JP3416759B2 - Underground structure frame building equipment - 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 skeleton construction apparatus for carrying out a reverse construction method for constructing a skeleton structure of an underground structure of a building.

[0002]

2. Description of the Related Art A construction method for constructing an underground structure of a building, especially a structure, is to construct a mountain retaining wall, excavate the ground inside the mountain retaining wall, and install an abdomen and a cutting beam inside the mountain retaining wall. It is a progressive construction method that supports the walls and the ground and constructs a structure in which the skeleton of the underground structure is sequentially stacked from bottom to top after completion of root cutting, and conversely, the ground-level floor is constructed first, and then It is roughly divided into the reverse construction method in which the ground is excavated and the construction of the skeleton is proceeded downward from the first basement floor to the second basement floor. However, the above-mentioned sequential driving method requires a great deal of man-hours and time for removing and removing the temporary material such as the abdomen and the beams, and especially for a wide and deep underground structure. Further, there is a drawback that the progress of construction and the environment of the work place are influenced by the weather conditions.

On the other hand, in the case of the upside down construction method, there is an advantage that the preceding skeleton also serves as a cutting beam, and also serves as a roof at the construction site, so that all-weather work can be performed. But the progressive method,
Regardless of which construction method is used, the construction of the structure of the underground structure is delayed in terms of industrialization and automation of production as compared with the above-ground construction, and it is possible to shorten the construction period, save labor, and reduce temporary construction costs. It has become a problem to be solved.

The reverse construction method proposed in order to solve such a problem is disclosed in Japanese Patent Laid-Open No. 148854/1993 (ground and underground simultaneous construction method for construction) and Japanese Patent Laid-Open No. 5-255943 (construction of an underground skeleton by a slide-down method). Construction method). The "construction method of the underground skeleton by the slide-down method" disclosed in Japanese Patent Laid-Open No. 5-255943 is carried out by using the slide jack 35 shown in FIG. 12, and the construction period of the underground skeleton of the building is shortened and labor is saved. The purpose is to achieve. As shown in FIG. 12, according to Japanese Unexamined Patent Publication No. 5-255943, the true post 3
The pedestal 31 is fixed to the upper part of 0, and the slide jack 32 that expands and contracts like a potato is installed vertically downward on the pedestal 31. Below the jack rod 33 that penetrates the slide jack 32 in the axial direction, The steel beam 34 is fixed and suspended by the rod chuck 35.

[0005]

However, the above-mentioned conventional structure for constructing a frame for an underground structure such as a slide jack used in the reverse construction method has the following problems. The skeleton constructing device for underground structures disclosed in Japanese Patent Laid-Open No. 5-255943 shown in FIG. 12 has a pedestal 31 fixed to the upper part of a true post 30 and a slide jack 32 that expands and contracts like a caterpillar. It is installed vertically downward on the gantry 31. However, in the structure of this frame building device, the weight of the steel frame beam 34 depends on the rod chuck 35 and the jack rod 3.
3, the structure jack 3 through the slide jack 32 and the gantry 31
In addition to 0, a large eccentric load acts on the true column 30.
Therefore, a problem of safety in the construction work of the structure of the underground structure occurs, and from the viewpoint of the safety, in the structure of the structure construction device, the number of steel beams 34 that can be suspended through the slide jack 32 is at most the limit. Therefore, there arises a problem that the efficiency of the work for constructing the frame of the underground structure is hindered.

Therefore, the present invention has been made in view of the above problems in the prior art, and is an underground structure which has high safety and can improve the efficiency of the skeleton construction work of the underground structure by the reverse construction method. It is an object of the present invention to provide a frame building device.

[0007]

[Means for Solving the Problems] That is, in the structure for constructing a skeleton of an underground structure according to the present invention, a jack stand is attached to a true column, and the other end of a back stay having one end attached to the jack stand is attached to a mountain retaining wall. The lift-down hydraulic jack is arranged in a region opposite to the back stay via the structure column.

By arranging a plurality of the hydraulic jacks for lift down, the work of lifting down with the underground structure, the floor, the steel frame truss and the like suspended by the hydraulic jacks for lift down can be performed more safely and smoothly.

When a plurality of lift-down hydraulic jacks are arranged in this way, the lift-down hydraulic jack is formed by connecting the mounting position of the lift-down hydraulic jack on the jack mount and the mounting position of the back stay on the jack mount. It is advisable to attach the jack pedestal to the true column in the area inside the boundary. By doing so, even if the underground structure, floor, steel truss, etc. are lifted down while being suspended by the lift down hydraulic jack, the steel truss etc. added to the jack mount via the lift down hydraulic jack Since the weight of the column and the bearing force applied to the jack platform via the back stay by the mountain retaining wall are suspended near the fulcrum position, a large eccentric load and bending moment act on the column. This can be prevented, and the suspension of the underground skeleton can be performed in a stable state.

