JP2553987B2 - Deep foundation foundation excavation construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep foundation foundation excavation construction method for efficiently constructing a deep foundation foundation vertical hole when constructing a highway bridge support pole in a mountainous area or the like, and particularly to a plurality of vertical holes. The present invention relates to a deep foundation foundation excavation construction method that enables simultaneous excavation and completion.

[0002]

2. Description of the Related Art Conventionally, excavation work for pits for deep foundations has been developed as a construction method by human labor, but it is often a laborious work due to human labor such as breaker noise in the hole and discharge of mined earth and sand. However, it is difficult to secure a labor force because there are many accidents of falling and crashing when working in deep holes, which is dangerous work. Moreover, since the accident rate is high in the excavation work of the deep foundation foundation pit, the development of a construction machine is desired. Therefore, as an alternative to human-powered construction, the use of construction machines for general construction is being considered, and the development of a dedicated machine with a smaller general-purpose excavator is also being attempted.

As a basic excavation method of this kind, a gate type crane is installed on a foundation constructed on a flat surface disclosed in Japanese Patent Publication No. 59-45071, and an excavator is assembled in the gate type crane to construct a gate type. With the guide pipe supported on the crane, lower the excavator to excavate the earth and sand, and as the excavation progresses, install a liner plate on the upper end of the skin plate that is in contact with the inner surface of the excavation hole. A basic excavation method for a steel tower or the like is known in which the excavator is pulled up after being replenished to form an excavation hole having a predetermined diameter and a predetermined depth.

In this basic excavation method, a portal crane is installed on a foundation constructed on a flat ground, an excavator is assembled in the portal crane, and the excavator is supported by a guide pipe with respect to the portal crane. The excavator is lowered in this state to excavate the earth and sand, and as the excavation progresses, a liner plate is added to the upper end of the skin plate provided around the excavator so as to contact the inner surface of the excavation hole. The method of pulling up the excavator after the formation of the excavation hole is as follows. Therefore, according to the basic excavation method described above, the excavator can be surely lowered using the guide pipe, and the collapse of the inner surface of the excavation hole is caused by the skin. The plate and the liner plate can surely prevent the excavation work, and the excavation work can be performed efficiently and easily.

[0005]

However, the deep foundation is generally as small as 2 m to 5 m in diameter, and the maximum depth is 30 m.
Since the pit has a special condition of m, it is difficult to efficiently perform excavation work by remodeling or converting a general construction machine. Moreover, excavation capacity is insufficient even if the general construction machine is downsized, and there is a problem in work efficiency. In addition, since deep foundations cover a wide range from soil soft soil to hard rock, it is almost impossible to excavate each soil with a single machine, and there is a problem in working efficiency.

In the method of excavating a steel tower or the like disclosed in Japanese Patent Publication No. 59-45071, a liner plate 22 is assembled by a human in the borehole 26 in order to prevent the wall surface of the borehole from collapsing. Iki, pit-shaped excavation hole 26
When the excavation work is completed, the guide pipe 19, the guide pipe fixing device 20, the guide pipe lifting / lowering device 21, the excavation scraping bucket 12, the breaker 18, the drifter 23, etc. are put into the excavation hole 26, disassembled, and then lifted up. Therefore, the work in these boreholes has a serious drawback that the work is dangerous, with many accidents such as falling and falling.

The present invention has been made in view of the above circumstances, and utilizes a deep foundation foundation construction machine in which a suspension frame is mounted on a self-propelled frame that can freely travel on the ground, and is used in a deep hole for a deep foundation foundation. It is an object of the present invention to provide a deep foundation foundation excavation construction method that enables safe excavation work in the ground, and can efficiently complete the excavation work performed by a plurality of deep foundation foundation vertical holes at the same time.

