JP2835416B2 - Underground structure and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground structure constructed underground such as under a railway line or under a road and a method of constructing the underground structure.

[0002]

2. Description of the Related Art Conventionally, for example, underground under a railway line,
In order to construct an underground structure for forming a passage or the like in a direction crossing the railway line, shafts B and C were excavated on both sides of the railway line A as shown in FIGS. Thereafter, a number of steel square pipes E each having a flat friction cut member D disposed on the surface side in contact with the ground correspond to the cross-sectional position of the planned underground structure in the ground between both shafts B and C. Press into the upper half of the part in parallel with each other.

[0003] Then, on the rear end face of these pipes E group,
After the upper half of the front end surface of the underground structure F having the excavating blade H attached to the front end side, and the rear end of each of the friction cut members D is fixed to one of the shafts B, the underground structure F By pushing the rear end of the pipe E with the jack G or by pulling it with an appropriate towing means, the drilling blade H excavates the ground in front, guides the friction cut member D to propel the underground structure F, and pipes E It is built by replacing with a group.

[0004]

However, in such a method of constructing an underground structure, since the entire underground structure is propelled while excavating the ground and simultaneously pushing the group of pipes E, the underground structure is The larger the cross section becomes, the longer it becomes, the larger the propulsion or traction force is required, so that not only the equipment cost rises, but also the work efficiency decreases.

The present invention has been made in view of such problems, and has a structure in which even a large-sized underground structure can be efficiently buried in the ground with relatively small propulsion or traction. The purpose of the present invention is to provide an underground structure and a method for constructing the underground structure.

[0006]

In order to achieve the above object, an underground structure according to the present invention is an underground structure formed by combining and joining structural members at least vertically or horizontally. Enclosing wall members that oppose each other and form a hollow portion are integrally attached to the joining end surfaces of the structural members over the entire length, and concrete is cast between the communicating hollow portions of these enclosing wall members. It has a structure in which structural members are integrated with each other.

Further, as a method of constructing such an underground structure, a pipe body is buried in a cross-sectional position of a planned underground structure underground, and then the underground structure is divided at least vertically or horizontally. A front end face of a divided structural member having a shape and having an enclosing wall member integrally attached to the divided end face thereof over its entire length abuts on a rear end face of the juxtaposed pipe body, and these structural members are juxtaposed. It is characterized in that it is buried in the ground by replacing it with a pipe body, and thereafter, concrete is cast in a hollow portion communicating with these surrounding wall members to integrate the structural members with each other.

[0008]

[Function] Since the underground structure is made up of at least vertically or horizontally divided structural members, not only is it easy to handle such as production and transportation, but also the divided end faces of these structural members are hollow. Are integrally mounted over the entire length, so that each of the structural members can be independently moved in the length direction by using the surrounding wall members slidingly in contact with each other as guides.

Therefore, after the pipes are buried side by side at the cross-sectional position of the planned underground structure underground, the front end face of the underground structure formed by combining the structural members on the rear end face of the side-by-side pipe body is arranged. When each of the structural members is sequentially and individually propelled from this state, only the pipe body group on the front end face side of the propelled structural member is pushed forward, and the structural member also adjoins the surrounding wall member. It can be buried in the ground with a relatively small propulsion force while being in sliding contact with the surrounding wall member of the structural member.

In this way, by substituting the corresponding structural members while sequentially propelling the structural members, the underground structure composed of these divided structural members is buried underground. Thereafter, if there is an opposing wall portion in the enclosing wall member of the adjacent structural member that is in close contact with each other, the opposing wall portion is removed to communicate the interior of these enclosing wall members, and a concrete is provided between the interiors. The underground structure is completed by casting and integrating structural members. At this time, the above-described work of integrating the surrounding wall members can be performed by using the hollow interior of the surrounding wall member as a working space.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 shows a method of constructing an underground structure having a rectangular cross section, and FIG.
In FIG. 2, the underground structure is composed of an upper underground structure member 1 and a lower underground structure member 2, and the upper underground structure member 1 is a top wall portion. The lower underground structural member 2 is formed in an inverted U-shape in which upper side walls 1b and 1b are integrally provided downward on both side ends of the lower wall 1a. U having lower side walls 2b, 2b integrally provided on both side ends upward.
It is formed in the shape of a letter.

Further, these upper and lower underground structural members 1,
2 opposing joint end surfaces, ie, upper side walls 1b, 1b and lower side wall 2
As shown in FIGS. 5 and 6, hollow enclosing wall members 3 and 4 are respectively fixed to the end faces facing b and 2b in advance over the entire length, and as described later when constructing an underground structure, After burying the upper and lower underground structural members 1 and 2 to a predetermined position in the ground while sliding the opposing wall plate portions 3a and 4a of the surrounding wall members 3 and 4 together, the opposing wall plate portions 3a and 4a are removed. By cutting and placing concrete 5 between the communicating upper and lower surrounding wall members 3 and 4, the upper and lower underground structural members 1 and 2 are integrated,
It is building an underground structure.

