JP2022036313A - Messer shield device and open pit method using the same - Google Patents

Abstract

To provide a messer shield device that can prevent increase in a duration of construction for burying an underground structure due to traveling of the messer shield device in a different direction from a plan and ensure safety of the construction for burying the underground structure without causing a front messer to break a water pipe and the like, and an open pit method using the same.SOLUTION: When a front messer 40 is moved forward while penetrating a natural ground, a pressing force to press the front messer forward is measured by a hydraulic sensor. When the pressing force measured by the hydraulic sensor is equal to or greater than a predetermined pressing force, driving of the front messer to move forward is stopped. Accordingly, even if there is a large rock in a forward direction of the front messer, displacement in a travel direction of a messer shield device 1 due to collision to the large rock and the like can be prevented.SELECTED DRAWING: Figure 5

Description

The present invention relates to a Messel shield device in which an intermediate jack is connected between a front frame and a tail frame to bury an underground buried structure such as a box culvert, and an open pit construction method using the same.

Conventionally, there has been known a Messel shield device in which an intermediate jack is connected between a front frame and a tail frame to bury an underground structure such as a box culvert. As this type of Messel shield device 100, a rigid front frame 111 and a tail frame 112 in which a plurality of cutting beams are arranged between a frame body made of a plurality of vertical members and horizontal members are provided (FIG. 10). , See FIG. 11). A plurality of front messels 113 and tail messels 114 are slidably arranged on both sides of the front frame 111 and the tail frame 112, and a press-fit jack 115 is arranged between the front frame 111 and each front messel 112. .. Then, when the press-fit jack 118 is extended, the front messel 113 and the tail messel 114 penetrate into the ground in the excavation direction, and all the press-fit jacks 118 are contracted to dig the front frame 111 in the excavation direction. Will be done. Then, the tail frame 112 is pulled toward the front frame 111 by the contraction operation of the intermediate jack 116 (for example, Patent Document 1). Here, FIG. 10 is a plan view of a conventional Messel shield device, and FIG. 11 is a view taken along the line AA of FIG.

Japanese Unexamined Patent Publication No. 2001-288985

However, in the conventional Messel shield device 100, when the front Messel 113 is moved forward by the press-fit jack 115, if there is a large rock or the like in the front direction of the front Messel 113, the rock or the like collides with the front Messel 113. , The front messel 113 that collided with the rock or the like cannot be moved in the forward direction. In this way, when the front Messel 113 collides with the rock or the like and cannot move in the forward direction, the other front Messel 113 that does not collide with the rock or the like moves in the forward direction, so that the Messel Shielding Device 100 plans. There was a problem that it would move in a different direction. In this way, if the Messel Shielding Device 100 advances in a direction different from the plan, there arises a problem that the construction must be stopped for a long period of time in order to correct the Messel Shielding Device 100 in the planned traveling direction. there were.

If there is a water pipe or gas pipe (hereinafter referred to as "water pipe, etc.") in the direction ahead of the front Messel 113 that has been moved in the forward direction, the water can be supplied by moving the front Messel 113 in the forward direction. There was a possibility that the pipes etc. would be destroyed. In this way, when the water pipe is destroyed by the front Messel 113, water overflows from the destroyed water pipe in the hole excavated to bury the underground structure, and the water overflowing from the water pipe overflows. Since it is necessary to discharge the water from the hole, the construction work has to be stopped for a long period of time, and there is a problem that the water supply will be cut off in the neighborhood and cause trouble to the residents in the neighborhood. Further, when the waste pipe is destroyed by the front Messel 113, there is a risk of causing a gas explosion when the gas overflowing from the gas pipe is ignited.

The present invention has been made in view of the above problems, and it is possible to prevent the burial work of the underground buried structure from being prolonged due to the Messel shield device moving in a direction different from the plan, and the water pipe is provided by the front Messel. It is an object of the present invention to provide a Messel shield device capable of ensuring the safety of burial work of an underground buried structure without being destroyed, and an open pit construction method using the Messel shield device.

In order to solve the above problems and achieve the above object, in the first aspect of the present invention, an intermediate jack is connected between the front frame and the tail frame, and an underground buried structure such as a box calvert is provided. It is a messell shield device to be buried, and it is provided corresponding to each of a plurality of front messels provided in the vertical direction on both left and right sides of the front frame and a plurality of front messels provided in the front-rear direction. A press-fitting jack to move, a pressurizing force measuring means for individually measuring the pressing force that presses the front mezzle forward when the front messel is moved forward while penetrating the ground, and a pressing force. It is characterized in that when the pressing force measured by the measuring means is equal to or higher than a predetermined pressing force, the forward movement drive of the front Messel is stopped.

According to the present invention, when the front Messel is moved forward while penetrating the ground, the pressing force for pressing the front Messel forward is measured by the pressing force measuring means, and the pressing force is measured by the pressing force measuring means. When the applied pressing force is equal to or greater than the predetermined pressing force, the forward movement drive of the front Messel is stopped, so even if there is a large rock or the like in the front direction of the front Messel, it collides with the large rock or the like. As a result, it is possible to prevent the Messel shield device from bending in the traveling direction, and even if there is a water pipe or gas pipe in the direction ahead of the front Messel, it is safe without damaging the water pipe or gas pipe. Can be enhanced.

