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項(xiàng) 操作平臺每次安裝,必須派專人檢查斜撐槽鋼下端必須伸過門洞砼邊不少于 10cm。 操作平臺的吊環(huán)設(shè)置在稍偏中位置, 使得平臺受拉力后,旋轉(zhuǎn)一定角度,順利將操作平臺提升。如果焊縫長度不足,需加焊鋼板。 三、 制作要求 采用 10槽鋼和 3mm 厚的鋼板作為主要材料,槽鋼和鋼板要選擇無銹蝕的、無變形的。當(dāng)受力時(shí),槽鋼下端有下滑的趨勢,只要阻止槽鋼的下端的下滑,即可制止操作平臺的下沉。 二、 搭設(shè)原理 利用三角形的穩(wěn)定原理,制作操作平臺??偢叨葹?。電梯井操作平臺施工方案 一、 工程概況 裕龍科技大廈位于青島市嶗山區(qū),海爾路東側(cè),南于青島啤酒城僅一路之隔,東挨裕龍公寓一期??偨ㄖ娣e為 45521 ㎡,地下兩層,為人防工程及車庫;地上二十六層,一、二層為商業(yè)網(wǎng)點(diǎn),三至二十六層為高級公寓住宅。主體施工階段,電梯墻板模板采用鋼大模,由于電梯內(nèi)筒從上至下無樓板隔斷,考慮施工安全和支設(shè)鋼大模的方便,在筒內(nèi)設(shè)置操作平臺形成隔斷,防止材料和料具從電梯內(nèi)筒墜落,操作平臺隨著樓層的增高,而逐漸提升。利用筒體砼側(cè) 壁不變形,斜撐槽鋼下端支撐在下層電梯門洞處的樓層樓板上,上端斜依在門洞對面的砼板墻上。從而利用這一原理,安置操作平臺。 制作時(shí),各連接點(diǎn)的焊縫一定要飽滿,焊縫長度不得小于 10cm。 操作平臺板面比樓層標(biāo)高低 100mm,吊裝大模時(shí),可在大模底角墊設(shè)槽鋼,使得大模螺桿孔相對應(yīng)。 槽鋼作支架,鋼板僅作蓋板,見詳圖。 安裝過程中,必須等操作平臺安穩(wěn)后,才能將塔吊的掉繩卸除。 每次安裝內(nèi)筒大模時(shí),先試吊,等確定安全后,再松動(dòng)吊大模的鋼絲繩。 q=mA=25= 以 A 點(diǎn)取距: FcL/2 Fc=247。= kN 根據(jù)外力平衡的原理: FBy=N= kN FB= FBy/sin50= kN FBx= FB LBCm 單肢斜撐的彎矩為 1/2 MAB= kN AD 桿受到的彎矩: MAD=qm 單肢桿件的抗彎矩驗(yàn)算 σ =M/ω =( 106/ 103)247。 體系受力簡圖如下: g an employment tribunal claim Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to a