电动吊篮施工时吊点位置的选择
2012-08-03 16:03阅读:
吊篮在起重作业中,应当根据被吊物体来选择吊点位置,吊点位置选择不当就会造成绳索受力不均,甚至发被吊物体转动,倾翻的危险.吊篮的吊点位置的选择,一般按下列原则进行.
一.
吊篮在吊运各种设备,构件时要用原设计的吊耳或吊环.
二.
电动吊篮在吊运各种设备,构件,如果没有吊耳或吊环,可在设备四个端点上捆绑吊索,然后根据设备具体怀况,选择吊点,使吊点与重心在同一条垂线上.但有些设备未设吊耳或吊环,如各种罐类以及重要设备,往往有吊标标记,应仔细检查.
三.吊篮在吊运方形物体时,四根绳应拴在物体的四边对称点上.
四.吊篮在吊装细长物体时,如桩,钢筋,钢柱,钢梁杆件,应按计算确定的吊点位置绑扎绳索,吊点确定有以下几种情况。
1.一个吊点,起吊点位置应设在距起吊端0.3L(L为物体的长度)处。如钢管长度为10M,则捆绑位置应设在钢管起吊点距端部10*0.3=3M处。
2.两个吊点,如起吊用两个吊点,则两个吊点应分别距物体两端0.21L处。如果物体长度为10M,则吊点位置为10*0.21=2.1M。
3.三个吊点:如物体较长,为减少起吊时物体所产生的应力,可采用三个吊点。三个吊点位置确定的方法是,首先用0.13L确定出丙端的丙个吊点位置
,然后把丙吊点间的距离等分,即得第三个吊点的位置,也就是中间吊点的位置。如杆件长10同,则丙端吊点位置为10*0.13=1.3M/.
4.四个吊点:选择四个吊点,首先用0.095L确定出两端的两个吊点位置,然后再把两吊点间的距离进行三等分,即得中间两吊点位置。如杆件长10M,则两端吊点位置分别距两端10*0.095=0.95m,中间两吊点位置分别距两端10*0.95+10*(1-0.095*2)/3/(图/文
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Basket in the lifting operation, should be based on the suspended
object to select the hanging position, the hanging position choice
is undeserved can cause the rope to uneven stress, even the
suspended object rotation, rollover risk. Hanging basket hoisting
points selection, general according to the following principles.A
basket in the hoisting equipment, components for the original
design of the lifting lugs or rings.Two. Electric basket in the
hoisting equipment, components, if there is no lugs or rings, the
equipment can be the four end bundling sling, and then according to
the specific bosom situation, choice of hanging point, so that the
hanging point and center of gravity in the same vertical line. But
some device is not provided with a lug or rings, such as various
tank type and important equipment, often hanging tag, should be
carefully examined.Three . The basket in the hoisting of square
object, four rope should be tied to the object edges on the
symmetrical points.Four. In hoisting basket of elongated objects,
such as pile, reinforced, steel column, steel bar, should be
determined by calculation of the hanging position lashing rope,
hanging point is determined to have the following kinds of cases.