JPS62215729A - Method and apparatus for correcting unequal settlement of building - Google Patents

Abstract

PURPOSE:To increase the bearing capacity of the foundation as well as correct unequal settlement of a building by a method in which a space is excavated between the downside of the foundation settled unequally and the ground, a thin bag is inserted into the space, and a fluid is injected into the bag and hardened. CONSTITUTION:A trench 5 is formed by excavating the ground below the base 3a of a foundation 3 unequally settled and a bag 10 of a hollow baggy soft material 11, e.g., of vinyl chloride or rubber, is inserted into the space. A connecting tube 20 is projectionally fixed to the side of the bag 10, a valve 21 is provided and connected with a pipe 22, and a fluid is injected under pressure into the bag 10 from a pump 24. By the bag 10 is expanded, compressing action is applied until the ground 4a having lowered bearing capacity can have a bearing capacity. Under a condition that the foundation 3 is pressed upwards by the settled height, the injection of the fluid is stopped, the valve 21 is closed, and the fluid so injected is solidified. Since the fluid is integrated with the base 3a to support the load of a building, the occurrence of resettlement can be prevented.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the non-uniform soot construction method for buildings, and in particular, it is easy to use a fluid injected into a bag without using mechanical devices such as jacks. This invention relates to a construction method for correcting uneven settlement of buildings, which allows buildings to be elevated to allow correction work to be carried out, and to a bag used for this purpose.

(Prior art) Due to the recent shortage of land for residential use and the rise in land prices in locations with good conditions, there is an increasing tendency for land for general residential use to be sought on slopes, etc., which have poor conditions. . Therefore, it is common practice to cut down sloped land, create housing lots in the form of stairs, and build houses on each plot.

However, if the land is not sufficiently stable,
After building a building, the foundation may have settled unevenly,
As a result, the pre-erected condition of doors and other fittings becomes poor, making it difficult to close the doors, and causing inconvenient conditions such as lifffi and soot on the sides when the doors are closed.

In particular, in this case, it is necessary to allow sufficient time after filling the earth for the ground to harden naturally, or to avoid compaction of the ground so that the soil has sufficient durability. It occurs when a building is built and then used as a residence while it is not generated.

It is something. The uneven settlement rarely occurs in a state where the entire building is tilted in one direction, but often occurs as an undesirable phenomenon such as a part of the foundation sinking in particular.

Therefore, as a construction method for correcting uneven settlement of buildings, the method shown in FIG. 6 has conventionally been used. This is done by driving piles 17 on the sides of the area where uneven settlement has occurred, and by 11iKDJing the lower part of the foundation 3 to form a large groove 5, and the piles exposed in the groove 5. 17, fix the bracket 18 to
A jacking device 16 is installed between the upper surface and the lower surface of the foundation 3, and the foundation 3 is raised by the jack 16.

Then, such work is to be performed on the entire basis that generated the inequality law r, and for that purpose,
A large number of piles are driven, a jack 16 is installed on each pile, and the work of lifting the foundation is carried out all at once.

Thereafter, concrete or the like is poured into the space formed between the ground 4 and the foundation to stabilize it, and the groove 5 is backfilled to return it to its original state.

(Problem to be solved by the invention) However, as mentioned above, the construction method that uses jacks to lift the foundation is not suitable for areas where the uneven settlement occurs in areas outside the building. This can be done relatively easily if it occurs only in
If uneven subsidence occurs in a location that includes the interior of a building, the floor of the building will be removed, the floor will be excavated, and devices such as jacks will be installed under each foundation to recover the area. It would be extremely difficult to excavate a deep trench like the one described above.

Furthermore, uneven foundation settlement does not occur locally but generally over a relatively wide area, so uneven settlement of foundations occurs at regular intervals along the foundation where the uneven settlement has occurred. Piles must be driven.

