本文選題：基樁　切入點(diǎn)：檢測(cè)　出處：《山東大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：自平衡法靜載試驗(yàn)是一種新型的基樁承載力測(cè)試方法,其充分利用樁的摩擦力與端阻力作為一對(duì)平衡力的基本原理,在大噸位超長(zhǎng)樁的承載力檢測(cè)時(shí)基本不受承載力和場(chǎng)地條件的限制,同時(shí),能夠提供多方面的試驗(yàn)數(shù)據(jù),拓展了基樁靜載試驗(yàn)的應(yīng)用范圍、降低了試驗(yàn)成本、提高了試驗(yàn)過(guò)程安全度。本文簡(jiǎn)要的闡述了分析和研究自平衡法靜載試驗(yàn)及其試驗(yàn)加載設(shè)備荷載箱的意義,國(guó)內(nèi)外的發(fā)展現(xiàn)狀：敘述分析了基樁不同試驗(yàn)方法的荷載傳遞機(jī)理,自平衡法靜載試驗(yàn)的基本原理,各種等效轉(zhuǎn)換方法,平衡點(diǎn)的確定和荷載箱的埋設(shè)等；重點(diǎn)在于自平衡法靜載試驗(yàn)設(shè)備荷載箱的改良研究和實(shí)際工程應(yīng)用。荷載箱是進(jìn)行自平衡法靜載試驗(yàn)的關(guān)鍵核心設(shè)備,其設(shè)計(jì)和產(chǎn)品質(zhì)量直接影響自平衡法靜載試驗(yàn)的檢測(cè)結(jié)果。由于傳統(tǒng)荷載箱上、下面處容易滯留浮漿等不良介質(zhì)造成該部位樁身混凝土質(zhì)量不均,加載時(shí),導(dǎo)致荷載箱上、下面處應(yīng)力應(yīng)變復(fù)雜,變形不均,進(jìn)而導(dǎo)致安裝于荷載箱上下面處的位移觀測(cè)裝置測(cè)量到的觀測(cè)值與樁身實(shí)際的應(yīng)力應(yīng)變值嚴(yán)重不符,且荷載箱部位容易侵入雜質(zhì),影響后期注漿加固效果,同時(shí),傳統(tǒng)荷載箱存在現(xiàn)場(chǎng)安裝程序復(fù)雜,加固困難等問題。為克服傳統(tǒng)荷載箱的上述技術(shù)缺陷,提高荷載箱的質(zhì)量和性能,本文對(duì)于荷載箱的改良,重點(diǎn)研究?jī)?nèi)容為：低油壓高出力頂、特殊設(shè)計(jì)筒式結(jié)構(gòu)、位移裝置、觀測(cè)點(diǎn)的位置布置、荷載箱部位聲測(cè)管的連接、試驗(yàn)后高壓注漿等方面的研究。并且,通過(guò)工程實(shí)例,將改良設(shè)計(jì)和生產(chǎn)的荷載箱-基樁軸向自反力測(cè)試筒式荷載箱與傳統(tǒng)荷載箱在同條件下進(jìn)行試驗(yàn)比對(duì),驗(yàn)證其設(shè)計(jì)目的和產(chǎn)品質(zhì)量性能。經(jīng)工程試樁檢驗(yàn)驗(yàn)證,本文所述基樁軸向自反力測(cè)試筒式荷載箱在同等條件下具有低油壓高出力、試驗(yàn)荷載維持正常、位移觀測(cè)點(diǎn)布置合理、試驗(yàn)測(cè)試數(shù)據(jù)準(zhǔn)確、聲測(cè)管連接合理和試驗(yàn)后注漿加固效果顯著等優(yōu)勢(shì)。同時(shí),基樁軸向自反力測(cè)試筒式荷載箱,獲得了實(shí)用新型專利證書,證書號(hào)：ZL201420192943.4；目前,該荷載箱已在多個(gè)工程項(xiàng)目中推廣使用,均圓滿的完成了試驗(yàn)任務(wù)。最后,總結(jié)論證自平衡法靜載試驗(yàn)檢測(cè)數(shù)據(jù)和分析結(jié)果,指出基樁軸向自反力測(cè)試筒式荷載箱的設(shè)計(jì)合理、質(zhì)量可靠,將隨著自平衡檢測(cè)技術(shù)法發(fā)展,逐漸被認(rèn)可和推廣應(yīng)用。
[Abstract]:Self-balance static load test is a new method for testing the bearing capacity of pile, which makes full use of friction force and end resistance of pile as the basic principle of a pair of equilibrium forces. The bearing capacity of super-long pile with large tonnage is not limited by bearing capacity and site condition. At the same time, it can provide a variety of test data, expand the application scope of pile static load test, and reduce the test cost. In this paper, the significance of analyzing and studying the static load test of self-balancing method and the load box of the test equipment is briefly described. The development situation at home and abroad is described. The load transfer mechanism of different test methods of foundation pile is described and analyzed. The basic principle of static load test by self-balance method, various equivalent conversion methods, the determination of equilibrium point and the installation of load box, etc. The emphasis is on the improvement research and practical engineering application of load box, which is the key equipment for self-balancing static load test. Its design and product quality directly affect the test results of static load test by self-balancing method. Because of the poor media such as floating slurry and other bad media in the traditional load box, the quality of pile body concrete in this part of the pile is uneven, and when loading, it leads to the loading box. The stress and strain at the bottom of the pile are complicated and the deformation is uneven, which leads to the measurement of displacement at the bottom of the load box that is seriously inconsistent with the actual stress and strain value of the pile body, and the load box is prone to intrude into the impurity. In order to overcome the technical defects of the traditional load box and improve the quality and performance of the load box, the improvement of the load box is made in this paper, in order to overcome the technical defects of the traditional load box and improve the quality and performance of the load box, in order to overcome the technical defects of the traditional load box, improve the quality and performance of the load box, The main research contents are as follows: low oil pressure and high output roof, specially designed cylinder structure, displacement device, location arrangement of observation point, connection of acoustic tube in load box, high pressure grouting after test and so on. This paper compares the improved design and production of the load box with the traditional load box under the same conditions, and verifies the design purpose and the quality performance of the product, which is verified by the engineering pile test. The axial self-reflexive force of the pile in this paper has low oil pressure and high output force under the same conditions, the test load remains normal, the displacement observation points are arranged reasonably, and the test data are accurate. At the same time, the pile axial self-reflexive force test bobbin load box, obtained the utility model patent certificate, certificate no.: ZL201420192943.43.4; at present, the foundation pile axial self-reaction test cylinder load box has obtained the utility model patent certificate, the certificate number: ZL201420192943.43.4. The load box has been widely used in many engineering projects and has successfully completed the test task. Finally, the test data and analysis results of static load test by self-balance method are summarized and demonstrated. It is pointed out that the design of the pile axial self-reaction test cylindrical load box is reasonable. With the development of self-balanced detection technology, quality and reliability will be accepted and popularized.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU473.16

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