KR101598119B1 - Mortar grout injector and adjust the liquid density and viscosity grout is abundantly mixed liquidity mortargrout piles composition method - Google Patents

Abstract

The present invention is to provide an underground foundation construction method by pressure tamping injection of mortar grout wherein density and viscosity adjustment liquid grout is abundantly mixed using a mortar grout injector. To achieve this, according to the present invention, the underground foundation construction method by pressure tamping injection of mortar grout wherein density and viscosity adjustment liquid grout is abundantly mixed using a mortar grout injector (20), wherein an injection tube body (21), an injection pipe cutting unit (22), a reverse discharge prevention tube (23), a permeable membrane body (30), an injection tube (25), a permeable membrane body upper end closing unit (31), and a permeable membrane body lower end closing unit (32) are formed, comprises the following steps of: assembling and preparing the mortar grout injector (20); constructing a mortar grout continuously mixed production supply system; forming a drilling hole; fixing the mortar grout injector (20); compressing and tamping the ground; contracting the injection tube (25) to be left from the mortar grout injector (20) to be drawn out; preventing mortar grout from being reversely discharged; and forming a pillar-shaped improvement body.

Description

TECHNICAL FIELD The present invention relates to a mortar grout injector and a method for constructing an underground foundation by pressure compaction injection of a mortar grout having a multiplicity of liquid grout, wherein the mortar grout injector has an abundantly mixed liquidity mortargrout piles composition method.

The present invention relates to a method of constructing an underground foundation by pressure compaction injection of a mortar grout having a point composition adjusted by a grout grouting injection mechanism, and more particularly, to a method of constructing a grout grout using a pressurized The mortar grout columnar reforming body is formed by compression injection and the mortar grout reforming body is formed in the course of the mortar grout columnar reformer, Point composition adjustment using a grout injection mechanism The present invention relates to a method of constructing an underground foundation by pressure compaction injection of a mortar grout having a multiplicity of liquid grout.

The method of constructing the pile body in the ground is to construct a pile body by introducing the existing pile such as steel pipe pile or PHC pile into the ground of the target pile or by using the result of the retrofit treatment of the target pile by the grouting method, As a method of constructing the

The method of constructing the pile body by directly penetrating the foundation pile into the ground of the target pile is utilized as a useful foundation construction method which is implemented by various materials and methods because of its simple construction process and excellent quality.

The method of retrofitting the target soil by grouting method and constructing the grout pile body can be carried out by a method in which the bottom soil of the structure in use, the superficial soft soil layer, the vulnerable soil where lateral flow may occur, It is widely used as a ground foundation construction method in the ground of a condition which can not be made.

The grouting methods applied for the purpose of constructing the grout pile bodies on the target soil are to dynamically dissolve the characteristics of the target ground and the inherent stress system by the hydrodynamic force, The method of grout pile body formation by high pressure injection substitution injection method which is carried out with the concept of the ground and the natural stress system of the target ground are actively disassembled by the rotation of the stirring blades by the mechanical force, A grout pile body composition method by deep mixing and substitution method which is implemented as a concept to dynamically improve engineering properties and a mortar grout with a predetermined material characteristic are formed by pressure compaction injection into a target soil to form a pile body, It is implemented as a concept to improve the engineering characteristics by static compression compression method De grout can be largely divided into three types, such as grout pile body composition method by pressure compaction injection method.

Herein, the ground foundation construction method by the pressure compaction injection of the mortar grout in which the viscous adjustment grout grout is subjected to the point composition adjustment using the mortar grout injection mechanism according to the present invention, is performed by the mortar grout pressure compaction injection method Which is a method of forming a grout pile body.

The mortar grout pressure compaction injection method is a method in which the mortar grout, which is pressure-injected into the ground of the target ground by the mortar grout pressure pump, expands in the ground and occupies space to form a columnar reformer, It is a method to perform the effects that occur in parallel.

The mortar grout pressure compaction injection methods that are being implemented with this purpose and concept are generally low in fluidity depending on the material characteristics required in the process of compressing and compacting the mortar grout, Mortar grout is used.

In addition, the size of the columnar reformer formation standard is determined by the amount of the mortar grout which is pressure-compaction-injected by the depth of the predetermined position by injecting the low-flow viscous mortar grout into the target ground, and in the process, The concept is applied to the effect that the compression of the surrounding ground will be as much as the volume formed in the ground

The mortar grout reformer formed through this process is used as a grout pit body.

Here, the above-mentioned mortar grout may be applied for two purposes mainly by forming a columnar reformer by injecting pressure into the ground.

One is that the mortar grout is subjected to pressure compaction injection in a certain range of the target ground, and the plastic reaction resistance force of the ground caused by the expansion of the mortar grout, The purpose of this study is to improve the geotechnical characteristics of the target soil by substituting the mortar grout with the amount of injected mortar grout without any restriction.

The other is to distribute the mortar grout to a predetermined depth of the ground in a predetermined depth range of the target ground and to distribute the injected amount by the depth and to distribute it by depth and to inject the molten grout, The reformer standard is determined and the purpose is to form the columnar reformer from the lower end to the upper end of the depth range of the target by this process and utilize the columnar reformer as the ground structure as the pile.

In the present mortar grout pressure compaction injection method, which is carried out for the above two purposes, the mortar grout for pressure compaction injection is expanded in the ground of the target ground and occupies a space. In the process of forming the columnar reformer, In order to increase the effect of compression and compaction of the ground, a mortar grout with a low viscosity and low viscosity is generally used.

Mortar grout, which has such a low viscosity and low fluidity, is composed of two components: the constituent material components are separated from each other or mixed with the soil of the target soil in the process of pressure compaction injection in the ground of the target ground, There is an advantage in that it is intended to expand the space by compressing and compacting, and to form mortar grout reformer.

On the other hand, heterogeneous objects, which are different from each other in material properties and behaviors, are injected by pressure, pushing each other, taking up space and compression, There are also a number of problems caused by the difference between them.

First, unlike other dynamic ground improvement grouting methods, the mortar grout is injected under pressure in the ground, and the expansion process is a passive injection in which the size and shape of the columnar reformer are changed according to the ground conditions.

The characteristics and behavior of the mortar grout, which is subjected to the pressure compaction injection, are investigated by using the mortar grout, which is continuously injected by pressure through the injection pipe inserted in the ground of the target soil. Due to the characteristics, the outer circumferential surface of the mortar grout reformer can not expand due to the uniform pressure on the entire boundary surface, and the mortar grout is biased and expanded in the direction of pressure intensification and injection in the ground A phenomenon appears.

This suggests that the morphology of the mortar grout reformer is irregular and is formed into an arbitrary irregular shape depending on the soil condition.

Second, the soil to be improved is generally saturated and exists in a state where pore water pressure is higher than a certain level. When the mortar grout, which has very different physical properties and behavior characteristics, is injected by pressure, The pore water pressure is locally increased on the interface with the surrounding ground in the direction of expansion, and the split fracture is generated. When the fracture occurs locally, the mortar grout to be injected thereafter is concentrated So that the phenomenon of expanding is progressed.

Third, irregular and biased expansion as described above in the process of pressure intensification injection into the ground of the mallet grout with low fluidity, and increase of the local pore pressure and fracture of the ground caused in the surrounding ground, It can act as a cause of sudden displacement and damage of the buried structure or structure adjacent to the depth of injection site.

Since the impact of the mortar grout injection and the injection rate can not be attenuated after the displacement starts to occur in the embankment or the structure adjacent to the depth of the injection site, the pressure compaction injection is stopped, There is a problem in that the formation of the columnar reformer by the pressure compaction injection of the mortar grout is ended as a result of no meaning.

Fourth, the mortar grout is injected under pressure into the space where the target ground is compressed and secured. In the process of forming the columnar modifier, the adjacent soil on the boundary face receives severe deformation and stress. As a result, The localized pressure zone is formed at the boundary between the soil and the soil at a certain distance, the stress distribution becomes regular, and the deformation becomes elastic so that the compaction of the soil occurs. In reality, however, .

The local soil compaction state is not a compaction state that is maintained permanently, but is extinguished through stress transfer to a portion where compaction does not occur with time, so that the compressive compaction effect of the object ground is not maintained constantly.