After that, a very wide area will be excavated for the foundation correction work, and multiple jacks will be used to lift it up, so the amount of soil that will be discharged will be relatively large. In addition to the need to secure a place to dispose of the soil, there are other drawbacks such as an increase in the overall construction cost.

Therefore, a pile driving machine must be installed in a narrow area around the building and a large number of piles must be driven first, and then excavation and foundation lifting work must be carried out, which is a relatively tedious task. It must be made.

In addition, the people living in the house will be forced to live inconveniently during the construction period, and the longer the repair work takes, the more they will have to pay extra burdens in addition to the construction costs.

For example, in the case of a ready-built house, the warranty period is 10 years.
If unequal subsidence occurs within 10 years, the burden on the building seller will be large, and if unequal subsidence occurs after 10 years or more, the burden on the homeowner will be very heavy. In addition to being large, people are also forced to endure the inconvenience of having to live in houses that are increasingly poorly constructed due to uneven subsidence.

In addition, even if the above-mentioned conventional repair work is carried out, the ground supporting the foundation will not be strengthened.
The ground itself will be left with its bearing capacity as low as before, and the foundation of the building will now be supported only by piles, and if the ground loosens further, uneven settlement may occur again. Gender remains.

(Objective of the Invention) The present invention solves the drawbacks of the conventional uneven settlement correction method for buildings as described above. A construction method and device for strengthening the ground supporting the foundation by injecting fluid into the bag, thereby increasing the bearing capacity of the ground and correcting uneven settlement. The purpose is to provide a bag body.

(Means and effects for solving the problem) The uneven settlement correction method for buildings of the present invention involves excavating a gap between the bottom surface of the foundation that has caused uneven settlement and the ground, and inserting a thin comb into the gap. A bag is inserted, a fluid whose consolidation speed can be controlled is injected into the bag, the pressure of the fluid consolidates the ground, and the foundation is raised through the consolidated ground. By allowing the injected fluid to solidify over a certain period of time, the solidified material is left on the underside of the foundation along with the bag, and is used as a support member for the foundation, becoming integrated with the ground.

In addition, in the uneven settlement correction method for buildings of the present invention, the number of inserted bags is adjusted according to the amount of foundation settlement, and fluid under pressure is injected into each bag at the same time. The foundation can be corrected to the same level by controlling the injection of fluid into each bag while observing the rise of the foundation that has caused equal settlement.

Furthermore, the fluid used in the method of the present invention is produced by mixing a solidifying material such as cement milk with a fluidity improver, a solidification time regulator, etc., and its fluidity and solidification time can be adjusted. Thus, the fluid produced using the mixing device can be injected into the bag using a pump.

The bag body is made of a flexible member, and a connecting pipe for injection is protruded from the bag body, and a pipe from a pump is connected to the pipe via a valve. The body is made of vinyl or rubber material, and a pressure-resistant mesh or other layer is integrally formed inside the body.

Therefore, by using the construction method of the present invention, it is possible to make the excavation depth on the underside of the foundation shallower than with conventional construction methods, and even if uneven settlement occurs over a long section, it can be corrected. Therefore, by using a large number of bags, it becomes possible to raise uniformly without causing cracks in the foundation, and the injection pressure IIm etc. at that time can be easily performed. .

In addition, the bag used in the construction method of the present invention has a relatively low manufacturing cost, and by inserting it under the foundation in a thin state and then inflating it, it can achieve the same effect as Zitsuki. Since it can be fully utilized, foundation modification work can be done very easily and the construction cost can be done relatively cheaply.

(Example) The uneven settlement correction method for a building according to the present invention will be explained according to the illustrated example.

As shown in FIG. 1, in a typical house, the cloth foundation 2 of a building 1 is arranged so as to support the periphery of the building 1, the parts on which a large amount of load is applied, and the parts of the partitions.

In addition, when the above-mentioned cloth foundation 2 is shown in cross section, it has a substantially inverted T-shape as shown in FIG. It consists of 3a.

