JP2010229761A - Construction device and construction method for base course reinforced concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction device and a construction method for base course reinforced concrete which can reduce the amount of construction time of the base course reinforced concrete and which can reduce a period of construction. <P>SOLUTION: The construction device 1 of the base course reinforced concrete is used for constructing the base course reinforced concrete 100 in turn in a tunnel in the extension direction of the tunnel every predetermined section which is divided in the extension direction of the tunnel. The construction device 1 of the base course reinforced concrete includes a base truck 2, a concrete pouring pipe 3, and a passage. The base truck 2 is extended between the front end of the planned section for concrete pouring and the rear end of the section which follows in the rear along the side which is in the extension direction of the tunnel of the planned section for concrete pouring where assembly work of a form and reinforcements has completed and along the side which is along the extension direction of the tunnel of the rear section where concrete pouring work is performed after the planned section for concrete pouring. The concrete pouring pipe 3 is provided on the base truck 2, and the passage is provided on the base truck 2 so that it can be extended from the rear end to the front end of the base truck 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a construction apparatus and construction method for roadbed reinforced concrete capable of shortening the construction period.

When constructing subbase reinforced concrete in the tunnel in order along the tunnel extension direction for each predetermined section divided along the tunnel extension direction, move the concrete mixer truck to the concrete placement planned section and cast the concrete It is known to cast concrete in a planned section (see, for example, Patent Document 1). However, there are various problems when driving and moving to the concrete placement planned section in the tunnel. For example, when a vehicle is moved in and out from one tunnel entrance, if the distance from the tunnel entrance to the concrete placement section is long, back operation is required from the concrete placement section to the tunnel entrance, which is a safety issue. It was.
Therefore, there is known a method in which concrete is placed in a concrete placement planned section by using a concrete placement carriage and moving the concrete placement carriage (see, for example, Patent Document 2).

JP 2003-138886 A Japanese Patent Laying-Open No. 2005-90077

However, in order to place concrete in the concrete placement planned section, it is necessary to assemble a reinforcing bar and a formwork in the concrete placement section. In patent document 2, when constructing roadbed reinforced concrete in a certain arbitrary section, a concrete placement schedule section is formed by assembling a reinforcing bar and a formwork in a certain arbitrary section, and then concrete is placed in the concrete placement section. Since the placement is performed, the time for constructing the roadbed reinforced concrete in a certain arbitrary section is the time for assembling the reinforcing bars and the formwork in the certain arbitrary section + the concrete placing time in the certain arbitrary section. In this case, the total time taken from the start of the assembly work of the formwork and rebar for the first section to the end of the concrete placement work for the second section is (rebar and formwork in the first section). Assembly time) + (concrete placement time for the first section) + (rebar and formwork assembly time for the second section) + (concrete placement time for the second section) and Become. In this case, if each work takes 1 day, the total time will take 4 days. As described above, there is a problem that the construction time becomes longer and the construction period becomes longer.
The present invention has been made in view of the above problems, and provides a roadbed reinforced concrete construction apparatus and method that can shorten the construction time of roadbed reinforced concrete and shorten the construction period.

