JP7653708B2 - Bridges - Google Patents

Description

The present invention relates to bridges and blocks suitable for them.

Patent Document 1 describes how, in order to easily and efficiently join precast concrete slabs and construct bridges, ground guards are integrally formed on both short sides of the precast concrete slab where the upper part of the truss reinforcement protrudes from the concrete slab.

Patent Document 2 discloses technology aimed at providing a guardrail post and guardrail that can suppress the protrusion of the guardrail post toward the sidewalk while maintaining the construction limit, allowing smooth passage on the sidewalk, and ensures sufficient shock absorption. In this document, the guardrail post is mainly composed of a front flange, a rear flange, and a connecting piece, and is fixed to the ground cover concrete with anchor bolts.

Japanese Patent Application Publication No. 10-252015 JP 2020-84645 A

There is a demand for structures and methods that allow bridges to be constructed or manufactured more efficiently.

One aspect of the present invention is a bridge having a ground cover block with a ground cover extending in the longitudinal direction integrally formed at one end along the longitudinal direction (long side direction) of a precast concrete slab, a deck block arranged adjacent to the other longitudinal end of the ground cover block, and an abutment block supporting both ends facing the longitudinal direction of the ground cover block and both ends facing the longitudinal direction of the deck block. This bridge can be easily and inexpensively installed using a bridge manufacturing or construction method that includes arranging the deck block adjacent to the other longitudinal end of the ground cover block and arranging the deck block so that both ends facing the longitudinal direction of the ground cover block and both ends facing the longitudinal direction of the deck block are supported by the abutment block.

The ground cover blocks, deck blocks and abutment blocks may be made of concrete or may be provided as precast (prefabricated) products in a factory. Each of these ground cover blocks and abutment blocks is included as an aspect of the invention of this application.

The longitudinal ends of the cover blocks and deck blocks are supported by the abutment blocks. This gives the cover blocks and deck blocks the strength to form a superstructure that supports the upper part of the bridge. Therefore, the cover blocks and deck blocks may form the superstructure without using other main structural members such as steel girders. The cover blocks have a higher weight per unit length than the deck blocks due to the presence of the cover. Therefore, the width of the cover blocks may be narrower than that of the deck blocks, reducing the capacity required for cranes and other equipment used in construction, and allowing bridges to be constructed more efficiently and at lower cost.

The ground cover block may include a plurality of holes provided at regular intervals on the upper surface of the ground cover so that posts such as a guard fence can be inserted. The bridge manufacturing method may include attaching a guard fence by inserting posts of the guard fence into the plurality of holes. This allows the bridge to be constructed more efficiently. Each of the plurality of holes may include a large-diameter first hole with a bottom provided so that the post can be inserted, and a small-diameter second hole extending from the bottom of the first hole to the bottom or side of the ground cover block. The bottom or side of the ground cover block is the part that faces the object that the bridge crosses, such as a river, and is not expected to interfere with other structures. Therefore, in the ground cover block during construction, after construction, and before construction, water can be drained from the holes for the posts through the second hole.

The ground cover block may have drainage holes penetrating the ground cover block in the plate portion on the inside of the ground cover. The ground cover block has an L-shaped cross section due to the combination of the ground cover and the plate portion, which makes it easier to maintain strength against the deck block, and is located at the end of the road surface formed by the bridge. The bottom surface of the ground cover block faces the object that the bridge crosses, such as a river, and is not expected to interfere with other structures. Therefore, the drainage holes can be provided simply by holes penetrating the plate portion. The drainage holes may have a wider opening (larger diameter) on the bottom surface side than the opening on the top surface side. The ground cover block may have at least a part cut out so that it reaches the plate portion on the inside of the ground cover. The cut out part can be used as a drainage opening.

The ground protection block may be provided with connection holes for inserting connectors for connecting to the abutment blocks so as to penetrate the inner plate portion of the ground protection block near both ends facing each other in the longitudinal direction. The bridge manufacturing method may include connecting the ground protection block to the abutment blocks arranged at both ends via the connection holes. The abutment blocks arranged at both ends of the bridge can be connected to each other via the ground protection block, which has an L-shaped cross section and high strength, providing a bridge with a more stable structure.

The abutment block may include a raised portion at one of the longitudinal ends of the floor part of the cover block on the inside of the cover, and at one of the longitudinal ends of the deck block. The bridge manufacturing method may include arranging the cover block and deck block so that their longitudinal ends are inside the raised portions of the abutment blocks arranged at those ends. The raised portions of the abutment blocks can more stably support the cover block and deck block.

