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Pile end resistance force test method of prestress high-strength concrete pipe pile

A technology of concrete pipe pile and pile end resistance, which is applied in the direction of measuring the force of frequency change of stressed vibration element, etc., to achieve the effects of high test accuracy, convenient operation and strong operability

Active Publication Date: 2015-05-13
闫楠
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Problems solved by technology

At present, there are many methods for determining the pile end resistance, but because there are too many uncertainties in the end resistance problem, and the standard value of the ultimate end resistance of the pile is consistent with the "Technical Specifications for Building Pile Foundations" (JGJ94-2008 ) or the end resistance parameters provided by the investigation report are often quite different

Method used

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  • Pile end resistance force test method of prestress high-strength concrete pipe pile
  • Pile end resistance force test method of prestress high-strength concrete pipe pile
  • Pile end resistance force test method of prestress high-strength concrete pipe pile

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Embodiment

[0017] This embodiment is implemented in a prestressed high-strength concrete pipe pile end resistance test device, and the specific test process is as follows:

[0018] (1), first weld the processed first reinforced steel plate 2, the second reinforced steel plate 3 and the third reinforced steel plate 4 with the circular steel plate at the pile end of the pipe pile 1, the first reinforced steel plate 2, the second reinforced steel plate A hole is reserved in the center of the steel plate 3 and the third reinforced steel plate 4 to facilitate the free passage of the shielded wire 9;

[0019] (2), one end of the steel casing 5 is welded with the third reinforced steel plate 4, so that the axis of the steel casing and the axis of the pipe pile are on the same straight line;

[0020] (3), stiffener 7 is welded with the outer side of the third reinforced steel plate 4 and steel casing 5, increases the intensity and the stability of steel casing 5, makes stiffener 7 evenly distrib...

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Abstract

The invention belongs to the technical field of resistance test equipment, and relates to a pile end resistance force test method of a prestress high-strength concrete pipe pile. A prestress high-strength concrete pipe pile end resistance test device is installed firstly, an initial value of an axial force meter is timely measured after an external static pressure device is installed and positioned, data are read by utilizing a vibration wire type frequency reading device in the pressing-in process of the pipe pile, the pressure applied to the axial force meter is obtained based on the parameter index of the axial force meter and the read data, then the pipe pile end resistance is obtained through calculation, and a measurement result is achieved. According to the pile end resistance force test method of the prestress high-strength concrete pipe pile, the used device is simple in structure, convenient to operate, low in cost, high in measuring accuracy, high in operability, and capable of carrying out real-time monitoring.

Description

Technical field: [0001] The invention belongs to the technical field of resistance testing equipment, and relates to a test process for pile end resistance in foundation engineering, in particular to a test method for pile end resistance of prestressed high-strength concrete pipe piles. Background technique: [0002] Prestressed high-strength concrete (PHC) pipe piles have the characteristics of high bearing capacity, fast construction speed, high work efficiency, short construction period, and low project cost. The method is reliable, and has no vibration, no noise, stable quality, easy to achieve civilized construction, safe production, very suitable for construction in urban areas and other places where noise is restricted, and is also an effective measure to improve indirect economic benefits. widely used. As far as pile tip resistance is concerned, it is an important part of pile bearing capacity and has been valued by scholars at home and abroad. The resistance of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/10
Inventor 白晓宇闫楠
Owner 闫楠
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