When a plurality of lift-down hydraulic jacks are provided at a predetermined position in this way, if the number of lift-down hydraulic jacks mounted on the jack rack is even, the lift-down hydraulic jack on the jack rack is fixed. It is easy to make the load on the structural columns unbalanced by making the arrangement of the structure balanced so that the tension rods are arranged avoiding the beams or steel trusses that are the main structures of the structural columns and the underground structural frame. It becomes possible to do.

[0011]

Therefore, according to the skeleton construction apparatus for an underground structure of the present invention as described above, for example, even if the underground skeleton, the steel frame truss and other floors are lifted down in the state of being suspended by the lift down hydraulic jack, Since those loads are supported by the mountain retaining wall via the jack stand and back stay, eccentric load and bending moment do not act on the true column, and construction work of the underground structure can be performed safely and efficiently. Is possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An underground structure skeleton building apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In the structure constructing device for an underground structure of one embodiment of the present invention shown in FIGS. 1 and 2, the jack mount 10 is attached to the stigma of the true post 2.
Hydraulic jack 1 for lift down on the jack stand 10.
1 is installed. As shown in FIG. 1 and FIG. 2, the other end of the back stay 12 having one end attached to the jack mount 10 is attached to the mountain retaining wall 1, and the region opposite to the back stay 12 via the structure column 2. The lift-down hydraulic jack 11 is arranged in X.

As shown in FIG. 2, in this embodiment, two lift-down hydraulic jacks 11 are provided, a lift-down hydraulic jack 11a and a lift-down hydraulic jack 11b. As shown in FIG. 3, the lift-down hydraulic jack 11a and the lift-down hydraulic jack 11b.
Of the back stay 12 and the center of the mounting position of the back stay 12 on the jack mounting base 10 within a region Z inside the boundary Y formed by connecting the center of the mounting position of the back stay 12 to the true post 2 and the jack mounting base. 10 is attached. In other words, lift-down hydraulic jack 11
a and a center O ₁ , O ₂ of the mounting position of the lift-down hydraulic jack 11b on the jack mount 10 and a center O ₃ of the mounting position of the backstay 12 on the jack mount 10 of a boundary Y formed. The jack pedestal 10 is attached to the structure column 2 such that the center O _{4 of the} mounting position of the structure column 2 to the jack frame 10 is located in the inner area Z.

Next, an example of the construction of the skeleton of the underground structure, which is carried out by using the skeleton structure of the underground structure according to the embodiment of the present invention, will be described. As shown in FIG. 4, when constructing the skeleton of an underground structure by using the skeleton constructing apparatus for an underground structure of the present invention, first, the Yamadome wall 1 is constructed. The mountain retaining wall 1 can be constructed by various known methods. After constructing the Yamadome wall 1, the true pillar 2 is installed. The structure column 2 may be a temporary steel frame column, but in consideration of work efficiency, it is desirable to use a permanent steel column. In particular, when the skeleton building apparatus for underground structures of the present invention is used, it is possible to prevent eccentric stress from being applied to the true-columns 2 during the building work process. Therefore, the true-columns 2 can also be used as permanent steel columns. No trouble will occur. Next, primary root cutting is performed, and a flat slab or the like 4 serving as an underground skeleton is placed on the ground 3 to form a space 5 above the flat slab 4.

Next, as shown in FIG. 5, a steel frame truss 6 is grounded, and concrete 7 constituting the floor is placed on the steel frame truss 6 to construct a large span floor A. The steel truss 6 is not temporarily installed but is permanently installed. After the permanent steel truss 6 is grounded, the members constituting the floor are placed on the truss 6 (that is, concrete 7 is laid, or PCa Plate, half PCa plate, etc.) is used to build a large span floor A. At this stage, diagonal beams 9 are temporarily attached to the lower portion of the steel truss 6 as shown in the figure.

