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Is tunnel shotcrete and rock bolting a losing proposition day after day? This machine fills in all the pits you’ve stepped into.
Release time:
2026-06-20
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Summary:
When it comes to shotcrete and rock bolting in tunnels, who hasn’t worried about these issues? Halfway through the job, pipe blockages and bursts send consumable costs skyrocketing; workers slog away in dust, greasing up in the dark and complaining bitterly; improper dosing of accelerators drives rebound rates so high it’s heartbreaking; and with heavy site dust, filter cartridges fail every other day—each machine stoppage burns through both time and money.
You might think it’s due to poor craftsmanship, but more often than not, it’s the equipment that hasn’t kept pace with the job at hand.
Recently, for a new project, we purchased a new wet‑spraying rig, which happens to be just the right tool to fill in those pits one by one. I’d like to recommend a reliable manufacturer that I’m currently using.
Zhengxun Heavy Industry’s wet‑spraying carriage is designed precisely to tackle these long‑standing headaches. Let’s start with the most frustrating issues: pipe blockages and consumable‑material costs. Conventional hoses wear through and clog after only a short time, turning annual consumables expenses into a significant burden. This machine replaces most of the hoses with wear‑resistant steel tubing, reducing internal friction and cutting the likelihood of blockages. As a result, it saves tens of thousands of yuan in consumables each year—and the longer it operates, the greater the savings.
Now let’s talk about those “maintenance tasks” no one on the construction site wants to do. Back in the day, with shotcrete rigs, workers had to crouch atop the equipment every day, manually greasing it—dusty, exhausting, and prone to missed or incorrect lubrication points, with critical components wearing out unnoticed. Today, this Zhengxun Heavy Industry wet‑spraying carriage comes equipped with an automatic lubrication system: no need for constant supervision—the machine self‑lubricates its key parts, reducing wear and lowering the likelihood of breakdowns. You no longer have to stand by the equipment day after day for maintenance, and your workers don’t have to endure long nights in a cloud of dust.
Another practical, hassle‑free feature of the Zhengxun Heavy Industry wet‑spraying rig is that you no longer have to stop frequently to replenish materials or water. Its accelerant tank and water storage tank are both generously sized, so when working on large‑scale tunnel projects, you don’t need to pause every so often to add more material—allowing for continuous operation and a significant boost in productivity. Even more importantly, the accelerant dosage is precisely controlled, ensuring that the sprayed concrete meets strength requirements while keeping rebound low. This minimizes material waste, and each pass achieves the required standards, eliminating the need for rework or additional spraying. 
By the way, Zhengxun Heavy Industry’s wet‑spraying carriage has also refined key details like the filter element and air supply. No matter how dusty the job site, it keeps dust out; with less frequent filter changes, the machine is less prone to breakdowns, so you no longer have to halt major operations over minor issues.
In the tunnel‑construction business, it’s not about who can pull the longest all‑nighters; it’s about minimizing breakdowns, reducing rework, and cutting unnecessary expenses.
This Zhengxun Heavy Industry wet‑spraying rig doesn’t come loaded with fancy bells and whistles; instead, it turns those everyday headaches—clogged pipes, routine maintenance, material replenishment, and rework—into hassle‑free tasks you can simply “leave to the machine.”
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
E-mail:19967177733@163.com
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