1  产品原理

土压平衡盾构施工的关键是将开挖下来的土体在压力仓内调整为“塑性流动状态”，即渣土改良，可以有效降低刀盘扭矩和盾构推力，减小刀具磨损，提高掘进效率。目前常用的改良剂有水、泡沫膨润土和聚合物，大部分渣土改良主要采用泡沫和膨润土。近年来，在参考国外施工经验的基础上，国内逐渐采用“泡沫剂+泥岩分散剂+水”的渣土改良方法。泥岩分散剂有着优良特性，如分散性、渗透性、剥离性，能够增强渣土的粘滞性，改善刀盘的工作环境，增加土仓的密封和便于渣土的运输。因此，泥岩分散剂技术的应用代表着渣土改良的发展方向。

2  产品成分

本产品由高分子聚合物，除粘剂，强力渗透剂和稳定剂等成分组成，能够直接快速渗透到粘泥胶团中，阻断黏土内部膜质层，形成松散的错位结构，同时借助结合剂和活性剂的作用，有效改良渣土，降低刀盘扭矩和盾构推力，减小刀具磨损，提高掘进效率。

3  性能参数

Zhongke Changqing ZKY-102, 

Anti-clay polymer for earth pressure balance Tunnel Boring Machines (TBM)

Zhongke Changqing ZKY-102 is the latest generation of anti-clay additives for tunnel boring machines. It is a liquid polymer, specially designed for clayey soils with high clogging and adhesion. It is manufactured from natural, renewable resources and presents a milestone in terms of environmental compatibility.

ZKY-102 can be used with the standard foam generators installed on EPB machines. It can be injected at the cutter-head, into the working chamber and screw conveyor.

² Reduction of clogging and adhesion effects on the cutter-head.

² Creation of a plastic soil material which can be easily excavated and transported.

² Avoiding re-agglomeration of clay particles.

² Reduction of cutter-head torque.

² Enhance in TBM Speed.

ZKY-102 is packed in IBCs (1075 kg - slight variations depending on region).

ZKY-102 is used as an aqueous solution with typically 10-20% concentration. Injected by a foam generator, the typical foam expansion ratio (FER) varies between 6 and 18, and the foam injection ratio (FIR) between 25 and 75. If the consistency of the muck needs to be reduced, high-efficiency foam agents can be used in combination with ZKY-102. For the first use and combination with other soil conditioning agents, please keep in touch with our engineers.

ZKY-102 can be used with standard TBM dosing and foaming equipment.

Do not mix pure ZKY-102 with any other pure soil conditioning additives as this may cause immediate gel formation. If several foaming products or polymers are used, it is preferable to reserve a specific transfer or dosing pump for ZKY-102. If a transfer or dosing pump is being used for more than one product, the pump should be cleaned with water before switching to other products.

It should be stored between 5℃and 40℃. If stored in original tightly closed containers, it will have a shelf life of 12 months. Do not allow the product to freeze. Please consult our engineers prior to the use of any product that has become frozen.

Standard precautions for handling chemical products should be observed: avoid eye and skin contact and wear rubber gloves and safety glasses. If contact occurs, rinse with plenty of water. In case of eye contact seek medical advice.