JPH02125014A - Adjacent house collapse preventing method in weak ground drilling - Google Patents

Abstract

PURPOSE:To prevent an adjacent house from collapse at the time of ground drilling by penetrating vertical members until they reach a supporting layer leaving a fixed zone along the adjacent house built on the weak ground and tying up the vertical member the joist of the adjacent house. CONSTITUTION:In drilling the base of a structural steelwork 3 adjacent to an existing wooden building built on the relatively weak ground 1, a vertical member such as old rails 6 and the like are interpenetrated along the adjacent wooden house 2 leaving a fixed space H until the old rails reach a supporting layer 7 of the bottom part of the ground 1. Each old rail 6 and a cross joist bearing a floor board 8 of the wooden house 2 are tied up with a galvanized iron wire 10, iron wire, or the like. After the base of the structural steelwork 3 is drilled and the base is constructed, the ground 1 between the wooden house 2 and the structural steelwork is refilled, and the old rails 6 are drawn out so as to perform restoration work. The existing house is thus prevented from collapse and inclination as well as preventive work is done positively at a relatively low cost so as to reduce the construction expenses.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to soft ground excavation used when constructing a new building or other structure adjacent to an existing wooden house built on soft ground. This relates to a method for preventing the collapse of adjacent houses.

[Conventional technology]

As shown in FIG. 3, when constructing a new rigid structure 3 such as a building adjacent to a wooden house 2 built on relatively soft ground 1, a sheet pile 4 is installed around the rigid structure 3. A foundation was excavated on the inside of the concrete structure, and a resistor 5 was poured.
However, especially in the case of an old wooden house 2 with a flexible structure built on soft ground 1, it tends to tilt or collapse as shown by arrow T during construction, and conventional measures to prevent this are extremely expensive. There was a problem.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned conventional problems, and when excavating the foundation of a structure adjacent to an existing house such as a wooden house, it is possible to easily prevent the existing house from collapsing or leaning. The purpose of this invention is to provide a method for preventing the collapse of adjacent houses during excavation in soft ground, which is possible and relatively inexpensive.

[Summary of the invention]

The collapse prevention method of the present invention for achieving the above object is as follows:
When excavating the foundation of a structure in relatively soft ground, vertical members such as H-shaped steel beams, This method is characterized by penetrating the support layer until its lower end reaches the support layer, and then connecting each vertical member to the joist, which is a crosspiece that receives the floorboards of an adjacent house, with wire or cordage. After constructing the foundation of a structure, by completely backfilling the ground between adjacent houses, a new structure can be built without affecting the neighboring houses.

〔Example〕

The present invention will be described in detail below with reference to the drawings. Fig. 1 is a front sectional view of an embodiment in which the method of the present invention is applied to prevent the collapse of an adjacent house during excavation in soft ground. FIG. 2 is a side sectional view taken along the line A--A in FIG. 1.

First, in order to construct a new rigid structure 3 as shown by the dashed line adjacent to an existing building such as a wooden building built on relatively soft ground 1, when excavating the foundation of the rigid structure 3, A plurality of vertical members such as old rails 6 are placed in the ground 1 at predetermined intervals H1, for example, in this embodiment, at intervals of H=4 to 5 m along the wooden house 2, which is a house. Penetrate until it reaches.

Next, each old rail 6 and a joist 9, which is a crosspiece for receiving the floorboard 8 of the wooden house 2, are connected using wires 10 or wires.

After carrying out the collapse prevention work of the adjacent wooden house 2 as described above, the foundation of the rigid structure 3 is excavated in the same manner as before, and after the foundation is constructed, the ground 1 between the wooden house 2 and the rigid structure 3 is By completely backfilling the rails and pulling out the old rails 6 for restoration work, the adjacent wooden house 2 will not be affected.

In the above embodiment, the old rail 6 is used as the vertical member, but instead of the old rail 6, any vertical member such as an H-beam, an I-beam, or even a sheet pile may be used.

[Effects of the Invention] As explained above, according to the method of the present invention, when excavating the foundation of a rigid structure adjacent to an existing house such as a wooden house, it is possible to easily prevent the existing house from collapsing or leaning. As well as being able to
Since the collapse prevention work can be carried out relatively inexpensively and reliably, there is an advantage that the overall construction cost can be reduced.

[Brief explanation of drawings]

Figure 1 is a front cross-sectional view of an example in which the method of the present invention was applied to prevent the collapse of an adjacent house during excavation in soft ground;
The figure is a side sectional view taken along the line AA in FIG. 1, and FIG. 3 is a front sectional view for explaining the state in which an adjacent house is tilted during conventional soft ground excavation. 1... Relatively soft ground, 2... Wooden house, 3...
・Rigid structure, 6... Old rail, 7... Support layer, 9.
...Joist, 10...Wire, H...Predetermined interval. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] When excavating the foundation of a structure in relatively soft ground, vertical members are penetrated into the ground at predetermined intervals along adjacent houses until they reach the supporting layer, and each vertical member and adjacent house are A method to prevent adjacent houses from collapsing when excavating soft ground by connecting the joists together.