JP2966765B2 - Underground construction members burying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention reduces horizontal boring, facilitates and rational installation of traction members for underground construction members, improves construction accuracy, facilitates installation of traction jacks, and jack space. The present invention relates to an underground construction member burying method capable of reducing the size of a building.

[0002]

2. Description of the Related Art Conventionally, this type of construction method has been adopted as a non-cutting method in, for example, under-track crossing work, and among these methods, a fronting jacking method and a PCR (PRESTRESSEDED C
The ON-CRETE ROOF METHOD) method is known. Among them, the fronte jacking method is, for example, as shown in Japanese Patent Publication No. 51-22731, a horizontal boring is performed from a starting shaft to a predetermined target position of a reaching shaft, the ground is penetrated, and a boring hole is used as a traction member. A PC steel wire is inserted, one end of the steel wire is connected to an underground structure, and the other end is connected to a traction jack installed in a reaching shaft, and the structure is pulled forward by the operation of the jack to pull the structure forward. It was pulled through and penetrated.

[0003] However, the above method requires horizontal boring every time a PC steel wire is laid, which increases the construction time and promotes an increase in the construction period and construction costs. On the other hand, excavation is performed while the cutting edge penetrates the ground. However, the cross-sectional shape of the cutting edge is very large, so that it is suitable for construction of large-scale underground structures such as underpasses and sidewalks, and is generally unsuitable for embedding small-scale underground construction members.

The PCR method is disclosed in Japanese Patent Publication No. 55-5055.
As in No. 7, an excavation pipe is connected to the front end of a precast concrete column having a center hole, a screw auger is accommodated in the center hole, and a number of concrete columns are formed along the contour of the planned structure. After digging into the ground by using a propulsion machine installed in a starting shaft, PC steel was inserted into each concrete column to introduce prestress into the concrete column.

Although this method is suitable for burying small-scale underground construction members, since each concrete column is press-fitted by a propulsion device, a large-scale starting shaft is required, and the construction becomes large-scale, and maintenance of construction accuracy is maintained. Is difficult and induces deformation of the ground.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem and is suitable for burying a small-scale underground construction member, reducing horizontal boring work, and simplifying and laying down the underground construction member easily and rationally. It is an object of the present invention to provide a method of burying underground construction members that can be performed, improve construction accuracy, easily install a towing jack, and reduce the jack space.

[0007]

For this reason, the method of burying underground construction members according to the present invention uses an underground construction in which an excavator is housed.
Removably mounting the cutting edge on the tip of the building member, 牽to the blade opening
Connect the traction member to the next traction member and connect the traction member
Towing to the arriving shaft via jack,
From the starting shaft to the reaching shaft,
In the method of burying an underground construction member, wherein the towing member is laid at a towing position of the next underground construction member,
A jack mount to which a jack can be attached via multiple support legs
And installed on the side of the reaching shaft to support the reaction force of the towing jack
Received on the side of the reaching shaft via the legs, ensuring a stable reaction force
And the reaction force is applied to the existing underground construction members.
There is no need to move existing underground
In addition, the construction of the underground construction members can be easily and rationally performed, and the construction accuracy is improved. Also,
Place the plurality of support legs on a plane on both sides of the traction member
And stably support the jack base, stabilizing the reaction force
And towing jacks to improve towing accuracy and improve construction accuracy
The top and the construction are made to be smooth or easy. The present invention is applied to jack bases for underground construction members that serve as construction standards.
Underground construction based on the above-mentioned construction standards with multiple support legs provided on a plane
Installed on both sides of the member to ensure a stable reaction force of the towing jack
While maintaining underground construction components
The accuracy and the laying and construction accuracy are to be improved . The present invention is based on the construction
The jack base of the underground construction member to be constructed
Installed on the side of the arrival shaft between adjacent underground construction members
Then, the plurality of support legs are placed on a plane,
Section to secure a stable reaction force of the towing jack,
Underground construction members constructed based on the construction standard underground construction members
Construction accuracy and jack space
We are trying to reduce the impact .

