Porthole connection section of combined anchor bar and its manufacturing process
A connecting section and combined technology, applied in the installation of bolts, infrastructure engineering, construction, etc., can solve the problems of cost reduction, strength reduction, large grouting resistance, etc., to reduce manufacturing costs, save materials, and achieve smooth grouting. Effect
Active Publication Date: 2009-07-22
JIANGXI FENGQIANG TECH DEV CO LTD
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- Abstract
- Description
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Problems solved by technology
[0011] The invention provides an orifice connection section for a combined anchor rod, which solves the problems of the existing orifice connection section that the strength is reduced after the grouting through hole is opened, or the grouting resistance is relatively large, and reduces the cost
Method used
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[0034] As shown in the figure, the orifice connecting section of a combined bolt is composed of a hollow bolt body 1b and a connecting section 1c. The hollow bolt body 1b and the connecting section 1c are connected as a whole, of course, they can also be connected by threads. The outer surface of the opposite end of the hollow anchor body 1b and the connecting section 1c is provided with external threads for mating with the nut 5; the inner cavity 2 of the connecting section 1c is connected and matched with the solid anchor body 4, and the connection method is threaded connection Or squeeze connection.
[0035] The connecting section 1c and the central anchor body 1b are both a circular steel pipe, and the middle part of the connecting section 1c is molded to form an enlarged section 1a, and the length of the enlarged section 1a is approximately 1 to 3 times the outer diameter of the circular steel pipe. The length of the hollow bolt body 1b is generally 100-6000 mm; the length of...
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Abstract
The invention discloses an orifice connecting section used for a combined anchor, consisting of a hollow anchor body and a connecting section; one end of the connecting section is connected with the hollow anchor body and the other end thereof is connected with a solid anchor body of the combined anchor; the connecting section is a round steel pipe, the middle of which is provided with an enlarging section with the circumference of the cross-section in a cut round shape; the pipe wall where the center of the cut round surface of the enlarging section is thinner than that of the round steel pipe; furthermore, the center of the cut round surface is provided with at least a slurry outlet through hole; the pipe wall where the arc surface of the enlarging section is thicker than the pipe wall of the round steel pipe, thus ensuring that the strength of the enlarging section is not less than that of the round steel pipe. The external circumference of the cross-section of the enlarging section of the orifice connecting section is cut round shape and the internal circumference thereof is a round shape, thus leading the pipe wall of the center of the cut round surface to be thinner than the round steel pipe; furthermore, the effective length of the injection through hole is short and the injection is more smooth.
Description
Technical field [0001] The invention relates to the technical field of anchoring and supporting of geotechnical engineering, in particular to an orifice connecting section for grouting bolts and a manufacturing process thereof. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent stratum deformation, collapse or instability and endanger safety, one of the main supporting technical means to strengthen the stratum is to use bolts . [0003] There are many types of bolts, one of which is grouting bolts is widely used. There are two types of grouting bolts: hollow grouting bolts and solid grouting bolts. The solid grouting anchor rod is a traditional type of anchor rod. The solid rod body is usually threaded steel. The grouting of the anchor rod requires grouting and exhaust pipes. The grouting process is more complicated. If the construction is not i...
Claims
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IPC IPC(8): E02D5/74E02D17/20E21D21/00B21D15/06
Inventor 吴德兴吕志平
Owner JIANGXI FENGQIANG TECH DEV CO LTD