Qi Yanliang said: "It seems that we are entering a dangerous shoal area ahead."
Ren Li said: "Really? What is a dangerous shoal area?"
Dai Zhao said: "I heard that few people can come out after passing here. There are some weird things. I don't know what they are, but there are always old people warning not to step into this place."
Part of this is the Gobi Desert. I saw something round in the distance, just on the ground.
Ren Li said: "Is this a cactus? Look at its shape."…
Dai Zhao said: "The cactus is green, right? Is it brown?"
Ren Li said: "Maybe they are different varieties?"
Qi Yanliang said: "Want to take a closer look?"
Dai Zhao said: "Don't go, who knows what it is, take a detour and go away."
Qi Yanliang said: "I saw it seemed to be moving."
Ren Li said: "Don't be scared, the heat wave will cause the image in front of you to deform."
But there is no way to go to other places, so we have to pass slowly.
The round thing slowly opened up, revealing a pointed head and several bamboo-like legs. Like a big ladybug.
Ren Li said: "What is this? It doesn't bite people, does it?"
Qi Yanliang said: "We are in the car. It's okay."
Their construction vehicle was locked and they couldn't get in, so they had to ride in an off-road vehicle.
The big insect ran over to the car.
Dai Zhao said: "Be careful not to go out, we will rush over."
The car charged forward and passed several ladybugs. The ladybug seemed to be scared and ducked into the sand.
Dai Zhao said: "Don't be afraid, they don't bite, they just get into the sand and run away."
After a while, the sand sank and a huge whirlpool appeared, sucking in all the surrounding gravel.
Qi Yanliang said: "What is this? It's starting to sink?"
Dai Zhao said: "I remembered, this is a sand spinworm. It burrows into the sand to create a whirlpool, which can suck animals into it, suffocate it, and then prey."
There is also quicksand in its natural state. Rising groundwater reduces the friction between sand grains, causing the sand to begin to "flow," forming quicksand.
When the water in a loose sand belt reaches saturation, ordinary sand will tumble up, forming quicksand. If the water trapped in the sand cannot escape from it, liquefied soil forms, which can no longer support the weight. There are two ways to increase the tumbling of sand, eventually forming quicksand.
Forces from ground vibrations can increase pressure in shallow groundwater, causing sand and silt deposits to liquefy. Liquefied surfaces no longer have the ability to support, so buildings or other objects on the ground can sink or collapse.
According to Dr. Larry Barron of the Geological Survey of New South Wales, vibrations increase fluidity, so that materials that were previously quite solid become soft and flowable.
The vibrations and barriers created by the water reduce the friction between the sand grains, causing the sand to act like a liquid. In order to understand quicksand, you first need to understand the liquefaction process. According to the Utah Geological Survey, when soil liquefies, it becomes unsupportive like quicksand and behaves like a viscous liquid rather than a solid. During an earthquake, liquefaction can cause buildings to sink significantly into the ground.
Quicksand's surface becomes liquid-like once disturbed.
It takes days to make sand sticky, but it's easy to make it lose its stickiness by applying just the right amount of pressure to its surface. Once the quicksand surface is disturbed by movement, it will quickly become liquid-like in nature, the surface sand will become very soft, and the shallow sand will quickly run down. This migration movement causes objects moving on quicksand to sink. However, as the depth of sinking increases, the sand and clay that fall from the upper layer to the bottom layer through migration movement gradually aggregate, creating a thick sedimentary layer, which makes The viscosity of the sand increases rapidly, preventing the object from sinking further.
Objects less dense than quicksand will float on top of quicksand.
The study also found that when an object falls into quicksand, the sinking speed depends on the density of the object itself. The density of quicksand is generally 2 g/ml, while the density of humans is 1 g/ml. At such a density, a human body would not be catastrophic if it sank into quicksand. It would often stop sinking to the waist. Researchers also found that even some objects that are much denser than quicksand can float on quicksand. The aluminum basin is placed on the top of the quicksand. Although its density is greater than that of the quicksand, due to the influence of the buoyancy of the quicksand and the tension of the sand surface, the aluminum basin can still stay calmly on the surface of the quicksand. That changed when the scientists started shaking the aluminum container gently, and it sank a little. When they shook it harder, the container slowly sank to the sandy bottom.
Pulling a foot out of quicksand requires the strength to lift a car.
Research shows that people trapped in quicksand are generally unable to move. The increased density of the sand sticks to the lower half of the human body that falls into the quicksand, which puts great pressure on the human body and makes it difficult for people to exert force. Even a strong man would have difficulty pulling the trapped person out of the quicksand. The researchers calculated that if one foot of the trapped person was dragged out at a speed of one centimeter per second, it would require a force of about 100,000 Newtons, which is about the same force as lifting a medium-sized car. Therefore, unless there is a crane to help, it will be difficult to pull out the person who fell into the quicksand at once. The study also pointed out that according to the calculation of this force, if the person is pulled forcefully, the person's body will have been torn apart by the powerful force before the quicksand "lets go". The danger posed by this move was far greater than temporarily stopping him in quicksand.
Even a camel can be caught in it. The camels followed, panicking.
The car went around the whirlpool, but there were too many whirlpools, so it tilted and fell into it.
Everyone squeezed out of the car door, the camel stood, and everyone grabbed the camel rope. There is a camel called Da Luo.
"Da Luo, stand still and stand back, we are coming up."
Several camels were standing, and everyone grabbed the rope and climbed up.
Another whirlpool appeared and someone slipped and fell in. At this time the car fell in and he threw the hook to catch the door. He pulled the rope with one hand and held him with the other, using the gravity of the car to pull him up.
A dozen sand spinners went in and created a dozen whirlpools. After a while, the whirlpools disappeared and the desert returned to a flat landscape.
"It should be fine. They should have left, right?"
"I think so, they've got into the sand."
The small off-road vehicle suddenly tilted to one side and gradually sank into the sand. They had no choice but to run out. It turned out that some places looked smooth on the surface, but actually there were holes underneath.
I saw several brown-green animals in the distance. The skin of the body is made of leathery scales, and there are small bony plates under the scales. Teeth are small. The eyes are well developed, with cranial eyes, and the outer eyelids can move. The tympanic membrane is exposed. It turned out to be several lizards.
The lizard also saw them and ran towards them.
Dai Zhao said: "Quick, rush to the Gobi bushes."
There are several large plants with vines lying in various directions, which can block the lizards after entering.
The lizard was too big to get in. It took a few bites and left. At this time, the rattan shook a few times.
I thought it was safe, but the cane became smaller and smaller and secreted some liquid.
Dai Zhao said: "This is an acidic liquid. It is a carnivorous plant."
Qi Yanliang said: "Then run out."
Several people ran out, but Qi Yanliang was still inside. The gap is getting smaller and smaller.
The big gong bit the root of the plant, causing the plant to tremble. Da Luo bit it tightly, and the rattan seemed to be nauseating, and threw Qi Yanliang away.
The car was moving forward slowly, but after a while, dozens of whirlpools appeared in the sand. The car tilted left and right and was about to fall into the whirlpool. We can only connect the front truck to the rear truck with an iron chain, and plan to pull the rear truck out.
Several sand spirals crawled out of the sand and opened their mouths with tiny teeth.