In the method of pressure-compaction injection of mortar grout to a target ground independently of the problem caused by the material properties of the mortar grout as described above, in the conventional method, in the conventional method, the mortar grout discharge port of the injection pipe, , The mortar grout is subjected to pressure compaction injection so that the ground is not broken by the pressure injection of the mortar grout but receives the plastic deformation and provides the space where the mortar grout reformer can be formed. Since the pressure injection per unit time of the grout is limited and a relatively small volume of the extrusion pump is used and a small amount of injection per unit time is applied at a low speed, the construction speed and construction efficiency are very poor, There is also.

In the conventional mortar grout pressure compaction injection method, the above-mentioned problems are caused by the fact that the mortar grout which pressurizes the ground to be improved expands in the ground, compresses the surrounding ground to form a space, and mortar grout This is because the process of forming the columnar reformer is a passive injection mechanism in which the range and shape of the mortar grout are expanded and occupied by the space depending on the characteristics of the target ground and the inherent stress conditions.

In addition, there is no particular problem in the case where the mortar grout pressure compaction injection mechanism is intended to increase the overall density of the soil target to be improved by the pressure compaction injection of the mortar grout and to thereby increase the ground support force. However, There is a problem that it is difficult to achieve the object of the present invention due to the causes of the problems listed above in the case where the columnar reformer is formed by injecting pressure into the ground in the ground,

Accordingly, a solution to the above problems is suggested, and as a method for substantially deriving the desired result, it is required to establish a ground foundation construction method by mortar grout pressure compaction injection.

The problems to be solved and solutions to the above problems occurring in the process of the conventional mortar grout pressure compaction injection method are as follows.

In order to simultaneously achieve the two purposes of the compression compaction effect of the target ground by forming the mortar grout under the pressure compaction injection into the target ground and the formation of the regular mortar grout reformer to secure the utility as the geotechnical structural material, It is necessary to mix mortar grout with a certain range of tack and flowable material characteristics and pressurize the ground of the target soil.

However, the main reason why the above-mentioned problems occur during the execution of the conventional mortar grout pressure compaction injection method is that the material characteristics and behavior characteristics of the mortar grout, which is applied in the conventional mortar grout pressure compaction injection method, This is due to the very different and heterogeneous nature of the soil.

In this mortar grout, which is applied in the conventional mortar grout pressure compaction injection method, the amount of coarse aggregate and fine aggregate, which are granular materials in the field, and the number of cement and liquid material, which are granular materials, It is supplied to the mixing plant as a weighing supply system for each material and supplied continuously.

In order to form a regular columnar reformer, the mortar grout pressure injection is applied to the entire boundary surface where the columnar reformer is pressurized and injected under the ground of the target ground, and the surrounding ground is compressed And it is necessary to secure space.

However, in the conventional mortar grout pressure compaction injection method, the compressive compaction effect of the surrounding soil body and the mortar grout column reformer expansion forming action on the entire interface between the outer circumferential surface of the mortar grout column reformer and the surrounding ground are equal Is that the mortar grout injection pressure is not uniformly distributed radially at the entire interface where the mortar grout compresses and compacts the ground.

This is due to the low fluidity material properties of the mortar grout component mixing ratio which is relatively low in the liquid grout mixing ratio under pressure in the ground.

The granular material composites, which occupy relatively large mixing ratios among the mortar grout constituent materials, push the surrounding ground in a compressed state inside the columnar reformer, and mainly transmit the force for expanding the space. The process of force transfer consists of the transfer of stress due to the bonding force and the cohesion due to the viscosity between the particles constituting the granular material composite. The expansion of the volume of the mortar grout column expander due to the stress transfer is radially uniformly expanded This is because it is a biased extension that has directionality rather than being achieved.

Therefore, in order to uniformly distribute the injection pressure of the mortar grout continuously pressurized and compacted in the ground of the target to be radially distributed on the entire interface with the surrounding ground, the injection pressure of the mortar grout continuously injected in the main- It is necessary to provide a method to transmit the injection pressure by the liquid grout and to expand the column size improving body composition standard so as to be distributed uniformly in the radial direction in all directions by the fluid pressure.

A method for predicting the transfer of the mortar grout injection pressure to the surrounding ground by the fluid pressure of the liquid grout and the main constituent expansion effect can be achieved by increasing the mixing ratio of the liquid grout at the mortar grout composition material mixing ratio However, in order to simultaneously achieve both the compressive compaction effect of the target soil and the formation of the shaped mortar grout column reformer at the same time in the mortar grout pressure compaction injection, it is directly related to the increase of the fluidity and the weakening of the bonding force between the constituent materials. Mortar grout was prepared by adjusting the viscosity and fluidity of the mortar grout, which is an injection material, by using an admixture so that the material properties and behavior characteristics of the grout can be adjusted within a predetermined range, Pressure mixture compaction into the target soil We need a plan.

In addition, in the process of injecting the mortar grout, which has a large amount of fluidity, into the ground of the target ground, it is formed in a space or a ground formed between the outer circumferential surface of the injection pipe and the excavation wall penetrating through the ground, There is a need for countermeasures and solutions to the problem that the mallet grout with high fluidity can be extracted or separated due to the existence of the flow path.

Hereinafter, problems to be solved and remedies for the problems occurring during the execution of the conventional mortar grout pressure compaction injection method as described above are summarized as follows.

First, the mortar grout was prepared by increasing the flowability of the mortar grout and adjusting the cohesion, viscosity and flowability of the mortar grout so that the viscosity and fluidity can be adjusted within a predetermined range, compared with the conventional method using the mortar grout. So that the mortar grout columnar reformer, in which the injection pressure of the mortar grout is formed by the fluid pressure of the liquid grout existing in a supersaturated state in the mortar grout, can be uniformly transferred and acted on the entire boundary surface in contact with the surrounding ground It is necessary to establish a plan to make the mallet grout columnar reformer to be formed uniformly in the radial direction so as to complete the standardized standard.

Second, in the process of injecting mortar grout under pressure compaction into the target ground, due to the difference in the depth characteristics of the target ground and the conditions that can accommodate the mortar grout, the mortar grout The flowability of the mortar grout to be injected under pressure can be easily adjusted and supplied at a time when it is necessary to perform pressure compaction injection by increasing the fluidity of the mortar grout columnar reformer, It is necessary to establish measures to prevent the fluctuation factors that are not suitable for quality requirements since the establishment.

Third, in the process of pressure injection of the mortar grout, in which the liquid grout is increased by the adjustment of the viscous composition, the injection material is prevented from escaping to the unnecessary area at the position and depth of the desired columnar reformer composition range, The mortar grout is limited to the ground around the outlet of the mortar grout so that the mortar grout can be injected in real time by increasing the range of real-time pressure injection in the target ground, It is necessary to establish a plan for pressure injection of mortar grout, and it is necessary to establish a plan that can greatly improve construction efficiency and construction economical efficiency compared with existing methods.

Fourth, the effect of compressive compaction of the surrounding ground on the entire interface between the Mortar grout column reformer and the surrounding ground formed by the conventional mortar grout pressure compaction injection method is localized, and the local compaction state is also a state of compaction And it is considered that the effect of the compressive compaction of the surrounding ground is not maintained. In order to cope with the problem that the effect of the compressive compaction of the surrounding ground is not retained due to the time lapse and the stress transfer to the part where compaction does not occur, It is necessary to establish a method to maintain the effect of compressive compaction on an equal footing and to maintain the ground foundation effect continuously.

DISCLOSURE Technical Problem The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a mortar grout reformer to be formed in the ground of a target ground by pressure compaction injection of mortar grout, And the effect of the soil improvement by the compression compaction of the target ground, which is another purpose of the mortar grout pressure compaction injection method, is effectively produced, and the effect thereof can be lasted permanently The purpose of the present invention is to provide a method of constructing an underground foundation by pressure compaction injection of a mortar grout in which a liquid grout is provided with an increased viscosity by using a mortar grout injection mechanism, What can happen in the underground foundation building process? Solving means for the above-mentioned problems presented as countermeasures and improvement of the half problem is as follows.

