JP2860750B2 - Underground structure propulsion guide member and underground structure embedding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion guide member for guiding an underground structure such as a passage under the ground when the underground structure is constructed, and an underground structure using the propulsion guide member. This is related to the method of burial.

[0002]

2. Description of the Related Art Conventionally, for example, in order to build an underground structure for forming a passage or the like in a direction crossing the track in the ground under the track, it is necessary to form an existing structure on one side of the track. An underground structure is provided, and the underground structure is propelled and buried underground by a jack-based propulsion device. In this case, since a large reaction force acts on the propulsion device when propelling the underground structure, it is desirable to reduce the propulsion reaction force as much as possible. In addition, the underground structure is propelled while sliding on the smooth surface on the upper surface of the guide member.

[0003]

However, when the guide member is made of I-section steel, the guide member is excavated and the guide member is buried in the bottom surface of the shaft, so that the guide member is laid. Not only requires a great deal of trouble, but also causes a problem in that the ground becomes loose and the work is dangerous.
Also, a square pipe is used as a guide member, and this square pipe is propelled and buried underground. In this case, however, it is difficult to bury the guide member with high accuracy, and a large number of square pipes are used. When buried in parallel, a height difference occurs,
It will also affect the construction accuracy of underground structures.

Further, when a sliding member is provided on the upper surface of the guide member, when the guide member is buried in the ground, the sliding member may be damaged by sliding contact with the ground, and the effect may be reduced. In addition to the above, when underground structures are laid and buried on top of this, the earth and sand penetrate between the undersurface of the underground structures and the lubricating material surface to increase propulsion resistance, and smooth burial Is no longer possible.

Further, since the propulsion reaction force of the underground structure is received by the reaction force support wall, it takes time to construct the underground structure, and the wall is required to receive a large reaction force. There is a problem that the scale becomes large, the work space is narrowed, and the efficiency is reduced. An object of the present invention is to provide a propulsion guide member for an underground structure capable of completely solving such a problem and a method for burying an underground structure using the guide member.

[0006]

In order to achieve the above object, a propulsion guide for an underground structure according to the present invention is used for propelling and burying a structure underground. A guide member for sliding the structure on the upper surface, wherein a sliding member whose height is adjustable in the vertical direction is disposed over the entire length of the upper surface of the square pipe, and the sliding member is covered with a cover. have.

In the method of embedding an underground structure using the guide member, the guide member may be provided at a position for supporting the lower surface of the structure propelled and buried underground. After the height of the sliding material is adjusted, a curing agent is filled between the lower surface of the sliding material and the upper surface of the guide member, and then hardened. Thereafter, the underground structure is covered with the propulsion device at the front end surface of the cover. Is buried in the ground by sliding on a sliding material while extruding or removing it forward.

In the above method, before the hardener is filled between the lower surface of the sliding member and the upper surface of the guide member, the bag previously housed in the cover is press-fitted with a fluid. It is desirable to fill the curing agent between the lower part of the sliding material and the upper surface of the guide member in a state where the curing agent is expanded to prevent the curing agent from being filled upward from the sliding material. As described above, it is preferable that the rear end of the guide member is integrally connected to the propulsion device so that the propulsion reaction force is received by the guide member.

[0009]

[Function] Since the guide member is made of a square pipe, it is propelled into the ground while excavating the ground in front of it when burying it.
Can be buried. In addition, since the sliding material whose height can be adjusted in the vertical direction is arranged on the upper surface of the square pipe over the entire length, the height of the sliding material is adjusted from within the square pipe after embedding, so that the height error can be reduced. Can be eliminated. In addition, since the lubricating material is covered by the cover at the time of embedding, it can be prevented from being damaged by sliding contact with the ground.

After the guide member is embedded and the height of the sliding member is adjusted, a hardening agent is filled between the lower surface of the sliding member and the upper surface of the guide member and hardened, so that the sliding member is firmly integrated with the guide member. Then, the underground structure is slid on the sliding material by pushing or removing the cover forward from the front end face of the underground structure by the propulsion device, so that the underground structure, the lower surface, and the sliding material The underground structure can be buried smoothly in the ground while preventing intrusion of earth and sand therebetween.

Furthermore, by integrally connecting the rear end of the guide member to the propulsion device, the guide member can firmly receive a reaction force when the underground structure is propelled. Not only is there no need for a wall or a pile for supplementarily receiving the force, but also the guide member can be small.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings in which an underground structure is constructed in a direction perpendicular to a track underneath. Referring to FIG. The ground on both sides of the track 1 at the place is excavated to an appropriate depth to form a starting shaft 2 and a reaching shaft 3. The reaching shaft 3 is not always necessary when there is a space in which a pipe roof described later can be removed. In addition, if there is a space where the underground structure can be propelled and buried in the underground structure in a predetermined direction on the starting shaft 2 side, it is not necessary to excavate the underground structure.

