JPH1129941A - Earth retaining lining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a rotary projection type earth-retaining lining device into a structure such, that the troubles of closure due to setting of an earth-retaining material seldom occur. SOLUTION: A-vertical cylindrical casing 8 is provided at its upper end with inlets 12, 14 respectively for an earth-retaining material and an accelerating agent, and as the earth retaining material introduced via the inlet 12 is made to fall inside the casing 8 by the action of gravitational force, it is mixed with the accelerating agent by an agitating member 10, and a barrier 16 for feeding the earth retaining material and the accelerating agent separately to the agitating member 10 is hung from the top wall 8b of the casing 8. A first wiping member 17 for the outer peripheral surface of the cylindrical barrier 16 which is concentric with the casing 8 and a second wiping member 18 for the inner peripheral surface of the casing 8 including the inlet for the accelerating agent are extended from a shaft member 9. Further, the agitating member 10 is projected up to a position where it is close to the inner peripheral surface of the casing 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth retaining lining device for lining an excavated wall with a cement earth retaining material such as concrete.

[0002]

2. Description of the Related Art In a deep foundation method adopted for pile construction in a steep place in a mountainous area, as a soil retaining work for an excavated wall surface,
Recently, a spraying method similar to the NATM method has been attempted instead of the liner plate method. In this spraying method, a retaining layer transported in a pipeline from a pressure feeder via a material supply hose is sprayed on a wall surface of a shaft to form a running layer. After mixing the binder, the material is ejected from the nozzle at the tip blowing section using compressed air. However, this air pressure type nozzle spraying method has the disadvantages that the working environment inside the mine is deteriorated by dust and noise, and there are many inconveniences such as rebound of material, and it has not been established as a general method especially for small diameter shafts .

[0003] In order to solve the above-mentioned problems, the present applicant has proposed various types of lining devices including the shaft lining device disclosed in Japanese Patent Application Laid-Open No. 8-246475. Was. These lining devices are designed so that the earth retaining material is accelerated and projected by a rotary projecting means such as an impeller and the like, so that the above-mentioned dust, noise and rebound can be largely suppressed because no compressed air is used. .

[0004] In the case of such a lining device, the stirring ability in the mixing section greatly affects dust and rebound and the early strength of the lining layer, and also causes a problem of blockage due to solidification of residual concrete. ,
A proposal regarding a lining device in consideration of this point is also made by the present applicant in Japanese Patent Application Laid-Open No. 9-125864. This lining device mixes the earth retaining material with the quick-setting agent while lowering it by the action of gravity, so that the concrete is smoothly discharged without stagnation, and is excellent in preventing blockage troubles, and the inside of the lining device is excellent. Since the stirring member is not filled with the fastening material, the stirring member can be operated at high speed, and has an extremely high stirring ability.

[0005]

The earth retaining lining device according to the present invention forms a series with the above proposal.
In particular, to improve the point where concrete left in the concrete inlet hardens due to the hardening agent containing the quick-setting agent and narrows the concrete inlet, and to have a structure that can further suppress blockage troubles It is intended for.

[0006]

In order to achieve such an object, the present invention introduces both a cement-based earth retaining material and a quick-setting admixture in a fluid state at the upper end of a vertical cylindrical casing. A mixing section for mixing the earth retaining material introduced through the introduction port with the quick-setting agent by means of stirring while lowering the inside of the casing by the action of gravity; and The configuration of a retaining lining device having a projecting section for projecting the retaining material mixed with the agent toward the excavation wall surface, the upper end side of the casing of the mixing section, the retaining material and the quick-setting agent A barrier was provided for feeding separately to the stirring means. according to this,
Since the quick-setting agent sent from the quick-setting agent inlet is blocked by the barrier and cannot directly adhere to the periphery of the material inlet, the earth retaining material staying near the material inlet includes the quick-setting agent. Curing can be suppressed.

