In recent years, cracks and collapses of temporary brick fences (walls) on the construction site are common, especially along the streets and sidewalks
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The collapse of fences and injuries to pedestrians occur from time to time, and some even cause serious casualties
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The author thinks that there are the following problems
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First, some construction units think that the enclosure on the construction site is temporary, so they do not pay attention to it during the construction and do not construct according to the requirements of the specification; second, in order to save materials, the enclosure is built with clay, so as to remove the enclosure brick for secondary use after the completion of the project, but this practice is bound to cause the low strength and poor stability of the enclosure itself; third, in the forest Due to the influence of frequent watering of forest belt and micro spraying of greening, the foundation of the wall is sinking and the wall skin is falling off, which leads to the wall inclining and collapsing
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Fourth, a large amount of soil, sand and stone or other building materials are piled on one side of the wall at the construction site, which produces greater lateral pressure on the wall, resulting in the collapse of the wall
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According to the above problems, the author thinks that in addition to eliminating the temporary concept, we should take corresponding technical measures according to the different environmental geological conditions and the length of the project period
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The following are several construction methods that the author thinks are better, for reference only
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1
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When the enclosure is built on the original soil ground, the excavation depth of the foundation shall not be less than 400mm
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The construction sequence is as follows: first, use M5 cement mortar to build two layers of 500 wide brick foundation, close the abutment and build one layer of 370 masonry, 500 high 240 wide solid brick masonry, M1 clay mortar to build 240 empty bucket wall, and M5 cement mortar to press the top of the enclosure
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2
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On the soft ground, when building the enclosure, the foundation excavation depth should not be less than 500mm
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The construction sequence is: ramming M5 cement mortar at the bottom of the foundation trench, four layers of 500 wide brick foundation, one layer of 370 brick masonry, 1000mm high 240 solid brick masonry, M1 clay mortar masonry, 240 empty bucket wall, and M5 cement mortar capping
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The picture is brief
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3
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When building enclosure beside forest belt and vegetation, the influence of forest belt watering and greening micro spraying should be considered first, and the foundation depth should not be less than 600mm
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The construction sequence is as follows: first, pour 500 wide and 200 mm thick C10 concrete M5 cement mortar, build 240 solid wall with 100 mm high M1 clay mortar, build 240 empty bucket wall with M5 cement mortar, and immediately use M5 waterproof when building enclosure near forest belt and vegetation Mortar plastering
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4
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When the wall is built, the spacing between brick stacks must be set according to the requirements of the specification, generally 3 ~ 3.6m, with a brick stack; when the empty bucket wall is built, it must be built according to “five buckets and one sleep” to ensure the overall stability of the wall
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In addition, it should be noted that it is strictly forbidden to pile soil, sand and stone or other building materials on one side of the wall
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