JPH0547710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is applicable to
Lines from 10mm to 700mm, hereinafter simply referred to as proximity lines. ), a new underground structure or
This relates to a chiseling construction method for existing underground structures in the vicinity, which enables the construction of underground walls, earth retaining walls, etc. (hereinafter simply referred to as new underground structures).

"Conventional techniques and their problems" Conventionally, as a method for collapsing existing underground structures,
A construction method that uses excavators (excavation machines) is usually adopted.

However, with this construction method, it is not possible to place an excavation hole on the adjacent line, and as a result, it is not possible to collapse the existing underground structure constructed on the adjacent line.

Therefore, a method has been adopted in which, after the existing underground structure has collapsed due to the excavation, the remaining underground structure is removed using a chisel machine, which requires a great deal of time, effort, and labor.

Therefore, it is difficult to construct a new underground structure on the adjacent line, and it is considered to be impossible as a result.

However, this is not impossible if the applicant uses the connected wall construction method of constructing a continuous earth retaining wall in Patent No. 1599399, to which the applicant has already obtained the rights, after the collapse.

In addition, the construction methods that utilize sheet piles, struts, sills, etc., which are currently in use in some areas, may have almost the same problems as the construction methods that utilize excavations.

It is no exaggeration to say that with the conventional chisel construction method and underground wall construction method detailed above, a new underground structure cannot be constructed at a location where an existing underground structure is located on the adjacent line. In particular, noise caused by construction work has become a major problem.

"Means for Solving the Problems" In view of the above, the present invention is capable of reliably collapsing an existing underground structure on a line of proximity. In some cases, after the collapse of the existing underground structure, a construction method has been invented to reliably and easily construct a new underground structure in the vicinity of the existing underground structure, thereby making it possible to utilize the land effectively. It is.

The gist of this is to remove earth and sand from existing underground structures such as underground walls, and then pass struts between the exposed existing underground structures.This earth removal and strut passing work is repeated in sequence. , a strut installation step in which a number of struts are appropriately passed between the existing underground structures, and when the strut installation step is completed, this step is carried out in order to remove the bottom part of the existing underground structure. The entire bottom part is completely collapsed by repeating the refilling process, in which the collapsed debris is sequentially collapsed from the middle part of the bottom part toward the side part, and the collapsed rubble is transferred towards the middle part of the collapsed bottom part. A bottom collapse and refill process that involves collapsing and refilling the existing underground structure, exposing the side surface of the existing underground structure, and performing the refilling to form a gap in which the side surface can collapse; When the collapse and replacement are completed,
While sequentially collapsing the exposed side portions of the existing underground structure, the collapsed debris is transferred to the gap, and at least debris, stones, etc. are mixed into the side portion of the collapsed existing underground structure portion. When an earth mound is filled with empty earth and sand, the side wall of this section collapses, the soil filling process for the collapsed side wall is completed, and the side wall of this section ends. When the collapse and earth embankment have been completed, the next block of earth embankment and the collapse of the side part of the existing underground structure will begin.In this case, first the struts will be removed, and then the existing underground structure will collapse. Fill the object with earth and sand brought in from outside to the extent that the sides of the object are exposed, perform temporary inner bottom filling work to form a temporary bottom part, and then perform the same work as above. Collapse of the side part of the existing underground structure, transfer of the collapsed debris to the temporary bottom part, and at least fill the collapsed side part with earth to collapse the next section and complete the earth filling work. Collapse of the side part of the plot and earth filling process, Collapse of the side part of each plot and earth filling work detailed above, removal of existing struts, and earth mounding on the side part of the existing underground structure This is a chiseling method for an existing underground structure such as an underground wall on a proximate line, which is characterized by repeating the work and performing each of the above-mentioned works upward from the bottom side of the existing underground structure.

"Operation" To explain the operation of the present invention, first, the earth and sand in the existing underground structure is excavated and removed, and the excavation and removal are repeated until the existing underground structure does not collapse. state.

