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A real-time measuring device for drill bit pressure during construction of cement-soil 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: 2021-08-24
SOUTHEAST UNIV
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  • 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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  • A real-time measuring device for drill bit pressure during construction of cement-soil mixing pile
  • A real-time measuring device for drill bit pressure during construction of cement-soil mixing pile
  • A real-time measuring device for drill bit pressure during construction of cement-soil mixing pile

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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 real-time measuring device for drill bit pressure during the construction of cement-soil mixing piles, comprising: a single-bridge static sounding probe, a special joint and a monitoring host; the single-bridge static sounding probe is installed on the cement-soil through the special joint At the end of the drill pipe of the mixing pile, the data measured in real time by the single-bridge static penetration probe during the drilling process reflects the drill bit pressure of the cement-soil mixing pile, and the measured data is remotely transmitted to the monitoring host on the cement-soil mixing pile driver Through analysis, the actual soil layer where the drill bit is located is obtained, and the spraying speed is adjusted accordingly to realize different spraying in different soil layers. The beneficial effects of the present invention are: accurately identify different soil layers within the depth range of the pile, adjust the amount of spray grout in real time according to the properties of the actual soil layer, optimize the construction parameters, and improve the foundation effect of the cement-soil mixing pile; it can be judged according to the real-time soil layer , based on the design strength, real-time adjustment of the amount of grouting, reducing unnecessary waste of cement, lowering the cost of the project.

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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Patent Type & Authority Patents(China)
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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