Concrete seal demolition and removal method for replacing emergency water main pipe in expressway or general road tunnels

Abstract

To provide a concrete seal demolition and removal method that is clean, safe, takes a short time, and places little burden on workers.SOLUTION: An upper concrete seal demolition and removal method for an emergency water main pipe, used to replace the emergency water main pipe in an expressway or general road tunnel, comprises: a core boring step of providing a plurality of core holes serving as cores via a core drilling pitch, which is a distance between adjacent holes, so as to statically crush and dismantle a concrete seal while maintaining its plate shape; a burster setting step of aligning a direction of action of a burster head with a crushing direction by facing adjacent core holes and setting the burster head so that a center thereof is located at a center of thickness of the concrete seal; and a concrete seal cracking step of applying pressure to the burster to crack and crush the concrete seal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for dismantling and removing concrete in order to replace an emergency water main pipe laid in a highway or general road tunnel. [Background technology]

[0002] As shown in Patent Document 1, fire hydrant systems are installed in expressways or general road tunnels in case of an emergency fire accident, and emergency water distribution mains are also installed for this purpose.

[0003] A guard's walkway is provided along the side of the tunnel along its length. The part of the walkway where the guard walks is made of concrete slabs (concrete seals), and underneath the concrete seals is packed sand, within which the emergency water main is laid. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6920854 Summary of the Invention [Problem to be solved by the invention]

[0005] When an installed emergency water main deteriorates, leaks occur. This necessitates replacement work. The concrete seal described above is broken to replace the emergency water main. Breaking the concrete seal is performed using a "breaker chipping" technique. Breaker chipping involves multiple workers using breakers to strongly vibrate the concrete seal on-site, crushing it into rock-sized pieces. Chipping with a breaker inside a tunnel generates dust, so dust control measures are necessary. Furthermore, the concrete stones crushed during the work can fly and hit or injure the worker or other workers. Furthermore, the intense noise hinders communication between workers. The intense vibrations transmitted to both hands of the worker holding the breaker make it hard work. This work is carried out under harsh conditions.

[0006] The present invention has been made in consideration of these problems, and aims to provide a concrete seal demolition method that is safe, hygienic, protects the health of workers, and shortens construction time. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention has the following configuration.

[0008] A construction method for replacing an emergency water distribution main in a highway or general road tunnel by statically crushing and dismantling an upper concrete seal laid along the extension direction of the highway or general road tunnel while maintaining its plate shape, The concrete seal is then placed in a sealed space between the concrete block and the concrete wall. a proximal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes formed in the proximal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the proximal end; A distal end core boring process is performed to drill a plurality of core holes at the distal end, which is the other end of the longitudinal direction of the concrete seal, so that the core holes extend in a transverse direction perpendicular to the longitudinal direction. a distal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes provided in the distal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the distal end; a concrete slab length determination process for determining the longitudinal length of the concrete slab to be demolished and removed by obtaining the thickness of the concrete seal from the proximal end core boring process or the distal end core boring process; an intermediate position boring process for boring a hole at a central position in the short direction at a position that is closer to the other end from either the proximal end or the distal end by the length of the demolished concrete; A burster setting process is performed by inserting a burster head into the borehole created in the intermediate position boring process, aligning the direction of action of the burster head to coincide with the longitudinal direction, and setting the center position of the burster head to the center of the thickness of the concrete seal. a concrete seal separating step in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a plate-shaped concrete carrying-out process in which the plate-shaped concrete obtained by the concrete seal separating process is loaded onto a vehicle to be carried out of the tunnel; a repeated boring process in which a hole is drilled at a central position in the short direction at a position that is closer to the other end of the concrete seal remaining in the plate-shaped concrete carrying-out process by the length of the demolished concrete; A repeating burster setting process is performed by inserting a burster head into the borehole created in the repeating boring process, aligning the direction of action of the burster head to coincide with the short side direction, and setting the center position of the burster head to be the center of the thickness of the concrete seal; a repeated concrete seal separating step in which pressure is applied to the burster head inserted in the repeated burster setting step to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate transport process in which the concrete plate obtained by the repeated concrete seal separation process is loaded onto a vehicle to be transported out of the tunnel; The method is characterized in that the repeated drilling and boring process, the repeated burster setting process, the repeated concrete seal separation process, and the repeated plate-shaped concrete transport process are repeated a required number of times. This minimizes the generation of dust, ensures work safety, reduces the workload of workers, and shortens the construction period.

