Abstract: It is necessary to innovate a more suitable mode of public service facility supply and layout in mountain villages to solve the present low coverage, low standards, and low efficiency. Research based on the life circle theory agrees with the scattered distribution of mountain residents. Based on the characteristics of terrain complexity and the particularity of residents' lives in mountainous regions, it becomes necessary to define a hierarchical and orderly life circle system based on the residents' travel willingness and daily life needs.
　　A case study based on Banqiao Town, Yongchuan District, Chongqing was conducted by combining geographical data, traffic vector data, POI, mobile phone signaling data, and questionnaire interview data. The current situation of life circles in Banqiao Town was analyzed microscopically from the perspectives of living characteristics of villagers, spatial characteristics of public facilities, and demand characteristics of public facilities. Results show that residential life in Banqiao Town is closed-off, public facilities are distributed in clusters, and residents' demands for different functional facilities vary significantly. On this basis, three factors influencing the life circle pattern were extracted; these include service content, traffic time, and service quality.
　　Based on Maslow's Hierarchy of Needs, residents' life circles in Banqiao Town were divided into three categories: basic life circle, hierarchical life circle, and opportunity life circle. These three categories meet the needs of basic security, quality improvement, and advanced services, respectively. The life circles at different levels correspond to different service contents, traffic time, and service quality. Facilities with high use intensity or small acceptable accessible distance are arranged in the low-level life circle layer, while facilities with low use intensity or large acceptable accessible distance are arranged in the high-level life circle layer. The service contents of different circle layers were determined based on current demands for facilities by residents in Banqiao Town. The service radius of each circle is determined based on the ideal distance for local residents to access to different facilities. The "quality" and "quantity" of the life circle layers were matched based on local residents' preference for facilities. In this way, the hierarchical life circle of the central village and the grassroots village was built up.
　　According to the three elements used to construct the hierarchical life circles, the level consistency, spatial consistency, and demand consistency of public service facilities in Banqiao Town were quantitatively evaluated and summarized from perspectives of service function, accessibility, and satisfaction. The results show that the current facility function configuration in Banqiao Town is not well-matched with the hierarchical life circle layers. It is necessary to match the service contents and scopes of life circle layers. The basic security facilities shall be set in inner layers of the hierarchical life circle, while facilities of quality improvement and advanced service can be relatively scattered. Facility layout has a low matching degree with the distribution of residential settlements; hence, it is necessary to match the radius of life circle layers with the traffic conditions of mountain villages and the traveling intentions of residents, thus enabling a decrease in the service radius of basic public service facility standards. Since residents' satisfaction with facilities in the central village was low, it is necessary to match service quality and residents' needs. Attention should be paid to the balanced layout of low-level public service facilities and improving the quality of high-level public service facilities. 

Key words: mountain villages, public service facilities, hierarchical life circle, demand characteristics of residents

摘要： 山地村镇在山地地形复杂性和山地居民生活特殊性的双重影响下，产生了独特的生活圈模式。以重庆市永川区板桥镇为例，基于马斯洛需求模型界定出山地村镇两种层级型生活圈，以微观尺度下的村镇居民生活特征、公共设施的空间分布特征以及公共设施的需求特征为切入点，采用定性和定量相结合的方法，对板桥镇公共设施的功能、可达性、满意度三个方面进行评价与总结。研究发现，板桥镇居民的生活有封闭性与自给性的特点，对公共设施的使用范围相对局限；板桥镇公共服务设施的现状服务范围无法满足居民的需求，设施布局与居民聚居点分布的匹配度不高，中心村居民对设施的满意度相对较低，应当按照层级型生活圈模型对公共服务设施进行提升和优化。

关键词: 山地村镇, 公共服务设施, 层级型生活圈, 居民需求特征