Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method

A technology of construction quality and electric detection, which is applied in the direction of basic structure engineering, basic structure test, material impedance, etc., can solve the problems of no major progress and inability to detect the results of concrete construction quality, so as to improve the guarantee rate and reduce the construction quality Accidents, the effect of improving the level of construction quality

Inactive Publication Date: 2007-01-24
陈彦平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are already some instruments and equipment related to hole quality testing, sediment thickness testing, and concrete interface testing, but they can only detect some factors that affect the construction quality of pile foundations, and cannot detect the results of concrete construction quality.
Pile foundation construction quality monitoring is the development direction of engineering inspection, but there is still no major progress

Method used

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  • Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method
  • Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method
  • Method for monitoring pile foundation construction quality and reinforcing pile foundation by electric exploring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Pile foundation concrete pouring quality monitoring I

[0028] as attached figure 1 As shown, the hole 12 of the pile foundation 2 is mud 13 before concrete pouring. The electric detector 1 is connected and installed on the outer periphery of the outlet of the conduit 4 through the wire 3, and the sensor 5 made of two fixed electrodes measures the change of the voltage Vr caused by the change of the medium resistance to analyze the pouring quality of the concrete mixture 6, The state of the segregated concrete mixture 7 is judged.

[0029] 1. Calibrate the instrument according to the following requirements before testing.

[0030] 1.1 Prepare the concrete mixture according to the design requirements.

[0031] 1.2 Take the silt and mud deposited at the bottom of the pile, weigh the silt and mud with SN of 5.0%, 10.0%, 20.0%, 30.0%, 40.0%, 50.0%, and 60.0% respectively, and add them to the concrete mixing step by step and mix the segregated concrete mixture 7 in the s...

Embodiment 2

[0062] Pile foundation concrete pouring quality monitoring II

[0063] as attached figure 2 As shown, three sensors a, b, and c are evenly fixed and installed on the outer periphery of the outlet of the conduit 4 through the positioning member 17, and the nature of the concrete defect is defined according to the following method:

[0064] 1. The Vri of the three measuring points of a, b, and c are not less than Vrd, which means concrete segregation.

[0065] 2. If Vri is less than Vrd within any two measuring points of a, b, and c, it is a constriction.

[0066] 3. If the Vri of the three measuring points a, b, and c are all less than Vrd, the pile is broken.

[0067] The size of the aforementioned concrete defects is determined by the plane positions and elevations of the three sensors.

[0068] A sensor d is fixedly installed on the inner wall of the outlet of the conduit 4, and the channel d is selected to be displayed when the ball is sheared, so as to observe whether ...

Embodiment 3

[0072] Clean hole quality inspection

[0073] as attached image 3 As shown, the electric probe 1 puts the sensor 5 into the mud 13 of the hole 12 through the wire 3, measures the content of the sand 14 in the mud 13 and judges the thickness and state of the pile bottom sediment 11, and the detection implementation steps are as follows:

[0074] 1. Use the cleared mud to pass through a sieve with a diameter of about 0.074mm, and take no less than 4000g of pure mud after sieving as the mud with a sand content of 0 for future use. No additional water or other chemical substances should be added during the preparation process to ensure that the pure mud has the same physical and chemical properties as the mud used for engineering piles except for the sand content.

[0075] 2. Take out the sediment outside the pile when cleaning the hole, wash off the mud in the sand with water, dry (dry) and pass through a sieve with an aperture of about 1.5mm, and take 4000g of sand for later u...

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Abstract

The invention relates to a method of quality monitoring and reinforcement technology for pile construction using electrical resistivity survey method, which is suitable for construction quality monitoring of bored pile, underground diaphragm wall, tube-sinking cast-in-situ pile, CFG pile, etc. It is mainly characterized in that electrical resistivity survey method is used to detect declogging quality, monitor construction quality of concrete perfusion, and as a result, concrete faults property, affected extent and producing reasons can be judged accurately; and in concrete flow state, faults consolidation can be taken and treatment effects can be detected after that; water quality of sound ranging pipe can be also detected; and underground potential flow can be detected and treated. The invention says goodbye to the time of empirical pile construction, improves engineering quality effectively, reduces loss and guarantees construction period.

Description

technical field [0001] The invention relates to a method for quality detection, monitoring and reinforcement treatment technology in the construction process of drilled (digged) hole piles, underground continuous walls and immersed pipe grouting piles. Background technique [0002] Pile foundation engineering is a hidden project, and the factors that affect the quality of pile foundation construction are ever-changing. There are many quality problems and serious consequences. The pile foundation inspection market in China has reached a scale of more than one billion yuan. The quality of pile foundation construction is the key to control project quality, cost and construction period. At present, the practice of ensuring the quality of the project through the acceptance inspection after the pile is completed seems to be lagging behind and must pay for it. The monitoring of the pile foundation construction process is becoming more and more important. There are some instrument...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00G01N27/02
Inventor 陈彦平
Owner 陈彦平
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