A roadbed reinforced concrete construction device according to the present invention is a roadbed reinforced concrete construction device for constructing roadbed reinforced concrete in a tunnel in order along a tunnel extension direction for each predetermined section divided along a tunnel extension direction. The side along the extension direction of the tunnel in the planned concrete placement section where the assembly work of the frame and rebar is completed, and the side along the extension direction of the tunnel in the section after the concrete placement work is performed after the planned concrete placement section And a base carriage that extends from the rear end of the base carriage to the front end of the base section, and the base carriage that extends from the rear end of the base carriage to the front end. Since the concrete placement pipe and the passage provided on the base carriage so as to extend from the rear end portion to the front end portion of the base carriage, In addition to being able to perform concrete placement work on the concrete placement planned section using a concrete placement pipe, it is possible to pass between the rear end and the front end of the base carriage via a passage, so the formwork in the later section Also, it is planned to cast concrete because it will be possible to transport materials necessary for assembling of reinforcing bars and traffic of workers, and to collect and transport molds removed in the previous section and to transport workers. Perform concrete placement work for the section and formwork and rebar assembly work for the subsequent section at the same time, formwork removal work for the previous section and concrete placement work for the planned concrete placement section and later The formwork and rebar assembly work for the section can be performed in parallel, and the construction period of roadbed reinforced concrete can be shortened.
A roadbed reinforced concrete construction method using the roadbed reinforced concrete construction apparatus of the present invention includes a concrete placement operation for a concrete placement planned section after the assembly work of a formwork and a reinforcing bar, and a concrete placement operation after the concrete placement section. Since the formwork and rebar assembly work for the section after the installation work is performed simultaneously, the construction time of the roadbed reinforced concrete can be shortened, and therefore the construction period of the roadbed reinforced concrete can be shortened.
The formwork removal work for the section before the concrete placement section, the concrete has already solidified after the concrete placement work, the concrete placement work for the concrete placement section, the formwork for the subsequent section, and Since the rebar assembly work is performed in parallel, the construction period of roadbed reinforced concrete can be shortened.
Since the material transportation carriage provided on the base carriage so as to be movable between the rear end portion and the front end portion of the base carriage is provided, the material transportation carriage is attached to the formwork and the reinforcing bar in the later section. By using the material necessary for the assembly work for the work for carrying the material and for collecting and carrying the form removed by the work for removing the form in the previous section, the work for carrying becomes easy.
When the inside of the concrete placement pipe with the rear end connected to the concrete supply source is cleaned, the water supply pipe is provided on the base carriage so as to extend from the rear end to the front end of the base carriage. The end is connected to the water supply source, the tip opening of the concrete placement pipe and the tip end of the water feed pipe are connected to communicate with each other, and the concrete is supplied from the water supply source through the water feed pipe into the concrete placement pipe. Since the water in which the inside of the placing pipe has been washed is sent to the concrete supply source, the inside of the concrete placing pipe can be washed periodically, and the drainage treatment of the water in which the inside of the concrete placing pipe has been washed becomes easy. .
The base carriage is composed of a plurality of unit carriages. The unit carriage has a portal frame having both leg portions and a beam portion connecting the upper ends of the leg portions, and lower ends of both leg portions of the portal frame. The base carriage is formed by connecting the beam portions of each unit carriage provided at a predetermined interval with a connecting member, so that it corresponds to the length of the section. A base carriage can be formed, and the length of the section can be set freely.

The figure which shows the procedure of the construction method of a roadbed reinforced concrete. Sectional drawing of the tunnel where roadbed reinforced concrete was constructed. The top view of the construction equipment of a roadbed reinforced concrete. Sectional drawing of the construction equipment of a roadbed reinforced concrete. The exploded perspective view of the construction equipment of a roadbed reinforced concrete. The figure which shows the procedure of the washing | cleaning method of a concrete placement pipe.

In this embodiment, as shown in FIGS. 2 and 3, when the roadbed reinforced concrete 100 is constructed in the tunnel 200 in order along the tunnel extension direction X for each predetermined section divided along the tunnel extension direction X, 1 is used. The construction device 1 for roadbed reinforced concrete according to this embodiment is used, for example, when building roadbed reinforced concrete for a railway tunnel.
For example, as shown in FIG. 2, invert concrete 205 is formed in the lower part of the cross section of the tunnel 200, and replacement concrete 204 is provided on the invert concrete 205. At the center of the upper surface of the replacement concrete 204, a central water channel 81 formed so as to extend along the tunnel extension direction X and a central groove 82 that is wider than the central water channel 81 and provided at the upper part of the central water channel are provided. The central groove 82 includes a side bottom channel 85 extending from the side edge 84 of the upper opening 83 of the central water channel 81 and a side wall 86 rising from the side bottom channel 85. The upper opening 83 of the central water channel 81 is closed with a water channel cover 87. The construction apparatus 1 is installed on the side bottom path 85 of the central groove 82 so as to be movable along the tunnel extension direction X. The roadbed reinforced concrete 100 is applied to both sides of the upper opening 88 of the central groove 82, that is, between the upper opening edge 89 of the central groove 82 and the tunnel wall 201.