Next, a method of constructing an underground structure by embedding the upper and lower underground structure members 1 and 2 having the above-described structure in the ground under the railway track A or the like will be described. First, the shafts B and C are excavated with a length interval at which an underground structure is to be constructed, and then a number of steel square pipe bodies 6 are connected to the shafts B and C.
Horizontally press in parallel with each other at the cross-sectional position of the planned underground structure in the ground. The width of the pipe body 6 is formed to be substantially equal to the wall thickness of the underground structure, and the length is formed to have a fixed length obtained by dividing the length of the underground structure to be constructed when the underground structure to be built is long. Further, as shown in Figs.
U-shaped engaging ridges 12 and 13 are provided. A friction cut member 7 made of a strip-shaped steel plate is placed on at least a surface on which the ground is not allowed to move on a surface in contact with the ground.

The press-fitting of the pipe body 6 from one shaft B to the other shaft C is performed while excavating the ground by inserting an auger (not shown) therein. After the press-fitting of the pipe body 6, the pipe body 6 is connected to the pipe body 6, and the next pipe body 6 is press-fitted. By repeating this, the pipe body 6 connected straight between the shafts B and C is buried. At this time, when the friction cut member 7 is provided on the pipe body 6, only the friction cut member 7 of the pipe body 6 to be first press-fitted is integrally joined to the front end of the pipe body 6 by welding or the like. The pipe body 6 to be press-fitted afterwards is integrally connected by welding or the like between the opposing end faces of the friction cut members 7, 7 which are adjacent in the front and rear.

Further, the pipes 6 are sequentially press-fitted and buried in the same manner as described above while engaging the engaging ridges 12 and 13 adjacent to the pipe 6 already buried, and this operation is repeated, and FIG. As shown, the top wall portion of the upper underground structure member 1
An upper pipe row 61 having substantially the same width as that of the upper pipe row 1 (a friction cut member 7 is provided on the upper surface thereof to prevent movement of the upper ground) is formed, and both end pipe bodies 6 of the upper pipe row 61 are formed. , 6 is buried below the pipe body 6 in contact with the lower surface of the upper underground structure member 1 so that the upper wall 1
b, forming two upper half pipe rows 62, 62 equal to the height of 1b. A sliding pipe body 6a having an outer shape substantially equal to the cross-sectional shape of the enclosing wall members 3, 4 is press-fitted and embedded in the lower surfaces of the upper half pipe rows 62, 62 on both sides.

Similarly, a pipe 6b having the same shape as the pipe 6a is brought into contact with the lower surface of the sliding pipe 6a.
Are buried, and a plurality of pipe bodies 6 are press-fitted and buried in the lower surface thereof in parallel in the longitudinal direction to form lower half pipe rows 63, 63 on both sides. A plurality of pipe bodies 6 are press-fitted and buried between the lower ends of the upper and lower pipe rows 61 so as to form a lower pipe row 64 having the same width as the upper pipe row 61. As the pipe body 6 forming the lower pipe row 64, a pipe body provided with a friction cut member 7 on its upper surface is used.

After forming a group of pipes having substantially the same cross-sectional shape as the planned underground structure between the shafts B and C,
The upper and lower underground structure members 1 and 2 are placed in one shaft B as shown in FIG.
As shown in (1), they are arranged with the opposing surfaces of the surrounding wall members 3, 4 on both sides being in sliding contact with each other. As shown in FIG. 6, the enclosing wall members 3, 4 are formed by bending a steel plate into a square pipe shape to have substantially the same cross-sectional shape as the pipe bodies 6a, 6b. Both sides of the side wall 1b and the lower side wall 2b are fixed to the ends of the side walls 1b and the lower side wall 2b, respectively.

Since it is difficult to integrally provide the surrounding wall members 3 and 4 when manufacturing the upper and lower underground structure members 1 and 2, these underground structure members 1 and 2 are difficult to manufacture.
At the time of manufacture, the steel plate pieces 3c, 4c are buried at the lower end of both sides of the upper side wall 1b and the lower side wall 2b, and after the manufacture, the upper side wall 1b
The bent inner ends of the side walls 3b, 4b of the surrounding members 3, 4 are connected to these steel plate pieces 3c, 4c protruding from the lower part 2b of the side wall. Reinforcing bars 8 protrude into the enclosing wall members 3 and 4 at the opposing end surfaces of the upper and lower underground structural members 1 and 2 with the upper side wall 1b and the lower side wall 2b.

