# 系列化泥水平衡顶管设备技术The Series Technology of Slurry-balance Pipe Jacking Equipment

DOI: 10.12677/JOGT.2018.402032, PDF, HTML, XML, 下载: 572  浏览: 1,127

Abstract: With the increasing number of projects for “old pipe reconstruction” and “new pipe expansion” of urban underground pipelines and constrained by urban traffic and environment, no zipper construction was allowed, and more and more slurry balance pipe jacking constructions were needed. For different sizes of various pipelines, there existed pipelines with various kinds of diameters, which would caused a cost increase as one pipe diamter only needed to match one set of jacking equipment, so high idle rate of equipment was induced after project completion. To improve the utilization rate of pipe-jacking equipment, the application of series pipe jacking equipment became one of key researches in pipe jacking construction industry. The major influence induced by pipe diameter variations on the equipment includes the changes of excavation diameter, power and slurry transportation. Calculation indicates that in the case of no changes of major components, the matching of pipe diameters can be implemented by changing tool pan and shell, which only need shorter working period and low cost.

1. 引言

2. 参数分析

2.1. 关键参数

2.2. 扭矩分析

${T}_{1}=\frac{1}{8}{D}^{2}\frac{v}{n}{q}_{\text{u}}$ (1)

${T}_{2}=\frac{\text{π}{D}^{3}}{12}Kf\gamma H\eta$ (2)

2.3. 顶力分析

2.4. 泥浆循环分析

1.35 m顶管泥浆管径D为0.15 m，隧道输送距离取L1 = 100 m，地面管道总长20 m，竖井深度h1 = 20 m，设定最低输送流量设定为150 m3/h，渣浆泵送渣土密度ρ1 = 1.2 t/m3。代入相应的流体力学水头损失经典计算公式，可求出100 m隧道的水关损失仅3.5 m，而管节内径的变化对泥浆泵送量影响并不大，因此泥浆循环可采用同一套系统。

2.5. 壳体强度分析

3. 顶管系列化范围

4. 系列化顶管配置

1) 排浆管。由于壳体变化，排浆管需要调整相应位置，为便于排浆管调整，一般排浆管设计位置应以系列化内最小断面的顶管尺寸为基准考虑，即排浆管的位置应布置靠上。在加大设备直径后，以增加短节的形式将排浆口引伸到机头底部。

2) 喷嘴。喷嘴的主要功能为冲刷刀具轨迹线、出渣孔，在刀盘变化后喷嘴可能无法喷射原轨迹线，因此喷嘴需设计为活动结构，在改变直径后调整喷嘴角度。

3) 尾盾承接环。尾盾承接环宜设计为螺栓固定方便拆装的结构，在改变壳体后，通过螺栓将新制尾盾承接环安装即可实现与首环管节的连接。

4) 排浆泵配置。首台排浆泵一般放置于第二环管节位置，因其弯头具有一定高度而可能影响激光定向路径，因此泵配置不宜过高，按系列化内最小断面的顶管尺寸为基准设计。

5) 纠偏油缸。纠偏油缸位置受设备直径影响，一般情况下均布于2点、5点、7点、11点位置，因此在壳体设计时考虑油缸安装的位置，以系列化内最小断面顶管尺寸为基准设计。

5. 结语

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