The existing mortar grout pressure damper injected injected pressurized mortar grout in the ground of the target ground is not uniformly extended in radial direction but is biased And the phenomenon that the Mortar Grout column reformer generates a local fracture on the interface between the surrounding ground and the Mortar grout column reformer is formed in irregular and atypical shape, And the phenomenon that the effect of the compressive compaction of the subsurface reformer, which is formed by injecting the mortar grout into the target soil with pressure compaction, and the surrounding ground compression compaction effect can not be assimilated due to the dissimilar material characteristics, and the phenomenon that the mortar grout column Improved The effect of the compressive compaction of the displaced ground in a short period of time is mainly due to the low fluidity of the mortar grout and the behavior characteristics of the existing mortar grout pressure compaction injection method This is the biggest factor.

In the case of a mixture of two materials, the mortar grout is divided into a granular material combination and a liquid grout which surrounds the granular material in a saturated state. The mixture of the granular material and the liquid grout is continuously mixed and produced in a mixed ratio. In this study, the effect of pressure injection of mortar grout on the volume of mortar grout in the ground and the surrounding ground were investigated. The reason for not acting uniformly on the entire boundary surface of the mortar grout is that the structure that the pressure for injecting the mortar grout into the target ground is transmitted to the interface with the surrounding ground is mainly composed of each particle of the granular material combination The interlocking edges and corners intertwine and transmit forces. Structure.

 The expansion of the mortar grout by such action is highly likely to proceed in a biased direction without acting uniformly in the radial direction based on the point where the mortar grout is injected under pressure, The grout column reformer is irregularly formed without expanding to the standardized standard, which is an inadequate result that does not secure its usefulness.

In order to solve the cause of irregular expansion in the process of pressure injection into the ground of the mallet grout with low fluidity due to its material characteristics and behavior, the amount of liquid grout in the mortar grout composition ratio is increased Mortar grout can be solved by pressure compaction injection in the ground.

In this case, the pressure applied to the soil by the mortar grout is greater than the amount of the liquid grout that can surround the granular material composite in a saturated state. The surplus liquid grout, which is additionally included, The granular rejoined material in the mallet grout that is being expanded and expanded is transmitted and expanded at the same time by the intergranular engaging, but the range of expansion is not limited to the range determined by the mortar grouting mechanism 20 according to the present invention , The expansion force of the mortar grout in the ground is uniformly applied to the surrounding ground and the entire boundary surface to uniformly compress the target ground and secure the space, and the mortar grout reformer is uniformized and homogeneous Therefore, the mortar grout with low fluidity can be used as the ground The grouting grout with the viscosity-regulated liquid grout is pressure-injected, but the expansion range of the mortar grout column reformer is limited to a predetermined standard and a range by an injection mechanism This is a more advantageous method for establishing a ground foundation that has utility.

The flowability of mortar grout, which is injected under pressure in the ground of the target ground, is supplied by continuous mixing and production of constituent materials according to the originally formulated standard. In the process of pressure compaction injection of mortar grout to the target ground, It is necessary to increase the fluidity of the mortar grout by a predetermined range to increase the pressure of the mortar grout, such as when a sudden increase in the ground reaction force or a harmful displacement to the adjacent structure is required, As in the compaction injection method, the coarse aggregate and the fine aggregate as the granular material, the cement as the granular material, and the blend water as the liquid phase material are simultaneously introduced into the mixing plant hopper as separate systems according to the predetermined blending ratio determined by the mixing design, In the system, the flowability of continuous mortar grout There is no method other than a method of appropriately increasing the amount of compounding water and the amount of cement per unit time or adjusting the amount of granular material per unit time to a proper amount as means for adjusting at any point. This is because the quality of the martal grout column- This is a factor that adversely affects the quality of underground foundation, which is the improvement of the column.

How to adjust the amount of material input for each supply system for a certain degree of liquidity adjustment should be decided by the test result according to the mixing design. It is an impossible matter.

The present invention relates to a method and apparatus for adjusting the viscosity of a mortar grout in which a liquid grout having a relatively larger content of liquid grout than that of a low-flow mortar grout used in a conventional mortar grout pressure compaction injection method, In the underground foundation construction method by the pressure compaction injection, the expansion range of the mortar grout occupies a space in the ground of the target ground in a state where the compression range is injected within a range limited by the mortar grout injection mechanism 20 according to the present invention, , The excess liquid grout other than that required for high strength and quality manifestation of the granular material combination in the liquid grout contained in the mortar grout passes through the extended range control permeable membrane 30 on the entire interface between the mortar grout columnar reformer and the surrounding ground And the penetration of pore water in the surrounding soil Since W-bonding, since the anti-bonding the columnar body is improved mortar grout is a valid way that can be permanently sustained in a compressed compaction effect of the surrounding ground and the effect and the surrounding soil in which the integrated value in the condition that the columnar body is improved target ground.

In order to solve the problem that the mortar grout with increased fluidity may be separated from the material due to the relatively large amount of liquid grout in the process of pressure compaction injection in the underwater or saturated soil, or dilution of the fire may occur, By adjusting the viscosity of mortar grout by using the admixture for underwater construction using mixed mortar grout by adding 0.25% ~ 0.5% of cement weight, it is possible to prevent the segregation of materials under mooring conditions, Establish and resolve measures to eliminate harmful factors to the underwater environment.

The solution to the measure for preventing the expansion of the expansion range to the predetermined standard range so as not to escape to the unnecessary part in the process of expanding the mortar grout with the liquid mixture grout having the increased viscosity is expanded by pressurizing the ground, The mortar grout injection mechanism 20 equipped with the extended permeability control permeable membrane 30 made of the same permeable inner tensile fabric is immersed in the depth range of the columnar reforming body of the target so that the mortar grout is pressure- It is solved by a plan.

When the mortar grout is injected into the ground by means of the mortar grout injection mechanism 20 equipped with the extended range control permeable membrane 30, the mortar grout is expanded to a zone other than the columnar modifier composition depth range and the composition standard The mortar grout is first filled in a wide depth range within the extended range control permeable membrane 30 and the mortar grout continuously injected with pressure from the injection tube incision part located inside gradually increases the extension range control permeable membrane 30 The boundary of the columnar reformer can be expanded by compressing and compressing the surrounding ground with uniform force at the boundary surface of the columnar reformer. Thus, the mortar grout column reformer can be formed. In this process, Extension range control Liquid grout necessary for high strength strength development inside permeable membrane (30) The excess liquid-phase grout other than that required for the high-strength manifestation of the mixed aggregate in the mortar grout constituent material is formed in the process of compressing the surrounding ground, (30) is infiltrated into the surrounding ground through pressure boundary penetration and solidified, so that the composite ground improvement that can maintain the compression compaction effect of the target ground for a long time is effectively achieved.

By the above-mentioned operation, the ground foundation construction method by the pressure compaction injection of the mortar grout, in which the viscous adjustment liquid grout is multiplied by the mortar grout injection mechanism according to the present invention, Since the grouting underground foundation and the compression ground are consolidated together, the mortar grout pressure compaction injection method pursues high quality mortar grout ground foundation and the purpose of improving the composite ground by the ground compression compaction effect can be practically achieved. It becomes an effective plan.

In the method of injecting the mortar grout into the ground by the mortar grout injection mechanism 20 equipped with the extended range control permeable membrane 30, the mortar grout injected under pressure in the depth range of the target is distributed in a wide depth range Since the range of expansion and expansion of the surrounding ground is limited within the range of columnar reforming body composition, it is possible to greatly increase the injection amount per unit time than the conventional method, thereby remarkably improving the construction efficiency and the construction economics This is a valid scheme.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a mallet grout columnar reformer to be formed in the ground of a target ground by pressure compaction injection of mortar grout, It is possible to sufficiently exhibit the utility of the columnar reforming material as a geotechnical structural material and to further improve the ground improvement effect caused by compression compaction of the target ground, which is another object of the mortar grout pressure compaction injection method, The purpose of the present invention is to provide an underground foundation construction method by pressure compaction injection of a mortar grout in which a liquid grout is formed by adjusting a viscosity using a mortar grout injection mechanism.