Next, a steel square pipe having an internal dimension of 800 to 1500 mm is located at a position for receiving the lower surface of the underground structure 4 (shown in FIGS. 2 and 3) from the starting shaft 2 to the reaching shaft 3. A guide member 5 mainly composed of 5a is buried, and both ends of the guide member 5 are
3 is buried so as to protrude from the bottom. The guide member 5 is buried by inserting an excavator (not shown) such as a screw auger into the inside of the guide member 5 to excavate the ground in front or manually dug the ground, and press the rear end with a jack or the like. .

The guide member 5 is, as shown in FIGS.
A square pipe 5a, a sliding member 6 disposed in the center of the upper surface of the square pipe 5a in the length direction, a height adjusting screw 7 of the sliding member 6, and a cover 8 are provided. Long slits 5b extending in the length direction penetrate and are formed at small intervals in the center of the upper wall plate, and locking pieces are provided on the upper surface on both sides of these slits 5b.
5c, 5c are protruded at appropriate intervals in the longitudinal direction, and are provided in the upper wall plate portion between the slit 5b and the locking pieces 5c, 5c so as to penetrate the screw holes 5d in and out.

The lubricating member 6 has a strip-shaped lubricating layer 6b having a small frictional resistance and self-lubricating property such as Teflon resin on the upper surface of a flange portion of a supporting member 6a made of a steel member having a T-shaped cross section with a certain length. The web portion 6c is inserted through the slit 5b of the square pipe 5a so as to be vertically movable and the height adjusting screw 7 is screwed into the screw hole 5d from inside the square pipe 5a. The lower surface of the flange portion of the support member 6a is received at the upper end surface. The sliding member 6 is provided in each of the slits 5b, and the flange portions of the support members 6a adjacent to each other in the front and rear are integrated by welding or the like, so that the sliding layer 6b is continuously flush over the entire length of the square pipe 5a.

On the other hand, the cover 8 is made of a channel steel having the same length as the guide member 5, and the lower end inner surfaces of both side plates 8a, 8a are slidable on the above-mentioned locking pieces 5c, 5c of the square pipe 5a. To cover the lubricating material 6. The cover 8 is welded only at the front end to the front end of the square pipe 5a.
5a is buried integrally with it, and after burial, the weld is removed so that it can be moved in the length direction with respect to the square pipe 5a. It is configured so that it is closed so that it does not enter and that the blockage is released after embedding. As shown in FIG. 7, it is desirable to dispose long bags 9 in the upper space on both sides in the cover 8.

According to the size of the underground structure 4, a plurality of the guide members 5 are provided at positions for receiving the bottom surface of the underground structure 4.
It is buried in a side-by-side state. In FIG.
A guide member row is provided at the center of the lower surface of the structure 4 and at both sides of the lower surface. After the guide members 5 are buried, the worker enters the square pipe 5a and advances and retreats the adjusting screw 7 so that the sliding layers 6b of the sliding members 6 of all the guide members are adjusted to be on the same plane. I do. At the time of this adjustment work, the degree of parallelism of the respective sliding members 6 can be determined by directly viewing the inside of the cover 8 from the starting shaft 2 side.

After the height adjustment of the sliding material 6 after the embedding is completed, the mortar 10 is injected and filled from the inside of the square pipe 5a into the gap between the square pipe 5a and the sliding material 6 as shown in FIG. Then, the square pipe 5a and the lubricating material 6 are integrated. At this time, air or water is press-fitted into the bag body 9 to
By this, the floating of the sliding material 6 and the cover 8 are prevented from being integrated with the square pipe 5a and the sliding material 6, and the mortar 10 is prevented from being filled upward from the sliding layer 6b. After the mortar 10 is filled, the concrete 11 is filled in all the square pipes 5a of the guide member 5 to increase the strength.

After the guide member rows are buried, the bottom of the starting shaft 2 is back-filled to a depth reaching the rear end of the guide member 5, and the sliding layer 6 b and the upper surface of the sliding material 6 of each guide member 5 are placed thereon. Steel pipes are laid out so as to be flush with each other, and the front end of the steel pipe is integrally fixed to the rear end of the corresponding guide member 5 by welding or the like, and concrete is inserted into the gap between the juxtaposed steel pipes. Is mounted so as to be flush with the upper surface of the steel pipe to form the gantry 13. It should be noted that an H-section steel or an I-section steel may be used instead of the steel pipe.