[0008]

According to the first aspect of the present invention, a traction jack can be attached.
Ability to reach a workable jack base via multiple support legs
And the reaction force of the towing jack is reached via the support legs
We receive in pit side part and secure stable reaction force. Like that
The existing underground construction members receive the reaction force
Movement of existing underground construction members such as the construction method
Installation of underground construction members is simple and rational.
And improve the construction accuracy. Also before
A plurality of support legs are installed on a plane on both sides of the traction member.
And stably support the jack base, stabilizing the reaction force
And towing jacks to improve towing accuracy and improve construction accuracy
The smoothness and simplicity of the above and construction are to be achieved. The invention according to claim 2 is provided on a jack base of an underground construction member serving as a construction standard.
The plurality of support legs are placed on a plane,
On both sides to ensure a stable reaction force of the towing jack
As well as accurate
And to improve the laying and construction accuracy . The invention according to claim 3 performs construction based on the underground construction member of the construction standard.
The jack cradle of the underground construction member is connected via multiple support legs.
Installed on the side of the arrival shaft between adjacent underground construction members,
A plurality of support legs are installed on a flat surface at the side end of each underground construction member.
To ensure a stable reaction force of the towing jack,
Of underground construction members based on existing underground construction members
While improving the degree, compact jack space
Plan .

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 13 show a ground where a ground structure 2 such as a railway is laid on the ground. A starting shaft 3 and a reaching shaft 4 are excavated on both sides of the vehicle 2, and an earth retaining member 5 such as H steel or steel sheet pile is driven into the excavated surface.

The starting shaft 3 is excavated to a size that can accommodate at least the buried pipe 6 which is an underground construction member.
Is excavated to at least an area where a horizontal boring device described later can be installed. The buried pipe 6 is arranged in parallel with the side wall portions 7a and 7a of the underpass 7 which is an underground structure to be constructed immediately below the above-ground structure 2 and the floor plate portion 7b. , One side is 250mm, length is 300
It is composed of a steel tube having a square cross section of 0 mm.

In this case, the buried pipe 6 may be formed of a concrete pipe having a rectangular, trapezoidal or circular cross section, or a composite pipe of steel plate and concrete, in addition to the square cross section. For this synthetic pipe, for example, if the left and right side walls are made of concrete and their upper and lower surfaces are connected by steel plates, it is possible to avoid a decrease in strength and increase in size when the whole is made of concrete, and when the whole is made of steel plate Of manufacturing costs can be avoided

The buried pipe 6 comprises a reference pipe 6a which is constructed with high accuracy and serves as another construction standard, and standard pipes 6b, 6c, 6d,... Which are constructed on the basis of the pipe 6a. In the embodiment, a single reference pipe 6a is disposed substantially at the center of the floor plate portion 7b, and standard tubes 6b, 6c, 6d... Are disposed on the other floor plate portion 7b and the side wall portions 7a, 7a. I have.

Inside the reference pipe 6a and the standard pipes 6b, 6c, 6d,..., A circular auger pipe 8 having the same length as that of the pipe is fixed. The auger 9 is rotatably accommodated.
Is protruded from the auger tube 8 and an auger motor 10 is attached to the distal end of the protruding portion. Also, a pair of guide rails 11 to 18 are arranged on the peripheral surface of the reference pipe 6a and the standard pipes 6b, 6c, 6d... Along the pipe axis direction, and these are L-shaped or symmetrical. Guide rails 11 to 18
Are mutually engageable.

In this case, the guide rails 11 to 18 may be formed in various cross-sectional shapes which can be engaged with each other, in addition to the above-mentioned shapes. The guide rails 11 to 18 can be omitted if the uneven portions that can be engaged with each other are formed.

On the other hand, the reference pipe 6a and the standard pipes 6b, 6c, 6
At the tip of d, a substantially box-shaped blade port 19 having the same cross-section as the above is detachably attached, and a first clamper 20 for detachably connecting a traction member described later to the peripheral surface of the blade port 19 is provided. ,
A second clamper 21 for detachably connecting the next traction member is provided. Of these, three first clampers 20 and four second clampers 21 are provided on the peripheral surface of the blade opening 19a attached to the reference pipe 6a, as shown in FIG. , 12.

Further, as shown in FIG. 4, two first clampers 20 and 1 are provided on the peripheral surface of the blade 19b attached to the standard pipe 6b.
The second clamper 21 is provided, of which the first clamper 20 is provided at a position facing the second clamper 21 of the cutting edge 19a, and the second clamper 21 is provided on the guide rail 1.
It is arranged at the center between 4,14.

