KR101848732B1 - high liquidity mortar grout pile composition method and it's device for implementing - Google Patents

high liquidity mortar grout pile composition method and it's device for implementing Download PDF

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Publication number
KR101848732B1
KR101848732B1 KR1020150107937A KR20150107937A KR101848732B1 KR 101848732 B1 KR101848732 B1 KR 101848732B1 KR 1020150107937 A KR1020150107937 A KR 1020150107937A KR 20150107937 A KR20150107937 A KR 20150107937A KR 101848732 B1 KR101848732 B1 KR 101848732B1
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South Korea
Prior art keywords
grout
mortar grout
mortar
permeable membrane
range control
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KR1020150107937A
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Korean (ko)
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KR20150110436A (en
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강종호
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강종호
(주)어스이엔지
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/26—Compacting soil locally before forming foundations; Construction of foundation structures by forcing binding substances into gravel fillings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/28—Stressing the soil or the foundation structure while forming foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil

Abstract

In particular, the present invention relates to an injection mechanism for injecting pressurized grouting material of high fluidity mortar into the ground and constructing an underground foundation using the same. More particularly, the present invention relates to an injection mechanism for injecting pressure grout into molten grout, In the process of forming the main mortar grout reformer, it is possible to simultaneously expand the mortar grout to the surrounding ground in the axial cross section within the depth of the columnar reformer, thereby improving the construction efficiency and construction economics, and the expansion range of mortar grout The injection mechanism is designed so that the columnar reformer controlled by the columnar reforming body composition standard is formed and standardized and the columnar reformer can be formed even after the mortar grout columnar reformer formed in the ground of the target is solidified. This is a method for realizing the construction, Mortar grout injection mechanism and underground foundation building method according to the high fluidity mortar grout pressure injection using the same according to the name of the main phase is improved due to the mortar grout injection pressure body composition and this This is a practical solution to the problems of the current method for the purpose of using as a geotechnical structural material. It is a practical solution to the problems of the existing mortar grout, The purpose of this study is to establish an underground foundation construction method that effectively achieves the two objectives of the improvement of the ground and the improvement of the ground by compressive compaction of the surrounding ground provided with the columnar reformer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar grout pouring apparatus and a method for constructing a ground foundation by using a high-

The present invention relates to a mortar grout injection mechanism for constructing a reformer of a main body by pressurizing and injecting a mortar grout under pressure into the ground of a target ground, and to a method of constructing an underground foundation using the mortar grout. More particularly, the present invention relates to a mortar grout, In the process of constructing the mortar grout reformer by injecting pressure compaction into the ground, it is possible to simultaneously expand the mortar grout to the surrounding ground in the axial cross section within the depth of the columnar reformer, thereby improving the construction efficiency and construction economics, The mallet grout expansion range is controlled within the range of the pelletizer construction standard so that the standard pelletizer can be constructed and the mortar grout pellet remodel constructed in the ground of the target can be integrated with the pellet even after solidification. Grout injection mechanism and mortar grout using the same Compaction force to a method of injection so that the building ground based realized by.

The method of constructing the underground foundation is to construct a drilled hole in the target ground and to construct a foundation underground by installing a structural material such as concrete and a method of constructing an underground pile of a steel pile or a PHC pile, , And a method of constructing a grout pile for constructing an underground foundation body by the result of an improvement treatment of a target ground by a grouting method.

They are usefully used in different characteristics and applicability according to their construction methods and underground foundation material characteristics.

A method of constructing an underground foundation with a grouted pit body improved by grouting method is to use the foundation of the structure in use, the premade superficial ground, the vulnerable foundation where lateral flow may occur, It is widely used as a ground foundation construction method in grounds that can not be penetrated.

The method of constructing the grout pile body on the target ground can be roughly divided into a high pressure injection displacement injection grouting method and a mortar grout pressure compaction injection method. The mortar grout injection mechanism according to the present invention and the high- The ground foundation construction method by grout pressure compaction injection corresponds to the method by mortar grout pressure compaction injection method.

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 forms a reformer by taking up space, Mortar grout pressure compaction injection methods, which are currently being used for this purpose and concept, are generally classified into two types according to the material characteristics required in the process of compressing and compressing the target mallet grout. And the mortar grout with the characteristics of viscous material is used. The size of the reformer construction standard is determined by the amount of mortar grout injected by the pressure compaction at the depth of the predetermined position by pressure injection of the low flow viscous mortar grout to the target ground In the process, mortar grout remodel As long as the volume is being applied to the concept of the ground around the expected compression compaction effect.

In the implementation of the underground foundation construction method by the present mortar grout pressure compaction injection by the above concept, the quality and utility of the result do not satisfy the desired purpose, As follows.

First, the problem of using low-flow mortar grout in the existing mortar grout pressure injection method is that, in the process of pressure compaction injection of mortar grout in the ground of the target ground, constituent material components are separated from each other, It is advantageous to use a low-flow mortar grout for the purpose of compacting the target ground, expanding the space and constructing the mortar grout reformer, but on the other hand, And after solidification, heterogeneous objects with different properties and behaviors are different from each other and the behavior characteristics are different from each other. Also, the effect of compressive compaction of the surrounding ground is also extinguished with time .

Second, in order to satisfy the requirement as a ground foundation, the grout pile body should be constructed with homogeneous and uniform shapes and specifications from the lower axial end to the upper axial end of the columnar reforming body to be constructed, but the mortar grout is pressure- The expansion process is a passive injection in which the size and shape of the reformer are varied according to the ground conditions. In the construction mechanism according to the current method, the expansion range of the mortar grout is effectively controlled, There is a problem that there is no method that can control so that an underground structure of uniform and uniform shape and standard can be constructed.

Third, in the process of constructing a columnar reformer by pressure injection of a low-flow mortar grout as in the existing method, it is possible to expand the space in the target ground by the material characteristics and behavior characteristics of the low- The injection pressure of the mortar grout uniformly acts on the entire boundary surface where the outer circumferential surface of the mortar grout reformer body opposes the surrounding ground, so that the mortar grout is biased and expanded in the direction of easy pressure injection on the ground, This is because the construction of the mortar grout reformer is irregular and it is constructed as an arbitrary irregular shape depending on the ground condition. Therefore, it is practically inevitable to construct a mortar grout reformer which can secure utility as a ground structure material have.

Fourth, the problem to be solved in the process of constructing the columnar reformer by pressure injection of the low-flow mortar grout is that the improvement target ground generally exists in a state in which the pore water pressure is higher than a certain level in a saturated state, When mortar grout, which has very different physical and behavioral characteristics, is injected under pressure and the surrounding ground is compressed and expanded to construct the mortar grout reformer, the mortar grout is expanded and expanded The pore pressure is locally increased at the interface between the range and the direction of the surrounding ground, and the fracture occurs. When the fracture occurs locally, the mortar grout, which is injected afterwards, concentrates on the part where the fracture has occurred As the fracture progresses, the expansion phenomenon occurs. This is also the one more problem that is substantially not in building the mortar grout improved columnar body that efficacy as a ground structural secured.