The second aspect of the present invention is the messel shield device according to the first aspect, in which a plurality of front messels have the same height on the left and right in the vertical direction, and the front messel is sequentially forward from above or below. It is characterized by being moved to.

According to the present invention, there are a plurality of front messels at the same height on the left and right in the vertical direction, and the front messels are sequentially moved forward from above or below, so that when the front messels collide with a rock, a water pipe, a gas pipe, or the like. In addition, by examining the front message that collided, it is possible to accurately know the height position of the rock, water pipe, gas pipe, etc. that collided.

The third aspect of the present invention is the Messel shield device according to the first aspect, which emits light when the pressing force measured by the pressing force measuring means exceeds a predetermined pressing force. It is characterized by further having a light emitting lamp.

According to the present invention, there is an abnormal light emitting lamp that emits light when the pressing force measured by the pressing force measuring means becomes a predetermined pressing force or more. Can inform you that has collided with rocks, water pipes, gas pipes, etc.

The fourth aspect of the present invention is the Messel shield device according to the first aspect, which emits a sound when the pressing force measured by the pressing force measuring means becomes equal to or higher than a predetermined pressing force. It is characterized by having an abnormal buzzer further.

According to the present invention, there is an abnormal buzzer that emits a sound when the pressing force measured by the pressing force measuring means exceeds a predetermined pressing force. Therefore, the abnormal buzzer emits a sound to generate a front message. Can inform you that has collided with a rock, water pipe, gas pipe, etc.

The fifth aspect of the present invention is the Messel shield device according to the second aspect, wherein the pressing pressure measuring means measures the oil pressure for pressing the front Messel in the forward direction. It is something to do.

The sixth aspect of the present invention is the messel shield device according to the fifth aspect, in which a plurality of tail messels are provided in the vertical direction at the same height as the front messels on both the left and right sides of the tail frame. It is characterized by further having.

The seventh aspect of the present invention is an open pit construction method using the Messel shield device according to the sixth aspect, wherein the front Messel is sequentially moved forward from above or below. The front messel ground penetration process in which the front messel is sequentially penetrated into the ground in front, and the front messel push pressure measurement process in which the oil pressure at which the front messel is pressed is measured during the execution of the front messel ground penetration process. It has a front Messel movement stop step of stopping the forward movement drive of the front Messel when the oil pressure measured by the front Messel push pressure measuring step is equal to or higher than a predetermined oil pressure.

According to the present invention, when the oil pressure measured by the front messenger pressing pressure measuring step is equal to or higher than a predetermined oil pressure, the front messenger movement stop step stops the forward movement drive of the front messenger. Even if a large rock or the like exists in the front direction, it is possible to prevent the Messel shield device from bending in the traveling direction due to collision with the large rock or the like, and a water pipe or a gas pipe is provided in the front direction of the front Messel. Even if it exists, it is possible to improve safety without destroying the water pipe or gas pipe.

The eighth aspect of the present invention is the messel shield device according to the sixth aspect, and the front frame can be disassembled for each height of the plurality of front messels on the left and right sides. The tail frame can be disassembled for each height of the tail messels provided at the same height as the plurality of front messels on the left and right sides, and the hydraulic pressure is set to a predetermined hydraulic pressure or higher by the pressing force measuring means. It is characterized in that the tail messel and the tail frame are removed together with the front messel and the front frame which are equal to or higher than the height of the measured and stopped front messel.

According to the present invention, the tail messel and the tail frame are removed together with the front messel and the front frame whose oil pressure is measured to be equal to or higher than a predetermined hydraulic pressure and is equal to or higher than the height of the stopped front messel. The Messel shield device below the front Messel that collided can advance the lower part of the water pipe or gas pipe in the forward direction, and the burial work of the underground buried structure can be continued without interruption.

The ninth aspect of the present invention is an open pit construction method using the Messel shield device according to the eighth aspect, in which the front Messel is sequentially moved forward from above or below to the front. The front Messel ground penetration process in which the Messel is sequentially penetrated into the ground in front, the front Messel pressing pressure measurement process in which the oil pressure at which the front Messel is pressed is measured during the execution of the front Messel ground penetration process, When the oil pressure measured by the front Messel push pressure measurement process is equal to or higher than the predetermined oil pressure, the front Messel movement stop process for stopping the forward movement drive of the front Messel and the front Messel stop for the front Messel movement stop process. It has a Messel shield device upper removal step, in which the tail Messel and tail frame are removed, along with a front Messel and front frame that is greater than or equal to the height of the stopped front Messel. Is characterized in that it is executed when the pressing pressure of the front Messel becomes equal to or higher than a predetermined oil pressure due to the collision of the front Messel with the water pipe or the gas pipe.