According to the above-mentioned contents and methods, a point-adjusted liquid grout using a mortar grout injection apparatus according to the present invention for realizing the purpose of constructing a foundation of high-quality mortar grout underground and improving the complex ground by the effect of compressive compaction of the ground, An underground foundation construction method by pressure compaction injection of a molten mortar grout has an injection pipe main body 21 having a tubular shape with a predetermined diameter and length; An injection tube cut-out portion 22 formed at an interval and in a predetermined number in the axial direction along the outer peripheral surface of the injection tube main body 21; And a lower portion of the injection tube main body 21 has an outer diameter equal to the inner diameter of the injection tube main body 21, A backflow preventing tube 23 made of a soft rubber to be joined; An extended range control permeable membrane (30) fixed to an upper outer peripheral surface of the injection tube main body (21) and made of a cylindrical permeable fabric; An injection tube 25 inserted into the upper inner surface of the backflow prevention tube 23; The upper portion of the injection tube main body 21 and the upper portion of the extended range control transmission membrane body 30 are tied together to form the upper end closing portion 31 of the extended range control permeable membrane body, The lower part of the control permeable membrane 30 is joined to the lower end of the expanded-range control permeable membrane, and the mortar grout injection mechanism 20 is used. Assembling and preparing a mortar grout injection mechanism 20 having the same configuration; In the mixing of the material to be injected into the mortar grouting mechanism 20, the granular material is mixed with the mixing plant hopper 11 in the form of a mixture aggregate (mag) in which a coarse aggregate (cag) and a fine aggregate (fag) , And the liquid grout (Lg) is continuously charged in the liquid grout continuous compound feeder (60) by a predetermined cement-to-water ratio and is continuously metered into the mixing plant hopper (11) Establishing a mallet grout continuous mix production and supply system by a supply system; Forming a perforation hole having a predetermined diameter in order to allow the mortar grout injection mechanism (20) to be positioned in the depth range of the target ground; Placing a mortar grout injection mechanism (20) in the perforation hole by connecting the mortar grout injection mechanism (20) to a pressure feed pipe (28) and allowing the mortar grout injection mechanism (20) to stay in a predetermined depth range; Injecting a mortar grout extruded from the extrusion pump 14 through the mortar grout injection mechanism 20 into the expanded range control permeable membrane body 30 to form a mortar grout columnar reformer and compressing the ground; The injection tube 25 is retracted from the mortar grout injection mechanism 20 by the reverse suction operation of the extrusion pump 14 when the underground pressure injection of the targeted mortar grout injection amount into the mortar grout injection mechanism 20 is completed Withdrawing; After the injection tube 25 is detached from the mortar grout injection mechanism 20, the mortar grout injected with pressure into the mortar grout injection mechanism 20 and the backflow prevention tube 23 are moved to the upper end closed- (31) so as to prevent the backflow of the pressurized mallet grout; The mallet grout columnar reformer formed in a compressed state inside the extended-range control-transmitting membrane element 30 is maintained in a composition standard and an uprightness, cured and cured, and at the same time, the extended-range control permeable membrane 30 The liquid grout penetrated into the surrounding ground is solidified together with the compression ground, forming a columnar reformer in which the mortar grout column reformer and the compressed ground are integrated, and pressure is injected into the ground of the target ground Mortal Grout is a water-soluble polymer thickener which is added at 0.25% ~ 0.5% of cement weight to maintain bonding and cohesion between the mortar grout constituent materials, to prevent material segregation underwater and to minimize soil and water environment hazards The degree of fluidity is determined by applying a sole cement mortar grout having a slump value ranging from 5 to 12 cm, Continuous mix production and supply of mortar grout is carried out in two systems of a liquid grout (Lg) blended with a feed system of a mixed aggregate (mag) preceding the volume combination of a coarse aggregate (cag) and a fine aggregate (fag) The quality control of the sill cement mortar grout production quality is based on the granularity of the aggregate (mag) due to the mixing ratio of the coarse aggregate (cag) and the fine aggregate (fag) (C / w) ratio of the liquid grout (Lg) is controlled by supplying the cement-water ratio (c / w) of the liquid grout Is controlled by the degree of saturation of the liquid grout (Lg) contained in the mixture aggregate (mag) by the relative adjustment of the amount of the magic material and the amount of the liquid grout (Lg).

As described above, the ground foundation construction method by the pressure compaction injection of the mortar grout in which the viscous adjustment liquid grout is multiplied by the mortar grout injection mechanism according to the present invention has the following effects.

First, according to the present invention, the mortar grout in which the liquid grout is exaggerated is pressure-injected into the ground so that the radial compressive compaction of the surrounding ground is supersaturated in the mortar grout when the mortar grout is injected under pressure into the ground. The molten grout is introduced into the molten grout so that the injection pressure of the molten grout acts as a fluid pressure to uniformly act radially on the boundary surface between the entire circumferential surface on which the mortar grout column reformer is formed and the surrounding ground, Is extended in a compressed state while maintaining meshing with each other, but its range is limited to a range determined by the extended-range control permeable membrane (30) and expanded at the front end surface, so that the position of the molten grout Radially homogeneous compression compaction and mortar The route consists of the extension is equal to the effect that the target substance is made to be structured body is formed in the ground and characters mortar grout, which is the main phase is the resultant improved with equivalent efficacy as standard the underground base body secured on the target soil.

 Second, since the present invention is made by a two-material supply system for continuously feeding a multal grout, a system for feeding two or more mulittal grout into a continuous feed system of a mixture aggregate and a continuous feed system of a liquid phase grout, It is necessary to increase the fluidity of the mortar grout by a predetermined range in accordance with the sudden increase of the ground reaction force and the occurrence of harmful displacement to the adjacent structure depending on the difference of the depth characteristics of the target ground and the conditions capable of receiving the mortar grout, It is possible to easily control the fluidity of the mortar grout injection material by adjusting the amount of the mixture aggregate input and the amount of the liquid grout continuously supplied at the same time to the mixing plant hopper at the required point of time and with the relative control of the amount of the mixture aggregate input and the amount of the liquid grout, The liquidity of The granular re-grout forming mortar grout column reformer maintains a state in which the liquid grout having a predetermined cement-water ratio is saturated until the curing curing is performed by the compression compacting, so that the quality fluctuation of the mortar grout column reformer The two-material feeder mortar grout continuous mixing production and supply system, which has been divided into the continuous feed system of the formulated aggregate and the continuous feed system of the liquid grout, can be divided into two groups according to the stratified structure of the stratum found during the preceding drilling, The flowability of the mortar grout can be easily adjusted at a necessary point by the position and the depth of the grout being injected into the ground.

 Third, the present invention is characterized in that the liquid grout contained in a supersaturated state in a mortar grout is formed by injecting pressure grooved mortar under pressure into the bottom of the columnar reforming body, Since the permeate is transmitted to the surrounding ground by the pressure and the pore water pressure existing in the pore of the surrounding ground is excluded, the surrounding ground is subjected to compression compaction in a state in which the liquid grout including the fire is penetrated into the interior. In the process of consolidating the mortar grout reformer Since the surrounding ground is cemented by the infiltrated liquid grout, the effect of consolidation of the mortar grout columnar reformer and surrounding grounds and the effect of compressive compaction of the surrounding ground can be maintained for a long time, The objective of complex improvement is to ensure effective compression compaction. Can be effectively achieved.

Fourthly, according to the present invention, since the mortar grout is injected under pressure by the mortar grout injection mechanism 20 equipped with the extended range control permeable membrane body 30 made of the permeable fabric, the granular material grout Is not deviated from the intended range of the columnar reformer zone and contains the liquid grout necessary for curing and solidification in the inner space of the extended range control permeable membrane (30) and is cured in the compression compaction state. The pressure compaction of the mortar grout The inner pressure of the compression-compaction state in the inner space of the expanded-range control permeable membrane 30 is maintained without being dissipated due to the clogging due to the backflow prevention tube 23, so that the conventional mortar grout pressure compaction injection It is possible to construct an underground foundation having a quality superior to that of the columnar reformer.