Further, as shown in FIG. 5, one first and second clampers 20 and 21 are provided on the peripheral surface of the blade opening 19c attached to the standard pipe 6c.
Is provided at a position facing the second clamper 21 of the blade port 19b, and the second clamper 21 is disposed outside the upper guide rail 16.

As shown in FIG. 6, one of the first and second clampers 2 is provided on the peripheral surface of the blade port 19d attached to the standard pipe 6d.
The first clamper 20 is provided at a position facing the second clamper 21 of the cutting edge 19c, and the second clamper 21 is disposed at the center between the guide rails 18, 18.

These clampers 20 and 21 are configured such that one ends of similar traction members 22 and 23 made of PC steel strands or the like can be attached and detached and fixed. The rear end is fixed, and the front end of the next traction member 23 under no load is fixed to the second clamper 21, and the front side of the traction member 22 is connected to the traction jack 2.
4 and the rear end of the next traction member 23 is the starting shaft 3
Located on the side.

The towing jack 24 is mounted horizontally on jack stands 25, 26 for the reference pipe 6a or the standard pipes 6b, 6c,... Installed on the reaching shaft 4 side, and the front end thereof is connected to the jack receiving stands 27, 28. Supported. Of these, the jack stand 25 and the jack receiving stand 27 for the reference pipe 6a are:
As shown in FIGS. 8 to 10, three towing jacks 24 are attached to the gantry 25 and the supporting legs 29 are fixed to the retaining member 5. 27 has two mounting frames 30 that support the towing jack 24, and a supporting frame 31 to which the frames 30 are fixed is erected in the shaft 4.

The jack stand 26 and the jack receiving stand 28 for the standard pipes 6b, 6c... Are installed so as to be biased toward the end of the arrival position of the standard pipes 6b, 6c. Two or one tow jack 24 on the gantry 26
The supporting leg 32 is fixed to the retaining member 5, and the jack cradle 28 has two or one mounting frames 33 that support the towing jack 24, and the frame 33 is fixed. The support frame 34 is erected on the reaching shaft 4.

In the figure, reference numeral 35 denotes an excavation hole formed by excavating the burial position of the reference pipe 6a by a horizontal boring device (not shown). The excavation hole 35 communicates with the starting shaft 3 and the reaching shaft 4, and the traction member 22 is connected to the hole 35. It can be inserted. Reference numeral 36 denotes an abutment erected at the entrance of the underpass 7, and the buried pipe 6 of the side wall 7a is provided inside.
The main girder 37 is erected between the upper ends of the abutments 36, 36, and the subgrade 38 is provided between the lower ends of the abutments 36, 36.
And a pavement portion 39 is laid on the roadbed 38.

FIG. 14 to FIG. 19 show another embodiment of the present invention, and the same reference numerals are used for the portions corresponding to the configuration of the above-described embodiment. 14 to 18 show a second embodiment of the present invention. In this embodiment, instead of connecting one end of the traction member 22 to the blade port 19 and pulling the buried pipe 6, FIG.
Box-shaped reaction force covers 40 and 41 are detachably attached to the rear end of the pipe 6, and one end of a traction member 22 is connected to the covers 40 and 41 to pull the buried pipe 6. .

The reaction force cover 40 is mounted on the rear end of the reference tube 6a, as shown in FIG. 15, and is detachably fitted to the outside of the guide rails 11 and 12, and is attached to the inner surface of the intermediate portion. Hook 4 that can be engaged with the rear end of reference pipe 6a
2 are protruding. At the rear end of the reaction force cover 40, a mounting frame 43 is provided. The mounting frame 43 is arranged orthogonal to the axial direction of the reference pipe 6a, and a plurality of clampers 44 protrude outside the frame 43. . At a predetermined position of the mounting frame 43, one or more through holes (not shown) for drawing out the next traction member are formed.

The number of the clampers 44 is the same as the number of the towing jacks 24, and they are arranged coaxially with the jack 24, and connect one end of the towing member 22 to them.

The reaction force cover 40 is mounted on the starting shaft 3 side before the reference pipe 6a is pulled, and when the plurality of reference pipes 6a are sequentially pulled as shown in FIG. After removing the force cover 40 and connecting the next reference pipe 6a to the rear end of the pipe 6a, it is attached to the rear end of the reference pipe 6a.

