Bamboo Winding Composite Utility Tunnels:a case study on mechanical behavior with WSN monitoring and numerical simulation

Bamboo Winding Composite Pipes(BWCPs)have many advantages such as good mechanical properties,low cost,low carbon,environmental friendliness,thermal insulation and easy installation et al.At present,BWCP is widely used in urban water supply,drainage,communication cable protection,farmland irrigation etc.It is obvious that the Bamboo Winding Composite materials have good application prospects in the field of utility tunnels.However,considering that the size of utility tunnels is much larger than that of normal pipelines,the wide application of Bamboo Composite Utility Tunnels(BCUTs)is still a challenge.In this paper,the force performance of BCUT in Datong Shanxi Province,was studied using two methods:real time monitoring and numerical simulation.Wireless sensor networks were used for monitoring,and the real time monitoring data of horizontal convergence and strains under the condition of backfill were obtained.The monitoring data indicated that the horizontal convergence can meet the requirement of relevant technical standards.A three-dimensional numerical model of the utility tunnel was established using FEM software.The influence of soil parameters on the deformation and strain of the BCUT was studied using the numerical method.The simulation results were compared with real-time monitoring data.The soil parameters K_(0) and k_(sh) have significant effects on the deformation,stress and strain of the utility tunnel.This kind of utility tunnel is recommended to use in areas with relatively good geological conditions.

竹缠绕复合管(BWCP)具有力学性能优良、成本低、低碳环保、隔热、安装方便等优点。目前,竹缠绕复合管被广泛应用于城市给排水、电缆保护、农田灌溉等领域。竹缠绕复合材料在综合管廊领域具有良好的应用前景。然而,考虑到综合管廊的尺寸要远大于一般管道,竹缠绕复合管廊(BCUT)的广泛应用仍然是一个挑战。本文采用实时监测和数值模拟两种方法对山西大同的竹缠绕复合管廊受力性能进行了研究。采用WSN对其进行监测,获得了管廊收敛和应变实时监测数据。监测数据表明水平收敛能够满足相关技术规范的要求。利用有限元软件建立了管廊的三维数值模型,分析土体参数对管廊变形和应变的影响,并将数值模拟结果与实测数据进行比较分析。研究表明,土体参数K_(0)和k_(sh)对管廊变形、应力和应变影响非常显著。竹缠绕复合管廊建议在地质条件较好的地区使用。