First, a foundation lifting device used in the uneven settlement correction method for buildings of the present invention will be explained. Figure 4,
Also, as shown in FIG. 5, in the present invention, a bag 10 is used in place of the conventional jacking device.

The bag 10 is a bag-shaped hollow member made of a vinyl chloride-based or rubber-based flexible member 11, and a connecting pipe 20 is fixed and protrudes from a predetermined position on the side thereof. A valve 21 is provided on the connecting pipe 20, and the pipe 2
2 is connected to the fluid delivery circuit of the pump 24 via the vibrator 22.

The bag 10 of the present invention has a cross-sectional shape as shown in FIG. 5A or 5B, and members such as a reinforcing net 15 are integrally inserted inside the bag. In other words, the fifth
In the example shown in Fig. A, a mesh 15 is inserted in a layered manner into the center of the flexible member 11.
The flexible member 11 is made of rubber or plastic as described above.

Furthermore, in the example shown in FIG. 5B, the flexible member 11
The net 15 as a reinforcing member inserted into the middle layer 13
is formed integrally with the flexible member F, and an E layer 12 is formed on it.
, and the lower layer 14 are bonded together to form an integral structure.

In the case of the example shown in FIG. 5B, the materials used for the flexible members do not have to be of the same material. For example, even if rubber is used as the flexible member, the net 1
5 and a middle layer rubber material are integrally vulcanized to form a thin plate, rubber plates of different materials are pasted on the top and bottom of the thin plate, and the flexible member 11 is vulcanized and bonded together. Configure it.

The reinforcing member such as the net 15 inserted into the flexible member 11 described above may be a net-like member made of any material such as wire mesh, nylon net, or other synthetic fibers, or a material similar to textiles. It is necessary that the reinforcing member and the flexible member work together to resist the internal pressure of the bag.

Furthermore, the reinforcing material can ensure sufficient integrity so that when pressure is applied to the bag body, the mesh 15 etc. become integrated with the flexible member and can resist the pressure. By configuring it in this way, if pressure is locally concentrated, the flexible member will separate from the mesh and pop out from between the meshes, causing the bag to tear. It is possible to prevent accidents from occurring.

For example, in the case of a house, it is assumed that the maximum load of the building applied to the foundation 2 is about 3 t/m, and the load is 50 t/m.
If it is supported and supported by a bag with a width of c11 x 501, the pressure applied to the bag will be about 1.25N9/cd, and even if you try to load twice that amount, it will be about 3 to 9/aJ. It becomes possible to construct a structure having enough strength to withstand the pressure of

Although it is possible to sufficiently secure the above-mentioned strength using hard rubber or a relatively thick synthetic resin material, it is possible to ensure safety by inserting a reinforcing member inside the flexible member 11. This makes it possible to further improve performance.

Further, after the bag of the present invention is used as a jacking member, it remains inserted under the foundation together with the fluid contained therein, and is used as an integral part of the ground. In particular, it is not a good idea to use materials with high unit costs.

The bag 10 of the present invention is constructed by bonding the sides of two sheet members configured as described above to form a thin bag-like member, and as described later, there is a high pressure inside the bag. This is a member that has enough strength to withstand the pressure when a fluid is press-fitted.

As shown in FIG. 4, the bag 10 of the present invention is configured in any square or rectangular shape, the width of which is approximately equal to the width of the base, and when inserted under the foundation. , formed in such a size that it does not protrude from its sides.

A connecting pipe 20 is provided in a protruding manner at a predetermined position, and a vibrator 22 is connected to the connecting pipe 20 through a valve 21, and the fluid kneaded by the mixer 25 can be sent to the bag body 10 by the pump 24. It will be done like this. Further, a pressure gauge 23 is provided at a predetermined location of the vibrator 22, so that the pressure when the fluid is press-fitted is constantly monitored, and the opening degree of the valve 21 can be adjusted.

Next, the uneven settlement correction method for a building according to the present invention will be explained.

