JP4202283B2 - Method for constructing approach section for three-dimensional intersection and method for constructing three-dimensional intersection - Google Patents

Description

  The present invention relates to a method for constructing an approach portion between an existing road and a bridge portion when constructing a three-dimensional intersection, and a method for constructing a three-dimensional intersection using the method.

  Conventionally, in order to build and form a three-dimensional intersection at an intersection of an existing road, a pair of approach portions having road surfaces inclined from the road surface of the existing road to a predetermined height are formed on the existing road before and after the intersection. This is done by building a bridge portion that connects the road surfaces of the pair of approach portions.

  In order to build such a three-dimensional intersection, it is common to block the passage of vehicles on the existing road with a width corresponding to the width of the three-dimensional intersection, and to build the approach portion and the bridge portion in that state. Therefore, during this construction period, the vehicle becomes extremely difficult to pass around the intersection. Further, when the width of the approach portion and the bridge portion is the same as the width of the existing road, all vehicles must pass around the intersection.

Therefore, in the construction of a three-dimensional intersection, it is required to shorten the construction period as much as possible. For example, in the following Patent Document 1, when building a three-dimensional intersection, the road surface of the existing road that intersects is formed in the underground part. The height of the approach portion of the other existing road is lowered and the length of the approach portion is shortened, thereby shortening the construction period of the approach portion. Further, here, the approach portion is made of a bank made of styrene foam or the like to facilitate transportation and enforcement.
JP 2001-207401 A

  However, in order to build a three-dimensional intersection including such an approach part, there is a possibility that the construction period can be shortened, but during the construction period, a part of the vehicle corresponding to the width of the three-dimensional intersection of the existing road The passage of the vehicle is significantly reduced or eliminated, and the passage of the vehicle tends to be extremely difficult around the intersection. As a result, there is a problem that traffic congestion is likely to occur, and the influence on the surrounding area is large due to congestion and detouring.

  Accordingly, an object of the present invention is to provide a method for constructing an approach portion for a three-dimensional intersection and a method for constructing a three-dimensional intersection that can reduce as much as possible the portion where the vehicle is blocked during the construction period of the approach portion. To do.

The method for constructing a three-dimensional intersection approach portion according to claim 1 for solving the above-mentioned problem is a method for constructing a three-dimensional intersection approach portion in a central portion of an existing road through which vehicles can pass in the width direction. Without arranging retaining walls that form both side surfaces of the existing road in the width direction, a large number of preformed block members are arranged and stacked, and the block members adjacent in the horizontal direction and the vertical direction are connected to each other. By forming a block laminated body and paving the upper side of the block laminated body, the width is narrower than the approach portion and the vehicle can pass on the upper surface, and the width direction of the existing road both sides said both sides vehicle leaving the existing road passable width to form an intermediate approach portion, while forming the intermediate approach section, the existing canal of the intermediate approach of the Wherein a portion adjacent to the intermediate approach portion, and is positioned in the intermediate approach portion than the width direction of the side surface of the existing road of the approach portion of the existing road left on both sides in the width direction, the one The vehicle is allowed to pass, and then the upper part of the intermediate approach part is opened and the part of the existing road is blocked, and the upper part of the intermediate approach part and the remaining part of the existing road on both sides was said vehicle is passable state, said by forming a widened part adjacent to both sides in the width direction of the existing road before Symbol intermediate approach in a part, the wider width than the upper portion of the intermediate approach portion The approach portion having a top surface is formed.

In addition to the structure of Claim 1 , the construction method of the approach part for three-dimensional intersections of Claim 2 uses what consists of a polystyrene foam as said block material, and coat | covers the side surface of the said block laminated body with a light-shielding sheet. It is characterized by that.

In addition to the structure of Claim 2, the construction method of the approach part for three-dimensional intersection of Claim 3 is a horizontal direction between many said block materials arranged for every predetermined | prescribed height of the said block laminated body. and forming a concrete layer to be continuous.

In the construction method of the approach part for level crossing according to claim 4, in addition to the structure according to any one of claims 1 to 3, the intermediate approach part is formed and then separated from the side surface of the intermediate approach part. In the position , a pre-formed retaining wall that forms both side surfaces in the width direction of the existing road of the approach portion is installed, and a filling member is filled inside the retaining wall on the side surface side of the intermediate approach portion. A widened portion is formed.

Construction method according to claim 5, in addition to the configuration of claim 3, the retaining wall supporting member for connecting the retaining wall disposed on both sides of the approach portion, between both sides of the intermediate approach portion Embedded in the concrete layer so as to penetrate the intermediate approach portion.

