JPS5921899A - Elastic segment - 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 relates to an elastic segment made of an elastic material.

Traditionally, in Japan, where the ground is particularly soft and there are many earthquakes, shielded pipelines made of segments are susceptible to uneven settlement, bending due to earthquakes, shearing, expansion/contraction, twisting, and other external forces, which can easily lead to damage accidents. Aya had a serious problem. Therefore, in recent years, flexible segments have been used that can absorb all the stresses and displacements caused by uneven settlement of the shielded pipelines and earthquakes, such as bending, shearing, expansion/contraction, and torsion. Now installed.

In many conventionally known general flexible segments, a plurality of water-stop rubber bands, elastic bodies, or flexible joints or other telescoping flexible mechanism members are interposed in the telescoping portion between the segment parts on both sides. It has a structure in which the elasticity and elasticity functions are fully imparted to the above-mentioned elasticity operating portion by the action of the elasticity mechanism member.

That is, it has a structure in which a complicated telescoping and flexible mechanism member consisting of various physical and mechanical elements is interposed between the segment parts on both sides, and the structure is extremely complicated and prone to breakdowns and troubles.
Since it is difficult to achieve sufficient flexibility and the cost is very high, it is unavoidable to have an economical disadvantage in installing a large number of shield conduits at various locations where shield conduits are considered necessary. In particular, the function of the telescoping and flexible mechanism was insufficient, and it was not possible to adequately absorb various types of stress and vibrational displacement in an appropriate manner in response to uneven subsidence, earthquakes, and other ground movements. The flexible segments are very heavy, making it inconvenient to handle, transport, and assemble, and also making it difficult to correct errors.

In addition, because conventional flexible segments have a three-part structure consisting of segment parts on both sides and a telescoping mechanism part inserted between them, there are many problems with watertightness between the two parts, and the relationship with the secondary lining. Therefore, there is a need for the development of stretchable flexible segments that are not only economical but also have good stretch flexibility and safe construction.

The present invention provides an entire elastic segment as described below to solve the above-mentioned conventional drawbacks and problems and to meet the needs of the industry.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the elastic segment according to the present invention will be described in detail.

The elastic segment of the present invention is integrally constructed of an elastic material, and has a flexible bellows section on the outer periphery having approximately the same outer diameter as that of the general segment, and has bent flange portions on both sides of the elastic segment. It is characterized by being able to be connected and fixed in a watertight manner. In Figures 1 to 3 of the drawings, reference numeral 3 denotes an elastic segment piece divided into a plurality of pieces, which is integrally made of an elastic material such as rubber.
As shown in the figure, a flexible bellows portion is appropriately provided on the outer periphery having approximately the same outer diameter as the general segment. Bent flange portions 3a, 3a are provided on both left and right sides that serve as radial joints (7 flange on the side surface), and end flanges 3b, 3h are provided on both circumferential ends that serve as circumferential joints between segment pieces. It is being In addition, the elastic segment piece 3 having the above structure is sequentially connected to other adjacent elastic segment pieces through flanges 3b, 3b on both end faces, so that a ring elastic segment is formed by a plurality of elastic segment pieces 3. It is. Now, in the bent flange portions 3a on both sides of the elastic segment piece 3 having the above-mentioned structure, through holes S are formed at several locations, respectively. A metal side plate A is attached to which are integrally fixed several connecting pins // projecting outward through the holes jft, and on the inner surface of the other side (right side) bent flange part 3a, A metal side plate has several insertion holes A' that communicate with the left side of each through hole, and is provided with segment chuck holes each consisting of a plurality of non-return springs 7 in each of the insertion holes A'. is attached. At the end of the general segment ()/ connected to the left side of the elastic segment piece 3, there is a left bent flange portion 3a.
Each segment chuck /3, which is formed by a plurality of integrated check springs /2, is mounted on the seat plate 10 and can be respectively engaged with several connecting pins // that protrude further outward. It is provided. Note that /ll is a cover plate that is widely covered on the outside of each of the segment chucks /3. In addition, at the end of the general segment / connected to the right side of the elastic segment 3, there is a Connecting pins 9, which can be engaged with the respective segment chuck holes, are provided with anchors embedded in their respective bases and protrude outward. Note that λ is a skin plate on the outer periphery of the general segment), and 2a is its bent flange.A metal seat plate 10 is fixed to the inside and surface of the bent flange 2a of the right general segment. The connecting pins 9 each pass through the seat plate 10 and are integrally welded thereto. Therefore, each of the elastic segment pieces 3 is engaged with each segment chuck on the right side, and the corresponding connecting pins are respectively engaged and clamped, and the general segments adjacent to the right side are connected in a watertight manner at the right side bent flange portion 3a. fixed,
In addition, each connecting pin // on the left side is engaged and clamped to each corresponding segment chasor /3, so that the left side adjacent general segment /
It is connected and fixed in a watertight manner. (See Figure 3 of the drawing). /3 is a reaction force bar with an adjustment screw, in which the left and right screw rods /7tl and /7b are respectively screwed to the left and right abutments /za and 71b on both the left and right sides of the central operation part /B, as shown in drawings 2 and 3. As shown in the figure, the elastic segment piece 3 and the acid segments on both sides are removably interposed at three or any number of connection points, respectively.