[0008]

In order to achieve the above-mentioned object, the present invention provides a deep foundation construction machine equipped with a hanging frame on a self-propelled frame which can freely travel on the ground. In the foundation foundation excavation construction method, after suspending the composite construction device in the vertical hole where the earth removal work has been completed from the vicinity of the center of the self-propelled frame by the winch arranged on the self-propelled frame of the deep foundation foundation construction machine, Using the excavator equipped in the composite construction device, the convex portion of the vertical hole excavation surface is hit, and then the wall support device equipped in the composite construction device is used to support the excavated wall surface. It is a deep foundation foundation excavation construction method characterized by selecting a rock drilling machine equipped in the combined construction equipment to perform drilling such as blasting holes, and especially for excavation work of a plurality of deep foundation foundations by clam shell etc. Alternate in vertical holes In the excavation work that is carried out, the earth removal work is performed in one vertical hole, the excavation work is simultaneously performed in the other vertical hole using the deep foundation foundation construction machine, and these operations are alternately performed in parallel. In addition, the feature is that soil removal work by one clam shell etc. and excavation work using two or more deep foundation construction machines are performed at the same time, and then these works are sequentially replaced and performed in parallel. I am trying.

Further, when a plurality of deep foundation foundation vertical holes are constructed on a terrain where the ground surface is uneven, excavation work is performed by a clam shell or the like between the excavation surface of the deep foundation basic vertical holes. In the case of excavation work when there is a vertical drop in the ground, a divided block type pedestal is provided above the excavation opening on the ground surface, and the top surface of the pedestal is installed at the same height as the above ground surface. The foundation foundation construction machine moves the excavation holes on the surface of the upper foundation one by one to carry out excavation work, and at the other vertical hole, the soil removal work is carried out in parallel by a clam shell or the like.

[0010]

Next, the operation of the deep foundation foundation excavation construction method according to the present invention will be described. First, a deep foundation foundation construction machine equipped with a suspension frame on a self-propelled frame that can freely travel on the ground is installed on a highway bridge. It is transferred to the vicinity of the deep foundation foundation excavation hole for the purpose of constructing support pillars, and wait for the earth removal work by the clam shell etc. in the deep foundation foundation vertical hole to finish,
The composite construction equipment is hung by the wire from the suspension frame in the vertical hole where the earth removal work is completed from the vicinity of the center of the self-propelled frame by the winch arranged on the above-mentioned self-propelled frame, and the vertical hole is excavated by the excavator equipped in the composite construction equipment. The convex portion of the excavation surface is hit, and then the excavation surface is supported by using the wall support device equipped in the above composite construction device. Furthermore, when it is necessary to drill holes such as blast holes in the deep foundation excavation pit, the rock drilling machine equipped with the combined construction equipment is used to drill holes such as blast holes. In this way, all the work such as the work of hitting the convex portion of the pit excavation surface, the support work of the excavation surface, and the drilling work such as the blast hole can be safely performed in the deep foundation foundation pit.

In the case of excavation work in which a plurality of deep foundation foundation pits are alternately used for soil removal work by a clam shell or the like, one pit is used for earth removal work and the other pits are used for deep foundation work machines. It is possible to carry out excavation work at the same time by using, and to carry out these works alternately and in parallel to complete a plurality of deep foundation pits at the same time. At this time, the earth removal work by the clamshell can be handled by turning the boom without moving the clamshell body. In addition, in the case of excavation work that uses a clam shell or the like to perform earth excavation work in three or more deep foundation foundation vertical holes,
Since excavation work using two or more deep foundation work machines is performed at the same time, and then these operations are sequentially switched and performed in parallel, the clamshell earth removal work time and the work time by the deep foundation work machine are By utilizing the difference, that is, the difference in working time of about 1: 3, the earth discharging work and the excavation work of the deep foundation foundation pit can be simultaneously performed in parallel to complete a plurality of deep foundation foundation pits at the same time.

Further, when a plurality of deep foundation foundation pits are to be constructed on the terrain where the ground surface of the pit is uneven, a divided block type mount is provided on the ground surface of the pit, Installed so that the top surface of the gantry is at the same height as the surface of the upper ground, the deep foundation foundation construction machine is on top, and the excavation holes on the ground surface are sequentially moved to perform the excavation work. With the installed clam shells, etc., the earth removal work can be performed in parallel at the same time, and multiple vertical holes with different levels can be completed at the same time.

[0013]

EXAMPLES Next, examples for carrying out the deep foundation foundation excavation construction method according to the present invention will be described with reference to the drawings.
FIG. 1 is a vertical cross-sectional explanatory view of this embodiment, and FIGS.
4A and 4B are plan views of the present embodiment, respectively, and FIG. 4 shows an embodiment in which a plurality of deep foundation foundation vertical holes are constructed on a terrain in which the excavation mouth surface of the vertical holes is uneven.