[0009] The above-mentioned concrete seal demolition and removal method, In the process of determining the length of the concrete plate to be demolished, when determining the longitudinal length of the concrete plate to be demolished and removed, the size of the vehicle to be used to transport the demolished concrete, the load limit weight, and the capacity of the crane are taken into consideration. This prevents the generation of dust inside the tunnel and improves transport efficiency.

[0010] The above-mentioned concrete seal demolition and removal method, A concrete crushing step in which the plate-shaped concrete carried out in the plate-shaped concrete carrying-out step is crushed into stone-like concrete rubble The present invention is characterized by further comprising: This allows concrete to be crushed in the open space outside the tunnel.

[0011] When providing a plurality of core holes in the proximal end core boring step and the distal end core boring step, the thickness of the concrete seal is measured in one core hole; If the thickness of the concrete seal is 160 millimeters or more, the length of the demolished concrete plate shall be 1 meter or less; If the thickness of the concrete seal is 150 millimeters or less, the length of the demolished concrete plate shall be 1 meter or more and 2 meters or less. It is characterized by: This allows the length of the concrete plate to be demolished to be set appropriately, and the concrete seal can be effectively split by burster pressure.

[0012] In the proximal end core boring step, the distal end core boring step, the intermediate position drilling and boring step, If the thickness of the concrete seal is 160 mm or more, drill from a depth of 140 mm while checking the depth. It is characterized by: This prevents the Burster head from making good contact with the concrete seal due to excessive drilling.

[0013] In the plate-shaped concrete carrying-out step, Load and transport from the downstream side of the water flow in the emergency water distribution main. It is characterized by: This makes it easier to identify the location of a water leak caused by deterioration of the emergency water main. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a concrete seal demolition method that minimizes dust generation, ensures work safety, reduces the workload of workers, and shortens the construction period. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram showing the first half of a flowchart of a construction method. [Figure 2] FIG. 10 is a diagram showing the second half of the flowchart of the construction method. [Figure 3] This is a diagram of the tunnel water distribution system. [Figure 4] Cross-section of the guard passage (removed), cross-section of the guard passage (after updating), and plan view of the guard passage. [Figure 5] This is a diagram showing the removal of handrails. [Figure 6] This is a diagram showing the removed handrail being removed. [Figure 7] This is a diagram showing the state after the handrail has been removed. [Figure 8] This is a diagram showing the no-entry measures for the fire hydrant area and emergency telephone area. [Figure 9] FIG. [Figure 10] FIG. 10 shows the state after core drilling is completed. [Figure 11] FIG. 10 is a diagram showing the pitch of core drilling. [Figure 12] FIG. 1 shows machines used for static crushing of concrete seals, such as hydraulic units, hydraulic jacks, air compressors, and generators. [Figure 13] This is a diagram showing how a burster (hydraulic jack) is installed, pressurized, and removed. [Figure 14] 10 is a diagram showing the removal of crushed plate-shaped concrete seals. FIG. [Figure 15] This is a diagram showing how crushed plate-shaped concrete seals are hung up and carried out. [Figure 16] This is a diagram showing the water cut-off section of the tunnel wall. [Figure 17] This is a diagram showing how concrete is broken into small pieces in an open area outside the tunnel. [Figure 18] Reference diagram of the Burster method Checking the thickness of the seal concrete (trial excavation) [Figure 19] Reference diagram of the Burster method: Marking (for core drilling) seal concrete and handhole vertical wall edge cutting [Figure 20] Reference diagram of the Burster method Core drilling Concrete crushing with the Burster method crusher Loading and removal of crushed concrete debris DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 17, and a second embodiment of the present invention will be described with reference to FIGS.

