The roof insulation and waterproof materials of some large public buildings mostly use foam composite color steel plate or other lightweight materials, but the use of foam composite color steel plate is also not applicable. For example, the joints and node treatment of color steel composite plates should be bonded with adhesive and have exposed nail holes on the top surface. This has certain shortcomings in terms of service life and rainproof effect, and is also limited in terms of roof design. For example, the roof structure of the ball stadium is steel grid, light steel purlin, and foam composite color steel plate roof. The roof is curved in length and flat in width, with a length of 79m and a width of 26m. The roof has a waterproof area of 4000 square meters and is centrally drained.

用工廠復合板做成弧形屋面有一定困難。復合板接頭很難嚴實合縫，尤其用膠粘合很難保證不漏。復合板經熱脹冷縮，膠口必然會開裂而滲漏，維修時很難找到開裂部位。復合板一塊一塊拼接起來，很難做成弧面，只能做成折面，難以達到設計和使用要求。要達到屋面弧形造型、不滲不漏，必須減少接口或無接口，屋面必須無明釘孔。如有接口，必須高出頂板底平面，使接口處不被水浸泡。用復合板做屋面防水層，很難做到以上幾點。

There are certain difficulties in using factory composite panels to make curved roofs. Composite board joints are difficult to tightly seal, especially when glued together, it is difficult to ensure no leakage. The composite plate will inevitably crack and leak due to thermal expansion and contraction, making it difficult to find the cracked area during maintenance. Composite boards are pieced together one by one, making it difficult to create curved surfaces and can only be made into folded surfaces, making it difficult to meet the design and usage requirements. To achieve a curved roof shape with no seepage or leakage, it is necessary to reduce or have no interfaces, and the roof must have no exposed nail holes. If there is an interface, it must be higher than the bottom plane of the top plate to prevent the interface from being soaked in water. It is difficult to achieve the above points when using composite boards as roof waterproofing layers.

一、施工方法

1、 Construction methods

建議不用工廠復合板。將屋面板改為結構層、保溫層、防水層分開來做（也叫現場復合）。

It is recommended not to use factory composite boards. Change the roof panel to a structural layer, insulation layer, and waterproof layer separately (also known as on-site composite).

(1)先在檁條上做結構層(底層彩鋼板)，用自攻釘將其固定在檁條上，接口處用鉚釘拉牢。

(1) First, make a structural layer (bottom color steel plate) on the purlin, fix it on the purlin with self tapping nails, and secure the interface with rivets.

(2)在底板上做保溫層，用塑料袋將超細玻璃棉裝起來密封。在保溫層中間加輕鋼龍骨，使其固定在檁條 上。在龍骨與檁條間加橡膠隔熱層，以防出現熱橋，使其承擔起彩鋼板防水層的荷載。

(2) Make an insulation layer on the bottom plate and seal it with ultrafine glass wool in a plastic bag. Add a light steel keel in the middle of the insulation layer to fix it on the purlin. Add a rubber insulation layer between the keel and purlins to prevent the occurrence of thermal bridges and enable them to bear the load of the top layer of color steel plate waterproof layer.

(3)做防水層。彩鋼板防水層，采用整板上房，在地面將彩鋼板擠壓成型后，按屋面79m長度切斷，79m中間不留接頭，，不留施工縫。這樣在縱向就無接口，橫向接口高出頂板底面。在接口槽內加橡膠墊片，將接口密封起來，以使接口嚴密又不被水浸泡。頂板與龍骨的連接件扣在接口槽內，使其起到連接和支撐作用，做到頂板無明釘孔。在屋面頂板的邊緣節點處做滴水檐，用自攻釘將其固定在邊緣的檁條上。頂板與連接板間加橡膠片，用鉚釘拉牢，起到防風作用。按此法施工使屋面結構起到了承載、保溫、防水、防風的作用，同時滿足了設計的弧形頂面造型。

(3) Finally, make a waterproof layer. The top layer of the color steel plate waterproof layer is made of whole boards. After the color steel plate is extruded and formed on the ground, it is cut according to the length of 79m on the roof, with no joints or construction joints left in the middle of 79m. In this way, there is no interface in the vertical direction, and the horizontal interface is higher than the bottom surface of the top plate. Add rubber gaskets in the interface slot to seal the interface tightly and prevent it from being soaked in water. The connection between the top plate and the keel is fastened in the interface slot to provide connection and support, ensuring that there are no exposed nail holes on the top plate. Make drip eaves at the edge nodes of the roof slab and fix them on the purlins at the edges with self tapping screws. Add rubber sheets between the top plate and the connecting plate, and rivet them firmly to prevent wind. This method of construction enables the roof structure to play a role in load-bearing, insulation, waterproofing, and wind resistance, while also meeting the design's curved top shape.

二、施工中需要注意的問題

2、 Issues to be noted during construction

(1)彩鋼板底板(結構層)必須在檁條上固定牢固，并且不能承擔施工荷載，施工荷載要由檁條來承擔。

(1) The color steel plate bottom plate (structural layer) must be firmly fixed on the purlins and cannot bear the construction load. The construction load must be borne by the purlins.

(2)保溫層超細玻璃棉必須用塑料袋裝起來密封。超細玻璃棉袋裝前不能受潮，裝袋后要密封好，使其不 能進水，保持干燥，施工中注意避免塑料袋破損，以保證其保溫效果。

(2) The ultra-fine glass wool insulation layer must be sealed with plastic bags. Ultra fine glass wool bags should not be affected by moisture before packaging, and should be sealed well after packaging to prevent water from entering and keep them dry. During construction, attention should be paid to avoiding damage to the plastic bags to ensure their insulation effect.

(3)龍骨與底板連接處必須加隔離層，以保證不出現熱橋結露現象。

(3) An isolation layer must be added at the connection between the keel and the bottom plate to ensure that there is no condensation of the thermal bridge.

(4)頂板整板上房要注意天氣，有風天不能施工，防止彩鋼板被風折損。

(4) Pay attention to the weather when installing the entire roof panel in the house. Construction cannot be carried out on windy days to prevent the color steel plate from being damaged by the wind.

(5)接口處一定要加密封條，連接件一定要安裝到位，不能出現明釘孔。

(5) Sealing strips must be encrypted at the interface, and the connectors must be installed in place without any exposed nail holes.

(6)邊緣和節點處一定要用自攻釘、鉚釘固定牢固。

(6) The edges and nodes must be firmly fixed with self tapping screws and rivets.

三、效果

3、 Effect

采用彩鋼板整板上房施工工藝可減少屋面頂板接頭，無明釘孔；使流水面無縫，做到屋面板不滲不漏；達到了公共建筑的大跨度、大空間、體輕、保溫性能好、防水效果好的技術要求；真正做到屋面結構堅固耐久；經濟效果較好。

The use of color steel plate whole board construction technology can reduce the number of roof joints without exposed nail holes; Make the water surface seamless and ensure that the roof panel does not leak or leak; Meet the technical requirements of large span, large space, light weight, good insulation performance, and good waterproof effect of public buildings; Truly achieving sturdy and durable roof structures; The economic effect is good.