本文選題：控制加載爆炸擠淤置換法　切入點(diǎn)：穩(wěn)定性　出處：《北京交通大學(xué)》2014年碩士論文

【摘要】：控制加載爆炸擠淤置換法(簡(jiǎn)稱爆炸擠淤置換法)具有人力消耗少、施工簡(jiǎn)便、工期短、投資省等優(yōu)點(diǎn),被廣泛應(yīng)用于大型的港口工程建設(shè)和圍墾工程中,但對(duì)其所筑堤壩的穩(wěn)定性分析,還缺乏成熟的方法。因此及時(shí)開(kāi)展爆炸擠淤置換法堆石壩地基變形和破壞機(jī)理的研究,建立能夠有效分析堤壩穩(wěn)定性的方法,具有重大的工程實(shí)用價(jià)值。 本文遵循查閱相關(guān)文獻(xiàn)—建立計(jì)算模型—開(kāi)發(fā)分析軟件—分析結(jié)果與常用分析方法對(duì)比的技術(shù)路線。主要工作和結(jié)論如下： (1)在大量文獻(xiàn)調(diào)研的基礎(chǔ)上,分析了爆炸擠淤置換法的成壩機(jī)理。該法不是改善和提高淤泥軟基的自身承載力,而是通過(guò)堆石體的自重作用和爆炸沖擊作用擠淤,實(shí)現(xiàn)泥石置換。堆石體既是堤身材料又是地基材料,提高了壩體的穩(wěn)定性。 (2)以土體極限平衡理論為基礎(chǔ),從兩個(gè)角度出發(fā)推導(dǎo)評(píng)估了專門針對(duì)爆炸擠淤堆石壩穩(wěn)定性的計(jì)算公式。首次提出了適合于爆炸擠淤堆石壩的最危險(xiǎn)滑面搜索方法以及重要參數(shù)滑面長(zhǎng)度L和堆石滑體重度w的計(jì)算方法,建立了專門分析爆炸擠淤堆石壩的計(jì)算模型。 (3)梳理清各公式之間的邏輯關(guān)系,使用計(jì)算機(jī)語(yǔ)言Microsoft Visual C#,在Visual Studio編程開(kāi)發(fā)平臺(tái)上,結(jié)合Access數(shù)據(jù)庫(kù)開(kāi)發(fā)了爆炸擠淤堆石壩穩(wěn)定性分析軟件(Versionl.0),簡(jiǎn)稱GRMCLB-ST (Ver.1.0)。 (4)利用自己開(kāi)發(fā)的爆炸擠淤堆石壩穩(wěn)定性分析軟件(Version1.0)算得的安全系數(shù)比其它四種常用土體極限平衡理論算得的值更能反映堆石壩的實(shí)際狀態(tài),它在分析斷面形狀復(fù)雜、處于深厚淤泥中的爆炸擠淤堆石壩穩(wěn)定性時(shí)更加具有優(yōu)勢(shì)。 (5)從爆炸擠淤堆石壩穩(wěn)定性分析軟件(Version1.0)和四種常用極限平衡理論算得的滑動(dòng)面位置看,堆石壩發(fā)生破壞時(shí),破壞面的終點(diǎn)一般在堆石壩底邊上。 (6)考慮淤泥的粘聚力隨深度增加時(shí)算得的安全系數(shù)比不考慮淤泥的粘聚力隨深度增加時(shí)算得的值提高較多,驗(yàn)證了爆炸擠淤堆石壩利用了深層淤泥強(qiáng)度較高的特性。
[Abstract]:To control the loading of blasting replacement method (referred to as blasting replacement method) with human consumption, simple construction, short construction period, investment and other advantages, is widely used in large-scale port construction and reclamation project, but the analysis on the stability of the dam built by the lack of mature research methods. So timely to carry out the blasting replacement method of dam foundation deformation and failure mechanism, establish effective method of dam stability analysis, has great practical value.
In this paper, we consulted the relevant documents, set up the calculation model, develop the analysis software, analyze the results and compare with the commonly used analysis methods. The main work and conclusions are as follows:
(1) on the basis of literature research, analysis of the mechanism of dam blasting replacement method. The bearing capacity of the law is to improve and enhance the soft foundation, but by gravity and explosive compaction of rockfill compaction, realize debris replacement. Rockfill material is both dike the foundation material, improve the stability of the dam.
(2) in soil based on limit equilibrium theory, derived from the two aspects of evaluation formula for explosive compaction of rockfill dam stability is proposed for the first time. The most dangerous sliding surface suitable for explosive compaction of rockfill dam search method and important parameters of sliding surface length L and rockfill slip calculation method of severe W, set up a special analysis calculation model of explosive compaction of rockfill dam.
(3) combing the logical relationship between the formulas, using computer language Microsoft Visual C#, on the Visual Studio programming development platform, combined with Access database, we developed the explosive compaction rock fill dam stability analysis software (Versionl.0), referred to as GRMCLB-ST (Ver.1.0).
(4) the own development of the explosive compaction of rockfill dam stability analysis software (Version1.0) is the actual state of the safety coefficient can reflect the dam than the other four commonly used the limit equilibrium theory is more complex, it in the analysis section, in deep silt in explosive compaction of rockfill dam stability has more advantages.
(5) from the location of the sliding surface calculated by the Version1.0 software and the four commonly used limit equilibrium theories, when the rockfill dam is destroyed, the end of the failure surface is usually on the bottom edge of the rockfill dam.
(6) considering the cohesive force of silt as the depth increases, the safety factor calculated is much higher than that calculated without considering the cohesive force of silt with depth increasing. It is verified that the characteristics of deep silt with high strength are achieved by explosive compaction.

【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV641.4

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