Floor slab connection structure

Abstract

To provide a floor slab connection structure which can be easily and quickly constructed at a construction site, a disaster recovery site, or the like.SOLUTION: A floor slab connection structure 201 is provided with a plurality of floor slabs 202(1) and 202(2) formed mainly of fiber-reinforced concrete and laid along the ground of a road construction part, a connecting tool 232 for detachably connecting edge parts of the adjacent floor slabs 202(1) and 202(2), and a water cut-off structure 234 for sealing the gap between the adjacent floor slabs 202(1) and 202(2).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a deck slab connection structure that is constructed at construction sites, disaster recovery sites, and the like. [Background technology]

[0002] Conventionally, as shown in Patent Document 1, for example, temporary steel plates have been laid on the ground in order to allow construction vehicles and the like to pass easily, and two temporary steel plates laid next to each other have been fastened together with fixing brackets. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-178912 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the temporary steel plate disclosed in Patent Document 1 is used, gaps are generated between the temporary steel plates. Therefore, when the temporary steel plate is used on a soft or muddy ground, water or soil may rise from the gap between the temporary steel plates, causing the temporary steel plate to sink. Therefore, it is considered that the temporary steel plate cannot be installed in a stable state.

[0005] An object of the present invention is to provide a deck slab connection structure that can be constructed in a stable state without sinking at construction sites, disaster recovery sites, and the like. [Means for solving the problem]

[0006] The deck slab connection structure of the present invention is formed primarily from fiber-reinforced concrete and comprises a number of deck slabs laid along the ground of a road construction section, and connectors that detachably connect the edges of adjacent deck slabs, and is provided with a water-stopping structure that seals the gaps between the adjacent deck slabs.

[0007] According to this configuration, since the structure has a water-stopping structure that seals the gaps between the adjacent decks, when the structure is placed on a soft or muddy ground, water or soil will not rise up between one deck and another. Therefore, the deck connection structure can be constructed in a stable state without sinking.

[0008] In addition, it is preferable that the water-stopping structure is an elastic sealing material that is sandwiched between the edges of the adjacent decks.

[0009] According to this configuration, a water-stopping structure can be formed with a compact configuration using the sealing material.

[0010] The sealing material is preferably butyl rubber.

[0011] According to this configuration, by adhering the highly adhesive butyl rubber to the deck, the adhesive strength between the sealing material and the deck is increased, thereby improving the waterproofing effect.

[0012] It is also preferable to provide a biasing device that brings the edges of adjacent decks closer together and applies a biasing force in a direction that compresses the sealing material.

[0013] According to this configuration, by applying a biasing force in a direction compressing the sealing material using the biasing device, the adhesion between the deck and the sealing material can be improved, thereby improving the water-stopping effect.

[0014] The biasing device is preferably a bolt and a nut that apply a biasing force in a direction that compresses the sealing material.

[0015] According to this configuration, the biasing device can be formed with a compact configuration.

[0016] It is also preferable that one deck slab comprises a first box for accommodating the exposed portions of the bolts and a first lid member for sealing the first box, and the other deck slab comprises a second box for accommodating the exposed portions of the bolts and the nuts and a second lid member for sealing the second box.

[0017] According to this configuration, when multiple decks are connected to be used as a deck connection structure, the bolts and nuts can be prevented from corroding by storing the bolts in the first box and the nuts in the second box. Therefore, when disconnecting the multiple decks and removing them, the bolts and nuts can be reliably removed and the multiple decks can be separated and removed. Effect of the Invention

[0018] According to the deck slab connection structure of the present invention, since it is provided with a water-stopping structure that seals the gap between the adjacent decks, when it is placed on a soft or muddy ground, water or soil will not rise up between one deck and the other. Therefore, as a deck slab connection structure, it can be constructed in a stable state without sinking. [Brief description of the drawings]

[0019] [Figure 1] 1A and 1B are a cross-sectional view and a plan view, respectively, showing a first embodiment of a deck slab connection structure according to the present invention. [Diagram 2] FIG. 2 is a perspective view showing the external shape of the deck. [Diagram 3] FIG. 2 is a cross-sectional view showing a safety groove formed on the surface of a deck slab. [Figure 4] FIG. 2 is a perspective view showing a safety groove formed on the surface of a deck slab. [Diagram 5] FIG. 11 is a perspective view showing a modified example of a safety groove formed on the surface of a deck slab. [Figure 6] FIG. 4 is a cross-sectional view showing a second embodiment of the deck slab connection structure according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the deck slab connection structure according to the present invention will be described with reference to the drawings. Note that components with the same reference numerals in each drawing are the same components, and the description thereof will be omitted.