[0017] First Embodiment FIG. 1 shows the first half of the flowchart of the construction method. "Checking optical cable routes before work" begins with all workers conducting KY (hazard prediction activities), and involves checking to see if there are any cables rising from the top or bottom of the interior panels, or if any cables are branching off from the rack in the direction of the inspection route. "Preparation for adjacent construction work" involves making preparations for adjacent construction work as the work area moves forward. Specifically, this involves installing warning signs (displayed with rubber cones) and preparing the equipment and tools required for adjacent construction work. "Handrail removal" is the work of removing the handrails that separate the inspection path from the roadway. After the handrails are removed, temporary road closures are put in place at the fire hydrant locations to prevent people from passing in the longitudinal direction. The "opening and closing of the handhole cover" is a task that must be performed to prevent the cable inside the handhole from being damaged if the cover falls. The hand key must not come out of the handhole keyhole. When opening the cover, the workers must confirm in advance where the cover will be moved. In "core drilling for static crushing," when core drilling through the thickness of the inspection road concrete (160 mm), drill slowly from a depth of about 140 mm to avoid drilling too far. After core drilling, a core is taken, its thickness is checked, and the presence or absence of rebar is confirmed. Core drilling is then carried out. If there are any obstacles, the supervisor is consulted. At this time, if the thickness of the sealing concrete is 150 mm or less, the core drilling pitch can be within 2 meters. If the thickness of the sealing concrete is 160 mm or more, the core drilling pitch must be within 1 meter. This core drilling pitch will determine the length of the slab-shaped concrete that results from crushing the sealing concrete. "Static crushing (Baster method)" is the most distinctive operation of this invention, and involves crushing concrete between two adjacent core holes, i.e., two drilled holes separated by the core hole pitch, to produce a slab of concrete. A head for applying pressure, called a Burster head, is inserted into the core hole. At this time, it is necessary to ensure that the direction of action of the Burster head (the direction in which pressure is applied) is facing the crushing direction, and to set the center of the head so that it is the center of concrete pressure. Pressurization is carried out while checking the displacement and pressure status of the concrete, and pressure is stopped once it has been cracked. The "Handhole Cover (Open)" is opened in accordance with the handhole opening and closing manual, and the cover is temporarily placed in a location that will not affect core drilling. "Protecting and installing nearby construction objects" involves protecting cables and pipes with plywood and blankets, as entry into handholes is prohibited in principle. "Handhole Tachi-kabe Core Boring" is the process of drilling a core while checking the height of the water distribution pipes and perforated earthenware pipes in the existing Tachi-kabe. To prevent drilling deeper than the planned depth, the casing of the boring machine is marked at the specified depth and supervised. "Handhole cover (closing)" is a process of temporarily closing the handhole cover, which is carried out after the removal of the standing wall and sand has been completed. "Inspection road concrete removal" involves loading concrete rubble (slab-shaped concrete) onto a truck from the downstream side of the water flow and transporting it away. The reason for transporting it from the downstream side is to deal with leaks in the water distribution pipes and make it easier to identify the location.

[0018] FIG. 2 shows the second half of the flowchart of the construction method. "Pressing sand removal" is the work of removing the sand that is holding down the installed water distribution pipe. A high-powered vacuum truck is used. Before sucking, the sand is loosened with a shovel or similar tool to check that there are no cables outside the perforated ceramic pipe. Suction is carried out near the top of the water distribution pipe, taking care not to suck in sand directly above the perforated ceramic pipe. The sand is sucked in and removed using a high-powered vacuum truck. Depending on the situation, the sand is loaded and removed by hand. "Handhole wall removal" involves cutting and removing the lid support angle with an electric sander or similar tool. From the outside of the handhole, drill holes in the four corners with an electric pick or similar tool. In this case, plywood is placed on the inside of the handhole to protect it. Crushing and removal is done from the outside of the handhole, taking care not to let any debris get inside. "Main water distribution pipe laying" is the work of hanging and laying the water distribution pipe. Piping is carried out with careful consideration to avoid contact with existing perforated ceramic pipes. In particular, the condition of the curing inside the handholes must be rechecked and the utmost care taken when carrying out the piping work. "Laying perforated ceramic pipe" is the process of securely connecting and laying perforated ceramic pipe. When using Eflex, if it is not stable, fix it with wire etc. In "Handhole Wall Formwork, Concrete Pouring and Removal," formwork work is generally carried out from the outside, with minimal temporary structures installed inside. When pouring concrete, the inside is covered with plywood or other materials to prevent fresh concrete from getting in. Particular care is required when removing the inside formwork, and great care is taken to avoid affecting cables, etc. "Handhole cover installation" involves installing the cover as soon as possible after completing the mortar repairs after removing the frame. The "backfilling with sand" is carried out in two stages. In the first backfilling, sand is poured up to the top of the main water distribution pipe, the area below the pipe is filled in thoroughly, and compacted by treading, etc. In the second backfilling, sand is poured up to the top, water-tightened, and compacted with a plate-type compactor. The "Inspection Road Concrete Pouring" is scheduled to be completed in the morning due to the need for pressure finishing (as a general rule, concrete pouring will not be carried out if the temperature drops below freezing). Curing will be done using mats, etc. "Handrail installation" is carried out after the inspection road concrete has cured. "Cleaning up and leaving" involves cleaning up promptly and leaving the premises after work is completed.

