JP2013502521A - Structure support system - Google Patents

Abstract

  The present invention relates to a system for supporting a structure that helps increase the bearing strength of a foundation ground. In addition to the superstructure with sufficient resistance, the structure foundation must also have sufficient bearing strength to meet the stability requirements. No matter how safe the superstructure is constructed, if the bearing strength of the foundation is not sufficient, subsidence of the structure, inclination, and cracks and damage on the superstructure are inevitable. In other words, in order to be able to safely support the foundation load, in addition to the safety of the superstructure, the performance of the subsoil must be satisfied.

Description

  The present invention relates to a system for supporting a structure that helps increase the bearing strength of a foundation ground.

  Pile foundations, mini piles and infusion techniques are among the most used among the traditional methods used to strengthen the ground beneath current structural foundations. However, in addition to the high cost of the strengthening method, significant adverse effects are encountered such as the inability to use the structure for a long time during the strengthening construction phase and the structure being destroyed in a significant manner. The cement used as the injecting material does not provide the necessary silty clay ground penetration and cannot penetrate into the silty clay ground and is therefore ineffective.

  There are patents that improve ground using injection of high expansion chemicals by injection techniques. As an example, a patent application of EP 0851064 can be shown. In said application, a number of holes are drilled in the ground and chemicals are injected into it. After reaction of the chemical, an expansion of more than 5 times the liquid volume is obtained, and the chemical pressure compresses the ground, thus increasing its resistance.

  Another example is disclosed in US Pat. No. 4,567,708. In said application, there is a disclosure to lift the foundation by filling the foundation foundation and the upper surface of the ground by injecting expansive chemicals directly under the foundation slab.

However, in order to apply the methods described in the above two patents, the ground must be strengthened by compaction. By using this method, it is possible to easily give resistance to granular ground such as gravel ground by injection, but this injection method is not effective for soft and highly flexible clay, and increases the bearing strength of the ground. I can't. Therefore, even if there is a ground with high bearing capacity, or if there is a rock layer very close to just a few meters below the foundation, chemical injection is ineffective and no reinforcement can be obtained.
In the event that chemical injection is inadequate, various patent applications have been developed to increase the bearing capacity of the ground where the structures are arranged in a cost-effective manner. One of them is a Japanese patent application of JP2009035927 in which a metal pipe is placed under the scaffold. The metal pipe is fitted in another foundation pile embedded in the ground, and these support the scaffold. Screw joints between piles ensure that all pipes are at the same height.

BRIEF DESCRIPTION OF THE INVENTION In addition to a superstructure with sufficient resistance, the structure foundation also has sufficient bearing strength to ensure that the designed and constructed structure is kept upright. There must be. No matter how safe the superstructure is constructed, if the bearing strength of the foundation is not sufficient, subsidence of the structure, inclination, and cracks and damage on the superstructure are inevitable. In other words, in addition to the safety of the superstructure, it is also essential to ensure that the bearing strength of the ground that supports the foundation of the building is at a sufficient level.

Means for Solving the Invention

  During the design phase of the designed and constructed structure, the foundation system, dimensions and depth are calculated by calculating the structural load on the foundation. The most important factor here is the bearing strength of the foundation ground. As a result, the foundation that delivers the structural load to the ground must be designed by taking into account the dimensions and depth of the scaffold and the bearing resistance parameters of the foundation ground. In most cases, however, the field conditions do not match the project data, and cracks and damage on the superstructure are seen due to foundation subsidence. At this stage, in order to restore the safety of the structure, it is necessary to strengthen the ground under the structure foundation.

The foundations of structures such as the ground on which the foundation pillars that support the pillars are placed need to support structural loads safely. For this reason, in static design there is a balance between structural loads, foundation dimensions and ground bearing parameters. However, due to unforeseen events that can occur, subsidence can occur in the foundation and cracks can be seen on the superstructure, which can pose a threat to the safety of the structure. In this case, it is essential to increase the bearing strength of the foundation.
In order to increase the bearing capacity, an elongated profile, preferably made from metal, is used to reduce the weight of the structure to the depth of the ground. The profile can support the weight towards a lower layer of the ground. In addition to this, a chemical having an expansion feature is used to increase the density of the ground around the profile. The chemical around the profile (T, L, square or similar section) is retained and the profile retains the ground with the effect of expansion and penetration caused by the chemical under the ground.