That is, as shown in FIG. 3, the construction apparatus 1 is along the side along the extension direction of the tunnel of the concrete placement scheduled section 91 and the side of the formwork and the reinforcing bar assembly scheduled section 92 along the extension direction of the tunnel. Thus, the length is formed to extend over the leading end portion 91a of the concrete placement planned section 91 and the rear end section 92a of the formwork and reinforcing bar assembly scheduled section 92.
As shown in FIGS. 3 to 5, the construction apparatus 1 includes a base carriage 2, a concrete placing pipe 3, a passage 4, a water feeding pipe 5, a material carrying carriage 6, and a material / material carrying carriage running rail 7. .

  The base carriage 2 is formed by connecting a plurality of unit carriages 21 with connecting members 22. As shown in FIG. 3, the base carriage 2 is formed to have a length extending along the side of the concrete placing scheduled section 91 and the side of the formwork and the reinforcing bar assembly scheduled section 92, and the side bottom path of the central groove 82. 85 is installed. That is, it is formed to have a length that is equal to or greater than the total section length obtained by adding the concrete placement scheduled section 91 and the formwork and reinforcing bar assembly scheduled section 92.

As shown in FIG. 5, the unit carriage 21 is formed by a portal frame 23 and traveling wheels 25 provided at lower ends of both leg portions 24 of the portal frame 23.
The portal frame 23 includes both leg portions 24; 24 and a beam portion 26 that connects the upper ends of the leg portions 24; 24 to each other. In the base carriage 2, the beam portions 26 of the plurality of unit carriages 21 are positioned in parallel with each other at a predetermined interval, and the adjacent beam portions 26 and the beam portions 26 that are positioned in parallel with each other are connected by the connecting member 22. It is formed.

  The traveling wheels 25 are attached to the lower ends of both ends of a wheel attachment body 27 provided at the lower end of the leg portion 24 so as to extend in a direction orthogonal to the beam portion 26 (tunnel extension direction X). That is, the unit carriage 21 includes four traveling wheels 25 and two sidewall wheels 31. That is, two traveling wheels 25; 25 that roll in the tunnel extension direction X are provided along the tunnel extension direction X at a predetermined interval. As described above, since the traveling wheels 25 are provided at the lower ends of both ends of the wheel attachment body 27 extending in the tunnel extending direction X, the unit carriage 21 becomes self-supporting, and the base carriage 2 is assembled by connecting the unit carriages 21 to each other. Becomes easy. Further, since the unit carriage 21 includes the four traveling wheels 25, the rolling friction per traveling wheel is reduced. The two side wall wheels 31 are installed on the side surfaces of both legs 24; 24 so as to slide in contact with both side walls 86. Since this side wall side wheel 31 is provided, the construction apparatus 1 can be made to go straight from the mine inner side to the pit side accurately.

  The connecting member 22 is made of, for example, a rod-shaped steel material called an angle having an L-shaped cross section. For example, the central portions of the beam portions 26 of the adjacent unit carts 21 are connected by a first bar-shaped steel material 22a, and one end portions of the beam portions 26 of the adjacent unit carts 21 are connected by a second bar-shaped steel material 22b. The other ends of the beam portions 26 of the adjacent unit carriages 21 are connected by a third bar-shaped steel material 22c. Accordingly, the base carriage 2 having a predetermined length is formed by sequentially connecting the plurality of unit carriages 21 by the first to third rod-shaped steel members 22a to 22c.

  The concrete placing pipe 3 is provided between the one end of the beam portion 26 on the base carriage 2 and the second rod-shaped steel material 22b (or between the other end of the beam portion 26 and the third rod-shaped steel material 22c). 2 is installed so as to be continuous over the entire length of 2 and attached to the beam portion 26 of the base carriage 2.

  The passage 4 is formed by a scaffold plate 4a installed between the first bar-shaped steel material 22a and the second bar-shaped steel material 22b and between the first bar-shaped steel material 22a and the third bar-shaped steel material 22c in the base carriage. It is formed. The passage 4 is formed by installing a plurality of scaffolding plates 4 a so as to continue over the entire length of the base carriage 2.

  The water feed pipe 5 is disposed between the other end of the beam portion 26 on the base carriage 2 and the third rod-shaped steel material 22c (or between one end of the beam portion 26 and the second rod-shaped steel material 22b). And is attached to the beam portion 26 of the base carriage 2.

