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在我国城镇供热管网敷设中,直埋技术的应用始于上世纪80年代引进北欧国家的预制成品保温管。随着时代的发展、技术的进步以及城市建设的需要,热力管道的直埋敷设现已越来越多地应用于城镇热网的建设中,特别是近几年得到迅猛的发展。因为与传统的地上敷设和管沟敷设方式相比,直埋敷设有其诸多优点,如保温效率高,节能效益显著,可减少热损失14%～19%;占地少,不影响市政规划;减少污染:尤其在地下管网和障碍物多的地区施工,往往是管沟通不过,直埋管道则能通过;安装方便,施工工期短;使用寿命长,维护费用低;不影响城市景观等。然而,保温管直埋敷设与地上敷
In the laying of urban heating pipe network in China, the application of direct burial technology began with the prefabricated finished pipe insulation introduced into the Nordic countries in the 1980s. With the development of the times, the progress of technology and the need of urban construction, the direct laying of heat pipes has been increasingly used in the construction of heat network in cities and towns, especially in recent years it has been developed rapidly. Because compared with the traditional laying of the ground and trench ditch laying, burial has many advantages, such as high thermal insulation efficiency, significant energy saving, heat loss can be reduced by 14% to 19%; small footprint, does not affect the municipal planning; Reduce pollution: especially in the underground pipe network and obstacles in many areas of construction, often through pipe communication, but can be buried through the pipeline; easy installation, short construction period; long service life, low maintenance costs; does not affect the urban landscape. However, the insulation pipe buried laying and the ground apply