As shown in FIG. 1, in the present embodiment, when constructing a prop for a highway bridge in a mountainous area or the like, a plurality of holes are excavated by a shovel or a backhoe at a planned site of a deep foundation foundation pit. Then, the segment 1 is installed, and its periphery is fixed with concrete. The deep foundation foundation construction machine 4 equipped with the suspension frame 3 on the self-propelled frame 2 capable of traveling on the ground by a crawler or the like is transferred to the deep foundation foundation vertical hole P thus formed. Then, the winch 5 arranged on the self-propelled frame 2 suspends the combined construction device 7 by the wire 6 from the suspension frame 3 in the segment 1 of the hole mouth where the earth removing work is completed from the vicinity of the center of the self-propelled frame 2.

In this combined construction device 7, a rotatable swivel frame 9 is mounted under a suspension frame 8 suspended by the wire 6, and an excavator (not shown) has a cutter part at the lower part of the swivel frame 9. Is movably mounted in the hole radial direction and the vertical direction, and a rock drill not shown is mounted in the lateral space of the excavator so that the drilling direction can be changed.
Further, the operation chamber 10 is mounted in the side space thereof, and the wall support device 11 is arranged at the bottom of the operation chamber 10 so as to be vertically swingable and rotatable. Therefore, after fixing the composite construction device 7 to the excavation wall by the gripper 12 of the composite construction device 7, the excavator equipped in the composite construction device 7 is used to operate in the operation room 10 to project the convex portion of the vertical excavation wall surface. When it is necessary to hit the ground, support the excavation surface by using the wall support device 11, or perform drilling such as blast hole, select the rock drill and select the blast hole. Then, the deep foundation foundation vertical hole P is continuously drilled.
In this way, after a certain amount of excavation is completed, the construction machine 4 is moved, and then the self-propelled clamshell 13 which can be moved by a crawler or the like on the ground is moved to the deep foundation foundation vertical hole P, and by the clamshell 13. Perform earth removal work in the excavation hole.

Next, as shown in FIGS. 2 and 3, when two or three deep foundation foundation vertical holes P are to be simultaneously drilled, a self-propelled clamshell 13 capable of traveling is provided on the plurality of deep foundation foundations. It is arranged at a position corresponding to the vertical shaft P by the turning of the boom 15, and the earth removal work by the clam shell 13, the excavation work by the composite construction device 7 suspended from the deep foundation foundation construction machine 4, the excavation surface such as concrete spraying, etc. The support work of can be done in parallel at the same time. Also, since these operations are sequentially replaced and performed in parallel, comparing the clamshell earth removal work time with the support work time such as excavation by the deep foundation foundation construction machine and concrete spraying is about 1: 3. By utilizing the difference in the working time, one earth unloading operation and three deep foundation foundation pit excavation operations can be performed in parallel at the same time, and a large number of deep foundation foundation pits can be completed at the same time.

Further, as shown in FIG. 4, when a plurality of deep foundation foundation pits P are to be constructed on a terrain in which the ground surface of the pit has a stepped surface, the ground surface B is placed above the pit. The divided block type pedestal 14 is provided, and the pedestal 14 is installed so that the upper surface thereof is the same as the height of the upper ground surface A. In this manner, the excavation work is performed by sequentially moving the excavation holes on the upper ground surface A and the ground surface B of the deep foundation foundation construction machine 4. While performing this excavation work, in the other pit P, a clam shell or the like installed on the surface A of the upper ground simultaneously performs the earth unloading work to simultaneously complete a plurality of pits having different steps.

[0018]

As described above, according to the deep foundation foundation excavation construction method according to the present invention, the winch arranged on the self-propelled frame of the deep foundation foundation construction machine removes soil from the vicinity of the center of the self-propelled frame. After suspending the composite construction equipment in the completed vertical hole, use the excavator equipped in the suspended composite construction equipment to strike the convex part of the vertical excavation wall surface, and then to this composite construction equipment. When it is necessary to support the excavated surface using the wall support device equipped, and when it is necessary to drill holes such as blast holes, select the rock drilling machine equipped with the above composite construction device to remove the blast holes. Since the holes are drilled, it is possible to continuously carry out the work of hitting the convex portion of the pit excavated surface after earth removal and the support work of the pit excavated surface, and also when it is necessary to drill holes such as blast holes. Since drilling work can also be done, mountainous areas Efficiency highway bridge for shinso foundation holes, such as well, and can ensure the safety of the work, moreover improve the open and working environment from agonizing work within shinso foundation hole is made.