Fifth, according to the present invention, the mortar grout is pressurized and compacted in the target ground by the mortar grout injection mechanism 20 equipped with the extended range control permeable membrane 30, and by the structure of the mortar grout injection mechanism 20, Since the composition of the pressure injection and columnar reformer itself is made from the bottom to the top of the range of the depth of the target and the composition standard and upright state can be maintained until the curing and consolidation of the columnar reformer, So that it is possible to create an output that assures the quality and utility of the pile body.

 Sixth, since the mortar grout is distributed in the full depth range of the target ground by the mortar grout injection mechanism 20 equipped with the extended range control permeable membrane 30, the mortar grout is injected at the front surface of the target depth range Since the expansion range of the mortar grout is limited by the extended range control permeable membrane 30 within the range of the columnar reforming body composition standard, the target depth range is divided at predetermined intervals, The injected amount per unit time can be greatly increased as compared with the conventional method in which the injection is performed in a divided manner, so that the efficiency of construction and the economical efficiency of construction can be remarkably improved.

 Seventh, the present invention uses mallet grout adjusted for viscosity, so that even when mortar grout is pressure-fed underwater, the liquid grout and granular material mixed in the mortar grout retain adhesiveness and aggregation with each other, The effect as a construction method which is particularly effective in the gap filling work which is not leached and needs fluidity, construction which should consider the influence on the soil or underwater environment due to material separation and so on, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a systematic diagram showing a high-flow mortar grout continuous compounding supply system according to the present invention;
FIG. 2 is a graph showing the standard mixing ratio of mortar grout based on the columnar compactor according to the present invention,
3 is a view showing an injection pipe main body structure of a mortar grout injection mechanism according to the present invention,
4 is a view illustrating a structure in which a backflow preventive tube of a mortar grout injection mechanism according to the present invention is inserted into an injection tube main body,
FIG. 5 is an exemplary view showing a structure in which the injection tube of the mortar grouting injection mechanism according to the present invention is inserted into the upright injection tube main body and the backflow prevention tube,
6 is a view illustrating a structure of a mortar grout injection mechanism in which an extension section control permeable membrane is mounted on a body of an upright injection tube of a mortar grouting system according to the present invention,
7 is a view illustrating a process in which a mortar grout is injected under pressure into the ground of a target by a mortar grout injection mechanism according to the present invention.
8 is a view illustrating an example in which the shape and use of the mortar grout reformer are variously applied according to the processing form of the expanded zone control permeable membrane of the mortar grout injection mechanism according to the present invention, B is an example showing a top base construction example, and c is an example showing a mat foundation building example.
FIG. 9 is a view illustrating a step in which a ground foundation construction method is carried out by the mortar grout pressure compaction injection according to the present invention, Drawing, ⓒ Injection of underground pressure of mortar grout, ⓓ Injection tube of injection-completed ball and draw-out tube.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The mortar grout injection mechanism 20 according to the present invention comprises: an injection pipe main body 21 of a tubular shape having a predetermined diameter and length; An injection tube cut-out portion 22 formed at an interval and in a predetermined number in the axial direction along the outer peripheral surface of the injection tube main body 21; And a lower portion of the injection tube main body 21 has an outer diameter equal to the inner diameter of the injection tube main body 21, A backflow preventing tube 23 made of a soft rubber to be joined; An extended range control permeable membrane (30) fixed to an upper outer peripheral surface of the injection tube main body (21) and made of a cylindrical permeable fabric; An injection tube 25 inserted into the upper inner surface of the backflow prevention tube 23; The upper portion of the injection tube main body 21 and the upper portion of the extended range control transmission membrane body 30 are tied together to form the upper end closing portion 31 of the extended range control permeable membrane body, The lower portion of the control permeable membrane body 30 is bound and composed of the lower end closing portion 32 of the extended range control permeable membrane.
In addition, the method of constructing the ground foundation by the pressure compaction injection of the mortar grout in which the viscous adjustment liquid grout is formed by using the mortar grout injection mechanism according to the present invention comprises: assembling and preparing the mortal grout injection mechanism 20; In the mixing of the material to be injected into the mortar grouting mechanism 20, the granular material is mixed with the mixing plant hopper 11 in the form of a mixture aggregate (mag) in which a coarse aggregate (cag) and a fine aggregate (fag) , And the liquid grout (Lg) is continuously charged in the liquid grout continuous compound feeder (60) by a predetermined cement-to-water ratio and is continuously metered into the mixing plant hopper (11) Establishing a mallet grout continuous mix production and supply system by a supply system; Forming a perforation hole having a predetermined diameter to allow the mortar grout injection mechanism (20) to be positioned in a depth range of a target ground; Placing a mortar grout injection mechanism (20) in the perforation hole by connecting the mortar grout injection mechanism (20) to a pressure feed pipe (28) and allowing the mortar grout injection mechanism (20) to stay in a predetermined depth range; Injecting a mortar grout extruded from the extrusion pump 14 through the mortar grout injection mechanism 20 into the expanded range control permeable membrane body 30 to form a mortar grout columnar reformer and compressing the ground; The injection tube 25 is retracted from the mortar grout injection mechanism 20 by the reverse suction operation of the extrusion pump 14 when the underground pressure injection of the targeted mortar grout injection amount into the mortar grout injection mechanism 20 is completed Withdrawing; After the injection tube 25 is detached from the mortar grout injection mechanism 20, the mortar grout injected with pressure into the mortar grout injection mechanism 20 and the backflow prevention tube 23 are moved to the upper end closed- (31) so as to prevent the backflow of the pressurized mallet grout; The mallet grout columnar reformer formed in a compressed state inside the extended-range control-transmitting membrane element 30 is maintained in a composition standard and an uprightness, cured and cured, and at the same time, the extended-range control permeable membrane 30 The liquid grout penetrated into the surrounding ground is solidified together with the compacted compaction ground to form a columnar reformer in which the mortar grout columnar reformer and the compressed ground are integrated.
In the process of constructing the ground foundation by the pressure compaction injection of the mortar grout in which the viscous adjustment liquid grout is multiplied by the above-described components and the mortar grout injection mechanism according to the present invention, The aggregate (mag) contains the liquid grout (Lg) required for curing and solidification, is cured in the state of being compressed within the expanded-range control permeable membrane (30), and the cement is progressed to form the column- Surplus liquid grout (Lg) other than the liquid grout (Lg) required for curing and solidification of the aggregate (mag) penetrates and cures to the surrounding ground which is compressed and bound to the boundary surface of the expanded-range control permeable membrane body 30, In this study, an effective ground foundation is constructed in which the mallet grout column reformer is integrated with the surrounding ground that is compacted and compacted.
Also, the range in which the mortar grout is expanded in the target ground by the pressure compaction injection of the mortar grout by the mortar grouting mechanism 20 is limited to the internal space according to the standard of the extended range control permeable membrane 30, Since the expansion and the compression of the surrounding ground are distributed simultaneously in the entire depth range of the target ground, the waiting time for ground plastic deformation to be considered in the stepwise divisional injection of the local range and thus the restriction requirement of the mortar grout pressure injection per unit time Thereby improving the efficiency of construction and improving the economical efficiency of construction.
The process of forming the mortar grout column reformer for the pressure compaction injection of the mortar grout by the mortar grout injection mechanism 20 is performed by a mortar grout injected into the internal space of the expansion range control permeable membrane body 30 In the process of continuously pressurizing and compressing the mortar grout into the inner space of the extended range control permeable membrane body 30, the injection pressure of the mortar grout By the fluid pressure of the liquid grout present in the supersaturated state in the mortar grout, it replaces the pore pressure of the surrounding ground which is in contact with the extended-range control permeable membrane (30) And at the same time, the granular re-grout contained in mortar grout is used as a liquid phase for curing and solidification The expansion range is extended and progressed by the intergranular engagement with the inclusion of the expanding range control permeable membrane 30, but the extension standard range progresses progressively over the target depth range cross section within the range controlled by the extended range control permeable membrane 30 Process.
