JPH02164949A - Culvert and manufacture thereof - Google Patents

Abstract

PURPOSE:To secure the stable water stop performance following the displacement of a culvert to be connected by surrounding and burying a flexible water stop member between end faces of coupler sections of two cylindrical concrete members or between one inner periphery and the other outer periphery. CONSTITUTION:An inner formwork 8 and an outer formwork 9 are assembled on a bottom formwork 7, reinforcing bars 10 and 10 are arranged between the inner and outer formworks, a water stop member 2 is arranged on the end face, concrete 11 is placed, and a lower concrete member 1 is manufactured. An outer formwork 9' is extended on it, reinforcing bars 10' and 10' are arranged, concrete 11' is placed, and an upper concrete member 1' is manufactured. The water stop member 2 is surrounded and arranged between end faces of coupler sections of both concrete members 1 and 1' or between one inner periphery and the other outer periphery and buried in both of them.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underdrain having the function of absorbing mutual displacement, and a method for manufacturing the same.

[Problem to be solved by the invention] Concrete 1 that is connected to each other and laid underground such as in a culvert
The joints of the members must not be structured to accommodate changes caused by uneven subsidence of the ground, but conventional joints are made by gluing water-stop rubber and applying mortar to the ground. Because the structure is filled with water, it is not effective against large or shocking displacements, and there is a risk that water-stopping properties may be impaired.

Therefore, the applicant has developed an underdrain structure that absorbs the above displacement by embedding elastic and flexible water-stopping members in both joints of the Nikonkurito part shrine constituting the underdrain. proposed in the issue.

This invention was made based on this previously disclosed invention,
This is an attempt to propose an additional structure for a culvert that solves the problem of displacement.

[Means for Solving the Problems] The present invention "C" is a method of constructing a culvert into a 2 ([1,1 cylindrical
It is made up of L-members, and by connecting these Nikon Cree-I members with flexible water-stopping members, it is made to follow the displacement between adjacent underdrains.

The water supply member is placed around and straddles between the end faces of the joint portions of both concrete members, or between the inner circumferential surface of one concrete member and the outer circumferential surface of the other concrete member, and is embedded in both.

The manufacturing of this culvert consists of assembling the inner formwork and outer formwork at the inner and outer circumferential surfaces of the concrete members into a bottom form-hi, placing reinforcement between the inner and outer formwork, and placing reinforcement at the end face position or at the end. Municipal water members were installed around the circumferential surface of the building, concrete was poured, and the lower water stop member was embedded. This is done in such a way that only one part of the concrete is produced.

[Examples] The present invention will be described below based on drawings showing examples.

First, the invention described in the first claim will be explained.

The underdrain C of this invention is an example of hook culver 1, as shown in Figure 1, which consists of two cylindrical concrete parts + AI.
, 1 are connected by city water member 2, and as shown in No. 5 and 1, they are connected to normal culverts c' and c', and this culvert
It follows the relative displacement between C and C and constantly maintains the water quality.

The city water member 2 is stretchable and made of flexible +A material, and wraps around the end face of the concrete member 1 in a band shape, and as shown in FIGS. 2 to 4, it is attached to both concrete members 1. It is embedded in and connects the concrete part tt1.1.

Second 1. The embodiment shown in Fig. 4 shows the case where the water stop member 2 is arranged in a single layer, and the embodiment shown in Fig. 3 shows the case where the water stop member 2 is arranged in multiple layers. It was formed.

An elastic joint material 4 is sandwiched between the joint end faces on both sides of the one-ton water section 4A'2 (as shown in the figure) to protect the water stop member 2.

In addition, at the joint part, as shown in Fig. 1-Il, Fig. 2, and Fig. 4, the concrete members 1, 1 connected by the water-stopping member 2 are reinforced against shear deformation, and the concrete members 1, 1 are reinforced against shear deformation by a certain amount of each other. A band plate 3 such as a steel plate that restrains deformation of the concrete member 1 is attached by going around the outer peripheral surface of the concrete member 1.

As shown in FIGS. 2 and 4, the strip 3 spans both concrete members 1.1 and is fixed to one concrete member 1 separately from the other.