On the other hand, a pipe roof 14 composed of a row of square pipes made of steel is buried at the height position of the upper floor 4a of the underground structure 4 to be buried between the shafts 2 and 3, that is, at the position where the upper floor is to be buried. The embedding of the pipe roof 14 is also formed by sequentially propelling and embedding while excavating the ground in front of each steel square pipe by the same operation as the above-described embedding of the guide member 5. Each pipe 14a constituting the pipe roof 14
As shown in FIG. 8, the front end is formed at the cutting edge 14b, and the edge cutting plate 15 made of a strip-shaped steel plate is buried on the upper surface thereof. At the time of embedding, the front end of the edge cutting plate 15 is fixed to the tip of the square pipe by welding or the like, and after embedding, the fixed portion is removed to enable relative movement with respect to the upper surface of the pipe roof 14. The rear end of the edge cutting plate 15 is fixed in place on the starting shaft 2 side.

As described above, the pipe roof 14 and the guide member 5 are buried horizontally above and below the ground below the track 1 between the shafts 2 and 3, and the guide member 5 is integrated with the guide shaft 5 at the bottom of the starting shaft 2. After the gantry 13 is provided, a propulsion device 16 is installed on the rear end of the gantry 13 as shown in FIG. 3, and the gantry 13 and the propulsion device 15 are integrally connected and fixed 17. The propulsion device 16 is composed of a propulsion jack 16a and a reaction force receiving member 16b, and the reaction force receiving member 16b is integrally fixed to the upper surface of the gantry 13 by welding its lower surface or fixing means such as a bolt and nut. , The propulsion jack 16a
b, a plurality of them are arranged side by side on the front side, and their rear end faces are connected to the front surface of the reaction force receiving member 16b in a state of being abutted and supported.
If necessary, a steel plate is built in contact with the rear wall surface and both side surfaces of the starting shaft 2, and the lower end of the steel plate is integrally connected to the gantry 13, and the reaction force receiving member 16b is attached to the front surface of the steel plate. The rear surface may be received.

Thus, the propulsion device 16 is placed on the rear end of the gantry 13.
After fixing the underground structure 4 having a rectangular frontal shape on the gantry 13 in the starting shaft 2, the propulsion jack 16 of the propulsion device 16 is mounted.
The piston rod of a is extended and the lower floor of underground structure 4
By pressing the rear end face of 4b, the underground structure 4 is propelled and buried under the ground while sliding the lower surface of the lower floor portion on the guide member 5 toward the reaching shaft 3. It is preferable that a sliding member 4c having a low frictional resistance such as an iron plate or a Teflon resin is integrally layered on at least the lower surface of the lower floor portion 4b of the underground structure 4 as shown in FIG.

When the length of the underground structure to be built is long, the underground structure 4 is propelled and buried while connecting the underground structures 4 sequentially. A cutting edge 17 is attached to the front end of the middle structure 4 along the opening edge, the front ground is cut, sediment is taken into the underground structure 4, and excavated sediment is discharged to the starting shaft 2 side. Promote and bury. As the underground structure 4 is propelled, the pipe roof 14 is pushed out toward the reaching shaft 3 at the front end face of the upper floor portion 4a, and the upper surface of the upper floor portion 4a is moved along the lower surface of the edge cutting plate 15 left in the ground. The underground structure 4 is propelled. The pipe roof 14 extruded toward the reaching shaft 3 is divided and removed.

On the other hand, the lower floor portion 4b of the underground structure 4 slides on the sliding layer 6a of the sliding member 6 of the guide member 5.
Is pushed forward on the front end face of the lower floor portion 4b so as to protrude toward the reaching shaft 3, and the protruding portion is cut and removed. Since the underground structure 4 slides on the sliding material 6 exposed by pushing the cover 8 in this way, it is possible to reliably prevent earth and sand from digging into the lower surface of the underground structure 4 and to reduce the frictional resistance. Thus, the underground structure 4 can be buried under propulsion. The cover 8 may be cut and removed at the cutting edge 17 together with the excavation.

When the underground structure 4 is propelled, the reaction force of the propulsion acts as a pressing force for retreating the propulsion device 16, and the reaction force receiving member 16 b of the propulsion device 12 is integrated with the gantry 13. The base 13 is integrally connected to the guide member 5 as well, and the reaction force is transmitted from the propulsion device 16 to the guide member 5 via the base 13 and received by the guide member 5. Is stopped. At this time, since the guide member 5 is buried in the ground and the load of the underground structure 4 is applied on the guide member 5, the guide member 5 receives the reaction force without moving at all. Underground structure 4 while stopping
Can be smoothly promoted. Further, the underground structure 4 is prevented from being propelled in the downward inclined direction by the guide member 5, and is buried accurately in the horizontal direction.

