在泰安的建筑工地，電梯門套安裝如同給建筑的 “交通樞紐” 定制合身的 “精裝外衣”，每一道工序都藏著講究。從測量時的 “毫米級較真” 到安裝后的 “無痕美顏”，施工人員用耐心與技巧，讓石材、金屬或木質板材在電梯門洞周圍 “嚴絲合縫”，既撐起通行的 “面子”，更筑牢耐用的 “里子”。

　　At the construction site in Tai'an, the installation of elevator door frames is like customizing a fitted "fine decoration coat" for the "transportation hub" of the building, with every process hidden with attention to detail. From the "millimeter level accuracy" during measurement to the "seamless beauty" after installation, construction personnel use patience and skill to ensure that stone, metal, or wooden panels are tightly fitted around the elevator door opening, not only supporting the "face" of passage, but also building a durable "lining".

　　施工前的準備是 “打底功夫”。工人們先清點工具包：精度 1mm 的鋼卷尺、誤差 ±1mm/m 的紅外線水平儀、帶金剛石鋸片的切割機必不可少，還有適配不同材料的膠粘劑 —— 石材用耐候膠、金屬用結構膠、木質用環保膠，以及 M6×60mm 的膨脹螺絲等。材料進場前 “三查”：查材質（大理石需無裂紋、鋁合金看噴涂厚度、實木復合板驗防潮層）、查尺寸（按門洞實測高度 2200-2400mm 核對）、查外觀（剔除色差大或缺角的板材）。若遇門洞墻體不平整（垂直度超 3mm 或平整度超 2mm），先用 1:2.5 水泥砂漿找平，養護 24 小時等干透再開工。

　　The preparation before construction is the 'foundation work'. The workers first counted the tool kit: a steel tape measure with an accuracy of 1mm, an infrared level with an error of ± 1mm/m, a cutting machine with diamond saw blades, and adhesives suitable for different materials - weather resistant adhesives for stone, structural adhesives for metal, environmentally friendly adhesives for wood, and M6 × 60mm expansion screws. Three checks before material entry: check the material (marble for cracks, aluminum alloy for spray thickness, solid wood composite board for moisture-proof layer), check the size (checked according to the measured height of the door opening from 2200-2400mm), and check the appearance (excluding boards with large color differences or missing corners). If the door opening wall is uneven (verticality exceeding 3mm or flatness exceeding 2mm), first use 1:2.5 cement mortar to level it, cure for 24 hours, and wait for it to dry before starting work.

　　測量放線堪稱 “定海神針”。施工人員從地面沿墻垂直向上，用鋼卷尺在門洞兩側標出門套頂部水平線，再用紅外線水平儀 “掃平”，確保兩側高度差不超 2mm。測寬度時在門洞上、中、下各量一次，取平均值算出門套單邊寬度（如門洞寬 1100mm，則單邊 550mm）。為保證垂直，用鉛垂線從頂部吊下，在地面畫出入墻 50mm 的基準線，左右對稱標好，像給門洞畫了個 “田字格”。石材門套還需提前規劃拼接縫位置，避開視線中心，在墻體標記預埋掛件點（間距≤600mm，距邊≥150mm），為后續固定打基礎。

　　Measuring and laying out can be called the 'sea fixing needle'. The construction personnel mark the horizontal line of the top of the door frame vertically upward along the wall from the ground, using a steel tape measure on both sides of the door opening, and then use an infrared level to "level" to ensure that the height difference between the two sides does not exceed 2mm. When measuring the width, they measure the top, middle, and bottom of the door opening once each, and take the average to calculate the width of one side of the door frame (if the door opening is 1100mm wide, then 550mm on one side). To ensure verticality, hang a plumb line from the top and draw a 50mm reference line for the entrance and exit walls on the ground. Mark it symmetrically on both sides, as if drawing a "field grid" for the door opening. Stone door frames also need to plan the joint positions in advance, avoiding the center of the line of sight. Pre embedded hanging points should be marked on the wall (spacing ≤ 600mm, distance from the edge ≥ 150mm) to lay the foundation for subsequent fixation.