  In order to facilitate the penetration of chemicals into the ground, chemicals can be sent through pipes that function as injectors, and these can be released by perforations located on the pipes.

  To achieve the objects of the present invention, a system for supporting a structure is illustrated in the accompanying drawings.

It is a schematic diagram which shows the interaction of the system and ground which support the structure which is the 1st aspect of this invention. It is a schematic diagram which shows the state in which the system which supports the structure which is the 1st aspect of this invention is mounted on the rock layer. It is a schematic diagram of the system which supports the structure which is the 2nd aspect of this invention. It is sectional drawing of the pierced pipe contained in the system which supports the structure which is the 2nd aspect of this invention. It is sectional drawing of the pipe which is not perforated included in the system which supports the structure which is the 2nd aspect of this invention.

Each component in the figure is numbered, and these correspond as shown below.
1. Scaffold 2. Rod Chemicals 4. Injector 5. Perforated pipes 6. 6. Perforation Screw 8. Channel 9. Soft ground 10. Compressed ground 11. Hard ground 12. Gap (loose ground)

  The system for supporting the structure of the present invention basically comprises a scaffold (1) supporting or supporting the structure, at least one rod (2) arranged under each scaffold (1), and Chemical (3) that wraps around the rod and fills the gap between the rod (2) and the scaffold (1). The structure applies pressure to the ground on the plurality of scaffolds (1). In order to evenly distribute the weight of the structure relative to the ground, the number and size of the scaffold (1) and the number of rods (2) used with the scaffold (1) can be varied.

  As described above, the rod (2) is placed under the scaffold. Depending on the ground conditions or the static and dynamic conditions of the lifted structure, the rods can be arranged in a right angle and angled manner. However, in either case, if one end of the rod (2) is close to the scaffold (1), the other end is moved towards the depth of the ground. The basic function of the rod (2) is to support the structure by delivering the weight applied to the scaffold to the hard rock layer or by using the features of the internal soil layer.

  For this purpose, the rod (2) is used in two different ways in the system supporting the structure. The rod (2) in the model of the first aspect of the invention is placed under the scaffold and then subjected to chemical injection by being delivered to its surroundings by an injector (4). After injecting the chemical (3) with the injector (4), the chemical can be left under the soil and can be removed if they do not provide structural support.

  The chemical (3) used within the scope of the first aspect of the invention wraps around the outer periphery of the rod (2) and, thanks to its features, expands at least twice the liquid volume and then solidifies. The soft ground (9) turns into a ground (10) with a compressed layer thanks to the pressure caused by the expansion. When the outer circumference of the rod (2) is wrapped, the chemical (3) that increases the effective cross-sectional area of the rod (2) and at the same time helps to compress the soft ground layer is the bottom of the scaffold (1) Not only presses both the rod (2) and the solidified chemical (3) after expansion, but also in the ground, which is substantially harder than before to press against the ground compressed in all directions. Make sure that is inserted. In this way, structural loads or structural settlements for any reason are prevented.

  In addition to this, despite the benefits provided by chemicals, the rods may not have sufficient capacity to help the soft soil layer support the superstructure. In these situations, it is possible to add a number of rods (2) one after the other with screws (7) so that they are supported towards the hard ground (11) located deep in the soil. By fitting the rod (2) into the receiving hole of the hard ground (11), the weight of the structure can be delivered directly to the hard ground. Furthermore, it may be sufficient in most cases to support the weight of the structure, leaving the rod (2) resting on the hard ground (11) without being fitted into the receiving hole.

  In addition, the outer circumference of the rod (2) is filled with the chemical (3) applied by the injector (4) as described above to prevent them from buckling due to the added weight. It is. In this way, the weight of the structure is transferred to the hard ground (11) via the rod (2) and the chemical (3).