Mortar grout, in which the mortar grout reformer is formed and pressure is injected into the ground of the target so as to compress and compress the surrounding ground, is prepared by adding 0.25% ~ 0.5% of water-soluble polymer thickener to the mortar grout constituent materials The mortar grout having a slump value in the range of 5 to 12 cm is applied so that the cohesion is maintained and the deterioration of the material is prevented even underwater conditions and the harmful factors to the soil and the underwater environment are minimized, Continuous mix production and supply of the grout is carried out by supplying a feed system of a mixture aggregate (mag) preceding the volume combination of the coarse aggregate (cag) and the fine aggregate (fag) and a feed system of the liquid aggregate (Lg) continuously produced by a predetermined cement- (2) Feeding system of continuous system According to the continuous mixing production supply system, the control of the mortar grout fluidity is carried out by mixing aggregate (mag) supplied to the mixing plant hopper And the relative adjustment of the input amount and the amount of the liquid grout (Lg).
When the mortar grout, in which the liquid grout is multiplied by the mortar grout injection mechanism 20 equipped with the extended range control transmission membrane 30, is pressure-fed into the ground of the target ground, the granular material grout in the mortar grout constituent material, And the compressed liquid grout is cured in the inner space of the extended-range control permeable membrane 30 to form a ground foundation, and the surplus liquid grout is formed in the vicinity of the compression- The pressure is infiltrated into the ground and solidified to consolidate the mortar grout underground foundation and the compacted and consolidated ground.
The shape and size of the extended-range control permeable membrane 30 mounted on the mortar grout injection mechanism 20 may be varied according to the size and shape of the desired underground foundation material and may be used to construct deep pile foundation, Building, building heat base. It can be applied to various types of foundation foundation such as mat foundation construction.
In addition, in the course of performing the entire process as described above, the real time measurement situation of the mortar grout formulation management, the mixing quality, the result of the piercing work, the real time construction status of the mortar grout, And a step of performing management by a computer are executed in parallel.
The procedure and method of performing the ground foundation construction by pressure compaction injection of the mortar grout in which the liquid grout is formed with the point composition adjustment using the mortar grout injection mechanism according to the present invention will be described in detail as follows.
In the mixing of the material to be injected into the mortar grout injecting mechanism 20, the granular material is supplied to the mixing plant hopper 11 in the form of a mixed aggregate (mag) in which the coarse aggregate (cag) and the fine aggregate (fag) And the liquid grout Lg is continuously stirred and metered in the liquid grout continuous compound feeder 60 by a predetermined cement-water ratio to be continuously metered into the mixing plant hopper 11. The two- The construction of the mortar grout continuous mix production and supply system is constructed by the system as shown in Fig.
As shown in FIG. 1, in the mixing of the materials constituting the mortar grout, the granular material is mixed with the mixing plant hopper 11 (11) in the form of a mixed aggregate (mag) in which a coarse aggregate (cag) And the liquid grout Lg is continuously mixed in the liquid grout continuous compound feeder 60 by a predetermined cement-water ratio and continuously fed to the mixing plant hopper 11, The control of the mortar grout fluidity can be easily accomplished by adjusting the amount of the mixture aggregate (mag) and the liquid grout (Lg) relative to the feed system of the continuous feeding of the two systems according to the mixing supply system.
The reason why the quality change of the mortar grout reformer is not caused by relatively adjusting the amount of the mixture aggregate (mag) and the liquid grout (Lg) in the mortar grout continuous compounding production system is that the mortar grout reformer The quality and the strength of the sieve were determined by measuring the particle size of the aggregate (mag) by the mixing ratio of the cag and the fine aggregate (fag) and the cement - water ratio ), The fluidity of the mortar grout varies depending on the degree of saturation of the liquid grout (Lg) contained in the mixed aggregate (mag) under the condition that the cement-water ratio of the liquid grout (Lg) In the case where the molten grout having high fluidity is produced by increasing the mixing amount of the liquid grout (Lg), when pressure compaction is injected into the ground, excess liquid grout Although the aggregate (mag), which is a combination of cag and fine aggregate, is cemented in a state of containing liquid grout necessary for cementation in a compressed state even if pressure is infiltrated into the subsoil, the quality of mortar grout column improver Because no fluctuation occurs.
In the case of pressurized compaction injection of mortar grout in which the liquid grout is multiplied by the pressure in the ground of the target soil, the material contained in the liquid grout (Lg) due to the material characteristic of high fluidity in the saturated ground condition, underground water flow passage, It is necessary to adjust the viscosity of the mortar grout formulation in order to minimize or prevent the phenomenon that the fire is leached or diluted or the constituent materials of the mortar grout are separated from each other.
Herein, the mortar grout according to the present invention is prepared by adjusting the viscosity of the mortar grout by adding the water-soluble polymer thickener to the mortar grout by adding 0.25% to 0.5% of the cement weight to the mortar grout using the underwater construction admixture .
FIG. 2 is a graph showing the relationship between the viscosity of a water-soluble polymer thickener and the viscosity of a mortar grout reformer according to the required strength of a mortar grout reformer in a foundation foundation construction method by pressure compaction injection of a mortar grout having a viscosity adjusted liquid grout using the mortar grout injection apparatus according to the present invention Table showing examples of standards in which mortar grout having a slump value of 12 cm is added by adding 0.5% of cement weight. Mortar grout, which is adjusted by the method using such an underwater construction admixture, Even if the liquid grout and granular material mixed in the mortar grout keeps tackiness and aggregation with each other, it is not leached in the material separation or underwater conditions, and it is difficult to fill the void filling work, material separation and soil or underwater environment Construction that should consider the influence, forming columnar reformer in the water stream It is possible to exert an effect as a construction method particularly effective in a construction to be performed.
In the step of forming the perforation hole having a predetermined diameter in order to set the mortar grout injection mechanism 20 in the depth range of the target ground, the mortar grout injection mechanism 20 according to the present invention is constructed such that, So that the whole mortar grout injection mechanism 20 is introduced after the perforation of the entire perforation casing.
In the step of assembling and preparing the mortar grout injection mechanism 20, the mortar grout injection mechanism 20 comprises a tube-shaped injection tube main body 21 having a predetermined diameter and length; An injection tube cut-out portion 22 formed at an interval and in a predetermined number in the axial direction along the outer peripheral surface of the injection tube main body 21; And a lower portion of the injection tube main body 21 has an outer diameter equal to the inner diameter of the injection tube main body 21, A backflow preventing tube 23 made of a soft rubber to be joined; An extended range control permeable membrane (30) fixed to an upper outer peripheral surface of the injection tube main body (21) and made of a cylindrical permeable fabric; An injection tube 25 inserted into the upper inner surface of the backflow prevention tube 23; The upper portion of the injection tube main body 21 and the upper portion of the extended range control transmission membrane body 30 are tied together to form the upper end closing portion 31 of the extended range control permeable membrane body, The lower portion of the control permeable membrane 30 is connected to the expansion range control permeable membrane lower end closing part 32. The injection pipe main body 21 is made of a flexible material capable of standing upright in the perforated wall As shown in FIG. 3, the main body 21 of the injection tube is divided into three equal parts by the method of joining joints so as to secure the entire depth range of the mortar grout reformer. And the entire outer circumferential surface except for a certain portion of the lower end outer circumferential surface of the expanded-region control permeable membrane upper end closing portion 31 located at the upper outer circumferential surface thereof is cut axially with an appropriate gap width to make the injection tube cut-out portion 22 , The lower end of the incision cuts the portion connected to the injection tube main body 21 so that the injection tube incision portion 22 is pushed out of the injection tube main body 21 by pressure injection of the mortar grout.
As shown in FIG. 4, on the inner surface of the upper portion of the injection tube main body 21 in which the injection tube cut-out portion 22 is completed, an anti-backing tube made of a soft rubber material having an outer diameter equal to the inner diameter of the injection tube main body 21 23 is inserted into the injection tube main body 21, the length of which is about 1.0 to 1.5 m, the back-off preventing tube cut-out portion 24 is formed in the axial direction or diagonal direction from the center to the lower end of the length, And the inner surface of the injection tube main body 21 and the outer surface of the backflow prevention tube 23 in the range where the extended range control permeable membrane upper end closing portion 31 located at the upper portion of the injection tube main body 21 is located And are joined together.
When the connection between the injection tube main body 21 and the backflow prevention tube 23 is completed, the injection tube main body 21 and the injection tube main body 21 are inserted into the cylindrical extended range control permeable membrane body 30 having an outer diameter equal to the mortar grout columnar reformer- The upper end of the injection tube main body 21 and the upper end of the cylindrical extended range control transmitting membrane body 30 are engaged to complete the extended range control permeable membrane upper end closing portion 31 , The lower end of the injection tube main body 21 and the lower end of the extended range control permeable membrane 30 are closed together to complete the extended range control permeable membrane lower end closing part 32. [
The expanded-range control permeable membrane 30 can be fabricated into various types of cylindrically-shaped fabrics according to the size and shape of the mortar grout columnar reformer to be formed. FIG. 8 is a cross- (A) is an example showing a pile foundation construction example, (b) is an example showing a pile foundation construction example, (b) is an example of a pile foundation construction example, Is an example showing a top base construction example, and c is an example showing a mat foundation construction example.