The precast abutment blocks that constitute the abutments of a bridge may have a foundation that supports the load of the superstructure blocks that extend longitudinally to form the superstructure of the bridge, a support surface provided on a portion of the upper part of the foundation that supports the underside of one of the two ends that face each other in the longitudinal direction of the superstructure blocks, and a rising portion that rises from the support surface and abuts against one of the end faces of the longitudinal ends of the superstructure blocks.

FIG. FIG. 2 is a diagram showing the construction of the bridge shown in FIG. 1 . FIG. 4A, B, and C-C cross-sectional view (c) of the ground cover block shown in FIG. 3. A diagram showing the protective fence installed. FIG. 2 is a perspective view showing an example of an abutment block. A diagram showing the ground cover block attached to the abutment block. A diagram showing some examples of abutment blocks.

Figure 1 shows an overview of a bridge (bridge, bridge structure) according to an embodiment of the present invention. Figure 2 shows how to manufacture (construct) the bridge 1. The bridge 1 is a structure that crosses an obstacle such as a river 2, and includes abutment blocks 10 arranged on both sides 3 of the river 2, ground cover blocks 20 supported by the abutment blocks 10 on both sides and arranged to straddle the river 2, deck blocks 30, and a guardrail (parapet) 40 installed on the ground cover blocks 20. This bridge 1 is installed for the purpose of installing a road 4, etc., while avoiding small obstacles such as a river 2 that is approximately 10 m wide or less. The ground cover blocks 20 and deck blocks 30 form a superstructure 5 (the structure of the part that crosses the obstacle) that supports the upper part of the bridge 1, and the abutment blocks 10 form a substructure 6 that supports the superstructure 5. Therefore, the ground cover blocks 20 and the deck blocks 30 are used as superstructure blocks 50 with a longitudinal length (X direction) of approximately 10 m, or even 5 m or less, that are connected to the abutment blocks 10 on both banks 3.

The guardrail blocks 20 arranged on both sides (both ends) of the bridge 1 in the width direction (Y direction) are concrete blocks in which a guardrail (guardrail portion) 22 extending in the longitudinal direction X is integrally formed at one end 21a of a precast concrete plate 21 along the longitudinal direction (long side direction) X, and may be prefabricated (precast) and mass-produced in a factory. The guardrail block 20 has an end surface 24 that is approximately L-shaped, and includes a guardrail 22 protruding upward and a plate portion 23 extending horizontally inward. The bridge 1 includes guardrail blocks 20 arranged symmetrically on both ends, and the configurations of these are almost the same except for the symmetry. Therefore, the guardrail block 20 on the left side of Figure 1 will be described in more detail below.

The bridge 1 includes a deck block 30 arranged adjacent to the other end 21b along the longitudinal direction X of the ground cover block 20, and an abutment block 10 supporting both ends 29a and 29b of the ground cover block 20 facing the longitudinal direction X and both ends 39a and 39b of the deck block 30 facing the longitudinal direction X. The deck block 30 is typically a PC plate precast into a flat plate shape made of concrete, and may be prefabricated (precast) and mass-produced in a factory. The top surface 31 of the deck block 30 may be flat, or may have an appropriate slope for rainwater drainage, or may have an appropriate pattern such as a lattice or tile for the purpose of anti-slip, etc.

The floor block 30 is precast with a length (width) W3 in the Y direction of a predetermined value in the range of about 1 to 2 m, and one or several pieces are arranged in the width direction Y to match the width of the bridge 1. For example, the width W3 of the floor block 30 is 1.5 m. The width W2 of the ground cover block 20 is narrower (shorter) than the width W3 of the floor block 30, and is set so that the lifting weight of the ground cover block 20 is the same as the weight of the floor block 30, or the weight difference is such that there is no need to change the crane selection when constructing the bridge 1. An example of the width W2 of the ground cover block 20 is 600 mm, but it is not limited to this and may be about 1 m. The ground cover block 20 and the floor block 30, and the floor blocks 30 themselves are arranged in the width direction Y, but they may be arranged so that their ends are in close contact with each other, or they may be arranged with a packing or the like between them, or they may be arranged with an appropriate gap suitable for purposes such as drainage.

