本文選題：道路工程 + 邊坡錨固系統(tǒng)��； 參考：《中國(guó)公路學(xué)報(bào)》2017年05期

【摘要】：為研究強(qiáng)震作用下邊坡錨固系統(tǒng)的抗震作用及破壞特征,采用振動(dòng)臺(tái)模型試驗(yàn),分別輸入汶川波、EL-Centro波、正弦波作為地震激勵(lì),監(jiān)測(cè)坡體加速度、錨桿和格構(gòu)梁的應(yīng)變,研究加固滑坡在強(qiáng)震作用下的動(dòng)力響應(yīng)差異以及不同位置錨桿和格構(gòu)梁在地震作用下的受力特征。結(jié)果表明:強(qiáng)震作用下,坡腳剪切松弛區(qū)的形成導(dǎo)致坡腳首先進(jìn)入塑性區(qū),坡腳錨桿的承載能力受到影響,坡腳處的橫梁出現(xiàn)拉彎變形;由于潛在滑面的存在,坡體上部土體易發(fā)生張拉破壞,坡頂首層錨桿受拉作用增強(qiáng),中上部的格構(gòu)梁和錨桿存在明顯的不協(xié)調(diào)性,坡頂?shù)氖讓訖M向格構(gòu)梁發(fā)生拉彎變形;與橫梁相比,豎梁的彎應(yīng)變較小,各層的應(yīng)變差值不大,與錨桿的協(xié)調(diào)性較好;建議在擬靜力法設(shè)計(jì)的基礎(chǔ)上,在錨固滑坡坡腳密集地打入短錨桿或土釘以平衡坡腳滑面處出現(xiàn)的不協(xié)調(diào)往復(fù)運(yùn)動(dòng);加長(zhǎng)設(shè)計(jì)坡頂?shù)牡?層錨桿,以抑制坡頂滑面處的拉張裂縫;同時(shí)在坡體頂面垂直地打入短錨桿、微型樁或種植根系發(fā)達(dá)的植物護(hù)坡,且在格構(gòu)梁設(shè)計(jì)時(shí)應(yīng)多考慮橫梁的拉彎變形。
[Abstract]:In order to study the earthquake resistance and failure characteristics of slope Anchorage system under strong earthquake, the vibration table model test was used to input Wenchuan wave EL-Centro wave and sine wave as seismic excitation to monitor the slope acceleration, the strain of anchor rod and lattice beam. The difference of dynamic response of reinforced landslide under strong earthquake and the stress characteristics of anchors and lattice beams in different positions under earthquake are studied. The results show that under strong earthquake, the formation of shear relaxation zone at the foot of the slope leads to the first entry of the slope foot into the plastic zone, the bearing capacity of the anchor rod at the foot of the slope is affected, and the beam at the foot of the slope is subjected to tension and bending deformation, due to the existence of the potential sliding surface. The soil in the upper part of the slope is prone to tensile failure, the tensile action of the anchors at the top of the slope is enhanced, the lattice beam and the anchor rod in the middle and upper part of the slope are not in harmony, and the transverse lattice beam of the top of the slope is subjected to tensile bending deformation, which is compared with the transverse beam. The flexural strain of vertical beam is small, the strain difference of each layer is small, and the coordination with anchor is better. It is suggested that based on the design of pseudostatic method, The short anchor rod or soil nailing is used to balance the incongruous reciprocating movement at the sliding surface of the slope foot, and the first layer anchor rod of the slope top is extended to restrain the tension crack of the slope top slide surface. At the same time, the short anchor rod, micro-pile or plant with developed root system should be inserted vertically on the top of the slope to protect the slope, and the strain of the beam should be considered in the design of the lattice beam.
【作者單位】： 長(zhǎng)安大學(xué)地質(zhì)工程與測(cè)繪學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41440021,41102177) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(310826175029)
【分類號(hào)】：U416.14

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