Therefore, in order to prevent the existing underground structure from collapsing and to completely eliminate any negative impact on adjacent structures and the ground, so-called strut installation work involves installing an appropriate number of struts using the strut construction method. has ended,
The state shown in Figure 2 will be reached.

Next, construction is carried out in the order shown in Figure 3 (hereinafter referred to as the same figure), but first, as a general rule, water is drained to remove any harmful effects caused by water such as spring water.

After that, as shown in Figure A, when first removing the bottom part of the existing underground structure, the bottom part collapses sequentially from the part shown by the chain line in the middle part toward the side part. Remove some of this collapsed debris to other parts.

When the bottom section collapses, some earth and sand are excavated, and this excavated earth and sand is treated in substantially the same manner as the collapse debris described above.

The above excavation is carried out in sequence as shown by the imaginary line in A of the same figure, and the collapse and some of the earth and sand are excavated, and the collapse debris and the excavated earth and sand are transferred toward the middle part of the vacant bottom part.

Through such work, it is possible to easily process and transport the collapsed debris and excavated soil, and ultimately, the entire bottom section is collapsed and the collapsed debris is successively replaced on the bottom section.

However, please do not pile up the collapsed debris all over the bottom.
A refill gap is formed around it. in particular,
As will be described later, a gap will be created to the extent that the sidewalls of the existing underground structure can collapse.

When the bottom part collapses and the replacement work with a gap is completed, the state shown in FIG.

Subsequently, when the collapse and replacement of this bottom part is completed, as shown in Figure C, the side parts of the exposed existing underground structure are sequentially collapsed, and the part indicated by the chain line in the Figure is collapsed. This becomes what is called a collapsed side part.

In this way, the collapsed debris is transferred to the refilling gap, as shown in FIG. 2, and the gap is filled with the above-mentioned good soil.

Then, as shown in the figure (e), in the gap formed in the side part of this collapsed existing underground structure,
Earth mounds are gradually filled with good soil. By repeating this sidewall collapse and filling operation in the horizontal direction, all the sidewalls of the existing underground structure in this section are completely collapsed and the earth is filled on the collapsed sidewalls.

This completes the collapse of the earth embankment of one section of the foundation and the side portion of the existing underground structure.

Therefore, as shown in the same figure, the next section of earth embankment and the side wall of the existing underground structure will collapse.In this case, first, the outside will be collapsed to the extent that the side wall of the existing underground structure will be exposed. The soil was filled with soil brought in from
As shown by the imaginary line, fill the temporary bottom part that will constitute the temporary bottom part.

After that, as shown in Fig. 3, the side part of the existing underground structure collapses, the collapsed debris is transferred to the temporary bottom part, and the side part that forms an earth mound on the collapsed side part collapses and the earth embankment is carried out in the same manner as the above-mentioned process. accomplish the work.

At the end of this process, the state shown in Figure 1C is reached, where the sidewalls of the existing underground structures in the repeated section have collapsed and the earth mounding work has been completed.

Furthermore, in accordance with the length of the side part of the existing underground structure in the erection direction, the removal of the struts, the collapse of the side part of the existing underground structure in one section, and the earth-filling work are repeated, and the existing ground is removed. For example, on the side of a medium structure, approximately 10mm to 700mm from the boundary,
Good soil is mounded (see the rim of the same figure).

As a result, as shown in the same figure, the side parts of the existing underground structures are filled with good soil, and new underground structures can be constructed at any time, and the adjacent structures or ground There is almost no negative impact on

``Example'' The illustrated equipment and devices represent an example best suited for use in carrying out the present invention, and include 1 an adjacent building, 2 a foundation block, 3 a foundation pile,
4 is the side part of the existing underground structure (including the side wall part),
5 is a bottom part of the existing underground structure, and 6 is a room such as a garage, a storeroom, a basement, etc. formed by constructing the existing structure.

