玻璃鋼錨桿扭轉(zhuǎn)性能及錨固參數(shù)研究
發(fā)布時間：2018-11-06 17:27
【摘要】：本文玻璃鋼錨桿扭轉(zhuǎn)性能及錨固參數(shù)研究為課題,以理論分析為主,研究玻璃鋼錨桿的抗扭破壞規(guī)律及錨桿在彈性圍巖體錨固長度的探究與分析,并對其進行現(xiàn)場試驗的驗證和數(shù)值模擬的分析驗證,取得以下研究結(jié)論:1、在玻璃鋼錨桿在玻璃鋼錨桿在煤巖巷道的支護中,發(fā)現(xiàn)其抗扭性能相比與傳統(tǒng)螺紋鋼錨桿較差,當施加扭矩過大使其錨固性能失效,因此需要研究玻璃鋼錨桿的破壞規(guī)律,基于玻璃鋼錨桿理想化看作圓桿的狀態(tài)下的假說,在建立玻璃鋼錨桿的抗扭轉(zhuǎn)力學(xué)模型的基礎(chǔ)上,分析錨桿的抗扭力矩M與玻璃鋼錨桿由于扭轉(zhuǎn)而產(chǎn)生變形單位軸線長度的相對扭轉(zhuǎn)角θ的關(guān)系及變化趨勢,在經(jīng)過對錨桿扭轉(zhuǎn)破壞的研究中發(fā)現(xiàn),在給玻璃鋼錨桿施加扭矩為0-45N·m,玻璃鋼錨桿扭轉(zhuǎn)力矩M與單位軸線長度的相對扭轉(zhuǎn)角0的關(guān)系式θ = 2M/(πGr4)。2、根據(jù)錨桿的受力特征,首先,建立了圍巖—錨桿的力學(xué)模型,根據(jù)模型各種位移的分布,分析各種位移的之間的關(guān)系,從而得出支護前后的位移解析式。然后,對錨桿支護前后的各種能量關(guān)系進行分析,利用能量守恒原理,圍巖在沒有支護前所釋放總能量,等于圍巖在錨桿支護后各種能量的總量。最終,確定了錨桿錨固長度理論公式,分析研究了極限錨固長度的影響因素與規(guī)律。由于玻璃鋼錨桿相比于傳統(tǒng)的螺紋鋼錨桿具有許多優(yōu)點:質(zhì)量輕、容易切割、不產(chǎn)生火花、成本低等,但是玻璃鋼錨桿在實際應(yīng)用中常發(fā)生錨固失效現(xiàn)象,研究錨桿錨固失效的原因和提高錨桿錨固能力是當前現(xiàn)場生產(chǎn)實踐中需要迫切解決的重要課題。
[Abstract]:In this paper, the torsional properties and anchoring parameters of FRP anchor are studied. The torsional failure law of FRP anchor and the length of anchoring in elastic surrounding rock are studied based on theoretical analysis. The conclusions are as follows: 1. In the support of coal and rock roadway, it is found that the torsional resistance of FRP bolt is worse than that of traditional steel bolt. The failure rule of FRP anchor rod should be studied when the applied torque is too large. Based on the hypothesis that the FRP bolt is idealized as a circular rod, the torsional mechanical model of FRP bolt is established. The relationship between the torsional moment M of anchor rod and the relative torsional angle 胃 of the length of deformation unit axis caused by torsion of FRP anchor rod is analyzed, and the change trend is also analyzed. Through the research on the torsional failure of anchor rod, it is found that, The relationship between torsional moment M and relative torsion angle 0 of unit axis length is 胃 = 2M/ (蟺 Gr4). 2. According to the mechanical characteristics of the anchor, the relationship between torsional moment M and relative torsion angle 0 of unit axis length is obtained. 2. According to the mechanical characteristics of the anchor rod, the relationship between the torsion moment M and the relative torsion angle of unit axis length is obtained. The mechanical model of surrounding rock and bolt is established. According to the distribution of displacement in the model, the relationship between displacement is analyzed, and the analytical formula of displacement before and after supporting is obtained. Based on the principle of energy conservation, the total energy released by surrounding rock before and after bolting is equal to the total energy of surrounding rock after bolting. Finally, the theoretical formula of anchoring length is determined, and the influencing factors and rules of ultimate anchoring length are analyzed and studied. The FRP bolt has many advantages compared with the traditional rebar anchor, such as light weight, easy cutting, no sparking, low cost, etc. However, the Anchorage failure often occurs in the practical application of FRP anchor. It is an urgent task to study the reasons of bolt Anchorage failure and to improve the Anchorage ability of Anchorage rod in the field production practice.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353.6
本文編號：2314972
[Abstract]:In this paper, the torsional properties and anchoring parameters of FRP anchor are studied. The torsional failure law of FRP anchor and the length of anchoring in elastic surrounding rock are studied based on theoretical analysis. The conclusions are as follows: 1. In the support of coal and rock roadway, it is found that the torsional resistance of FRP bolt is worse than that of traditional steel bolt. The failure rule of FRP anchor rod should be studied when the applied torque is too large. Based on the hypothesis that the FRP bolt is idealized as a circular rod, the torsional mechanical model of FRP bolt is established. The relationship between the torsional moment M of anchor rod and the relative torsional angle 胃 of the length of deformation unit axis caused by torsion of FRP anchor rod is analyzed, and the change trend is also analyzed. Through the research on the torsional failure of anchor rod, it is found that, The relationship between torsional moment M and relative torsion angle 0 of unit axis length is 胃 = 2M/ (蟺 Gr4). 2. According to the mechanical characteristics of the anchor, the relationship between torsional moment M and relative torsion angle 0 of unit axis length is obtained. 2. According to the mechanical characteristics of the anchor rod, the relationship between the torsion moment M and the relative torsion angle of unit axis length is obtained. The mechanical model of surrounding rock and bolt is established. According to the distribution of displacement in the model, the relationship between displacement is analyzed, and the analytical formula of displacement before and after supporting is obtained. Based on the principle of energy conservation, the total energy released by surrounding rock before and after bolting is equal to the total energy of surrounding rock after bolting. Finally, the theoretical formula of anchoring length is determined, and the influencing factors and rules of ultimate anchoring length are analyzed and studied. The FRP bolt has many advantages compared with the traditional rebar anchor, such as light weight, easy cutting, no sparking, low cost, etc. However, the Anchorage failure often occurs in the practical application of FRP anchor. It is an urgent task to study the reasons of bolt Anchorage failure and to improve the Anchorage ability of Anchorage rod in the field production practice.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353.6
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，本文編號：2314972
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