Next, as shown in FIG. 6, a floor B on the upper floor is constructed on the large span floor A, thereby saving labor for supporting work. Furthermore, the top slab C is constructed on the floor B. The top slab C is constructed at a regular level using the floor B, and this top slab C functions as a mountain retaining support and serves as a work floor for the next process. In this construction example, at this stage, as shown in the figure, the jack stand 10 is attached to the stigma of the true post 2, and the lift-down hydraulic jack 11 is installed on the jack stand 10. As described above with reference to FIG. 1 and FIG. 2, the other end of the back stay 12 having one end attached to the jack mount 10 is attached to the mountain retaining wall 1, and the region opposite to the back stay 12 via the true post 2 is provided. Since the lift-down hydraulic jack 11 is arranged in X, the lift-down hydraulic jack 11 is arranged at the stigma of the structure column 2, and the underground structure 4, floor B, large span floor A and steel truss 6 are arranged. Even if the machine is lifted down while being suspended by the lift-down hydraulic jack 11, the true column 2
The eccentric load and bending moment do not act on.

As described above with reference to FIG. 2, in the present embodiment, the lift-down hydraulic jacks 11 are the lift-down hydraulic jacks 11a and the lift-down hydraulic jacks 11.
Since two base stations b are provided, the work of lifting down the underground structure 4, the floor B, the large span floor A, and the steel frame truss 6 suspended by the hydraulic jack 11 for lifting down can be performed more smoothly. Further, as shown in FIG. 3, the lift-down hydraulic jack 11a and the lift-down hydraulic jack 1
In the region Z inside the boundary Y formed by connecting the centers O ₁ and O ₂ of the mounting positions on the jack mount 10 of 1b and the center O ₃ of the mounting positions on the jack mount 10 of the back stay 12 described above. Jack stand 10 of true pillar 2
Since the jack mount 10 is attached to the true post 2 so that the center O ₄ of the attachment position with respect to
Even if the underground structure 4, the floor B, the large span floor A, and the steel frame truss 6 are lifted down with the hydraulic jacks 11a and 11b for lifting the lift down, an eccentric load is applied to the structure column 2. It is possible to prevent the suspension of the underground structure 4 and the like in a stable state.

In this embodiment, two lift-down hydraulic jacks 11 are provided at predetermined positions as described above, and the number of lift-down hydraulic jacks 11 mounted on the jack mount 10 is even. The arrangement of the hydraulic jacks 11 for lift-down in Fig. 2 is well balanced so that the load applied to the true column 2 is even. Next, as shown in FIG. 7, secondary root cutting is performed with a minimum root cutting depth that can lift down the floor B to a normal level. After that, the underground structure 4, the floor B, the large span floor A, and the steel frame truss 6 are lifted down in a state of being suspended by the lift down hydraulic jack 11,
The floor B is installed at a regular level so as to be in close contact with the Yamadome wall 1 and to be integrated with the structure column 2 for fixing. Floor B to Yamadome Wall 1
When integrating with the structure column 2, concrete 1a is embedded in the gap between the floor B and the mountain retaining wall 1 and the structure column 2, and the floor B is inserted through the concrete 1a. Fix for 2.

Next, tertiary root cutting is performed with the minimum root cutting depth that allows the large span floor A and the steel truss 6 to be installed at a regular level. Then, as shown in FIG. 8, the underground structure 4, the large span floor A, and the steel frame truss 6 are hung by the lift-down hydraulic jack 11 and lifted down to a normal level. Here, in this construction example, the mountain retaining wall 1 is constructed by an RC continuous wall, and as shown in FIGS. 8 and 9, the large span floor A and the steel truss 6 are provided.
After being lifted down to a normal level, a hydraulic jack 13 and a hydraulic jack 14 are provided between the end of the large span floor A and the mountain retaining wall 1 and between the end of the lower truss 6a of the steel truss 6 and the mountain retaining wall 1.
Is arranged, and the mountain retaining wall 1 is preloaded by the hydraulic jacks 13 (13a, 13b) and the hydraulic jacks 14.
Thereby, the stress applied to the mountain retaining wall 1 can be controlled and its deformation can be prevented. Further, after the large span floor A and the steel frame truss 6 are lifted down to a regular level, the large span floor A and a large jack other than the position where the hydraulic jack 13 arranged between the end of the large span floor A and the mountain retaining wall 1 are arranged. Concrete 1b is placed in the gap between the span floor A and the mountain retaining wall 1 to integrate the large span floor A with the mountain retaining wall 1 and with the structure column 2. As a result, the large span floor A is given the function of supporting work.