According to the present invention, when the front Messel collides with a water pipe or a gas pipe and the pressing force of the front Messel exceeds a predetermined oil pressure, the height of the front Messel colliding with the water pipe or the gas pipe is high. Since the tail message and the tail frame are removed together with the front message and the front frame, the Messel shield device below the front message that collided with the water pipe or gas pipe is advanced forward in the lower part of the water pipe or gas pipe. It is possible to continue the burial work of the underground buried structure without interruption.

According to the present invention, it is possible to prevent the burial work of the underground buried structure from being prolonged due to the Messel shield device moving in a direction different from the plan, and the front Messel does not destroy the water pipe or the like and the underground buried structure. The safety of the burial work of objects can be ensured.

It is a schematic diagram which shows the construction state of the Messel shield apparatus in 1st Embodiment of this invention. It is a perspective view of the Messel shield device. It is a top view of the Messel shield device. (A) It is a front view of the Messel shield device. (B) It is a rear view of the Messel shield device. FIG. 4B is a cross-sectional view taken along the line BB in FIG. 4 (a). It is a system block diagram of the Messel shield apparatus in 1st Embodiment of this invention. It is a flowchart of an open pit construction method using the Messel shield device. It is a flowchart of the Messel shield device forward movement process of the same open pit construction method. It is a flowchart of the Messel shield device forward movement process of the open pit construction method using the Messel shield device in the 2nd Embodiment of this invention. It is a top view of the conventional Messel shield device. FIG. 10A is a diagram of FIG.

(First Embodiment)
The Messel shield device according to the first embodiment of the present invention will be described with reference to the drawings. Here, FIG. 1 is a schematic view showing the construction status of the Messel shield device according to the first embodiment of the present invention. In this embodiment, the case where the box culvert 2 is laid as the underground buried structure will be described, but the underground buried structure is not limited to the box culvert 2 and may be another underground buried structure. Here, the box culvert 2 is a structure buried under the road and used for a sewer, a rainwater drainage pipe, and the like.

As shown in FIG. 1, the ground is excavated, the bottom surface of the excavated ground is solidified, and the Messel shield device 1 having a self-propelled function is used on the solidified ground to underground such as a box culvert 2. A buried structure is laid. Then, after the box culvert 2 is laid, the excavated ground is filled and returned to the original state.

Next, the Messel shield device according to the first embodiment of the present invention will be described with reference to FIGS. 2 to 5. Here, FIG. 2 is a perspective view of the Messel shield device according to the first embodiment of the present invention, FIG. 3 is a plan view of the Messel shield device, and FIG. 4A is a front view of the Messel shield device. Yes, FIG. 4 (b) is a rear view of the Messel shield device, and FIG. 5 is a sectional view taken along the line BB of FIG. 4 (a).

In the Messel shield device 1, an intermediate jack 30 is connected between the front frame 10 and the tail frame 20, and the box culvert 2 is embedded (see FIG. 5). In the front frame 10, a cutting beam 13 is arranged between the left and right frames integrally composed of the vertical column member 11 and the horizontal reinforcing member 12 (see FIGS. 3 and 5). Further, the horizontal beam 21 extending in front of the tail frame 20 is placed on the support beam 14 extending behind the front frame 10, and is configured to prevent the tail frame 20 from sinking. .. The front messel 40 and the tail messel 41 are slidably arranged on both sides of the front frame 10 and the tail frame 20, and the front messel 40 and the tail messel 41 are connected by a pin. Four front messels 40 are provided on both the left and right sides of the front frame 10 in the vertical direction. Specifically, the front messels 40 provided on both the left and right sides have the same height in the vertical direction on the left and right, and four are provided in the vertical direction. Further, the tail Messel 41 is also provided on both the left and right sides of the tail frame 20 at the same height as the four front Messels 40 in the vertical direction. In the present embodiment, four front Messels 40 (similar to the tail Messel 41) are provided in the vertical direction on each of the left and right sides, but the present invention is not limited to this, and three to six in the vertical direction on each of the left and right sides (preferably). A plurality of such as 4 to 5) may be provided.