Fifth, irregular and biased expansion as described above in the process of pressure injection into the ground of the low fluidity mortar grout, increase of the local pore pressure and fracture of the local pit occurred in the surrounding ground, And after the displacement starts to occur in the buried structure or structure adjacent to the corresponding injection site and depth, the influence of the mortar grout injection amount and the injection rate is also attenuated by the reduction of the injection grout injection rate and the injection rate. There is no other way than stopping the injection of the pressure and re-injecting the injected material at a position deviated from the injection position and the depth. As a result, there is a problem that the construction of the columnar reformer by the pressure compaction injection of the mortar grout is terminated as a meaningless result.

Sixth, the existing Mortar Grout Pressure Compaction Injection Method In accordance with the ground improvement mechanism, the mortar grout is injected into the space to secure the compaction of the target ground, As a result, a localized pressure zone is formed at the interface between the target soil and the mortar grout remodel, and the stress distribution of the locus at a certain distance is regular, and the deformation becomes elastic so that the compaction is performed qualitatively However, such a qualitative compaction state occurs locally and sporadically, and the state of compaction of the localized ground is not a compaction state which is maintained permanently, and since the stress is transferred to a portion where compaction does not occur over time, The compression effect of This problem can not be maintained.

Seventh, in the method of pressure intaglio injection of mortar grout to the target ground separately from the problem caused by the material characteristics of the mortar grout as described above, in the present method, the mortar grout reformer construction depth range from bottom to top A method of advancing the process of injecting the injection amount of each section into the upper stage is applied so that the tip outlet of the injection tube penetrated into the ground is divided into several stages, In order to allow the mortar grout to be subjected to pressure compaction and to provide a space in which the mortar grout modifier can be constructed and to accommodate the plastic deformation without destroying the target ground by the pressure injection of the mortar grout, The injection amount per unit time must be limited and injected The relatively small capacity of the pump used and extrusion injection amount per unit time is also a problem of low-speed injection method is a very efficient construction construction speed and failure to apply a small amount because of the cost of construction increases and this unit.

In the present mortar grout pressure compaction injection method, the above-mentioned problems are caused by the fact that the mortar grout, which is pressure-injected into the target ground, expands in the ground, compresses the surrounding ground to form a space, and the mortar grout reformer is constructed This is because the process is the passive injection mechanism in which the range and shape of the mortar grout are expanded and occupied by the space according to the characteristics of the target ground and the inherent stress conditions.

This mortar grout pressure compaction injection mechanism is not particularly problematic in the case of aiming to increase the overall density of the ground target to be improved by the pressure compaction injection of the mortar grout and thereby to improve the geotechnical grounding force. However, There is a problem that it is difficult to achieve the object of the present invention due to the above-mentioned problems when the mortar grout reformer is constructed by injecting pressure under the ground and using it as a ground structure material.

Therefore, the mortar grout injection apparatus according to the present invention and the ground foundation construction method using the high-velocity mortar grout pressure compaction injection using the mortar grout injection apparatus are constructed by the mortar grout pressure injection, This is a solution to the problems in the existing method for the purpose of using as the geotechnical structural material and the improvement of the standardized mortar grout to improve the utility of the mortar grout by applying pressure compaction in the ground. The purpose of this study is to establish a ground foundation construction method that effectively achieves the two objectives of constructing a sieve and effectively maintaining the ground improvement effect by compression compaction of the surrounding ground where the pillar upgrader is constructed. The following challenges are required.

First, the unsteady action of mortar grout pressure input caused by the heterogeneous nature of the mortar grout, which is applied in the existing mortar grout pressure compaction injection method, The problem of grout biased expansion, the problem of fracture of the ground due to the biased expansion range and orientation of mortar grout, the problem of displacement of adjacent structures and underground buried materials, the local and sporadic manifestation of the effect of compressive compaction of the target site, In order to solve these problems, it is necessary to control the material characteristics and the behavior characteristics of the mortar grout under pressure in the ground of the target so that the mortar grout can assimilate and move with the target ground soil It is necessary to establish a plan for

Second, the process of injecting and expanding the pressure grouting in the mortar grout will be a passive injection in which the size and shape of the reformer are changed according to the ground condition, depth profile and stress anisotropy of the target ground, , There is no way to control the expansion and contraction of the mortar grout in an effective manner so that the axial shape and size of the mortar grout column reformer can be uniformly and uniformly constructed from the bottom to the top. As a solution, it is necessary to establish measures to prevent the mortar grout, which is injected under pressure in the ground of the target ground, from deviating from the scope and specification to build the columnar reformer.

Third, it is necessary to establish a plan to improve the limitation of the injection amount per unit time of mortar grout, which is required as an improvement method in the existing mortar grout pressure injection method, and to reduce the construction efficiency due to low speed injection, increase the unit cost, .

Means for solving the above-mentioned problems in the mortar grout injection mechanism according to the present invention and the foundation construction method using the hydraulic mortar grout pressure compaction injection using the mortar grout injection mechanism are as follows.

In order to construct the columnar reformer in the ground of the target ground by the pressure compaction injection of the mortar grout, the mortar grout is injected under pressure into the ground of the target ground, It is necessary that the grouting force of the grouting force is uniformly applied to compress the surrounding ground so as to secure the space. However, in the present method, the entire circumference of the outer circumferential surface of the mortar grout remodeling body and the surrounding ground The compressive compaction force acting on the surrounding ground soils on the interface and the mallet grout reformer construction standards do not occur uniformly because the mixing ratio of the molten grout in the mortar grout pressure- Due to the flowable material properties, such low fluidity The granular re-grout, which occupies a relatively large mixing ratio among the constituent materials of the de-grout, pushes the surrounding ground, and the transmission of the force for expanding the space is mainly caused by the cohesion due to the viscosity between the particles constituting the granular re- And the expansion of the volume of the mortar grout reformer due to the stress transmission proceeds as a directional deflection expansion rather than radially spreading in the forward direction.

Therefore, in order to uniformly distribute the injection pressure of the mortar grout continuously pressurized in the ground of the target on the whole interface in contact with the surrounding ground, it is necessary to mix the liquid grout in the mortar grout constituent material, The ratio is increased so that the granular re-grout is supersaturated by the liquid grout. In the process of pressure-injecting the mortar grout in a state where the liquid-phase grout is in a rich state, the injection pressure is set to be higher than that of the supersaturated liquid grout The pressure of the mortar grout is in contact with the surrounding ground, and it can be distributed equally to the pore water pressure existing in the surrounding ground on the whole boundary. The pressure of the injection pressure to the surrounding ground and the mortar grout improvement So that the extension of the body construction standard will become the main point. It is necessary.