Next, as shown in FIG. 10, fourth root cutting is performed in a state where the underground structure 4 is suspended by the lift-down hydraulic jack 11. This 4th root cutting is a large span floor A
And the minimum root cutting depth at which the underground structure 4 can be installed with the steel truss 6 fixed in the proper position, that is, under the floor in the case of the flat slab structure, in the general floor of girders and girders. Is aimed at a depth of 1.5 m from the top of the floor. After the fourth root cutting, one end of the oblique cutting beam 9, which is temporarily attached to the lower part of the steel truss 6 as described above, is attached to the lower part of the steel truss 6, and the other end is erected on the mountain retaining wall 1. To do. By attaching the diagonal cutting beams 9, the stress and deformation of the mountain retaining wall 1 can be suppressed to be small. Next, as shown in FIG. 11, the underground skeleton 4 is fixed in a regular position, and thereafter, root cutting and underground skeleton construction are repeated as necessary, and the deepest skeleton of the underground structure having a desired number of floors is provided. Build and finish building the structure. In the above process, root cutting at each stage can be performed by a known automatic excavator.

[0021]

As described above, according to the structure constructing device for an underground structure of the present invention, the jack stand is attached to the true column, and the other end of the back stay having one end attached to the jack stand is attached to the other end. Since it is mounted on a wall and the lift-down hydraulic jack is arranged in the area on the side opposite to the backstay via the structure pillar, the safety is high and the structure of the underground structure by the reverse construction method is used. The construction work can be performed efficiently, and even an underground structure having a large space can be efficiently and safely constructed by the reverse construction method by using the structure constructing device for an underground structure of the present invention. . In particular, according to the structure constructing device for an underground structure of the present invention, work at high places is not involved and there is little danger, so that the safety and efficiency of construction is improved.

[Brief description of drawings]

FIG. 1 is a side view showing an installed state of a lift-down hydraulic jack applied in an embodiment of an underground structure skeleton building apparatus of the present invention.

FIG. 2 is a front view showing an installed state of a lift-down hydraulic jack applied in one embodiment of the underground structure skeleton building apparatus of the present invention.

FIG. 3 is a schematic view showing an installation state of a lift-down hydraulic jack applied in an embodiment of the underground structure skeleton building apparatus of the present invention.

FIG. 4 is an explanatory diagram showing a step of an example of a structure construction work of an underground structure of the underground structure skeleton construction apparatus of the present invention.

FIG. 5 is another explanatory diagram showing the next step of the step shown in FIG. 4 of the example of the substructure construction work of the substructure of the substructure construction apparatus of the present invention.

FIG. 6 is another explanatory view showing the next step of the step shown in FIG. 5 of the example of the construction work of the skeleton of the underground structure of the underground structure skeleton construction apparatus of the present invention.

FIG. 7 is an explanatory view showing a step subsequent to the step shown in FIG. 6 of the example of the substructure construction work of the substructure of the substructure construction apparatus of the present invention.

FIG. 8 is an explanatory diagram showing a step subsequent to the step shown in FIG. 7 of the example of the construction work of the skeleton of the underground structure of the underground structure skeleton construction apparatus of the present invention.

FIG. 9 is an explanatory view showing details of the process shown in FIG. 8 of an example of a substructure construction work of the substructure of the substructure construction device of the present invention.

FIG. 10 is an explanatory view showing a step subsequent to the step shown in FIG. 9 of the example of the structure construction work for the underground structure of the underground structure body construction device of the present invention.

FIG. 11 is an explanatory diagram showing a step subsequent to the step shown in FIG. 10 of the example of the substructure construction work of the substructure of the substructure construction apparatus of the present invention.

FIG. 12 is an explanatory diagram of a conventional structure building device for an underground structure.

[Explanation of symbols]

1 ... Yamadome wall, 2 ... Structural column, 4 ... Underground structure (flat slab), 6 ... Steel truss, A ... Large span floor, 9 ... Diagonal beam, 10 ... Jack stand, 11 ... Hydraulic jack for lift down, 12 ...
-Back stays, 13, 14, 16 ... hydraulic jacks, 15 ... Pillar upright.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 29/045 E21D 13/00

Claims (4)

(57) [Claims] 1. A jack stand is attached to a true pillar, and the other end of a back stay having one end attached to the jack stand is attached to a mountain retaining wall, and the area inside the area opposite to the back stay is provided through the true pillar. An apparatus for constructing a skeleton for an underground structure, in which the hydraulic jack for lift-down is arranged. 2. The skeleton building apparatus for an underground structure according to claim 1, wherein a plurality of the hydraulic jacks for lifting down are arranged. 3. A true pillar in a region inside a boundary formed by connecting a plurality of mounting positions of the lift-down hydraulic jacks on the jack rack and a mounting position of the back stays on the jack rack. The structure building apparatus for an underground structure according to claim 2, wherein a jack stand is attached to the. 4. The substructure construction apparatus for an underground structure according to claim 2, wherein the number of the lift-down hydraulic jacks mounted on the jack stand is even.