The front frame 10 and each front messel 40 are connected by a press-fit jack 15 (see FIG. 5). The press-fitting jacks 15 are provided corresponding to each of the four front messels 40 provided on each of the left and right sides, and the front messels 40 can be moved in the front-rear direction. Specifically, oil is sent to the left and right press-fit jacks 15 (15a, 15b) by the hydraulic pumps 31 (31a, 31b), and the left and right press-fit jacks 15 (15a, 15b) are operated, respectively. The left and right front messels 40 can be moved in the front-rear direction (see FIG. 6). The hydraulic pump 31 (31a, 31b) is operated by a motor 34 (34a, 34b). Here, in FIG. 6, "a" is attached to the right side and "b" is attached to the left side to distinguish them from each other. Further, oil is normally sent to the press-fit jack 15 from the hydraulic pump 31 at an oil pressure of 15 MPa. As described above, the press-fit jack 15 normally presses the front messel 40 with an oil pressure of 15 MPa. Further, a manual switching valve 32 (32a, 32b) is provided between the left and right hydraulic pumps 31 (31a, 31b) and the press-fitting jack 15 (15a, 15b), and the manual switching valve 32 is operated by the operator. This makes it possible to switch the push-pull (push or pull-in) of the press-fit jack 15. That is, the front frame 10 is pressed forward by operating the manual switching valve 32 in the direction in which the press-fit jack 15 is pressed. Further, the front frame 10 is pulled in the rear direction by operating the manual switching valve 32 in the direction in which the press-fit jack 15 is pulled in. The press-fitting jacks 15 (15a, 15b) and the manual switching valve 32 are operated by an operation plate (not shown) installed above the control unit 18 (control means) described later. Further, between the left and right press-fitting jacks 15 (15a, 15b) and the hydraulic pumps 31 (31a, 31b), a hydraulic sensor 33 (pressing pressure) for measuring the oil pressure sent to the press-fitting jacks 15 (15a, 15b). Measuring means) is provided. In this way, the hydraulic pressure sensor 33 can measure the pressing force for pressing the front Messel 40 in the forward direction for each front Messel 40 by measuring the oil pressure sent to the press-fitting jack 15. In the present embodiment, the pressing force pressed by the front Messel 40 in the forward direction is measured by the hydraulic pressure sensor 33, but the present invention is not limited to this, and the pressing force measuring means other than the hydraulic sensor is used to move the front Messel 40 forward. The pressing force pressed in the direction may be measured. Further, in the present embodiment, four press-fitting jacks 15 are provided corresponding to the front messel 40, but the present invention is not limited to this. The same number as 40 is provided. Here, FIG. 6 is a system configuration diagram of the Messel shield device according to the first embodiment of the present invention.

A bottom messel 17 is slidably arranged on the bottom of the front frame 10 via a bottom jack 16 (see FIG. 5). Further, a sled body 22 is arranged at the bottom of the tail frame 20. Here, the bottom jacks 16 (16a, 16b) are also supplied with oil by the hydraulic pumps (31a, 31b), and the manual switching valve 32 (32a, 32b) is operated by the operator to operate the bottom jacks 16 (16a, 16b). ) Can be switched between pushing and pulling (pushing or pulling in).

The front messel 40 is dug in the excavation direction by operating the press-fit jack 15, the bottom messel 17 is excavated in the excavation direction by operating the bottom jack 16, and the tail frame 20 is the front frame due to the contraction of the intermediate jack 30. It is drawn in 10 directions. Further, as the front Messel 40 moves in the forward direction, the tail Messel 41 connected to the front Messel 40 with a pin is also moved in the forward direction.

The control of the press-fit jack 15, the bottom jack 16, the intermediate jack 30, and the like is performed by the control unit 18 (control means) mounted on the upper part of the front frame 10.

In the tail frame 20, the tail messel 41 is supported by a frame body 25 integrally composed of a vertical column member 23 and a horizontal reinforcing material 24, and a flat U-shaped cutting beam 26 is provided in front of the frame body 25 as the horizontal reinforcing material 24. A reinforcing material 28 is provided at the joint portion between the girder 26 and the lateral reinforcing material 24 (see FIGS. 3 and 5). A hanging space 27 for hanging the box culvert 2 is formed between the facing frames 25 (see FIG. 3). The hanging space 27 is open above and behind the space.

Next, the operation and operation of the Messel shield device 1 will be described.

When the front Messel 40 of the Messel shield device is started, the press-fitting jack 15 is driven by the hydraulic pressure of 15 MPa sent from the hydraulic pump 31, and the press-fitting jack 15 moves the front Messel 40 in the forward direction. Specifically, when the Messel Shielding Device 1 is moved straight forward, four front Messels 40 at the same height on the left and right are provided from the front Messel 40 at the upper left and right ends of the four front frames 41 provided in the vertical direction on each side. Driven at the same time, it moves forward by the same length while penetrating the ground. Then, when the front frame 10 is moved and driven in the forward direction, the hydraulic pressure from the hydraulic pump 31 sent to the press-fitting jack 15 for driving the front Messel 40 is measured by the left and right hydraulic sensors 33 (33a, 33b). Ru. The hydraulic pressure sent from the hydraulic pump 31 measured by the hydraulic sensor 33 is a pressing force that presses the front Messel 40 in the forward direction by the press-fitting jack 15. In the present embodiment, the Messel shield device 1 is moved straight forward, but the present invention is not limited to this, and the Messel shield device 1 may be moved so as to bend to the right or left. In this case, the front messels 40 having the same height on the left and right are driven from the front frames 41 at the upper left and right ends of the front frame 41, and the left and right front messels 40 move by different lengths in the forward direction. Further, in the present embodiment, the front Messel 40 is driven from the upper left and right upper ends, but the present invention is not limited to this, and the front Messel 40 at the same height on the left and right may be driven from the front Messel 40 at the lower left and right ends.