The backflow prevention tube 23 is adhesively joined to the upper end of the inner circumferential surface of the injection tube main body 21 and inserted into the extended range control permeable membrane body 30, In the combined assembly in which the control for the lower end closing portion 32 of the control permeable membrane is completed, the injection tube 25 is inserted into the backflow prevention tube 23 by about 2 to 3 m and the remaining portion is exposed from the mortar grouting mechanism 20 The injection tube 25 uses a tube which is shrinking and inflatable and has a predetermined internal pressure and a tensile force.
In the step of connecting the mortar grout injection mechanism 20 to the perforation hole by connecting the mortal grout injection mechanism 20 to the feed pipe 28 and allowing the mortar grout injection mechanism 20 to be positioned within a predetermined depth range, The grout injecting mechanism 20 is connected to the press-feeding pipe connecting port 27 of the injection tube 25 exposed at the upper end thereof and penetrates into the space inside the casing penetrating into the ground by the preceding perforation , When the mortar grout injection mechanism 20 is set in the predetermined depth range of the target ground, the casing penetrated into the ground by the preceding drilling operation is pulled out and only the mortar grout injection mechanism 20 remains in the predetermined depth range of the target ground do.
The mortar grout extruded from the extrusion pump 14 through the mortar grout injection mechanism 20 is injected into the expanded range control permeable membrane body 30 to form a mortar grout columnar reformer, The molten grout extruded from the extrusion pump 14 is injected into the mortar grouting mechanism 20 through the injection tube 25 connected to the pressure tube pipe connection hole 27 so that the molten grout is preferentially injected into the injection pipe main body 21 The molten grout is filled in the inner space and spreads from the lower end of the injection tube cut-out portion 22 to the molten grout pressure injection by the continuous mortar grout pressure injection, The expanded range control permeable membrane 30 is inflated to fill the mortar grout.
The mortar grout pushed out of the inner space of the injection tube main body 21 by the continuous pressure injection of the mortar grout gradually flares outward from the lower end to the upper end of the injection tube cutout portion 22, The mallet grout filled in the outside of the control permeable membrane body 30 and the expanded range control permeable membrane body 30 compresses and expands the ground by the equal pressure at the entire interface with the surrounding ground in contact with the extended range control permeable membrane body 30.
The reason why the injection tube 25 is not pushed out of the mortar grouting mechanism 20 due to the injection reaction force in the process of pressure injection into the mortar grout injection mechanism 20 is that the mortar grout, Since the injection tube 25 is squeezed on the inner surface of the backflow preventive tube 23 by the grout pressure output and the expansion range control permeable membrane body 30 is continuously pressurized in the interface with the constituent material of the mortar grout The mixed aggregate (mag) in which the coarse aggregate (cag) and the fine aggregate (fag) are mixed at a predetermined ratio contains the liquid grout (Lg) necessary for curing and cementing, Extends to a range of diameter (D) of the expanded-range control permeable membrane (30) manufactured according to the standard for forming the mortar grout reformer, Excess liquid grout Lg other than the liquid grout Lg necessary for curing and consolidation of the agglomerate aggregate (mag) passes through the expanded-range control permeable membrane body 30 and pressure-permeates into the ground of the target soil undergoing compression compaction .
The mallet grout columnar reformer filling the inside of the extended-range control permeable membrane body 30 has the shape and size of the entire specimen while the diameter D of the extended-range control permeable membrane 30 is secured from the lower end to the upper end So that the range of the compaction of the soil compression due to the pressure compaction injection of the mortar grout occurs simultaneously on the contact surfaces of the entire outer circumferential surface and the surrounding ground of the extended range control transmission membrane 30. Therefore, It is possible to increase the injection amount of mortar grout per unit time without being disturbed by the restriction condition of distributing a small amount at a low speed in consideration of the waiting time of the plastic deformation in the ground, And the effect of improving the economical efficiency of construction is very large.
As a result of this process, the extended-range control permeable membrane 30 is extended to a cylindrical shape up to the fabrication standard range to secure the formation standard of the mortar grout column reformer to be formed. In this state, the mortar grout The compounded aggregate (mag) in the constituent material contains the liquid grout (Lg) necessary for curing and solidification and forms a columnar reformer inside the expanded-range control-transmitting membrane body (30) in a compressed state, and the excess liquid grout (Lg ) Is completed in the state where it is infiltrated into the compression compaction surrounding ground.
The injection tube 25 is retracted from the mortar grout injection mechanism 20 by the reverse suction operation of the extrusion pump 14 when the underground pressure injection of the targeted mortar grout injection amount into the mortar grout injection mechanism 20 is completed In the drawing step, when the injection for the prescribed injection amount is completed, the extrusion pump 14 is switched to the reverse suction operation and operated three to five times to cause shrinkage of the injection tube 25 to be connected to the feed tube 28 The injection tube 25 is pulled out and separated from the mortar grout injection mechanism 20 to complete the mortar grout injection operation.
After the injection tube 25 is detached from the mortar grout injection mechanism 20, the mortar grout injected with pressure into the mortar grout injection mechanism 20 and the backflow prevention tube 23 are moved to the upper end closed- When the injection tube 25 is separated from the mortar grout injection mechanism 20, the expanded expanded controllable permeable membrane body 30 is expanded when the injection tube 25 is separated from the mortar grout injection mechanism 20, The injection tube 25 is detached by the inner pressure of the mortar grout, which is filled in the compressed state, and the molten grout injected with pressure into the upper end of the removed injection pipe main body 21 tends to be pulled out. In the mortar grout, the back-off preventing tube cut-out portion 24 is contracted or curled inside the back-off preventing tube 23, and the mortar grout is pulled out from the inside of the back- It is not.
The mallet grout columnar reformer formed in a compressed state inside the extended-range control-transmitting membrane element 30 is maintained in a composition standard and an uprightness, cured and cured, and at the same time, the extended-range control permeable membrane 30 The liquid grout penetrated into the surrounding ground is solidified together with the compacted compaction ground to form a columnar reformer in which the mortar grout columnar reformer and the compressed peripheral ground are integrated, D) standard, the mortar grout, which is trapped in the interior, is cured and solidified in a state of forming a columnar reformer corresponding to the plastic deformation resistance reaction force and earth pressure of the surrounding ground, (30) is subjected to plastic deformation at the boundary surface in the course of pressure injection of mortar grout, As a result, the mortar grout columnar reformer and the surrounding ground are integrally consolidated with the extended-range control permeable membrane 30 at the interface, so that the mortar grout column reformer composition And the ground foundation construction method which can effectively and effectively improve the ground by the compression of the surrounding ground is completed.
Maintaining the formation standard and the uprightness of the mortar grout column reformer up to the point when the mortar grout columnar reformer and surrounding grounds are integrated into a solid body through curing and cementing process is carried out from the injection pipe main body 21 to the extended range Is held by the injection tube cutout 22 and the injection tube main body 21 and the extended range control permeable membrane 30, which are pushed radially into the inner space of the control permeable membrane 30 and trapped in the mortar grout.
In the course of executing all the processes as described above, measurement means capable of real-time management and recording of mortar grout formulation management, real-time measurement situation of mixing quality, piercing work results, mortar grout real time construction status, The method of managing construction quality and construction management items in the ground foundation construction method by pressure compaction injection of mortar grout, in which the liquid grout is multiplied by using the mortar grout injection mechanism in the present invention, 9, various measuring devices 41 for collecting necessary data in the entire construction process in which the columnar reformer is formed by the pressure compaction injection of mortar grout, and these data are collected and converted into computer input signals and transmitted A 20-channel data collecting device 40 for receiving 20-channel data from the 20-channel data collecting device 40, It represents the schematic view showing the data required by the management items is managed by the general notebook computer 42 to manage automatically counted.
The mortar grout composition management is performed by a two-material feed mortar grout continuous mix production system. In the two-material feed mortar grout continuous mix production and supply system as shown in FIG. 1, the mixing amount of aggregate (mag) And the cement-water ratio of the liquid grout Lg continuously supplied and produced in the liquid grout continuous compound feeder 60 can be controlled by the relative adjustment of the amount of the blended water in the liquid grout continuous compound feeder 60 The real-time input amount measurement value and the real-time input amount measurement value of the cement are collected by the respective measurement device 41 and converted into a computer input signal by the 20-channel data collection device 40 and displayed and automatically recorded in the notebook computer 42, Continuous mix production of grout (Lg) The real-time display and automatic record management in the production supply real time cement - A situation, the total production volume, mixing plants, such as hopper 11 and real time feed to the metering press.

