The factors obtained are beneficial to the use of foams in Earth Pressure Balanced Shield Tunneling.

得出了气泡改良开挖土体的主要影响因素，对盾构用气泡在实际中的应用具有指导意义。

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The United States VTON Granville shield imported pneumatic multi-stage step-down regulator valve, using the sleeve guide, pressure balanced valve.

美国VTON威盾进口气动多级式降压调节阀，采用套筒导向，压力平衡式阀芯。

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As the Earth Pressure Balanced Shield (EPBS) Tunneling is becoming comprehensive way to build the subway, foams as a good soil conditioning agent are widely used in EPBS.

随着土压平衡式盾构在我国地铁建设中的推广应用，气泡作为一种优良的土体改良剂，已经得到广泛的采用。

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