When a rock exists in the front direction of the front Messel 40, which is the second stage from the top of the Messel Shield Device 1, when it is moved in the front direction of the front Messel 40, which is the second stage from the top stage, the front Messel 40 is moved from the top to the second stage. The front Messel 40 of the eye is moved forward, and the second front Messel 40 from the top tier collides with the rock. In this way, when the front Messel 40 collides with the rock, the oil pressure sent from the hydraulic pump 31 measured by the hydraulic sensor 33 increases. That is, the front messel 40 cannot be moved forward due to the presence of rocks, and the front messel 40 is strongly pressed. Therefore, a hydraulic pump is applied to the press-fit jack 15 that gives a driving force to the front messel 40. The oil pressure sent from 31 will increase. Then, when the hydraulic pressure sensor 33 measures that the hydraulic pressure sent from the hydraulic pump 31 to the press-fitting jack 15 is 18 MPa or more, the signal is transmitted from the hydraulic pressure sensor 15 to the control unit 18 (control means) to control the control unit. 18 (control means) stops the forward movement drive of the front Messel 40. As a result, oil is not supplied from the hydraulic pump 31 to the press-fit jack 15, and the front messel 40 does not move in the forward direction. Then, when the oil pressure measured by the hydraulic sensor 33 becomes 18 MPa or more, the abnormal light emitting lamp (not shown) installed on the upper part of the control unit 18 (control means) emits light, and the abnormal buzzer (not shown) is emitted. Makes a sound. This makes it possible to notify the operator that the front messel 40 has collided with a rock or the like. In this embodiment, when the hydraulic pressure sensor 33 measures that the hydraulic pressure sent from the hydraulic pump 31 to the press-fitting jack 15 is 18 MPa or more, the forward movement drive of the front Messel 40 is stopped. However, not limited to this, when the hydraulic pressure sensor 33 measures that the oil pressure sent from the pressure pump 15a to the press-fitting jack 15 is equal to or higher than a predetermined pressing force, the front Messel 40 is driven to move in the forward direction. May be stopped. Further, in the present embodiment, the abnormal light emitting lamp (not shown) and the abnormal buzzer (not shown) are installed above the control unit 18 (control means), but the present invention is not limited to this, and the front or rear of the Messel shield device 1 is not limited to this. It may be installed in a conspicuous place such as any of the four corners of.

Next, the construction procedure of the open pit construction method using the Messel shield device according to the first embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is a flowchart of an open pit construction method using the Messel shield device according to the first embodiment of the present invention.

First, in S1, the excavation process is carried out. In this excavation process, a hole for burying Box Carbate 2 (underground buried structure) was excavated using a back four, and the bottom surface of the excavated ground was solidified and solidified. The Messel shield device 1 having a self-propelled function is moved to the ground. Then, proceed to S2.

In S2, the step of moving the Messel shield device forward is carried out. In this Messel shield device forward movement step, the Messel shield device is moved forward. Specifically, the following steps S21 to S28 are carried out (see FIG. 8). Here, FIG. 8 shows a Messel shield device of an open pit method using the Messel shield device according to the first embodiment of the present invention. It is a flowchart of the forward movement process.

In S21, the front Messel ground intrusion process is carried out. In this front Messel ground penetration step, by operating the press-fit jack 15, the front Messel 40 is sequentially moved forward from above, and the front Messel 40 is sequentially penetrated into the front ground. Specifically, the left and right front Messels 40 move sequentially from above to the front from above, sequentially from above the front Messel 40 consisting of four upper and lower stages, in the order of 1st stage → 2nd stage → 3rd stage → 4th stage. Will be done. Here, as the front Messel 40 moves in the forward direction, the tail Messel 41 connected to the front Messel 40 with a pin is also moved in the forward direction. In the present embodiment, the front Messel 40 is sequentially moved forward from above, but the present invention is not limited to this, and the front Messel 40 may be sequentially moved forward from below. Then, the process proceeds to S22.

In S22, the front Messel pressing pressure measuring step is carried out. In this front messel pressing pressure measuring step, the oil pressure at which the front messel 40 is pressed is measured during the implementation of the front messel forward moving step. Specifically, the oil pressure supplied from the hydraulic pump 31 (31a, 31b) to the press-fitting jacks 15 (15a, 15b) is measured by the hydraulic sensor 33 (33a, 33b). Here, in the hydraulic pressure sensor 33 (33a, 33b), the oil pressure to be supplied to the left and right press-fitting jacks 15 (15a, 15b) is measured individually on the left and right sides. Then, the process proceeds to S23.

In S23, it is determined whether the oil pressure detected by the hydraulic sensor 33 (33a, 33b) is 18 MPa or more. If it is determined that the oil pressure detected by the oil pressure sensor 33 (33a, 33b) is not 18 MPa or more, the process proceeds to S26, and the oil pressure detected by the oil pressure sensor 33 (33a, 33b) is determined to be 18 MPa or more. If so, proceed to S24. The case where the oil pressure of the hydraulic pressure sensors 33 (33a, 33b) becomes 18 MPa or more is the case where the oil pressure of at least one of the left and right hydraulic sensors 33 (33a, 33b) becomes 18 MPa or more. .. In the present embodiment, it is determined that the oil pressure detected by the oil pressure sensor 33 (33a, 33b) is 18 MPa or more, but the present invention is not limited to this, and as described above, it is detected by the oil pressure sensor 33 (33a, 33b). It may be determined that the oil pressure is equal to or higher than the predetermined oil pressure. In the present embodiment, the case where the oil pressure of the hydraulic sensor 33 becomes 18 MPa or more due to the collision of the second stage front messel 40 with the rock will be described below.