The upper and lower underground structural members 1 and 2 are combined in a stacked state as described above, and the front end surfaces of the upper and lower underground structural members 1 and 2 are respectively attached to the upper and lower rear end surfaces of a pipe row embedded in the ground. It is in the state of being in contact. That is, the front end face of the top wall 1a of the upper underground structure member 1 is the rear end face of the upper pipe row 61, and the front end faces of the upper side walls 1b, 1b and the surrounding wall members 3, 3 are both upper half pipe rows 62, 62 and the rear end face of the sliding pipe body 6a, respectively. Similarly, the floor wall 2a, the lower side walls 2b, 2b, and the surrounding wall member 4 of the lower underground structural member 2 are respectively connected to the lower half pipe row 63 on both sides. 63, the lower pipe row 64, and the rear end face of the sliding pipe body 6b are respectively brought into contact with each other.

In this state, a plurality of jacks 10, 11 (shown in FIG. 1) interposed between the reaction force supporting member 9 and the rear end surfaces of the upper and lower underground structural members 1, 2 installed in the shaft B are installed. By extending, these upper and lower underground structures 1 and 2 are pressed into the ground while following the trace of six rows of pipes pushed out to one shaft C side via the upper and lower underground structure members 1 and 2. To go. At this time, the front end of the friction cutting member 7 provided on the pipe body 6 is cut off from the foremost end of the pipe body 6 and the rear end is fixed to an appropriate position of the shaft B, and the friction cutting member 7 is placed underground. The pipe body 6 is pushed out smoothly by using the friction cut member 7 as a guide while leaving the ground to prevent the ground from moving.

The propulsion of the upper and lower underground structure members 1 and 2 by the jacks 10 and 11 is not performed simultaneously. First, one of the underground structure members 1 is pushed forward by a plurality of jacks 10 by a desired length. The other underground structural member 2 is similarly pushed forward by a plurality of jacks 11 by a desired length, and is repeatedly buried in the ground.

Therefore, when the upper underground structure member 1 is propelled, the surrounding wall member 4 of the stopped lower underground structure member 2
Of the upper underground structure member 1 on the upper wall plate portion 4a
The lower wall plate portion 3a slides, and the upper pipe row 61, both upper half pipe rows 62, 62 and the sliding pipe body 6a are pushed out to the other shaft according to the propulsion length thereof, and When the underground structure member 2 is propelled, the lower underground structure member 2 advances along the lower surface of the surrounding wall member 3 of the stopped upper underground structure member 1 to move the lower half pipe rows 63, 63 on both sides. The row 64 and the sliding pipe body 6b are pushed out to the other shaft according to the propulsion length. The extruded pipe body is removed. When the total length of the underground structure formed by the upper and lower underground structure members 1 and 2 is long, the upper and lower underground structure members 1 and 2 formed by dividing the underground structure in the length direction are successively arranged. It may be buried.

When all the pipes 6 are pushed out to the other shaft side C in this way and the replacement with the upper and lower underground structures 1 and 2 is completed, the surrounding wall members 3 and 4 of the upper and lower underground structure members 1 and 2 are completed.
7 and 8, the opposing wall plate portions 3a and 4a are cut off to allow communication between the surrounding wall members 3 and 4 so that both sides of the surrounding wall members 3 and 4 are connected to each other. The walls are connected by a steel plate 12 and the inner formwork 13 is attached between the lower ends of the inner surfaces of the upper and lower side walls 1b and 2b. Further, the reinforcing bars 8 and 8 project from the facing end surfaces of the upper and lower side walls 1b and 2b. As shown in FIG. 9, after arranging reinforcing bars 14 and the like, concrete 5 is poured into and enclosed in the surrounding wall members 3, 4, and the upper and lower side walls 1b, 2b of the upper and lower underground structural members 1, 2 are filled. Are integrated.

As described above, the upper and lower underground structural members 1, 2
And then constructing an underground structure, excavating and removing earth and sand in the underground structure to form a passage. In the above embodiment, the underground structure is constituted by the underground structure members 1 and 2 which are vertically divided. However, the underground structure may be divided right and left. Then, the surrounding wall members may be attached to the divided end surfaces in a state of sliding contact with each other, and each divided portion may be sequentially and independently propelled in the same manner as described above. Further, the underground structure members 1 and 2 may be propelled by towing the underground structure members 1 and 2 by appropriate towing means, without being limited to pushing by the jack.