The method for constructing a three-dimensional intersection according to claim 6 is a method of constructing a pair of approach portions at a central portion of an existing road that is present on both sides of the intersection and through which vehicles can be arranged in the width direction. The approach parts are connected by a bridge part to construct a three-dimensional intersection, which is narrower than the approach part and has a width on which the vehicle can pass and the vehicle can pass on both sides. A pair of intermediate approach portions are formed while leaving the existing road in width, and an intermediate bridge portion having a width corresponding to an upper portion of the pair of intermediate approach portions is formed, and then the intermediate approach portion and the intermediate bridge portion By forming a widened portion adjacent to both side surfaces of the intermediate approach portion in a state where the vehicle can pass through the upper surface of the intermediate approach and the existing roads on both sides of the intermediate approach portion, As well as construction of the approach portion with a top surface of the wider width section, characterized by construction of the overpass and widening the intermediate bridging part to a width of the approach portion.

The method for constructing a three-dimensional intersection according to claim 7 includes constructing a pair of approach portions at a central portion of an existing road that exists on both sides of the intersection and through which vehicles can be arranged in the width direction. The approach parts are connected by a bridge part to construct a three-dimensional intersection, which is narrower than the approach part and has a width on which the vehicle can pass and the vehicle can pass on both sides. A pair of intermediate approach portions are formed while leaving the existing road in width, and the bridge portion is formed. Thereafter, the vehicle passes through the intermediate approach portion, the upper surface of the bridge portion, and the existing roads on both sides. in ready, by forming a widened part adjacent to both sides of the intermediate approach portion, for construction of the approach portion with a top surface of the wider width than the upper portion of the intermediate approach portion Characterized by construction of the crossing by the.

In addition to the structure according to claim 7, the method of building a three-dimensional intersection according to claim 8 includes an intermediate portion in which the bridge portion has a width corresponding to the width of the intermediate approach portion, and a pivot portion on the intermediate portion. And a deployment portion provided so as to be deployable in the width direction of the bridge portion, and the intermediate portion is disposed so as to connect between the pair of intermediate approach portions, and then the deployment portion is connected to the bridge. The bridge portion is formed by expanding so as to be widened to the width of the portion .

According to the construction method of the approach part for level crossing according to claim 1, the intermediate approach part that is narrower than the approach part and has a width that allows the vehicle to pass on the upper surface has a width that allows the vehicle to pass on both sides. By leaving the existing road and then forming the widened part adjacent to both side surfaces of the intermediate approach part with the vehicle passing through the upper part of the intermediate approach part and the existing roads on both sides, Since the approach part having the upper surface wider than the upper part of the intermediate approach part is formed, the passage of vehicles corresponding to the width of the intermediate approach part of the existing road is blocked during the construction period of the intermediate approach part. The vehicle can pass on both sides of the intermediate approach section, and during the construction of the widened section, the passage of the vehicle corresponding to the width of the widened section of the existing road is blocked, but the intermediate approach section The surface can be the vehicle traffic. For this reason, it is possible to minimize the portion where the vehicle is blocked from the time when construction of the approach portion is completed until the completion.
In addition, a large number of preformed block materials are stacked and arranged, and an intermediate approach part is formed by pavement the upper side of the arranged block materials, so that work on the construction site can be minimized. Thus, the construction period can be shortened, and the period during which the vehicle is restricted can be shortened.

According to the construction method of the approach part for level crossing according to claim 2 , since the block material is made of foamed polystyrene, the block material is lightweight and easy to transport and arrange, so the construction period can be further shortened. Can do.

According to the construction method of the approach portion for level crossing according to claim 3,
Since a concrete layer that is continuous in the horizontal direction is formed between a plurality of arranged block members at every predetermined height of the block laminate, the strength of the block laminate can be ensured.

  According to the construction method of the approach part for level crossing according to claim 4, after forming the intermediate approach part, a retaining wall formed in advance at a position separated from the side surface of the intermediate approach part is installed. Since the widened part is formed by filling the inside of the retaining wall on the side surface, the construction period for forming the retaining wall at the construction site can be shortened, and both sides of the approach part can be easily supported by the retaining wall. It can be formed accurately. Moreover, since the back surface of the retaining wall is supported by the filling member, the strength of the retaining wall can be ensured.

  According to the construction method of the approach portion for level crossing according to claim 5, the retaining wall support member that connects between the retaining walls arranged on both side surfaces of the approach portion is made to penetrate between both side surfaces of the intermediate approach portion. Since the intermediate approach part is formed by embedding it, the retaining wall can be easily installed by connecting the retaining walls on both sides with the retaining wall support member when forming the widened part. It is possible to prevent falling and fix it securely.

  According to the method of constructing a three-dimensional intersection according to claim 6, during the construction period of the intermediate approach portion and the intermediate bridge portion, the passage of the vehicle corresponding to the width of the intermediate approach portion and the intermediate bridge portion of the existing road is not allowed. Although it is blocked, the vehicle can pass on both sides of the intermediate approach and the intermediate bridge, and during the construction period to form the widened part and widen the intermediate bridge, it corresponds to the width of the widened part of the existing road Although the passage of the vehicle of a part is interrupted | blocked, a vehicle can pass the upper surface of an intermediate | middle approach part and an intermediate | middle bridge part. For this reason, it is possible to minimize the number of portions where the vehicle is blocked during the period from the start of construction of the three-dimensional intersection to the completion thereof.

