The complexity of long-span steel structure and the diversity of construction methods are the problems that must be considered in the design. This is an aspect that is often ignored or poorly considered in the design process. The construction mainly includes the following installation technologies. During the construction, the following problems should be paid attention to: the installation of complex space steel structure should be measured and controlled. As measurement and control is a part of steel structure construction technology, its construction scheme is reasonable and advanced. Through a large number of measurement and control data, the results are analyzed and verified. For long-span steel structure, due to the large difference of deformation and stress state in the construction process and after forming, it is necessary to use a variety of supporting tires to ensure the accuracy of the structure.

　　1.即拆卸控制

　　1. Disassembly control

　　由于大跨度鋼結(jié)構(gòu)總卸貨噸位大、分布廣泛的卸貨點(diǎn),單點(diǎn)卸載壓力,卸貨工作負(fù)載的計(jì)算和分析,如大,如果不合理的支持力量的釋放,將會(huì)破壞結(jié)構(gòu)或使腳手架逐漸穩(wěn)定。因此,卸貨的鋼結(jié)構(gòu)必須進(jìn)行嚴(yán)格按照兩個(gè)卸載方法的要求,等于比率法和等距離法,基于結(jié)構(gòu)的計(jì)算和分析,針對(duì)結(jié)構(gòu)的,以變形協(xié)調(diào)為核心,實(shí)時(shí)監(jiān)控保證。

　　Due to the large tonnage and wide distribution of unloading points, single point unloading pressure and calculation and analysis of unloading working load of large-span steel structure, if the unreasonable support force is released, the structure will be damaged or the scaffold will be gradually stable. Therefore, the unloading steel structure must be strictly in accordance with the requirements of the two unloading methods, equal to the ratio method and the equal distance method. Based on the calculation and analysis of the structure, aiming at the safety of the structure, the deformation coordination is the core and real-time monitoring is guaranteed.

　　2.提升方案

　　2. Improvement plan

　　大跨度鋼梁吊裝,如果沒(méi)有合理的吊點(diǎn)計(jì)算,仍然選擇傳統(tǒng)的兩段,由于鋼結(jié)構(gòu)較長(zhǎng),吊點(diǎn)間距較大,重量和可變負(fù)荷等因素,鋼梁和鋼絲繩的軸向力很大,容易梁橫向彎曲,甚更嚴(yán)重的變形。

　　For the hoisting of long-span steel beams, if there is no reasonable calculation of lifting points, the traditional two sections are still selected. Due to the long steel structure, large distance between lifting points, weight and variable load and other factors, the axial force of steel beams and steel wire ropes is very large, which makes it easy for the beams to bend laterally or even to deform more seriously.

　　鋼結(jié)構(gòu)畫廊

　　Steel structure Gallery

　　加強(qiáng)大跨度鋼結(jié)構(gòu)施工現(xiàn)場(chǎng)，增加對(duì)施工人員的知識(shí)培訓(xùn)，使其對(duì)鋼構(gòu)件的力學(xué)特性和吊裝知識(shí)有更具體的了解。同時(shí)加強(qiáng)施工組織設(shè)計(jì)對(duì)吊裝方案進(jìn)行合理論證，以選擇更合理的吊裝方案。

　　Strengthen the construction site of large-span steel structure, increase the professional knowledge training of construction personnel, so that they have a more specific understanding of the mechanical characteristics of steel members and lifting knowledge. At the same time, strengthen the construction organization design to carry on the reasonable demonstration to the hoisting scheme, in order to choose the more reasonable hoisting scheme.

　　鋼桁架

　　Steel truss

　　3安裝順序

　　3 installation sequence

　　由于大跨度鋼結(jié)構(gòu)對(duì)安裝順序的要求較高，如果安裝順序考慮不當(dāng)，鋼構(gòu)件不滿足吊裝的需要，可能會(huì)影響結(jié)構(gòu)的。在施工組織設(shè)計(jì)中，合理安排安裝順序，統(tǒng)一協(xié)調(diào)工廠加工、構(gòu)件運(yùn)輸和現(xiàn)場(chǎng)安裝。在施工過(guò)程中，要嚴(yán)格執(zhí)行。除了認(rèn)真制定適合本工程的安裝順序外，還應(yīng)選擇有經(jīng)驗(yàn)的施工隊(duì)伍進(jìn)行安裝，避免潛在的質(zhì)量隱患。

　　Due to the high requirements of large-span steel structure on the installation sequence, if the installation sequence is not considered properly, the steel members do not meet the needs of hoisting, which may affect the safety of the structure. In the construction organization design, reasonably arrange the installation sequence, and coordinate the factory processing, component transportation and site installation. In the process of construction, it shall be strictly implemented. In addition to carefully formulating the installation sequence suitable for the project, experienced construction team shall be selected for installation to avoid potential quality hazards.

　　大跨度鋼結(jié)構(gòu)廣泛應(yīng)用于具體工程項(xiàng)目中。針對(duì)施工過(guò)程中出現(xiàn)的各種問(wèn)題，加強(qiáng)施工組織和設(shè)計(jì)的優(yōu)化，強(qiáng)化質(zhì)量紅線，不斷提高施工工藝。

　　Large span steel structure is widely used in specific projects. In view of various problems in the construction process, strengthen the optimization of construction organization and design, strengthen the red line of safety and quality, and constantly improve the construction technology.

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