As shown in Figure 2, the group 1113 that has experienced uneven settlement
The groove 5 is formed by excavating to the bottom of the base 3a, and a gap is formed below the base 3a. The gap is the bag body 10
It is fine as long as it is high enough to insert the .

Then, insert the bag body 10 between the connecting pipes 2 and 2.
Connect the vibrator 22 to the pump 2 through the valve 21 and
The fluid can be press-fitted from 4.

When a fluid is press-fitted into the bag body 10, the bag body 10 expands and is subjected to an action that causes it to bulge in the vertical direction.
As shown in FIG.
acts to compress the ground 4a until sufficient bearing capacity is generated.

After that, when the ground 4a on the lower surface of the base 3a is sufficiently compressed, as shown in FIG. ,
It begins to act as a force that pushes foundation 3 upward. Then, in a state where the fluid is pushed up by the submerged height h, the work of press-fitting the fluid is stopped, and the valve 21 is closed.
The fluid is solidified while it is kept in the bag 10, and the solidified fluid and the ground 4a are integrated under the base 3a and can be supported.

Further, as shown in FIG. 3, a bag body 1o is inserted in the length direction of the foundation 3 in response to the sinking of the foundation 3, so as to push up the foundation.

For example, as shown in FIG.
0 is inserted, and bags are inserted on both sides with the gap gradually widened in accordance with the amount of subsidence, and the foundation 3 is pushed up.

In that case, the pressure of the fluid supplied to each bag body is controlled by each valve while monitoring the pressure M, and the leveling device constantly monitors the rise ld1 of the foundation. As shown in FIG. 3(B), it is raised in a uniform manner, and the entire foundation is pushed up to the original position of the reference plane 6.

Therefore, in the above-mentioned embodiment, especially in places where the amount of settlement is large, the bag 10 laid under the foundation
The number of bags is increased so that the soil bearing capacity of the Al14 is restored by the expansion of the bags, and in response to a large additional load, a large number of bags work together to perform a pushing action. Therefore, the load is not concentratedly supported on a specific bag body.

After this pushing up work, a gap will be created between the base 3a and the ground 4a where the bag does not exist, but cement milk or concrete is press-fitted into that area to create a gap between the base 3a and the ground 4a. Construction work will be carried out to block the foundations so that the entire foundation ground can support the building load on average, and after the construction is completed, the soil will be returned to 15 and the construction will be completed.

The fluid to be press-fitted into the bag body 10 of the present invention is mainly a solidifying material such as cement milk, and a fluidity improver and IJ! A mixture of I regulators, etc. is used, and these materials are put into the mixer 25, mixed and stirred, and then pumped using the pump 24 to be press-fitted into the bag. It is.

In addition to using cement milk as described above, commercially available bentonite, water glass, etc., solidifying materials such as chemical substances can also be arbitrarily selected, and these can be used singly or in combination. It is possible to use these by mixing them in a predetermined ratio, and as the fluidity improver, it is possible to use a type commonly called an AE agent or other materials.

Furthermore, the solidification time regulator uses a substance that can adjust the solidification time of solidified materials, and all of these materials are commercially available as civil engineering materials, and the solidification time inside the bag can be adjusted as desired. By adjusting the solidification time, fluidity can be ensured while the foundation is being pushed up, and it can be solidified quickly after the work is completed. .

Note that the above-described embodiments of the present invention have been described for the case of correcting uneven settlement of relatively lightweight buildings such as houses.
The construction method of the present invention is not particularly limited to houses etc.
, it can be applied for the recovery of uneven settlement of other types of buildings such as factories and tanks.

In addition, the bag used in the construction method of the present invention is not limited to the rectangular shape as described above, and its planar shape can be arbitrarily configured, and when the bag is configured with a V4 layer, For example, instead of simply gluing the upper and lower members together, you can place another wide sheet member between them by changing the material that makes up the surface of the upper part or by appropriately changing the connecting structure of the side parts. Naturally, improvements such as making it possible to set the height of the bag when inflated to a larger value can be made in response to the conditions at the construction site.

