本文選題：拉力型錨桿 + 分布式承載體·擴(kuò)大頭錨桿　； 參考：《廣東工業(yè)大學(xué)》2014年碩士論文

【摘要】：迄今為止,錨固技術(shù)在工程中的應(yīng)用已經(jīng)有一百多年的歷史,巖土錨固已經(jīng)成為巖土工程領(lǐng)域的重要分支,特別是目前經(jīng)濟(jì)建設(shè)要求加快交通基礎(chǔ)設(shè)施建設(shè),因而需修建大量鐵路,公路隧道；同時(shí),城市人口數(shù)量激增,城市地域不斷擴(kuò)大,城市地下空間的開發(fā)利用勢在必行,在我國的巖土工程建設(shè)中采用錨桿進(jìn)行錨固具有相當(dāng)廣闊的應(yīng)用前景。相比于錨桿在工程中的廣泛應(yīng)用,對錨桿理論的研究卻顯得滯后,工程中因?yàn)殄^固問題而導(dǎo)致的事故時(shí)有發(fā)生。因此,有必要對錨桿錨固系統(tǒng)的工作機(jī)理進(jìn)行研究,以便為工程中錨桿的使用提供理論指導(dǎo)。 本文通過對傳統(tǒng)拉力型錨桿以及新型分布式承載體擴(kuò)大頭錨桿進(jìn)行內(nèi)力測試,分析這兩種錨桿的受力機(jī)理情況,分別通過不同加載方式,以及選擇不同應(yīng)變片,對錨桿內(nèi)力測試進(jìn)行研究,本文主要做了以下幾個方面的工作： 1、對拉力型錨桿受力機(jī)理以及特性進(jìn)行了理論分析,采用不同的傳感器對拉力型錨桿進(jìn)行內(nèi)力測試,同時(shí)記錄錨桿錨頭位移,對測試數(shù)據(jù)進(jìn)行處理,根據(jù)得出結(jié)果繪制出拉力型錨桿的軸力分布曲線、不同部位,錨桿軸力隨荷載變化曲線、錨桿側(cè)阻力分布曲線,對這些曲線進(jìn)行分析,得出拉力型錨桿的受力機(jī)理。 2、介紹分布式承載體·擴(kuò)大頭錨桿的特點(diǎn),采用不同的加載方式對分布式承載體·擴(kuò)大頭錨桿進(jìn)行內(nèi)力測試,同時(shí)記錄錨桿錨頭位移,對測試數(shù)據(jù)進(jìn)行處理,根據(jù)得出的結(jié)果繪制出拉力型錨桿的軸力分布曲線。通過對曲線進(jìn)行分析,得出分布式承載體·擴(kuò)大頭錨桿的受力機(jī)理。 3、從兩個不同的角度對錨桿內(nèi)力測試進(jìn)行了研究,一個為安裝不同的傳感器用同一種加載方式進(jìn)行試驗(yàn),另一個為安裝同一種傳感器用不同的加載方式進(jìn)行試驗(yàn)。 4、將錨桿最大荷載下的側(cè)阻力與行業(yè)規(guī)范取值相對比,驗(yàn)證了錨桿錨固段灌漿體與周邊地層之間極限粘結(jié)強(qiáng)度取值范圍。 本文兩組試驗(yàn)均為工程現(xiàn)場試驗(yàn),一方面試驗(yàn)成果可以工程中錨桿的使用提供理論指導(dǎo)；另一方面,通過不同的角度對錨桿內(nèi)力測試進(jìn)行研究,為工程界錨桿內(nèi)力測試提供了一定程度上的參考。
[Abstract]:Up to now, Anchorage technology has been used in engineering for more than 100 years, and geotechnical anchoring has become an important branch of geotechnical engineering, especially in the current economic construction, which requires speeding up the construction of traffic infrastructure. Therefore, it is necessary to build a large number of railway and highway tunnels. At the same time, the population of the city is increasing rapidly, and the urban area is constantly expanding, so it is imperative to develop and utilize the underground space in the city. Anchorage with anchor rod has a broad application prospect in geotechnical engineering construction in China. Compared with the extensive application of anchor rod in engineering, the research on bolt theory is lagging behind, and accidents caused by anchoring problems occur frequently in engineering. Therefore, it is necessary to study the working mechanism of Anchorage system in order to provide theoretical guidance for the use of Anchorage in engineering. In this paper, the internal force of the traditional tension anchor rod and the new distributed load-bearing anchor rod with enlarged head is tested, and the stress mechanism of the two kinds of anchors is analyzed, and the different strain gauges are selected through different loading modes, respectively. The main work of this paper is as follows: 1. The mechanical mechanism and characteristics of tension anchor are theoretically analyzed, and different sensors are used to test the internal force of tension anchor. At the same time, the displacement of anchor head is recorded, and the test data are processed. According to the result, the axial force distribution curve of tension anchor rod is drawn. Through the analysis of these curves, the mechanical mechanism of the tension anchor is obtained. 2. The characteristics of the extended head anchor of the distributed load-bearing body are introduced, and the internal force of the expanded head bolt of the distributed bearing body is tested by different loading methods. At the same time, the displacement of anchor head is recorded, the test data are processed, and the axial force distribution curve of tension anchor is drawn according to the obtained results. Through the analysis of the curve, the stress mechanism of the anchor rod with the enlarged head of the distributed bearing body is obtained. 3. The internal force test of the anchor rod is studied from two different angles. One used the same loading mode to install different sensors, the other used different loading modes to install the same sensor. The range of ultimate bond strength between grouting body and surrounding strata is verified. On the one hand, the test results can provide theoretical guidance for the use of anchor rod in engineering; on the other hand, through different angles, the internal force test of anchor rod is studied. It provides some reference for the internal force test of anchor rod in engineering field.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU476

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