Concrete seal dismantling and removal method for replacing emergency water mains in expressways or general road tunnels

Abstract

To provide a concrete seal demolition and removal method which is clean, safe, takes a short time, and places little burden on workers. [Solution] A method for dismantling and removing a concrete seal above an emergency water main pipe in order to replace the emergency water main pipe in a highway or general road tunnel, the method comprising: a core boring process for drilling multiple core holes, which are holes that will become cores, via a core drilling pitch, which is the distance between multiple adjacent holes, in order to statically crush and dismantle the concrete seal while maintaining its plate shape; a burster setting process for aligning the action direction of the burster head to face the adjacent core holes so that it matches the crushing direction and setting the center of the burster head to be in the center of the thickness of the concrete seal; and a concrete seal cracking process for applying pressure to the burster to crack and crush the concrete seal.

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 devices are provided in expressways or general road tunnels in case of fire accidents. For this purpose, emergency water distribution mains are also installed.

[0003] A guard passage is provided on the side of the tunnel along the length of the tunnel. The part of the guard passage where the guard walks is made of concrete slabs (concrete seals), and the concrete seals are filled with sand, with the emergency water main laid inside. [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 the installed emergency water main deteriorates, water leakage occurs. Therefore, replacement work of the emergency water main is necessary. The concrete seal is broken and replaced, but the work of breaking the concrete seal is done by "breaker chipping". Breaker chipping is a work in which several workers hold breakers and strongly vibrate the concrete seal on the spot to break it into pieces the size of stones. Chipping with a breaker in a tunnel generates dust, so dust control measures are necessary. In addition, concrete stones that are crushed during the work may fly and hit the worker or other workers, causing injury. Furthermore, the intense noise makes it difficult for workers to communicate with each other. The workers holding the breakers experience intense vibrations in both hands, making it hard work. This is done under such harsh working conditions.

[0006] The present invention has been made in consideration of such 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 method for dismantling and removing an upper concrete seal of an emergency water main pipe laid along the extension direction of the expressway or general road tunnel for replacing the emergency water main pipe in the expressway or general road tunnel by static crushing while maintaining the plate shape, A proximal end core boring process is a process of drilling a plurality of core holes, which are holes that become cores, at a proximal end, which is one of both ends in the longitudinal direction, which is the direction in which the concrete seal extends, so that the core holes extend in a transverse direction, which is a direction perpendicular to the longitudinal direction; a proximal end concrete seal fracturing step of inserting a burster head so as to fractur e the spaces betWeen the plurality of core holes provided in the proximal end core boring step, and applying pressure to the burster to fractur e the concrete seal at the proximal end; A distal end core boring process is a process of providing a plurality of core holes, which are holes to be cores, at a distal end, which is the other end of the longitudinal direction of the concrete seal, so as to extend in a transverse direction, which is a direction perpendicular to the longitudinal direction; A distal end concrete seal cracking process in which a burster head is inserted between the plurality of core holes provided in the distal end core boring process to crack the concrete seal at the distal end by applying pressure to the burster; A process for determining the 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; and A middle position boring process for boring a hole at a center position in the short direction at a position that is closer to the other end by the length of the demolished concrete from either the proximal end or the distal end; A burster setting process is a process of inserting a burster head into the bore hole provided in the intermediate position boring process, aligning the action direction of the burster head so as to coincide with the longitudinal direction, and setting the center position of the burster head so as to be the center of the thickness of the concrete seal; a concrete seal separation process in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by a length of the demolished concrete plate; a plate-shaped concrete carrying process for loading the plate-shaped concrete obtained by the concrete seal separating process onto a vehicle to carry it out of the tunnel; A repeated boring process of drilling a hole at a central position in the short direction at a position approaching the other end of the concrete seal remaining in the plate-shaped concrete carrying process by the length of the demolished concrete; A repeating burster setting process in which a burster head is inserted into the bore hole created in the repeating boring process, the action direction of the burster head is aligned to coincide with the short side direction, and the center position of the burster head is set to the center of the thickness of the concrete seal; a repeat concrete seal separation process in which the burster head is applied to the burster inserted in the repeat burster setting process to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate carrying process for carrying the concrete plate obtained by the repeated concrete seal separating process onto a vehicle to carry it 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 will minimize the generation of dust, ensure work safety, reduce the workload of workers, and shorten the construction period.

