Wall thickness design method of glass fiber anchor rod cementing connection sleeve
A glass fiber and connecting sleeve technology, which is applied in design optimization/simulation, instrumentation, geometric CAD, etc., can solve problems such as high cost, blindness in determining the wall thickness of connecting sleeves, and restrictions on the application of glass fiber anchors, etc., to achieve The effect of reducing engineering cost and improving engineering construction efficiency
Pending Publication Date: 2022-08-09
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology
The anchor body of the glass fiber anchor is a glass fiber reinforcement, which is limited by the transportation conditions. The glass fiber reinforcement is generally 6m to 12m, which limits the application of the glass fiber anchor in support engineering.
[0003] Since the glass fiber reinforcement itself is a thermosetting material, once the glass fiber reinforcement is formed, the existing welding, high-temperature welding, mechanical connection and other methods cannot reliably connect the multi-section glass fiber reinforcement, so a new type of fiberglass reinforcement must be explored. The connection form - casing cementation
In practice, the wall thickness of the casing is often summed up from a large number of experiments, and no scientific and reliable design method has been formed, which leads to blindness in determining the wall thickness of the connecting casing, and the cost of product finalization is high, which limits many Marketing Promotion of Knotted Fiberglass Bolts
Method used
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[0067] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.
[0068] A method for designing the wall thickness of the glass fiber anchor rod cemented connection sleeve of the present embodiment, the specific steps are as follows:
[0069] Step 1: Select the diameter of the glass fiber rod, the thickness of the glue injection layer, and determine the inner diameter r of the casing 1 ;
[0070] Step 2: Select the casing material and cementing material, and propose the ultimate tensile strength value ([σ]), yield strength value ([σ′]) of the casing, and the elastic modulus of the rod body (E 杆 ), the limit line strain of the rod body (ε u杆 );
[0071] Step 3: Calculate the casing outer diameter r from equation (27) 2 ,
[0072]
[0073] Among them, ...
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The invention provides a wall thickness design method for a glass fiber anchor rod cementing connection sleeve, and relates to the technical field of anchor rod supporting engineering. According to the method, the sleeve wall thickness of the glass fiber anchor rod cementing connection sleeve is solved through elastic mechanics, then strength checking calculation is conducted through the material mechanical strength theory, and therefore the reasonable sleeve wall thickness of the glass fiber anchor rod cementing connection sleeve is designed. According to the method, the wall thickness design of the glass fiber anchor rod cementing connection sleeve can be objectively carried out, the connection safety of the glass fiber anchor rod is ensured, the number of tests in the preliminary design of the connection sleeve is reduced, the design strength requirement of the anchor rod is met, the construction efficiency is improved, and the engineering construction cost of the glass fiber anchor rod is reduced.
Description
technical field [0001] The invention relates to the technical field of bolt support engineering, in particular to a method for designing the wall thickness of a cemented connection casing of a glass fiber bolt. Background technique [0002] The fiberglass bolt is an easy-to-remove bolt support structure, which creates conditions for the demolition of the support structure of the underground projects near the subway and the adjacent underground space projects. It is a support that can meet the protection of the underground red line in the future. structure type. The bolt body of the glass fiber bolt is glass fiber reinforced material, which is limited by transportation conditions, and the glass fiber reinforced material is generally 6m to 12m, which limits the application of glass fiber bolt in support engineering. [0003] Since the glass fiber bar itself is a thermosetting material, once the glass fiber bar is formed, the existing forms of welding, high temperature welding...
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Patent Timeline
Login to View More IPC IPC(8): G06F30/20G06F30/17G06F119/14
CPCG06F30/20G06F30/17G06F2119/14Y02E10/20
Inventor 宋雪松董天文
Owner LIAONING TECHNICAL UNIVERSITY