JP7221544B2 - Construction method of slope structure - Google Patents

Description

The present invention relates to a construction method for a slope structure.

Conventionally, as a method for stabilizing the slope, a method of installing a reinforcing member (rock bolt or ground anchor) at the intersection of the slope after installing a mortar or concrete slope on the slope. is known (see Patent Document 1, for example).

In the above construction method, it is necessary to drill holes in the slope surface using a drilling device in order to embed the reinforcing member in the slope surface to a predetermined depth.

Various drilling devices such as hand-held type, crane type and stationary type are used depending on the drilling depth and site conditions.

By the way, a stationary drilling device is generally used by being installed on a horizontal working floor constructed on a scaffold assembled using a single pipe.

However, the construction work and removal work of the scaffolding are troublesome and require a long construction period. In recent years, the number of carpenters (scaffold workers) has decreased significantly, making it difficult to secure workers.

Japanese Patent Application Laid-Open No. 2001-172981

The present invention has been made in view of the above-mentioned current situation, and is a method for constructing a slope structure that allows drilling work to be performed easily and in a short period of time without using scaffolding even when using a stationary drilling device. intended to provide

The gist of the present invention will be described with reference to the accompanying drawings.

A grid-like slope 4 provided on a slope 1 and including a vertical portion 2 and a horizontal portion 3, and a reinforcement provided at an intersection 5 between the vertical portion 2 and the horizontal portion 3 of the slope 4. A construction method for a slope structure including a member 6,
a law frame forming step of forming the law frame 4 on the slope 1;
a horizontal rail laying step of laying a horizontal rail 7 consisting of a single rail body extending along the horizontal portion 3 for each step of the horizontal portion 3 provided in a plurality of steps at predetermined intervals in the vertical direction;
a drilling step of moving a drilling device 8 on the horizontal rail 7 to sequentially drill the installation holes 10 in the slope 1 through the insertion holes 9 provided at the intersections 5 of the horizontal portion 3;
a reinforcing member disposing step of disposing the reinforcing member 6 in the insertion hole 9 and the disposing hole 10;
a stand-by rail laying step of providing a stand-by rail 19 consisting of a single rail body at a position away from the horizontal rail 7;
a first connecting step of connecting the standby rail 19 and the one horizontal rail 7 having the drilling device 8;
a stage movement preparation step of moving the drilling device 8 from the one horizontal rail 7 to the standby rail 19;
a second connecting step of connecting the standby rail 19 having the drilling device 8 and the other horizontal rail 7;
and a stage moving step of moving the drilling device 8 from the standby rail 19 to the other horizontal rail 7 .

Further, in the method of constructing a slope structure according to claim 1, the horizontal rail removing step removes the horizontal rail 7 of the one stage after the drilling process of the one stage and before the drilling process of the other stage. The present invention relates to a method for constructing a slope structure, characterized by including steps.

Further, in the method for constructing a slope structure according to claim 2, the object to be removed is transported using a carriage 16 that can move on the horizontal rail 7 in the horizontal rail removing step. The present invention relates to a construction method for planar structures.

In addition, in the slope structure construction method according to any one of claims 1 to 3, the other horizontal rail 7 is a horizontal rail 7 one step below the one horizontal rail 7 . It relates to the construction method of the slope structure.

Further, in the slope structure construction method according to any one of claims 1 to 4, in the horizontal rail laying step, the horizontal rail 7 is laid at a position vertically lower than the horizontal portion 3 of the step. This relates to a construction method for a slope structure characterized by:

Further, in the slope structure construction method according to any one of claims 1 to 5, in the step of laying the horizontal rail, the horizontal rail is brought into contact with the upper surface of the horizontal portion 3 one step below the horizontal portion 3 of the corresponding step. A slope structure characterized by including a step of supporting with a first support member 11 and a second support member 12 in contact with the upper surface of the horizontal portion 3 two steps below the horizontal portion 3 of the corresponding step. It relates to the construction method of things.

