Expanding anchor head, telescopic spiral grouting anchor rod and construction method

A grouting bolt and expansion technology, which is applied in the installation of bolts, excavation, earthwork drilling and mining, etc., can solve the problems of long bolts, insufficient anchoring force, inconvenience, etc., achieve construction safety and enhance the role of anchoring and supporting , easy storage effect

Pending Publication Date: 2022-04-15
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the anchoring force of the existing hollow anchor is not large enough, and the length of the anchor is too long, the transportation and construction are inconvenient.

Method used

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  • Expanding anchor head, telescopic spiral grouting anchor rod and construction method
  • Expanding anchor head, telescopic spiral grouting anchor rod and construction method
  • Expanding anchor head, telescopic spiral grouting anchor rod and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 2 , image 3 As shown, an expandable anchor head in this embodiment includes two sets of expansion components, a single set of expansion components includes a connecting rod 210 and a fixing cap 220, one end of the connecting rod 210 is connected to the fixing cap 220, and the connecting rod 210 are distributed along the circumference of the fixed cap 220, and the connecting rod 210 can rotate around the fixed cap 220; the two sets of expansion components are connected by a fixed bolt 230, and the fixed bolt 230 is provided with an anchor head spike 232. Specifically, the connecting rod 210 has an annular end, one end of the ring is connected with the fixing cap 220, and the other end is connected with the bolt hole 231 of the fixing bolt 230, and the ring can wrap around the fixing cap 220 and the fixing bolt 230. turn.

[0049] After the expansion-type anchor head of this embodiment is stressed, the connecting rod 210 expands outward into a shuttle s...

Embodiment 2

[0051] Such as figure 1 As shown, a telescopic spiral grouting anchor in this embodiment includes a hollow anchor body 100 and the above-mentioned anchor head 200, the outer wall of the hollow anchor body 100 is provided with a grouting hole 110, and the hollow anchor body One end of 100 is provided with a backing plate 300 , and the other end is connected with an anchor head 200 . The hollow anchor body 100 includes a first anchor body section 120, an anchor body tail section 140, and several anchor body middle sections 130. The inner and outer surfaces of each section of the anchor body are respectively provided with internal threads 160 and external threads 150. Each section of the anchor rod body is connected by threads. The internal and external surfaces of the anchor rod in this embodiment are provided with threads, and the rod body is provided with grouting holes, which can make the grouting even and full; The bonding area between the anchor body and the grouting mate...

Embodiment 3

[0056] Such as Figure 7 As shown, a telescopic spiral grouting anchor in this embodiment also includes a telescopic rotating rod 600, which includes a first segment of the rotating rod 610, a middle segment of the rotating rod 620 and a tail segment of the rotating rod 630 that are sequentially socketed. , the interior of the telescopic rotating rod 600 is provided with an axial limiting chute 680 , and each segment of the telescopic rotating rod moves telescopically along the limiting chute 680 . Wherein, one end of the telescopic rotating rod 600 is provided with a rotating handle 660, and the other end is provided with an elastic buckle 670, and the end of the hollow anchor body 100 away from the anchor head 200 is provided with a buckle that cooperates with the elastic buckle 670. Hole 180. Such as Figure 8 As shown, the telescopic rotating rod 600 and the hollow anchor body 100 are connected through the fitting structure between the elastic buckle 670 and the buckle h...

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PUM

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Abstract

The invention discloses an expansion type anchor head, a telescopic spiral grouting anchor rod and a construction method.The grouting anchor rod comprises a hollow anchor rod body, a telescopic rotating rod and the expansion type anchor head, the expansion type anchor head comprises connecting rods, a fixing cap and a fixing bolt, one end of each connecting rod is connected with the fixing cap, the connecting rods are connected through the fixing bolt, and the telescopic rotating rod is connected with the hollow anchor rod body. After the anchor head is stressed, the connecting rod expands outwards, and the anchor head sharp nail on the fixing screw is embedded into a soil body outwards; the hollow anchor rod body comprises an anchor rod body head section, an anchor rod body tail section and a plurality of anchor rod body middle sections, and the anchor rod body sections are connected through threads. The telescopic rotating rod comprises a rotating rod head section, a rotating rod middle section and a rotating rod tail section which are sequentially connected in a sleeved mode. A limiting sliding groove for axial movement of all the sections of the rotating rod is formed in the telescopic rotating rod. The expansion type anchor head disclosed by the invention has relatively strong anchoring force; in addition, the telescopic spiral grouting anchor rod is small in occupied space, convenient to transport and store and simple to operate while enhancing the anchoring and supporting effects.

Description

technical field [0001] The invention relates to a grouting anchor rod, more specifically, to an expandable anchor head, a retractable spiral grouting anchor rod and a construction method. Background technique [0002] As a supporting structure, the anchor rod is widely used in engineering technology to strengthen the main body of slopes, tunnels and dams. Bolt support construction is convenient and efficient, which is conducive to speeding up the construction progress, and the construction cost is low, and the support effect is good. Its application range and status in geotechnical engineering continue to expand and develop with the improvement of its technical level. . [0003] There are various types of bolts currently used in our country, among which grouted bolts are frequently used because of their hollow design and convenient grouting. The most commonly used is a mechanical expansion shell prestressed anchor, but the structure of the expansion shell anchor head embed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02E02D5/74E02D17/20
Inventor 黄金坤鲁照香汪磊徐永福王瀚陈醒明程攀陶智康
Owner CHINA MCC17 GRP
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