JPS587096A - Segment backing method of method of shield construction - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves sequentially assembling segment bodies in the excavated area as the shield is propelled, and sealing by press-fitting an expansion box for injecting filler between each segment body and the excavated surface. Regarding the segment backfilling method of the shield method. Conventionally, in backfilling work in the shield construction method, there was a drawback that the backfilling material leaked into the tail part of the shield and was difficult to avoid.However, in order to solve the above-mentioned drawbacks, the present invention When assembling segment bodies sequentially along the line to form a lining ring, an accordion shutter is telescopically surrounded and hung on the back of the upper segment of each segment body, and a thin steel plate is hung on the upper part in a polymeric manner. to form an expansion box for injecting the filler, inject the filler through an appropriate number of injection holes provided in each segment body, expand the accordion shutter, push the thin steel plate up to the excavation surface, and bring it into close contact with the excavation surface. The present invention provides a method for backfilling segments in the shield construction method, which improves workability by immediately backfilling each segment body as the shield advances. Next, embodiments of the present invention will be described based on the drawings. FIG. 1 is a longitudinal sectional view of the segment main body of the present invention, FIG. 2 is a plan view of the segment main body, and FIG. 3 is a detailed view of the joint portion. The ground to be excavated in the figure/
Immediately assemble the segment body l along the inner surface of the tail part of the shield against the excavated surface of the tunnel 2 created by digging the ground in front of it with the cutting edge of the shield. When forming, an accordion shutter 7 made of rubberized cloth, ' or a cloth-like material is hung on the back side of each segment main body in a polymeric manner so as to surround the upper part of the upper segment S and the lower part of the thin steel plate B so as to be elastic. to form an expansion box for injecting the filler. At this time, the thin steel plate 6 passes through the upper segment 5 through the tips of the piston rods 9 in an appropriate number of anti-shake jacks installed on the segment body q, and connects to the mounting seat provided at the bottom of the thin steel plate B. removably connected to io,
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When backfilling is performed, filler is injected through an appropriate number of filler injection holes/l provided in the segment body, the accordion shutter 7 is expanded, and a thin steel plate t is placed on the excavated surface.
Presser metal fitting /2 that adjusts the fixation between the thin steel plate 6 and the excavation surface by pushing up the lower end of the piston four doves.
By screwing and solidifying the filler material, it is possible to prevent the joint portion 3 from going around or drooping into the dead space llI. Furthermore, after fitting an elastic channel seal/3 around the joint part 3 of each segment main body to prevent water leakage and completing the lining ring, the retainer fitting/2 is removed and installed. The piston rod t is removed from the seat IO and reused in the next process. As described above, in the present invention, each segment body that is assembled as the shield is propelled is injected with filler through the injection hole provided in each segment body, and while the thin steel plate is closely attached to the excavation surface, each segment body is This is a backfilling method in which a lining ring is completed by preventing water leakage with a groove-shaped seal of an elastic body fitted into the joint part of the main body, and according to the present invention, it is a backfilling method of filling material using a conventional bag. Compared to the above, the accordion shutter hooked to the back of the upper segment of each segment body is inflated to prevent the filling material from wrapping around or dripping into the tail part, and there is no failure due to the filling material around the machine. At the same time, it has the function of preventing skin fall due to the method, and the filling material is injected at the same time as the shield is pushed into the space between the excavation surface, so backfilling is carried out reliably and ground subsidence is prevented. . Therefore, the construction safety is improved, the solidification of the segments is faster, the direction of the shield machine can be adjusted at will, meandering correction is easier, and the work efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a segment main body according to an embodiment of the present invention;
FIG. 2 is a plan view of the segment body, and FIG. 3 is a detailed view of the joint. l: Earth 2: Mine shaft 3: Joint part wide; Segment body S; Upper segment 6: Thin steel plate 7: Accordion shutter 1r: Jacket 9 = Piston Rondo IO = Mounting seat ll: Injection hole - 12: Holding metal fitting 13: Groove Shape Seal llI: Dead Space =

Claims (2)

[Claims] (1) An expansion box for injecting the filler is formed by enclosing the upper segment of the segment body and the upper thin steel plate along the inner surface of the tail of the shield, and polymerically hooking the accordion shutter in a telescopic manner, Filler is injected through the injection hole provided in the main body to inflate the accordion shutter, and a jack for preventing vibration is attached to the segment main body, and the tip of the piston rod of the jack is removably connected to a thin steel plate. A method for segment backfilling using the shield method, which is characterized by pushing up the piston rod at the same time as injecting the filler material to bring the thin steel plate into close contact with the excavated surface to prevent the filler material from dripping into the tail section. (2) Rub the accordion shutter with rubber cloth,
or the segment backfilling method of the shield construction method according to claim 4, in which a cloth-like material is used. Method for attaching the segment body of the shield construction method described in Item 11