[0019] Figure 3 is a diagram of the tunnel water distribution system. As shown in Figure 3, multiple fire hydrants are installed inside the tunnel, and water distribution pipes are installed to supply water to these hydrants.

[0020] Figure 4 shows a cross-sectional view of the guard passage (removed), a cross-sectional view of the guard passage (after updating), and a plan view of the guard passage. The observer's passage 1 is located between the tunnel body side and the tunnel roadway side, and the area where observers walk is made of seal concrete without rebar, with a thickness of about 100 to 150 mm. Directly below the seal concrete is an emergency water main, with sand poured on top. The side wall of the handhole is an exception where no sand has been poured. The circles drawn at a regular interval in the bottom diagram of Figure 4 are core drilling holes 2. Static fracturing is performed by inserting the head (burster head) of the burster equipment (the equipment that applies pressure) into this core drilling hole. The burster head has a predetermined fracturing direction, and by adjusting the direction to the desired fracturing direction and applying pressure to the burster equipment, the seal concrete is fractured. As shown in the bottom diagram of Figure 4, the core holes are drilled at regular intervals (pitch), so the resulting crushed seal concrete becomes slab-shaped concrete of similar size, which can be lifted by a crane and loaded onto a truck for transport.

[0021] Figure 5 shows the removal of the handrail. Figure 5 has three drawings, top, middle and bottom, and the top drawing shows that the handrail is installed in a location other than where the fire hydrant is installed. The middle and bottom drawings show that the handrail is installed in the guard's walkway.

[0022] Figure 6 shows the removed handrail being transported. The removed handrail is loaded onto a truck and transported away.

[0023] Figure 7 shows the handrail after removal. As shown in the bottom of Figure 7, the bolts are left in place so they can be reused.

[0024] FIG. 8 shows the measures to prohibit entry to the fire hydrant area and the emergency telephone area.

[0025] Figure 9 shows the core drilling. Here, a core drilling hole (jack hole) with a diameter of 100 mm was drilled.

[0026] FIG. 10 shows the state after core drilling is completed.

[0027] Figure 11 shows the pitch of the core holes. Here, the core holes are drilled at a pitch (interval) of 1 meter.

[0028] Figure 12 shows the machinery used for static crushing of concrete seals, including a hydraulic unit, hydraulic jack, air compressor, and generator. The air compressor is loaded on one two-ton truck, and the generator and hydraulic unit are loaded on another two-ton truck.

[0029] Figure 13 shows how a burster (hydraulic jack) is installed, pressure is applied, and the concrete slab that has been split is removed.

[0030] Figure 14 shows the removal of the crushed concrete seal plates. The crane is loaded onto a 4-ton truck, and the concrete plates are then loaded onto the truck and transported away.

[0031] Figure 15 shows how crushed concrete seal plates are hoisted in and removed. Concrete plates of similar size are loaded in an orderly manner, resulting in high loading efficiency and minimal dust generation.

[0032] Figure 16 shows the tunnel wall water cutout. The bottom of Figure 16 shows the tunnel wall after the seal concrete has been removed.

[0033] Figure 17 shows how concrete is broken into small pieces in an open area outside the tunnel. In an open area, even if dust is generated, it is outside the tunnel, so it is less of a problem. The broken concrete becomes industrial waste as concrete rubble.

