JPS594799A - Repairing of deformation of shield segment - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for correcting deformation of a shield segment.

Conventionally, in shield construction, there is a method to correct the deformation of the segments that are assembled due to the propulsion of the shield machine by pressing the segments with jacks installed inside the shield, but this method involves slightly loosening the segments. This poses a problem in terms of workability and safety, as it obstructs the passage of vehicles on the rails laid inside the shield.

The present invention solves the above-mentioned drawbacks and provides a shield segment deformation correction method that makes it possible to easily correct the deformation of a segment by inserting a rock bolt into the segment and pressing the segment toward the ground. It is.

Next, the present invention will be explained based on examples.

Fig. 1 is a schematic diagram showing lock bolts arranged in assembled segments of the present invention, Fig. 2 is a detailed view of section A in Fig. 1, and Fig. Figure (b) is a diagram showing the state in which the lock bolt is inserted into the ground side of the segment. In the figure, a ring insertion hole 2 is drilled in advance at a predetermined position in segment 1.
A ring 3 with an internal thread is fitted into the shield, and a contact surface (approximately 30' to 60"
After screwing the stopper 4 having an inclination angle of .

To correct the deformation of the segment 1, a lock bolt 6 of the same diameter, which is inserted through the fixing material injection hole 5 and has the same inclination angle and thread as the stopper 4 at the insertion tip and outer periphery, is rotated into the ring 3. The stopper 4 is pushed out into the ground 7 by inserting it and bringing the tip inclined part into contact with the inclined part of the stopper 4, and rotating the lockbolt 6 as one body, thereby pushing the lockbolt 6 into the ground 7 to a predetermined length. Press fit into.

Further, the fixing material 9 is injected through the fixing material injection hole 5 and fixed to the earth 7, and then the nut 8 is screwed onto the lock bolt 6 to clamp the segment 1.

Therefore, by tightening the nut 8, the segment 1 is moved toward the ground 7 using the lock bolt 6 as a reaction force, and the deformation of the segment 1 is corrected. Note that the number and length of the rock bolts 6 and the type of the fixing material 9 may be determined in accordance with the necessary proof strength depending on the conditions of the ground 7. As described above, the present invention makes it possible to prevent the inflow of earth and sand by the stopper when assembling the segments, and furthermore, deformation of the segments can be easily corrected.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the arrangement of lock bolts in the assembled segments of this invention, Fig. 2 is a detailed view of part A in Fig. 1, and Fig. 2 (a) is an installation diagram of the segments and stopper. , FIG. 2(b) shows a state in which the rock bolt is inserted into the ground side of the segment. 1,...Segment 2,...Ring insertion hole 3,...Ring 4,...Stopping plug 5,...Fixing material injection hole 6,...Rock bolt 7,...Ground 8, Nut 9, Fixing material Figure 1 Figure 2 (A) Figure 2 (B)

Claims (1)

[Claims] A ring with an internal thread is fitted into the ring insertion hole drilled at a predetermined position in the segment, and a stopper with a contact surface with a diagonally cut tip is screwed inside the shield, and then fixed inside. A lock bolt of the same diameter, which passes through the material injection hole and whose insertion tip and outer circumference have the same inclination angle and thread as the stopper, is rotated and inserted into the ring, and is brought into contact with the contact surface of the stopper so that it is integrated. A method for correcting deformation of a shield segment, which is characterized by screwing and clamping a nut onto a rock bolt after it has been pushed into the ground and fixed.