Shanghai Kaiyan testing company specializes in automatic monitoring of subway, tunnel, slope, subgrade, foundation pit, bridge health monitoring, etc
.
it is a technology enterprise integrating monitoring, instrument research and development, production and sales
.
Our company cooperates with China Railway No.3 engineering group, China Railway No.11 engineering group, China Railway Tunnel Engineering Group, China Railway No.17 engineering group, Tongji University, water conservancy research institute, Zhejiang University, etc Research institutes maintain perennial strategic cooperation
.
Contact person: Yegong 13046632883 working principle and key points of inclinometer (1) installation of inclinometer tube (see Figure 1)
.
There are two kinds of inclinometer pipes: round and square
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In China, round pipes are mostly used, with diameters of 50 mm and 70 mm
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Each section is generally 2 m long
.
They are made of steel, aluminum alloy and plastic
.
The most commonly used one is PVC plastic pipe
.
Before the reinforcement cage is hoisted, the inclinometer pipe is lengthened to the designed length, bound on the reinforcement, and put into the groove (pile hole) together with the reinforcement cage
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The bottom and top of the inclinometer pipe shall be sealed with covers to prevent mortar, mud and sundries from entering the hole
.
(2) working principle of inclinometer
.
According to its working principle, inclinometer has servo acceleration type, resistance strain gauge type, differential capacitance type, steel string type and so on
.
Servo acceleration inclinometer and resistance strain gauge are commonly used
.
Servo acceleration inclinometer has higher accuracy and is widely used at present
.
The inclinometer has a pair of pulleys at the top and bottom, and the track distance is 500mm
.
Its working principle is to measure the inclination angle between the central axis of the instrument and the vertical line of the pendulum by using the nature that the gravity pendulum always maintains the vertical direction
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The change of the inclination angle can be obtained by electric signal conversion, so that the displacement change value of the measured structure can be known
.
(3) operation points
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① The embedded inclinometer pipe shall be vertical
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If it is embedded in pile or diaphragm wall, the inclinometer pipe and reinforcement cage shall be tied tightly
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② The inclinometer pipe has two pairs of directional grooves perpendicular to each other, one of which is perpendicular to the side line of the foundation pit
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③ When measuring, the inclinometer must be basically consistent with the temperature in the pipe, and the indicator reading is stable before measuring
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④ Since the inclinometer measures the relative displacement between two pulleys (500mm), it is necessary to select the fixed point in the inclinometer tube as the reference point
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Generally, the end point at the bottom of the tube is the reference point
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The actual displacement of each point is the accumulation of the relative displacement from the measuring point to the reference point
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The inclinometer pipe shall be buried below the excavation face: the rock layer shall not be less than 1m, and the soil layer shall not be less than 4m
.
Shanghai Kaiyan testing company specializes in automatic monitoring of subway, tunnel, slope, subgrade, foundation pit, bridge health monitoring, etc
.
it is a technology enterprise integrating monitoring, instrument research and development, production and sales
.
Our company cooperates with China Railway No.3 engineering group, China Railway No.11 engineering group, China Railway Tunnel Engineering Group, China Railway No.17 engineering group, Tongji University, water conservancy research institute, Zhejiang University, etc Research institutes maintain perennial strategic cooperation
.
Contact person: Ye Gong 13046632883
.