The method of transferring the injection pressure of the mortar grout to the surrounding ground by the fluid pressure of the liquid grout and the expansion function of the reformer construction specification can be emphasized by the fact that the mixing ratio of the liquid grout at the mixing ratio of mortar grout is increased, The present invention relates to a method for producing a high-strength mortar grout, which comprises the steps of: (a) preparing a mortar grout, The mortar grout injection apparatus according to the present invention and the mortar grout pressure bulking injection method using the mortar grout injection apparatus according to the present invention are used to effectively achieve the object of constructing the stabilized mortar grout columnar reformer, Grout By using the injection mechanism mounted extension range control permeability makche 20 applies a means for injecting a compaction pressure of mortar grout to control the long-range.

In the course of expansion and compression of the mortar grout through the injection mechanism equipped with the above-mentioned extended range control permeable membrane 20, the transfer of the injection pressure to the surrounding ground is carried out in the supersaturated state of the molten grout internal liquid grout The fluid pressure uniformly acts on the whole of the extended range control permeable membrane 20 so that the mortar grout is expanded and the columnar upgrading body is constructed in the entire range of the columnar upgrading body depth, The molten grout in the molten grout constituent material is not released to the outside but is cured in a state of compression-compaction in the expanded-range control permeable membrane 20, and the surplus liquid grout is cured in the expanded range Permeate into the surrounding ground which is compression-compacted through the control permeable membrane 20, and the surrounding ground is compressed So that the action to be solidified is achieved.

By the means of pressure compaction injection of the high-flowable mortar grout into the injection mechanism composed of the above-mentioned extended range control permeable membrane 20, the molar grout is compressed and compacted in the standard of the expanded range control permeable membrane 20 The grout around the columnar reformer expands and the molten grout expands and is compressed and compacted in a state where the liquid grout extruded through the expanded range control permeable membrane 20 is infiltrated. Since the mortar grout column reformer, the expanded range control permeable membrane 20 and the ground structure in which the compressive compaction and cemented surrounding ground are integrated are formed, the mortar grout column reformer constructed in the conventional mortar grout pressure compaction injection method, The local compaction effect of the surrounding ground appears on the entire interface between the local compaction surface The attitude is not a compaction state that can be sustained for a long time, but a measure is taken as a countermeasure against the problem that the effect of the compressive compaction of the surrounding ground is not maintained due to the passage of time and the stress transfer to the part where compaction does not occur.

In the present method, the mortar grout is subjected to pressure compaction in the ground of the target soil by means of pressure compaction injection of the mortar grout through the injection mechanism equipped with the extended range control permeable membrane 20, The mortar grout can be pulled out or separated by a space formed between the outer circumferential surface and the excavation wall penetrating through the ground or by a weak bar or a cavity which may be formed in the ground and a mortar grout reformer is built up to a position close to the ground surface The mortar grout, which is pressurized to a position close to the ground surface due to lack of overpass pressure, is raised so as to raise the ground surface, and measures for solving the problem that the construction can not be carried out are established.

In the conventional method, the range in which the mortar grout is injected into the target ground is limited to the ground surrounding the mortar grout outlet, and therefore, the mortar grout injection mechanism according to the present invention and the high-velocity mortar grout pressure In the underground foundation construction method by compaction injection, by the injection mechanism composed of the expanded range control permeable membrane (20) and the mortar grout induction pipe (11), the mortar grout is expanded in real time pressure injection range in the target ground, This method provides a means to greatly improve the efficiency of construction and the economics of construction, because it is a method of pressure injection of mortar grout by relaxing the restriction.

The mortar grout injection mechanism according to the present invention and the ground foundation construction method using the hydraulic grout pressure injection using the same have the following effects.

first; The molten grout grout is injected under pressure into the ground by injecting the molten grout in the state where the liquid grout is multiplied through the mortar grout injection mechanism 10 so that the pressure of the mortar grout is injected into the ground, And the extension range is also standardized and controlled to the inside range of the expanded range control permeable membrane (20) intruded into the ground. Therefore, the mortar grout reformer is standardized in the entire depth range of the desired columnar reformer, And the object to be constructed can be used to perform the utility and function as the ground structure material.

second; In the process of injecting the high-flowable mortar grout in which the liquid grout is increased through the mortar grout injecting mechanism 10 into the ground of the target ground, the granular material grout in the mortar grout constituting material does not fall outside the columnar upgrading body composition range, The surplus liquid grout existing in a supersaturated state in the unsalt mortar grout is passed through the extended range control permeable membrane 20 to the periphery of the permeable permeable membrane 20, Since the soil is pressure-infiltrated and solidified in the course of compression, the resultant mortar grout column body and the liquid grout are infiltrated, and the surrounding ground consolidated and compacted is integrated into the interface of the expanded range control permeable membrane (20) Soil structural material was completed and mortar grout column reformer of the standardized structure as the ground structure material The purpose of construction is to effectively achieve the purpose of continuing the effect of improving the compression strength of the surrounding ground, and it is possible to achieve the objective that can further demonstrate the utility and function of the ground structure material.

third; Since the high-velocity molybdenum mortar is pressure-fed into the entire space inside the expanded permeability permeable membrane 20 of the mortar grout injection mechanism 10, the expansion action of the surrounding ground compression compaction by the mortar grout injected by the pressure is controlled by the extended range control permeable membrane 20), the range or pressure for compressing the surrounding ground is not concentrated in the local part because the dispersion progresses in the entire inner space, and the process of constructing the mortar grout reformer progresses also in the whole section of the columnar reformer building, It is possible to greatly improve the construction efficiency and the construction economical efficiency in comparison with the existing methods.

fourth; The pressurized compaction injection of the mortar grout using the mortar grout injection mechanism (10) allows the pressurized compaction of the mortar grout to be progressively and self-pressurized throughout the depth range where the mortar grout is injected under pressure, The mortar grout induction pipe (11), which is inserted upright in the space from the lower end to the upper end of the mortar grout pressure injection depth range, maintains the uprightness of the columnar reforming body until the mortar grout reformer constructed by injecting the pressure compaction into the soil is solidified And it has an effect of preventing the subsidence and deformation of the subsidence, and after the mortar grout column expander is solidified, the columnar reformer can exert its function as a geotechnical structural material having a proof resistance against the lateral force.

fifth; Even if the mortar grout injection pipe 12 is removed after the pressure compaction injection of the mortar grout is completed for the depth range of the mortar grout column reformer by the position of the target ground, The control permeable membrane and the mortar grout induction pipe upper joint portion 21 are closed and the mortar grout, which is compressed inside the expansion range control permeable membrane body 20, is cured in the state of high pressure under compression, The mortar grout column reformer having an improved quality than the mortar grout columnar reformer according to the conventional method of curing in the extinction state can be constructed.

