Rotary extrusion double-layer nested disc-shaped expansion head anchor rod and its use method
An enlarged head and dish-shaped technology, which is applied in the field of rotary extrusion double-nested dish-shaped enlarged head bolts, can solve the problems that the fullness of grouting cannot be reliably guaranteed and cannot be
Active Publication Date: 2020-07-07
HOHAI UNIV
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Problems solved by technology
The anchoring method of anchor pipe support is generally grouting anchoring. There are two difficulties in grouting anchoring. One is that the fullness of grouting cannot be reliably guaranteed, and the other is that it takes a period of time for grouting to solidify and cannot be used for timely reinforcement.
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[0024] The present invention proposes a rotary extrusion double-layer nested disc-shaped expansion head anchor rod, the overall structure of which includes four parts: the main shaft of the anchor rod, the disc-shaped expansion head sleeve, the extruded plastic expansion tube, and the rotary extrusion outer sleeve .
[0025] The anchor rod main shaft 1 in the structure is a solid round rod-shaped rod, and the diameter of the end part is slightly larger than the rear part, so as to prevent the disc-shaped expansion head sleeve 3 from slipping out of the anchor rod. On the anchor rod where the disc-shaped expansion head sleeve 3 is placed There are threads 2, and the disc-shaped expanding head sleeve 3 can be extruded and expanded by cooperating with the rotating extrusion outer sleeve 5, and then fixed;
[0026] The disc-shaped expansion head sleeve 3 in the structure is a metal cylinder with axially cut slits on the surface, and a circle of circular grooves is opened on the in...
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The invention provides a rotating extrusion double-layer-nested dished expanded head anchor rod and a using method thereof. The rotating extrusion double-layer-nested dished expanded head anchor rod is composed of an anchor rod main shaft, a dished expanded head sleeve, an extrusion plastic expansion pipe and a rotating extrusion outer sleeve. After being driven at the predetermined position, theanchor rod main shaft is sleeved with the dished expanded head sleeve, the dished expanded head sleeve is impacted and expanded through the rotating extrusion outer sleeve, and thus an expanded anchorage end is formed; the anchor rod main shaft is fixed in soil mass or rock mass to form pulling-resistant anchorage force; and the expanded dished expanded head sleeve is locked through the extrusionplastic expansion pipe for preventing loosening of anchorage. Connection between pieces of the soil mass is strengthened through a physical method, so that anti-sliding force of a slope is strengthened, accidents of soil mass sliding, collapse and the like which are caused by excavation of the slope of a foundation pit are avoided, and the stability of the foundation pit is improved; the construction efficiency is improved, and grouting materials are saved; the rotating extrusion double-layer-nested dished expanded head anchor rod and the using method thereof can be used for foundation pit excavation supporting engineering, and the safety and stability of the slope of the foundation pit are improved; and instruments of the rotating extrusion double-layer-nested dished expanded head anchorrod are easy and convenient to operate, and the construction efficiency is high.
Description
technical field [0001] The invention relates to a rotary extruded double-layer nested disc-shaped enlarged head anchor rod and a method for using the same. The invention is composed of a main shaft of an anchor rod, a sleeve of a disc-shaped expanding head, an extruded plastic expansion tube and a rotating extruded outer sleeve. After setting the main shaft of the anchor rod to the predetermined position, insert the sleeve of the disc-shaped expansion head, and use the rotating extrusion outer sleeve to impact and expand the sleeve of the disc-shaped expansion head to form an enlarged anchoring end, and fix the main shaft of the anchor rod In the soil or rock mass, an anti-pull anchoring force is formed, and then the expanded disc-shaped expansion head sleeve is locked with an extruded plastic expansion tube to prevent loosening of the anchorage, enhance the anti-sliding force of the slope, and avoid damage caused by the foundation Accidents such as soil sliding and collapse ...
Claims
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IPC IPC(8): E02D5/76
CPCE02D5/76
Inventor 高玉峰周源吴勇信张飞张宁
Owner HOHAI UNIV