JP3243538B2 - Connection method between buried box and shaft and structure of shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a submerged box and a shaft and a structure of the shaft.

[0002]

2. Description of the Related Art When a tunnel is formed by burying a box, it is necessary to connect the last laid body and a shaft. <B> In that case, there is a method of using a waterproof panel as one method. In this method, a water stop panel is installed in the gap between the shaft and the shaft by submerged work after the final submerged box is submerged, and the joint is constructed in a dry state in the box. <B> As another method, install a deadline outside the shaft, assemble the connection room and connection box that protrude for connection under the atmosphere inside the shaft, remove the deadline, and after pouring water, sink the final box. Then, the connection box is pulled out to connect the connection box and the final box. (FIG. 7)

[0003]

Problems to be Solved by the Invention The above-mentioned conventional connection method between a buried box and a shaft has the following problems. <A> In the above method <A>, the installation of the waterproofing panel is an operation underwater. Safety,
There is a problem in workability and quality. <B> In the method of <b> above, the space for assembling the connection box and the connection chamber is complicated with squirrels and upsets. Therefore, it is necessary to hang the material in small pieces, and the space for the assembling work is narrow, resulting in extremely uneconomical work. In addition, a large space is required for the box for connection and the temporary deadline for constructing the connection room.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above problems, and an object of the present invention is to provide a method of connecting a buried box and a shaft, which can be economically connected in a small space. And A further object of the present invention is to provide a vertical shaft structure that can easily adjust the position and direction between the final box and the vertical shaft.

[0005]

[Means for Solving the Problems] That is, according to the present invention, a connecting box storage chamber is previously recessed in a caisson constituting a shaft, and a connecting box comprising an outer cylinder and an inner cylinder is provided in the storage chamber.
The body is stored, and in the gap between the outer cylinder and the storage room wall
Adjust the construction error of the shaft to match the angle of the final box.
In this method, the inner cylinder is taken out of the storage chamber and brought into contact with the final box to connect the final box to the shaft. Also, the present invention comprises a connection box storage chamber recessed on the side surface, a lid covering the outside thereof, and a connection box connecting the final box and the shaft, and the connection box has a double corner. and configure <br/> a tubular member, to adjust the inclination of the shafts in the gap between the outer tube and the storage chamber wall, an inner cylinder housed in the barrel was movable in the final box-side, It is a vertical shaft structure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for connecting a submerged box and a shaft according to the present invention and the structure of the shaft will be described below with reference to the drawings. <A> Shaft The shaft 1 of the present invention is constituted by a caisson. The caisson is of a known structure that sinks while excavating the inside. However, the caisson used in the present invention has a storage chamber 3 for storing a connection box 2 to be described later, particularly in a part of a side surface thereof. If the storage room 3 is in an open state, the caisson will not be able to be settled.
The lid 4 is made of a steel plate or the like which can be easily disassembled.

<B> Connection Box 2 A connection box 2 connects the shaft 1 to the final box 5. This connection box 2 is constituted by a double rectangular cylinder.
That is, the outer cylinder 21 and the inner cylinder 22 are provided. The inner cylinder 22 housed inside the outer cylinder 21 is configured to be movable toward the final box 5 side. A certain gap is provided between the outer peripheral surface of the outer cylinder 21 and the inner wall of the storage chamber 3. Then, a temporary fixing material is temporarily fixed between the two members, and the temporary fixing material is removed as necessary, and a jack or the like is installed between them. By adjusting the expansion / contraction state of the jack group, the outer cylinder 21 can freely change its vertical gradient and transverse gradient while being inside the storage chamber 3.
Therefore, the installation angle of the inner and outer cylinders can be changed to a different angle from the inclination of the shaft 1.

[0008]

[Construction method] Next, a construction method will be described. <A> Construction of the shaft 1 The caisson having the above-described configuration is excavated inside and sunk into the seabed ground. On the side of this caisson is a connection box 2
A storage chamber 3 for storing the connection box is recessed, and a connection box is already stored therein. However, since the outside is covered with a lid, subsidence is not a problem. The shaft 1 is constructed by sinking the caisson in this manner.