  The material carrying cart 6 is, for example, a rectangular plate-shaped material table 6a, a leg 6b provided so as to protrude downward from the lower surface of the rectangular four corners of the material table 6a, and a lower end of each leg 6b. And a traveling pulley 6c.

The material carrying bogie travel rail 7 is formed of the first bar-shaped steel material 22a and the second bar-shaped steel material 22b, or is formed of the first bar-shaped steel material 22a and the third bar-shaped steel material 22c.
That is, the distance between the left and right traveling pulleys 6c; 6c of the material transporting carriage 6 and the distance between the first bar-shaped steel material 22a and the second bar-shaped steel material 22b, or the first bar-shaped steel material 22a and the third bar-shaped It is comprised so that the space | interval with the steel material 22c may correspond, and the left and right traveling pulleys 6c; 6c of the material conveying cart 6 are formed to be slidable on the material conveying cart traveling rail 7.

Based on FIG. 1, the construction method of the roadbed reinforced concrete 100 using the construction apparatus 1 is demonstrated.
For example, the length of the concrete placement planned section to be constructed on one day is set to half the length of the construction apparatus 1. For example, when the length of the concrete placement schedule for one day is 60 m, the construction apparatus 1 is 120 m long.

  First, as shown to Fig.1 (a), the both sides of the upper opening 88 of the center groove | channel 82 located laterally in the front end side half of the construction apparatus 1 are made into the 1st area a, and the reinforcement in this 1st area a and Perform assembly work for the formwork. In this case, materials such as reinforcing bars and formwork are transported to the first section a using the material transporting carriage 6, and the worker uses the passage 4 between the material storage area 101 and the first section a. Come and go. If the rebar and formwork assembly work in the first section a is completed, the first section a becomes the concrete placement scheduled section.

  Next, as shown in FIG. 1 (b), a concrete supply pipe 111 of a concrete mixer truck (raw concrete car) 110 as a concrete supply source is connected to a suction port of a concrete pumping pump 113 mounted on a pump truck 112, and concrete is supplied. The discharge port of the pressure pump 113 and the rear end opening of the concrete placing pipe 3 are connected by a connecting pipe 114 so that they can communicate with each other. In addition, the rear end of the base carriage 2 of the construction device 1 and the pump vehicle 112 are connected by a tow rope 115 so that the construction device 1 can be pulled by the pump vehicle 112. Then, by driving the concrete pumping pump 113 and feeding the ready-mixed concrete from the concrete mixer truck 110 to the tip opening 3t of the concrete placing pipe 3, the concrete placing work for the concrete placing scheduled section which is the first section a. And a frame for the second section b, which is a section after the concrete placement work is performed, that is, the second section b located laterally on the rear end half of the construction apparatus 1 And rebar assembly work. That is, the construction apparatus 1 is installed so as to extend over the leading end portion 91a of the concrete placement scheduled section 91 and the rear end portion 92a of the formwork and reinforcing bar assembly scheduled section 92, and the first section a (concrete placing schedule) The concrete placing operation for the section) and the assembly work of the formwork and the reinforcing bar for the second section b (the subsequent section) are performed simultaneously. The concrete placing work for the first section a is performed by pulling the construction device 1 little by little in the direction of arrow f (from the inside of the mine to the side of the wellhead) with the pump car 112, so that the tip opening 3t side of the concrete placing pipe 3 is moved to the first side. It is performed while moving from the front end side a1 to the rear end side a2 of one section a. Further, in order to place concrete while swinging the tip portion of the concrete placement pipe 3 in the left and right first section a regions on both sides of the upper opening 88 of the central groove 82, the tip of the concrete placement pipe 3 is placed. On the side, a flexible tube is used.

  Then, as shown in FIG. 1 (c), the concrete placement work has been finished and the formwork removal work for the first section a (previous section) in which the concrete has solidified and the work of assembling the formwork and the rebar are finished. The concrete placement work for the concrete placement planned section, which is the second section b, and the assembly work of the formwork and the reinforcing bar for the third section c (the subsequent section) in which the concrete placement work is performed after the concrete placement planned section. And simultaneously. The construction apparatus 1 is installed so as to extend over the front end portion 91a of the concrete placement planned section 91 and the rear end portion 92a of the formwork and rebar assembly planned section 92, and the formwork removal work for the first section a, The concrete placing work for the second section b and the assembling work of the formwork and the reinforcing bar for the third section c (later section) are performed in parallel.

