JPH05306505A - Concrete paving construction method - Google Patents

Abstract

PURPOSE:To make unnecessary different kinds of machines, to make easy the quality control of concrete and to eliminate some problems of being wrong with time and method for transferring the concrete, by a method wherein the proportioning, placing and spreading and flattening of the concrete are done by a spreading and flattening machine. CONSTITUTION:A subbase course 7 is formed on a subgrade, and aggregates 9 are dumped, spread and flattened, following which the aggregates 9 are rolled and are sprayed with water. While collecting the aggregates 9, a spreading and flattening machine 21 mixes cement, water and an admixture with the aggregates 9 and places them on the subbase course 7. In this case, a belt conveyer 29, a tank 31, a batching room 33 and a mixer 35 are arranged at the inside of the machine 21 and flattening blades 37, a vibrator 41 and screeds 39, 43 are arranged at the undersurface thereof. Concrete 15 made by mixing the cement, admixture and water with the aggregates 9 by means of agitating blades 3503, is placed on the subbase course 7 through the lower part of a casing 3501. Furthermore, the concrete 15 is laid at the right and left sides of a machine body 23 by rotating the flattening blades 37 and is spread and flattened by the roughly finishing screed 39, the vibrator 41 and the finishing screed 43. After that, the concrete 15 is rolled and compacted by a vibration roller and a joint is constructed, following which pavement is done by forming a concrete plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pavement construction method.

[0002]

2. Description of the Related Art Conventionally, concrete pavement has been constructed by the following first or second construction method. In the first construction method, first, a subbase, an upper subbase, or, if necessary, an asphalt intermediate layer or the like is formed on the subbase. Next, the formwork is installed according to the tension. next,
Take in the ready-mixed concrete transported by dump truck or concrete mixer truck at the receiver. Next, concrete is placed on the roadbed and leveled with a leveling machine. Then concrete is poured into the mesh or pre-assembled rebar and compacted with a vibrator. Next, after finishing the concrete surface with a finishing machine, curing and performing joints with a cutter or the like to form a concrete slab, the formwork is removed to complete the concrete pavement.

The second construction method is a method called a compaction concrete construction method, and first, like the first construction method, a roadbed is formed. Next, the fresh concrete transported by the dump truck or the concrete mixer truck is received by the asphalt finisher, and the concrete is placed on the roadbed by the finisher and spread. Next, the concrete surface is compacted by rolling with a vibrating roller and a tire roller. Next, after curing and construction of joints, a concrete slab is formed and the concrete pavement is completed.

[0004]

However, in the above-mentioned first construction method, a large amount of labor and time are spent in the preparatory process before placing concrete in order to install a formwork or assemble a large machine. , Up to finishing of concrete surface 4
Since it requires ~ 5 large machines, there is a problem that large-scale equipment is required, and there is also a problem that quality control is difficult because fresh concrete is transported. Further, in the second construction method, since super-concrete concrete whose slump is almost zero is used, there is a problem in that careful attention must be paid to the concrete mixing method, the transportation time, and the transportation method. The present invention has been devised in view of the above circumstances, and an object of the present invention is to omit preparation steps such as formwork installation before placing concrete, do not require large-scale equipment, and easily manage quality. It is to provide a construction method for concrete pavement that can be performed.

[0005]

In order to achieve the above-mentioned object, the present invention forms a roadbed, and spreads aggregate on the roadbed,
The feature is that while collecting the spread aggregate, the aggregate, cement, and water are mixed to drive the concrete on the roadbed. Further, the present invention is characterized in that after the aggregate is laid on the roadbed, water is sprinkled on the aggregate. Further, the present invention is characterized in that after the aggregate is laid on the roadbed, the aggregate is rolled.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are construction explanatory diagrams for explaining the method of the present invention. First, as shown in FIG. 1, the roadbed 7 is formed on the roadbed 5 by the bulldozer 1 and the leveling machine 3 as in the conventional case.

Next, the aggregate 9 carried by a dump or the like is dropped on the roadbed 7 and spread by the bulldozer 11 and the leveling machine 3. In this case, the type and amount of the material of the aggregate 9 are determined according to the thickness and quality of the concrete pavement to be constructed.
Next, as shown in FIG. 3, the tire roller 13 rolls the aggregate 9 on the roadbed 7 to spray water.

Subsequently, while collecting the aggregate 9 laid on the roadbed 7, the aggregate 9 is mixed with cement, water and an admixture, and concrete 15 is poured onto the roadbed 7 and laid. These operations are performed by running the leveling machine. Fig. 4 is a side view of the leveling machine, Fig. 5 is a front view of the leveling machine, and Fig. 6 is a schematic side view of the leveling machine. The leveling machine 21 includes a vehicle body 23 and a pair of left and right crawlers 25. A steering person of the leveling machine 21 is placed on the upper portion of the vehicle body 23, and a concrete placing person is placed on the rear portion of the vehicle body 23 to move the crawler 25. It runs by driving.