In this case, the reaction force cover 40 is attached to the reference pipe 6a.
Since they are detachably fitted to the, they can be easily and quickly attached and detached. At this time, the holding action of the traction member 22 by each traction jack 24 is temporarily released, and the traction member 2
After extending the length 2 by the length of the connected reference pipe 6a and attaching the cover 40, each traction member 22 is fixed to the traction jack 24.

When the reference pipe 6a is towed, the auger screw 9 is driven to excavate the ground 1 and the towing jack 24 is operated to pull the towing member 22.
And pulls the reference tube 6a to which the cover 40 is attached from behind.

At this time, the same traction force is exerted on the mounting frame 43 by the respective traction members 22 in the same direction, that is, in the same direction as the traction member 22, and the frame 43 is disposed orthogonal to the traction direction. The resultant force acts on the center of the positions of the plurality of clampers 44, that is, the approximate center of gravity of the reference tube 6a, and promotes accurate towing of the tube 6a. Further, since the reference pipe 6a is pulled by the reaction force cover 40, the rigidity of the blade 19a and the rigid connection between the blade and the reference pipe 6a are required as compared with the conventional pulling method using the blade. Without these, they can be manufactured inexpensively.

On the other hand, the reaction force cover 41 is provided with the standard tubes 6b and 6c.
.. Are attached to the rear end portion, as shown in FIGS.
In the same manner as above, the standard pipe 6 is detachably fitted to the outside of the guide rails 13-18,
B, 6c.. At the rear end of the reaction force cover 41, an attachment frame 43 is provided, and the frame 43 is formed obliquely on the existing buried pipe target 6 side,
A clamper 44 protrudes outside the frame 43. In addition,
At a predetermined position of the mounting frame 43, one or more through holes (not shown) for drawing out the next traction member are formed.

The same number of the clamps 44 as the traction jacks 24 are provided, and they are arranged coaxially with the jacks 24, that is, arranged on one side of the mounting frame 43, to which one end of the traction member 22 is connected.

The reaction force cover 41 includes standard tubes 6b and 6c.
When the plurality of standard pipes 6b are towed sequentially as shown in FIG. 16 before the towing, the cover 41 is removed at the end of towing of the reference pipe 6a, and the rear end of the pipe 6b is attached. After connecting the next standard pipe 6b, it is attached to the rear end of the standard pipe 6b. In this case, since the reaction force cover 41 is detachably fitted to the standard pipe 6b, the attachment and detachment work thereof can be performed easily and quickly. At this time, the connection of the traction member 22 by each traction jack 24 is temporarily released, and the length of the traction member 22 is extended by the length of the connected standard pipe 6b.
After mounting 1, each traction member 22 is connected to a traction jack 24.

The standard tubes 6b, 6c...
Is performed in the same manner as At this time, the connection position of the traction member 22 is biased to one side of the mounting frame 43, and the frame 43 is formed obliquely to the existing buried pipe 6, the reference pipe 6a in FIG. 18 is biased to one side of the mounting frame 43 as shown in FIG.
Acts like a drawing, for example.

Of these, one component Pa is applied to the adjacent existing buried pipe 6, in the case of FIG. 18, the reference pipe 6a (the standard pipe 6c).
At the time of towing, the standard pipe 6b) acts on the standard pipe 6b).
c ... is pushed toward the existing buried pipe 6 and towed, so that the guide rails 12 to 18 are tightly engaged with each other, and
.. Are pulled accurately and smoothly along the reference numeral 18. Therefore, the closeness of the guide rails 12-18,
It is possible to reduce the consumption of the filling material described below for filling them.

FIG. 19 shows a third embodiment of the present invention. Instead of providing the first and second clampers 20 and 21 for connecting the traction members 22 and 23 outside the cutting edge 19, the clamper 20 is replaced with the cutting edge. 19, the traction resistance of the clamper 20 and the traction members 22 and 23 in the ground 1 is reduced.

FIG. 20 shows an application example of the present invention. Instead of supporting both ends of the jack bases 25, 26 with the support legs 29, 32, the bases 25, 26 are connected to the existing buried pipes 6a, 6a.
, 6c... are engaged with the supporting members of the jack reaction force, so that the structure of the support legs 29, 32 on one side is omitted, the structure is simplified, and the jack reaction force is reduced. The support is stabilized.