The abutment blocks 10 may also be made of concrete, prefabricated (precast) in a factory, and mass-produced. The width W1 of the abutment blocks 10 may also be constant and may be such that the lifting weight does not require changing the crane selection when constructing the bridge 1, for example, the width W1 may be approximately 1 m. The abutment blocks 10 are arranged in a row, with multiple blocks 10 being the same as or longer than the overall width of the ground cover blocks 20 and deck blocks 30 that make up the superstructure 5.

Figure 3 shows the cover block 20. Figure 4(a) shows the back surface 20a of the cover block 20, Figure 4(b) shows the bottom surface 20b of the cover block 20, and Figure 4(c) shows a cross section of the cover (cover portion) 22 of the cover block 20. The cover block 20 has an end surface 24 and a cross section in the width direction Y that is approximately L-shaped, and includes a plate portion 23 that extends flat with an appropriate thickness, and a cover 22 that protrudes upward from the plate portion 23. An example of the thickness of the plate portion 23 is 350 mm, and an example of the thickness of the cover 22 is 600 mm, but these dimensions are not limited to these.

The ground cover block 20 includes a plurality of holes 26 provided at regular intervals on the upper surface 22a of the ground cover 22 so as to insert the posts 41 of the guard fence 40. As shown in FIG. 4(c), these holes 26 include a first hole 26a with a large diameter, for example 160φ, with a bottom, provided so that the posts 41 can be inserted, and a second hole 26c with a small diameter, for example 50φ, extending from the bottom 26b of the first hole 26a to the lower surface (bottom surface) 20b of the ground cover block 29. The second hole 26c with a small diameter for drainage may be provided to penetrate the side surface (back surface) 20a of the ground cover block 20.

Figure 5 shows the state in which the posts 41 of the guardrail (parapet) 40 are inserted into the holes 26 of the guardrail 22 of the guardrail block 20 and the guardrail 40 is attached to the guardrail 22. The guardrail block 20 can have holes 26 for the posts 41 when it is prefabricated in a factory, and the guardrail 40 can be installed at the manufacturing site (construction site) of the bridge 1 by simply inserting the posts 41 into the installation holes 26. This eliminates the need to drive anchors into the guardrail block 20 or fix the supports 41 with bolts or the like. After inserting the posts 41 into the installation holes 26, the gap between the posts 41 and the holes 26 can be filled with mortar or the like. Also, if the guardrail 40 can be attached to the guardrail block 20 with sufficient strength by inserting the posts 41 into the installation holes 26, for example, until they reach the bottom 26b, the gap between the posts 41 and the holes 26 does not need to be filled. Even if rainwater, condensation, etc. enter the installation hole 26, it is automatically drained from the drainage hole 26c, so that the support 41 can be prevented from corroding due to rust, etc. In this bridge 1, basically, other support structures that support the ground cover block 20 from the bottom surface (lower surface) 20b are not required. Therefore, since the bottom surface 20b faces the river 2 in this example, it can be easily drained by providing a hole 26c penetrating the bottom surface 20b. In the ground cover 22 of the ground cover block 20, the back surface (side surface) 20a also does not interfere with other structures and can drain into the river 2. For this reason, the drainage hole 26c penetrating may be provided on the back surface 20a. This drainage hole 26c functions as a drainage hole for the installation hole 26 even when the ground cover block 20 is stored outdoors or transported.

The ground cover block 20 further includes drainage holes 27 provided on the inner plate portion 23 of the ground cover 22 so as to penetrate the ground cover block 20. These drainage holes 27 allow rainwater and the like on the upper surface of the plate portion 23 of the ground cover block 20 and the upper surface 31 of the adjacent floor block 30 to be drained from the bottom surface 20b of the ground cover block 20 into the river 2. The drainage holes 27 may have a larger diameter (opening) on the bottom surface 20b than the diameter (opening) on the upper surface. This can prevent the drainage holes 27 from being clogged with garbage, gravel, and the like. The ground cover block 20 has an L-shaped cross section including the ground cover 22, and is stronger than the floor block 30. Therefore, it is easy to maintain strength even if a structure such as the drainage holes 27 is included, which is missing a part of the cross section. Furthermore, for floor block 30 where heavy objects such as vehicles are expected to pass, the vicinity of the ground cover 22 of the ground cover block 20 does not interfere with the passage of vehicles, and is suitable as an area for providing the drainage holes 27.

