Abstract:
Fixing devices for connecting components, particularly prefabricated concrete members and tubbing stones, consist of pluglike anchors adapted to be forced with elastic deformation into anchor holes, which are formed in the components and are open to the joint between the components. As a result, the anchors are frictionally held in and/or positively locked in the anchor holes. The anchors are substantially stiff and have a peripheral surface which at least in portions intended for a retaining engagement with the inside surface of the anchor hole is designed to be elastically deformable at least in an approximately radial direction. The surface consists at least in these portions of a plastic material which has entropy elasticity.
Abstract:
Segmental tunnel lining for tunnels, galleries and similar underground works, in which individual tubbings, made of reinforced concrete, are braced, in use, with each other both in annular or peripheral direction and in longitudinal direction with the aid of tension rods (3, 4) and corresponding tensioning elements (5). The rods connect neighboring tubbings (1) and extend in channels (2) in the tubbing. To obtain closed joints as planned in a simple and safe way, each tubbing has no less than one anchor element (6), which is firmly connected with the tubbing at least in the built-in state, for the purpose of anchoring the tension rod which effects the connection with the neighboring tubbing; and the tensioning element, which is arranged on the end of the tension rod opposite the anchor element, is freely accessible for the application of a tensioning machine in the direction of the shaft of the tension rod.
Abstract:
A method of producing underground pipes, with pipe sections being pressed ahead into the ground. For each pipe section, at least two partial pipe shells are used which are separated from one another in the longitudinal direction, and are joined about supply lines which are guided through the pipe. The joining process is effected before the pipe section is pressed into the ground. With this method, the supply lines do not have to be interrupted when a new pipe section is introduced. The apparatus for carrying out the method is provided with at least one joining station for joining the partial pipe shells in a precisely fitting manner, and a combining station for interconnecting the partial pipe shells.
Abstract:
Arcuate concrete segments of a tunnel wall are joined together in the circumferential direction by an internally threaded fitting embedded in the end of one segment and a bolt extending through an opening in the end of a peripherally adjacent segment and interengaged with the fitting. Longitudinally adjacent segments are interconnected by bolt openings extending longitudinally through the segments and opening into corresponding enlarged conical recesses at the interface between the segments, a conically tapered positioning ring engaging the recesses, and threaded bolts extending through the longitudinally extending openings through the segments and having threaded ends interengaged with a common coupler member located in the corresponding recesses.
Abstract:
Arcuate concrete segments of a tunnel wall are joined together in the peripheral direction by abutting steel castings embedded and anchored in the segment ends, and nut and bolt assemblies interconnecting the castings. Longitudinally adjacent segments are joined together by arcuate openings through the segments, nesting positioning members at the interface between the segments, and arcuate nut and bolt assemblies extending through the openings and positioning members.
Abstract:
Arcuate concrete segments of a tunnel lining are joined together by means of a recess in a segment edge having a pair of abutment members projecting into the recess to define a constriction therein, the abutment members forming a pair of abutment surfaces facing inwardly of the constriction, and a screw-threaded headed bolt in an adjacent segment, the segments being positioned edge to edge with the bolt inserted in the recess and moved relatively to each other so that the bolt head engages the abutment surfaces. The recess is accessible from inside the lining to allow the bolt head to be tightened.
Abstract:
A tunnel lining comprises a plurality of arcuate segments connected to one another by connecting elements. Each connecting element protrudes from one segment and engages in a recess defined by an adjacent segment. Each recess is considerably larger than the connecting element and contains means for clamping the connecting element to one wall of the recess.
Abstract:
A tunnelling shield has a rearward rotatable part having a spiral rearward end to engage a forward end of a spiral tunnel lining. A drive mechanism rotates the rearward shield part as further tunnel segments are laid one by one in the shield end against the previous segment to be erected. Rams advance the shield as the rearward end rotates to allow a newly erected segment to engage the tunnel wall.
Abstract:
The invention relates to a tunnel lining segments. The drawing shows a tunnel lining segment having a tie member extending circumferentially through the segment. The tie member of one segment is secured to the tie member of an adjacent segment by an articulated coupling device which permits one segment to be rotated with respect to the next segment after securing at the coupling device in assembly of the tunnel ling.
Abstract:
A novel telescoping lining and support structure and method for lining tunnels and shafts is provided in which a plurality of first chordal segments are drawn into a tunnel or shaft hole in a reduced diameter state of compression, expanded diametrically one after another in place in said tunnel or shaft and keyed in the expanded state by a second smaller chordal segment which completes an annular ring segment with the first chordal segment in place.