In particular, it is preferable that the barrier is suspended from the top wall of the casing such that the lower end thereof is located below the inlet of the earth retaining material. According to this, since the descent of the quick-setting agent or the retaining material is not hindered by the barrier, it is possible to prevent the quick-setting agent or the retaining material from staying. And even if there is a soar of the quick setting agent, it is sufficient that the lower end of the barrier is located sufficiently below the material introduction port,
Further, even if the earth retaining material containing the quick-setting agent jumps up due to the stirring operation by the stirring member, the stirring member and the material introduction port only need to be sufficiently separated up and down, so that the quick-setting agent can easily enter the material introduction port. Can not be reached.

In addition, the barrier is formed concentrically with the casing so as to surround the inlet for the quick-setting agent, and a first wiping member for an outer peripheral surface of the barrier, It is preferable that at least one of a second wiping member and an inner peripheral surface of the casing including an agent introduction port is extended from the stirring means. According to this, the earth retaining material attached to the outer peripheral surface of the barrier and the inner peripheral surface of the casing can be scraped off. In addition, since these wiping members are extended from the shaft member and rotated in conjunction with the shaft member, a dedicated drive mechanism is not required, and the configuration can be simplified.

Further, the stirring means is constituted by a shaft member arranged on the center line of the casing of the mixing section, and a plurality of stirring members projecting radially from the shaft member.
It is preferable that the stirring member is protruded to a position close to an inner peripheral surface of the casing. According to this, the earth retaining material adhered to the inner peripheral surface portion of the casing provided with the stirring member is scraped by the stirring member, and the upper inner peripheral surface of the casing which cannot be wiped by the stirring member is the second wiping member. By doing so, the inner peripheral surface of the casing can be wiped over substantially the entire area.

In addition, it is preferable that the shaft member is made of a hollow material having a relatively large diameter. According to this, the peripheral speed of the shaft member surface increases, and a large centrifugal force acts, so that concrete can be prevented from adhering to the surface, and
Since the speed of the stirring member also increases, the stirring efficiency can be increased. In addition, since the vibration of the shaft member is effectively suppressed, the vibration of the wiping member supported by the shaft member is suppressed, and a smooth wiping operation can be performed. Furthermore, if the shaft member is formed to have a larger diameter than the barrier, the earth retaining material is less likely to adhere to the inner peripheral surface of the barrier, so that a wiping member corresponding to the inner peripheral surface of the barrier is not particularly required.

In addition, the projection unit includes an impeller having a plurality of blades interposed between a pair of disks, an endless belt wound around the outer periphery of the impeller, and a part of the impeller. It is preferable to have a plurality of pulleys for guiding the endless belt so as to be released. According to this, since the projection direction of the earth retaining material is limited, it is convenient when the earth retaining lining is formed on a flat excavated surface or when a thick lining layer is formed partially. In particular, by mounting on a base machine that can rotate in the circumferential direction around the centerline of the shaft, it is difficult to construct with large-scale vertical shafts because of the restriction of the projection distance of earth retaining material. Lining is possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of an earth retaining lining device constructed according to the present invention. This soil retaining lining device 1 is for forming a concrete retaining lining layer on the inner wall surface of a shaft excavated in the construction of a deep foundation pile, and a mixing section for mixing a quick setting agent with concrete as a soil retaining material. 2 and an impeller 3 for projecting concrete mixed with a quick setting agent on the inner wall surface of the shaft,
It has a motor 5 for driving an impeller mounted on the gantry 4, a quick-setting agent supply device 6, and a quick-setting agent tank 7.

The mixing section 2 includes a casing 8 composed of a vertical cylindrical side wall 8a and a disc-shaped upper wall 8b, a shaft member 9 arranged coaxially with the casing 8, and a radial direction from the shaft member 9. And a plurality of agitating members 10 protruding therefrom. The side wall 8 a of the casing 8 is fixed to the gantry 4.

A material inlet 12 is formed at an upper portion of the side wall 8a of the casing 8, and concrete in a material tank (not shown) provided outside the mine is provided through a material supply pipe 13 connected thereto. Pumped and pumped casing 8
Has been introduced inside.