[0009] The above-mentioned concrete seal dismantling and removal method, In the process of determining the length of the concrete slab to be demolished, the longitudinal length of the concrete slab to be demolished and removed is determined by taking 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. This will prevent the generation of dust inside the tunnel and increase the efficiency of transportation.

[0010] The above-mentioned concrete seal dismantling 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 the 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, a 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 between 1 meter and 2 meters. It is characterized by: This allows the length of the demolished concrete plate to be appropriately set, and the concrete seal can be effectively cracked by burster pressure.

[0012] In the proximal end core boring step, the distal end core boring step, the intermediate position drilling boring step, and the repeated drilling 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 over-drilling, which can cause the burster head to not make good contact with the concrete seal.

[0013] In the plate-shaped concrete carrying-out process, Load and remove from the downstream side of the water flow of the emergency water main. It is characterized by: This makes it easier to pinpoint the location of any water leaks caused by deterioration of the emergency water main. Effect of the Invention

[0014] According to the present invention, it is possible to provide a concrete seal demolition method that can minimize dust generation, ensure work safety, reduce the workload of workers, and shorten the construction period. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 shows the first half of a flowchart of a construction method. [Diagram 2] FIG. 13 shows the second half of the flowchart of the method. [Diagram 3] This is a diagram of the tunnel water distribution system. [Figure 4] Cross-section of the monitor passage (removed), cross-section of the monitor passage (after renewal), and plan view of the monitor passage. [Diagram 5] This is a diagram showing the removal of handrails. [Figure 6] This is a picture of the removed handrails being transported. [Figure 7] This shows 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. [Figure 11] FIG. 13 is a diagram showing the pitch of core holes. [Figure 12] FIG. 1 is a diagram showing machines used for static crushing of concrete seals, such as a hydraulic unit, a hydraulic jack, an air compressor, and a generator. [Figure 13] This is a diagram showing how a burster (hydraulic jack) is installed, pressurized, and removed. [Figure 14] 13 is a diagram showing the removal of crushed plate-shaped concrete seals. FIG. [Figure 15] 13 is a diagram showing how crushed plate-shaped concrete seals are hoisted and removed. [Figure 16] This is a diagram showing the state of the water cut section of the tunnel wall. [Figure 17] This shows how concrete is broken into smaller pieces in an open area outside the tunnel. [Figure 18] Reference diagram for the Burster method Checking the thickness of seal concrete (trial excavation) [Figure 19] Reference diagram for the Burster method. Marking (for core drilling) and edge cutting of seal concrete and hand hole vertical wall. [Figure 20] Reference diagram of the Burster method Core drilling Concrete crushing using the Burster method crusher Loading and removal of crushed concrete debris DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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] <Embodiment 1> FIG. 1 shows the first half of a flowchart of the method. The "pre-operational check of optical cable routes, etc." begins with KY (hazard prediction activity) being carried out by all workers, followed by a check to see if there are any cables rising from the top or bottom of the interior panel, or if any cables are branching off from the rack in the direction of the inspection path. "Preparation before adjacent construction work" involves making preparations for adjacent construction sites as the work site moves forward. Specifically, this involves setting up warning signs (displayed with rubber cones) and preparing the equipment and tools required for adjacent construction work. "Handrail removal" refers to the task of removing the handrail that separates the inspection path from the roadway. After the handrail is removed, a temporary road closure is implemented at the fire hydrant location to prevent people from passing in the longitudinal direction. The "opening and closing of the handhole cover" is a task that is performed to prevent the cable inside the handhole from being damaged by the cover falling. The hand key must not fall out of the handhole keyhole. When opening the cover, the workers confirm in advance where the cover will be moved to. In "core drilling for static crushing", when drilling a core into the thickness of the inspection road concrete (160 mm), drill slowly from a depth of about 140 mm to avoid drilling too deep. After core drilling, a core is taken and its thickness is checked to see if it contains rebar. The 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 characteristic operation of this invention, in which crushing is performed between two adjacent core holes, i.e., between 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, and it is necessary to check that the direction of action of the Burster head (direction of applying pressure) is facing the crushing direction, and set the center of the head so that it is the center of the concrete pressure. Pressurization is performed 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-Wall Core Boring" is a task of drilling core holes while checking the height of water pipes and perforated earthenware pipes in existing Tachi-Walls. 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 task that involves 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 cases where water is leaking from a water distribution pipe and to make it easier to identify the location.