When collapsing the side part 4 of the existing underground structure, first the bottom part 5 is collapsed and replaced, and once the work of collapsing the bottom part 5 is completed.

Subsequently, the side surface portion 4 begins to collapse, starting from the bottom side 6a (lower side) of the side surface portion 4 and gradually collapsing toward the ground side 6b (upper side). From the so-called bottom side 6a upwards, it is collapsed, and measures such as filling with earth and removing struts are performed.

Therefore, the collapsed side part due to the above treatment is 4a
, and the earth mound filled with this collapsed side surface portion 4a is indicated by 7.

Reference numeral 8 in the figure indicates a strut installed between the side parts 4 and 4 of the existing underground structure, which is installed as appropriate depending on the depth dimension of the room 6. The pressure is increased or decreased according to the pressure load, and is configured so that there is no adverse effect on adjacent structures. Furthermore, as the side surface portion 4 collapses sequentially from below to above, it is sequentially removed from the bottom surface side 6a toward the ground side 6b.

Reference numeral 9 denotes fill soil made up of earth and sand brought in from outside, which moves upward from the bottom surface 5 and is used as a temporary bottom surface when collapsing the side surface 4 of the existing underground structure in each section. 9a.

The above codes and the work or composition of the codes are as follows:
The same applies to the case where each section is sequentially configured by repeating the process.

By mounding at least the collapsed side surface portion 4a with good soil, a new underground structure can be constructed in this mounded area.

"Effects of the Invention" As described in detail above, the present invention first drains water after installing the strut, and then first removes the bottom part. The structure will collapse sequentially from the middle part to the sides, and the entire bottom part will be collapsed in sequence, leaving only a part and the work will be done to replace it, and the side parts of the existing underground structure will be exposed. The bottom part collapsed and was replaced.

When the collapse of the bottom part and the replacement are completed, the side parts of the exposed existing underground structure are sequentially collapsed and the collapsed debris is transported toward the center, and at least the collapsed existing underground structure is When the side part of an underground structure is filled with soil in order of good soil, so-called collapsed and filled soil and earth mound is made for an entire section, here is the collapsed and filled soil of the side part of the first section. , and the earth mounding ends.

Next, the earth mound and side wall of the next block will be collapsed. First, fill in the ground with earth and sand to the extent that the side wall is exposed, and then fill in the temporary bottom that will form the temporary bottom.

After that, the collapse of the side part, similar to the process described above,
Transfer of collapsed debris and mounding of soil at least on the side of the collapse, so-called collapse and filling of the side of the collapse;
By completing the soil filling work, the collapse and filling of the side of the repeated section, and the soil filling are completed.

Furthermore, in accordance with the length of the side section in the erection direction, the removal of the struts and the collapse of the soil mound and side section of the repeated section are repeated, so that at least the collapsed side section is
Good soil is piled up.

Thereafter, a new underground structure is constructed at this earth mound (good soil) location, which is a chisel construction method that involves collapsing and filling the side wall on the adjacent line, and at least filling the collapsed side wall with earth.

Therefore, the side part of an existing underground structure built on the adjacent line can be reliably and easily hung, and due to this effect, a new underground structure can be attached to the side part of the existing underground structure. This has the effect of allowing structures to be built reliably and easily.

Furthermore, due to the above effects, a new underground structure can be constructed on the adjacent line, and as a result, the amount of unused land is extremely reduced, which is extremely effective in making effective use of land.

Further, the present invention first prevents the existing underground structure from collapsing by using struts or raising the sides (not shown), and at least prevents the collapsed side surface from collapsing. In the part corresponding to
This is a construction method that involves mounding with better soil than the outside.

Therefore, there is almost no negative impact on the adjacent ground, such as cracks, loosening, collapse, etc. Similarly, it is an excellent construction method that is extremely unlikely to cause problems such as tilting of buildings such as houses and fences, and ground subsidence.

