JP3263355B2 - Pavement method for road surfaces including manholes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for paving a road including a manhole, a method for installing a manhole, a method for removing a pavement plate, and an expansion anchor and a temporary lid used for carrying out the method.

[0002]

2. Description of the Related Art Cracking or damage of existing pavement surfaces, and insufficiency of pavement thickness due to abrasion of pavement road surface caused by running vehicles are repaired with overlays. And the workability is significantly reduced. In addition, there was an inconvenience that the compaction around the manhole became insufficient and the road surface sank after the traffic was opened. Therefore, the present inventor has disclosed in Japanese Patent No.
As disclosed in Japanese Patent Nos. 90, 2623491 and 2623492, a road pavement method capable of sufficiently compacting a manhole has been proposed.

[0003]

Problems to be Solved by the Invention Patent No. 2623491
In the issue, the manhole was covered with a temporary lid, an overlay was constructed, the pavement such as the overlay around the manhole was cut into a circle, and an anchor was driven into the pavement plate, and the pavement plate was pulled up and removed using this anchor. Was.

[0004] However, it is difficult to apply a lifting load evenly to a plurality of anchors, and in some cases, the lifting load is concentrated on one anchor. Asphalt is a viscoelastic material, and is gradually deformed when a load is applied, so that the anchor may come off from the pavement plate, and it may take time to remove the anchor, such as overhauling the anchor. Therefore, an object of the present invention is to provide a method capable of reliably lifting and removing a pavement plate to be removed.

[0005]

Means for Solving the Problems A temporary hole is provided in the temporary lid, the central hole is closed with a closing means, and the temporary hole is installed at a manhole position. Pavement is constructed so as to cover the temporary lid. Cut into a circular shape, penetrate the closing means of the temporary lid, insert an expansion anchor into the center hole, hook the expansion member on the back surface of the temporary lid, remove the cut pavement plate together with the temporary lid, and cut the paved plate. Can be removed without fail.

[0006] An expansion anchor with the expansion member housed inside the anchor body is inserted into a hole provided on the pavement and inserted into a hole provided at the center of the temporary lid. Since the expansion member is rotatably supported on the shaft in an eccentric state, when the expansion member reaches the space below the temporary lid, it automatically rotates by gravity, and rotates by 90 degrees with respect to the anchor body to rotate the anchor body. From the hole and cannot be pulled out of the hole. A release layer is provided on the surface of the temporary lid so that the temporary lid can be easily peeled off from the pavement plate after being lifted. For the release material, for example, various types of release agents or various sheets of roadbed paper or the like are used.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where the present invention is applied to a cutting overlay method will be described. 1 to 10 are views showing the steps of the present invention. (1) The existing pavement 2 around the manhole 1 is cut into a circular shape up to the upper surface of the sloping wall 3 by a rotary road surface circular cutter or a press-fitting cutter 21. (FIG. 1) (2) Cut annular paving slab 4 and manhole cover receiving frame 11
Is removed integrally. (Fig. 2)

(3) A temporary lid 5 of a circular iron plate having a center hole 51 shown in FIG. 11 is prepared, and a gum tape is stuck to the center hole 51 to close it, thereby preventing the paving material to be filled from falling into the manhole. When the temporary lid 5 installed on the upper surface of the sloping wall 3 moves, the center hole is displaced, which hinders the later pavement slab removing operation. Therefore, the cylindrical projection 53 or the rod-shaped projection is provided on the lower surface of the temporary lid 5. Are arranged in a circular shape, and are applied to the inner wall of the inclined wall 3 to prevent movement. Closing means 5 for closing central hole 51
No. 2 is made of a material which has such strength that it can be easily pierced by a drill and does not break under the pressure of the paving material to be filled thereon. A simple closing means 52 is to close the center hole 51 with a gum tape. Further, a door (not shown) that opens with a certain mechanical force or more may be provided in the center hole 51. When the overlay 9 is constructed, the temporary lid 5 is hidden under the overlay, and the center position of the temporary lid 5 is unknown. Therefore, the center position is marked on the road side with a three-point offset to prepare for later work. (Fig. 3)

(4) The temporary lid 5 is filled with the pavement material 7 to the height of the existing pavement 2 and rolled to fill the removed annular pavement plate 4 portion and the temporary lid 5 upper side. In order to reuse the temporary lid 5, the surface of the temporary lid 5 is previously covered with a release material. (FIG. 4)

(5) The surface of the existing pavement 2 is cut, the road surface is flattened, the cut surface 8 is coated with a tack coat or the like, an overlay 9 having a required thickness is applied, and the road pavement is applied. Since the manhole is protected by the temporary lid 5 and there is no protruding portion on the road surface, the overlay 9 can be efficiently and smoothly performed by mechanical construction. (Fig. 5)

(6) The distance from the three marks on the side of the road previously marked is measured, the center position of the temporary lid 5 is determined, and the road surface is marked. Again, the pavement is cut from the overlay 9 to a depth of the upper surface of the inclined wall 3 in a circular shape by a road surface cutting machine. Since the road surface circular cutting machine cuts using water, the mark of the obtained center position has disappeared, and the center of the temporary lid 5 is obtained again by surveying and the road surface is marked. The marked part is perforated with a drill D on the pavement, and the gum tape of the closing means 52 that has closed the center hole 51 of the temporary lid 5 is pierced and penetrated. (FIG. 6)