  In the second aspect of the invention, pipe (5) is used instead of rod (2), or rod (2) and pipe (5) are used together. The injection process is realized by perforations (6) located on the pipe (5), which are similar to the rod (2) without requiring the use of an injector (4).

  Since the pipe (5) also performs the injection process, it is not necessary to carry the injector (4) into the soil. At the same time, it is possible to perform a direct injection to the depth determined during the ground inspection. For example, if the injection is in a volume that is less resistant to expanding chemicals (3) and is located between two hard soil layers, the injection is located on the pipe (5). And can be realized by drilling (6) corresponding to the relevant depth.

  In addition, this may be possible by screwing and adding the rod (2) to the end of the pipe (5) by fitting the rod into the receiving hole of the hard ground (11). With such an application, the weight of the structure can be supported by a method in which the soft soil layer is compressed and the weight is delivered to the hard ground (11) at a deeper depth.

  Like the rod (2), the pipe (5) can be arranged in a right angle or angled manner. Furthermore, since the pipes (5) have a thread (7) structure and can be added together, they are theoretically not limited in any way with regard to their number and depth. The perforations (6) located on the pipe (5) can be opened in a single row or around the entire circumference of the pipe (5) in various numbers and diameters in such a way as not to destroy the durability of the pipe (5). it can.

  In a preferred embodiment of the invention, two different pipe (5) components are joined together by screws (7) in order to arrange the perforations (6) so that they correspond to a predetermined depth. It is possible to make it. One of these is a pipe (5) with a perforation (6) and a channel (8) that can carry liquid chemicals (3), the other is only a single channel (8). It has a pipe (5). Both pipe (5) components are joined together as desired and to ensure that the chemical (3) is applied into the soil.

  In either of the above-described embodiments of the present invention, basically the rod (2), pipe (5) and chemical (3) ensure an improvement in the ground on which the scaffold (1) is placed. However, another important object of the present invention is to support the scaffold (1) at a pre-determined height on a newly constructed structure or to a desired height on an existing structure (1). Is to lift. For this reason, because of the unpredictably unstable and various depth structures of the rod (2) and the pipe (5), and because of the wide pressure surface obtained on the narrowly sectioned rod (2), It is necessary to leave a gap (12) between the scaffold (1) and the rod (2).

In addition to forming a platform, it is possible to lift the structure from the scaffold (1) in order to support the scaffold (1) at the desired height by using the gap (12). The injection of the chemical (3) must take place inside the gap (12) in order to disperse the weight added to itself or to lift the structure.
The features and quantity of the chemical (3) to be injected are the volume of the gap (12) located on the rod (2) or pipe (5), the pressure generated by the expansion coefficient of the chemical (3), and the structure Can be determined by taking into account variables such as the height that is lifted.

  The structure of the chemical (3) can be similar to the structure of the chemical used around the rod (2) and the pipe (5) or can have a different composition.

  Pre-chemicals (3) are known in the building sector and these generally have a polymer substrate. Chemicals can be provided for different expansion rates, solid densities and different requirements.

  In the aforementioned embodiment of the present invention, there is a disclosure in which the structure is supported by the scaffold (1). Despite this, as is known in the current building sector, a strip foundation that delivers and / or distributes the weight of the structure to the ground by means of rods (2), pipes (5) and chemicals (3) It is also possible to support building elements such as foundation slabs.

  In addition to this, the diameter of the rod (2) and the pipe (5), preferably made of metal according to the building requirements, can be different from the volume of the gap (12). Basically, however, the diameter of the rod (2), pipe (5) and injector (4) allows them to be inserted into the soil without the need for excavation and It must have dimensions that prevent them from being damaged during removal.

  The system for supporting the structure of the present invention cannot be limited to the examples described above for clarity of explanation. The present invention is mainly as described in the claims.

