JPS6225621A - Flexible earthquake-proof joint - Google Patents

Abstract

PURPOSE:To prevent the breakage of a rigid tube by a method in which a projection from a fitting port is provided on one end of a manhole in fitting it to a frame structure, and the inside of the receiving port of a rigid tube provided to the inner surface of the projection is leveled with the wall face of the fitting port of the frame structure. CONSTITUTION:A projection 12 formed as a protruded beam from the fitting portion 11 of a round tubular flexible elastic material is provided in such a way as to project it from a manholes 21, etc., in fitting it to the manhole 21, etc. The inside of the receiving port 13 of a Hume tube 22 provided to the projection 12 is leveled with the periphery of the wall of the manhole fitting port of positioned on the periphery to form a joint body 10. Since the fixed portion between the frame structure, e.g., manhole, and the rigid tube, e.g., Hume tube, etc., is flexible, the bending moment to be applied to the fixed portion can be relieved and the breakage of the rigid tube can be prevented.

Description

[Detailed Description of the Invention] & Invention IFl! Thin iI! Description (Objective of the present invention and points between the prior art) This invention is a method for connecting a manhole, an artificial pond, etc., and a rigid pipe, such as concrete or ceramic pipe, to withstand pressure, and is particularly effective in the event of an earthquake. This article concerns an earthquake-resistant joint made of flexible elastic material.

Conventionally, as a construction method for attaching a rigid pipe to a manhole or similar structure, a V-hole is used as shown in Figure 8.
Insert the neem w5 into the large hole IK mounting hole 2 and fix it with the mortar 6, or fix it with the mortar 6 through the rubber shim ind 7 fitted around the outer circumference of the insertion hole of the humidifier q as shown in Fig. 9. Many connection methods have been used, but most of them have been the rigid connection method shown in Figure 8, in which the tube is connected directly to the manhole and fixed with mortar. For this reason, the conventional rigid connection method is highly susceptible to the influence of Tonosho, and as an improvement to this, the connection means with intervening rubber joints as shown in Figures 9 and 10 are made of a structure that can withstand large external pressures. There was a point of separation. (See Table 1 # of bending test described below)
In other words, soft! In unstable ground such as il ground or embankment ground, breakage accidents occur due to bending moment and shear force due to relative displacement between the pipe and the manhole after construction, and special KJ[
It has been difficult to prevent these damaging accidents by using conventional connection means.

(Problems to be Solved by the Present Invention) The applicant believes that the conventional connection means tends to occur at the joint (root portion) between the starting body (manhole etc. The cause of breakage and cracks is MA
Due to uneven settlement of the board, the movement of diseased structures such as manholes and rigid pipes such as concrete is different (relative displacement).
This is because the hump pipe, etc. becomes cantilevered with respect to the manhole with the mounting point X as the fulcrum, and a large bending moment M4-Q force F is generated at the fulcrum. (The bending moment acting on one point is created by using a 7-lexiple structure at the attachment point X of the manhole structure (build structure) and the rigid pipe such as the humid pipe, and adding a hinge function etc.)
It is necessary to correspond to M and shear force F.

The present invention attempts to connect the mounting part with an elastically flexible joint in order to alleviate the above-mentioned problems of the mounting part Km<bending moment and shear force.

(Structure and Examples of the Present Invention) The flexible seismic joint according to the present invention meets the requirements described in the scope of Patent No. 11 above.

A suitable manner of implementing the present invention will be explained below.

Figures 1 to 7 show flexible seismic joints according to embodiments of the present invention; Figures 1 and 2 are views of one embodiment; Figures 3 and 4;
The figure shows another embodiment, and FIGS. 5 to 7 show examples of installation to a manhole.

In the drawing, the seismic joint of the present invention is 10d and is made of a relatively hard elastic material such as rubber or synthetic resin. ! Constructed in a circular tube shape. Reference numeral 11 indicates an attachment portion to a manhole, etc., 12 indicates a protruding portion formed as a cantilever beam to protrude from the manhole, etc., and 13 indicates a socket into which a fume W or the like is inserted. The inner depth of the socket shall be located at least the same as the outer periphery of the manhole mounting Q wall, or even further outward.

As shown in Fig. M12, in order to solve the problems caused by the conventional method of installing manholes, etc. and hump pipes, etc., the manhole at the base and the knee inlet pipe are separated to prevent them from overlapping, and the distance between them is 7. It is a lexical flexible body, and the bending moment (M) and shear force F applied to the face are
flexibly respond to both. Numeral 14 is a fitting groove for the water-stop backing, and 15 is a U-groove which has the function of absorbing and relieving the transparent load applied to the joint. Reference numeral 16 denotes a protrusion covered on the outer peripheral surface of the main body, which functions to prevent water leakage from the manhole mounting opening and to improve adhesion.

