Detection system and method of prestressed steel strand anchor cable tension force

A technology of prestressed steel strand and detection system, which is applied in the test of basic structure, construction, and basic structure engineering, etc. It can solve the problems of inability to monitor the anchor cable of prestressed steel strand for a long time, rough loss judgment, high cost of large projects, etc. , to achieve the effect of improving rapid monitoring ability, improving stability and reliability, and preventing failure

Active Publication Date: 2022-07-22
HUNAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current detection method is to convert the prestress by obtaining the strain by installing sensors, attaching strain gauges, and measuring the distance of the rod body through acoustic waves. The cost is too high and inconvenient for large projects, and it is only suitable for scientific research; there is also the oil meter control method. Low (rough judgment on loss) and unable to monitor the prestressed value of the prestressed steel strand anchor cable for a long time

Method used

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  • Detection system and method of prestressed steel strand anchor cable tension force
  • Detection system and method of prestressed steel strand anchor cable tension force
  • Detection system and method of prestressed steel strand anchor cable tension force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0042] ①The construction unit conducts construction and lay-out according to the design drawings of the supporting structure, determines the position of the drilling hole 3 of the supporting structure of the rock mass 2, and constructs the drilling hole 3 in the rock mass 2; At the bottom of the borehole 3, an anchor body 11 that is mutually consolidated with the rock mass 2 is formed; one end of the steel strand 1 reaches the bottom of the borehole 3 through the borehole 3, and is anchored with the anchor body 11 at the bottom of the borehole 3; The other end of the wire 1 passes through the pallet 4 and the anchor 5 , the pallet 4 is placed at the hole of the borehole 3 , and anchored in the rock mass 2 , and the anchor 5 is kept in contact with the pallet 4 .

[0043] After the anchor body 11 reaches the anchoring strength, one end of the steel strand 1 passing through the anchor 5 is stretched, and after locking the anchor 5, the steel strand 1 becomes the prestressed steel...

Embodiment B

[0046] ①The process of transforming the steel strand 1 into the prestressed steel strand anchor cable 1a is completed after the construction operation. For example, the anchor 5 of type 5 has a diameter of 15.2 mm of steel strand 1, and the number of 1 steel strand is 5.

[0047] ②The acceleration sensor 7 is fixedly connected to the end face of the anchor 5 through the magnetic suction seat 71 (or rubber mud or gypsum mud). The vibration direction of the acceleration sensor 7 should be parallel to the length direction of the prestressed steel strand anchor cable 1a, such as figure 1 , 3 As shown, the acceleration sensor 7 is a YD-65 type product, the charge sensitivity is 414.15, the frequency measurement range is 5 to 2000Hz, and there is a matching magnetic suction seat 71 .

[0048] ③The acceleration sensor purchases DH-5922 data collector 9, which is connected to the acceleration sensor 7 by a shielded cable through the matching charge conditioner H5857-1. Connect the s...

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Abstract

The invention discloses a detection system for the tension force of prestressed steel strands and anchor cables. The anchor body fixed to the rock mass; one end of the steel strand is anchored in the anchor body at the bottom of the drill hole through the drilling hole, and the other end of the steel strand is passed through the supporting plate and the anchor; the supporting plate is set at the hole of the drilling hole and is anchored in the rock The anchor is kept in contact with the support plate; the anchor is provided with an acceleration sensor and a shock device, and the acceleration sensor is connected with the computer. The invention has the advantages of simple structure, low detection cost, safe and reliable use, not only can it adapt to the large-area detection requirements, but also can adapt to the effective tension force of various fastening components composed of steel strands, anchors matched with steel strands, etc. detection. The invention also discloses a method for detecting the tension force of the prestressed steel strand anchor cable.

Description

technical field [0001] The invention relates to an anchorage force detection device and method for anchoring rock mass by using steel strands and anchors together, in particular to a detection system and method for the tension force of prestressed steel strands and anchor cables. Background technique [0002] The prestressed steel strand anchor cable anchoring technology has been widely used due to its significant technical and economic benefits. As early as 1980, the reinforcement of coal mines in North Wales first appeared to reinforce rock layers with steel bars. In 1934, the heightening project of the Sherfa Dam in Algeria was the first to use the prestressed steel strand anchor cable. In 1964, the prestressed steel strand anchor cable was used in the dam foundation reinforcement of Meishan Reservoir for the first time in my country. In the early stage, the prestressed steel strand anchor cable was made of steel wire rope. With the introduction of high-strength steel s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00E02D2600/10
Inventor 钟新谷张天予彭雄
Owner HUNAN UNIV OF SCI & TECH
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