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Drill pressure real-time measurement device during construction of cement mixing pile

A cement-soil mixing pile and drill bit pressure technology, applied in the field of geotechnical engineering, can solve the problems of not considering the distribution characteristics of the soil, the inability to perceive the change of the soil layer, and the inability to automatically identify the soil layer, etc., so as to improve the foundation effect and reduce the construction cost , The effect of reducing cement waste

Active Publication Date: 2018-08-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of determining the amount of cement does not take into account the distribution characteristics of the actual soil. When the amount of cement determined by the weakest soil layer is applied to other soil layers, it will inevitably cause waste.
[0003] The current cement-soil mixing pile driver is operated manually, and its drilling speed and spraying speed remain unchanged during the drilling process. Operators will only manually adjust when there are obvious abnormalities such as drill sticking and sudden increase in current. When the abnormality disappears, normal construction will resume. In addition, the operator can hardly perceive the change of the soil layer, so it is impossible to manually adjust the amount of spray grout according to the change of the soil layer.
At present, the construction of cement-soil mixing piles cannot automatically identify the actual situation of the soil layer, and adjust the spraying amount in real time

Method used

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  • Drill pressure real-time measurement device during construction of cement mixing pile
  • Drill pressure real-time measurement device during construction of cement mixing pile
  • Drill pressure real-time measurement device during construction of cement mixing pile

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a real-time measurement device for drill bit pressure during the construction of cement-soil mixing piles includes a single-bridge static penetration probe and a special joint. The single-bridge static penetration probe is fixed to the drill pipe of the cement-soil mixing pile through a special joint 7 the end of. figure 2 The refitted single-bridge static penetration probe used in this embodiment includes a probe cone 1, a probe sleeve 2, a probe tube 3 and an elongated steel tube 4. The elongated steel tube has a square cross-section and a length of 100mm. Weld a pair of steel bars with a length of 20mm and a width of 10mm symmetrically. The main body of the special joint is cylindrical, and it is formed by joining two completely symmetrical parts 13 through four bolts 10. image 3 For split part 13, Figure 4 For No. 1 liner 5, Figure 5 No. 2 liner 6, No. 1 liner 5 and No. 2 liner 6 are used to fix the single-bridge static penetrating...

Embodiment 2

[0026] Such as figure 1 As shown, a real-time measurement device for drill bit pressure during the construction of cement-soil mixing piles includes a double-bridge static penetration probe and a special joint. The double-bridge static penetration probe is fixed to the drill pipe of the cement-soil mixing pile through a special joint 7 the end of. figure 2 The refitted double-bridge static penetration probe used in this embodiment includes a probe cone 1, a probe sleeve 2, a probe tube 3 and an elongated steel tube 4. The elongated steel tube has a square cross-section and a length of 100mm. Weld a pair of steel bars with a length of 20mm and a width of 10mm symmetrically. The main body of the special joint is cylindrical, and it is formed by joining two completely symmetrical parts 13 through four bolts 10. image 3 For one of the split parts 13, Figure 4 For No. 1 liner 5, Figure 5 No. 2 liner 6, No. 1 liner 5 and No. 2 liner 6 are used to fix the double-bridge static...

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Abstract

The invention discloses a drill pressure real-time measurement device during construction of a cement mixing pile. The device includes a single-bridge cone penetration test probe, a special connectorand a monitoring main machine; the single-bridge cone penetration test probe is installed at the end of a cement mixing pile drilling rod through the special connector, and during downward drilling, data measured in real time by the single-bridge cone penetration test probe reflects the drill pressure of the cement mixing pile and is remotely transmitted to the monitoring main machine on a cementmixing pile machine for analysis, actual conditions of the soil layer where a drill is located are obtained, and the speed of spraying slurry is adjusted according to the actual conditions to achievedifferential slurry spraying at different soil layers. The drill pressure real-time measurement device has the advantages that different soil layers within a pile formation depth range are accuratelyidentified, the amount of sprayed slurry is adjusted in real time according to actual properties of the soil layers, construction parameters are optimized, and the foundation treatment effect of the cement mixing pile is improved. A result can be judged according the soil layers in real time, the amount of the sprayed slurry is adjusted in real time on the basis of designed intensity, unnecessarywaste of cement is reduced, and the manufacturing price of engineering is reduced.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a drill bit pressure real-time measuring device during construction of cement-soil mixing piles. Background technique [0002] Cement-soil mixing pile technology is a foundation reinforcement method widely used at home and abroad. The amount of cement added is still determined according to the weakest soil layer during design, and the drilling speed and spraying speed are determined according to the amount of cement added during construction. However, this method of determining the amount of cement does not consider the distribution characteristics of the actual soil. When the amount of cement added to the weakest soil layer is applied to other soil layers, it will inevitably cause waste. [0003] The current cement-soil mixing pile driver is operated manually, and its drilling speed and spraying speed remain unchanged during the drilling process. Operators will ...

Claims

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Application Information

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IPC IPC(8): E21B47/013E21B49/00E21B17/00
CPCE21B17/00E21B47/01E21B49/00
Inventor 朱志铎万瑜高波刘锦平
Owner SOUTHEAST UNIV
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