  According to the method for constructing a three-dimensional intersection according to claim 7, during the construction period of the intermediate approach portion and the bridge portion, the passage of the vehicle corresponding to the width of the intermediate approach portion of the existing road is blocked, Vehicles can pass on both sides of the intermediate approach part and under the bridge part, and during the construction period to form the widened part, the passage of the vehicle corresponding to the width of the widened part of the existing road is blocked, The vehicle can pass through the upper surfaces of the intermediate approach part and the bridge part, and therefore, the part where the vehicle is blocked is reduced as much as possible from the start of the construction of the three-dimensional intersection to the completion thereof.

According to the method for constructing a three-dimensional intersection according to claim 8, the bridge portion is connected to the intermediate portion by a pivotal support portion having a width corresponding to the width of the intermediate approach portion, and is developed in the width direction of the bridge portion. A deployment portion provided in a possible manner, and after the intermediate portion is arranged so as to connect the pair of intermediate approach portions, the development portion is expanded so as to be widened to the width of the bridge portion and the bridge portion Therefore, the deployment portion can be closed and the width can be kept narrow until it is installed between the pair of intermediate approach portions. Therefore, handling such as transportation is easy, and even if it is arranged in another place before installation, the number of parts that obstruct the passage of the vehicle can be reduced.

Embodiments of the present invention will be described below.
[Embodiment 1]

  1 to 7 show this embodiment. In FIG. 1, reference numeral 10 denotes a three-dimensional intersection, which is formed at the intersection of an existing road 12 extending in the left-right direction in the drawing and another existing road 14 extending in the front and back direction of the drawing. The three-dimensional intersection 10 is provided with a pair of approach portions 16 having a road surface 16a inclined from the road surface of the existing road 12 to a predetermined height on the upper surface, and a bridge portion 18 connecting the road surfaces 16a of the pair of approach portions 16. ing.

  As shown in FIGS. 2 to 4, the approach portion 16 has a block laminated body 24 formed by arranging a large number of block members 20 between the retaining walls 25 forming both side surfaces in the width direction and laminating them in a stepped manner. In addition, the roadbed 28 and the pavement 30 are laminated on the upper portion to form an inclined road surface 16a.

Here, as the block material 20, a material formed in advance in a rectangular shape from a material such as polystyrene foam, urethane foam, foam mortar, or cement can be used. Preferably, the unit weight is 0.12 to 0.35 kN. It is preferable to use those having flame retardancy in the range of / m ³ , the deformation coefficient in the range of 5000 to 25000 kN / m ² , and the allowable compressive stress in the range of 90 to 200 kN / m ² . In this embodiment, one made of styrene foam is used.

  In the block laminate 24, a large number of the block members 20 are closely arranged and laminated, and the block members 20 adjacent to each other in the horizontal direction and the vertical direction are flat plate-like portions 21 as shown in FIG. And a fastening fitting 22 provided with a claw portion 23 that protrudes in the vertical direction from the plate-like portion 21 and can be inserted into each block member 20. In addition, a concrete layer 26 is formed in the block laminated body 24 in a horizontal direction at every predetermined height.

  In order to construct the three-dimensional intersection 10 including such an approach part 16, it is performed as follows. In this embodiment, as shown in FIG. 6 (a), the center of an existing road 12 having a center separation zone 11 having a width of about 1 to 2 lanes, for example, and having 6 reciprocating lanes on 3 sides. A three-dimensional intersection 10 is constructed by constructing the approach portion 16 as described above in the portion.

  Here, first, on the existing road 12 on both sides across the intersection, two round trip lanes on one side on the outer side are maintained in a state where the vehicle can pass, and one round trip two lane vehicle on one side on the center side. Block traffic.

  Then, as shown in FIG. 6 (b), the width of the approach portion 16 is narrower than the width of the approach portion 16 to be built in the central portion including the blocked lanes and the central separation band 11 on both sides of the intersection. The pavement is cut down to a length corresponding to the length of the pavement, and concrete is cast to form a flat primary execution yard 32 at a position lower than the road surface 12a of the existing road 12.

  Next, as shown in FIG. 6 (c), one reciprocating two lanes on one side, which are narrower than the approach parts 16 respectively constructed in the primary execution yard 32 and are part of the road surface 16a, are formed on the upper surface 34a. A pair of intermediate approach portions 34 having a partitionable width and the length of the approach portion 16 are formed.