The ground cover block 20 may further include a portion (notch) 25 in which at least a part of the ground cover 22 is cut out so as to reach the inner plate portion 23 of the ground cover 22. When a large amount of rainwater occurs and the drainage holes 27 cannot drain it quickly enough, the large amount of rainwater can be drained directly into the river 2 via the notch 25. This prevents a large amount of rainwater from accumulating on the bridge 1 and obstructing traffic, or from being added to the bridge 1 as a load.

The ground cover block 20 may further have connection holes 28 provided so as to penetrate the inner plate portion 23 of the ground cover 22 near both ends 29a and 29b facing each other in the longitudinal direction X. A connector for the abutment block 10 can be inserted through the connection holes 28, and the abutment blocks 10 grounded on both banks 3 can be firmly connected to each other by the high-strength ground cover block 20. In the unlikely event that a condition occurs in which the position of the abutment block 10 is easily shifted due to an earthquake or flooding, the spacing between the abutment blocks 10 on both banks 3 can be maintained via the ground cover blocks 20 on both sides, thereby preventing the floor block 30 from falling.

Figure 6 shows an example of a precast abutment block 10 that constitutes the abutment (substructure) 6 of the bridge 1. This abutment block 10 has a foundation (main body) 11 that supports the load of the superstructure block 50, which in this example is the ground cover block 20 and the deck block 30, extending in the longitudinal direction to constitute the superstructure 5 of the bridge 1, a support surface 12 provided on a part of the upper part of the foundation 11 that supports the underside of one of the two ends facing the longitudinal direction X of the superstructure block 50, and a rising portion 13 that rises from the support surface 12 and abuts on one of the end faces of the superstructure block 50 at both ends in the longitudinal direction X. In this example, the support surface 12 supports the lower surface (bottom surface) of one of the ends 29a and 29b of the ground cover block 20 and one of the ends 39a and 39b of the floor block 30, and the rising portion 13 abuts against one of the ends 29a and 29b of the ground cover block 20 and one of the end surfaces of the ends 39a and 39b of the floor block 30, preventing these blocks 20 and 30 from moving in the longitudinal direction X. An anchor hole 18 may be provided on the support surface 12 of the abutment block 10 at a position facing the connection hole 28 provided in the ground cover block 20. The abutment block 10 shown in FIG. 6 is an example of a gravity type, but the abutment block 10 may have an L-shaped or inverted T-shaped foundation.

Figure 7 shows the state in which the abutment block 10 is combined with the ground protection block 20. The bridge 1 can be constructed by placing the ground protection block 20 on the abutment block 10 so that the bottom surface 29c of one end 29a of the ground protection block 20 is placed on the upper support surface 12 of the base portion 11 of the abutment block 10 and the end surface 29d of the one end 29a abuts the rising portion 13. The rising portion 13 acts as a stopper, preventing the ground protection block 20 from moving in the longitudinal direction X. The deck block 30 can also be mounted on the abutment block 10 in the same way. A packing or the like may be placed between the abutment block 10 and the ground protection block 20 or the deck block 30.

Furthermore, anchors 19 such as rebars may be inserted through connection holes 28 provided in the ground cover block 20 and anchor holes 18 provided in the support surface 12 of the abutment block 10, and these holes 28 and 18 may be filled with mortar or the like. The anchors 19 can suppress the movement of the abutment blocks 10 on both banks relative to the ground cover block 20, and even if a situation occurs in which the abutment blocks 10 move due to a flood, earthquake, etc., the movement of the abutment blocks 10 can be suppressed, and the deck block 30 can be prevented from falling from the abutment blocks 10.

In addition, by designing the upper surface 13a of the rising portion 13 to be at the same height as the upper surface 23a of the plate portion 23 of the ground cover block 20 or the upper surface 31 of the deck block 30, the bridge 1 can be constructed without creating a step between the upper surfaces of the ground cover block 20 and the deck block 30 relative to the abutment block 10. When constructing a road 4 such as asphalt, a base without steps can be provided.

The foundation 11 of the abutment block 10 may have a sufficient weight and contact area to be stable as the foundation of the bridge 1. Thus, an example of the foundation 11 is one in which the contact surface (bottom surface) 15 that contacts the ground 9 has a trapezoidal or semi-trapezoidal cross section that is wider than the top. The shape of the foundation 11 is not limited to a trapezoid, but may be a rectangle, or may have an inverted T-shaped contact surface. Figures 8(a) to (c) show some examples of gravity-type abutment blocks 10. The abutment block 10 may be placed on the sandbank of a river or in the river itself. As with the abutment block 10 shown in Figure 8(b), a configuration may be adopted in which multiple bridge structures 1 can be constructed in succession via the abutment block 10 that includes support surfaces 12 on both sides to bridge the bridge.