  In addition, the concrete placement pipe 3 needs to wash | clean the concrete adhering in the concrete placement pipe 3 regularly, when placing concrete continuously. For example, after placing concrete for one concrete mixer truck, as shown in FIG. 6, a water discharge port of a water storage tank 121 as a water supply source and a suction port of a water pump 122 are connected by a connecting pipe 123. The discharge port of the water pressure feed pump 122 and the rear end opening 5b of the water feed pipe 5 are connected so as to be able to communicate with each other through a connecting pipe 124. Further, the tip opening 3t of the concrete placing pipe 3 and the tip opening of the water feed pipe 5 are connected. 5t is connected so that communication is possible, and then the water pressure pump 122 is driven to supply water into the concrete placing pipe 3 via the water pipe 5, and the concrete pressure pump 113 is driven to rotate in reverse. As a result, the water that has been pumped into the concrete placement pipe 3 and cleaned in the concrete placement pipe 3 is taken into the concrete storage tank of the concrete mixer truck 110. Thereby, the concrete placement pipe 3 can be cleaned and the water used for the cleaning can be transported to the water treatment plant as it is by the concrete mixer truck 110.

According to the construction method of this embodiment, the total time taken from the start of the assembly work of the formwork and the reinforcing bar to the first section to the end of the concrete placing work for the second section is (the first section Reinforcing bar and formwork assembly time) + (Concrete placement time for the first section and rebar and formwork assembly time for the second section) + (Second time Concrete placement time for the section). In this case, if each work time is one day, the total time required from the start of the assembly work of the formwork and the reinforcing bar to the first section to the end of the concrete placing work for the second section is 3 Since it is a day, it is shorter than the four days of the prior art.
That is, according to the present embodiment 1, when constructing the front and rear sections, the concrete placing work for the previous section and the rebar and formwork assembly work for the rear section can be performed in one day, so the construction period is shortened. become able to.
Moreover, since the work for removing the formwork for the first section a, the concrete placing work for the second section b, and the work for assembling the formwork and reinforcing bars for the third section c are performed simultaneously, the construction period is further reduced. become able to. In addition, when these three operations are performed in parallel, if the construction device 1 having a length extending over the first section a, the second section b, and the third section c is used, the form removal work is performed. Can be performed more efficiently.

According to the construction apparatus 1 of the present embodiment, the base carriage 2, the concrete placing pipe 3 provided on the base carriage 2 so as to extend from the rear end portion of the base carriage 2 to the front end portion, and the rear end of the base carriage 2 Since the passage 4 provided on the base carriage 2 is provided so as to extend from the head to the head, the concrete placement work can be performed on the concrete placement planned section using the concrete placement pipe 3, and the base carriage 2 It is possible to pass between the rear end portion and the front end portion via the passage 4. Therefore, it is possible to transport materials necessary for the assembly section of the formwork and rebar and transport of workers, collect and transport the formwork removed by formwork removal work in the formwork removal section, and transport workers. Therefore, the concrete placement work for the concrete placement planned section and the formwork and rebar assembly work for the formwork and rebar assembly planned section are performed simultaneously, and the mold for the formwork removal section (previous section) The frame removal work and the concrete placement work for the concrete placement planned section and the formwork and reinforcement assembly work for the formwork and reinforcement assembly planned section (later section) can be performed simultaneously in parallel. The construction period of roadbed reinforced concrete can be shortened.
In addition, since the material transport cart 6 is provided, the material transport cart 6 is used for the material transport work necessary for assembling the formwork and the rebar and the formwork collected and transported by the formwork removal work. This facilitates the transportation work.
Moreover, since the water delivery pipe 5 provided in the base carriage 2 is provided so as to extend from the rear end portion to the front end portion of the base carriage 2, the inside of the concrete placing pipe 3 can be easily cleaned, and It becomes possible to easily treat the water in which the inside of the concrete placing pipe 3 is washed.
The base carriage 2 includes a plurality of unit carriages 21, and the unit carriage 21 includes a portal frame 23 having both leg portions 24; 24 and beam portions 26 that connect the upper ends of the leg portions 24; 24. The base carriage 2 is formed by running wheels 25 provided at the lower ends of both leg portions 24; 24 of the gate-shaped frame 23, and the base carriage 2 has beam portions 26; 26 of the unit carriages 21 provided at predetermined intervals. Is formed by being connected by the connecting member 22, the base carriage 2 corresponding to the length of the section can be formed, and the length of the section can be freely set.
Since the unit carriage 21 includes four traveling wheels 25, the rolling friction per traveling wheel can be reduced, and the base carriage 2 can be moved smoothly.