  In this intermediate approach portion 34, first, a large number of block members 20 are closely arranged and laid in the primary execution yard 32, and the plate-like portion 21 of the fastening bracket 22 is placed on the upper surface of the block member 20 adjacent in the horizontal direction. And the nail | claw part 23 is inserted and the adjacent block materials 20 are connected. Next, a large number of block members 20 are closely arranged and stacked on top of each other while inserting the claw portions 23 of the binding fitting 22 into the lower surface, and the adjacent block members 20 are connected in the vertical direction. Thereafter, the block members 24 are formed in a staircase pattern by alternately laminating the binding members 22 and the block members 20. Here, it is preferable to secure the displacement and stacking accuracy of each block member 20 by attaching two or more fastening fittings 22 to the upper surface or the lower surface of one block member 20.

  The block laminate 24 is formed in a stepped shape that rises toward the intersection corresponding to the inclination of the approach portion 16 to be built. At that time, in order to ensure the strength of the block laminated body 24, a continuous concrete layer 26 is formed on the upper surface of a large number of arranged block members 20 for each predetermined height. At this time, as will be described later, a retaining wall support member 36 such as a tie rod used for fixing the retaining wall 25 is embedded in a state where both end portions are exposed through both side surfaces of the intermediate approach portion 34. deep.

  Thereafter, the roadbed 28 is formed of concrete on the upper side of the block laminated body 24, and the upper surface 34 a of the intermediate approach portion 34 is formed by stacking the pavement 30 on the upper surface of the roadbed 28 with asphalt or concrete. Then, one reciprocating two lanes on one side, which is a part of the road surface 16a of the approach portion 16 to be constructed, are partitioned by a temporary height column 39 on the center side of the upper surface 34a. Further, both side surfaces of the block laminated body 24 are covered with a light shielding sheet 38 to prevent discoloration and dirt due to ultraviolet rays of each block member 20, and the formation of the intermediate approach portion 34 is completed.

  In addition, a pair of intermediate approach portions 34 are formed on the existing road 12 on both sides across the intersection in this way, or at the same time, or before and after the bridge, the bridge is constructed corresponding to the width of the pair of intermediate approach portions 34. An intermediate bridge portion having a narrower width than the portion 18 is formed. As shown in FIG. 1, the bridge portion 18 and the intermediate bridge portion are composed of a substructure 40 buried in the ground and a superstructure 42 supported by the substructure 40. Here, the width of the superstructure 42 Is formed so as to be narrower than the width of the bridge portion 18 to be constructed and to have a width corresponding to the intermediate approach portion 34. Thereby, one round trip two lanes of one side can be passed through the intermediate approach part 34 and the intermediate bridge part.

  Next, after forming the pair of intermediate approach portions 34 and the intermediate bridge portion in this way, construction is performed in which the respective widths are expanded to the widths of the approach portion 16 and the bridge portion 18 to be built.

  Here, first, as shown in FIG. 6 (d), one reciprocation 2 on one side which is the outer side of two reciprocating four lanes on one side of the existing road 12 which has been maintained in a state where the vehicle can pass. The lane is further maintained in a state where the vehicle can pass, and the passage of the vehicle in one lane on one side on the central side that is the intermediate approach portion 34 side is blocked.

  At this time, one reciprocating two lanes on one side of the upper surface 34a of the intermediate approach portion 34 are opened. Therefore, at the time of starting this widening work, the vehicle can pass through one reciprocating two lanes on one side of the existing road 12 and one reciprocating two lanes on one side of the upper surface 34a of the intermediate approach part 34, and the intermediate approach part 34 The number of lanes existing during the construction period is not reduced, and two round trip four lanes on one side are maintained in a passable state.

  Then, after regulating the lane in this way, as shown in FIG. 6 (d), paving the length of the approach portion 16 so as to be the width of the approach portion 16 to be built in the blocked lane. By cutting down and placing concrete, a flat secondary execution yard 44 at a position lower than the road surface 12a of the existing road 12 is formed. The secondary enforcement yard 44 is a range in which both outer sides of the primary enforcement yard 32 are widened.

  Next, after removing the light shielding sheets 38 on both side surfaces of the intermediate approach portion 34, as shown in FIG. 6 (e), at positions that become both side surfaces of the approach portion 16 to be built in the secondary enforcement yard 44, A large number of retaining walls 25 are arranged in a state of being separated from each side surface of the intermediate approach portion 34.

  As shown in FIG. 7, the retaining wall 25 is formed in a substantially L shape with steel or the like, and has a hollow structure in which a frame material is combined on the upper side from the lower part 25 a and both front and back surfaces are covered with flat plates. . In addition, each retaining wall 25 has various heights corresponding to the inclination of the approach portion 16, and the retaining wall 25 having a predetermined height or more is configured in a bent structure or a connection structure at an intermediate portion. Yes. Such a retaining wall 25 is previously formed in another place and conveyed to the construction site of the three-dimensional intersection 10. At that time, each retaining wall 25 is hollow and lightweight, and is formed so as to be smaller than a predetermined height, so that handling such as transportation is easy.

  In this embodiment, the retaining wall 25 is hollow and has a connection structure, and can be connected vertically by inserting an insertion portion provided using an equilateral angle steel 25d or the like at the dividing position. Yes.

