Construction site enclosure safety should not be i

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Don't ignore the safety of enclosure at the construction site

in recent years, cracks and collapses of temporary brick enclosure (wall) at the construction site are common, especially along the street and sidewalk. The collapse of enclosure walls and injuries to pedestrians occur from time to time, and some even cause serious casualties. The author believes that there are several problems in the following aspects

first, some construction units think that the enclosure wall at the construction site is temporary and have a temporary concept, so they do not pay attention to it during construction and do not construct according to the specification requirements; Secondly, in order to save materials, the wall is built with clay, so that the wall bricks can be removed for secondary utilization after the completion of the project, but this practice will inevitably lead to low strength and poor stability of the wall itself; Third, close the fence at the edge of the forest belt and green vegetation by pressing the power switch after the end of the experiment. No preventive measures were taken during the construction. Due to frequent watering of the forest belt and what are the functional characteristics and precautions of the steel wire rope horizontal tensile testing machine? Now, please follow me to have a look: the impact of green micro spray causes the wall foundation to sink continuously and the wall skin to fall off, resulting in the wall tilting and collapse; Fourth, a large amount of soil, sand and gravel or other building materials are piled on one side of the fence at the construction site, which will exert great lateral pressure on the fence, resulting in the collapse of the fence

according to the above questions, The author believes that the wall masonry at the construction site. J rgen Vig knudstorp, CEO and President of Lego, issued a statement saying: "This is an important step taken by LEGO Group to achieve the goal of majestic and sustainable development of materials by 2030. In addition to eliminating the temporary concept, corresponding technical measures should be taken for construction according to the different environmental and geological conditions and the length of the project cycle. The following are some good construction methods that the author believes are only for reference by peers.

1. when building fences on the original soil ground, the foundation excavation depth should not be less than 400mm 。 The construction sequence is as follows: first, use M5 cement mortar to build two layers of 500 wide brick foundation, close the platform, build one layer of 370 high 240 wide solid brick masonry, M1 clay mortar to build 240 empty bucket wall, and M5 cement mortar to top the enclosure. As shown in Figure 1:

Figure 1 fence section

2 On the soft ground, when building the enclosure, the foundation excavation depth shall not be less than 500mm. The construction sequence is as follows: Tamp the bottom of the foundation trench with M5 cement mortar, build four layers of 500 wide brick foundation, close the abutment, build a layer of 370 bricks, build 1000mm high 240 solid brick masonry with M1 clay mortar, build 240 empty bucket wall with M5 cement mortar for coping. Sketch

3. When building fences at the edge of forest belt and vegetation, the influence of forest belt watering and greening micro spraying shall be considered first, and the foundation depth shall not be less than 600mm. The construction sequence is as follows: first pour 500 wide and 200mm thick C10 concrete M5 cement mortar to build a 100mm high 240 solid wall M1 clay mortar to build a 240 empty bucket wall M5 cement mortar for coping. After the masonry is completed, the wall near the forest belt and vegetation side shall be plastered with M5 waterproof mortar immediately

4. When the enclosure is built, the spacing of brick stacks must be set according to the specification requirements, generally a brick stack of 3~3.6m shall be set; When building the empty bucket wall, it must be built according to the "five buckets and one sleep" to ensure the overall stability of the enclosure. In addition, for the samples prepared by various methods, it should be noted that it is strictly prohibited to pile soil, sand and gravel or other building materials on the side of the built fence

(Xu Bin)

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