Further, in the slope structure construction method according to any one of claims 1 to 6, the horizontal rail 7 is provided in a facing area facing the horizontal part 3, and the horizontal part outside the facing area is provided. 3, the waiting rail 19 is provided in a non-opposing area.

Further, in the slope structure construction method according to any one of claims 1 to 7, the drilling device 8 is provided so as to be able to turn on a carriage 16 traveling on the horizontal rail 7. It relates to a method for constructing a slope structure, characterized by:

Since the present invention is configured as described above, even when a stationary drilling device is used, the method for constructing a slope structure can be performed easily and in a short period of time without using scaffolding.

It is a schematic explanatory perspective view of a present Example. It is a process schematic explanatory drawing of a present Example. It is a process schematic explanatory drawing of a present Example. It is a process schematic explanatory drawing of a present Example. It is a process schematic explanatory drawing of a present Example. It is a schematic explanatory drawing of a drilling process. It is a schematic explanatory drawing of a drilling process. It is a schematic explanatory drawing of a reinforcement member arrangement|positioning process. It is a schematic explanatory sectional drawing of a roller body.

A preferred embodiment of the present invention will be briefly described with reference to the drawings showing the operation of the present invention.

When providing the installation hole 10 for arranging the reinforcing member 6 at the crossing portion 5 of the slope frame 4, the drilling device 8 is moved along the horizontal rail 7 so that the horizontal portion 3 intersects with the vertical portion 2. Holes are drilled sequentially at the position of part 5. When the drilling of the horizontal portion 3 is completed, the horizontal rail 7 corresponding to the horizontal portion 3 of the next stage is moved to perform the drilling in the same manner.

That is, without requiring the construction of a large-scale scaffolding, the horizontal rails 7 having a simple structure on which the stationary drilling device 8 can be loaded are laid for each horizontal portion 3 of each stage, and the drilling devices 8 are mounted on the horizontal rails. Only by moving on 7, drilling work can be performed simply and smoothly.

Therefore, according to the present invention, it is possible to easily perform drilling work in a short period of time without using scaffolding, thereby reducing man-hours and improving productivity.

A specific embodiment of the present invention will be described with reference to the drawings.

This embodiment is provided on a slope 1 and includes a lattice-shaped law frame 4 including a vertical portion 2 and a horizontal portion 3, and an intersection portion 5 between the vertical portion 2 and the horizontal portion 3 of the law frame 4. It is a construction method (so-called rock bolt construction method) of a slope structure including rock bolts as reinforcing members 6 (tension members) to be arranged.

In this embodiment, the law frame forming step of forming the law frame 4 on the slope 1, and the horizontal portion 3 provided in a plurality of steps at predetermined intervals in the vertical direction are provided on the horizontal portion 3. A horizontal rail laying step of laying a horizontal rail 7 extending along the slope surface, and a drilling device 8 is moved on the horizontal rail 7 to penetrate the slope surface through the insertion hole 9 provided at each crossing portion 5 of the horizontal portion 3. 1, a reinforcing member arranging step of inserting and arranging the reinforcing member 6 in the insertion hole 9 and the arranging hole 10, and the drilling step are completed. A stage change process of moving the drilling device 8 from the horizontal rail 7 of one stage to the horizontal rail 7 of another stage where the drilling process is not performed, and after the drilling process in the one stage. and a horizontal rail removal step of removing the horizontal rail 7 of the one stage before the drilling step of the other stage.

Schematically, using a lateral rail 7 and a drilling device 8 moving on the lateral rail 7 as illustrated in FIGS. Drilling work is performed sequentially at the intersection 5 of the horizontal part 3 of the method, and the reinforcement member 6 is arranged in the drilled arrangement hole 10, so that the reinforcement member 6 is arranged at the intersection 5 of the slope frame 4. A planar structure is provided on the slope 1.

The horizontal rail 7 is a single rail body (monorail) and is supported by rail supports arranged at predetermined intervals.