  In order to install the retaining wall 25 in the secondary enforcement yard 44, first, the anchor wall 25 is arranged with the L-shaped lower portion 25a on the inner side in a state of being separated from each side surface of the intermediate approach portion 34. Secure with 45. At the same time, a retaining wall support member 36 such as a tyrot embedded in the block laminate 24 of the intermediate approach portion 34 so as to penetrate between both side surfaces is provided at a predetermined height of the inner wall surface 25 b of the retaining wall 25. It connects with the to-be-fixed part 25c, and connects between the retaining walls 25 of both sides via the intermediate | middle approach part 34, and fixes. This prevents the retaining walls 25 on both sides from falling.

  Since the retaining wall 25 has a hollow structure, the hollow portion inside the retaining wall 25 may be filled with mortar or the like to reinforce the strength against impact from the vehicle.

  Thereafter, as shown in FIG. 6 (f), the filling member is filled in the gap between the both side surfaces of the intermediate approach portion 34 and the retaining wall 25, and the widened portions 46 are formed on both sides of the intermediate approach portion 34. Here, the same block material 20 as that of the intermediate approach portion 34 is used as the filling member. That is, a large number of block members 20 are arranged and laid in the secondary execution yard 44, the adjacent block members 20 are connected by the fastening hardware 22, and a large number of block members 20 are arranged above the upper block members. The fastening members 22 and the block members 20 are alternately laminated, and the block laminated body 24 is formed between the intermediate approach portion 34 and the retaining wall 25. At this time, mortar or the like may be filled between the block laminate 24 and the retaining wall 25 as a reinforcing material against an impact from the vehicle.

  Thereafter, the road surface 28 including the upper surface 34 a of the intermediate approach portion 34 is formed by forming the roadbed 28 with concrete on the upper side of the block laminated body 24 of the widened portion 46 and laminating the pavement 30 with asphalt or concrete on the upper side of the roadbed 28. The whole is formed. And the formation of the approach part 16 is complete | finished by removing the temporary height column 39 which divided the upper surface 34a of the intermediate | middle approach part 34, and installing the permanent height column 48 in the upper part of the retaining wall 25 of both sides. The road surface 16a of the approach portion 16 formed in this way has a width of two reciprocating four lanes on one side.

  Furthermore, the pair of approach portions 16 are formed on both sides of the intersection in this way, or at the same time, both sides of the intermediate bridge portion are widened to a width corresponding to the width of the pair of approach portions 16. This widening work can be performed by various methods, and widening portions can be connected to both sides of the intermediate bridge portion. Accordingly, one round trip two lanes on one side can be added through the approach portion 16 and the bridge portion 18 to allow passage.

  After that, when the restricted one-way two lanes on one side are opened via the road surface 16a of the approach portion 16, the pair of approach portions 16 and the bridge portion 18 are passed through as shown in FIG. 6 (g). The width of the round trip four lanes is opened by two on one side, thereby completing the three-dimensional intersection 10.

  If the approach portion 16 of the three-dimensional intersection 10 is constructed as described above, the intermediate approach portion 34 is temporarily left with the existing road 12 having a width that allows the vehicle to pass through the upper surface 34a and allows the vehicle to pass on both sides. Next, the vehicle is allowed to pass through the upper surface 34a of the intermediate approach portion 34, and the widened portions 46 are formed on both side surfaces of the intermediate approach portion 34 in a state where the vehicle is allowed to pass through the existing roads 12 on both sides. Therefore, during the construction period of the intermediate approach portion 34, the vehicle can pass two round-trip four lanes on one side of the existing road 12 on both sides of the intermediate approach portion 34, and during the construction period of the widening portion 46, The upper surface 34a of the approach portion 34 and the both sides of the intermediate approach portion 34 can each pass through one round-trip two lanes of the vehicle, and maintain two round-trip four lanes on one side. It can be.

  Therefore, when constructing the approach section 16 or three-dimensional intersection of two round trip four lanes on one side of the existing road 12 with three round trip six lanes, from the time when construction of the approach section 16 is started to completion The vehicle can always pass through two round-trip four lanes on one side, and the portion where the vehicle is blocked can be reduced. Therefore, the inconvenience of vehicle traffic during the construction period of the approach unit 16 can be suppressed, traffic congestion can be prevented or reduced, and the influence on the surrounding area caused by traffic congestion or detouring can be reduced as much as possible. .

  In addition, since the existing road 12 before the construction of the approach portion 16 has an extra width other than the lane such as the median strip 11, the work for forming the widened portion 46 including the intermediate approach portion 34 and the retaining wall 25 is performed. In addition, even when the width of the roadway portion of the existing road 12 is narrow, it is easy to secure the same number of lanes before and after the construction of the approach portion 16, which is preferable. In this case, the extra width of the existing road 12 other than the lane may be adjusted according to the height of the approach portion 16 at the substantially highest point, for example. Even if the width is narrow, it is easy to work and it is easy to secure the same number of lanes before and after building.