In S24, the front Messel movement stop step is carried out. In this front messel movement stop step, when the hydraulic pressure of the hydraulic sensors 33 (33a, 33b) becomes 18 MPa or more, the forward movement drive of the front messel 40 which is being moved and driven in the forward direction is stopped. Specifically, the movement drive of the second-stage front Messel 40, which is moved and driven in the forward direction, is stopped. In this way, when the second-stage front Messel 40 collides with the rock and cannot move in the forward direction, the other second-stage front Messel 40 that does not collide with the rock moves in the forward direction. , The Messel shield device 1 will move in a direction different from the plan, but as described above, the movement drive of the second stage front Messel 40, which is driven to move forward, is stopped, so that rock. It is possible to prevent the Messel shield device 1 from bending in the traveling direction due to the collision with the Messel shield device 1. In the present embodiment, it is said that the movement drive of the left and right front messels 40 of the second stage that collided with the rock is stopped, but after the movement drive of the front messel 40 of the second stage is stopped, it moves forward. All the front Messels 40 that are driven to move may be moved backward. Then, the process proceeds to S25.

In S25, a rock fracture step is carried out. In this rock breaking process, the rock that the front Messel 40 collided with is broken. By destroying the rock with which the front Messel 40 collided in this way, the obstacle to the forward movement of the Messel shield device 1 is eliminated, and the Messel shield device 1 can be moved in the forward direction as planned. .. When the rock breaking process is completed, the front Messel ground intrusion process (S21) is restarted, but the illustration is omitted in FIG. Then, the process proceeds to S26.

In S26, it is determined whether or not the front Messel forward movement process has been completed. Whether or not this front messel forward movement step is completed is determined by the fact that all the front messels 40 in the upper and lower four stages move in the forward direction. Then, in S26, if it is determined to be "No", the processing of S21 → S22 → ... → S26 is performed until it is determined to be “Yes”, and if it is determined to be “Yes”, the process proceeds to S27. ..

In S27, the bottom Messel ground intrusion process is carried out. In this bottom messel ground intrusion step, by operating the bottom jack 16, the bottom messel 17 is sequentially moved forward from the left and right, and the bottom messel 17 is sequentially penetrated into the front ground. Specifically, the left and right bottom messels 17 are sequentially moved forward from the left and right ends of the bottom Messel 17 consisting of three left and right, simultaneously from the left and right ends, and the first, second, and third left and right ends. Will be done. Then proceed to S28.

In S28, the intermediate jack shrinkage step is carried out. In this intermediate jack contraction step, the tail frame 20 is pulled toward the front frame 10 by contracting the intermediate jack 30 between the front frame 10 and the tail frame 20. This completes the process of moving the Messel shield device forward. Then, proceed to S3.

In S3, the box culvert installation process is carried out. In this box culvert installation process, the box culvert 2 is installed. Specifically, the box culvert 2 is suspended from the crane 51, and the box culvert 2 is installed (see FIG. 1). If the box culvert 2 is already installed, the box culvert 2 is installed by engaging and coupling with the end of the already installed box culvert 2. Then, proceed to S4.

In S4, it is determined whether all the box culverts 2 have been installed. Then, in S4, if it is determined to be "No", the process proceeds to S5, and the processes of S5 → S2 → S3 → S4 are performed until it is determined to be “YeS”. Proceed to S6.

In S5, the forward excavation process is carried out. In this forward excavation process, the front of the box carbide 2 (underground buried structure) is excavated using a back four. Then, proceed to S2. In the present embodiment, it has been described that the forward excavation step (S5) is carried out separately from the Messel shield device forward movement step (S2), but the present invention is not limited to this, while the Messel shield device forward movement step is being carried out. , The forward excavation process may be carried out.

In S6, the ground burial process is carried out. In this ground burial process, soil is poured from the upper part of the box culvert 2 to the surrounding area, and the excavated ground is filled and returned to the original state. This completes the open pit construction method.

As described above, when the oil pressure measured by the front Messel pressing pressure measuring step (S22) is 18 MP or more, the front Messel movement stop step (S24) stops the forward movement drive of the front Messel 40. Even if there is a large rock in the direction ahead of the front Messel 40, it is possible to prevent the Messel shield device from bending in the traveling direction due to collision with the large rock, and the rock with which the front Messel 40 collided is destroyed. By doing so, the Messel shield device 1 can be moved in the forward direction as planned.