Claims (16)

A system for supporting a structure that does not require excavation to improve the ground where the structure exists on the ground or where the building is made on the ground,
At least one rod (2) placed under the at least one scaffold (1) supporting or from the structure; and-the scaffold (1) stays or the scaffold (1 )) The gap (12) left between the rod (2) and the scaffold (1) being transported to a level to hold
Including
Also,
Filling the gap (12) remaining after the rod (2) has been placed,
-Ensure that the load on the scaffold (1) and the rod (2) is satisfied;
Chemicals (3) that can expand and solidify to an amount that is at least twice the liquid volume and are injected into the gap (12);
A system that supports structures. A system for supporting a structure according to claim 1,
The rod (2) is carried below the scaffold (1) and at right angles to its bottom surface,
A system that supports structures. A system for supporting a structure according to claim 1,
The rod (2) is carried under the scaffold (1) and at an angle different from the right angle to the bottom surface,
A system that supports structures. A system for supporting a structure according to claim 1,
A solid profile having an arbitrary section is transported to the ground instead of the rod (2),
A system that supports structures. A system for supporting the structure according to any one of claims 1 to 4,
Characterized by chemicals (3) injected into the soil by an injector (4) to increase the density of the soil around the rod (2),
A system that supports structures. A system for supporting the structure according to any one of claims 1 to 4,
In order to transmit the weight applied to the rod (2) to the hard ground (11) located deep in the ground, the rod (2) is inserted into the receiving hole in the layer or the rock is pressed. It is characterized by
A system that supports structures. A system for supporting a structure according to claim 5,
In order to cope with the weight added to the rod (2) in the soil layer by the chemical (3) and to transmit the weight added to the rod (2) to the hard ground (11), the rod (2 ) Is fitted into a receiving hole in the layer or left on the layer,
A system that supports structures. A system for supporting the structure according to any one of claims 1 to 4, wherein
Chemicals injected around the rod (2) by the injector (4) to prevent the rod (2) from buckling due to the added weight or to increase peripheral friction 3),
A system that supports structures. A system for supporting the structure according to any one of claims 1 to 8,
Characterized by chemicals (3) injected into the gap (12) to lift the scaffold (1) to a level higher than its current state and thus help lift the structure, A system for supporting a structure according to any one of the preceding claims. A system for supporting a structure according to any one of claims 1 to 9,
Characterized by a rod (2) and chemicals (3) used to support the strip foundation or foundation slab instead of the scaffold (1),
A system that supports structures. A system for supporting a structure that does not require excavation to improve the ground where the structure exists on the ground or where the building is made on the ground,
-A channel (8) in which the liquid chemical (3) is carried and which is below the at least one scaffold (1) supporting or supporting the structure; and At least one pipe (5) with at least one perforation (6) that allows the chemical (3) to be delivered outside; and-a pipe that moves below the level at which the scaffold stays or stays ( 5) the gap (12) left between the rod and the scaffold (1) formed by
Including
Here, chemical (3)
Fills the gap (12) left after the pipe (5) is placed and allows the weight added to the scaffold (1) and the pipe (5) to be dealt with a large surface area, rather than the liquid volume Swell and solidify to a volume that is twice, injected into the gap and ground, and further transported along the channel (8) in the pipe (5), compressing the soil by leaking from the perforations (6) , Characterized by ensuring that the pipe (5) keeps the soil,
A system that supports structures. A system for supporting a structure according to claim 11,
Characterized in that the pipe (5) is carried below the scaffold (1) and at right angles to its bottom surface,
A system that supports structures. A system for supporting a structure according to claim 11,
The pipe (5) is arranged below the scaffold (1) and is arranged at an angle different from a right angle with respect to its bottom surface,
A system that supports structures. A system for supporting the structure according to any one of claims 11 to 13,
In order to convey the weight to the hard ground (11) located deep inside the ground, the weight added to the pipe (5) is dealt with in the soil layer by the chemical (3) and the end of the pipe (5) A rod coupled to a receiving hole in the layer,
A system that supports structures. A system for supporting the structure according to any one of claims 11 to 14,
Features chemicals (3) injected into the gap (12) to lift the scaffold (1) to a higher level than its current state and thus help lift the structure And
A system that supports structures. A system for supporting the structure according to any one of claims 11 to 15,
Instead of the scaffold (1), characterized by a rod (2) and chemicals (3) used to support a strip foundation or foundation slab,
A system that supports structures.

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