Sixth; The pressurized compaction injection of the mortar grout through the mortar grout injection mechanism (10) is carried out in such a manner that the mortar grout is injected under pressure into the expanded range control permeable membrane (20) in the ground of the target soil, thereby minimizing the separation or leaching of the material And it is effective as a construction method particularly effective in construction in which the separation of materials and the influence thereof on the soil or underwater environment must be taken into account, and the construction in which high solidification is to be formed in the water.

Seventh; A molar grout injection mechanism (not shown) including a mortar grout induction pipe 11, an extended range control permeable membrane 20, an extended range control permeable membrane lower temporary coupling portion 23 and an extended range control permeable membrane reverse flow blocking portion 22 10), the mortar grout column reformer is limited to the inner space of the expanded-range control permeable membrane 20, so that the upper end of the columnar reformer to be formed in the conventional method is placed in the near- The mortar grout which is injected under pressure into the ground of the target ground is pulled out to the ground surface due to the lack of confining pressure in the target ground and the formation of the column formers is not made impossible and the composition of the mortar grout column formulator , The extent of the mortar grout in the target ground is limited to the extent of the extended range control permeable membrane (20) in the transverse direction In the axial direction, it is concentrated in the upward direction of the extended range control permeable membrane length and in the bulge enlargement direction of the lower end. When applied to the restored structure of the unevenly depressed structure, the restoration force due to expansion and expansion of the mortar grout And there is an effect that concentration can be made upward.

1 is a schematic view of a connection of a mortar grouting system 10 according to the present invention.
2 is an exploded view of a mortar grouting system 10 according to the present invention.
FIG. 3 is a schematic view showing the connection of the upper end portion of the molar grout induction pipe 11 with the extended range control permeable membrane 20 of the mortar grouting system 10 according to the present invention.
FIG. 4 is a schematic view of the extended range-controlled permeable membrane bottom con- tinuous portion 23 of the mortar grouting system according to the present invention.
FIG. 5 is a schematic view showing that a mortar grout is injected under pressure through a mortar grouting system 10 according to the present invention and a columnar reformer of uniform size and shape is formed
FIG. 6 is a view illustrating a process of forming a mortar grout columnar reformer in a standard range through a mortar grout injection mechanism 10 according to the present invention and a process of forming a mortar grout columnar reformer by compressing and solidifying the surrounding ground, (A) is a drill hole drilling to a depth range of the mortar grout reformer, (b) is a mortar grout injection into a drill hole, and (C) shows the connection between the mortar grout injection mechanism 10 and the mortar grout pressure transfer pipe 14, and (d) shows a state in which the expansion range control permeable membrane 20 is filled (E) is the continuation of the mortar grout pressure injection to the extension range control permeable membrane (20) standard range, and (c) Improvement of surrounding ground by penetration of liquid grout in compression compaction process

The mallet grout injection mechanism according to the present invention and the construction method of the ground foundation construction using the hydraulic mallet grout pressure injection using the same are as follows.

1, the mortar grout injection mechanism 10 includes a mortar grout induction pipe 11, an extended range control permeable membrane 20, and a mortar grout induction pipe 11), an extended range control permeable membrane formed on the upper portion of the mortar grout induction pipe (11), and a mortar grout induction pipe upper engaging portion (21), the injection of the mortar grout is carried out by a mallet grout injection pipe (12) fitted into the mortar grout induction pipe (11) and an extension range control permeable membrane and a mortar grout induction pipe upper joining portion (21) Lt; / RTI >

The diameter (A) and the free length (B) of the mortar grout induction pipe (11), which is made of an elastic steel compression spring, are designed to have a minimum inner diameter of the mortar grout pressure transmission line.

The mortar grout extension range control permeable membrane 20 is a water permeable fiber membrane having a predetermined range of tensile strength. The standard and length of the permeable membrane 20 are cylindrical permeable And is formed as a fiber membrane body.

The mortar grout injection pipe 12 is connected to the mortar grout induction pipe 11 at a length including the depth from the upper end of the mortar grout reformer depth range to the target ground surface and the range required to be inserted into the mortar grout induction pipe 11, A soft tube or a steel pipe having a standard size that can be inserted therein and a certain range of the lower end thereof is formed in an axial cut portion so that the resistance of the mortar grout is increased when the molten grout is extruded into the expanded range control permeable membrane 20 It is designed to minimize the force and prevent the force that is pushed up by the action of reaction force from acting.

The mortar grout injecting mechanism 10 according to the present invention includes a process of assembling and manufacturing the mortar grout injecting mechanism 10 as shown in FIG. 1, a process of assembling the molar grout injecting mechanism 10 into the excavation hole 30 for each position of the target ground, The molleter grout injection mechanism 10 is allowed to coincide so as to conform to the following conditions.

The process of assembling and manufacturing the mortar grout injection mechanism 10 is carried out in the following sequence of steps.

(A) and the free length (B) of the mortar grout are to be constructed with the minimum inner diameter of the mortar grout pipeline system. Preparing a mortar grout induction pipe (11); (D) is designed to control the extent of mallet grout expansion in the range of mallet grout column reformer to be formed into a water permeable cylindrical fibrous membrane body having a predetermined range of tensile strength. The diameter Preparing an extended range control permeable membrane (20) having an allowance length that is longer than the length (L) of the mortar grout induction pipe (11) in accordance with the mortar grout reformer standard; The mortar grout induction pipe 11 is inserted into the inner space of the extended range control permeable membrane 20 to the lower end position of the extended range control permeable membrane 20 and the mortar grout induction pipe 11 Control permeable membrane 20 is bound to the outer circumferential surface of the upper end of the mortar grout induction pipe 11 while leaving an allowable length portion of the extended range control permeable membrane 20 longer than the length L of the expanded range control permeable membrane 20, And a mortar grout induction pipe upper joining portion (21); A portion of the entire length of the extended range control permeable membrane 20 having an allowance length longer than the length L of the mortar grout induction pipe 11 is inserted into the inner space of the mortar grout induction pipe 11 to form an expanded range control permeable membrane backflow blocking (22) to complete the combined structure of the mortar grout injection apparatus.

The process of placing the mortar grout injection mechanism 10 in the drilling hole 30 according to the position of the target ground so as to coincide with the upper and lower ends of the depth range of the mortar grout reformer is performed in the following step sequence.