That is, in FIG. 20, when the standard pipe 6b reaches the reaching shaft 4, the end of the pipe 6b is engaged with the jack racks 25 and 26, while the ends of the racks 25 and 26 are moved downward in the drawing. To this jack and tow the jack 2
4 Install. Therefore, each time the buried pipe 6 is buried, the pedestals 25 and 26 are extended, and the ends of the buried pipe 6 which are already provided are engaged with the pedestals 25 to stably support the jack reaction force.

When the underpass 7 is installed immediately below the above-ground structure 2 by the method of burying underground building members configured as described above, the starting shaft 3 is placed at a predetermined position on both sides of the above-mentioned structure 2.
And the reaching shaft 4 are excavated, and the retaining member 5 is installed on those excavated surfaces.

Thereafter, a working table (not shown) for horizontal boring is erected on the reaching shaft 4, a horizontal boring device (not shown) is installed on the platform, and the starting shaft 3 is transferred from the reaching shaft 4 to the starting shaft 3 via the device. To that end, the reference pipe 6a is to be buried horizontally at the position where the reference pipe 6a is to be buried, and the traction member 22 is made to penetrate the borehole 35. In the embodiment, the center of the planned construction position of the floor plate portion 7b of the underpass 7 is horizontally drilled by the number of the traction members 22, that is, three boring holes, and these excavation holes 35 are set to the penetration positions of the first clamper 20 of the reference pipe 6a. Place in the same phase position.

Before and after the horizontal boring,
A jack stand 25 and a jack receiving stand 27 are installed in front of the arrival position of the reference pipe 6a of the arrival shaft 4, and a plurality of tow jacks 24 are attached to the stand 25, and one end of the penetrating torsion member 22 is passed through the jack 24. Connecting.

On the other hand, the reference pipe 6a is carried into the starting shaft 3,
The screw auger 9 is inserted into the auger tube 8 of the tube 6a and assembled, and a cutting edge 19a is attached to the tip of the reference tube 6a. Then, the other end of the traction member 22 is connected to the first clamper 20 in the same phase, and the front end of the next traction member 23 is connected to the blade 19a.
Is connected to the second clamper 21, the blade port 19a is directed to the penetrating position, and the reference pipe 6a is connected to the starting stand (not shown).
Transfer to the top.

Thereafter, the screw auger 9 is driven,
The ground 1 is excavated, the excavated earth and sand is discharged to the starting shaft 3 side, and the towing jack 24 is extended to operate the towing member 2.
2 is pulled in the direction of the reaching shaft 4, and the reference pipe 6a connected to the other end of the member 22 is pulled. In this way, the reference pipe 6a is guided by the traction member 22 and moves in the ground 1, and the next traction member 23 is pulled by the blade 19a and moves in the ground 1 integrally with the reference pipe 6a. I do.

In this case, the pulling member 22 pulls the reference pipe 6a along the excavation hole 35, and the resultant force of the pulling forces by the respective pulling members 22 acts on the approximate center of gravity of the reference pipe 6a. Accurate and stable towing,
Each next traction member 23 is stably towed along the peripheral surface of the reference pipe 6a or the guide rails 11 and 12. Moreover, since the reference pipe 6a is pulled from the arrival shaft 4 which is the construction standard, the accuracy of the movement position of the reference pipe 6a can be obtained as compared with the method in which the reference pipe 6a is propelled from the starting shaft 3 side. Construction accuracy is improved. If the length of the underpass 7 is long, the plurality of reference tubes 6a and the screw augers 9
And these are added sequentially on the starting shaft 3 side to respond.

When the reference pipe 6a has reached the reaching shaft 4 and the cutting port 19a has completely escaped to the reaching shaft 4, the operation of the towing jack 24 and the screw auger 9 is stopped and connected to the cutting port 19a. The traction member 22 is removed from the first clamper 20 and removed, and the next traction member 23 is removed from the second clamper 20 to maintain the state. Further, the blade 19a and the screw auger 9 are detached from the reference pipe 6a, the towing jack 24 is detached from the jack stand 25, and the jack stand 25 and the jack receiving stand 27 are removed.

The situation after removal is shown in FIG.
Both ends of the reference pipe 6a protrude into the starting shaft 3 and the reaching shaft 4, and the guide rails 11 and 12 integral with the pipe 6a also protrude from the shafts 3 and 4.
A next traction member 23 is laid along the outer periphery of the tube 12, and both ends protrude from both ends of the reference pipe 6 a.