(Second Embodiment)
Next, the Messel shield device according to the second embodiment of the present invention will be described with reference to the drawings. Here, the Messel shield device 1 of the first embodiment of the present invention has a structure in which the front frame 10 and the tail frame 20 cannot be divided for each height of the front Messel 40, but the Messel shield device 1 of the second embodiment ( In (not shown), the structure is different in that the front frame 10 and the tail frame 20 can be divided according to the height of the front messel 40. Hereinafter, the same contents of the first embodiment will be omitted.

The front messels provided on both the left and right sides have the same height in the vertical direction on the left and right, and four are provided in the vertical direction. The front frame and the tail frame can be divided at the height of each front messel, and the divided parts are connected by bolts. Then, by removing the bolt, the front frame and the tail frame can be divided at the height position of each front messel. Specifically, when dividing by the height of the front messel of the second stage from the top stage, the front frame of the second stage, the front frame of the third stage, and the second stage below the front messel of the second stage from the top stage. By removing the connecting bolt at the joint between the tail frame of the step and the tail frame of the third step, the tail messel and the tail frame are combined with the front messel and the front frame that are higher than the height of the front messel of the second step from the top step. Can be removed. Then, after the front messel and the front frame, the tail messel, and the tail frame higher than the height of the front messel in the second stage from the uppermost stage are removed, the control unit 18 (control) mounted on the upper part of the front frame in the uppermost stage. Means) etc. are placed on the upper part of the third stage front frame. That is, a flat floor plate is installed on the upper part of the front frame of each stage, and a control unit 18 (control means) or the like is placed on the upper part of the floor plate.

Next, the construction procedure of the open pit construction method using the Messel shield device in the second embodiment of the present invention will be described with reference to FIG. FIG. 9 is a flowchart of the Messel shield device forward movement step of the open pit method using the Messel shield device according to the second embodiment of the present invention. In the open pit construction method using the Messel shield device in the second embodiment of the present invention, the "rock fracture step (S25)" was carried out in the open pit construction method in the first embodiment. The difference is that the process is "external process (S35)". Others are the same as those in the first embodiment, and thus the description thereof will be omitted. In the present embodiment, a case where the oil pressure of the hydraulic sensor becomes 18 MPa or more due to the collision of the front messel in the second stage from the uppermost stage with the water pipe will be described.

In S35, the step of removing the upper part of the Messel shield device is carried out. In this Messel shield device upper removal step, after the front messel is stopped by the front messel movement stop step (S24), the tail is combined with the front messel and the front frame equal to or higher than the height of the stopped second-stage front messel. Messel and tail frame are removed. In this embodiment, as in the first embodiment, when the hydraulic pressure sensor 33 measures that the oil pressure sent from the hydraulic pump 31 to the press-fitting jack 15 is 18 MPa or more, the front Messel is driven to move in the forward direction. However, this is not limited to this, and when the hydraulic pressure sensor 33 measures that the oil pressure sent from the pressure pump 15a to the press-fitting jack 15 is equal to or higher than a predetermined pressing force, the front message cell 40 is stopped. The forward movement drive may be stopped.

In this way, when the pressing force of the front Messel becomes 1.8 MPa or more due to the collision of the front Messel with the water pipe or gas pipe, the height of the front Messel that collides with the water pipe or gas pipe is higher than the height of the front Messel. Since the tail message and tail frame are removed together with the front message and front frame, the Messel shield device below the front message that collided with the water pipe or gas pipe can be advanced forward in the lower part of the water pipe or gas pipe. , The burial work of the underground buried structure can be continued without interruption.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Messel shield device 2 Box calvert 10 Front frame 11 Vertical column 12 Horizontal reinforcement 13 Cutting beam 14 Support beam 15 Press-fit jack 16 Bottom jack 17 Bottom Messel 18 Control unit 20 Tail frame 21 Horizontal beam 22 Sleeve 23 Vertical column 24 Horizontal reinforcement 25 Frame body 26 Cutting beam 27 Suspended space 28 Reinforcing material 30 Intermediate jack 31 Hydraulic pump 32 Manual switching valve 33 Hydraulic sensor 40 Front Messel 41 Tail Messel 51 Crane

In order to solve the above problems and achieve the above object, in the first aspect of the present invention, an intermediate jack is connected between the front frame and the tail frame, and an underground buried structure such as a box calvert is provided. It is a Messel shield device to be buried, and a front Messel that is provided on both the left and right sides of the front frame at the same height on the left and right in the vertical direction and is sequentially moved forward from above or below, and a plurality of fronts that are provided. A press-fit jack that is provided corresponding to each of the Messels and moves the front Messel in the front-rear direction, and an oil pressure that presses the front Messel in the forward direction when the front Messel is moved forward while penetrating the ground. The front frame has a pressing force measuring means for individually measuring the front messels, and a plurality of tail messels provided on the left and right sides of the tail frame at the same height as the front messels in the vertical direction. It can be disassembled for each height of the multiple front messels on the left and right sides, and the tail frame is for each height of the tail messels provided at the same height as the multiple front messels on the left and right sides. When it can be disassembled and the pressing force measured by the pressing force measuring means is equal to or higher than the predetermined pressing force, the forward movement drive of the front Messel is stopped, and the hydraulic pressure is measured to be equal to or higher than the predetermined hydraulic pressure and stopped. It is characterized in that the tail messels and the tail frame are removed together with the front messels and the front frame that are higher than the height of the front messels .