<B> External Closure (FIG. 3) When the construction of the shaft 1 is completed, the steel pipe sheet pile 6 is placed around the connection.
The work space 7 is made by draining the inside by placing underwater concrete at the bottom and closing it. In this inside, a stand for supporting the final box 5 and other preparation work are performed. Shaft 1
The caisson that constitutes is not necessarily sunk in the correct direction and slope due to its construction method. Therefore, a member temporarily fixing the outside of the outer cylinder 21 and the inner surface of the storage chamber 3 is disassembled, and a plurality of jacks are arranged between them to supply hydraulic pressure. In this way, the cross slope and the vertical slope of the outer cylinder with respect to the shaft 1 are adjusted so as to match the angle of the final box 5 to be settled next. After this adjustment, concrete or mortar is cast between the outside of the outer cylinder 21 and the inside of the storage chamber 3 to achieve integration. (FIG. 4)

<C> Connection with the final box 5 When the preparation is completed by the above operation, the closing work using the steel pipe sheet pile 6 is dismantled. Next, the transported final box 5 is settled outside the shaft 1. The tip of the final box 5 is fixed in the immediate vicinity of the connection box 2. (FIG. 5) Then, the connecting box 2 is taken out of the storage chamber 3 and is brought into contact with the final box 5. (FIG. 6) This is an underwater operation. Thus, the connection between the final box 5 and the shaft 1 is completed. In this case, the connection box 2 may be moved from the final box 5 side or pushed out from the shaft 1 side. After the connection between the two is completed, the connection box 2 must be fixed so as not to move. For this purpose, for example, key grooves are respectively formed in the inner surface of the outer cylinder 21 and a part of the outer surface of the inner cylinder 22,
After the connection is completed, a method may be adopted in which both key grooves are arranged so as to coincide with each other, and mortar is injected into the grooves and fixed.

[0011]

As described above, the method for connecting the buried box and the shaft 1 according to the present invention has the following effects. <A> A structure in which a connecting box 2 is stored in advance in a shaft 1 using a caisson. For this reason, there is no need to assemble the connection box 2 outside the shaft 1 after being laid. Therefore, the working period is short, the external deadline is sufficient in a small space, and it is economical. <B> The connection box can be assembled on the ground and housed inside the caisson, so that a high-quality box can be manufactured accurately in a short time compared to the case where it is manufactured inside a narrow deadline. Can be. <C> Even if the connecting box 2 is housed inside the caisson, no irregularities are formed on the outer wall thereof, so that it does not hinder sinking. <D> Since the drawing direction of the connection box 2 can be freely and accurately corrected, even if the caisson is inclined, the connection with the final box 5 can be reliably performed.

[Brief description of the drawings]

FIG. 1 is an illustration of a caisson of the present invention.

FIG. 2 is an explanatory view of a connection method with a submerged box.

FIG. 3 is an explanatory view of a connection method with a buried box.

FIG. 4 is an explanatory view of a connection method with a buried box.

FIG. 5 is an explanatory view of a connection method with a submerged box.

FIG. 6 is an explanatory view of a connection method with a submerged box.

FIG. 7 is an explanatory view of a conventional connection method between a buried box and a shaft.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-60399 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/073

Claims (2)

(57) [Claims] 1. A connecting box storage chamber is recessed in a caisson constituting a shaft, and a connecting box including an outer cylinder and an inner cylinder is stored in the storage chamber, and a gap between the outer cylinder and a wall of the storage chamber is provided. Of construction errors in shafts
To adjust the angle to match the angle of the final box, take the inner cylinder out of the storage chamber and abut against the final box, and connect the final box to the shaft. 2. A connection box storage chamber recessed on the side surface, a cover covering the outside thereof, and a connection box connecting the final box and the shaft, wherein the connection box is a double cylinder. configured, to adjust the construction errors of the vertical shaft in the gap between the outer tube and the storage chamber wall, an inner cylinder housed in the barrel was movable in the final box-side, the vertical shaft structure