Furthermore, the present invention is a method of filling at least the side portions of an existing underground structure with soil that is better than the outside.

Therefore, on the side part of the existing underground structure,
This has the effect of allowing new underground structures to be constructed reliably and easily.

In addition, the present invention first collapses the bottom part from the middle, and then collapses the side part of the existing underground structure corresponding to the first section and performs work such as earth mounding. The collapse and filling of the area, as well as the earth embankment, have been completed.

Then, the side of the existing underground structure corresponding to the next section collapses and is filled with earth, and after filling with earth and sand to form a temporary bottom part, the side of the existing underground structure mentioned above is collapsed. The collapse of the side of the existing underground structure, the filling of soil, and the filling of soil are completed by repeatedly collapsing the side of the existing underground structure and filling the area with earth.

Thereafter, in accordance with the length of the side part of the existing underground structure in the erection direction, the removal of the struts, the collapse of the side part of the existing underground structure in one section, and the filling and embankment are repeated, This involves filling the area of the collapsed side of the existing underground structure with good soil.

After that, in the part of the existing underground structure that collapsed,
This is a construction method that allows new underground structures to be constructed reliably and easily.

Therefore, when demolishing an existing underground structure and constructing a new underground structure in this location, it has the effect of being able to construct it efficiently in a very short period of time.

[Brief explanation of the drawing]

The drawings show one embodiment of this construction method, and Figure 1 is a cross-sectional view of the existing underground structure with the earth and sand removed before construction, and Figure 2 is a cross-sectional view of the construction method shown in Figure 1. A cross-sectional view of the beam with the beam attached, and FIGS. 3A to 3A are schematic diagrams showing an example of the construction procedure. 1... Building, 2... Foundation block, 3... Foundation pile, 4... Existing underground structure, 4a... Collapsed side part, 5... Bottom part, 6... Room, 6a... Bottom part side, 6b...ground side, 7...mound, 9...filling soil, 9a...temporary bottom part.

Claims (1)

[Scope of Claims] 1. Earth removal and strut passing work in which earth and sand are removed from existing underground structures such as underground walls and struts are passed between exposed existing underground structures. A step of installing struts in which a number of struts are passed between the existing underground structures by repeating them in sequence, and when the step of installing the struts is completed, removing the bottom part of the existing underground structure. Then, the bottom part is successively collapsed from the middle part of the bottom part to the side part thereof, and then the collapsed rubble is transferred to the middle part of the collapsed bottom part. A bottom collapse and replacement process in which all of the collapse and replacement work is carried out, and the side part of the existing underground structure is exposed and the part is replaced so as to form a gap in which the side part can collapse; When this bottom collapse and replacement are completed,
While sequentially collapsing the exposed side portions of the existing underground structure, the collapsed debris is transferred to the gap, and at least debris, stones, etc. are mixed into the side portion of the collapsed existing underground structure portion. When an earth mound is filled with empty earth and sand, the side wall of this section collapses, the soil filling process for the collapsed side wall is completed, and the side wall of this section ends. When the collapse and earth embankment have been completed, the next block of earth embankment and the collapse of the side part of the existing underground structure will begin.In this case, first the struts will be removed, and then the existing underground structure will collapse. Fill the object with earth and sand brought in from outside to the extent that the sides of the object are exposed, perform temporary inner bottom filling work to form a temporary bottom part, and then perform the same work as above. Collapse of the side part of the existing underground structure, transfer of the collapsed debris to the temporary bottom part, and at least fill the collapsed side part with earth to collapse the next section and complete the earth filling work. Collapse of the side part of the plot and earth filling process, Collapse of the side part of each plot and earth filling work detailed above, removal of existing struts, and earth mounding on the side part of the existing underground structure A chiseling method for an existing underground structure such as an underground wall on a proximal line, characterized in that the work is repeated and each of the above-mentioned works is performed upward from the bottom side of the existing underground structure.