Forming a drilling hole (30) in the ground of the target ground by drilling to a lower end of the depth range of the mortar grout reformer; The lower end of the extended range control permeable membrane 20 is temporarily bound to extend into the extended space (not shown) so as to easily insert the molar grout injection mechanism 10 assembled into the inner space of the excavation hole 30 formed by the perforation in the above- Controlling the control permeable membrane lower temporary binding section (23); An expanded range control permeable membrane located at the upper end of the mortar grout injection mechanism 10 and a mortar grout induction pipe upper engagement portion 21 and an inner space of the mortar grout induction pipe 11 and the extended range control permeable membrane reverse flow blocking portion 21 Inserting a mortar grout injection pipe (12) having a mortar grout pressurization system connection port (13); The upper and lower positions of the mortar grout reformer depth range are inserted from the lower end of the mortar grout injection mechanism 10 into the drilling hole 30 formed by drilling up to the lower end position of the mortar grout injection depth range, And placing the mortar grout injection mechanism 10 in the inner space of the excavation hole 30 so that the upper and lower end positions coincide with each other.

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Using mortar grout injection mechanism (10) according to the present invention, mortar grout is injected under pressure in the range of depth of columnar reformer of the target ground, and the mortar grout columnar reformer is constructed and the compression and compaction of the surrounding ground are progressed in parallel. The process of completing the integrated soil structure is done in the following step-by-step sequence.

Connecting the mortar grout feeding pipe line (14) to the mortar grout feeding line connecting port (13) of the mortar grouting device (10) settled in the ground of the target ground;

The mortar grout is gradually introduced into the entire range of the inside of the extended range control permeable membrane 20 through the mortar grout pressure transmission line 14, the mortar grout injection pipe 12 and the mortar grout induction pipe 11 by the pressurization of the mortar grout by the pumping ; ≪ / RTI >

The molar grout is gradually charged into the entire range of the inside of the expanded range control permeable membrane 20 and the mortar grout is expanded to the void space inside the excavation hole 30 at the boundary surface of the expanded range control permeable membrane 20 ;

When the mortar grout is filled with the mortar grout, the lower end temporary binding portion 23 is disassembled and the bulge portion is formed by the pressurization of the mortar grout, which is continued when the expansion filling of the mortar grout 30 is completed. Extension of compressive compaction of surrounding ground and mortar grout reformer from the area where the resistance of the mortar grout is small to the range of the extended range control permeable membrane (20) ;

Compressing compaction of the surrounding ground to the extent of the extended range control permeable membrane (20) and extension of the mortar grout reformer in the entire section from the lower end to the upper end of the pillar depth improvement range;

In the process of compression compaction of the surrounding ground up to the standard range of the expanded range control permeable membrane 20 and expansion of the mortar grout reformer, the granular re-grout in the molar grout, which has been demineralized, is compressed in the inner space of the extended range control permeable membrane 20 (M), and the surplus liquid grout of the molten grout is permeated (P) into the surrounding ground in which the compaction of the expanded-range control permeable membrane (20) is progressed to the boundary surface;

The compression compaction of the surrounding ground and the expansion of the mortar grout reformer are completed to the standard range of the extended range control permeable membrane (20) from the whole section from the bottom to the top of the columnar reformer depth range, and the specified amount of mortar grout pressure injection Withdrawing and withdrawing the mortar grout injection pipe 12 from the mortar grout injection mechanism 10;

When the mortar grout injection pipe 12 is pulled out, the pressure-injected mortar grout is pressurized in the expanded-range control permeable membrane 20 by the internal pressure, and the internal space of the extended range control permeable membrane and the mortar grout induction pipe upper- And the expansion range control permeable membrane backflow blocking portion 22 is also expanded in the process, closing the backflow of the mortar grout at the lower portion of the upper portion of the mallet grouting pipe upper joint portion 21 and the expanded range control permeable membrane;

In the course of curing and solidification of the mortar grout injected into the inner space of the permeable membrane 20, the liquid grout injected into the surrounding ground solidifies the compression ground of the surrounding ground, And a substructure in which the mortar grout columnar reformer formed according to the standard of the extended range control permeable membrane 20 is structurally connected to the peripheral ground through the control permeable membrane 20 is completed.

The process of filling the mortar grout columnar reformer in the ground of the target ground by the mortar grout injection mechanism 10 according to the present invention and completing the compaction and consolidation of the surrounding ground and integrating the ground structure with the ground floor is completed in more detail Then,

Connecting the mortar grout feed pipe line (14) to the mortar grout feed line connection port (13) of the mortar grout injection device (10) settled in the ground of the target ground;

The mortar grout pressurization system connection port 13 and the mortar grout injection pipe 12 are integrally joined to each other so that the inside diameter thereof is the same as the inside diameter of the mortar grout pressure transfer pipe 14, Pressure structure in which the mortar grout can be easily attached to and detached from the pressure feeding pipe (14).

 The structure of the mortar grout pressurization system connection port 13 and the mortar grout injection pipe 12 is as shown in FIG. 2. The structure of the mortar grout injection connection pipe 13 and the mortal grout injection pipe 12 is as shown in FIG. 2, The mortar grout injection pipe 12 is inserted into the inner space of the mortar grout induction pipe upper joint portion 21 and is inserted into the excavation hole 30. The length of the mortar grout injection pipe 12 is set to a predetermined position It is adjusted according to the depth from the ground surface at the top of the depth of mortar grout construction and is made and installed by adjusting the mortar grout feeding system connection port (13) to be located on the ground surface.

The mortar grout is gradually introduced into the entire range of the inside of the extended range control permeable membrane 20 through the mortar grout pressure transmission line 14, the mortar grout injection pipe 12 and the mortar grout induction pipe 11 by the pressurization of the mortar grout by the pumping ; ≪ / RTI > The molar grout is gradually charged into the entire range of the inside of the expanded range control permeable membrane 20 and the mortar grout is expanded to the void space inside the excavation hole 30 at the boundary surface of the expanded range control permeable membrane 20 In step;

The mortar grout, which is pressurized and fed through the mortar grout feed pipe 14 and the mortar grout feed pipe 12, is first filled into the inner space of the mortar grout induction pipe 11, and then the mortar grout induction pipe Controlled permeable membrane 20, the filling is started into the space formed by the free length of the expanded range control permeable membrane body 20 and the filling is started into the internal space of the expanded range controlled permeable membrane body 20, The entire range is progressively filled with mortar grout, and the mortar grout is expanded and filled up to the empty space in the excavation hole 30 with the expanded range control permeable membrane 20 at the boundary surface.

When the mortar grout is filled with the mortar grout, the lower end temporary binding portion 23 is disassembled and the bulge portion is formed by the pressurization of the mortar grout, which is continued when the expansion filling of the mortar grout 30 is completed. Extension of compressive compaction of surrounding ground and mortar grout reformer from the area where the resistance of the mortar grout is small to the range of the extended range control permeable membrane (20) ; At the stage where compression compaction of the surrounding ground and expansion of the mortar grout reformer occur from the whole section from the lower end to the upper end of the pillar depth improvement range to the standard range of the extended range control permeable membrane 20;

When the filling of the molten grout into the empty space in the drilling hole 30 is completed, the lower bound temporary bonding portion 23 of the extended range control permeable membrane is disassembled by press-fitting of the mortar grout, The grout column reformer bulb is formed and the resistance to the pressure injection expansion of the mortar grout on the boundary surface with the surrounding ground in the depth range of the mortar grout column reformer is secured from the depth range and the expansion of the mortar grout is secured by the compression compaction of the ground. The expansion of the mortar grout is not concentrated in the biased direction and position but is performed concurrently from the entire range within the extended range control permeable membrane 20 to the standard range of the extended range control permeable membrane 20 .