As can be seen from the above-described effects, the construction apparatus 1 may be configured by the base carriage 2, the concrete placing pipe 3 and the passage 4, or the base carriage 2, the concrete placing pipe 3 and the passage 4. It is good also as a structure provided with at least 1 of the trolley | bogie 6 for material conveyance and the water pipe 5 in addition to the structure provided with.
In addition, when performing the formwork removal work for the first section a, the concrete placing work for the second section b, and the work of assembling the formwork and rebar for the third section c (later section) in parallel. If the construction apparatus 1 is installed so as to extend over the first section a, the second section b, and the third section c, the mold removal work can be performed more efficiently.

1 construction equipment, 2 base carriage, 3 concrete placing pipe, 4 passage,
5 Water transport pipe, 6 Material transport cart, 7 Material transport cart travel rail, 21 Unit cart,
22 connecting members, 23 portal frame, 24 legs, 25 traveling wheels, 26 beams,
100 Roadbed reinforced concrete.

Claims (6)

  In a roadbed reinforced concrete construction device that constructs roadbed reinforced concrete in the tunnel in order along the tunnel extension direction for each predetermined section divided along the tunnel extension direction, the concrete casting after the formwork and rebar assembly work has been completed. The tip of the concrete placement section along the side along the extension direction of the tunnel of the planned installation section and the side of the section along the extension direction of the tunnel of the section after the concrete placement operation after the concrete placement section. Base trolley extending over the rear end of the base section and the rear section, a concrete placing pipe provided on the base trolley extending from the rear end of the base trolley to the front end, and the rear end of the base trolley A roadbed reinforced concrete construction apparatus comprising a passage provided on a base carriage so as to extend from a portion to a tip portion.   A roadbed reinforced concrete construction method using the roadbed reinforced concrete construction apparatus according to claim 1, wherein the concrete placement work for the concrete placement planned section where the assembly work of the formwork and the reinforcing bar is completed, and the concrete placement schedule A method for constructing roadbed reinforced concrete, wherein the formwork and rebar assembly work for the section after performing the concrete placing work after the section are performed in parallel.   The formwork removal work for the section before the concrete placement section, the concrete has already solidified after the concrete placement work, the concrete placement work for the concrete placement section, the formwork for the subsequent section, and The construction method for roadbed reinforced concrete according to claim 2, wherein the rebar assembling work is performed in parallel.   The construction apparatus for roadbed reinforced concrete according to claim 1, further comprising a material carrying carriage provided on the base carriage so as to be movable between a rear end portion and a front end portion of the base carriage.   When the inside of the concrete placement pipe with the rear end connected to the concrete supply source is cleaned, the water supply pipe is provided on the base carriage so as to extend from the rear end to the front end of the base carriage. The end is connected to the water supply source, the tip opening of the concrete placement pipe and the tip end of the water feed pipe are connected to communicate with each other, and the concrete is supplied from the water supply source through the water feed pipe into the concrete placement pipe. 5. The roadbed reinforced concrete construction apparatus according to claim 1, wherein water in which the inside of the placing pipe is washed is sent to a concrete supply source.   The base carriage is composed of a plurality of unit carriages. The unit carriage has a portal frame having both leg portions and a beam portion connecting the upper ends of the leg portions, and lower ends of both leg portions of the portal frame. The base carriage is formed by connecting beam portions of each unit carriage provided at a predetermined interval with a connecting member. The construction device of the roadbed reinforced concrete according to any one of claims 4 and 5.

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