[0018] FIG. 2 shows the latter half of the flowchart of the method. "Pressing sand removal" involves removing the sand that is holding down the installed distribution pipe. A high-powered vacuum truck is used. Before sucking in the sand, 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 directly above the distribution pipe, taking care not to suck in sand directly at the top of the perforated ceramic pipe. The sand is sucked in and removed using a high-powered vacuum truck. Depending on the situation, 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. "Laying the main water distribution pipe" is the work of hanging and laying the water distribution pipe. Piping is carried out with due consideration to avoid contact with the existing perforated ceramic pipe. In particular, the curing condition inside the handhole must be rechecked and the utmost care must be taken when carrying out the piping work. "Laying perforated ceramic pipe" is the work 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 done from the outside, and a minimum of temporary structures are set up inside. When pouring concrete, the inside is covered with plywood or other materials, and care is taken to prevent fresh concrete from entering. Particular care is required when removing the inside formwork, and great care is taken to not affect cables, etc. "Handhole cover installation" is carried out as soon as possible after completing the mortar repair after removing the form. The "backfilling with sand" is done in two stages. In the first backfilling, sand is poured up to the top of the water distribution main pipe, the area under the pipe is filled in thoroughly, and compacted by treading, etc. In the second backfilling, sand is poured up to the top, water is tightened, and the area is compacted with a plate type compactor. Pouring concrete for the inspection road is scheduled to be completed in the morning, as it requires pressing and finishing (as a rule, concrete pouring will not take place if the temperature drops below freezing). Mats and other materials will be used for curing. "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 those hydrants.

[0020] Figure 4 shows a cross-sectional view of the guard passage (removed), a cross-sectional view of the guard passage (after renewal), and a plan view of the guard passage. The observer's passage 1 is installed between the tunnel structure and the tunnel roadway, and the part where the observer walks is made of sealed concrete without rebar, with a thickness of about 100 to 150 mm. Directly below the sealed concrete is an emergency water main, with sand poured on top. The handhole side wall is an exception where no sand has been poured in. The circles drawn at a constant pitch in the lower diagram of Figure 4 are core drilling 2. Static fracturing is performed by inserting the head (burster head) of the burster equipment (equipment that applies pressure) into this core drilling. The burster head has a set fracturing direction, and by applying pressure to the burster equipment in the direction you want to fracture, the seal concrete is fractured. As shown in the lower diagram of Figure 4, the core holes are drilled at a fixed interval (pitch), so that the resulting seal concrete becomes a slab of concrete of similar size after crushing. The slab of concrete can be lifted by a crane and loaded onto a truck for transport.

[0021] Figure 5 shows the removal of the handrail. There are three figures in Figure 5, the top, middle and bottom. The top figure shows that the handrail is installed in a location other than where the fire hydrant is installed. The middle and bottom figures show that the handrail is installed in the guard's passage.

[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 it has been removed. As shown in the lower image of Figure 7, the bolts are left in place so that 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 (jack hole) with a diameter of 100 mm is 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 (spacing) of 1 meter.

[0028] Figure 12 shows the machines used for static crushing of concrete seals, including a hydraulic unit, a hydraulic jack, an air compressor, and a 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] FIG. 13 shows how a burster (hydraulic jack) is installed, pressure is applied, and the concrete slab that was split is removed.

[0030] Fig. 14 is a diagram showing how the crushed plate-shaped concrete seal is removed. The crane is loaded onto a 4-ton truck, and the plate-shaped concrete is loaded onto the 4-ton truck and transported away.

[0031] Figure 15 shows how crushed concrete seal plates are hoisted and removed. Concrete plates of similar size are loaded neatly, so loading efficiency is good and dust generation is minimal.

[0032] Figure 16 shows the tunnel wall cut-off section. The lower figure in 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 there is little problem. The broken concrete becomes industrial waste as concrete rubble.

[0034] <Embodiment 2> 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 sealing concrete (trial excavation). Figure 19 is a reference diagram for the Burster method, showing the marking (for core drilling) of sealing 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 removing crushed concrete debris.