The rail support abuts on the upper surface of the lateral part 3 one step below the lateral part 3 of the step along which the lateral rail 7 runs (the step drilled by the drilling device 8 moving on this lateral rail 7). A first support member 11 in contact, a second support member 12 in contact with the upper surface of the horizontal portion 3 two steps below the horizontal portion 3 of the step, the first support member 11 and the second support member 12 and a support column 14 erected at the central portion of the connecting rod 13 and supporting the lateral rail 7 . By supporting the lower portion (lower surface) of the horizontal rail 7 at predetermined intervals with the support columns 14 of each rail support, the horizontal rail 7 can be laid substantially horizontally at a predetermined height.

An existing drilling machine can be used as the drilling device 8 .

In this embodiment, as shown in FIGS. 6 and 7, a drilling portion 20A (rotary percussion drill structure), a support portion 20B for supporting the drilling portion 20A so as to be tiltable and rotatable, and the drilling portion 20A are provided. and an operation portion (not shown) for operating the support portion 20B.

The drilling section 20A is composed of a slide base 22 and a rod holding section 23 which is provided on the upper surface of the slide base 22 so as to be slidable in the front-rear direction and which holds the drilling rod body 21 at the front end thereof.

Also, the excavating rod body 21 held by the rod holding portion 23 is configured to be parallel to the slide base 22 . Further, the rod holding portion 23 has a function of moving the excavating rod body 21 in the front-rear direction while holding it, a function of axially rotating the excavating rod body 21 , and a function of striking the excavating rod body 21 .

Therefore, by sliding the rod holding portion 23 forward with respect to the slide base 22, the excavation rod body 21 can be inserted into the slope 1 in parallel with the slide base 22 for excavation.

The excavation rod body 21 is composed of an outer tube rod and an inner tube rod (not shown) arranged inside the outer tube rod. , and an excavating edge is provided at the distal end of each of the outer tube rod and the inner tube rod.

Support members 24 and 25 (single pipes) are attached near the four corners of the trolley where the drilling device 8 is installed to stabilize the posture during drilling (prevent falling off from the horizontal rail 7). A clamp portion 26 (single tube clamp) is provided for this purpose. During drilling work, short support members 24 are attached to the two clamping portions 26 on the slope side of the carriage 16 to contact the upper surface of the horizontal portion 3 one step below, and the two clamping portions 26 on the opposite side are attached. is fitted with a long support 25 which abuts against the upper surface of the lateral portion 3 two steps below. A holding portion 27 for holding the vertical portion 2 during drilling is connected to the support portion 20B. The holding portion 27 also stabilizes the posture of the drilling device 8 during drilling and prevents it from dropping off from the horizontal rail 7 .

The drilling device 8 is rotatably mounted on a carriage 16 running on the horizontal rails 7 . On the upper surface (loading platform) of the carriage 16 on which the drilling device 8 is mounted, a swivel base 17 capable of rotating 360° in the horizontal direction with respect to the carriage 16 is provided. be done.

Therefore, for example, when moving to the drilling position, the drilling portion 20A of the drilling device 8 is moved along the rail, and at the drilling position, the drilling tip of the drilling portion 20A is aligned with the rail. It can be turned by 90 degrees so as to face the surface side, and it is configured such that the tip of the drilling hole is difficult to come into contact with the slope frame 4 when moving to the drilling position.

Each step performed using the horizontal rail 7 and the drilling device 8 will be specifically described below.

The method frame forming step is performed by a known spraying method. For example, assembling the law frame form etc. at the law frame construction position and arranging reinforcing bars, then inserting holes 9 in the law form form (formation position of the arrangement hole 10, arrangement position of the reinforcing member 6) Other than After spraying mortar (or concrete) on the part, remove the slope formwork. As a result, the slope frame 4 is formed in which the insertion hole 9 penetrating from the front and back to the intersection 5 (where the reinforcing member 6 needs to be arranged) is formed.

After the slope forming process, the horizontal rail laying process is performed. The horizontal rail laying process is a process of laying, for example, an industrial monorail as the horizontal rail 7 .