[0021] (First embodiment) A deck slab connection structure 201 according to the present invention will be described with reference to Figs. 1 to 5. The deck slab connection structure 201 is configured by connecting one deck 202(1) and another deck 202(2) via a gap, and sealing the gap with a sealing material 236. The deck slab connection structure 201 is mainly made of fiber-reinforced concrete and includes one deck 202(1) and another deck 202(2) laid along the ground of the road construction section, and a connector 232 that detachably connects the edge portions 230 of the adjacent one deck 202(1) and another deck slab 202(2). The deck slab connection structure 201 also includes a water-stopping structure 234 that seals the edge portions 230 of the adjacent one deck 202(1) and another deck slab 202(2). As shown in Figures 1(a), (b), and 2, recesses 225 having a rectangular shape in plan view are formed on the upper and lower surfaces of the edge of the deck 202 (decor slabs 202(1) and 202(2), hereinafter). The recesses 225 do not necessarily have to be provided, and may be omitted.

[0022] The connector 232 includes a rectangular connector plate 238 in plan view that is disposed in the recesses 225 on the upper and lower surfaces of the edge of the deck 202. The upper connector plate 238 and the lower connector plate 238 are connected by four bolts 240. The water-stopping structure 234 is composed of a sealant 236 sandwiched between the edge portions 230 of the adjacent deck slabs 202. The sealant 236 is, for example, a plate-shaped butyl rubber or foamed resin. Butyl rubber has strong adhesive power, and can enhance the water-stopping effect by adhering to the panel body. Butyl rubber is a product dedicated to adhesion to concrete, and is preferably waterproofed. The butyl rubber is preferably non-vulcanized butyl rubber. When non-vulcanized butyl rubber comes into contact with concrete components, the carboxyl group in the butyl rubber reacts with CaO (calcium oxide) in the concrete, and the butyl rubber adheres firmly to the concrete.

[0023] The deck 202 is made of a fiber-reinforced concrete material obtained by, for example, filling a mold with a mixture of cement, water, and reinforcing fibers, and curing and solidifying it. The material of the cement constituting the deck 202 is not particularly limited, and various cements such as normal Portland cement, high-early-strength Portland cement, and ultra-high-early-strength Portland cement can be used. Among these, it is preferable to use high-early-strength Portland cement in terms of productivity, strength, and the like. If the mixing ratio of water to cement is too high, the strength of the deck 2 tends to decrease, and conversely, if the mixing ratio of water is too low, the fluidity of the cement mixture during molding tends to decrease, hindering moldability. For this reason, the mixing ratio of water to 100 parts by weight of cement is preferably 15 to 60 parts by weight, and more preferably within the range of 15 to 30 parts by weight.

[0024] Examples of the reinforcing fibers include polyvinyl alcohol fibers (vinylon fibers), polyolefin fibers such as polypropylene fibers and polyethylene fibers, aramid fibers, carbon fibers, steel fibers, and glass fibers. The fiber length of the reinforcing fibers is not particularly limited, but is preferably in the range of 15 to 45 mm. If the fiber length of the reinforcing fibers is less than 15 mm, the reinforcing effect tends to be insufficient. A longer fiber length of the reinforcing fibers is advantageous in terms of the reinforcing effect, but on the other hand, the longer the fiber length, the lower the dispersibility, and the reinforcing fibers may be unevenly distributed in the molded body, which may actually reduce the strength of the deck slab 2. In addition, the thickness of the reinforcing fibers is not particularly limited, but fibers of 10 μm to 1000 μm are usually used.

[0025] The amount of reinforcing fiber is preferably 0.2 to 6 parts by weight per 100 parts by weight of cement. If the amount of reinforcing fiber is small, the reinforcing effect is low and the deck strength is also low. The more the amount of reinforcing fiber is, the more advantageous it is in terms of deck reinforcing effect. However, if the amount of reinforcing fiber is excessive, the dispersibility in the cement mixture is poor, the reinforcing fiber is unevenly distributed, and the strength of the deck 2 becomes non-uniform, which may actually reduce the strength of the deck 2. From this viewpoint, the preferable range of the amount of reinforcing fiber is 0.4 to 4 parts by weight per 100 parts by weight of cement.

[0026] The fiber-reinforced concrete material constituting the deck 202 may be porous in order to reduce its weight. Note that "porous" means that air bubbles such as closed air bubbles and open air bubbles are contained inside the deck 202 by using, for example, a foaming agent or a foaming agent. The fiber-reinforced concrete material constituting the deck 202 may further contain a resin foam in order to reduce its weight.