As described above, the bridge 1 in this example is manufactured using a ground cover block 20 in which a ground cover 22 extending in the longitudinal direction X is integrally formed at one end 21a along the longitudinal direction X of a precast concrete slab 21. The bridge 1 can be easily manufactured by arranging one or more floor plate blocks 30 adjacent to the other end 21b along the longitudinal direction X of the ground cover block 20, and arranging both ends 29a and 29b of the ground cover block 20 facing the longitudinal direction X and both ends 39a and 39b of the floor plate block 30 facing the longitudinal direction X so that they are supported by the abutment blocks 10 on both banks 3. Since the ground cover block 20 and the floor plate block 30 can be supported by the abutment blocks 10 on both banks, respectively, by designing these blocks 20 and 30 to have sufficient strength as a superstructure, a superstructure supporting the upper part of the bridge 1 can be formed using these blocks 20 and 30. This eliminates the need to install in advance components (vertical beams) that support the deck materials, such as steel girders, as the superstructure of the bridge, and allows the bridge 1 to be manufactured efficiently in a short period of time. In addition, in the bridge 1, a protective fence 40, including handrails and guardrails, is often installed on the ground covering 22, but by creating holes 26 in the ground covering 22 for inserting the posts 41 in advance during prefabrication at the factory, the time required to install the protective fence 40 can be shortened, and the bridge 1 can be manufactured more efficiently.

The bridge 1 of this example can be used as a bridge over a small river 2 of approximately 10 m or less, and each of the ground cover block 20 and the deck block 30 can be crossed in the crossing direction as a single piece, that is, the blocks 20 and 30 can be crossed over the abutment blocks 10 on both banks 3. The bridge 1 of this example is constructed by combining the ground cover block 20 made of a precast deck integrated with the ground cover 22 and the deck block 30 made of a deck without the ground cover. Furthermore, the width W2 of the ground cover block 20 integrated with the ground cover is narrower than the width W3 of the deck block 30 without the ground cover. The maximum crane load is generally determined by the weight of the deck arranged when constructing at the site, but the ground cover block 20 integrated with the ground cover 22 and the deck 23 is heavier because of the attached ground cover. Therefore, by narrowing the width W2 of the ground cover block 20, the bridge 1 can be constructed using the same crane as the deck block 30.

Furthermore, a bridge (bridge) 1 is basically fitted with a parapet (protective fence) 3 to prevent people from falling, but in order to construct the parapet, a ground guard to support the parapet is required. Conventionally, the ground guard has been constructed by casting the ground guard in place after the construction of the decking. Casting the ground guard in place requires a long construction period, and it takes time before the bridge can be opened. Also, construction to attach supports for the parapet and protective fence requires additional construction time after casting the ground guard in place, as it requires driving anchors into the ground guard and attaching the supports. In the ground guard block 20 of this example, holes 26 for attaching supports 41 for the parapet and protective fence are opened in advance in the ground guard 22, so that the bridge 1 can be constructed in a short period of time. Furthermore, construction can be done more cheaply than casting the ground guard in place and then installing the anchors later.

When holes 26 for a parapet or guard fence are provided in a precast guard block 20 with guard fence, there is a risk that the concrete will burst if water accumulates in the holes 26 and freezes during storage at the factory or during construction at the site. For this reason, holes 26 for installing supports are provided through the bridge, and a large-diameter hole 26a for inserting the support 41 of the guard fence 40 and a hole 26c smaller in diameter are provided through the lower surface (bottom surface) 20b of the guard block 20, so that water can drain from the bottom surface and damage can be prevented. A small-diameter hole 26c for draining water may be provided horizontally from the hole 26a of the guard fence. A drain may be provided toward the outside of the bridge, but since the mortar filled during construction of the guard fence may drip from the drain and damage the appearance, it is preferable that the drain hole 26c is provided to open to the bottom surface 20b.