Under such circumstances, the jack stand 26 and the jack receiving stand 28 are placed on one side of the arrival position of the standard pipe 6b of the arrival shaft 4, that is, at the boundary between the adjacent reference pipes 6a and 6b. 12 and 13, the same number as the next traction member 23 laid on the base 26 on the standard pipe 6b side, and in the embodiment, two traction jacks 24 are connected to the first clampers 20, 20 of the standard pipe 6b. At the same position, one end of the laid traction member 23 is connected to these.

In this case, the traction jack 24 is shown in FIGS.
3, as compared to the jack base 25 and the jack receiving base 27, which disperse and dispose them vertically and horizontally, as compared to the jack stand 25 and the jack receiving stand 27. Moreover, the installation space can be made compact.

On the other hand, the standard pipes 6b, 6c, 6
.. are carried in, the screw auger 9 is inserted into the auger tube 8 of the tube 6b and assembled, and the blade port 19b is attached to the tip of the standard tube 6b. Then, the other end of the laid traction member 23 (22) is connected to the first clamper 20 in the same phase, and the front end of the next traction member 23 is connected to the second end of the blade 19b.
When the standard pipe 6b is connected to the clamper 21 with the blade port 19b directed to the penetrating position, the standard pipe 6b is transferred onto a starting stand (not shown).

Thereafter, the screw auger 9 is driven,
The ground 1 is excavated, the excavated earth and sand is discharged to the starting shaft 3 side, and the towing jack 24 is extended to operate the towing member 2.
3 is pulled in the direction of the reaching shaft 4, and the standard pipe 6b connected to the other end of the member 23 is pulled through the blade 19b.

In this way, the standard pipe 6b is guided by the traction member 23 and moves in the ground 1 and, on the opposite side of the member 22, the next traction member 23 is pulled by the blade opening 19b and the ground 1
And moves integrally with the reference tube 6b. And the blade port 19b
Is completed, the guide rails 13 and 13 engage with the guide rails 12 and 12 of the reference pipe 6a, and thereafter the standard pipe 6b is pulled while maintaining the engagement relationship. In the case of a long underpass 7, a plurality of standard tubes 6b and screw augers 9 are used as shown in FIG.

In this case, since the standard pipe 6b is pulled at an eccentric position from its center of gravity, the movement of the standard pipe 6b is expected to be slightly unstable compared to the case where the standard pipe 6b is pulled at the center of gravity. Since the swing is regulated by the guide rails 12 and 13, there is no problem in construction. Rather,
By pulling as described above, the standard pipe 6b becomes the reference pipe 6a.
The buried pipes 6 are guided to the side to promote their close arrangement, so that the tightness of adjacent buried pipes 6 and the variation in their arrangement are suppressed, the buried pipes 6 are arranged in order, and the construction accuracy can be improved. , 13 can reduce the consumption of the filling members filling them.

When the standard pipe 6b has reached the reaching shaft 4 and the cutting port 19b has completely escaped to the reaching shaft 4, the operation of the towing jack 24 and the screw auger 9 is stopped and connected to the cutting port 19b. The traction member 23 is removed from the first clamper 20 and removed, and the next traction member 23 is removed from the second clamper 21 to maintain the state. Further, the blade 19b and the screw auger 9 are detached from the standard pipe 6, the towing jack 24 is detached from the jack stand 26, and the jack stand 26 and the jack receiving stand 28 are removed.

Therefore, after the removal, the standard pipe 6b
Of the pipe 6 project into the starting shaft 3 and the reaching shaft 4,
The guide rails 13 and 14 integral with b also protrude from the starting shaft 3 and the reaching shaft 4, and one next traction member 23 is laid between the guide rails 14 and 14, and both ends thereof are formed from both ends of the standard pipe 6b. Protrude. As described above, since the standard pipe 6b is pulled from the arrival shaft 4 which is the construction standard, the standard pipe 6b is propelled from the starting shaft 3 side.
The accuracy of the movement position of b can be obtained, and the construction accuracy is improved accordingly.

Under such circumstances, the jack stand 26 and the jack receiving stand 28 are placed at one side of the arrival position of the standard pipe 6c of the arrival shaft 4, that is, at the boundary between the adjacent standard pipes 6b and 6c. It is installed in the same manner as described above, and the same number of the traction members 23 laid on the gantry 26, in this embodiment, one traction jack 24 is attached at the same position as the first clamper 20 of the standard pipe 6c. One end of the member 23 is connected.

