The invention is a displacement monitoring point around a tunnel, belonging to the technical field of tunnel monitoring and measurement, and is specifically applied to the displacement monitoring around a tunnel. The displacement monitoring points around the tunnel include expansion screw and ring measuring points. When monitoring the displacement around the tunnel, it is necessary to make monitoring points for the displacement around the tunnel. At present, there is no ready-made device on the market for monitoring the displacement around the tunnel. When the measuring points are buried, the steel bars bending into triangles are usually welded on the embedded steel bars. The roughness of the monitoring points produced by this way affects the measuring accuracy, and the operation is troublesome, so it can not be measured in time. The invention solves this problem well. The expansion screw is anchored in the pre-drilled hole, and the leakage ring measuring point is used as the observation point. The convergence meter hook is used to hook the ring measuring point when measuring. The invention has the advantages of fine fabrication, convenient embedding and strong connection with the tunnel, greatly improving the measurement accuracy and efficiency of embedding the measuring points, and can be measured immediately after embedding, thus meeting the requirement of timely monitoring for the monitoring and measurement of the tunnel.
【技术实现步骤摘要】
隧道周边位移监测点
本专利技术为隧道周边位移监测点，属于隧道监控量测
，具体应用于隧道周边位移监测。
技术介绍
在隧道周边位移监测时，需要制作隧道周边位移监测点。目前，市场上没有现成的装置可作为隧道周边位移监测使用，测点埋设时一般采用弯成三角形的钢筋焊接在预埋的钢筋上，这种方式制作的监测点粗糙影响测量精度，且操作麻烦，不能及时测量。本专利技术很好的解决了这个问题，采用膨胀螺丝锚固在事先钻好的孔内，外漏的环形测点作为观测点，测量时用收敛计挂钩勾住环形测点即可。本专利技术，测点制作精细，埋设方便，与隧道连接牢固，大大提高了测量精度和测点埋设效率，且埋设完成即可测量，满足了隧道监控量测需要及时监测的要求。
技术实现思路
隧道周边位移监测点，包括：膨胀螺丝、环形测点。各组成部分特征如下：膨胀螺丝：包含螺杆2、螺母3、垫片4、圆形套管5。螺杆2上端为等直径带螺纹螺杆，下端直径逐渐扩大；螺母3为六角螺母；垫片4为中空圆形垫片；圆形套管5，下部两垂直方向开槽。球形测点：为一横向圆管。附图说明图1隧道周边位移监测点正面图图2隧道周边位移监测点侧面图图3隧道周边位移监测点立面图具体实施方式（1）制作方法：环形测点1：采用外径为25mm，壁厚为2mm的圆管，截取长度为8mm。螺杆2：螺杆总长12cm，上端是直径为8mm的带螺纹螺杆，下端10mm范围直径逐渐扩大至12mm，上端与环形测点1焊接成一体。螺母3：为六角螺母，螺纹与螺杆2相匹配。垫片4：为中空圆形垫片，外径22mm，厚度为2mm圆形套管5：外径12mm，壁厚1mm，下部两垂直方向开槽，槽宽1mm，槽长20mm。（2...
【技术保护点】
1.隧道周边位移监测点，其特征在于：包括膨胀螺丝、环形测点。
【技术特征摘要】
1.隧道周边位移监测点，其特征在于：包括膨胀螺丝、环形测点。2.根据权利要求1所述的建（构）筑物沉降观测点，其特征在于：所述膨胀螺丝，包含螺杆2、螺母3、垫片4、圆形套管5。3.根据权利要求2所述的建（构）筑物沉降观测点，其特征在于：所述螺杆2上端为等直径带螺纹螺杆，下端直径逐渐扩大。4.根据权利要求2所述的建（构）...
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