At the center of the upper wall 8 b of the casing 8, a quick-setting agent inlet 14 is opened, and the quick-setting agent in the quick-setting agent tank 7 is supplied to the casing 8 via the quick-setting agent supply device 6. It is being introduced inside. The quick-setting agent may be either powdery or liquid, and is conveyed from the quick-setting agent supply device 6 to the casing 8 by air flow conveyance. The powdery material may be transported from the quick-setting agent tank 7 to the casing 8 using a flexible screw conveyor or the like having a ribbon-type screw in a flexible tube. It may be conveyed from the device 6 to the casing 8 by pumping or the like.

A cylindrical barrier 16 concentric with the casing 8 is suspended from the periphery of the opening of the quick-setting agent introduction port 14 to a position close to the top of the shaft member 9. It is located below the inlet 12 by a required dimension. As a result, the soaking of the quick setting agent and the stirring member 1
Even if the earth retaining material containing the quick-setting agent jumps up due to the stirring operation by 0, the quick-setting agent does not reach the vicinity of the material inlet 12 and the concrete staying near the material inlet 12 removes the quick-setting agent. It is prevented from hardening.

A plurality of agitating members 10 are arranged at predetermined intervals in the axial direction over the entire length of the shaft member 9 while sequentially changing the protruding angle by 90 degrees. It protrudes to a position close to the surface, and scrapes off the concrete adhering to the inner peripheral surface of the casing 8. The distance between the tip of the stirring member 10 and the inner peripheral surface of the casing 8 is preferably about 2 to 5 mm.

The shaft member 9 is formed of a large-diameter hollow material, and has a substantially conical top. The top of the shaft member 9 has a cylindrical shape as shown in FIG. A first wiping member 17 corresponding to the outer peripheral surface of the barrier 16 having a shape, and a second wiping member 18 corresponding to the inner peripheral surface of the side wall 8 a of the casing 8 are provided. These first and second wiping members 17 and 18 are respectively provided on the outer peripheral surface of the barrier 16 and the side wall 8a.
Are vertically extended at a slight distance from the inner peripheral surface of the shaft member 9, and rotate in accordance with the rotation of the shaft member 9 along these surfaces. Thereby, concrete adhering to the outer peripheral surface of the barrier 16 and the upper inner peripheral surface of the casing 8 that cannot be wiped by the stirring member 10 can be scraped off.

The impeller 3 includes an annular upper plate 20 having a circular hole into which the lower end of the casing 8 is fitted, a disk-shaped lower plate 21 opposed to the annular upper plate 20, and an upper plate 20 and a lower plate. A plurality of blades 22 are radially provided between the blades 21. A pulley 23 is provided on the upper surface side of the upper plate 20 so as to be relatively non-rotatable, and the upper plate 20 is held so as to be rotatable relative to the casing 8 via a bearing inside the pulley 23.

The pulley 23 is connected via a V-belt 25 to a driving pulley 24 connected to the output shaft of the impeller driving motor 5 on the gantry 4. As the impeller driving motor 5, it is preferable to employ a motor of variable rotation speed under inverter control.

At the center of the inner surface of the lower plate 21 of the impeller 3,
A conical support member 26 that supports the lower end of the shaft member 9 and has an enlarged diameter on the lower side is fixedly provided, and the shaft member 9 rotates in conjunction with the impeller 3.

In the main lining device 1 thus constructed, the concrete supplied through the material supply pipe 13 is introduced into the casing 8 having a relatively large diameter from the material introduction port 12 in the upper part of the casing 8. In order to increase the degree of freedom, the casing 8 falls freely without filling the inside of the casing 8. On the other hand, the quick-setting agent from the quick-setting agent supply device 6 passes through the barrier 16, descends from the lower end opening thereof to near the top of the shaft member 9 having a substantially conical shape, and is dispersed in all directions.

The concrete that has fallen from the material introduction port 12 is turned into droplets by the rotating operation of the upper stirring member 10, and the particles of the quick-setting agent floating in the casing 8 adhere to the concrete droplets. Stir and mix at 10. At this time, the concrete is pushed outward by the action of the centrifugal force, and is stirred by the scraping operation at the distal end of the stirring member 10 while descending mainly along the inner peripheral surface of the casing 8. Therefore, the descent speed is relatively low, and a sufficient residence time for obtaining an appropriate stirring effect is secured.