On the other hand, the screw auger 9 is inserted into the auger tube 8 of the standard tube 6c carried into the starting shaft 3, and assembled, and a blade port 19b is attached to the tip of the standard tube 6c.
Then, the other end of the laid traction member 23 is connected to the first
When connected to the clamper 20 and the front end of the laying traction member 23 is connected to the second clamper 21 of the blade port 19c, the blade port 19b is turned to the penetrating position, and the standard pipe 6c is placed on a starting stand (not shown). Transfer to

Thereafter, the screw auger 9 is driven,
The ground 1 is excavated, the excavated earth and sand is discharged to the starting shaft 3 side, and the towing jack 24 is extended to operate the towing member 2.
3 is pulled in the direction of the reaching shaft 4, and the standard pipe 6c connected to the other end of the member 23 is pulled through the blade 19c.

In this way, the standard pipe 6c is guided by the traction member 23 (22) and moves in the ground 1, and on the opposite side of the traction member 23, the next traction member 23 is pulled by the cutting edge 19c. Move in the ground 1 integrally with the standard pipe 6c. When the cutting edge 19c has penetrated the ground 1, the guide rails 15, 15 engage with the guide rails 14, 14 of the standard pipe 6b. I do.

In this case, the standard pipe 6c is connected to one traction member 2
3, the movement of which is expected to be slightly unstable compared to the two standard pipes 6b. However, the swing of the standard pipe 6c is restricted by the engagement of the guide rails 14, 15. Therefore, there is no problem in the construction, but rather, the installation work of the jack 24 and the traction member 2
3, the connection work is reduced, and the construction is simplified. The tightness of the buried pipe 6 by the eccentric traction method as described above, the arrangement of the buried pipe 6 and the improvement of the construction accuracy are the same as those of the standard pipe 6b.

As described above, according to the present invention, horizontal boring is performed only when the reference pipe 6a is pulled, and the standard pipes 6b, 6c, 6
Since the above-mentioned boring work is not required at the time of towing d, large and complicated horizontal boring work can be minimized, thereby reducing the work cost and shortening the construction period. In addition, since the traction member 23 of the subsequent buried pipe 6 is laid when the preceding buried pipe 6 is towed, a horizontal boring work for this is unnecessary, and this laying work can be performed rationally.

Thereafter, the standard pipes 6d are sequentially buried, and when the burial is completed, the buried pipes 6, 6 and the guide rail 1 are laid.
Fill mortar and waterproof material between 1-18. And a pair of left and right abutments 36,
After erecting the main girder 37 between the upper part,
The buried pipe 6 and the main girder 37 are connected to each other, and the buried pipe 6 and the abutment 36 are connected to each other by a PC steel wire. Thereafter, the ground 1 having an inner hollow section defined by the buried pipe 6 is excavated.
8 and the pavement 39 are constructed.

[0061]

Buried method of underground construction member of the present invention according to the present invention, as described above, can be a jack stand mounting the traction jack
Is installed on the side of the reaching shaft via multiple support legs, and
Has the reaction force of the jack been received on the side of the reaching shaft via the support legs?
Therefore, a stable reaction force can be obtained, and the reaction force
Existing underground construction like conventional construction method
There is no need to move members or keep them from falling off
Can be easily and rationally laid, and the construction accuracy can be improved. In addition, the plurality of support legs
Since it was installed on both sides of the traction member on a plane, the jack
The base can be stably supported, and the stability of the reaction force can be improved.
And towing jacks to improve towing accuracy and improve construction accuracy
The above and the construction can be performed smoothly or easily. Further, the present invention provides a jack for an underground construction member serving as a construction standard.
Place the support legs provided on the gantry on a plane
Installed on both sides of the lower construction member , towing jack stability
The underground construction members that can be
Improve the accuracy of pulling and the laying and construction accuracy
Can be . Furthermore, the present invention provides an underground construction member of construction standards.
The jack base for underground construction members to be constructed according to the standard
Side pit of reaching shaft between adjacent underground building members via supporting legs
And mounting the plurality of support legs on a plane, each underground construction member
Installed on the side edge of the
Power can be secured, and construction is performed based on the construction
That the construction accuracy of underground construction members can be improved
In addition, the jack space can be made more compact.
I can .

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an underpass constructed according to the present invention.

