Chapter 254
After digging these trenches, Lu Yan started the doomsday survival system again. Soon, the direction of upgrading the trenches also appeared in his sight.
[Upgrade direction one: expand and deepen the trench, specific data can be entered manually! The points consumed will also increase as the depth and width increase! 】
[Upgrade direction two: Reinforce the trench and use stone to prevent water leakage! Need 150 survival points! 】
Looking at the two upgrade directions that appeared in front of him, Lu Yan decisively chose option one. After inputting the depth and width that needed to be expanded based on the data on the design drawing, an option popped up in front of him again.
[Do I need to spend 120 points to expand the depth of the trench to three meters and the width to two meters? 】
120 points…
This price seems a bit expensive, but for Lu Yan at this time, the most important thing is not points but time. If he can complete the construction of the camp one day earlier, he will be able to expand his power one day earlier, and he will spend points today. Build drainage channels, and your score will also increase in tomorrow's daily assessment. Overall, you are not losing money!
Lu Yan gritted his teeth and pressed the OK button directly.
As the light rose, the low trench in front of him suddenly expanded several times and turned into deep ravines.
The interior of the underground drainage channel requires the use of highly corrosion-resistant stone channels, so although the current trench has been dug out, it is still unusable. Lu Yan thought about it and took the remaining stones and some iron from the construction of the city wall. came out, threw them all into the trench, and once again chose another upgrade direction.
[Use stones to reinforce drainage channels and prevent water leakage! 】
The stones in the trench melted rapidly and closely adhered to the earth wall. Slowly, the entire trench was covered with stones, forming an extremely neat stone passage.
Generally, underground drainage pipes in cities are connected by sections of stone water pipes. Over time, water seepage may occur at the connection location. However, the drainage pipes after the upgrade of the Doomsday System are formed at once. There is no interface in the middle, which also avoids the hidden danger of water leakage from the interface.
Lu Yan looked at the neat pipes that appeared in the trench. He marked several wellheads, cut out an entrance, and then buried and filled the drainage pipes.
Because the drainage pipes are mixed with iron wire frames, the strength they can withstand has been greatly improved. Even if Luyan carries out heavy equipment construction above the drainage channels in the future, the drainage pipes will not be damaged.
It took Lu Yan about two hours to complete the filling of the entire drainage canal. It was almost noon, and the scorching sun hung above the head, making the whole body extremely hot and giving a stinging feeling like the skin had been sunburned.
Lu Yan wiped the sweat from his forehead. Even with his physical fitness, it was difficult for him to withstand long hours of work under the scorching sun.
"It's time to rest for a while..." Lu Yan put the shovel aside and strode to the ice cellar. He took out a bottle of juice that he had placed inside and drank it in large gulps. The cold and sweet juice entered his mouth and instantly filled his body. All the fatigue has been driven away.
Although suddenly drinking cold drinks when hot and tired can cause injuries to the spleen, stomach, and capillaries in the body, considering Lu Yan's current physical strength, this trivial matter is not a problem at all.
"Next, we should build a weapons platform and harden the ground..." Lu Yan glanced at the camp and prepared to rest for a while before proceeding to the next step.