A grouting device for high-coagulability grouting materialsincludes a grouting pipe, a connector and a self-sealing pipe head, wherein one end of the connector is connected with a grouting pump through the grouting pipe, the other end of the connector is connected with the self-sealing pipe head through the grouting pipe, and the grouting pipe is connected with the connector and the self-sealing pipe head in a fixed and sealed mode. The grouting device is easy to install, features reliable connection between the grouting pipe and the connector and the self-sealing pipe head, and can be reused. Because the inner diameter of the connector is consistent with the inner diameter of the grouting pipe, and a slurry outlet on an end cap of the self-sealing pipe head is a circular slurry outlet, pressure loss in the grouting process is effectively reduced, and the grouting effect is good.

The invention relates to the grouting field, in particular to a grouting device for high-coagulability grouting materials. The grouting device comprises a grouting pipe, a connector and a self-sealing pipe head, wherein one end of the connector is connected with a grouting pump through the grouting pipe, the other end of the connector is connected with the self-sealing pipe head through the grouting pipe, and the grouting pipe is connected with the connector and the self-sealing pipe head in a fixed and sealed mode. The grouting device is easy to install, features reliable connection between the grouting pipe and the connector and the self-sealing pipe head, and can be reused. Because the inner diameter of the connector is consistent with the inner diameter of the grouting pipe, and a slurry outlet on an end cap of the self-sealing pipe head is a circular slurry outlet, pressure loss in the grouting process is effectively reduced, and the grouting effect is good.

A grouting system with an adjustable moving cavity pressure. The grouting system includes a master grouting pipe and a plurality of grouting valve pipes connected to the master grouting pipe, each grouting valve pipe is in an annular space within a borehole wall, the grouting valve pipe includes a grouting valve pipe body, and a spraying valve port is on the grouting valve pipe body. A grouting pipe, an air injection pipe and a movable piston are inside the grouting valve pipe body. The air injection pipe is connected with the movable piston to apply an air pressure into the movable piston, and the movable piston applied with the air pressure expands in volume to form a closed cavity between a lower part of the movable piston and the grouting valve pipe body, so that grouting is performed according to the position of the movable piston.

A method for sealing a post-cast strip in a foundation with no gap includes the following steps: mounting steel plates, horizontal pipes and vertical pipes cooperatively layer by layer in a post-cast strip, respectively, such that the upper open end of each vertical pipe protrudes from the ground through the post-cast strip; pouring grout into the post-cast strip from the top of the post-cast strip after the end of the settlement of the foundation, and carrying out high-pressure grouting into the vertical pipe using grouting equipment simultaneously; delivering the sealing grout poured into the vertical pipe to the horizontal pipes, such that the sealing grout overflows from the grout outlets of the horizontal pipes to densely fill up existing gaps; and cutting off the portion of the vertical pipe above the ground after the post-cast strip is completely sealed, and levelling the top of the cut-off vertical pipe with concrete.

A method for sealing a post-cast strip in a foundation with no gap includes the following steps: mounting steel plates, horizontal pipes and vertical pipes cooperatively layer by layer in a post-cast strip, respectively, such that the upper open end of each vertical pipe protrudes from the ground through the post-cast strip; pouring grout into the post-cast strip from the top of the post-cast strip after the end of the settlement of the foundation, and carrying out high-pressure grouting into the vertical pipe using grouting equipment simultaneously; delivering the sealing grout poured into the vertical pipe to the horizontal pipes, such that the sealing grout overflows from the grout outlets of the horizontal pipes to densely fill up existing gaps; and cutting off the portion of the vertical pipe above the ground after the post-cast strip is completely sealed, and levelling the top of the cut-off vertical pipe with concrete.

A grouting pipe with a vibration function includes: a grouting pipe body provided with a hydraulic control structure, a vibration structure and a grouting hole control structure; wherein the vibration structure is rotatably arranged inside the grouting pipe body, and the hydraulic control structure is provided outside the grouting pipe body; the grouting hole control structure is provided on an internal wall of the grouting pipe body, and the hydraulic control structure is connected to the grouting hole control structure through a first hydraulic pipe. The grouting pipe solves the technical problems that conventional grouting pipes may be blocked by sandy soil during a press-in process, and it is difficult for the slurry to diffuse.

A grouting pipe with a vibration function includes: a grouting pipe body provided with a hydraulic control structure, a vibration structure and a grouting hole control structure; wherein the vibration structure is rotatably arranged inside the grouting pipe body, and the hydraulic control structure is provided outside the grouting pipe body; the grouting hole control structure is provided on an internal wall of the grouting pipe body, and the hydraulic control structure is connected to the grouting hole control structure through a first hydraulic pipe. The grouting pipe solves the technical problems that conventional grouting pipes may be blocked by sandy soil during a press-in process, and it is difficult for the slurry to diffuse.

A nuclear island base slab of a nuclear power plant and a manufacturing method therefor, and a nuclear island of a nuclear power plant. The nuclear island base slab of a nuclear power plant includes a concrete base slab body and a plurality of air ducts embedded in the concrete base slab body. The air duct has an internal-penetrating bent pipe structure. A first end of the air duct is exposed on an upper surface of the concrete base slab body. A second end of the air duct is exposed on a side surface or the upper surface of the concrete base slab body.

A nuclear island base slab of a nuclear power plant and a manufacturing method therefor, and a nuclear island of a nuclear power plant. The nuclear island base slab of a nuclear power plant includes a concrete base slab body and a plurality of air ducts embedded in the concrete base slab body. The air duct has an internal-penetrating bent pipe structure. A first end of the air duct is exposed on an upper surface of the concrete base slab body. A second end of the air duct is exposed on a side surface or the upper surface of the concrete base slab body.

A method for sealing a post-cast strip in a foundation with no gap includes the following steps: mounting steel plates, horizontal pipes and vertical pipes cooperatively layer by layer in a post-cast strip, respectively, such that the upper open end of each vertical pipe protrudes from the ground through the post-cast strip; pouring grout into the post-cast strip from the top of the post-cast strip after the end of the settlement of the foundation, and carrying out high-pressure grouting into the vertical pipe using grouting equipment simultaneously; delivering the sealing grout poured into the vertical pipe to the horizontal pipes, such that the sealing grout overflows from the grout outlets of the horizontal pipes to densely fill up existing gaps; and cutting off the portion of the vertical pipe above the ground after the post-cast strip is completely sealed, and levelling the top of the cut-off vertical pipe with concrete.