe column and the location of the horizontal steel support arrangement. Refer to the table below for the installation position:

[0044] Table 1 The installation position of the pressure switch of this alarm system

[0045]

[0046] The above-mentioned pressure control switch is connected with the alarm, and the ...

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PUM

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Abstract

The present invention relates to an automatic alarm system, in particular, a steel pipe column expansion-induced cracking failure internal pressure multi-point control automatic alarm system. The invention aims to prevent a condition that a steel pipe column losses a bearing capacity due to expansion-induced cracking. When the steel pipe column is adopted as the main component of a tunnel or deepfoundation pit supporting system, and since the steel pipe column contains soil and mud inside, and the steel pipe column would crack due to cold and expansion under the low temperature of the winterof the northern region of China, and the automatic alarm system is particular designed according to the above condition. A set of alarm system is arranged along the length direction of the steel pipecolumn, the alarm system can sense the internal pressure of the steel pipe column, can emit alarm sound when the pressure achieves a certain limit value, and can perform color lamp display to realizean automatic real-time alarm function. Therefore, corresponding plan measures are taken to avoid engineering accidents caused by the freezing of the steel pipe column which is further caused by the sudden change of the internal pressure of the steel pipe column.

Description

technical field [0001] The invention relates to an automatic alarm system developed to prevent steel pipe columns from swelling and cracking and losing their bearing capacity, especially when steel pipe columns are used as the main component of the supporting structure system in tunnels or deep foundation pit support systems. The internal pressure control automatic alarm system of the steel pipe developed for the cracking of soil containing soil due to frost heave. Background technique [0002] Steel pipe columns are an important part of a common support structure system for urban open-cut or half-cover construction tunnels and large bridge piers or deep foundation pits of high-rise buildings. The composition of this support structure system usually includes: enclosure row piles poured by drilling before excavation of the foundation pit, steel pipe columns (or lattice columns) providing vertical support, horizontal steel pipe horizontal supports, and the enclosure The top o...

Claims

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Application Information

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IPC IPC(8): G01L19/12G01L5/00E02D17/04
CPCE02D17/04G01L5/00G01L19/12
Inventor 金生吉陈华杨崇宪闫常山赵凌宇
Owner SHENYANG POLYTECHNIC UNIV
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