(7) FIG. 12 and FIG.
The expansion member 62 of the expansion anchor 6 shown in FIG.
Insert in the state stored in 1. When the tip of the expansion anchor 6 passes through the center hole 51 of the temporary lid 5, the expansion member 62 whose rotation has been suppressed by the hole wall rotates and expands to the side,
As shown in FIG. 14, the temporary lid 5 is caught on the lower surface and does not come off. The temporary lid 5 is provided with a cross-shaped beam for reinforcement. (FIG. 7)

(8) The extension anchor 6 is pulled, and FIG.
As shown in (1), it is confirmed that the extension member 62 is caught on the lower surface of the temporary lid and does not come off, a wire is wrapped around the head of the extension anchor 6, and the cut disk-shaped pavement plate 41 is lifted and removed by a crane. Since the expansion member 62 of the expansion anchor 6 is hooked on the lower surface of the temporary lid, and the disc-shaped pavement plate 41 is removed while being placed on the temporary lid 5, it is surely prevented from coming off like a conventional driving type anchor. Can be removed.
(FIG. 8)

(9) Further, the mounting base of the manhole cover receiving frame 11 is adjusted to a required height on the inclined wall 3 by a height adjusting member. The manhole cover receiving frame 11 is set on the installation base, and fine adjustment is performed so that the upper surface matches the surface of the overlay 9. (FIG. 9)

(10) Finally, a paving material 71 such as a quick-set resin cement concrete is filled around the manhole cover receiving frame 11 and is rolled to match the height of the overlay 9.
(FIG. 10)

In order to specify the cutting center from the overlay 9, a known metal detector or the like may be used to search the position of the manhole cover receiving frame 11 therein. The cut paving slab around the manhole cover receiving frame is designed to improve workability and prevent noise and vibration.
No. 8, JP-B-61-52283, JP-B-61-52283
As disclosed in Japanese Patent No. 25844, the manhole cover is removed integrally. In order to remove the cut paving slab and the manhole cover receiving frame integrally, see Japanese Utility Model Application Laid-Open No. 59-156942.
Manhole cover lifting machine and manhole cover receiving frame in which a wedge or an arm which expands and contracts from the inside of the manhole cover receiving frame is inserted between the manhole cover receiving frame and the inclined wall disclosed in Japanese Unexamined Patent Application Publication No. 59-193679. A peeling machine or the like is used as needed.

[0017]

According to the present invention, the expansion anchor is inserted into the center hole provided in the temporary lid, the expanded member is hooked on the back surface of the temporary lid, and the cut disk-shaped pavement plate is supported by the temporary lid and removed. The disc-shaped pavement slab can be removed reliably without slipping out like a mold anchor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cutting process of an existing pavement.

FIG. 2 is a cross-sectional view of a cutting pavement plate removing process.

FIG. 3 is a cross-sectional view of a temporary lid installation process.

FIG. 4 is a sectional view of a paving material filling step on a temporary lid.

FIG. 5 is a sectional view of an overlay step.

FIG. 6 is a process diagram of drilling.

FIG. 7 is a cross-sectional view of an expansion anchor installation process.

FIG. 8 is a sectional view of a disk-shaped pavement plate removing process.

FIG. 9 is a sectional view of a manhole cover receiving frame setting step.

FIG. 10 is a sectional view of a finishing step.

FIG. 11 is a perspective view of a temporary lid.

FIG. 12 is a front view of an expansion anchor.

FIG. 13 is a partial cross-sectional view of an expansion anchor.

FIG. 14 is an explanatory diagram of an expanded state of an expansion anchor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 11 Manhole cover receiving frame 2 Existing pavement 3 Sloping wall 4 Annular pavement plate 41 Disc-shaped pavement plate 5 Temporary lid 6 Expansion anchor 7 Pavement material 8 Cutting surface 9 Overlay

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-116881 (JP, A) JP-A-6-57774 (JP, A) JP-A-7-180365 (JP, A) 93307 (JP, U) JP-A-2-33802 (JP, U) JP-A 54-153676 (JP, U) Patent 2634991 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) E01C 9/00 E01C 9/08 E01C 23/12 E02D 29/12-29/14 E04G 21/16

Claims (4)

(57) [Claims] 1. A method of paving a road including a manhole,
Place the temporary lid with the central hole closed by the closing means at the manhole position, construct a pavement to cover the temporary lid, cut the pavement surface around the manhole into a circular shape, break through the temporary lid closing means and center Insert the expansion anchor into the hole, hook up the expansion member on the back of the temporary lid, pull up the pavement plate with the temporary lid, remove it, install the manhole cover receiving frame, fill the annular part with the pavement, and roll it. Method. 2. A temporary lid having a center hole closed by a closing means is installed at a manhole position, a pavement is constructed so as to cover the temporary lid, the manhole is cut, and a pavement road surface is cut into a circular shape. Break through the means, insert the expansion anchor into the center hole, hook the expansion member on the back of the temporary lid, pull up the cut paving plate together with the temporary lid, remove it, and set the height of the manhole cover receiving frame to match the road surface Manhole construction method. 3. A temporary lid having a central hole closed by a closing means is installed at a manhole position, a pavement is constructed so as to cover the temporary lid, the manhole is surrounded, and a pavement road surface is cut into a circular shape. A pavement slab removing method in which an expansion anchor is inserted into a center hole by piercing the means, and the expanded member is hooked on the back surface of the temporary lid, and the cut paving slab is pulled up and removed together with the temporary lid. 4. A temporary lid used for pavement including a plate having a hole at the center and a manhole comprising a pierceable closing means covering the center hole.