The utility model is an improved caisson structure, including a number of precast caisson modules which are butted up and down in several sections. The prefabricated caisson module is hollow cylindrical, and the inner wall of the prefabricated caisson module is covered with a number of vertical directional grooves. The upper part of the directional slot is fixed to a vertical directional tube, and the top of the directional tube is extended to the prefabricated caisson module top. The top surface of the prefabricated caisson module is inserted in a directional slot, and there is a gap between the top surface of the directional tube and the bottom surface of the prefabricated caisson module in the upper part, the directional pipe and the directional slot are provided with water pipes, and the bottom of the prefabricated caisson module at the bottom is connected with the head of the water pipe, and the top of the pipe is extended to the top surface of the directional tube. The upper part of the prefabricated caisson module is connected to the bottom of the water pipe. The connection between the two pipes is located in the gap formed by the top and bottom of the directional tube, and the water pipe at the top is connected with the water knife pump. The utility model utilizes the high pressure water generated by the water knife pump to impact the bottom of the caisson, and reduces the sinking resistance.
【技术实现步骤摘要】
一种改进的沉井结构
本技术涉及沉井施工
,尤其涉及一种改进的沉井结构。
技术介绍
沉井是水中施工常用的一种施工工艺,在桥梁基础施工中居多。沉井有方形、圆形、椭圆形等形式,施工时提前浇筑首节,凝固后掏空下方,混凝土块开始下沉,随后继续浇筑上方,完成后再掏空,依次循环,直至开挖到基础底部。由于现有沉井一般采用现场浇筑,费时费力且形状无法做到复杂,下沉时阻力大,不利于后续施工。
技术实现思路
本技术旨在解决现有技术的不足,而提供一种改进的沉井结构。本技术为实现上述目的,采用以下技术方案:一种改进的沉井结构,包括若干节上下对接的预制沉井模块,所述预制沉井模块为空心圆柱状,预制沉井模块内壁均布若干竖直的定向槽,所述定向槽上部固设竖直的定向管,所述定向管顶部伸出预制沉井模块顶面并插入上部的预制沉井模块的定向槽内,且定向管顶面与上部的预制沉井模块的定向管底面之间有间隙,所述定向管与定向槽内设有水管,最底部的预制沉井模块内的水管底部连有水刀头,所述水管顶部伸出定向管顶面并与上部的预制沉井模块内的水管底部连接,两个水管的连接处位于彼此所在的定向管顶面和底面形成的空隙中,最顶部的水管连有水刀泵。最底部的预制沉井模块的底部为尖头。所述水刀泵为高压往复泵。本技术的有益效果是:本技术借助水刀泵产生的高压水对沉井底部进行冲击,减小下沉阻力;预制沉井模块避免了现场浇筑费时费力的缺点,形状也可做得复杂;定向管与定向槽配合使各预制沉井模块定位精准,连接牢靠;水管的连接处位于彼此所在的定向管顶面和底面形成的空隙中,方便对水管进行连接。附图说明图1为本技术的结构示意图;图2为本技术最底部的预 ...
【技术保护点】
一种改进的沉井结构,其特征在于,包括若干节上下对接的预制沉井模块,所述预制沉井模块为空心圆柱状,预制沉井模块内壁均布若干竖直的定向槽,所述定向槽上部固设竖直的定向管,所述定向管顶部伸出预制沉井模块顶面并插入上部的预制沉井模块的定向槽内,且定向管顶面与上部的预制沉井模块的定向管底面之间有间隙,所述定向管与定向槽内设有水管,最底部的预制沉井模块内的水管底部连有水刀头,所述水管顶部伸出定向管顶面并与上部的预制沉井模块内的水管底部连接,两个水管的连接处位于彼此所在的定向管顶面和底面形成的空隙中,最顶部的水管连有水刀泵。
【技术特征摘要】
1.一种改进的沉井结构,其特征在于,包括若干节上下对接的预制沉井模块,所述预制沉井模块为空心圆柱状,预制沉井模块内壁均布若干竖直的定向槽,所述定向槽上部固设竖直的定向管,所述定向管顶部伸出预制沉井模块顶面并插入上部的预制沉井模块的定向槽内,且定向管顶面与上部的预制沉井模块的定向管底面之间有间隙,所述定向管与定向槽内设有水管,最底部的预制沉...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。