[0035] <Proximal end core boring process and distal end core boring process, followed by proximal end concrete seal cracking process and distal end concrete seal cracking process> As shown in Figures 14 and 15, in the method of the present invention, the rectangular plate-shaped demolished concrete with the same dimensions is 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 regular intervals (1 meter intervals in Figure 20) in the center of the short side of the concrete seal as shown in Figure 20, and a burster head is inserted into the core holes so that the action direction of the burster head (direction in which pressure is applied) coincides 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. By having this space, the demolished concrete to be separated can be made into a neat rectangle. On the other hand, if there is no space, the pressure applied from the burster head has nowhere to escape, and the demolished concrete cannot be separated neatly. Therefore, a process is carried out to cut the sections at both ends (proximal end and distal end) of the continuous concrete seal, which have a width (longitudinal width of the concrete seal) that is approximately the same 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 the edges, a gap is created through which the crushed concrete chunks can move (slide)." A continuous concrete seal is between the vertical walls of the handholes. There are some parts of the emergency water main inside the tunnel where workers can insert their hands and operate them, and these are called handholes. The vertical walls are provided between the handholes and the concrete seals. Therefore, the proximal end concrete seal cracking process and the distal end concrete seal cracking process correspond to "3. Edge cutting between the seal concrete and the vertical wall of the handhole" in Figure 19. This edge cutting is done by drilling multiple core holes extending in the short direction of the concrete seal, inserting a burster head to crack the gap between the core holes, and applying pressure to the burster to break it. Therefore, the pressure direction of the burster here is the short direction of the concrete seal.

[0036] As mentioned above, in this method, A proximal end core boring process is a process of drilling a plurality of core holes, which are holes that become cores, at a proximal end, which is one of both ends in the longitudinal direction, which is the direction in which the concrete seal extends, so that the core holes extend in a transverse direction, which is a direction perpendicular to the longitudinal direction; a proximal end concrete seal fracturing step of inserting a burster head so as to fractur e the spaces betWeen the plurality of core holes provided in the proximal end core boring step, and applying pressure to the burster to fractur e the concrete seal at the proximal end; A distal end core boring process is a process of providing a plurality of core holes, which are holes to be cores, at a distal end, which is the other end of the longitudinal direction of the concrete seal, so as to extend in a transverse direction, which is a direction perpendicular to the longitudinal direction; A distal end concrete seal cracking process in which a burster head is inserted between the plurality of core holes provided in the distal end core boring process to crack the concrete seal at the distal end by applying pressure to the burster; The following will be implemented first.

[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 (trial excavation) to ascertain the thickness of the concrete seal. The text at the bottom of Figure 18, "Thickness 150mm or less, core drilling size 160φ, pitch 2m," 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 2m, 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 shows 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 for separating the demolished concrete slabs will be 110φ. Here, if one test drill is performed 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 of the proximal and distal ends. Once the test excavation has determined the appropriate length of the concrete slab 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 express this in this invention.

[0038] The above process can be expressed up to the point where the first demolished concrete slab is separated, as follows: A process for determining the 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; and A middle position boring process for boring a hole at a center position in the short direction at a position that is closer to the other end by the length of the demolished concrete from either the proximal end or the distal end; A burster setting process is a process of inserting a burster head into the bore hole provided in the intermediate position boring process, aligning the action direction of the burster head so as to coincide with the longitudinal direction, and setting the center position of the burster head so as to be the center of the thickness of the concrete seal; a concrete seal separation process in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by a length of the demolished concrete plate; a plate-shaped concrete carrying process for loading the plate-shaped concrete obtained by the concrete seal separating process onto a vehicle to carry it 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 slab has been completed and it has been loaded onto a 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 of drilling a hole at a central position in the short direction at a position approaching 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 in which a burster head is inserted into the bore hole created in the repeating boring process, the action direction of the burster head is aligned to coincide with the short side direction, and the center position of the burster head is set to the center of the thickness of the concrete seal; a repeat concrete seal separation process in which the burster head is applied to the burster inserted in the repeat burster setting process to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate carrying process for carrying the concrete plate obtained by the repeated concrete seal separating process onto a vehicle to carry it 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 above mentioned concrete seal demolition and removal method, In the process of determining the 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 when determining the longitudinal length of the concrete slab to be demolished and removed. 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 means 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 are naturally determined. This determines the length of the demolished concrete slab.