As shown in FIG.
11. The bar length can be adjusted by pressing /b against the left and right side plates B, respectively, and rotating the left and right screw rods /7a, /7b fully to the left or right at the central operating portion /B. Each of the reaction force bars 75 is a so-called temporary thrust receiving member, and during shield propulsion, the general segments on both sides /, /
It is interposed between the two and is detachably attached so as to connect the two and function as a segment. Next, in Figures t and S of the drawings, as described above, the elastic segments 3 are located at the left and right bent flange portions 3a, 3a.
By engaging the connecting pin //, 9 and the segment chart /32g, the adjacent general segments on both the left and right sides //, /
After being watertightly connected and fixed with the above-mentioned adjoining sides -acid segments /, /, a secondary winding conc') -V
2O secondary lining is performed, but in this case, as shown in FIG.
/.

Left and right side plates with integrated segment chucks R.

3. Extend inwardly and long to form bent portions at the tips, and between the secondary rolled concrete 20.20 of the acid segments on both sides, rubber with a cross-sectional shape of a mouth, etc. Elastic body for secondary winding consisting of / q whole, 7 langes on both sides /
9b, /qh are the secondary winding concrete IJ-to on both sides 20, 20
The web portions/9a are in close contact with the end faces of the double-wound concrete 2o on both sides.

20 It is flush with the inner circumferential surface and has hook portions/warps at both ends.

/qa is interposed in such a way that it is locked to the left and right side plates B, the bent portions Ot a of B, and Ot a. That is, the secondary winding inner elastic body /q, which has a cross-sectional opening shape and is interposed in watertight contact between the secondary winding concrete 20 and 20 of the adjacent acid segments / and / on both sides of the elastic segment pieces 3, Bent flange part 3
a, 3a are latched in relation to each other.

In the drawings, an example is shown in which the means for connecting and fixing the elastic segment with the adjacent acid segment at the bent flange portions on both sides is the engagement of a connecting pin and a segment chuck. It is also possible to use a means such as screwing, and the reaction force bar of the temporary thrust receiving member may have a structure other than the reaction force bar with an adjusting screw shown in the embodiment shown in the drawings.

The elastic segment of the present invention is entirely made of an elastic material such as rubber, and has a structure in which a flexible bellows portion is provided on the outer periphery having approximately the same outer diameter as the acid segment. The structure is extremely simple compared to the previous model, and it can maintain stable durability over a long period of time without causing breakdowns or troubles.It is also lightweight, making it convenient for handling, transportation, and assembly work, and it is also easy to correct errors during construction. There is little time deviation, and in addition to its elasticity and flexibility, it has excellent vibration absorption properties, so when installed in a shielded pipeline, it can be used freely and appropriately due to uneven ground subsidence or earthquakes. It has great effects such as being able to absorb all kinds of stresses and vibration displacements in a complex manner, preventing damage to shielded pipelines and contributing to maintaining the safety of pipelines.

In addition, this elastic segment is made of an elastic material such as rubber, and can be connected and fixed in a watertight manner to the adjacent general segments at the bent flanges on both sides, so there is no need for special finishing on each joint plane. The seams are always in close contact, and the segments themselves act as water seals, providing extremely good watertightness and the excellent effect of maintaining sufficient watertightness over a long period of time. Furthermore, this elastic segment is economical with low manufacturing costs, has good workability, and can correct errors during pipe assembly, contributing to increased construction speed and efficiency.

Furthermore, the inner elastic body for secondary winding, which has a cross-sectional opening shape and is interposed watertightly between the secondary winding concrete of the acid segment on both adjacent sides, is latched in relation to the bent flange portions on both sides. This provides a composite water-stopping effect and maintains stable watertightness.

[Brief explanation of drawings]

The drawings show all the embodiments of the elastic segment of this invention.
FIG. 1 is a front view of the elastic segment piece, FIG. 2 is an open bottom view, and FIG. 3 is an enlarged vertical sectional view of the main part. Figure 1 is a longitudinal sectional front view of the general segment in which the elastic segment is fully interposed, and Figure S is an enlarged longitudinal sectional front view of the same essential part. /,,General segment,2.,Skin plate. 2a, bent flange, 35. Elastic segment piece. 3a: Bent flange portion, 3b: End flange. t6. Flexible bellows part, 11 holes, Otsu, 7 side plates, Otsu a,
Bent part, 4', insertion hole, 75. Check spring. and , segment chuck, q=, aa pin, 101.
Seat plate, //, Connecting bin, /, 2.・Return spring. /31. Segment chuck, /4',, cover plate, /S0
1 counter cover, /Otsu, central operation section, /7a, /7 to 9.
Left and right screw rod, /Ill, /zab...this part, /q0. Internal elastic body for secondary winding, /wa a8. Web department. iqb, flange part, /9 (,, hook part, 20°, secondary roll concrete. k, / /) Fig. 4 Fig. b

Claims (1)

[Claims] / It is integrally made of an elastic material, has a flexible bellows portion on the outer periphery having approximately the same outer diameter as the general segment, and has a flexible bellows portion on the outer periphery that is watertight with the adjacent general segment at the bent flange portions on both sides. An elastic segment characterized by being able to be connected and fixed. 2. The inner elastic body for secondary winding with a U-shaped cross section is interposed watertightly between the secondary winding concrete of the adjacent general segments on both sides,
2. An elastic segment as claimed in claim 1, wherein the elastic segment is adapted to be latched relative to both folded flange portions.