A notch 1 is provided on the outer peripheral surface of the concrete member 1 on the other side.
a is formed between both concrete members 1.a and the strip plate 3.
A gap is provided that allows a relative displacement of 1.

A joint material 4 is inserted into the gap between the notch 1a and the strip plate 3, if necessary.

This culvert C is a normal culvert C", C' as shown in Figure 5.
They are placed on the foundation concrete 5 so as to be sandwiched between them, and are connected to each other by PC steel rods 6 inserted through the four corners.

The laying of the culvert C is carried out by lifting the steel rod 14 temporarily inserted between the concrete members 1 and 1, or the holding hardware 12 that is temporarily fixed between the sides, as shown by the chain line in Fig. 1-H. .

The steel rod 14 or the holding hardware 12 is removed after the culvert C is installed.

In the embodiment, box culverts 1 to 1 are shown, but the present underdrain C also includes arch culverts 1 and 1 circular pipe.

Next, the invention described in the second claim will be explained.

As shown in FIG.
Insert between the outer circumferential surface of the
It is a concatenation of I and 1.

An elastic plate 15 such as a steel plate is fixed to the outer periphery of one concrete part 121 on the lower surface side that is in contact with the foundation concrete t□ 5, spanning over the concrete I/member 1 on the other side. As shown in FIG. 6-n, the parts other than the elastic plate 15 are formed by a flange 1b which is continuous with the elastic plate 15 and is integral with the main body of the concrete member 1 and protrudes outward. The forest section has a structure in which the other side concrete member 1 is surrounded by an elastic plate 15 and a flange 1b.

The water stop member 2 is continuously fixed to the inner circumferential surface of the elastic plate 15 and the flange 11, and at the same time is embedded in the outer circumferential surface of the other concrete member 1 so as to be connected between the circumferential surfaces of both concrete members 1, 1. intervene.

This water stop member 2 is fixed by adhesion to the elastic plate 15 portion and by embedding an anchor in the flange 1b portion as shown in the figure, so as to go around between the concrete members 1.1.

The invention according to the third claim is the culvert C according to the second claim, in which, instead of the flange 1b, an elastic plate 15 is continuous from the lower surface side and fixed to the end of one concrete member 1 by going around it. .

In this invention, the water stop member 2 is installed across the inner circumferential surface of the rotating elastic plate 15 and the outer circumferential surface of the other concrete member 1.

Next, the invention described in claim 4 will be explained.

This invention is a method for manufacturing the underdrain C according to the first to third claims.

Construction according to FIG. 7 showing the manufacturing procedure of the first claimed invention.''
An example will be explained.

First, the inner formwork 8 on the inner peripheral surface side and the outer formwork 9 on the outer peripheral surface side of the concrete member 1 are vertically assembled on the bottom formwork 7, and both formworks 8
．． The reinforcing bars 10 of the lower concrete part +41 are arranged between 9 and 9, and the water stop member 2 is installed at the joint part, and concrete 1-11 is poured (+).

Since the member 1.1 to the concrete member 1 is manufactured by dividing into two parts and a lower part, in the illustrated embodiment, for convenience of construction, the inner formwork 8 is divided into parts corresponding to the entire length of the two concrete members 1.1. The outer formwork 9 has a length equal to one minute of the concrete member.

After the concrete 11 hardens, the outer formwork 9 is demolded to produce the lower concrete part shrine 1 in which the water member 2 is embedded. A joint material 4 is installed on each side, and a band plate 3 is installed on the outer peripheral surface as necessary (TII).

Subsequently, an outer formwork 9" having the same length as the inner formwork 8
Conc'J-1 is built around the outer periphery of the member 1, the reinforcing bars 10 of the upper concrete member 1 are arranged and concrete 11 is poured, and the concrete member 1 of the lower part of the water stop member 2 is placed.
Embed the protruding part from (III).

After the concrete 11 has hardened, the outer formwork 9' and the inner formwork 8 are successively demolded (IV, V), and the upper and lower concrete members 1, 1 are lifted up while being held by the holding hardware 12, and the bottom formwork 7 is removed. The underdrain C is manufactured by demolding (Vf).

