高压旋喷多管喷头的研制

Development of the 11-tube high-pressure rotary jet nozzle

摘要:

基于高压旋喷成桩机理以及目前市场对大桩径施工的需求，针对普通旋喷施工成桩直径小、排泥污染环境等问题，研制了一款能适应新工艺、新工法且能解决上述问题的多管喷头。通过对喷头在地下工作的实际状态进行分析，新研制的多管喷头具有地内压力检测、专用通道排泥及浆管通径大等特点，可以实现大桩径施工、泥浆可统一回收及避免施工对周边建筑的扰动。

Abstract:

Based on the formation mechanism of high-pressure rotary jet piles and the current market demand for large diameter pile construction, a spray nozzle has been developed to cope with new processes and methods and eliminate the problems with conventional rotary jet such as small pile diameter, environmental pollution from mud discharge. Analysis of the actual working condition of the nozzle under the ground shows that the newly developed 11-tube nozzle has the characteristics of in-situ pressure detection, mud discharge through special channels, large thru-bore diameter of the slurry pipe, etc., which can realize large pile diameter construction, uniform mud recovery and avoid disturbance to surrounding buildings.