[0027] 3 and 4, the surface of the deck 202 is formed with vertical grooves extending parallel to the vehicle running direction S, i.e., safety grooves consisting of vertical grooves 11 for suppressing lateral skid of the tire T when the vehicle runs through mountainous areas where the road surface is prone to freezing or on roads with sharp curves. Note that, as shown in Fig. 5, a safety groove consisting of lateral grooves 12 extending in a direction perpendicular to the vehicle running direction S may be formed on the surface of the deck.

[0028] To construct the deck slab connection structure 201 of the present invention, first, the deck slab 202 is fabricated in a manufacturing plant or the like, and then transported to the construction site of the deck slab connection structure 201. Then, the N value, which indicates the degree of weakness of the ground G in the road construction portion, is determined, and if the ground is weak, for example, with an N value of 1 or less, a stabilizing sheet may be laid on the ground. After that, multiple deck slabs (including the deck slab 202) are laid on the stabilizing sheet, and the edges of adjacent deck slabs are detachably connected by connectors 232. In this way, the deck slab connection structure 201 is easily formed in which multiple deck slabs are laid along the ground, with the edges of adjacent deck slabs connected by connectors 232.

[0029] According to the deck slab connection structure 201 of the present invention, since it is provided with a water-stopping structure 234 that seals the gap between the adjacent deck slabs 202, when it is placed on a soft or muddy ground, water or soil will not rise up between one deck slab and another. Therefore, the deck slab connection structure 201 can be constructed in a stable state without sinking.

[0030] In addition, the slip resistance value of the deck 202 mainly made of fiber-reinforced concrete is about 80, which is extremely slippery compared to steel plates, which have a slip resistance value of 53, so that construction vehicles and the like can run on it safely.

[0031] In addition, as shown in Patent Document 1, the construction work of the deck slab connection structure 201 can be expedited, and the number of work days can be significantly reduced, even compared to the case where a deck slab connection structure is constructed using a temporary steel plate. For example, when a temporary steel plate with a thickness of 22 mm is used, the mass of the temporary steel plate per square meter is about 172 kg. In contrast, when the deck slab 202 according to the first embodiment with a thickness of 130 mm is used, the mass per square meter is about 140 kg, which is about 22% lighter than the temporary steel plate. Therefore, the construction speed of the deck slab connection structure 201 according to the present invention can be expedited by about 1.5 to 2.2 times compared to the case where a temporary steel plate is used, and there are advantages such as a significant reduction in fixed costs consisting of lease costs for equipment required for construction work.

[0032] Furthermore, by reducing the mass of the deck 202 per square meter while ensuring a sufficient plate thickness, the deck 202 can serve as both the surface layer and the roadbed layer of the deck connection structure 201. Therefore, without the need for leveling work such as laying crushed stone on the ground G, the deck 202 can be laid along the ground G with an uneven surface or soft ground G, and the adjacent decks 202 can be connected with the connectors 232, allowing large vehicles to pass immediately. In addition, the mass per unit volume of the deck 202 can be set to 0.6t / m3 or less, which has the advantage of effectively preventing consolidation settlement on soft ground G or muddy ground G by applying an appropriate buoyancy to the deck 202. Moreover, by releasing the connection state of the adjacent decks 2 with the connectors 32, the deck connection structure 201 can be removed and easily restored to its original state.

[0033] Second embodiment Next, a deck slab connection structure 301 according to the present invention will be described with reference to Fig. 6. The deck slab connection structure 301 is configured such that one deck slab 302(1) and another deck slab 302(2) are connected via a gap, and the gap is sealed by a sealant 336. The deck slab connection structure 301 includes a biasing device 342 that brings the edges of the adjacent one deck slab 302(1) and another deck slab 302(2) closer to each other and applies a biasing force in a direction that compresses the sealant 336. The biasing device 342 is configured of a bolt 344 and a nut 345. The bolt 344 and the nut 345 function as a connector that connects the one deck slab 302(1) and the other deck slab 302(2).

[0034] The first floor slab 302(1) includes a first box 346(1) that houses an exposed portion 344(a) of the bolt 344. The first box 346(1) includes a bottom plate 348(1), a connecting plate 350(1) into which the bolt 344 is screwed, three side plates 352(1), and a first cover member 354(1) that seals the first box 346(1). The first cover member 354(1) is provided with an engagement hole 358(1) into which the head of a vertical bolt 356(1) is inserted and engaged. The vertical bolt 356(1) engaged with the engagement hole 358(1) is screwed into a female screw portion 360(1) fixed on the bottom plate 348(1), whereby the first cover member 354(1) can be detachably fixed to the bottom plate 348(1) to seal the first box 346(1).