Reference numeral 17 is a high-strength coupler that connects the joint and the concrete pipe connected to it, and reference numeral 18 is a boxwood extending outside the installation part IN, which is shaped to fit tightly against the inner wall surface of the installation opening such as a manhole, and facilitates installation work. This prevents water from leaking. Depending on the size of the structure, attach the box as shown in Figures 3 and 4.
It is sometimes made into a joint body without a brim. In the construction examples shown in FIGS. 5 to 7, 20 is mortar that fills the gap between the hump pipe and the manhole.

The filler may be an adhesive or other filler.

1'' 421 is a manhole, 22 is a fume f, 23 is a manhole installation opening, and 26 is a foundation.

The structure of the present invention is similar to that of a lock (1) it is a flexible body with a circular shape as a whole, and (2) it has a protrusion that protrudes from the installation opening when installed in a manhole etc. That (3
) It functions as a flexible joint body that connects manholes, etc. and fume pipes, etc., and the inner part of the neem 8 socket is located on the same side as the wall surface of the manhole installation opening or is connected to it.

The feature is that it is a flexible seismic joint that composes the above three points.

(Effects of the present invention) The present invention is based on the following: First, the attachment of IK manholes and other rigid pipes to the root portions of rigid pipes is made into a 7-lexiple joint body. There was an effect of reducing the bending moment (k) applied to the face part (1 point) M due to deformation to a large extent as seen by the bending test # shown in Table 1.

Table 1 Bending #Bending angle measurement result table of joint part under heavy load (
Huyume pipe inner diameter 250? (using PL"L) Second, the damage caused by shear force F', which is a through-hole load during earthquakes, especially in Tonosho etc.
Since the amount of displacement against YJ cutting is greatly increased compared to the conventional edge structure and its improved structure, it is a joint that is resistant to ** construction! ! This significantly improves performance.

Thirdly, in the case of a conventional circular manhole, the concrete pipe that becomes the conduit has a large opening along the radiused wall of the manhole, as shown in Figure 13, so the concrete 1 cut in line with this There was a part that separated the ring-shaped screw t installed in the vertical wJS with 1α hybridization, which impaired the strength of the pipe body at the attachment part, but according to the joint of the present invention, the parts shown in Figures 6 and 7 were Since the cut of the pipe body connects the pipes placed in a straight line, the conventional problems with the strength of the pipe are resolved. Therefore, in the case of a manhole where the manhole installation opening is integrated with the socket part 4 as shown in Fig. 10, the distance of the pipe line is specified, resulting in the need for an adjustment pipe in the middle, which is troublesome in construction. However, in the construction using the joint of the present invention, the connection can be easily made by adjusting the dimensions of the hume pipe adjacent to the joint, so there is an advantage that the troublesomeness of the conventional adjustment pipe is eliminated.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
Figure 3 is a side view of Figure 1.
The figure is a side view of Ichi 3 flash, FIG. 5 is a front view showing an example of the joint part of the present invention, FIG. 6 is a plan sectional view of the main part of FIG. 5, and FIG.
The figures are the 1jIsOIFIrWJ diagram in Figure 5, Figure 8 is a plan sectional view showing an example of construction on a conventional manhole, Figure 9 is a plane sectional view of another example of construction, and Figure 10 is a diagram showing installation on a manhole with a socket attached. Fig. 11 is a side sectional view of the main part of Fig. 9, Fig. 12 is a sectional view of the main part showing the same point in the prior art, and Fig. 13 is a cross-sectional view of a circular manhole etc. A sectional view showing a section of the logic is shown. In the figure, 10 is the joint body of the embodiment of the present invention, 11 is the attachment part, 12 is the protrusion part, 13 is the socket, 14 is the fitting groove, 15 is U4.16 is the protrusion, 17 is the high tension band, 18 is the Well,
21 is a manhole, 22 is a hump pipe, 23 is an installation port,
M indicates bending moment, and P indicates shearing force. Application agent Patent attorney Takashi Ishii Figure 1 Figure 2 Figure 5 201. . Figure 6 Figure 7 Figure 8 Figure 9 Figure 12 Figure 13

Claims (1)

[Claims] It is a flexible elastic body having a substantially circular tubular shape, one end of which is tightly fitted into the installation opening of a manhole or other channel structure, and the other end is connected to a rigid pipe such as concrete, and one end of the main body is fitted into the installation opening of the said channel structure. When installed, the main body forms a protruding part that protrudes from the mounting opening as an overhanging beam, and the inner periphery of the protruding part is provided at the back of the insertion socket for a rigid pipe such as concrete, which is used for mounting a manhole or other structure. A flexible seismic joint characterized by being installed at the same level as the mouth wall surface or located outside of this.