  In addition, by transporting and arranging a large number of block members 20 formed in other places in advance, and placing the road bed 28 and the pavement 30 on the upper side of the block laminate 24 composed of the block members 20, the intermediate approach portion 34 is provided. In addition, since the widened portion 46 is formed, it is possible to reduce the work on the construction site as much as possible, shorten the construction period, and shorten the period during which the vehicle is restricted.

  Furthermore, since the block material 20 is made of polystyrene foam, the block material 20 is extremely light, easy to transport and arrange, and the construction period can be further shortened.

  In addition, after the intermediate approach portion 34 is formed, the retaining wall 25 formed in another place is transported and installed at a position separated from the side surface of the intermediate approach portion 34. Since the widened portion 46 is formed by filling the block member 20 and the like with the gap 25, the construction period for forming the retaining wall 25 at the construction site can be shortened, and both side surfaces of the approach portion 16 are disposed on the retaining wall 25. Therefore, it can be formed easily and accurately. And since the back surface of the retaining wall 25 can be supported by the block member 20 grade | etc., The intensity | strength of the retaining wall 25 is securable.

  Further, since the retaining wall support member 36 that connects between the retaining walls 25 arranged on both side surfaces of the approach portion 16 is embedded so as to penetrate between both side surfaces of the intermediate approach portion 34, the intermediate approach portion 34 is formed. When the widened portion 46 is formed, the retaining wall 25 can be easily installed by connecting the retaining walls 25 on both side surfaces by the retaining wall support member 36, and can be securely fixed by preventing overturning. it can.

If the three-dimensional intersection 10 is constructed in this way, the intermediate approach portion 34 and the intermediate bridge portion are formed, and then the intermediate approach portion 34 and the intermediate bridge portion are widened. Therefore, the intermediate approach portion 34 and the intermediate bridge portion are expanded. During the construction period of the part, the vehicle can pass through the existing road 12 on both sides of the intermediate approach part 34 and the intermediate bridge part, and during the period of forming the widened part 46 and widening the intermediate bridge part, Since the vehicle can pass through the upper surfaces of the intermediate approach portion 34 and the intermediate bridge portion, the portion where the vehicle traffic is blocked is reduced as much as possible between the start of construction of the three-dimensional intersection 10 and the completion thereof. it can.
[Embodiment 2]

  In the second embodiment, as in the first embodiment, an example will be described in which the three-dimensional intersection 10 is built on the existing road 12 having three lanes on one side and six lanes by a method different from the first embodiment.

  In the second embodiment, in order to construct a three-dimensional intersection 10 as shown in FIG. 8, first, the vehicle can pass through two roundtrip four lanes on one side on the existing road 12 on both sides across the intersection. In such a state, the passage of the vehicle in one round trip two lanes on one side on the central side is blocked.

  In the same manner as described above, a pair of intermediate approach portions 34 are formed on the existing roads 12 on both sides of the intersection in the blocked lane.

  In addition, a bridge portion 50 is formed to connect the pair of intermediate approach portions 34 simultaneously with the formation of the intermediate approach portion 34 or before and after the intermediate approach portion 34.

  In the bridge portion 50, after forming the substructure 40 in the same manner as described above, the base 51 of the superstructure 42 as shown in FIG. 9A is installed on the substructure 40, and the roadbed 28 and the pavement 30 are provided on the upper surface side. It forms by giving.

  As shown in FIG. 9B, the base 51 of the superstructure 42 is unfolded by being connected to an intermediate part 51a having a width corresponding to the width of the intermediate approach part 34 and a lower part of the intermediate part 51a by a pivotal part 51c. It consists of a possible deployment part 51b. The base 51 is formed in part or in whole at other locations in advance, and is conveyed in a state where the unfolding portion 51b is closed. It is installed by widening to the width of the bridge part 50. Here, various reinforcing members 51d and the like are further attached to ensure the strength.

  In order to arrange the base portion 51 at a predetermined position between the intermediate approach portions 34, a part or all of the lower work 40 may be formed and raised to the upper portion by a lifting device or the like. It may be slid using a slide device or the like up to the upper portion of the substructure 40 after being arranged on the upper surface of the substructure.

  By forming the intermediate approach portion 34 and the bridge portion 50 in this manner, the vehicle can pass through one reciprocating two lanes on one side through the intermediate approach portion 34 and the bridge portion 50. Therefore, the upper part of the intermediate approach part 34 and the bridge part 50 is opened, and one of the two sides of the existing road 12 that has been maintained in a state where the vehicle can pass is one side on both sides of the two reciprocating four lanes. The vehicle is further maintained in a state in which the vehicle can pass back and forth, and the passage of the vehicle in one lane on one side on the central side that is the intermediate approach portion 34 side is blocked.