[0042] In the above mentioned concrete seal demolition and removal method, 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 processing plant, but it is not advisable to use a vehicle with a crane to get to the processing plant. It is preferable to break down the demolished concrete slabs into smaller concrete rubble at an appropriate location, transfer it to a dump truck, and transport it to the processing plant.

[0043] When providing a plurality of core holes in the proximal end core boring step and the distal end core boring step, a 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 between 1 meter and 2 meters. It is characterized by:

[0044] In the proximal end core boring step, the distal end core boring step, the intermediate position drilling boring step, and the repeated drilling 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 process, Load and remove from the downstream side of the water flow of the emergency water main. It is characterized by: This is to make it easier to find the location of any leaks.

[0046] Although the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above-described embodiment. [Explanation of symbols]

[0047] 1 Lifeguard Passage 2. Core Drilling

Claims

1. A concrete slab in an upper guard passage where a guard walks in an upper guard passage where an emergency water main is laid along the direction of extension of the expressway or general road tunnel for the purpose of replacing the emergency water main in the expressway or general road tunnel, the concrete seal between the vertical walls of the handholes is statically crushed while maintaining its plate shape, and is then dismantled and removed, a proximal end core boring process for drilling a plurality of core holes, which are holes that will become cores, at a proximal end that is an edge of a vertical wall of a handhole at one of both ends in a longitudinal direction that is a direction in which the concrete seal extends, so as to extend in a transverse direction that is a direction perpendicular to the longitudinal direction; a proximal end concrete seal fracturing step of inserting a burster head so as to fractur e the spaces betWeen the plurality of core holes provided in the proximal end core boring step, and applying pressure to the burster to fractur e the concrete seal at the proximal end; a distal end core boring process for providing a plurality of core holes, which are holes that will become cores, at a distal end, which is an edge of a vertical wall of a hand hole at the other end of the longitudinal direction, which is the direction in which the concrete seal extends, so as to extend in a transverse direction, which is a direction perpendicular to the longitudinal direction; A distal end concrete seal cracking process in which a burster head is inserted between the plurality of core holes provided in the distal end core boring process to crack the concrete seal at the distal end by applying pressure to the burster; A process for determining the 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; and A middle position boring process for boring a single hole at a center position in the short direction at a position that is closer to the other end by the length of the demolished concrete from either the proximal end or the distal end; A burster setting process is a process of inserting a burster head into the bore hole provided in the intermediate position boring process, aligning the action direction of the burster head so as to coincide with the longitudinal direction, and setting the center position of the burster head so as to be the center of the thickness of the concrete seal; a concrete seal separation process in which the burster head is applied with pressure to the inserted burster to separate the concrete seal from the remaining concrete seal by a length of the demolished concrete plate; a plate-shaped concrete carrying process for loading the plate-shaped concrete obtained by the concrete seal separating process onto a vehicle to carry it out of the tunnel; A repeated boring process in which a single hole is drilled at a central position in the short direction at a position from the end of the concrete seal remaining in the plate-shaped concrete carrying process to the other end by the length of the demolished concrete; A repeating burster setting process is a process of inserting a burster head into the bore hole created in the repeating boring process, aligning the action direction of the burster head so as to coincide with the longitudinal direction, and setting the center position of the burster head so as to be the center of the thickness of the concrete seal; a repeat concrete seal separation process in which the burster head is applied to the burster inserted in the repeat burster setting process to separate the concrete seal from the remaining concrete seal by the length of the demolished concrete plate; a repeated concrete plate carrying process for carrying the concrete plate obtained by the repeated concrete seal separating process onto a vehicle to carry it out of the tunnel; A concrete seal dismantling and removal method comprising the steps of: repeating the repeated drilling boring process, the repeated burster setting process, the repeated concrete seal separation process, and the repeated plate-shaped concrete transport process a required number of times.

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

3. The method for dismantling and removing a concrete seal 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, a 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 between 1 meter and 2 meters.

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 boring step, and the repeated drilling 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 process, Load and remove from the downstream side of the water flow of the emergency water main.

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

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