[0034] Second Embodiment In the second embodiment, the details of the Burster method shown in FIGS. 9 to 15 in the first embodiment will be described in more detail. Figure 18 is a reference diagram for the Burster method, showing confirmation of the thickness of the sealing concrete (trial excavation). Figure 19 is a reference diagram for the Burster method, showing the marking (for core drilling) of the seal concrete and the edge cutting of the handhole vertical wall. Figure 20 is a reference diagram for the Burster method, showing core drilling, crushing concrete using a Burster method crusher, and loading and removal of crushed concrete debris.

[0035] <Proximal end core boring process and distal end core boring process, followed by proximal end concrete seal splitting process and distal end concrete seal splitting process> As shown in Figures 14 and 15, in the method of the present invention, rectangular plates of demolished concrete of the same dimensions are separated from the original concrete seal, and the separated demolished concrete is lifted by a crane and placed on the bed of a vehicle for transport. To separate the demolished concrete from the original concrete seal, core holes are drilled at predetermined intervals (1 meter intervals in Figure 20) in the center of the concrete seal's short side, as shown in Figure 20, and a burster head is inserted into the core holes so that the direction of action (direction of pressure) of the burster head is aligned with the longitudinal direction of the concrete seal. This separates the demolished concrete from the remaining concrete seal. At this time, pressure is applied in the longitudinal direction of the concrete seal, so it is desirable to have space for that pressure to escape. In other words, space for the pressure to escape is space for the demolished concrete and the remaining concrete seal to move slightly. Having this space allows the demolished concrete to be separated into a neat rectangle. Conversely, if there is no space, the pressure applied from the burster head has no way to escape, and the demolished concrete cannot be separated neatly. Therefore, a process is carried out to cut off the sections of the continuous concrete seal at both ends (proximal end and distal end) that are approximately the same width (longitudinal width of the concrete seal) as the diameter of the core hole (proximal end concrete seal splitting process and distal end concrete seal splitting process). This is what is meant by the statement at the bottom of Figure 19 that "by cutting off the edges, a gap is created in which the crushed concrete blocks can move (slide)." A continuous concrete seal is the section between the vertical walls of the handholes. There are parts of the emergency water main inside the tunnel where workers can reach in and operate, called handholes. The vertical wall is located between the handholes and the concrete seal. Therefore, the proximal end concrete seal cracking process and the distal end concrete seal cracking process correspond to "3. Cutting the edge between the seal concrete and the vertical wall of the handhole" in Figure 19. This cut-off involves drilling multiple core holes along the short side of the concrete seal, inserting a burster head to crack the gap between the core holes, and applying pressure to the burster to fracture it. Therefore, the direction of pressure applied by the burster here is the short side of the concrete seal.

[0036] As mentioned above, in this method, The concrete seal is then placed in a sealed space between the concrete block and the concrete wall. a proximal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes formed in the proximal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the proximal end; A distal end core boring process is performed to drill a plurality of core holes at the distal end, which is the other end of the longitudinal direction of the concrete seal, so that the core holes extend in a transverse direction perpendicular to the longitudinal direction. a distal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes provided in the distal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the distal end; First, implement the following.

[0037] <Concrete seal thickness check (test drilling) and marking (for core drilling)> The length of the concrete to be demolished (measured along the length of the concrete seal) is determined based on the work (test excavation) to determine the thickness of the concrete seal. The text at the bottom of Figure 18, "Thickness 150mm or less, Core drilling size 160φ, pitch 2 meters" means that if the test drilling reveals that the thickness of the concrete seal is 150mm or less, the length of the demolished concrete slab will be 2 meters, and the size of the core drilling to separate the demolished concrete slab will be 160φ. "Thickness 160mm or more, core drilling size 110φ, pitch 1 meter" means that if the test drilling reveals that the thickness of the concrete seal is 160mm or more, the length of the demolished concrete slab will be 1 meter, and the size of the core drilling to separate the demolished concrete slab will be 110φ. Here, if only one test hole is drilled at the center of the short side of the concrete seal at each of the proximal and distal ends as shown in Figure 18, it may be easier to mark out the positions of the core holes to separate the demolished concrete slabs as shown in Figure 19. If you want to avoid going back and forth between the proximal and distal ends, you can also drill multiple holes at each end. Once the test excavation has determined the appropriate length of the concrete slabs to be demolished and the size of the core holes to be drilled to separate the slabs, the area is marked out and the process of core drilling, crushing the concrete using a Buster method crusher, loading the crushed concrete debris, and removing it is carried out, as shown in Figure 20. The work of separating the demolished concrete slabs at this stage involves crushing the concrete using a Buster method crusher, but since the work involves separating the demolished concrete slabs in a shape as close to a rectangle as possible, the word "separation" will be used to describe this work in this invention.