  Thereafter, in the same manner as in the first embodiment, the width of the pair of intermediate approach portions 34 is expanded to the width of the approach portion 16 to be built, and the formation of the pair of approach portions 16 is completed. As a result, the vehicle can pass through four lanes in two directions on one side through the pair of approach portions 16 and the bridge portion 50, and the construction of the three-dimensional intersection 10 is completed.

  If the three-dimensional intersection 10 is constructed as described above, during the construction period of the intermediate approach portion 34 and the bridge portion 50, the passage of vehicles in the portion corresponding to the width of the intermediate approach portion 34 of the existing road 12 is blocked. However, the vehicle can pass on both sides of the intermediate approach portion 34 and under the bridge portion 50. When installing the base portion 51 of the bridge portion 50 by placing the base portion 51 on the intermediate approach portion 34 and sliding it before installation, the intermediate portion 51a has a width corresponding to the width of the intermediate approach portion 34 and closes the unfolding portion 51b. Therefore, the base 51 is not disposed so as to largely protrude outward from the width of the intermediate approach portion 34. Therefore, even when the vehicle is disposed on the lower side of the intermediate approach portion 34 having an inclination, it is possible to ensure the passage of the vehicle on the existing road 12 adjacent to the intermediate approach portion 34.

  Further, during the construction period for forming the widened portion 46 of the approach portion 16, the passage of the vehicle corresponding to the width of the widened portion 46 of the existing road 12 is blocked, but the intermediate approach portion 34 and the bridge portion 50 The vehicle can pass through the top surface.

  As a result, even if the three-dimensional intersection 10 is constructed as in the second embodiment, the same effect as in the first embodiment can be obtained, and the vehicle It is possible to minimize the portion where traffic is blocked.

  Further, if the three-dimensional intersection 10 is constructed using such a base 51, the base 51 includes an intermediate portion 51a and a deployable portion 51b provided in the intermediate portion 51a so as to be deployable. It can be closed and the width of the base 51 can be kept narrow, and handling such as transportation can be facilitated.

  In the first and second embodiments described above, an example has been described in which the approach portion 16 and the three-dimensional intersection of two one-way two-way four lanes are built on the existing road 12 having three one-way six-lanes. The present invention can be applied to other lane numbers.

  For example, when constructing a three-way crossing of two lanes on one side and two lanes on an existing road with two lanes on one side and two lanes, an intermediate approach portion and an intermediate bridge or bridge portion of one lane and two lanes on one side By forming and then widening, it is possible to build an approach part or a three-dimensional intersection of two round trip four lanes on one side.

  If the road is wide even if it is an existing road with one round trip two lanes on one side or no lane, leave the width where the vehicle can pass on both sides in the middle of the existing road. An approach part and a three-dimensional intersection can be constructed by forming a part and an intermediate bridge part or a bridge part and then widening.

  Furthermore, in the case of an existing road having four or more lanes, the present invention can be applied by appropriately setting an intermediate approach portion and an intermediate bridge portion according to the number of approach portions and the number of lanes of a three-dimensional intersection.

  In the second embodiment, as the base portion 51 of the bridge portion 50, the intermediate portion 51a and the unfolded portion 51b are connected by the pivotal support portion 51c provided at the lower portion of the intermediate portion 51a. As shown in FIG. 10, a pivot part 51e may be provided on the upper part of the intermediate part 51a, and the deployment part 51b may be developed by the pivot part 51e. Furthermore, it is possible to use a base having a structure without a deployable part.

  Furthermore, in the second embodiment, the example in which the bridge portion 50 is formed with the width of the three-dimensional intersection 10 at a time has been described. However, an intermediate bridge portion having a width corresponding to the intermediate approach portion 34 is formed, and the intermediate bridge portion and the intermediate bridge portion It is also possible to form the bridge portion 50 by widening the width of the intermediate bridge portion after opening two round-trip lanes on one side using the approach portion 34.

It is a side view of the three-dimensional intersection built by Embodiment 1 of this invention. It is a side view which shows a part of approach approach part of the solid intersection of Embodiment 1 of this invention in a cross section. It is a top view which shows a part of approach part of Embodiment 1 of this invention in a cross section. It is sectional drawing of the approach part of Embodiment 1 of this invention. It is a perspective view of the binding metal fitting which connects the block material of Embodiment 1 of this invention. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the existing road. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the state in which the primary enforcement yard was formed. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the state in which the intermediate | middle approach part was formed. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the state in which the secondary enforcement yard was formed. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the state by which the retaining wall was arrange | positioned. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the state in which the wide part was formed. It is a figure explaining the construction process of the approach part of Embodiment 1 of this invention, and has shown the constructed approach part. It is a figure which shows the mounting state of the retaining wall and retaining wall support member of Embodiment 1 of this invention. It is a top view of the three-dimensional intersection built in Embodiment 2 of this invention. (A) is a front view which shows the base of the bridge part of Embodiment 2 of this invention, (b) is an enlarged view of a base. It is a front view which shows the modification of the base part of the bridge part of Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Level crossing 12, 14 Existing road 16 Approach part 16a Road surface 18, 50 Bridge part 20 Block material 22 Tightening bracket 24 Block laminated body 25 Retaining wall 26 Concrete layer 32 Primary execution yard 34 Intermediate approach part 34a Upper surface 36 Retaining wall support member 44 Secondary execution yard 46 Widening part 51 Base

