Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.

Abstract: A watertightness testing device (1) for performing a watertightness test of a joined section between joined pipes (2 and 3), the watertightness testing device (1) including a testing device body (21) and a moving operation rod (22) for moving the testing device body (21) in the pipes in a pipe axial direction (B) from outside an end section of the pipes, wherein the moving operation rod (22) is provided in the testing device body (21) and extends along the pipe axial direction (B), main supporting members (61 and 62) for supporting the moving operation rod (22) are provided on the moving operation rod (22) outside the pipe (2), and the main supporting members (61 and 62) have a rotatable main rolling member (75) in a lower end section, the main supporting members (61 and 62) are switchable between a supporting posture (K) in which the main supporting members (61 and 62) support the moving operation rod (22) outside of the pipes and a folded posture in which the main supporting members (61 and 62) are folded i

Abstract: A watertightness testing method for testing watertightness of a joined section (4) where one end section of a second pipe (3) is joined to a first pipe (2), the watertightness testing method including: inserting a testing device body (21) into the first pipe (2); attaching an assembling device (80) to another end section of the second pipe (3); attaching a pulling device (82a) to the assembling device (80) and connecting the pulling device (82a) to a strap-shaped member (112a) having been wound in advance around an outer circumference of the first pipe (2); operating the pulling device (82a) and pulling the strap-shaped member (112a) in a separating direction of the second pipe (3) to have a reaction force generated in the second pipe (3) cause the second pipe (3) to be pulled in a joining direction (G), the one end section of the second pipe (3) to be inserted into the first pipe (2), and the second pipe (3) to be joined to the first pipe (2); and operating a moving operation rod (22) provided in the testing

Abstract: A watertight testing device includes a cylindrical core fit into a pipe joint part, a first seal member for sealing between the outer surface of the core and the inner surface of one pipe, a second seal member for sealing between the outer surface of the core and the inner surface of the other pipe, a first pressing member for pressing and compressing the first seal member into a first seal-member insertion space, a second pressing member for pressing and compressing the second seal member into a second seal-member insertion space, a moving device for moving the first and second pressing members in a pipe axial direction, and a test fluid feeder for feeding a test fluid into a test space.

Abstract: A pipe joining method includes a moving of a first transport trolley with a loaded first pipe and a second transport trolley with a loaded second pipe forward, a joining of one end of the first pipe to another end of a rearmost pipe of a pipeline, a lifting of another end of the first pipe, a moving of the first transport trolley and the second transport trolley backward, a drawing of the first transport trolley from beneath of the first pipe to the near side, a removing of a coupler to separate the first transport trolley and the second transport trolley, a moving of the first transport trolley backward, a drawing of the first transport trolley below the second pipe loaded on the second transport trolley, and a moving of the second transport trolley forward with the first transport trolley.

Abstract: A construction management document creation device includes: a first input processing unit configured to repeat a process of assigning a unique pipe number and a unique joint number in association with pipe attribute information, and thereby generate pipe connection information from which connection relationship between laying pipes is identifiable based on the pipe number and the joint number, and pipe laying information from which a type and a laying position of each laying pipe are identifiable based on the pipe attribute information; a second input processing unit configured to generate assembled condition management information based on assembling procedure confirmation information and assembled condition evaluation information input for each pipe assembling section identified by the joint number; and a document generation processing unit configured to generate a construction management document including a daily construction report based on the pipe connection information, the pipe laying information, a

Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.

Abstract: A pipe joint structure provided with: a heel section configured so that a spigot formed on the end section of a pipe is inserted via a seal member into a socket formed in the end section of another pipe and seal member is fitted to a recessed section formed on the inner circumferential section of the socket; and a valve section compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. Additionally, a marker member is provided to the heel section that is accommodated in the recessed section. The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member is detected.

Abstract: A pipe joint structure provided with: a heel section configured so that a spigot formed on the end section of a pipe is inserted via a seal member into a socket formed in the end section of another pipe and seal member is fitted to a recessed section formed on the inner circumferential section of the socket; and a valve section compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. Additionally, a marker member is provided to the heel section that is accommodated in the recessed section. The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member is detected.