In the horizontal rail laying step, the horizontal rail 7 is laid vertically below the horizontal portion 3 of the step. That is, considering the height of the drilling device 8 moving along the horizontal rail 7 (height of the support portion 20B), the drilling portion 20A can drill the arrangement hole 10. , the height of the horizontal rail 7 laid on each stage is set.

The horizontal rail laying process is performed by arranging rail supports along the longitudinal direction of the horizontal portion 3 at predetermined intervals, and placing and supporting the horizontal rails 7 on the rail supports. The horizontal rails 7 are appropriately divided into predetermined lengths. In addition, the upper surface of each horizontal part 3 is formed so as to be a substantially horizontal plane, and each support member 11, 12 is stably installed.

As illustrated in FIGS. 2 to 5, the lateral rails 7 are provided at least in opposing regions facing the lateral portion 3 . A standby rail 19 and a connecting portion 15 connecting the standby rail 19 and one of the horizontal rails 7 are provided in a non-opposing region outside the facing region that does not face the horizontal portion 3 . The standby rail 19 and the connecting portion 15 may be provided at any time before the changeover process, but in this embodiment, they are provided at the same time as the horizontal rail laying process.

After laying the horizontal rails 7, a drilling device 8 is provided on the horizontal rails 7 of the stage where drilling work is to be performed.

On the horizontal rail 7, in addition to the carriage 16 provided with the drilling device 8, a tractor 18 with an engine, a luggage carriage/passenger carriage may be provided, and each carriage 16 may be towed by the tractor 18. good. For example, when using a drilling device 8 of about 150 kg, a tractor having a loading capacity of about 500 kg is used.

Specifically, as shown in FIG. 9, the towing vehicle 18 and each truck 16 has a roller support section 35 provided with roller bodies 31 and 32 for sandwiching the horizontal rail 7 from above and below. . On the roller body 31 on the lower side of the rail, convex portions 34 are provided on the outer periphery thereof at predetermined intervals to engage with concave portions 33 provided on the lower surface of the rail at predetermined intervals. is configured to allow movement of In this embodiment, two roller bodies 31 and 32 are provided on each roller support portion 35, and one (backward) roller body 31 of the lower roller bodies 31 is provided with a convex portion 34. It is In the figure, reference numeral 37 is a handrail.

In this embodiment, before the drilling process, a towing vehicle 18 and each carriage 16 are installed on a standby rail 19 installed at the base of the ground (near the lower end of the slope 1). From there, a truck 16 with a tractor 18 and a drilling device 8 is attached to the uppermost horizontal rail 7 via a connecting portion 15 that connects a standby rail 19 and the uppermost horizontal rail 7 on which drilling work is performed first. move up to

In the drilling process, the drilling device 8 on the horizontal rail 7 of the stage where the drilling operation is performed is moved to a position corresponding to the crossing portion 5 (where the necessary arrangement hole 10 is not provided) to be drilled. 7, and forming a disposition hole 10 in the slope 1 of the natural ground through the insertion hole 9 by the drilling device 8, and this process is repeated until there is no intersection 5 to be drilled. .

Specifically, the drilling device 8 arranged at a position corresponding to the intersection 5 to be drilled is operated, and the rod holding portion 23 is slid with respect to the slide base 22, whereby the drilling rod body 21 is moved. It is inserted into the slope 1 through the insertion hole 9 of the intersection 5 and excavated. Specifically, one excavation rod body 21 is axially rotated by the rod holding portion 23 and is slid forward and hit to excavate to a predetermined depth, and then another excavation rod is attached to this one excavation rod body 21. The excavation rod bodies 21 are connected, and the plurality of excavation rod bodies 21 connected by the rod holding part 23 are axially rotated and slid forward and struck to excavate to a predetermined depth, and thereafter excavate the number of rods according to the drilling length. By repeating the same operation while connecting the rod bodies 21, one arrangement hole 10 is formed (see FIG. 7). In the figure, reference numeral 30 is a backing plate.