[0038] The above process can be expressed as follows up to the first step of separating the concrete slabs. a concrete slab length determination process for determining the longitudinal length of the concrete slab to be demolished and removed by obtaining the thickness of the concrete seal from the proximal end core boring process or the distal end core boring process; an intermediate position boring process for boring a hole at a central position in the short direction at a position that is closer to the other end from either the proximal end or the distal end by the length of the demolished concrete; A burster setting process is performed by inserting a burster head into the borehole created in the intermediate position boring process, aligning the direction of action of the burster head to coincide with the longitudinal direction, and setting the center position of the burster head to the center of the thickness of the concrete seal. a concrete seal separating step in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a plate-shaped concrete carrying-out process in which the plate-shaped concrete obtained by the concrete seal separating process is loaded onto a vehicle to be carried out of the tunnel; The following will be implemented.

[0039] In the method shown in Figure 20, core drilling is performed throughout the entire concrete seal before crushing the concrete using a Buster method crusher, but core drilling for separating the second demolished concrete slab can also be performed after the first separation of the demolished concrete slabs and loading onto the vehicle.

[0040] The process from the separation of the second demolished concrete slab to the separation of the last demolished concrete slab can be expressed as follows. a repeated boring process in which a hole is drilled at a central position in the short direction at a position that is closer to the other end of the concrete seal remaining in the plate-shaped concrete carrying-out process by the length of the demolished concrete; A repeating burster setting process is performed by inserting a burster head into the borehole created in the repeating boring process, aligning the direction of action of the burster head to coincide with the short side direction, and setting the center position of the burster head to be the center of the thickness of the concrete seal; a repeated concrete seal separating step in which pressure is applied to the burster head inserted in the repeated burster setting step to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate transport process in which the concrete plate obtained by the repeated concrete seal separation process is loaded onto a vehicle to be transported out of the tunnel; The repeated drilling and boring process, the repeated burster setting process, the repeated concrete seal separation process, and the repeated plate-shaped concrete transport process are repeated a required number of times.

[0041] In the concrete seal demolition and removal method mentioned above, In the process of determining the length of the concrete slab to be demolished, when determining the longitudinal length of the concrete slab to be demolished and removed, it is desirable to take into consideration the size of the vehicle to be used to transport the demolished concrete, the load limit weight, and the capacity of the crane. Considering the size of automobile tunnels in Japan, if a 4-ton vehicle were to enter the tunnel, it would likely impede the traffic of other vehicles working there. This suggests that a 3.5-ton vehicle would be the limit. The load limit of a 3.5-ton vehicle, the size of the loading platform, and the capacity of the crane naturally determine the length of the demolished concrete slab.

[0042] In the concrete seal demolition and removal method mentioned above, A concrete crushing process in which the plate-shaped concrete carried out of the tunnel in the plate-shaped concrete carrying-out process is crushed into stone-like concrete rubble. It further has: In order to dispose of the industrial waste, it will be transported to a treatment plant, but it is not advisable to use a vehicle with a crane to get there. It is better to break down the demolished concrete slabs at an appropriate location into smaller concrete rubble, load them onto a dump truck, and transport them to the treatment plant.

[0043] When providing a plurality of core holes in the proximal end core boring step and the distal end core boring step, the thickness of the concrete seal is measured in one core hole; If the thickness of the concrete seal is 160 millimeters or more, the length of the demolished concrete plate shall be 1 meter or less; If the thickness of the concrete seal is 150 millimeters or less, the length of the demolished concrete plate shall be 1 meter or more and 2 meters or less. It is characterized by:

[0044] In the proximal end core boring step, the distal end core boring step, the intermediate position drilling and boring step, If the thickness of the concrete seal is 160 mm or more, drill from a depth of 140 mm while checking the depth. It is characterized by: The hole must be suitable for inserting the burster head, because if it is too large, the burster head may not make good contact and pressure may not be transmitted properly.