(Effects of the Invention) Since the uneven settlement correction method for buildings of the present invention uses a method of pushing up the foundation using a fluid as described above, during the construction, the amount of ground excavation is reduced compared to the conventional method. It is possible to significantly reduce the amount of work compared to the construction method, and it is also possible to shorten the construction period.

Furthermore, it is possible to reduce the types and number of mechanical devices brought to the site during construction.In addition, the materials such as bags and fluids used in the uneven settlement correction method for buildings of the present invention are Since materials with relatively low unit prices can be used, construction costs for correcting uneven settlement can be significantly reduced.

In addition, in the uneven settlement correction method for buildings of the present invention, it is possible to simultaneously perform reinforcement work on the ground whose bearing capacity has decreased at the same time as pushing up the foundation. It is possible to reliably prevent ground subsidence from occurring again, and the fluid press-fitted into the bag is
It also supports the load of the building by integrating with the base.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the relationship between the building and the foundation, Fig. 2 is an explanatory diagram showing an example of the uneven settlement correction method for buildings of the present invention, and (A) to (C) are respectively the order of work. Figure 3 is a side view showing an example of the uneven settlement correction method for a building.
A) is engineering! (B) shows the state at the start of ISrM, (B) shows the state at the end, FIG. 4 is an explanatory diagram showing the relationship between the bag body of the present invention and parts and materials for pumping the fluid, and FIG. 5 shows the state at the end of the ISrM. 5A and 5B are sectional views each showing the structure of the bag, and FIG. 6 is an explanatory diagram showing the conventional construction method. FIG. Codes in the diagram: 1...Building, 3...Foundation, 4...
...Ground, 5...Groove, 6...Reference surface, 10...Bag body, 11...Flexible member,
12... Upper layer, 13... Middle layer, 14.
... lower layer, 15 ... rope, 16 ...
・Jyatsuki@Yi, 17...Base, 18...
...Moving member, 20...Connecting pipe, 21...
...Valve, 22...Pipe, 23...
...Pressure gauge, 24...Pump, 25...
·mixer. ,・04＼

Claims (5)

[Claims] (1) A gap was excavated between the bottom surface of the foundation that had uneven settlement and the ground, and a thinned bag was inserted into the gap, making it possible to control the consolidation speed of the bag. The fluid is injected, and the pressure of the fluid consolidates the ground under the foundation where the bearing capacity has decreased, and the foundation is raised through the ground whose bearing capacity has been improved, and the injected fluid is Uneven settlement of a building characterized by solidifying inside the bag after a certain period of time so that the solidified members are interposed on the underside of the foundation together with the bag and used integrally with the ground. Modification method. (2) Adjust the number of bags inserted according to the amount of foundation subsidence, inject pressurized fluid into each bag at the same time, and observe the rise of the foundation that has caused uneven settlement. The uneven settlement correction method for a building according to claim 1, wherein the foundation can be corrected to the same level by controlling the amount of fluid injected into each bag. . (3) The fluid is composed of a mixture of a solidifying material such as cement milk, a fluidity improver, a solidifying time regulator, etc., and the fluidity and solidifying time can be adjusted, and the fluid is manufactured using a mixing device. Claim 1, characterized in that the fluid is injected into the bag using a pump.
Method for correcting uneven settlement of buildings as described in Section 1. (4) A bag made of a flexible material is used as the bag body, and a connecting pipe for fluid injection is provided at a predetermined location of the bag to protrude, and a valve is provided on the pipe for fluid supply. A bag body used in a method for correcting uneven settlement of buildings, characterized in that it is configured to be connected to a pipe. (5) The flexible member constituting the bag is made of vinyl or rubber material, and a layer of reinforcing material such as a pressure-resistant net is provided inside the flexible member. Bag described in section.