Furthermore, rivers 2 generally have a gradient from upstream to downstream, so rainwater that falls on the deck of bridge 1 flows downstream and accumulates in the ground cover. For this reason, in the bridge 1 of this example, slits 25 are provided partially in the ground cover 22, allowing rainwater to flow into the river 2. Drainage holes 27 may also be provided together with or instead of the slits 25 to allow water to flow.
The above discloses a bridge having a precast concrete slab having a ground cover block with a ground cover extending in the longitudinal direction integrally formed at one end along the longitudinal direction, a floor block arranged adjacent to the other end along the longitudinal direction of the ground cover block, and an abutment block supporting both ends of the ground cover block facing each other in the longitudinal direction and both ends of the floor block facing each other in the longitudinal direction. The ground cover block and the floor block may constitute a superstructure supporting the upper part of the bridge. The width of the ground cover block may be narrower than the width of the floor block. The ground cover block may include a plurality of holes provided at regular intervals on the upper surface of the ground cover so as to insert a support. Each of the plurality of holes may include a first hole with a large diameter and a bottom provided so that the support can be inserted, and a second hole with a small diameter extending from the bottom of the first hole to the lower surface or side surface of the ground cover block. The ground cover block may have a drainage hole penetrating the ground cover block in the inner plate portion of the ground cover. The ground cover block may be cut out so that at least a portion of the ground cover reaches the inner plate portion of the ground cover. The ground cover block may have a connection hole for inserting a connector with the abutment block so as to penetrate the inner plate portion of the ground cover near the two ends facing each other in the longitudinal direction. The abutment block may include a rising portion that corresponds to one of the two ends in the longitudinal direction of the floor portion of the ground cover inside the ground cover and one of the two ends facing each other in the longitudinal direction of the floor plate block.
The above discloses a ground cover block in which a ground cover extending in the longitudinal direction is integrally formed at one end along the longitudinal direction of a precast concrete plate, and both ends facing each other in the longitudinal direction of the ground cover block together with a floor plate block arranged adjacent to the other end along the longitudinal direction of the ground cover block are supported by abutment blocks to form a bridge. The ground cover block may have a width narrower than the width of the floor plate block. The ground cover block may include a plurality of holes provided at regular intervals on the upper surface of the ground cover so that a support pole can be inserted. Each of the plurality of holes in the ground cover block may include a first hole with a bottom and a large diameter provided so that the support pole can be inserted, and a second hole with a small diameter extending from the bottom of the first hole to the lower surface or side surface of the ground cover block. The ground cover block may have a drainage hole penetrating the ground cover block on the inner plate portion of the ground cover. The ground protection block may be cut out so that at least a part of the ground protection block reaches the inner plate portion of the ground protection block. The ground protection block may be provided with connection holes for inserting connectors for connecting to the abutment block so as to penetrate the inner plate portion of the ground protection block near both ends facing each other in the longitudinal direction.
The above discloses a precast abutment block that constitutes the abutment of a bridge, the abutment block having a foundation portion that supports the load of a superstructure block extending in the longitudinal direction to constitute the superstructure of the bridge, a support surface provided on a part of the upper part of the foundation portion that supports the underside of one of the two ends facing each other in the longitudinal direction of the superstructure block, and a rising portion that rises from the support surface and abuts against one end face of one of the two ends in the longitudinal direction of the superstructure block.
The above discloses a method for manufacturing a bridge, which includes arranging a deck block adjacent to the other end along the longitudinal direction of a precast concrete plate, and arranging the deck block so that both ends of the deck block facing in the longitudinal direction and both ends of the deck block facing in the longitudinal direction are supported by abutment blocks. The method may include forming a superstructure supporting the upper part of the bridge with the deck block and the deck block. The deck block may include a plurality of holes provided at regular intervals on the upper surface of the deck so as to insert supports, and may include inserting supports of a guard fence into the plurality of holes to attach the guard fence. The deck block may be provided with connection holes for inserting connectors to the abutment block so as to penetrate the inner plate part of the deck near both ends facing in the longitudinal direction, and may include connecting the deck block to the abutment block arranged at both ends through the connection holes. The abutment block may include a raised portion corresponding to one of the two ends in the longitudinal direction of the floor portion of the ground covering block on the inside of the ground covering, and one of the two ends facing in the longitudinal direction of the floor slab block, and the ground covering block and the floor slab block may be arranged so that both ends facing each other in the longitudinal direction are inside the raised portions of the abutment blocks arranged at those two ends.