Further, since the casing 8 is not filled with concrete, the shaft member 9 can be rotated at high speed with a small power. In addition, since the shaft member 9 is hollow and formed to have a relatively large diameter, stirring can be performed. The speed of the member 10 is high, and it has an extremely high stirring ability. Therefore, the amount of the quick-setting agent used can be reduced, and the generation of dust due to the excessive quick-setting agent can be reduced, and also the rebound and the early strength of the lining due to the shortage of the quick-setting agent can be prevented.

Further, since the peripheral speed of the surface of the shaft member 9 is high and a large centrifugal force acts thereon, it is possible to prevent concrete from adhering to the surface of the shaft member 9. Further, since the concrete is not filled in the casing 8, the stirring member 1
0 wear is relatively small.

At the time of stirring and mixing the concrete and the quick setting agent,
Concrete adhering to the inner peripheral surface of the casing 8 is scraped off by the tip of the stirring member 10 as described above. Of the concrete scattered above the stirring member 10, concrete adhering to the outer peripheral surface of the barrier 16 is First wiping member 17
What adheres to the inner peripheral surface of the casing 8 is scraped off by the second wiping member 18. Moreover, since these wiping operations are continuously performed, a strong film made of concrete cement is formed on the surface of each member,
Thereby, abrasion can be effectively prevented.

The concrete sufficiently mixed with the quick setting agent is introduced from the lower end of the casing 8 into the center of the rotating impeller 3. And concrete is
After the direction is changed in the direction orthogonal to the axis by the support 26 at the center of the impeller 3 and dispersed in four directions, the impeller 3 moves toward the outer peripheral side along the blade plate 22 by centrifugal force, and from the outer end of the blade plate 22. Released approximately tangentially.

By the way, a pair of connecting members 30 for suspending the apparatus 1 in a shaft is fixedly provided at both ends of the gantry 4. As shown in FIG. 3, hooks at ends of a pair of hanging ropes 29 hanging from a hanging device 28 installed at the pit of the shaft are respectively locked to the connecting member 30.

The suspension device 28 for suspending the apparatus 1 is
A pair of winches 33 for raising and lowering the apparatus 1 and a control panel 34 for remotely controlling the winch 33 and the apparatus 1 are provided on a frame 32 formed by joining a plurality of rod-shaped members together in a lattice. Is mounted. At the four corners of the frame 32, grounding legs 35 are provided so as to be mounted on the ground surface around the shaft.

At the time of actually constructing the lining, first, the suspension device 28 is installed at the entrance of the shaft so that the rotation axis of the impeller 3 of the device 1 is substantially aligned with the center line of the shaft. Then, after lowering the apparatus 1 and positioning it at the lining start position, the impeller driving motor 5 is operated by remote control from the operation panel 34 of the suspension apparatus 28.
After activating the concrete pump outside the mine,
Concrete mixed with a predetermined water / cement ratio and slump value is supplied to the mixing section 2 of the present apparatus 1. At the same time, the quick-setting agent supply device 6 is operated to supply the quick-setting agent to the mixing section 2. Then, the concrete sufficiently mixed with the quick setting agent in the mixing section 2 becomes a small lump and is uniformly discharged from the outer peripheral portion of the impeller 3 over the entire circumference. This concrete collides with the inner wall surface of the shaft and spreads in the form of a thin film, which is successively deposited, and a concrete lining layer having a strong and uniform thickness is formed on the entire peripheral surface of the inner wall of the shaft.
At this time, dust which is generated when the compressed air is used as the blowing medium is not generated, and generation of rebound is suppressed.

While the concrete is projected in this manner, the winch 33 of the suspending device 28 is concurrently projected.
When the apparatus 1 is moved up and down along the center line of the shaft, the projection position of the concrete on the inner wall surface of the shaft by the impeller 3 is displaced up and down, and the concrete lining having a uniform thickness also in the depth direction. The layer can be formed smoothly and efficiently. At this time, a lining layer having a desired thickness can be constructed by appropriately controlling the number of repetitions of the lifting / lowering operation of the device 1 by the winch 33, the number of rotations and the direction of rotation of the impeller driving motor 5, and the like.

