【正文】 isture, therefore lack water and produce the crack in a large amount. So do a good job of watering maintenance of concrete , can already reduce the crack that temperature produces , can also reduce the crack that the concrete shrink and produce . 2, castinplace board don39。該小區(qū)于 2020 年 10 月完工，竣工驗(yàn)收時(shí)，未發(fā)現(xiàn)明顯裂縫，在住戶裝修時(shí)，發(fā)現(xiàn)樓板有裂縫出現(xiàn)，故聯(lián)名向質(zhì)量監(jiān)督部門(mén)投訴，經(jīng)實(shí)地踏看， 16 幢房屋均存在深淺不一的裂縫。過(guò)早的加荷，人為地造成了現(xiàn)澆板裂縫。 如何防治現(xiàn)澆板板裂縫的產(chǎn)生，根據(jù)多年的施工經(jīng)驗(yàn)，提供以下一些防治措施，可供參考： 認(rèn)真做好現(xiàn)澆板養(yǎng)護(hù)工作，是保證混凝 土強(qiáng)度、防治裂縫產(chǎn)生的重要環(huán)節(jié)之一。為了控制好負(fù)筋保護(hù)層厚度，必須采用Φ 10Φ 14 的鋼筋馬凳，縱橫間距 800mm 左右來(lái)固定負(fù)筋的位置，并用電焊把馬凳與負(fù)筋焊牢，使馬凳在混凝土澆筑過(guò)程中不移位，保證負(fù)筋不下沉，從而有效控制負(fù)筋保護(hù)層的厚度，不使板負(fù)筋保護(hù)層過(guò)厚而產(chǎn) 生裂縫。 鋼筋連接技術(shù)可分為鋼筋焊接和鋼筋機(jī)械連接兩大類。 適用范圍：適用于 Ф18～ 50mm 的 Ⅱ 、 Ⅲ 、 Ⅳ 級(jí)帶肋鋼筋（包括焊接性差的鋼筋），相同直徑或不同直徑鋼筋之間的連 接。 以上是對(duì)現(xiàn)今常用的鋼筋連接方法的綜述，這些連接技術(shù)在美國(guó)、英國(guó)、日本等國(guó)家均得到廣泛應(yīng)用。 錐螺紋連接 利用錐螺紋能承受拉、壓兩種作用力及自鎖性、密封性好的原理，將鋼筋的連接端加工成錐螺紋，按規(guī)定的力矩值把鋼筋連接成一體的接頭。在實(shí)際生產(chǎn)中，應(yīng)根據(jù)具體的工作條件、工作環(huán)境和技術(shù)要求，選用合適的方法以期達(dá)到最 佳的綜合效益。 在板四角配置一定數(shù)量的角筋，即輻射筋。如果在混凝土尚未有一定強(qiáng)度的情況下，在其上面 集中堆放建筑材料或支模立撐，這樣帶給現(xiàn)澆板的不是強(qiáng)度，而是更多的裂縫。 房屋過(guò)長(zhǎng) 未設(shè)置必要的伸縮縫，也是導(dǎo)致裂縫的原因。而且裂縫部位多發(fā)生在應(yīng)力比較集中的地方 —— 板角處，卻與墻陰角線相垂直。t exceed 1% . Sand, stone grains of footpath careful and too light, mud content too big, will reduce concrete intensity, will make the concrete produce the crack finally. 5, dispose certain amounts of angle muscles in four corners of the board , radiate the muscle . Take place in board corner phenomenon this more to castinplace board crack, corner set up Φ all around in boardThe length radiates the muscle for about 1800mm, so as to meet demands of angle stress of the board, the stress sphere of action of making the castinplace board produce the crack conforms with radiation muscle, thus change and control the production of the crack effectively forced concrete structure reinforced with an overviewRein Since the reform and opening up, with the national economy39。t flex freely, so when the constringency of concrete cause to sprinkle knothole stipulation now should the dint exceed certain limit, certanly will cause to sprinkle plank to open crack the crack part take place much at should the dint more concentrated Cape in the placeplank, but is mutually perpendicular with the Overcast angle line of wall 2, construct too early on the castinplace board , add and carry on one39。roduction and prevention and cure of the crack of skyscraper Along with the speeding of town house construction step, not a few areas with small residences set up one after another, many inhabitants move continuously into the new residence, their quality to housing request is more and more high, particularly pay attention to very much to some cracks circumstances which sprinkle building plank to appear now, worry these cracks39。s shoulder or back the crack caused. norm of inspection of quality of structural construction of concrete stipulates , before the concrete intensity reaches , can39。s rapid and sustained development of a reinforced concrete structure built, reinforced with the development of technology has been great. Therefore, to promote the use of advanced technology reinforced connecting to improve project quality and speed up the pace of construction, improve labor productivity, redu