The holding hardware 12 consists of, for example, a cap nut to be embedded in the concrete member 1, and a port and a plate that are screwed together. be done. The holding hardware 12 may be replaced by the steel rod 14 as described above.

FIG. 8 shows a manufacturing example in which both the inner and outer formworks 8 and 9 have a length of 1.1 minutes for the two concrete members.

In this method, a partition form 1 is placed horizontally in the middle of both formworks 8 and 9.
3 is placed, and the lower concrete member 1 is placed on top of this.
After manufacturing, the outer formwork 9 is demolded, the partition formwork 13 is removed, and the concrete member 1 is lowered to the state shown in Fig. 7-11, followed by Fig. 7-■ Underdrain C is manufactured using the following steps.

The manufacturing procedure of the culvert C of the second or third claimed invention is the same as that of the above-mentioned invention, and when reinforcing the lower concrete member 1, the underside of the culvert C in contact with the foundation concrete I. At the same time, the water supply member 2 is installed so as to go around between the inner circumferential surface of the elastic plate 15 and the inner circumferential surface position of the end of the concrete member 1, and the concrete I.
11 - Manufacture of concrete member 1 - 4 Other than that, construction is carried out in accordance with the method of the fourth aspect of the invention.

(Effect of the invention) This invention is as described above, and the concrete is divided into two parts.
Since the I-members are connected by a flexible water-stopping member to form one underdrain, it is possible to follow the displacement of the underdrain connected to this, and stable water-stopping performance is always ensured.

[Brief explanation of the drawing]

No. 111J-1, n shows a front view, a side view, and Figs.
The figure is a sectional view showing the concrete member joint part, Fig. 5 is a side view showing the installation situation of the culvert, and Fig. 61-1. n is the second
A cross-sectional opening and an end view showing a manufacturing example of the claimed invention, respectively;
Figure 7 - ■ to ■ are elevation views showing the manufacturing procedure of the culvert;
The figure is an elevational view showing another manufacturing procedure. C... culvert, C"... culvert, ■... concrete], parts,
1a...Notch, 2...Water stop member, 3...Strip plate, 4...
Joint material, 5...Foundation concrete, 6...PC steel rod, 7
...Bottom formwork, 8..Inner formwork, 9,9'...Outer formwork, 10..Reinforcing bars, 11..Concrete, 12..Holding hardware, 13..Partition formwork, 14..Steel. Rod, 15...Elastic plate. Figure ■ 1.64949 (6) Figure ■ Figure

Claims (4)

[Claims] (1) A culvert is constructed by connecting two cylindrical concrete members, and a flexible water-stopping member is placed between the joint end faces of the two concrete members, and a flexible water-stopping member is placed between the ends of the joint. A culvert characterized by being embedded in and connected to the culvert. (2) It is a culvert constructed by connecting two cylindrical concrete members, and an elastic plate is fixed to the outer peripheral surface of the joint of one concrete member on the lower surface side, spanning the concrete member on the other side. At the same time, a flange is formed that continuously protrudes outward from this elastic plate and surrounds the other side, and both concrete members have a water stop member that is continuously fixed to the inner peripheral surface of the elastic plate and flange of one concrete member. A culvert characterized by being embedded and connected to the outer peripheral surface of a concrete member on the other side. (3) Instead of a flange, an elastic plate is continuously wrapped around the outer circumferential surface of one concrete member joint, and a water-stopping member straddles between the inner circumferential surface of this elastic plate and the outer circumferential surface of the other concrete member. 3. The underdrain according to claim 2, further comprising: (4) Assemble the inner formwork on the inner circumference side and the outer formwork on the outer circumference side of the concrete members constituting the culvert vertically on the bottom formwork, and place the reinforcing bars of the lower concrete member within the inner and outer formworks. After arranging reinforcement, placing a flexible water-stopping member around the end of the concrete member, and pouring concrete to manufacture a lower concrete member in which the water-stopping member is embedded, A method for manufacturing an culvert that consists of the steps of arranging reinforcing bars for the upper concrete member on the lower concrete member, pouring concrete, embedding a water stop member, and removing the inner and outer formwork after the concrete hardens.