When the first underground structure 4 is propelled and buried in the ground in this way, the front end surface of the next undersized structure 4 of the same size and the same shape is joined to the rear end surface, and the propulsion jack of the propulsion device 16 is connected.
Buried by 16a. At this time, the propulsion reaction force applied to the propulsion device 16 is received by the guide member 5 as described above. Hereinafter, the underground structures 4 are sequentially connected in the same manner, while being propelled and buried toward the arrival shaft 3 side,
The construction of a long underground structure in between.

[0027]

As described above, according to the underground structure propulsion guide of the present invention, a sliding member whose height can be adjusted in the vertical direction is disposed over the entire length of the upper surface of the square pipe and this sliding member is provided. Since the cover is covered with a cover, the square pipe can be laid by a propulsion method while excavating the ground in front of the square pipe without providing a shaft, and at the time of burying the square pipe, the sliding material slides on the ground by the cover. Damage can be prevented, and, furthermore, by adjusting the height of the sliding material from inside the square pipe after embedding this square pipe, the height position and level of the sliding material due to the height error of the square pipe at the time of embedding The degree can be adjusted accurately, and therefore, the underground structure can be accurately buried at the planned burial position.

According to the method of embedding an underground structure of the present invention, after the guide member is embedded and the height of the sliding material is adjusted, a curing agent is filled between the lower surface of the sliding material and the upper surface of the guide member. , And hardens, the sliding material is firmly integrated with the guide member and can sufficiently withstand the load of the underground structure that slides on the sliding material. Since the cover covering the sliding material at the front end surface of the object is pushed forward or removed at the cutting edge, the underground structure is prevented from entering the sand between the undersurface structure and the lower surface and the sliding material. The structure can be smoothly propelled and buried underground.

Further, by integrally connecting the rear end of the guide member to the propulsion device, the guide member can firmly receive the reaction force when the underground structure is propelled. Not only is there no need for a wall or a pile for supplementarily receiving the force, but also the guide member can be small.

[Brief description of the drawings]

FIG. 1 is a simplified longitudinal side view of a state in which a guide member and a pipe roof are buried between both shafts.

FIG. 2 is a simplified longitudinal front view thereof,

FIG. 3 is a simplified longitudinal side view of a state in which a large box is propelled and buried,

FIG. 4 is a longitudinal front view of a guide member,

FIG. 5 is a partial longitudinal side view thereof,

FIG. 6 is a partial plan view of a square pipe,

FIG. 7 is a partially enlarged longitudinal sectional front view of a square pipe provided with a bag in a cover,

FIG. 8 is a vertical side view of a front end of a pipe constituting the pipe roof,

FIG. 9 is a sectional view of a lower floor portion of a large box.

[Explanation of symbols]

 Reference Signs List 1 track 2, 3 shaft 4 underground structure 5 guide member 5a square pipe 6 lubricating material 8 cover 9 bag body 10 mortar 16 propulsion device

Claims (4)

(57) [Claims] 1. A guide member for sliding a structure on an upper surface when the structure is propelled and buried underground, and a sliding member having a height adjustable in a vertical direction is provided on an upper surface of a square pipe along an entire length. A propulsion guide member for an underground structure, wherein the propulsion guide member is provided so as to cover the sliding member with a cover. 2. A guide member which is provided at a position for supporting a lower surface of a structure which is propelled and buried underground and which has a height adjustable on its upper surface and which is covered with a cover. After embedding and adjusting the height of the sliding material, a hardener is filled between the lower surface of the sliding material and the upper surface of the guide member, and then hardened, and then the underground structure is propelled by the propulsion device to cover the cover at its front end surface. A method of burying an underground structure, wherein the underground structure is buried in the ground by sliding on a sliding material while being pushed forward or removed. 3. Before filling the hardening agent between the lower surface of the lubricating material and the upper surface of the guide member, the bag body previously housed in the cover is inflated by press-in of a fluid, and the hardening agent rises above the lubricating material. 3. The method of burying an underground structure according to claim 2, wherein a hardening agent is filled between a lower portion of the sliding material and an upper surface of the guide member in a state where the hardening agent is prevented from being filled. 4. The method of burying an underground structure according to claim 2, wherein a rear end of the guide member is integrally connected to the propulsion device, and the propulsion reaction force is received by the guide member.