1, it was early spring. They let her bathe in a pure pool to warm and smooth her creamy skin.
2. When you ask about the untimely return date, late rain will rise in the autumn pool.
3. My first tree in the West Wild Goose Lake is blooming with faint ink.
Specific introduction of swimming pool:
Pool is a kind of water storage facility with anti-seepage function, which is a small pit filled with water made of natural or artificial materials. Natural pools are also called ponds. A pond is a smaller body of water than a lake. The method of defining ponds and lakes is controversial. Generally speaking, the pond is too small for the boat to cross.
Another definition is that people can cross safely without being completely submerged, or the water is shallow and the sun can shine on the bottom of the pond. The word pond may also be used only for artificial ponds. In any case, there is usually no water inlet on the ground in the pond. Both rely on natural groundwater and rainwater or artificially introduce water into the pool.
Because of this, the closed ecosystem of ponds is different from that of lakes. The water in the pond is often green because there are many algae in it. In Asia, ponds are common in courtyards and residential areas; In Europe, ponds often appear in castles; In Canada, water resources are abundant and ponds are common.
Structural structure:
The open tank body consists of two parts: the tank bottom and the tank wall. Most of them are seasonal pools, which have no anti-freezing and anti-evaporation effects. The circular pool structure has good stress conditions, less building materials and less investment under the same water storage conditions.
The foundation bearing capacity of the open circular masonry pool is designed according to 10t/m, the bottom plate of the pool is made of C 15 concrete with a thickness of 10cm, and the wall of the pool is made of M7.5 masonry, and the thickness is determined according to the load condition according to the standard design or relevant specifications. Table 2 lists the main dimensions, quantity and materials of the open circular mortar masonry pool for reference.
The body composition, auxiliary facilities and wall structure of rectangular pond are basically the same as those of circular pond, except that the circular pond is changed into rectangle according to the terrain conditions. However, the structural stress of rectangular pool is not as good as that of circular pool, and the corner is a weak link, so preventive and reinforcement measures should be taken.
When the water storage capacity is less than 60m, its shape is approximately square. When the length-width ratio of the pool exceeds 3, a partition wall should be set in the middle to prevent the side wall from becoming unstable due to excessive lateral pressure. In this way, a pool is divided into two parts, and a water outlet is left at the upper part of the partition wall, which can effectively precipitate sediment.