FIGS. 12 and 13 show another embodiment of the present invention. In the above embodiment, the facing wall plate portions 3a and 4a are used as the surrounding wall members 3 and 4 of the upper and lower underground structural members 1 and 2, respectively. However, in this embodiment, the end portions of the upper and lower underground structural members 1 and 2 are not provided as the surrounding wall members 3A and 4A. Side wall plates 3b, 3b and 4 fixed to the ends of the portions 1b and 2b
b, 4b. The end of one side wall plate 3b is slidably engaged with a horizontal step portion 4d formed on the upper side of the other side wall plate 4b so that the propulsion can be performed without displacement.

According to the surrounding wall members 3A and 4A configured as described above, since they communicate with each other, the upper and lower underground structures 1, 2
After the embedding, the work for cutting off the opposing wall plate portions 3a and 4a as described above can be unnecessary, and the working space can be widened. Accordingly, as shown in FIG. 12, the pipe body 6 having the same cross-sectional shape can be used as the sliding pipe bodies 6a and 6b to be replaced with the surrounding wall members 3A and 4A.

[0027]

As described above, according to the present invention, since the underground structure is formed of at least a plurality of underground structure members divided vertically or horizontally, the production and handling of each underground structure member is possible. Not only becomes easier, but the underground structure is constructed by burying a pipe body in a cross-sectional position of an underground planned underground structure in a side-by-side state, and then combining the divided underground structure member with the rear end face of the side-by-side pipe body In a state where the front end face of the object is in contact with each other, each of the divided underground structure members can be independently pushed or propelled by traction or the like, and only the pipe group on the front end face side of the underground structure member to be propelled at the same time. The pipe group and the underground structural member can be smoothly and efficiently replaced while being moved forward.

Further, since the divided underground structure members are independently propelled, it can be constructed by a propulsion means of a smaller scale than the conventional method of propelling the entire underground structure. Since the hollow enclosing wall members that are in sliding contact with each other are fixed to the divided surfaces of the object members, each of the underground structural members is smoothly and accurately propelled while sliding the other enclosing member using one enclosing wall member as a guide. Therefore, even an underground structure having a long or large cross section can be easily constructed.

Further, after each divided underground structure member is buried underground, concrete is cast between the insides of the surrounding wall members which are communicated with each other, whereby the divided underground structure members can be integrated. At this time, the hollow interior of the enclosing wall member is used as a working space, so that iron distribution and formwork assembling work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a simplified longitudinal side view of an underground structure being constructed.

FIG. 2 is a longitudinal sectional front view of the constructed underground structure.

FIG. 3 is a simplified vertical sectional front view of a pipe body buried underground,

FIG. 4 is an enlarged simplified view of a sliding pipe body portion,

FIG. 5 is a simplified longitudinal front view of upper and lower underground structural members,

FIG. 6 is an enlarged sectional view of the surrounding wall member.

FIG. 7 is a simplified cross-sectional view showing a state where the surrounding wall members are communicated with each other;

FIG. 8 is an enlarged sectional view thereof;

FIG. 9 is a cross-sectional view showing a state where the surrounding wall members are integrated.

FIG. 10 is a longitudinal sectional front view of a pipe body;

FIG. 11 is a longitudinal side view thereof,

FIG. 12 is a partial simplified longitudinal front view showing another embodiment of the present invention;

FIG. 13 is a longitudinal sectional front view showing a state in which a joint portion between upper and lower underground structural members is provided in that portion.

FIG. 14 is a simplified longitudinal side view showing a conventional example,

FIG. 15 is a simplified vertical sectional front view of the pipe row portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper underground structural member 2 Lower underground structural member 3, 4 Enclosure wall member 5 Concrete 6 Pipe 6a, 6b Sliding pipe

Continuation of front page (72) Inventor Kiyoshi Masuoka 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (56) References JP-A-52-75017 (JP, A) (JP, U) JP 34-5794 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9/04

Claims (2)

(57) [Claims] 1. An underground structure formed by combining and joining at least vertically or horizontally divided structural members, and an enclosing wall that forms a hollow portion facing each other at joint end surfaces of the structural members. An underground structure in which members are integrally attached over the entire length, and concrete members are cast between the communicating hollow portions of the surrounding wall members to integrate the structural members. 2. A wall member having a shape in which a pipe body is buried in a cross-sectional position of an underground planned underground structure in a state of being juxtaposed, and at least vertically or horizontally divided into an underground structure, and the divided end surface thereof Are buried in the ground by abutting the front end face of the divided structural member integrally attached over the entire length to the rear end face of the side-by-side pipe body, and replacing these structural members with the side-by-side pipe body. Thereafter, a method of constructing an underground structure is characterized in that concrete is cast in a hollow portion communicating with the surrounding wall members to integrate the structural members.