本文選題：斜拉橋 + 雙套拱塔　； 參考：《石家莊鐵道大學(xué)》2015年碩士論文

【摘要】：本文以宜興荊邑大橋?yàn)楣こ虒?shí)例,針對(duì)荊邑大橋大溪河鋼箱梁雙套拱斜拉橋雙套拱塔提升中的主要施工技術(shù)進(jìn)行了深入的總結(jié)研究。通過現(xiàn)場(chǎng)條件分析及方案研究,確定采用液壓同步提升系統(tǒng)對(duì)雙套拱塔進(jìn)行豎轉(zhuǎn)提升方案,即先利用臨時(shí)塔架豎轉(zhuǎn)提升主塔,然后利用主塔作為承重結(jié)構(gòu),同步豎轉(zhuǎn)提升副塔就位。該方案工藝先進(jìn),具有安裝工期短、拱塔質(zhì)量易于控制、節(jié)約臨時(shí)設(shè)備及機(jī)械的投入、結(jié)構(gòu)安全更易保證等優(yōu)點(diǎn)。豎轉(zhuǎn)施工中臨時(shí)塔架結(jié)構(gòu)的安全、穩(wěn)定性至關(guān)重要,為了更加有效的確保了豎轉(zhuǎn)提升施工的成功進(jìn)行,采用對(duì)門式塔架整體穩(wěn)定性、門式塔架基礎(chǔ)、門式塔架后拉穩(wěn)定索、門式塔架后拉基礎(chǔ)、主塔轉(zhuǎn)鉸及吊點(diǎn)、副塔轉(zhuǎn)絞及吊點(diǎn)等主要及關(guān)鍵部位分別進(jìn)行專門設(shè)計(jì)和有限元計(jì)算分析,確保了豎轉(zhuǎn)提升構(gòu)件性能滿足提升施工的各項(xiàng)需要。主要通過鋼絞線將鋼拱塔構(gòu)件上的各吊點(diǎn)與對(duì)應(yīng)的液壓提升器連接起來、再利用電腦控制各液壓提升器同步動(dòng)作將鋼拱塔提升到位,是同步豎轉(zhuǎn)提升施工技術(shù)的關(guān)鍵。液壓提升器采用穿芯式構(gòu)造形式,其兩端楔型錨具有單個(gè)方向自動(dòng)鎖定功能,在錨具運(yùn)行工作工程中,鋼絞線會(huì)被自動(dòng)鎖緊,在錨具不運(yùn)行工作即處于放松狀態(tài)下,鋼絞線會(huì)被放開可上下自由活動(dòng);同時(shí)提升索具采用用鋼絞線。因此豎轉(zhuǎn)提升技術(shù)安全能夠得到保證、且承重構(gòu)件安裝運(yùn)輸便利、自身重量輕、中間不需要鑲接等獨(dú)特的優(yōu)點(diǎn)。通過主、副鋼拱塔正常豎轉(zhuǎn)提升證明,鋼拱塔安裝主要施工技術(shù)安全、可靠、施工便利、安裝質(zhì)量精度易于控制,對(duì)相同工況下同類工程施工有良好的指導(dǎo)借鑒作用。
[Abstract]:Taking the Jingyi Bridge in Yixing as an engineering example, this paper makes a deep summary and study on the main construction technology of the double-set arch tower hoisting of the steel box girder double-set arch cable-stayed bridge of Jingyi Bridge. Through field condition analysis and project research, it is determined to adopt hydraulic synchronous lifting system to carry out vertical lifting scheme for double sets of arch tower, that is, to use temporary tower to vertical lift main tower first, and then to use main tower as load-bearing structure. Synchronous vertical hoisting of secondary tower in position. This scheme has the advantages of advanced technology, short installation period, easy quality control of arch tower, saving the input of temporary equipment and machinery, and easy guarantee of structural safety. The safety and stability of temporary tower structure are very important in vertical construction. In order to ensure the successful construction of vertical tower, the overall stability of portal tower, the foundation of gate tower, and the stable cable behind gate tower are adopted. The special design and finite element analysis are carried out on the main and key parts of the rear pull foundation of the portal tower, the main tower hinge and the lifting point, the auxiliary tower rotation hinge and the lifting point, respectively, which ensure that the performance of the vertical hoisting member can meet the requirements of the hoisting construction. The hoisting points on the steel arch tower members are connected with the corresponding hydraulic hoists through steel strands, and then the steel arch towers are hoisted in place by computer control, which is the key to the construction technology of synchronous vertical hoisting. The hydraulic hoist adopts the structure of piercing core, and its two end wedge-shaped anchors have the function of automatic locking in a single direction. In the working engineering of the anchors, the steel strands will be automatically locked, and the anchors will be in a relaxed state if the anchors are not in operation. Steel strands will be free to move up and down, while hoisting rigging uses steel strands. Therefore, the safety of vertical lifting technology can be guaranteed, and the load-bearing components are easy to install and transport, their own weight is light, and there is no need to insert in the middle of the unique advantages. Through the normal vertical hoisting of the steel arch tower, it is proved that the main construction technology of the steel arch tower is safe, reliable, easy to construct and easy to control the quality of installation, which can be used as a good guide for the construction of similar projects under the same working conditions.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4

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