After forming one disposition hole 10, the drilling device 8 is moved along the horizontal rails 7 in order to form the disposition hole 10 in the next crossing portion 5 to be drilled in the same manner. In this embodiment, drilling is started from the intersection 5 closest to the connecting portion 15, and drilling is performed while moving to the adjacent intersections 5 in order. The drilling device 8 is moved back to the rail 19.

The reinforcing member arranging step is a step of inserting and arranging the reinforcing member 6 through the insertion hole 9 and the arranging hole 10 .

Specifically, as shown in FIG. 8, the reinforcing member 6 (lock bolt) is inserted through the insertion hole 9 and inserted into the installation hole 10, and the grout material 36 is injected into the installation hole 10, A pressure receiving plate 28 larger than the diameter of the insertion hole 9 is attached to the base end of the reinforcing member 6 protruding from the arrangement hole 10, and the pressure receiving plate 28 is fixed with a nut 29 so as to be pressed against the intersection 5. do.

The reinforcing member disposing step may be performed at any time after the disposing hole 10 is formed. In this embodiment, the reinforcing member is arranged in sequence each time the arrangement hole 10 is formed.

After the drilling of all the required holes on the slope 1 of the intersection 5 in a predetermined step is completed, a step change step is performed in which the drilling device 8 is moved from the horizontal rail 7 of the step to the horizontal rail 7 of a different step.

In the changeover process, after the drilling device 8 is moved from one horizontal rail 7 to the standby rail 19 via the connection portion 15, the connection destination of the connection portion 15 is switched to move the drilling device 8 from the standby rail 19 via this connection portion 15. and moving it to another horizontal rail 7.

Specifically, the drilling device 8 after completion of the excavation process at a predetermined stage is moved on the horizontal rail 7 of the current stage, moved to the standby rail 19 via the connecting portion 15, and connected to the connecting portion 15. is connected to the horizontal rail 7 one step below, and the drilling device 8 is arranged on the horizontal rail 7 one step below via the connection portion 15 after the change of the connection destination from the standby rail 19. - 特許庁

In this embodiment, as shown in FIGS. 2 to 5, the connecting portion 15 is configured so that the connecting destination can be changed by appropriately combining the curved rail 38 and the straight rails 39, 40. FIG.

The horizontal rail removal process is a process of removing the horizontal rail 7 of the one stage after the drilling process of the one stage and before the drilling process of the other stage. That is, the drilling process is performed in a state in which the horizontal rail 7 above the stage (the second stage from the top onwards) on which the drilling process is performed is removed. As a result, the horizontal movement of the drilling member 8 along the horizontal rail 7 is less likely to be hindered.

In the horizontal rail removal step, the object to be removed is transported using the cart 16 that moves on the horizontal rail 7 to be removed. That is, after the drilling process is completed, the tractor 18 and the trucks 16 are moved to the standby rail 19 side, and the horizontal rails 7 (and rail supports) already used in the drilling process are sequentially collected on the trucks 16. Thus, the horizontal rails 7 and the like can be efficiently collected.

By repeating the drilling process, reinforcing member arranging process, stage changing process, and horizontal rail removing process for each level, and arranging lock bolts as reinforcing members 6 at all necessary intersections 5, The slope 1 can be provided with a slope frame 4 having lock bolts arranged at the intersections 5 .

For example, as shown in FIGS. 2 to 5, when arranging rock bolts at each intersection 5 from the top to the third stage of the law frame 4 having four horizontal parts 3, the law frame formation step and After the horizontal rail laying process, the drilling process for the intersecting part 5 of the horizontal part 3 of the uppermost stage (first stage) is performed, and the reinforcing member arrangement process is sequentially performed (Fig. 2), drilling holes in the first stage. After the process, a changeover process is performed together with a horizontal rail removal process (Fig. 3), a drilling process is performed to the crossing part 5 of the horizontal part 3 of the second stage, and a reinforcing member arrangement process is sequentially performed (Fig. 4). , After the hole drilling process in the second stage, the changeover process is performed together with the horizontal rail removal process, and similarly, the drilling process and the reinforcement member arrangement process for the intersection part 5 of the horizontal part 3 of the third stage are performed ( FIG. 5), the slope 1 is provided with a slope 4 with lock bolts arranged at the required intersections 5 .