FIG. 4 shows a second embodiment of the earth retaining lining device constructed according to the present invention. The soil retaining lining device 41 includes a mixing portion 42 having substantially the same configuration as the mixing portion 2 of the soil retaining lining device 1, and an excavation to flow through the mixing portion 42 to retain the concrete mixed with the quick setting agent. A projection unit 43 for projecting the light toward a wall surface, and a mixing unit 42 provided integrally with the projection unit 43 and an attachment unit 44 for holding the projection unit 43 on a base machine described in detail later.
It consists of In addition, the earth retaining lining device 1
Parts having the same functions as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

The projection unit 43 includes, as shown in FIG.
The impeller 45 having substantially the same configuration as the impeller 3 of the earth retaining lining device 1, the endless flat belt 46 wound around the outer periphery of the impeller 45, and the flat belt 46 guided so that a part of the impeller 45 is released. Four pulleys 47
And a pair of frame plates 4 for pivotally supporting these pulleys 47.
8 and 49, and a pulley driving motor 50 mounted on the upper frame plate 49.

The impeller 45 is supported so as to be rotatable relative to the casing 8 via a bearing, but the pulley 23 as in the impeller 3 is not provided (FIG. 1).
reference). The impeller 45 is driven to rotate in conjunction with a flat belt 46 driven by a pulley driving motor 50 connected to one of the four pulleys 47. It is preferable that the pulley driving motor 50 be capable of rotating at a variable speed and capable of rotating forward and reverse.

An external gear 51 is provided above the upper frame 48.
Are provided so as not to rotate relative to each other, and the frame 48 is supported so as to be rotatable relative to the casing 8 via a bearing on the inner peripheral side. An output gear of a frame driving motor 52 provided on the side of the casing 8 meshes with the external gear 51, and the entire projection unit 43 is relatively rotated with respect to the casing 8 by the frame driving motor 52. You can do it. Thereby, the opening of the impeller 45 can be displaced in the circumferential direction, and the projection direction of the concrete can be adjusted.

A guide body 53 having a substantially triangular cross section is provided between the frames 48 and 49 so as to face the open portion of the impeller 45. The guide body 53 limits the concrete discharge angle and prevents the concrete from scattering over a wide range.

The mounting portion 44 is fixed to the outer peripheral surface of the casing 8. The mounting portion 44 is provided with a pair of upper and lower hinge holes 54 for connecting to an arm of the base machine. By connecting one of these hinge holes 54 to the arm and the other to the actuator, an impeller 45 is formed. Can be moved up and down while being held in a substantially horizontal direction, or turned left and right.

The concrete supplied through the material supply pipe 13 is mixed with the mixing unit 4 in the same manner as the retaining lining device 1.
After the mixture 2 is sufficiently mixed with the quick-setting admixture, it is introduced from the lower end of the casing 8 into the center of the impeller 45 rotating at a high speed, dispersed in all directions by the support 26, and then centrifugally moved to the outer peripheral side. Although it moves, the flat belt 46
In the area where the flat belt 46 is in contact, the concrete moves on the flat belt 46 such that the concrete adheres to the flat belt 46, and when the flat belt 46 is separated from the impeller 45, the concrete is discharged in a tangential direction.

Therefore, when the present apparatus 41 is operated with the opening of the impeller 45 facing the excavation wall to be lined, concrete is projected in small blocks in a predetermined angle range, and the concrete is thickened laterally on the excavation wall. A concrete lining layer having a slight variation is formed with a predetermined width. This concrete lining layer can be formed to a uniform thickness by gradually displacing the projection position in the horizontal direction, and it can be made even more uniform by reciprocating up, down, left, and right. it can.

In the earth retaining lining device 41, similarly to the earth retaining lining device 1, earth retaining lining can be performed on the inner wall surface of the shaft having a circular cross section for the construction of the deep foundation pile. In this case, as shown in FIG. 6, a base machine 61 such as a small shovel is arranged at the bottom of the hole, and earth retaining lining of a shaft having a relatively large diameter is possible.

The base machine 61 is arranged such that the center line of the turning substantially coincides with the center line of the shaft. The concrete and quick-setting agent tanks and pumps are installed outside the mine (not shown), and the concrete and quick-setting agent supply pipes 13 and 62 are connected to the present apparatus 41.

