A soil nail diameter expanding device and diameter expanding method

A soil nailing and soil layer technology, which is applied to earth drilling, drilling equipment and methods, and excavation, can solve the problems of waste, uniformity, and increase the tensile bearing capacity of the anchorage section of soil nails, and achieve the effect of reducing project cost

Inactive Publication Date: 2016-08-24
ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soil nails currently used in the project cannot provide tensile bearing capacity. The cross-sectional diameter of the free section and the anchor section is the same, and the waste is obvious. Increasing the tensile bearing capacity of the anchor section of the soil nail is an ideal way to reduce the project cost.

Method used

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  • A soil nail diameter expanding device and diameter expanding method
  • A soil nail diameter expanding device and diameter expanding method
  • A soil nail diameter expanding device and diameter expanding method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] Such as Figure 1-6 As shown, the novel soil nail diameter expansion device of the present invention includes a mandrel knob 1, a mandrel 2, a mandrel knob advance and retreat control device 10, a drill rod 3 and a cylindrical gear 4, and the mandrel knob 1 and the cylindrical gear 4 pass through the mandrel 2 connection, the cylindrical gear 4 is inside the drill pipe 3, the first diameter expansion wing 6-1 and the second diameter expansion wing 6-2 are respectively connected to the drill pipe 3 by the connecting piece 5, the first diameter expansion wing 6-1 and the second diameter expansion wing 6-2 The second expanding wing 6-2 is provided with a rack 9, and the rack 9 meshes with the cylindrical gear 4. The first expanding wing 6-1 is provided with a dovetail groove 7. Correspondingly, the second expanding wing 6-2 A dovetail tenon 8 is provided on the top, an...

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Abstract

The invention provides a soil nail diameter expanding device, comprising a mandrel knob, a mandrel, a mandrel knob advance and retreat control device, a drill rod and a cylindrical gear, the mandrel knob and the cylindrical gear are connected through the mandrel, and the cylindrical gear Inside the drill rod, it also includes a first diameter-expanding wing and a second diameter-expanding wing, the first diameter-expanding wing and the second diameter-expanding wing are respectively connected to the drill rod by connecting pieces, and the first diameter-expanding wing and the second diameter-expanding wing are respectively connected to the drill rod. Racks are respectively arranged on the second diameter-expanding wings, and the racks are meshed with cylindrical gears. The present invention also provides a soil nail diameter expansion method; the novel soil nail diameter expansion device and the diameter expansion method of the present invention can very conveniently expand the diameter of the soil nail hole to the size required by the design at the anchorage section of the soil nail, making the support The protection structure achieves economical, safe and reasonable design goals, and reduces the project cost.

Description

technical field [0001] The invention belongs to the field of building construction, in particular to a novel soil nail diameter expanding device and a diameter expanding method. Background technique [0002] Soil nailing is a foundation pit support technology. The function principle of the soil nail wall is to reinforce the slope of the foundation pit with soil nails made of steel bars and cement mortar. The length of the soil nail includes two parts: the free section and the anchor section. The free section refers to the part inside the linear sliding surface, and the anchor section refers to the part outside the linear sliding surface. Because the free section of the soil nail cannot provide tensile bearing capacity, it provides tensile bearing capacity. It is only the soil nail anchorage section. The soil nails currently used in the project have the same cross-sectional diameter as the free section and the anchor section, which cannot provide tensile bearing capacity, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D5/48E21B7/28
Inventor 秦鹏秦植海张喆瑜陈中文
Owner ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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