In addition, filling material such as a base material for vegetation can be appropriately provided in the opening of the law frame 4 in which the rock bolts are arranged as described above, so that greening and erosion prevention can be achieved.

Since the present embodiment is performed as described above, when providing the installation holes 10 for installing the reinforcing members 6 at the intersections 5 of the slope frame 4, the drilling device 8 is moved along the horizontal rails 7. , and at the position of intersection 5 of the horizontal portion 3 with the vertical portion 2, drilling can be performed sequentially.

That is, without requiring the construction of a large-scale scaffolding, the horizontal rails 7 having a simple structure on which the stationary drilling device 8 can be loaded are laid for each horizontal portion 3 of each stage, and the drilling devices 8 are mounted on the horizontal rails. By simply moving the drilling device 7, the drilling work can be performed easily and smoothly (the drilling device 8 can be moved quickly).

Therefore, this embodiment enables drilling work to be performed easily and in a short period of time without using a scaffold, and is a method capable of greatly reducing man-hours and materials used to improve productivity. It becomes the construction method of the plane structure.

REFERENCE SIGNS LIST 1 slope 2 vertical part 3 horizontal part 4 slope 5 crossing part 6 reinforcing member 7 horizontal rail 8 drilling device 9 insertion hole
10 Mounting hole
11 First support
12 Second support
16 trolley
19 Waiting rail

Claims (8)

A slope structure including a grid-like slope frame provided on a slope and including vertical and horizontal portions, and reinforcing members disposed at intersections of the vertical and horizontal portions of the slope. A construction method of
a law frame forming step of forming the law frame on the slope;
a horizontal rail laying step of laying a horizontal rail composed of a single rail body extending along the horizontal portion for each of the horizontal portions provided in a plurality of stages at predetermined intervals in the vertical direction;
a drilling step of moving a drilling device on the horizontal rail and sequentially drilling holes in the slope through insertion holes provided at the intersections of the horizontal portions;
a reinforcing member disposing step of disposing the reinforcing member in the insertion hole and the disposing hole;
A stand-by rail laying step of providing a stand-by rail consisting of a single rail body at a position away from the lateral rail;
a first connecting step of connecting the standby rail and the one horizontal rail having the drilling device;
a stage movement preparation step of moving the drilling device from the one horizontal rail to the standby rail;
a second connecting step of connecting the standby rail having the drilling device and the other horizontal rail;
and a step moving step of moving the drilling device from the standby rail to the other horizontal rail . 2. The method for constructing a slope structure according to claim 1, further comprising a horizontal rail removing step of removing the horizontal rail of said one stage after said drilling step of said one stage and before said drilling process of said other stage. A construction method for a slope structure, characterized by: 3. The method of constructing a slope structure according to claim 2, wherein, in said horizontal rail removing step, the object to be removed is transported using a carriage capable of moving on said horizontal rail. Construction method. The slope structure construction method according to any one of claims 1 to 3, wherein the other horizontal rail is a horizontal rail one step below the one horizontal rail. method of construction. 5. The slope structure construction method according to any one of claims 1 to 4, wherein in said horizontal rail laying step, said horizontal rail is laid at a position vertically lower than said horizontal portion of said step. Construction method of slope structure. 6. The slope structure construction method according to any one of claims 1 to 5, wherein said horizontal rail laying step includes a first supporting member that abuts on the upper surface of said horizontal portion one step below said horizontal portion of said step. and a second supporting member that abuts on the upper surface of the horizontal portion two steps below the horizontal portion of the step. 7. The slope structure construction method according to any one of claims 1 to 6, wherein the horizontal rail is provided in a facing area facing the horizontal part, and is outside the facing area and does not face the horizontal part. A construction method for a slope structure, wherein the standby rail is provided in the facing area. The method for constructing a slope structure according to any one of claims 1 to 7, wherein the drilling device is provided so as to be able to turn on a carriage that runs on the horizontal rail. Construction method of slope structure.

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