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Drilling tool for sleeving anchor cable and construction method for sleeving anchor cable with simultaneous casing

A construction method and anchor cable technology, which are applied to drilling equipment and methods, drill pipes, casings, etc., can solve problems such as required drilling tools, and achieve the effects of saving time, simple and easy construction process, and saving costs.

Inactive Publication Date: 2012-07-04
北京住总集团有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a drilling tool for pulling the anchor cable and a construction method for taking the anchor cable with the casing, to solve the problem of deep foundation pit support structures such as underground anchor cables and anchor rods in shield construction. The technical problem of pre-clearing the anchor cable or bolt; and solving the problem of the drilling tools required for the removal of the anchor cable or bolt

Method used

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  • Drilling tool for sleeving anchor cable and construction method for sleeving anchor cable with simultaneous casing
  • Drilling tool for sleeving anchor cable and construction method for sleeving anchor cable with simultaneous casing
  • Drilling tool for sleeving anchor cable and construction method for sleeving anchor cable with simultaneous casing

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Experimental program
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Effect test

Embodiment 1

[0045] Embodiment one sees figure 1 , 2 As shown, a drilling tool for pulling anchor cables is formed by connecting a drill bit 1 and a drill rod 2. The drill bit 1 and the drill rod 2 are connected by a screw thread 3, and the drill rod 2 is a threaded wire at the end. The hollow, high-strength alloy steel pipe with buckle 3 has several sections of drill pipe, each section is 1-2m. The drill bit is a section of hollow alloy steel pipe with a ring of alloy steel teeth evenly distributed on the front end. The end of the drill bit is the inner ring protruding from the outer ring end of the outer ring inner sleeve, and four alloy steel teeth are evenly welded on the outer surface of the outer ring and the inner ring respectively, which are designed as a zigzag tooth 4. The alloy steel teeth welded on the outer ring and the inner ring protrude from the top surface of the outer ring and the inner ring, and the alloy steel teeth welded on the outer ring, the alloy steel teeth weld...

Embodiment 2

[0046] Embodiment two see image 3 , 4 As shown, the difference from Embodiment 1 is that the end of the drill bit 1 is a rectangular tooth 5, and the screw thread 3 on the drill bit 1 is an external thread. The alloy steel teeth at the front end of the drill bit 1 are alloy steel teeth formed by cutting the front end of the drill bit 1 to form tooth grooves, embedded in the tooth grooves and adding welding tooth blocks, and the alloy steel teeth are rectangular teeth 5 . There are triangular gaps 6 between the alloy steel teeth and the adjacent alloy steel teeth. The outer diameter of the front end of the drill bit embedded with alloy steel teeth is 150mm, the total length of the drill bit is 180mm, the length of the thread segment is 70mm, and the three serrations are arranged at intervals of 120 degrees.

Embodiment 3

[0047] Embodiment three see Figure 5 , 6 As shown, the difference from Embodiment 2 is that the pipe wall at the front end of the drill bit 1 is in the shape of a step with a high inside and a low outside, and a screw hole 8 connected to the drill pipe is separated from the low step on the outside of the pipe wall, and the Π-shaped tooth block 9 ride on the high step inside the front end of the pipe wall and weld with it. There are rectangular grooves on both sides of the Π-shaped tooth block, and the rectangular grooves are embedded with rectangular teeth 5 protruding from the end of the drill bit. The screw thread 3 on the drill bit is an inner thread. The outer diameter of the end of the drill bit with welded alloy steel square teeth is 127mm, the total length of the drill bit is 200mm, and the length of the thread section is 70mm. Alloy steel square teeth are staggered every 90 degrees. is 5mm.

[0048] Construction method of the present invention sees Figure 7 Fig...

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Abstract

The invention relates to a drilling tool for sleeving an anchor cable and a construction method for sleeving the anchor cable with a simultaneous casing. A drill bit and a plurality of drill rods of the drilling tool adopt bolted connection or screwed connection, the plurality of drill rods adopt bolted connection or screwed connection, the drill bit is made of special alloy steel, the drill rodsare made of high-strength alloy steel material, and the drill bit is provided with sawteeth, welded alloy steel square teeth and inlaid alloy steel teeth. When the drilling tool is adopted to sleeve the anchor cable or an anchor rod, the simultaneous casing is sleeved outside the drilling tool; the drilling tool is installed on a drilling machine; the head of the anchor cable or the anchor rod isfixedly connected in the central position of the simultaneous casing of the drilling tool of the drilling machine; the drilling angle is kept consistent with the anchor cable or the anchor rod in thedrilling process; the anchor cable or the anchor rod is taken out when the drilling tool drills to the tail of the anchor cable or the anchor rod; and finally a drill hole is sealed by cement mortar.By adopting the construction method, the anchor cable or the anchor rod in a stratum can be removed before a refilling process or in the refilling process of a foundation pit in advance to provide conditions for saving and cleaning underground space, which can shorten construction period, improve construction efficiency, save construction fund and effectively guarantee the safety of constructors.

Description

technical field [0001] The invention relates to a drilling tool for sheathing anchor cables and a construction method for sheathing anchor cables. Background technique [0002] Shield technology is playing an increasingly important role in the construction of urban subways, especially when passing through some important buildings, important municipal facilities and complex geological sites. However, when the shield construction encounters deep foundation pit support structures such as underground anchor cables and anchor rods, it is easy to cause the cutter head to wrap around the anchor cables and bolts, and the screw machine to wrap around the anchor cables and bolts, etc., resulting in long-term shutdown of the shield machine. Unable to construct normally. Moreover, when the cutter head pulls anchor cables and anchor rods, it may cause large-scale disturbance of the ground, excessive surface settlement, rupture of underground pipelines, settlement of buildings, tilting a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21B17/042E21B10/00E21D20/00E21D9/10
Inventor 颜治国张智宏吴亮
Owner 北京住总集团有限责任公司