To solve these problems and did a lot of research and experiment, in fact developed jet concrete ropy agent, ZhunXing overloading of Inner Mongolia highway tunnel, zhuhai board ZhangShan highway tunnel and Beijing subway, guangzhou metro engineering, wuhan rail, haikou QiJian, hunan province construction group, liuyang - changsha water diversion project of high-speed railway tunnel, wuhan-guangzhou trial showed that the etc worksite jet springback the losses: sidewall 6 ～ 9 %, arch departments, 1 3 ～ 1 8 %, Dust content to 5 ～ 9 mg/cubic meters, has achieved remarkable economic and social benefits.
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The corrosion resistance of Guangzhou Metro engineering concrete to groundwater was investigated by simulated and accelerated corrosion tests.
采用模拟和加速腐蚀试验方法，研究了广州地铁工程混凝土对地下水的耐腐蚀性能。
The dissoluble corrosion of Guangzhou metro engineering concrete in direct current was studied by an accelerated DC dissolving test of the residue mortar and correlating it with concrete.
通过加速试验方法研究了直流电流作用下混凝土筛余砂浆的溶蚀性能，并建立了其与广州地铁工程混凝土在杂散电流下的溶蚀性能之间的关系。
Considering the practical engineering of Guangzhou Metro Line 3 and Line 4, the intelligent low voltage distribution system is briefly introduced.
结合广州地铁3、4号线工程实例，介绍智能低压系统的设计和应用。
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