[0035] The other deck 302(2) includes a second box 346(2) that stores the exposed portion 344(b) of the bolt 344 and the nut 345. The second box 46(2), like the first deck 302(2), includes a bottom plate 348(2), a connecting plate 350(2), three side plates 352(2), and a second cover member 354(2).

[0036] The materials of the deck 302(1) and the deck 302(2) and the reinforcing fibers contained therein are similar to those of the deck 202(1) and the deck 202(2) shown in FIG.

[0037] According to the deck slab connection structure 301 of the present invention, by tightening the bolts 344 and nuts 345 that connect the adjacent one deck slab 302(1) and the other deck slab 302(2), a force can be applied in the direction in which the one deck slab 302(1) and the other deck slab 302(2) are adjacent to each other, compressing the sealing material 334 and increasing the degree of adhesion between the one deck slab 302(1) and the other deck slab 302(2). This increases the water-stopping effect, and when used on a soft or muddy ground, moisture or soil does not rise up between the one deck slab 302(1) and the other deck slab 302(2). This allows the deck slab connection structure 301 to be constructed in a stable state without sinking.

[0038] In addition, according to the deck slab connection structure 301, when one deck slab 302(1) and another deck slab 302(2) are connected and used, the first cover member 354(1) is fixed to the top of the first box 346(1) by the vertical bolt 356(1) to protect the exposed part 344(a) in the bolt 344, and the second cover member 354(2) is fixed to the top of the second box 346(2) by the vertical bolt 356(2) to protect the exposed part 344(b) in the bolt 344 and the nut 345. Therefore, the bolt 344 and the nut 345 can be prevented from corroding, and the bolt 344 will not fail to come off when the deck slab 302(1) and the deck slab 302(2) are released from the connection. Therefore, the deck slab 302(1) and the deck slab 302(2) can be reliably released from the connection, and the deck slab connection structure 301 can be reliably removed.

[0039] In addition, the first cover member 354(1) also protects the vertical bolt 356(1), and the second cover member 354(2) also protects the vertical bolt 356(2). Therefore, the vertical bolt 356(1) and the vertical bolt 356(2) can be prevented from corroding, and the vertical bolts 356(1) and (2) do not become stuck when the first floor slab 302(1) and the other floor slab 302(2) are released from the connection. Therefore, when the first floor slab 302(1) and the other floor slab 302(2) are released from the connection, the first cover member 354(1) and the second cover member 354(2) do not become stuck. Therefore, by removing the first cover member 354(1) and the second cover member 354(2), the connection between the floor slab 302(1) and the floor slab 302(2) can be reliably released, and the floor slab connection structure 301 can be reliably removed.

[0040] Although the embodiment of the present invention has been described above based on the drawings, the present invention is not limited to the illustrated one and can be embodied in various forms. For example, the use of the deck slab connection structure of the present invention is not limited to a simple road that is a temporary road for a muddy road. For example, the deck slab connection structure of the present invention may be used for an elevated road, a crosswalk, a pedestrian bridge, a parking lot, a runway, etc. In addition, the shape of the deck slab according to the present invention in plan view is not limited to a rectangle, and may be a parallelogram for a parking lot. [Explanation of symbols]

[0041] 201, 301: Deck connection structure 202(1), 302(1): First floor plate 202(2), 302(2): Other floor plates 232: Connector 344: Bolt 345: Nut 334: Sealing material 342: Actuation device 346(1): Box 1 346(2): Box 2 354(1): First cover member 354(2): Second cover member

Claims

1. A plurality of decks formed mainly of fiber-reinforced concrete and laid along the ground of a road construction section; A connector that detachably connects the edges of the adjacent decks, A deck slab connection structure having a water-stopping structure that seals the gaps between the adjacent decks.

2. 2. The deck slab connection structure according to claim 1, wherein the water-stopping structure is an elastic sealing material sandwiched between the edges of the adjacent decks.

3. 3. The deck slab connection structure according to claim 2, wherein the sealing material is butyl rubber.

4. 4. A deck slab connection structure according to claim 2 or 3, further comprising a biasing device that brings the edges of the adjacent decks closer together and applies a biasing force in a direction compressing the sealing material.

5. 5. The deck slab connection structure according to claim 4, wherein the biasing device is a bolt and a nut that apply a biasing force in a direction compressing the sealing material.

6. One deck slab includes a first box that houses an exposed portion of the bolt, and a first cover member that seals the first box, The deck connection structure according to claim 5, wherein the other deck is provided with a second box for storing exposed portions of the bolts and nuts, and a second cover member for sealing the second box.

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