The results of the piercing work and the injection conditions for the injection pier are the same as those of the above system. Based on the data collected from the mortar grout pier system on the chart showing the ground information obtained at the piercing work, The mallet grout column improvement status, injection load amount, etc. are displayed and automatically recorded according to the condition of injection molding.

The preferred embodiments described in the specification of the present invention are intended to be illustrative, not limiting, and the scope of the present invention is indicated by the appended claims, and all modifications that come within the meaning of the claims are included in the present invention. .

11: mixing plant hopper
12: Continuous mixed discharge auger
13: Pump hopper
14: Extrusion pump
20: mortar grouting device
21: injection tube main body
22: injection tube incision
23: Tightening prevention tube
24: Non-backlash tube incision
25: injection tube
26: injection tube incision
27: Piping tube connection
28:
30: Extended zone control permeable membrane
31: Expansion zone control permeable membrane upper end closing part
32: Expansion zone control permeable membrane lower end closing part
40: 20 channel data acquisition device
41: Measuring device
42: notebook computer
60: Continuous mixer for liquid grout
adm: Other admixtures
cag: Coarse aggregate
cem: cement
D: Expansion zone control Transmission membrane diameter
fag: fine aggregate
Lg: Liquid grout
mag: combination aggregate
wat: number of ingredients

Claims (8)

delete An injection tube main body 21 of a tubular shape having a predetermined diameter and length;
An injection tube cut-out portion 22 formed at an interval and in a predetermined number in the axial direction along the outer peripheral surface of the injection tube main body 21;
And a lower portion of the injection tube main body 21 has an outer diameter equal to the inner diameter of the injection tube main body 21, A backflow preventing tube 23 made of a soft rubber to be joined;
An extended range control permeable membrane (30) fixed to an upper outer peripheral surface of the injection tube main body (21) and made of a cylindrical permeable fabric;
An injection tube 25 inserted into the upper inner surface of the backflow prevention tube 23;
The upper portion of the injection tube main body 21 and the upper portion of the extended range control transmission membrane body 30 are tied together to form the upper end closing portion 31 of the extended range control permeable membrane body, The lower portion of the control permeable membrane 30 is joined to the lower end of the extended range control permeable membrane body by the mortar grouting mechanism 20 composed of the lower end closing mechanism 32. The viscous adjustment liquid grout is subjected to pressure compaction in the mortar grout, As a basic construction method,
Assembling and preparing the mortar grout injection mechanism 20;
In the mixing of the material to be injected into the mortar grouting mechanism 20, the granular material is mixed with the mixing plant hopper 11 in the form of a mixture aggregate (mag) in which a coarse aggregate (cag) and a fine aggregate (fag) , And the liquid grout (Lg) is continuously charged in the liquid grout continuous compound feeder (60) by a predetermined cement-to-water ratio and is continuously metered into the mixing plant hopper (11) Establishing a mallet grout continuous mix production and supply system by a supply system;
Forming a perforation hole having a predetermined diameter to allow the mortar grout injection mechanism (20) to be positioned in a depth range of a target ground;
Placing a mortar grout injection mechanism (20) in the perforation hole by connecting the mortar grout injection mechanism (20) to a pressure feed pipe (28) and allowing the mortar grout injection mechanism (20) to stay in a predetermined depth range;
Injecting a mortar grout extruded from the extrusion pump 14 through the mortar grout injection mechanism 20 into the expanded range control permeable membrane body 30 to form a mortar grout columnar reformer and compressing the ground;
When the underground pressure injection of the target mortar grout injection amount into the mortar grout injection mechanism 20 is completed, the injection tube 25 is retracted by the reverse suction operation of the extrusion pump 14 to be separated from the mortar grout injection mechanism 20 ;
After the injection tube 25 is detached from the mortar grout injection mechanism 20, the mortar grout injected with pressure into the mortar grout injection mechanism 20 and the backflow preventing tube 23 are moved to the upper end of the extended range control permeable membrane top Preventing the backflow of the pressurized mallet grout occluded in the inner space of the closing part (31);
The mallet grout columnar reformer formed in a compressed state inside the extended-range control-transmitting membrane element 30 is maintained in a composition standard and an uprightness, cured and cured, and at the same time, the extended-range control permeable membrane 30 The liquid grout penetrated into the surrounding ground is solidified together with the compacted compaction ground to form a columnar reformer in which the mortar grout columnar reformer and the compressed ground are integrated,
Mortar grout, in which the mortar grout reformer is formed and pressure is injected into the ground of the target so as to compress and compress the surrounding ground, is prepared by adding 0.25% ~ 0.5% of water-soluble polymer thickener to the mortar grout constituent materials The mortar grout having a slump value in the range of 5 to 12 cm is applied so that the cohesion is maintained and the deterioration of the material is prevented even underwater conditions and the harmful factors to the soil and the underwater environment are minimized, Continuous mix production and supply of the grout is carried out by supplying a feed system of a mixture aggregate (mag) preceding the volume combination of the coarse aggregate (cag) and the fine aggregate (fag) and a feed system of the liquid aggregate (Lg) continuously produced by a predetermined cement- (2) Feeding system of continuous system According to the continuous mixing production supply system, the control of the mortar grout fluidity is carried out by mixing aggregate (mag) supplied to the mixing plant hopper And the amount of liquid grout (Lg) is controlled by relative adjustment of the amount of the molten grout. 3. The method of claim 2,
In the step of forming the mortar grout column reformer, the aged aggregate (mag) contained in the mortar grout contains liquid grout (Lg) necessary for curing and solidification, is restrained inside the expanded range control permeable membrane body 30 Curing and consolidation proceed in a compaction state to form a columnar reforming material and excess liquid grout Lg other than the liquid grout Lg necessary for curing and solidifying the aggregate aggregate (mag) The mortar grout pouring apparatus comprising the mortar grout pouring apparatus characterized in that the mortar grout paddle reformer composed of a regular shape is integrated with the surrounding ground which is compacted and consolidated, Construction of Underground Foundation by Pressure Compaction Injection of Mortar Grout with Adjusted Liquid Grout. 3. The method of claim 2,
Since the expansion range of the mortar grout and the compaction range of the surrounding ground are simultaneously performed in the full depth range of the target ground by the mortar grout pressure injection by the mortar grout injection mechanism 20, The viscosity of the mortar grout is adjusted by the pressure injection of the mortar grout so that the limitation of the mortar grout pressure injection amount per unit time is relaxed. Construction of Underground Foundation by Pressure Compensation Injection of Mortar Grout with Liquid Grout. delete delete delete 3. The method of claim 2,
Wherein a variety of shapes and specifications of the mortar grout column reformer are formed according to the shape and size of the extended range control permeable membrane body 30 mounted on the mortar grout injection mechanism 20. Construction of Underground Foundation by Pressure Compensation Injection of Mortar Grout with Liquid Grout.

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