In the conventional method, the depth of the columnar reformer is divided into a predetermined interval (25 to 35 cm), and a stepwise infiltration method is applied. Therefore, the range of expansion of the mortar grout at each injection depth, And the amount of injection per unit time is limited to a range of 60 liters per minute or less.

In the method of pressurizing the mortar grout into the target ground by applying the mortar grout injection mechanism 10 according to the present invention, the entire range of the columnar modifier construction depth is within the extended range control permeable membrane body 20, Since the expansion is progressed, the range in which the mortar grout is expanded is not limited to the local part, and the restriction requirement on the injection amount per unit time is relaxed. As the length of the mortar grout reformer is increased, the injection amount per unit time is increased There are advantages to be able to.

(20) to the standard range of the extended range control permeable membrane (20) on the entire interface between the expanded range control permeable membrane (20) and the surrounding ground of the columnar reformer, When the compression compaction and the mortar grout expansion are completed, the mortar grout continuously pressurized into the expansion range control permeable membrane 20 is expanded to the depth range not yet extended to the standard range, and the mortar grout expansion range is sequentially expanded. The pressure inside the membrane body 20 is gradually increased.

During this process, the mortar grout induction pipe (11) can supply the mallet grout in the corresponding depth range even if the depth range of expansion of the mallet grout in the entire ground is varied, within the entire depth range of the mallet grout upgrading body It is possible to achieve uniformity and standardization over the entire depth range of the mortar grout reformer to form a regular columnar reformer.

In the process of compression compaction of the surrounding ground up to the standard range of the expanded range control permeable membrane 20 and expansion of the mortar grout reformer, the granular re-grout in the molar grout, which has been demineralized, is compressed in the inner space of the extended range control permeable membrane 20 (M), and the surplus liquid grout of the molten grout is entrained (P) into the surrounding ground where the compaction of the expanded-range control permeable membrane (20) is proceeding to the boundary surface;

The mallet grout constituted of the granular material constituting the mortar grout constituting material which is pushed into the expanded range control permeable membrane (20) is gradually compressed in the expanded range controlled permeable membrane (20) as the pressurized mortar grout is continuously increased, And the molten grout is compressed in the expanded range control permeable membrane 20 and the surplus liquid grout contained in the molten grout itself is expanded during the process of gradually increasing the internal pressure of the molten grout, The range-controlled permeable membrane 20 is pressure-infiltrated into the surrounding ground which is being compressed and bounded to the boundary surface.

The mortar grout is compressed and compactioned in the inner space with the expanded range control permeable membrane 20 as an interface, and the mortar grout column reformer is formed, and in the expansion process of the mortar grout, the liquid grout is pressurized and the compression grooves are compressed In the conventional method, the problems caused by the low-fluidity mortar grout being pressurized into the ground of the target ground and the ground soil of the target ground and the mortar grout being pressurized due to the difference in material properties are not alleviated.

The compression compaction of the surrounding ground and the expansion of the mortar grout reformer are completed to the standard range of the extended range control permeable membrane (20) from the whole section from the bottom to the top of the columnar reformer depth range, and the specified amount of mortar grout pressure injection Withdrawing and withdrawing the mortar grout injection pipe 12 from the mortar grout injection mechanism 10; When the mortar grout injection pipe 12 is pulled out, the pressure-injected mortar grout is pressurized in the expanded-range control permeable membrane 20 by the internal pressure, and the internal space of the extended range control permeable membrane and the mortar grout induction pipe upper- In the process, the expansion range control permeable membrane backflow blocking portion 22 is also expanded and closing the backflow of the mortar grout at the lower portion of the mallet grout induction pipe upper joining portion 21;

When the mortar grout required to complete the mortar grout reformer specification is completed, the mortar grout pressure feed is stopped and the mortar grout pressure pump is back rushed 2 or 3 times to obtain mortar grout The pressurization system and the internal pressure of the mortar grout injection pipe 12 are partially released.

The lower cut portion of the mortar grout injection pipe 12 in the process of back rushing the mortar grout pressure pump 2 ~ 3 times to partially release the internal pressure of the mortar grout pressurization system and the mortar grout injection pipe 12 Since the action of the pressure acting on the inner space of the extended range control permeable membrane 20 causes the action to be disturbed toward the inner space of the mortar grout injection pipe 12, the mortar grout induction pipe 11, the extended range control permeable membrane body and the mortar grout It is easy to separate the molten grout injecting mechanism 10 from the inner space of the induction pipe upper joining portion 21.

When the mortar grout injection pipe 12 is detached from the mortar grout injection mechanism 10, the mortar grout in the compression-compaction state in the expanded-range control permeable membrane body 20 is extended to the outside through the extended range control permeable membrane and the mortar grout induction pipe top In this process, the expansion range control permeable membrane countercurrent blocking portion 22 located in the inner space of the mortar grout induction pipe 11 is also pushed out and tangled with each other, The passage through which the mortar grout can be pulled out is closed at the lower portion of the control permeable membrane and the mortar grout induction pipe upper joint portion 21. [

When the extension range control permeable membrane and the lower portion of the mortar grout induction pipe upper joining portion 21 are closed by the extended range control permeable membrane backflow blocking portion 22, the mortar grout The columnar reformer is formed with a mortar grout column reformer having a better quality than that of the mortar grout columnar reformer according to the conventional method in which the curing is performed under the condition of high pressure of compression and the internal pressure is extinguished.

In the course of curing and solidification of the mortar grout injected into the inner space of the permeable membrane 20, the liquid grout injected into the surrounding ground solidifies the compression ground of the surrounding ground, At the completion of the soil structural material in which the mortar grout columnar reformer and the surrounding ground are structurally joined to the boundary of the control permeable membrane 20 according to the specification of the extended range control permeable membrane 20;

The expanded range control permeable membrane body 20 is cemented to the boundary surface in the course of curing and consolidation of the mortar grout columnar reformer in the compression compaction state inside the expanded range control permeable membrane body 20 by the expanded range control permeable membrane countercurrent blocking section 22. [ Since a certain range of the surrounding ground contacting with the grout column reformer is cured and cured in parallel with the pressure of the liquid grout, the mortar grout column reformer and the expanded ground control permeable membrane 20 and the surrounding ground are integrated with each other, Is completed.

