The invention provides a freezing orifice anti-reversal device, which comprises a water supply pipe and a freezing pipe. The water in the water supply pipe is controlled by a water supply pipe orifice and a water supply pipe gate valve. The freezing pipe is coated with an anti-reversal gate valve external pipe clip and connected by an external pipe fixed bolt. The water supply pipe and the anti-reversal gate valve internal pipe clip are designed to be in plane contact. The inner pipe clip of the reverse gate valve is connected with the check gate valve through the expansion rod and the connecting rod respectively. The expansion rod and the connecting rod are surrounded by a fixed outer shell. The check gate valve is connected with the check gate valve switch through a screw, and the check gate valve switch is used to control the opening of the check device. The device of the invention can solve the phenomena of water leakage and sand blasting caused by the failure of the drill check valve and the damage of the orifice sealing device during the freezing construction process, and especially effectively deal with the engineering problems of water leakage and sand blasting during the late construction of the freezing hole.
【技术实现步骤摘要】
一种冻结孔口止逆装置
本专利技术涉及轨道交通的
,具体属于一种冻结孔口止逆装置。
技术介绍
在轨道交通建设等实际工程中,有时会遇到地下水压力较大的含水砂层。在这些地层施工近水平冻结孔发生钻孔漏水喷砂的情况非常频繁,严重时可以引起很大地层沉降,造成隧道管片和地面建筑变形损坏甚至酿成隧道垮塌的灾难性事故。采用冻结法施工时,有时因为冻结壁解冻,由于冻结管与隧道管片之间的空隙不能及时有效的封堵,也有发生漏水喷砂的情况。一般在开始施工冻结孔时发生孔口管松动脱落、冻结管断裂、钻头逆止阀失效和孔口止水装置损坏等情况较少也易处理,但在冻结孔施工后期,由于地层扰动加大渗透性提高很容易引起塌孔抱钻使得发生上述情况的可能性及其处理难度显著增加。
技术实现思路
本专利技术为了解决上述技术问题,提供一种冻结孔口止逆装置,尤其适用于冻结法施工,本专利技术装置可以解决冻结法施工过程中,由钻头逆止阀失效和孔口止水装置损坏等原因产生的漏水喷砂等现象,特别有效处理冻结孔后期施工的漏水喷砂等工程问题。本专利技术的技术方案是:一种冻结孔口止逆装置,包括供水管和冻结管,所述供水管中的水由供水管口和供水管闸阀控制,所述冻结管外包覆止逆闸阀外管卡,通过外管固定螺栓连接,所述供水管与止逆闸阀内管卡设计成平面接触,所述止逆闸阀内管卡分别通过伸缩杆和连接杆与止逆闸阀相连,所述伸缩杆和连接杆四周为固定外壳,所述止逆闸阀通过螺杆与止逆闸阀开关相连,通过止逆闸阀开关来控制止逆装置的开启。进一步,所述供水管中的水由供水管口和供水管闸阀控制。进一步,所述冻结管外包覆止逆闸阀外管卡,通过外管固定螺栓连接。进一步,所述 ...
【技术保护点】
1.一种冻结孔口止逆装置,其特征在于:包括供水管和冻结管,所述供水管中的水由供水管口和供水管闸阀控制,所述冻结管外包覆止逆闸阀外管卡,通过外管固定螺栓连接,所述供水管与止逆闸阀内管卡设计成平面接触,所述止逆闸阀内管卡分别通过伸缩杆和连接杆与止逆闸阀相连,所述伸缩杆和连接杆四周为固定外壳,所述止逆闸阀通过螺杆与止逆闸阀开关相连,通过止逆闸阀开关来控制止逆装置的开启。
【技术特征摘要】
1.一种冻结孔口止逆装置,其特征在于:包括供水管和冻结管,所述供水管中的水由供水管口和供水管闸阀控制,所述冻结管外包覆止逆闸阀外管卡,通过外管固定螺栓连接,所述供水管与止逆闸阀内管卡...
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