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Expandable injection bolt and grouting method using same

A technology of bolts and expansion parts, which is applied in the field of grouting using the bolts, can solve problems such as poor reinforcement effect and insufficient fixing force, and achieve the effects of good pouring workability, loosening suppression, and leakage prevention

Active Publication Date: 2006-05-10
DENKA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the case of this expansion bolt, there is a problem that, when the surrounding foundation is weak, even if the expansion part is expanded, the fixing force is still insufficient, so that the reinforcement effect is not good.

Method used

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  • Expandable injection bolt and grouting method using same
  • Expandable injection bolt and grouting method using same
  • Expandable injection bolt and grouting method using same

Examples

Experimental program
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Embodiment Construction

[0047] Hereinafter, the present invention will be described with reference to the drawings.

[0048] Fig. 1 is a perspective view showing the first embodiment of the expansion grouting bolt of the present invention, the middle part is omitted, figure 2 It is a top view of the expansion grouting bolt shown in Figure 1, image 3 is a cross-sectional view of the expansion grouting bolt shown in Figure 1, Figure 4A and 4B It is an enlarged sectional view and an enlarged front view of the front end portion of the expansion grouting bolt shown in FIG. 1 .

[0049] Figure 1~ image 3 As shown, the expansion grouting bolt 1A of this embodiment is formed into a tubular shape provided with an inlet sleeve 2 (mouth sleeve) provided at the rear end and an expansion part 3 integrally connected to the front of the inlet sleeve 2, and is configured to be able to pass through the inlet sleeve. 2 Apply internal pressure.

[0050] The inlet sleeve 2 is in the shape of a circular tube that...

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Abstract

The present invention provides a tubular shape in which internal pressure can be applied from the rear end, has an expanding portion (3) that expands radially by applying internal pressure, and a filling opening forming portion (9A) that opens the filling opening (7) by applying internal pressure ) expansion grouting bolt (1A), after the expansion part (3) is expanded by the internal pressure, and the foundation is closely attached, the pouring port (7) is opened at the pouring port forming part (9A), and the pouring port (7) is The hardening grouting material is poured into the foundation to obtain foundation strengthening.

Description

technical field [0001] The present invention relates to an expansion grouting bolt used both as a rock anchor bolt and a pouring pipe in, for example, natural foundation reinforcement works of tunnel engineering, and a grouting method using the same. Background technique [0002] In the known technology, a drilling machine is used to drill a hole on the slope of the natural foundation, the pouring pipe is inserted into the drilled hole, and after hardening grouting materials such as cement slurry are poured, the steel bolt type rock anchor bolt is inserted into the drilled hole. , the rock anchor bolts are fixed by the hardening of the hardening grouting material, and the bolt portion of the rock anchor bolt protruding from the drill hole to the outside is passed through the support plate, and the nut is tightened to reinforce (for example, refer to Japanese patent Publication No. 2000-303480). [0003] As a rock anchor bolt that can be fixed without using a hardening grout...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00E02D5/80E21D21/00
CPCE21D21/004E02D5/80E21D20/00
Inventor 平野健吉阿波宏司
Owner DENKA CO LTD
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