As shown in FIG. 6, a scraping blade 27 is provided on the lower surface of the front portion of the vehicle body 23.
A belt conveyor 29, a tank 31, a measuring chamber 33, and a mixer 35 are provided in the rear of the vehicle body 23. Further, on the lower surface of the vehicle body 23, a leveling blade 37, a rough finish screed 39, a vibrator 41, and a finish screed 43 facing the rear of the mixer 35 are disposed so as to be adjustable vertically and horizontally. Side plates 45 (FIG. 5) are vertically provided on both sides of the vehicle body 23 inside the crawler 25 from the left and right sides of the leveling blade 37 to the rear.

The scraping blade 27 scrapes the aggregate 9 laid on the roadbed 7 into the vehicle body 23, and a dustproof cloth 2701 is arranged in front of the scraping blade 27.
The belt conveyor 29 conveys the aggregate 9 scraped by the scraping blade 27 backward and drops it into the mixer 35. The belt conveyor 29 is obliquely arranged so that the rear part is located above the front part. ing.

The tank 31 comprises a cement tank 3101 for storing cement, an admixture tank 3103 for storing an admixture, and a water tank 3105 for storing water. Cement measured in a desired amount from each tank 31, The admixture and water are supplied to the measuring chamber 33. And weighing room 3
These cement, admixture, and water are weighed in 3 to a desired amount corresponding to the amount of the aggregate 9, and are dropped in the mixer 35.

The mixer 35 is provided with a casing 3501 for receiving the dropped cement, admixture, water, and aggregate 9. A stirring blade 3503 is rotatably provided in the casing 3501. The stirring blade 3503 allows the cement and admixture to be mixed. Concrete 15 in which water and aggregate 9 are sufficiently kneaded is cast from the lower part of the casing 3501 onto the roadbed 7. The concrete 15 cast on the roadbed 7 is spread on the left and right of the vehicle body 23 by the rotation of the leveling blades 37.
The rough finish screed 39, the vibrator 41, and the finish screed 43, which move with the vehicle, are spread.

After the concrete 15 is leveled, the concrete surface is compacted by the vibrating roller as in the conventional compacting concrete construction method. Then, after curing and construction of joints, a concrete slab is formed and the concrete pavement is completed.

As described above, according to the construction method of this embodiment, it is not necessary to prepare a mold or a large machine, and thus the conventional preparation step before concrete pouring can be omitted. Further, since the mixing of the concrete 15, the pouring and the leveling can be performed by one leveling machine 21, various machines are not required until the finishing of the concrete surface, and the minimum necessary equipment is required. Be able to construct concrete pavement. Moreover, since the cement, the admixture, the water, and the aggregate 9 are mixed above the place where the concrete is placed, the quality control of the concrete becomes easy,
As in the past, it is possible to solve the problem that requires attention to the time and method of transporting concrete.

Further, since only the aggregate 9 is laid on the roadbed 7 in advance and the aggregate 9 is mixed with the cement, the admixture and the water, the laying machine 21 can be made compact. The flattening machine 21 can be conveniently constructed. Further, in the embodiment, since the water is sprayed on the aggregate 9 dropped on the roadbed 7, the mixing work of the aggregate 9 with the cement, the admixture, and the water is efficiently performed in the mixer 35. Further, since the aggregate 9 dropped on the roadbed 7 is rolled, when the vehicle passes through this portion, or
When walking, it does not interfere with the normal ground.

Various structures are conceivable for a machine for collecting the aggregate 9 laid on the roadbed 7, mixing the aggregate 9 with cement and water, and driving the concrete 15 on the roadbed 7. However, it is not limited to the leveling machine 21 of the embodiment.

[0017]

As is clear from the above description, according to the concrete pavement construction method of the present invention, the aggregate is laid on the roadbed, and the aggregate is collected while the aggregate is collected. Since it was designed to mix concrete with cement and water and to drive concrete onto the roadbed, the preparation process before placing concrete can be omitted, large equipment is not required, and concrete quality control can be performed easily. It will be possible.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for forming a roadbed.

FIG. 2 is an explanatory view of laying aggregate on a roadbed.

FIG. 3 is an explanatory view of collecting the aggregate laid on the roadbed, mixing the aggregate, cement, and water, and driving concrete into the roadbed.

FIG. 4 is a side view of the spreader.

FIG. 5 is a front view of the spreader.

FIG. 6 is a schematic side view of the leveling machine.

[Explanation of symbols]

 5 Roadbed 7 Roadbed 9 Aggregate 21 Leveling machine 27 Scraping blade 29 Belt conveyor 31 Tank 33 Measuring chamber 35 Mixer 37 Leveling blade 39,43 Screed

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Saburo Kanamori 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Masashi Nozaki 4-6-15 Sendagaya, Shibuya-ku, Tokyo Share ceremony Company Fujita (72) Inventor Takashi Ariji Fujita Road Co., Ltd. 3-15-8 Nihonbashi, Chuo-ku, Tokyo

Claims (3)

[Claims] 1. A roadbed is formed, and an aggregate is laid on the roadbed. While collecting the laid aggregate, the aggregate is mixed with cement and water and concrete is poured onto the roadbed. A concrete pavement construction method characterized by the following: 2. The method for constructing concrete pavement according to claim 1, wherein the aggregate is laid on the roadbed and then water is sprinkled on the aggregate. 3. The method according to claim 1, wherein after the aggregate is laid on the roadbed, the aggregate is rolled.
The concrete pavement construction method described.