JPS6011167B2 - Road joint construction method - Google Patents

Description

[Detailed description of the invention] The present invention relates to road joints.

BACKGROUND OF THE INVENTION In many road bridges such as bridge roads and elevated roads, joint members such as a pair of toothed plates or corrugated end plates are engaged with each other at the joint portion of the road to form an uneven joint clearance.

This type of joint needs to prevent rainwater, dust, sewage, etc. falling from vehicles from leaking under the road bridge through the joint clearance. For this reason, conventionally, a water-stopping structure has been developed in which a water-stopping member made of a flexible material such as rubber is bent to match the unevenness of the joint member and is attached to the opposing surface of the joint member to seal the joint clearance. Widely adopted. However, in such a water stop structure, the bent part of the water stop member is weak, so stress is concentrated on this bent part due to the expansion and contraction of the road bridge, easily causing damage to the water stop member. The disadvantage is that it requires a lot of effort and time to attach to the joint member. On the other hand, for example,
As described in Japanese Patent No. 1-51794, there is also a proposal to attach a gutter body to a steel girder below a pair of corrugated end plates facing each other with a joint clearance.

In this case, during construction, the support plate is attached to the steel girder, the gutter body is attached to the support plate with fixtures, the corrugated end plate is then attached to the steel girder, and concrete is poured on the back of the corrugated end plate. The method is to do so. However, with this construction method, it is necessary to install the gutter body in a narrow space between the steel girders, and there is also the troublesome work of attaching the support plate to the steel girder with bolts, making it difficult to install. be. In view of this, the present invention has a multilayer structure in which the concrete part of the road joint is divided into an upper concrete layer and a lower concrete layer, and a gutter body is installed in the lower concrete layer, and a joint member is installed in the upper concrete layer. The present invention provides a construction method in which the parts are installed in sequence, thereby facilitating the construction and improving water-stopping properties.

That is, the road joint construction method according to the present invention includes a step of supporting both sides of a gutter body on opposing surfaces of a pair of opposing support plates to constitute a water stop means, and a step of constructing a water stop means at a road joint. a step of fixing the water stop means to the lower concrete layer by placing it in the gap and pouring concrete on the backs of both supporting plates to form a lower concrete layer;
The method includes the step of fixing the joint member to the upper concrete layer by pouring concrete on the lower concrete layer to form an upper concrete layer. Embodiments of the present invention will be described below based on the drawings.

Example 1 This example is shown in FIG. 1, and is a case where a pair of toothed plates are used as the joint section.

Reference numeral 1 denotes a joint installed at a road joint, in which toothed plates 2, 2 mesh with each other with a joint clearance 4.
Upper concrete layer 3 placed with the road joint gap in place
, 3 with anchor bolts 5, 5.

6 is a key body installed under the tooth shaped plates 2, 2.

The gutter body 6 is made of rubber, synthetic resin, or other metal (for example, copper plate).
It is formed into a U-shaped cross section by a movable body such as, and steel support plates 7, 7 are fixed to the outside of both sides. The support plates 7, 7 are erected on the opposing ends of the main girders 8, 8 with their back surfaces in close contact with the opposing end surfaces of the lower concrete layers 9, 9, and anchors 10, which are protruded from the back surfaces at regular intervals, are installed. 10... are buried in the lower concrete layers 9, 9. The anchor bolt 5 has stepped holes 12 bored at regular intervals in the toothed plate 2.
12... with nuts 13. Further, 14 is a main reinforcement, 15 is a distribution reinforcement, and 17 is a pavement. Next, the construction method of joint 1 will be explained.

First, the water stop means 18 is constructed by fixing both sides of the gutter body 6 to the opposing surfaces of a pair of opposing support plates 7, 7.

An anchor 10 is fixed to the back surface of the support plate 7. This water stop means 18 is placed in the gap between the road joints, and concrete is poured on the back of the support plate 7 to form a lower concrete layer 9. As a result, the anchor 10 is buried in the lower concrete layer 9, and the water stop means 18 is fixed to the lower concrete layer 9. The lower concrete layer 9 can be formed by placing a template in a portion corresponding to the upper concrete layer 3 and pouring slab concrete by a so-called box-cutting method. Next, anchor bolts 5 are placed directly above the lower concrete layer 9 at predetermined intervals in the direction of the road, and concrete is poured on top of the lower concrete layer 9 to form the upper concrete layer 3. Attach tooth plate 2 to nut 13 on 5.
Fix it with. Example 2 This example is shown in FIG. 2, and is a case where a joint 20 including a pair of corrugated end plates 21, 21 as joint members is applied to a PC girder bridge.

The corrugated end plates 21, 21 are interlocked with each other with the convex portions 22, 22 leaving a joint clearance 4, and the support plates 7, 7 supporting the gutter body 6 are attached to the back surface of the corrugated end plates on the concave side. It is characterized by being welded. In the figure, 23 is P with a single-shaped cross section.
In the C girder, 24 is an upper concrete layer, 25 is a lower concrete layer, and 26 and 27 are reinforcing bars protruding from the back surface of the corrugated end plate 21. In this example, the upper end of the support plate 7 is fixed to the corrugated end plate 21, but as in the first embodiment, the support plate 7 may be placed apart below the corrugated end plate 21. During construction, the lower concrete layer 25 is formed in the same manner as in Example 1, and the water stop means is fixed to this lower concrete layer 25, and then the corrugated machine face plates 21, 21 are arranged so that their upper ends are aligned with the road surface. Then, by pouring concrete on the lower concrete layer 25, an upper concrete layer 24 is formed, and the corrugated end plate 21 is fixed to this upper concrete layer 24 with reinforcing bars 26 and 27.

As shown in FIG. 3, a gutter body 30 made of a thin iron plate subjected to anti-corrosion treatment and bent into a substantially V-shaped cross section to provide flexibility and flexibility may also be used.

In addition, as shown in FIG. 4, the gutter body 6 (or gutter body 30)
In some cases, a pair of angle irons are arranged oppositely in an L-shape or an inverted L-shape to form the support plates 31, 31, and fixed between the two. In that case, no anchor is required. As described above, according to the present invention, if the joint member is fixed on the upper concrete layer after the water stop means is fixed on the lower concrete layer, construction of the water stop means becomes easy and the water stop property is improved. By using the lower concrete layer that fixes water-stopping means, temporary filling material is placed on top of this lower concrete layer and paving is performed, and then temporary filling material is placed on top of the lower concrete layer. It becomes possible to adopt the so-called retrofitting method in which the material and pavement are removed and the joint members are constructed, and the excellent effect is obtained that it becomes possible to easily construct joints with high dimensional accuracy.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a perspective view showing a road joint of Embodiment 1 with a part of the road joint cut away and the main parts cut away, and FIG. 2 is a perspective view of the road joint of Embodiment 2. 3 is a sectional view showing another embodiment of the gutter body, and FIG. 4 is a sectional view showing another embodiment of the support plate. 1, 20... Road joint, 2... Tooth plate, 4... Joint play, 3, 24...
... Upper concrete layer, 9, 25 ... Lower concrete layer, 6 ... Gutter body, 7 ... Support plate, 8.
...Main digit. Figure 1 Figure 2 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A water stop means is constructed by supporting both sides of the gutter body on the opposing surfaces of a pair of opposing support plates, and the water stop means is positioned between the gaps in the road joint, and concrete is poured on the backs of both support plates. The water stop means is fixed to the lower concrete layer by setting the water-stopping means to form a lower concrete layer, and by pouring concrete on the lower concrete layer, an upper concrete layer is formed and the joint member is attached to this upper concrete layer. A road joint construction method characterized by fixing in layers.