FIG. 2 is an enlarged front view showing a main part of FIG. 1 and shows an arrangement state of a buried pipe.

FIG. 3 is a front view showing a reference pipe among buried pipes applied to the present invention.

FIG. 4 is a front view showing a standard pipe disposed adjacent to a reference pipe among buried pipes applied to the present invention.

FIG. 5 is a front view showing a standard pipe disposed adjacent to the standard pipe of FIG. 4 among the buried pipes applied to the present invention.

FIG. 6 is a front view showing a standard pipe arranged adjacent to the standard pipe of FIG. 5 among the buried pipes applied to the present invention.

FIG. 7 is a cross-sectional view showing a state at the beginning of underpass construction according to the present invention.

FIG. 8 is a cross-sectional view showing a buried state of a reference pipe according to the present invention in a plan view.

FIG. 9 is an enlarged view of a main part of FIG. 8, showing an installation state of a towing jack.

FIG. 10 is a front view of FIG. 9, showing an installation state of the towing jack.

FIG. 11 is a cross-sectional plan view showing the embedding state of a standard pipe according to the present invention, showing the embedding state of a standard pipe adjacent to a reference pipe.

FIG. 12 is an enlarged view of a main part of FIG. 11, showing an installation state of the towing jack.

FIG. 13 is a front view of FIG. 12, showing the installation state of the towing jack.

FIG. 14 is a cross-sectional view showing a second embodiment of the present invention, and shows a buried state of a reference pipe in a plan view.

FIG. 15 is an enlarged sectional view taken along line AA of FIG. 14;

FIG. 16 is a cross-sectional plan view showing the embedding state of a standard pipe according to a second embodiment of the present invention, showing the embedding state of a standard pipe adjacent to a reference pipe.

FIG. 17 is a perspective view showing an example of a reaction force cover applied to the present invention, and shows a state where the reaction tube is mounted on a standard pipe of the second embodiment.

FIG. 18 is an enlarged view of a main part of FIG.

FIG. 19 is a front view showing a third embodiment of the present invention, which shows another aspect of the buried pipe.

FIG. 20 is a cross-sectional view showing an application example of the present invention, showing a erection state of a jack base and a mounting state of a tow jack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 3 Starting shaft 4 Arriving shaft 6, 6a, 6b, 6c Underground construction member (buried pipe) 19, 19a, 19b, 19c Blade opening 22 Traction member 23 Next-generation traction member 35 Drilling hole 40, 41 Reaction force cover 43 Mounting frame

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoyuki Matsuzawa 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company Inside (72) Inventor Toshio Hayashi 2--5 Misakicho, Chiyoda-ku, Tokyo No. 3 Iron Building Construction Co., Ltd. (72) Inventor Masaharu Saito 2-3-5 Misakicho, Chiyoda-ku, Tokyo Inside Steel Construction Construction Co., Ltd. (72) Inventor Yoshitaka Komuro Chiyoda, Tokyo 2-53-3, Misaki-cho, Ward Iron Construction Construction Co., Ltd. (56) References JP-A-1-278689 (JP, A) JP-A-2-30886 (JP, A) JP-A-4-222797 ( JP, A) JP-A-53-111612 (JP, A) JP-B-50-34851 (JP, B2) JP-B-51-22731 (JP, B2) JP-B-46-40381 (JP, B1) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) E21D 9/04

Claims (3)

(57) [Claims] 1. An underground construction section in which an excavator is housed.
A blade is detachably attached to the tip of the material, and a traction member is attached to the blade.
And the next traction member, and connect the traction member with a traction jack
To the arriving shaft via
Towing from the shaft to the reaching shaft,
In the method of burying an underground construction member in which the material is laid at the towing position of the next underground construction member ,
An attachable jack base is reached via multiple support legs
Installed on the side of the shaft, and the plurality of support legs are
A method for burying underground construction members, which is installed on both sides of a traction member . 2. An underground construction member, which is a construction standard,
A plurality of support legs provided on the gantry
The method of burying underground construction members according to claim 1, wherein the underground construction members are installed on both sides of the underground construction members. 3. An underground construction member according to the construction standard.
The jack base of the underground construction member to be constructed is
Installed on the side of reaching shaft between adjacent underground construction members
Then, the plurality of support legs are placed on a plane,
The method of burying underground construction members according to claim 1, wherein the underground construction members are installed on the side of the section.