1 bridge, 20 ground cover blocks, 30 deck blocks

Claims (18)

A ground cover block having a ground cover extending in the longitudinal direction integrally formed at one end of a precast concrete slab along the longitudinal direction;
a floor plate block arranged adjacent to the other end of the ground covering block along the longitudinal direction;
abutment blocks supporting both ends of the ground cover block facing each other in the longitudinal direction and both ends of the deck block facing each other in the longitudinal direction ,
The ground cover block includes a plurality of holes provided at regular intervals on an upper surface of the ground cover for inserting posts;
A bridge, wherein each of the plurality of holes includes a first hole having a large diameter and a bottom into which the support pillar is inserted, and a second hole having a small diameter extending from the bottom of the first hole to penetrate through to the underside or side of the ground covering block . In claim 1,
A bridge in which the ground protection block has a drainage hole that passes through the ground protection block on the inner plate portion of the ground protection block. A ground cover block having a ground cover extending in the longitudinal direction integrally formed at one end of a precast concrete slab along the longitudinal direction;
a floor plate block arranged adjacent to the other end of the ground covering block along the longitudinal direction;
abutment blocks supporting both ends of the ground cover block facing each other in the longitudinal direction and both ends of the deck block facing each other in the longitudinal direction;
A bridge in which the ground protection block has a drainage hole that passes through the ground protection block on the inner plate portion of the ground protection block. In claim 3,
The bridge, wherein the guardrail block includes a plurality of holes spaced at regular intervals in an upper surface of the guardrail for inserting posts. In claim 4,
A bridge, wherein each of the plurality of holes includes a first hole having a large diameter and a bottom into which the support pillar is inserted, and a second hole having a small diameter extending from the bottom of the first hole to penetrate through to the underside or side of the ground covering block. In any one of claims 1 to 5 ,
A bridge, wherein the ground cover blocks and the deck blocks constitute a superstructure that supports the upper part of the bridge. In any one of claims 1 to 6 ,
A bridge in which the width of the ground cover blocks is narrower than the width of the deck blocks. In any one of claims 1 to 7 ,
A bridge, wherein the guardrail block is cut out so that at least a portion of the guardrail reaches an inner plate portion of the guardrail. In any one of claims 1 to 8 ,
A bridge in which the ground protection block has connection holes for inserting connectors to the abutment block, penetrating the inner plate portion of the ground protection block near both ends facing each other in the longitudinal direction. In any one of claims 1 to 9 ,
The abutment block of the bridge includes a raised portion corresponding to one of both ends in the longitudinal direction of the floor portion inside the ground cover of the ground cover block, and one of both ends opposing each other in the longitudinal direction of the deck block. A ground cover block having a ground cover extending in the longitudinal direction integrally formed at one end of a precast concrete plate along the longitudinal direction,
A bridge is formed by supporting both ends of the ground cover block facing each other in the longitudinal direction on the abutment blocks together with a deck block arranged adjacent to the other end along the longitudinal direction of the ground cover block,
The upper surface of the ground cover includes a plurality of holes provided at regular intervals for inserting posts;
A ground covering block, wherein each of the plurality of holes includes a first hole having a large diameter and a bottom into which the support pole is inserted, and a second hole having a small diameter and extending from the bottom of the first hole through to the underside or side of the ground covering block . In claim 11,
A ground cover block, in which a drainage hole penetrating the ground cover block is provided on an inner plate portion of the ground cover. A ground cover block having a ground cover extending in the longitudinal direction integrally formed at one end of a precast concrete plate along the longitudinal direction,
A bridge is formed by supporting both ends of the ground cover block facing each other in the longitudinal direction on the abutment blocks together with a deck block arranged adjacent to the other end along the longitudinal direction of the ground cover block,
A ground cover block, in which a drainage hole penetrating the ground cover block is provided on an inner plate portion of the ground cover. In claim 13,
The ground cover block includes a plurality of holes at regular intervals on an upper surface of the ground cover for inserting posts therein. In claim 14,
A ground covering block, wherein each of the plurality of holes includes a first hole having a large diameter and a bottom into which the support pole is inserted, and a second hole having a small diameter and extending from the bottom of the first hole through to the underside or side of the ground covering block. In any one of claims 1 to 15 ,
A ground covering block having a width narrower than that of the floorboard block. In any one of claims 11 to 16 ,
A ground covering block, in which at least a portion of the ground covering is cut out to reach an inner plate portion of the ground covering. In any one of claims 11 to 17 ,
A ground protection block having connection holes for inserting connectors to the abutment block, the holes penetrating the inner plate portion of the ground protection block near both ends facing each other in the longitudinal direction.

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