Claims (8)

A method of constructing an approach section for a three-dimensional intersection in the center of an existing road where vehicles can pass side by side in the width direction,
Without arranging retaining walls that form both side surfaces of the existing road in the width direction, a large number of preformed block members are arranged and stacked, and the block members adjacent in the horizontal and vertical directions are connected to each other. By forming a block laminate by pavement on the upper side of the block laminate, the vehicle is narrower than the approach portion and has a width on which the vehicle can pass, and in the width direction of the existing road. Form the intermediate approach part leaving the existing road with a width that allows the vehicle to pass on both sides,
Wherein during the formation of the intermediate approach portion, the said portion adjacent to said intermediate approach of the existing road left on both sides in the width direction of the existing roads in intermediate approach portion, the width of the existing road of the approach portion Positioned on the intermediate approach part side of the side of the direction, the part is in a state in which the vehicle can pass,
Thereafter, the upper part of the intermediate approach part is opened and the part of the existing road is blocked, and the vehicle is allowed to pass through the upper part of the intermediate approach part and the remaining part of the existing road on both sides , by forming a widened part adjacent to both sides in the width direction of the existing road before Symbol intermediate approach in a part above to form the approach portion with a top surface of the wider width than the upper portion of the intermediate approach portion The construction method of the approach part for three-dimensional intersection characterized by this.   The method for building a three-dimensional intersection approach portion according to claim 1, wherein the block material is made of polystyrene foam, and the side surface of the block laminate is covered with a light shielding sheet. 3. The construction of a three-dimensional intersection approach portion according to claim 2, wherein a concrete layer that is continuous in the horizontal direction is formed between the plurality of arranged block members at every predetermined height of the block laminate. Method. After the intermediate approach portion is formed, a pre-formed retaining wall that forms both side surfaces of the approach portion in the width direction of the existing road is installed at a position spaced from the side surface of the intermediate approach portion, and the intermediate approach portion 4. The method for constructing a three-dimensional intersection approach section according to claim 1, wherein the widening section is formed by filling a filling member inside the retaining wall on the side surface of the three-dimensional cross section. The retaining wall supporting member for connecting the retaining wall disposed on both sides of the approach portion, and embedded in said concrete layer so as to penetrate between both sides of the intermediate approach portion to form the intermediate approach portion The construction method of the approach part for three-dimensional intersection of Claim 3 characterized by these. A pair of approach sections are built in the center of an existing road that is located on both sides of the intersection and allows vehicles to run side by side in the width direction, and the pair of approach sections are connected by a bridge section to form a three-dimensional intersection. Is a method of building
The pair of intermediate approach portions are formed with a width narrower than the approach portion and having a width that allows the vehicle to pass on the upper surface and the width that allows the vehicle to pass on both sides, leaving the existing road. Form an intermediate bridge part with a width corresponding to the upper part of the intermediate approach part,
Thereafter, in a state where the vehicle can pass through the upper surface of the intermediate approach portion and the intermediate bridge portion and the existing roads on both sides, by forming a widened portion adjacent to both side surfaces of the intermediate approach portion, Construction of the three-dimensional intersection characterized by constructing the approach portion having an upper surface wider than the upper portion of the intermediate approach portion, and constructing the three-dimensional intersection by expanding the intermediate bridge portion to the width of the approach portion. Method. A pair of approach sections are built in the center of an existing road that is located on both sides of the intersection and allows vehicles to run side by side in the width direction, and the pair of approach sections are connected by a bridge section to form a three-dimensional intersection. Is a method of building
The bridge portion is narrower than the approach portion and has a width on which the vehicle can pass on the upper surface and a width on which the vehicle can pass on both sides, leaving the existing road and forming a pair of intermediate approach portions. Form the
Then, in a state where the vehicle can pass through the upper surface of the intermediate approach portion and the bridge portion and the existing roads on both sides, by forming a widened portion adjacent to both side surfaces of the intermediate approach portion, A method for constructing a three-dimensional intersection characterized by constructing the three-dimensional intersection by constructing the approach portion having an upper surface wider than the upper portion of the intermediate approach portion. The bridge portion has an intermediate portion having a width corresponding to the width of the intermediate approach portion, and a deployment portion that is connected to the intermediate portion by a pivotal support portion and can be deployed in the width direction of the bridge portion. ,
The bridge portion is formed by arranging the intermediate portion so as to connect between the pair of intermediate approach portions, and then expanding the expansion portion to widen the width of the bridge portion. 8. A method for constructing a three-dimensional intersection according to 7.

Images