The construction of the ground structure in which the mortar grout column reformer and the extended range control permeable membrane 20 and the compression compaction peripheral ground are integrated with each other is considered as the securing force against the axial force acting on the target ground, In order to maintain durability and durability of soil improvement and soil structure composition, it is a very important quality requirement.

10; Mortar grout injection equipment
11; Mortar grout induction pipe
12; Mortar grout injection pipe
13; Mortar grout pressurization system connection
14; Mortar grout pressure transmission line
20; Extended range control pitcher
21; Extended range control permeable membrane and mortar grout induction pipe upper joint part
22; Extended Range Control Permeate Membrane Backflow Blocker
23; Extended range control permeable membrane bottom temporary binding section
30; Excavation ball
A; Mortar grout induction pipe diameter
B; Mortar grout guide tube free length
D; Extended range control Permeate membrane diameter
L; Mortal grout guide pipe
G1; Underground indentation of mortar grout
G2; Expansion range control Pore membrane Internal mortar Grout charge extension
M; Expansion range control Pressure compaction inside permeable membrane Mortar grout to be charged
P; Extension range control Penetration of the permeable membrane to the interface and penetration of the liquid grout into the surrounding ground and compression compaction

Claims (10)

(A) and the free length (B) of the mortar grout are to be constructed with the minimum inner diameter of the mortar grout pipeline system. A mortar grout induction pipe (11);
(D) is designed to control the extent of mallet grout expansion in the range of mallet grout column reformer to be formed into a water permeable cylindrical fibrous membrane body having a predetermined range of tensile strength. The diameter An extended range control permeable membrane (20) having an allowance that is longer than the length (L) of the mortar grout induction pipe (11) in accordance with the mortar grout column reformer standard;
The mortar grout induction pipe 11 is inserted into the inner space of the extended range control permeable membrane 20 to the lower end position of the extended range control permeable membrane 20 and the mortar grout induction pipe 11 And the extended range control permeable membrane 20 is bound to the outer peripheral surface of the upper end of the mortar grout induction pipe 11 while leaving the margin length portion of the extended range control permeable membrane 20 longer than the length L of the molten grout induction pipe 11, A permeable membrane and a mortar grout induction tube upper engagement portion 21;
A portion of the entire length of the extended range control permeable membrane 20 having an allowance length longer than the length L of the mortar grout induction pipe 11 is inserted into the inner space of the mortar grout induction pipe 11, A reverse flow blocking portion (22); Wherein the grout grouting grout grouting grout grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting grout grouting
delete Forming a drilling hole (30) in the ground of the target ground by drilling to a lower end of the depth range of the mortar grout reformer;
Mortar grout column reformer construction depth range The length (L) of elastic steel compression springs is made up of the diameter (A) and the free length (B) of the mortar grout. Preparing a tube (11);
The diameter D of the water permeable cylindrical fibrous membrane body having a predetermined range of tensile strength is in accordance with the mortar grout columnar reformer standard to be formed and the length thereof is greater than the length L of the mortar grout induction pipe 11 Preparing an extended range control permeable membrane (20);
The mortar grout induction pipe 11 is inserted into the inner space of the extended range control permeable membrane 20 to the lower end position of the extended range control permeable membrane 20 and the mortar grout induction pipe 11 The extended range control permeable membrane 20 is bound to the outer peripheral surface of the upper end of the mortar grout induction pipe 11 by leaving the margin length portion of the extended range control permeable membrane 20 longer than the length L of the pipe 11, Constructing a permeable membrane and a mortar grout induction pipe upper engagement portion (21);
A portion of the entire length of the extended range control permeable membrane 20 having an allowance length longer than the length L of the mortar grout induction pipe 11 is inserted into the inner space of the mortar grout induction pipe 11 to form an expanded range control permeable membrane backflow blocking (22) to complete the combined configuration of the mortar grout injection apparatus (10);
The lower end portion of the expansion range control permeable membrane 20 is temporarily bound and expanded so as to facilitate penetration into the inner space of the excavation hole 30 formed by punching the mortar grout injection device 10 constructed in the above- Controlling the range-controlled permeable membrane lower temporary binding portion (23);
An expanded range control permeable membrane located at the upper end of the mortar grout injection mechanism 10 and a mortar grout induction pipe upper engagement portion 21 and an inner space of the mortar grout induction pipe 11 and the extended range control permeable membrane reverse flow blocking portion 21 Inserting a mortar grout injection pipe (12) having a mortar grout pressurization system connection port (13);
The upper and lower positions of the mortar grout reformer depth range are inserted from the lower end of the mortar grout injection mechanism 10 into the drilling hole 30 formed by drilling up to the lower end position of the mortar grout injection depth range, Placing the mortar grout injection mechanism (10) in the inner space of the excavation hole (30) so that the upper and lower end positions coincide with each other; In order,
A method for placing a mortar grout injection mechanism (10) in an inner space of a drill hole (30) so that the upper and lower positions of the mortar grout reformer construction depth range coincide with the upper and lower ends of the mortar grout injection mechanism (10).
Forming a drilling hole (30) in the ground of the target ground by drilling to a lower end of the depth range of the mortar grout reformer;
(A) and the free length (B) of the mortar grout are to be constructed with the minimum inner diameter of the mortar grout pipeline system. A mortar grout induction pipe (11); (D) is designed to control the extent of mallet grout expansion in the range of mallet grout column reformer to be formed into a water permeable cylindrical fibrous membrane body having a predetermined range of tensile strength. The diameter An extended range control permeable membrane (20) having an allowance that is longer than the length (L) of the mortar grout induction pipe (11) in accordance with the mortar grout column reformer standard; The mortar grout induction pipe 11 is inserted into the inner space of the extended range control permeable membrane 20 to the lower end position of the extended range control permeable membrane 20 and the mortar grout induction pipe 11 And the extended range control permeable membrane 20 is bound to the outer peripheral surface of the upper end of the mortar grout induction pipe 11 while leaving the margin length portion of the extended range control permeable membrane 20 longer than the length L of the molten grout induction pipe 11, A permeable membrane and a mortar grout induction tube upper engagement portion 21; A portion of the entire length of the extended range control permeable membrane 20 having an allowance length longer than the length L of the mortar grout induction pipe 11 is inserted into the inner space of the mortar grout induction pipe 11, A reverse flow blocking portion (22); Preparing a mallet grout injection mechanism (10) in combination;
The lower end of the extended range control permeable membrane 20 is temporarily bound to facilitate penetration into the internal space of the excavation hole 30 formed by perforating the mortar grout injection device 10, (23);
An expanded range control permeable membrane located at the upper end of the mortar grout injection mechanism 10 and a mortar grout induction pipe upper engagement portion 21 and an inner space of the mortar grout induction pipe 11 and the extended range control permeable membrane reverse flow blocking portion 21 Inserting a mortar grout injection pipe (12) having a mortar grout pressurization system connection port (13);