　　材料加工講究 “因材施藝”。石材用橋式切割機按線切割（誤差≤1mm），切口用角磨機倒 45° 小角（深 2-3mm）防崩裂，再用 300 目砂輪片打磨光滑；鋁合金板用數控切割機下料，修邊器處理毛邊至無刺手；木質復合板用推臺鋸精準切割，切口刷防潮封邊漆。加工好的板材按 “左、右、上” 編號，背面用油性筆標注尺寸，堆放在離地 10cm 的木方上，防受潮變形。石材拼接前在地面 “試裝”，調平縫寬至 2-3mm，用記號筆標記對應位置，避免安裝時出錯。

　　Material processing emphasizes the principle of "applying art according to the material". Stone is cut by a bridge type cutting machine according to the line (error ≤ 1mm), and the cut is made by using an angle grinder to invert a small angle of 45 ° (2-3mm deep) to prevent cracking, and then polished smooth with a 300 mesh grinding wheel; Aluminum alloy plates are cut using a CNC cutting machine, and edge trimmers are used to remove burrs until there are no burrs; The wooden composite board is precisely cut with a push table saw, and the cut is coated with moisture-proof edge sealing paint. The processed boards are numbered "left, right, top", and the back is marked with an oil pen to indicate the size. They are stacked on a wooden square 10cm above the ground to prevent moisture and deformation. Before splicing the stone, conduct a trial installation on the ground, adjust the joint width to 2-3mm, and mark the corresponding position with a marker pen to avoid errors during installation.

　　安裝固定是 “體力 + 技術” 活。石材門套先在標記點鉆孔（深 60mm），植入膨脹螺絲固定 L 型不銹鋼掛件（厚 3mm），用墊片調平掛件表面至基準線。板材背面抹 5-8mm 厚石材膠，對準掛件貼合，輕敲使膠層均勻，用水平尺校垂直度（偏差≤2mm），底部和兩側塞木楔臨時固定。金屬門套則先裝 U 型卡槽（間距 400mm），卡入金屬板后用自攻螺絲固定（間距 300mm），螺絲帽蓋同色蓋帽。木質門套需先釘 18mm 多層板基層（膨脹螺絲間距 500mm），再涂結構膠貼飾面板，邊緣用蚊釘（間距 100mm）加固，釘眼批膩子補平。上門套板由兩人抬放，用 4mm 厚角碼與兩側板連接，確保頂部水平、接縫緊密。

　　Installing and fixing is a combination of physical and technical labor. Drill holes (60mm deep) at the marked points for the stone door frame, insert expansion screws to fix the L-shaped stainless steel pendant (3mm thick), and use washers to level the surface of the pendant to the reference line. Apply 5-8mm thick stone adhesive on the back of the board, align it with the pendant, tap lightly to make the adhesive layer uniform, use a level ruler to calibrate the verticality (deviation ≤ 2mm), and temporarily fix the bottom and both sides with wooden wedges. The metal door frame is first installed with U-shaped card slots (spaced 400mm apart), and then fixed with self tapping screws (spaced 300mm apart) after being inserted into the metal plate. The screw cap is covered with a colored cap. Wooden door frames need to be nailed with 18mm multi-layer board base (expansion screw spacing 500mm) first, and then coated with structural adhesive to decorate the panel. The edges should be reinforced with mosquito nails (spacing 100mm), and the nail holes should be filled with putty. The upper door cover board is lifted and placed by two people, and connected to the two side boards with 4mm thick corner brackets to ensure that the top is horizontal and the joints are tight.

　　縫隙處理是 “美顏關鍵”。石材縫用同色耐候膠填充，高于表面 2mm，固化后用刀片刮平，再用 3000 目砂紙拋光至 “隱形”；金屬縫打中性硅酮膠，刮膠板修出 1mm 深凹縫，防積灰；木質縫若留 5mm 工藝縫，清灰后刷同色面漆，密拼縫則用木膠填實。門套與墻體間 5-10mm 的空隙，用發泡膠填滿，4 小時后修平，表面打密封膠防水。整個過程像給門套 “化妝”，讓縫隙成為看不見的 “細節”。

　　Gap treatment is the key to beauty. Fill the stone joints with weather resistant adhesive of the same color, 2mm above the surface. After curing, scrape flat with a blade and polish with 3000 grit sandpaper until "invisible"; Apply neutral silicone adhesive to the metal seam, and create a 1mm deep concave seam with a scraping board to prevent dust accumulation; If a 5mm process joint is left in the wooden joint, it should be cleaned and coated with the same color paint, and the tight joint should be filled with wood glue. Fill the gap of 5-10mm between the door frame and the wall with foam adhesive, level it after 4 hours, and apply sealant to the surface for waterproofing. The whole process is like applying makeup to the door frame, making the gaps invisible details.

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