所谓的沟槽边缘的裂缝，主要就是针对家里在水电改造的时候，墙面上所开的沟槽接缝。在沟槽内布置水管线管之后，一般都是使用相应的材料对沟槽进行恢复，在恢复过程中没有处理好就可能出现裂缝。常见原因如下：

　　The so-called cracks at the edge of the groove are mainly aimed at the joints of the grooves opened on the wall during the water and electricity renovation at home. After arranging water pipes in the trench, corresponding materials are usually used to restore the trench. If not properly treated during the restoration process, cracks may occur. The common reasons are as follows:

　　原因分析

　　Cause analysis

　　①回填沟槽的时候，沟槽内回填材料不密实。使用回填材料来回填沟槽的时候没有将内部填塞密实，例如管道底部虚空的，就容易造成沟槽的开裂。

　　① When backfilling the trench, the backfill material inside the trench is not dense enough. When using backfill materials to fill the trench back and forth, if the interior is not filled tightly, such as the void at the bottom of the pipeline, it is easy to cause the trench to crack.

　　②沟槽回填材料选择不正确。对于水电的沟槽，个人认为应该是高强的水泥砂浆或者是细石混凝土回填，不允许使用粉刷石膏回填。

　　② The selection of backfill material for the trench is incorrect. For water and electricity trenches, I personally believe that high-strength cement mortar or fine aggregate concrete should be used for backfilling, and the use of plaster for backfilling is not allowed.

　　③回填以后，没有对沟槽的回填材料进行养护。例如使用水泥砂浆回填沟槽，没有及时的洒水养护，导致水泥砂浆失水而出现了开裂。

　　③ After backfilling, the backfill material for the trench was not cured. For example, using cement mortar to backfill trenches without timely watering and curing resulted in cement mortar losing water and cracking.

　　处理方法

　　Handling method

　　①首先将沟槽开裂部位的混凝土或者是水泥砂浆轻轻的剔凿掉，这时一定要注意不要破坏里面的管线。

　　① Firstly, gently chisel off the concrete or cement mortar at the cracked part of the trench, and be sure not to damage the pipelines inside.

　　②在沟槽的内部使用挂钢丝，钢丝网一定要挂严实。

　　② Use hanging steel wire inside the groove, and the steel wire mesh must be hung tightly.

　　③建议大家使用水泥砂浆抹，涂抹的时候最起码要分两遍来进行。如果通过水泥砂浆的厚度超过了30mm，需挂两层钢丝网。抹灰第一遍完成以后在表面再挂一次，以此增强其抗裂的能力。

　　③ It is recommended that everyone use cement mortar to apply, and at least two coats should be applied. If the thickness of the cement mortar exceeds 30mm, two layers of steel wire mesh need to be hung. After the first coat of plastering is completed, hang it again on the surface to enhance its crack resistance.

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