According to the present invention , the tail messel and the tail frame are removed together with the front messel and the front frame whose oil pressure is measured to be equal to or higher than a predetermined hydraulic pressure and is equal to or higher than the height of the stopped front messel. The Messel shield device below the front Messel that collided can advance the lower part of the water pipe or gas pipe in the forward direction, and the burial work of the underground buried structure can be continued without interruption.

The second aspect of the present invention is an open pit construction method using the Messel shield device according to the first aspect, in which the front Messel is sequentially moved forward from above or below to the front. The front Messel ground penetration process in which the Messel is sequentially penetrated into the ground in front, the front Messel pressing pressure measurement process in which the oil pressure at which the front Messel is pressed is measured during the execution of the front Messel ground penetration process, When the oil pressure measured by the front Messel push pressure measurement process is equal to or higher than the predetermined oil pressure, the front Messel movement stop process for stopping the forward movement drive of the front Messel and the front Messel stop for the front Messel movement stop process. It has a Messel shield device upper removal step, in which the tail Messel and tail frame are removed, along with a front Messel and front frame above the height of the stopped front Messel, and a Messel shield device upper removal step. Is characterized in that it is executed when the pressing pressure of the front Messel becomes equal to or higher than a predetermined oil pressure due to the collision of the front Messel with the water pipe or the gas pipe.

Claims (9)

A Messel shield device in which an intermediate jack is connected between the front frame and the tail frame to bury underground structures such as box culverts.
A plurality of front messels provided in the vertical direction on both the left and right sides of the front frame, and
A press-fit jack that is provided corresponding to each of the plurality of front messels and that moves the front messel in the front-rear direction.
When the front messel is moved forward while penetrating the ground, a pressing force measuring means for individually measuring the pressing force for pressing the front messel in the forward direction, and a pressing force measuring means.
A Messel shield device comprising stopping the forward movement drive of the front Messel when the pressing force measured by the pressing force measuring means is equal to or higher than a predetermined pressing force. The messel shield device according to claim 1, wherein the front messel has a plurality of front messels at the same height on the left and right in the vertical direction, and is sequentially moved in the forward direction from above or below. The Messel shield device according to claim 1, further comprising an abnormal light emitting lamp that emits light when the pressing force measured by the pressing force measuring means becomes equal to or higher than a predetermined pressing force. The Messel shield device according to claim 1, further comprising an abnormal buzzer that emits a sound when the pressing force measured by the pressing force measuring means becomes equal to or higher than a predetermined pressing force. The Messel shield device according to claim 2, wherein the pressing force measuring means measures an oil pressure for pressing the front Messel in the forward direction. The messel shield device according to claim 5, further comprising a plurality of tail messels provided on the left and right sides of the tail frame at the same height as the front messel in the vertical direction. A front messel ground intrusion step in which the front messel is sequentially intruded into the front ground by sequentially moving the front messel from above or below in the forward direction.
During the execution of the front Messel ground penetration process, the front Messel pressing pressure measuring step in which the oil pressure at which the front Messel is pressed is measured, and the front Messel pressing pressure measuring step.
The messel according to claim 6, further comprising a front messel movement stop step of stopping the forward movement drive of the front messel when the oil pressure measured by the front messel pressing pressure measuring step is equal to or higher than a predetermined oil pressure. Open pit construction method using a shield device. The front frame can be disassembled at each height of the plurality of front messels on the left and right sides.
The tail frame can be disassembled at each height of the tail messels provided at the same height as the plurality of front messels on the left and right sides.
The tail messel and the tail frame are removed together with the front messel and the front frame having a hydraulic pressure equal to or higher than a predetermined hydraulic pressure and having a height equal to or higher than the stopped front messel by the pressing pressure measuring means. The Messel shield device according to claim 6, wherein the Messel shield device is characterized. A front messel ground intrusion step in which the front messel is sequentially intruded into the front ground by sequentially moving the front messel from above or below in the forward direction.
During the execution of the front Messel ground penetration process, the front Messel pressing pressure measuring step in which the oil pressure at which the front Messel is pressed is measured, and the front Messel pressing pressure measuring step.
When the oil pressure measured by the front messel push pressure measuring step is equal to or higher than a predetermined oil pressure, the front messel movement stop step of stopping the forward movement drive of the front messel, and the front messel movement stop step.
After the front messel is stopped by the front messel movement stop step, the tail messel and the tail frame are removed together with the front messel and the front frame at a height equal to or higher than the stopped front messel. With the upper removal process,
The step of removing the upper part of the Messel shield device is characterized in that it is executed when the pressing pressure of the front Messel becomes a predetermined oil pressure or more due to the collision of the front Messel with a water pipe or a gas pipe. An open pit construction method using the Messel shield device according to claim 8.

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