Further, even when a plurality of deep foundation foundation pits are to be constructed at the same time, the clam shell is used to remove soil in one pit and the deep foundation foundation construction machine is used to excavate in other pits. Since the work is performed at the same time and these works are performed alternately in parallel, the difference between the clamshell earth removal work time and the work time of the deep foundation work machine is used to perform the earth removal work and multiple deep foundation works. It is possible to complete multiple deep foundation foundation pits at the same time while efficiently excavating the foundation pits and ensuring work safety. Further, even when a plurality of deep foundation foundation pits are constructed on a terrain where the ground surface of the pit is uneven, there is an effect that a plurality of pits can be completed at the same time as in the case of flat ground.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view of the present embodiment.

FIG. 2 is a plan view for explaining the operation of this embodiment.

FIG. 3 is a plan view illustrating the operation of another embodiment.

FIG. 4 is a vertical cross-sectional explanatory view of another embodiment.

[Explanation of symbols]

 1 Segment 2 Self-propelled frame 3 Suspended frame 4 Deep foundation foundation construction machine 5 Winch 6 Wire 7 Combined construction equipment 8 Suspension stand 9 Swivel frame 10 Control room 11 Wall support device 12 Gripper 13 Clamshell 14 Stand 15 Boom P Deep foundation foundation Vertical hole A Top surface B Base surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Ito 518 Komagaki, Nagareyama City, Chiba Prefecture Mitsui Construction Co., Ltd. Technical Research Institute (72) Inventor Yutaka Miura 2-1-1 Nihombashi Muromachi, Chuo-ku, Tokyo Mitsui Miike Works (72) Inventor Satoshi Hamada 2-28 Asahi-cho, Omuta-shi, Fukuoka Mitsui Miike Works Miike Works (72) Inventor Masahiro Nonaka Nihombashi-Muromachi 2-chome, Chuo-ku, Tokyo Mitsui Miike Manufacturing Co., Ltd. (72) Inventor Mitsuhiro Mioda 2-28 Asahi-cho, Omuta-shi, Fukuoka Mitsui Miike Manufacturing Co., Ltd. Miike Works

Claims (4)

(57) [Claims] 1. In a deep foundation digging construction method performed by using a deep foundation foundation construction machine equipped with a suspension frame on a self-propelled frame that can freely travel on the ground, the self-propelled construction of the deep foundation foundation construction machine. After suspending the combined construction device from the vicinity of the center of the self-propelled frame by the winch arranged on the frame into the vertical hole, the vertical excavation using the excavator equipped in the combined construction device. The convex portion of the surface is hit, and then the excavation wall surface is supported by using the wall support device equipped in the composite construction device, and the rock drilling machine installed in the composite construction device is selected to blast holes. A deep foundation foundation excavation construction method characterized by making holes such as. 2. In excavation work in which two deep foundation foundation vertical holes are alternately used for excavating work using a clamshell or the like, one vertical hole is used for excavating work using a clamshell or the like.
2. The method for excavating a deep foundation work according to claim 1, wherein excavation work using a deep foundation work machine is simultaneously performed in other vertical holes, and then these operations are alternately and concurrently performed. 3. In the excavation work in which the earth removal work is performed by three or more deep foundation foundation pits using a clam shell or the like,
Claims characterized in that soil removal work by one clam shell or the like and excavation work using two or more deep foundation construction machines are carried out at the same time, and then these works are sequentially replaced and carried out in parallel. Deep foundation foundation excavation construction method described in 1. 4. When excavating a plurality of deep foundation foundation pits on a terrain where the ground surface is uneven, excavation work is carried out by a clam shell or the like between the excavation face surfaces of the deep foundation foundation pits. In the case of excavation work when there is a vertical drop in the ground, a divided block type pedestal is provided above the excavation opening on the ground surface, and the top surface of the pedestal is installed at the same height as the above ground surface. 2. The foundation foundation construction machine moves excavation holes on the surface of the upper base one by one to carry out excavation work, and in the other vertical hole, excavation work is carried out simultaneously in parallel with a clam shell or the like. Deep foundation foundation excavation construction method.