The upper and lower positions of the mortar grout reformer depth range are inserted from the lower end of the mortar grout injection mechanism 10 into the drilling hole 30 formed by drilling up to the lower end position of the mortar grout injection depth range, Placing the mortar grout injection mechanism (10) in the inner space of the excavation hole (30) so that the upper and lower end positions coincide with each other;
Connecting the mortar grout feeding pipe line (14) to the mortar grout feeding line connecting port (13) of the mortar grouting device (10) settled in the ground of the target ground;
The mortar grout is gradually introduced into the entire range of the inside of the expanded range control permeable membrane 20 through the mortar grout pressure transmission line 14, the mortar grout injection pipe 12 and the mortal grout induction pipe 11 by the pressurization of the mortar grout by pumping. ; ≪ / RTI >
The molar grout is gradually charged into the entire range of the inside of the expanded range control permeable membrane 20 and the mortar grout is expanded to the void space inside the excavation hole 30 at the boundary surface of the expanded range control permeable membrane 20 ;
When the mortar grout is filled with the mortar grout, the lower end temporary binding portion 23 is disassembled and the bulge portion is formed by the pressurization of the mortar grout, which is continued when the expansion filling of the mortar grout 30 is completed. Extension of compressive compaction of surrounding ground and mortar grout reformer from the area where the resistance of the mortar grout is small to the range of the extended range control permeable membrane (20) ;
Compressing compaction of the surrounding ground to the extent of the extended range control permeable membrane (20) and extension of the mortar grout reformer in the entire section from the lower end to the upper end of the pillar depth improvement range;
In the process of compression compaction of the surrounding ground up to the standard range of the expanded range control permeable membrane 20 and expansion of the mortar grout reformer, the granular re-grout in the molar grout, which has been demineralized, is compressed in the inner space of the extended range control permeable membrane 20 (M), and the surplus liquid grout of the molten grout is permeated (P) into the surrounding ground in which the compaction of the expanded-range control permeable membrane (20) is progressed to the boundary surface;
The compression compaction of the surrounding ground and the expansion of the mortar grout reformer are completed to the standard range of the extended range control permeable membrane (20) from the whole section from the bottom to the top of the columnar reformer depth range, and the specified amount of mortar grout pressure injection Withdrawing and withdrawing the mortar grout injection pipe 12 from the mortar grout injection mechanism 10;
When the mortar grout injection pipe 12 is pulled out, the pressure-injected mortar grout is pressurized in the expanded-range control permeable membrane 20 by the internal pressure, and the internal space of the extended range control permeable membrane and the mortar grout induction pipe upper- And the expansion range control permeable membrane backflow blocking portion 22 is also expanded in the process, closing the backflow of the mortar grout at the lower portion of the upper portion of the mallet grouting pipe upper joint portion 21 and the expanded range control permeable membrane;
In the course of curing and solidification of the mortar grout injected into the inner space of the permeable membrane 20, the liquid grout injected into the surrounding ground solidifies the compression ground of the surrounding ground, A step of completing the geotechnical structural member in which the mortar grout columnar reformer and the surrounding ground are structurally joined to the boundary of the control permeable membrane 20 according to the specification of the expanded range control permeable membrane 20; The method for constructing the foundation of the ground by pressure injection of mortar grout.
5. The method of claim 4,
A molar grout injection mechanism (not shown) including a mortar grout induction pipe 11, an extended range control permeable membrane 20, an extended range control permeable membrane lower temporary coupling portion 23 and an extended range control permeable membrane reverse flow blocking portion 22 10), the expansion range of the mortar grout in the target soil is limited to the extent of the extended range control permeable membrane (20) in the transverse direction, but is limited to the extent of the extended range control permeable membrane in the axial direction Of the mortar grout and the restoring force due to the expansion of the mortar grout can be limited to a concentrated position when the mortar grout is applied to the restoration hole of the unevenly floated structure concentrated in the upward direction and the bulge enlargement direction of the lower end of the mortar grout Underground foundation construction method by injection.
5. The method of claim 4,
The mortar grout constituted of a granular material constituting material of the equilibrium high velocity homogeneous mortar grout pressurized into the extended range control permeable membrane 20 through the mortar grout induction pipe 11 is expanded only to the extent of the extended range control permeable membrane 20 And is cured in a compression compaction state within the extended range control permeable membrane (20), and the surplus liquid grout is permeable to the surrounding ground which permeates the expanded range control permeable membrane (20) to the interface to expand the mortar grout Wherein the ground structure material is formed in which the peripheral ground consolidated and compacted in a state where the mortar grout reforming body and the liquid grout are infiltrated with the infiltration and consolidation is integrated into the interface of the expanded range control permeable membrane 20, Ground foundation construction method by.
5. The method of claim 4,
The molten metal mortar is pressurized into the entire space inside the expanded range control permeable membrane 20 and the action of the mortar grout compressing and expanding the surrounding ground is progressively progressed in the entire internal space of the expanded range controlled permeable membrane 20. [ As the range is enlarged, the restriction on the amount of underground pressurization per unit hour of mortar grout is relaxed. It can be applied by increasing the injection amount per unit time as the depth of mortar grout reformer construction is increased by location of the target ground Construction method of underground foundation by pressure injection of mortar grout.
5. The method of claim 4,
The mallet grout induction pipe (11), which is erected in the space from the bottom to the top of the mallet grout pressure injection depth range, is made of an elastic steel compression spring. The mortar grout induction pipe (11) It is possible to maintain the uprightness of the reformer and to prevent the settlement deformation and the sinking of the mortar grout, and after the mortar grout reformer has solidified, the columnar reformer can exhibit the function as the ground structural material having the resistance against the lateral force A method of constructing an underground foundation by pressure injection of mortar grout.
delete 5. The method of claim 4,
A molar grout injection mechanism (not shown) including a mortar grout induction pipe 11, an extended range control permeable membrane 20, an extended range control permeable membrane lower temporary coupling portion 23 and an extended range control permeable membrane reverse flow blocking portion 22 10), the upper part of the columnar reformer is close to the surface of the ground, and even if the mortar grout columnar reformer is to be provided up to the surface, the extended range control permeable membrane (20) A method of constructing an underground foundation by pressure injection of mortar grout, characterized in that the expansion of the grout and the range of the columnar upgrading body are limited so that the mortar grout pressure-injected into the ground of the target ground is not extended to the ground due to lack of confining pressure.

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100859872B1 (en) * 2008-02-27 2008-09-24 강익희 An anchor equipped winding fixation-packer and constructing method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100859872B1 (en) * 2008-02-27 2008-09-24 강익희 An anchor equipped winding fixation-packer and constructing method thereof

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