[0045] In the plate-shaped concrete carrying-out step, Load and transport from the downstream side of the water flow in the emergency water distribution main. It is characterized by: This is to make it easier to find the location of any leaks.

[0046] Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above-described embodiments. [Explanation of symbols]

[0047] 1 Lifeguard Passage 2. Core drilling

Claims

1. A construction method for replacing an emergency water distribution main in a highway or general road tunnel by statically crushing and dismantling an upper concrete seal laid along the extension direction of the highway or general road tunnel while maintaining its plate shape, The concrete seal is then placed in a sealed space between the concrete block and the concrete wall. a proximal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes formed in the proximal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the proximal end; A distal end core boring process is performed to drill a plurality of core holes at the distal end, which is the other end of the longitudinal direction of the concrete seal, so that the core holes extend in a transverse direction perpendicular to the longitudinal direction. a distal end concrete seal cracking step in which a burster head is inserted between the plurality of core holes provided in the distal end core boring step to crack the spaces between the core holes, and pressure is applied to the burster to crush the concrete seal at the distal end; a concrete slab length determination process for determining the longitudinal length of the concrete slab to be demolished and removed by obtaining the thickness of the concrete seal from the proximal end core boring process or the distal end core boring process; an intermediate position boring process for boring a hole at a central position in the short direction at a position that is closer to the other end from either the proximal end or the distal end by the length of the demolished concrete; A burster setting process is performed by inserting a burster head into the borehole created in the intermediate position boring process, aligning the direction of action of the burster head to coincide with the longitudinal direction, and setting the center position of the burster head to the center of the thickness of the concrete seal. a concrete seal separating step in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a plate-shaped concrete carrying-out process in which the plate-shaped concrete obtained by the concrete seal separating process is loaded onto a vehicle to be carried out of the tunnel; a repeated boring process in which a hole is drilled at a central position in the short direction at a position that is closer to the other end of the concrete seal remaining in the plate-shaped concrete carrying-out process by the length of the demolished concrete; A repeating burster setting process is performed by inserting a burster head into the borehole created in the repeating boring process, aligning the direction of action of the burster head to coincide with the short side direction, and setting the center position of the burster head to be the center of the thickness of the concrete seal; a repeated concrete seal separating step in which pressure is applied to the burster head inserted in the repeated burster setting step to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate transport process in which the concrete plate obtained by the repeated concrete seal separation process is loaded onto a vehicle to be transported out of the tunnel; A concrete seal dismantling and removal method characterized in that the repeated drilling and boring process, the repeated burster setting process, the repeated concrete seal separation process, and the repeated plate-shaped concrete transport process are repeated the required number of times.

2. The concrete seal dismantling and removal method according to claim 1, In the process of determining the length of the concrete plate to be demolished and removed, the method for demolition and removal of concrete seals is characterized in that when determining the longitudinal length of the concrete plate to be demolished and removed, the size of the vehicle to be used to transport the demolished concrete, the load limit weight, and the capacity of the crane are taken into consideration.

3. The concrete seal dismantling and removal method according to claim 1, A concrete crushing step in which the plate-shaped concrete carried out in the plate-shaped concrete carrying-out step is crushed into stone-like concrete rubble A concrete seal dismantling and removal method further comprising:

4. When providing a plurality of core holes in the proximal end core boring step and the distal end core boring step, the thickness of the concrete seal is measured in one core hole; If the thickness of the concrete seal is 160 millimeters or more, the length of the demolished concrete plate shall be 1 meter or less; If the thickness of the concrete seal is 150 mm or less, the length of the demolished concrete plate shall be 1 meter or more and 2 meters or less.

2. The method for dismantling and removing a concrete seal according to claim 1.

5. In the proximal end core boring step, the distal end core boring step, the intermediate position drilling and boring step, If the thickness of the concrete seal is 160 mm or more, drill from a depth of 140 mm while checking the depth.

2. The method for dismantling and removing a concrete seal according to claim 1.

6. In the plate-shaped concrete carrying-out step, Load and transport from the downstream side of the water flow in the emergency water distribution main.

2. The method for dismantling and removing concrete seals according to claim 1.

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