After the arm 61a is operated to position the projection unit 43 of the apparatus 41 at the lining start position, the pulley drive motor 50 is started, and both the concrete pump and the quick-setting agent pump outside the mine are operated. Then, the concrete and the quick setting agent are supplied to the mixing section 42. Then, the projection unit 43
Concrete containing a quick-setting agent is projected from the pit, and a concrete lining layer is formed on the excavation wall surface of the shaft.

While the concrete is thus projected, the arm 61a of the base machine 61 is operated to reciprocate the apparatus 41 up and down. Then, a concrete lining layer having a predetermined width in the circumferential direction is formed over a predetermined height, and further, as shown in FIG. 7, the base machine 61 is gradually turned to shift the projection position in the circumferential direction. By doing so, a concrete lining layer having a uniform thickness over the entire circumference of the inner wall surface of the shaft can be formed smoothly and efficiently. At this time, a concrete lining layer having a desired thickness can be constructed by appropriately controlling the number of repetitions of the vertical movement of the arm 61a of the base machine 61 and the turning speed.

In addition, since concrete can be projected with a certain degree of directivity, the surface of the concrete lining layer can be formed smoothly by intensively projecting into the pit on the excavation wall surface caused by excessive overdigging. Can be. Similarly, by intensively projecting, it is possible to form a portion where the ground is likely to be weakly collapsed to be partially thick.

The construction of the concrete lining on the inner wall of the shaft having a circular cross section has been described above.
The main retaining lining device 41 is not limited to such an application, and is not particularly limited as long as the lining is performed by projecting a retaining material such as concrete onto an excavated wall surface requiring the retaining. For example, the present invention can be applied to a retaining lining on a flat inclined surface.

[0047]

As described above, according to the present invention, the quick-setting agent sent from the inlet for the quick-setting agent is blocked by the barrier and cannot directly adhere to the periphery of the material-introducing port. The hardening of the earth retaining material staying in the vicinity, including the quick-setting agent, is suppressed, and there is a great effect in preventing the narrowing of the earth retaining material introduction port.

In particular, if the barrier is erected so that the lower end of the barrier is located below the earth retaining material introduction port from the top wall of the casing, the drop of the quick-setting agent and earth retaining material is not hindered by the barrier. In addition, it is possible to prevent the stagnation of the quick setting agent and the earth retaining material.

In addition to this, a barrier is formed concentrically with the casing so as to surround the inlet for the quick-setting agent, and a first wiping member corresponding to the outer peripheral surface of the barrier is provided inside the casing. When the second wiping member is extended from the stirring means corresponding to the peripheral surface, it becomes possible to scrape the earth retaining material adhered to the outer peripheral surface of the barrier or the inner peripheral surface of the casing. Moreover, since these wiping members are rotated in conjunction with the shaft member, a dedicated driving mechanism is not required, and the configuration can be simplified. In addition, a strong film made of the cement material of the earth retaining material is formed on the surface of the member by the wiping operation, so that an advantage of effectively preventing abrasion can be obtained.

Further, when the stirring member is protruded to a position close to the inner peripheral surface of the casing, the inner peripheral surface of the casing can be wiped over substantially the entire area together with the second wiping member. Thus, an extremely remarkable effect can be obtained in preventing the blockage trouble.

In addition, when the shaft member is made of a hollow material having a relatively large diameter, the peripheral speed of the surface of the shaft member increases, and a large centrifugal force acts. Therefore, it is possible to prevent concrete from adhering to the surface. In addition to this, the speed of the stirring member also increases, so that the stirring efficiency can be increased. In addition, since the vibration of the shaft member is effectively suppressed, the vibration of the wiping member supported by the shaft member is suppressed, and a smooth wiping operation can be performed.

Further, the projection unit winds the endless belt around the outer periphery of the impeller in which a plurality of blade plates are interposed between the pair of disks, and sets the endless belt so that a part of the impeller is released. In this case, since the direction of projecting the earth retaining material is limited, a desired lining layer can be formed on a predetermined excavation surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a retaining lining device configured according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG.

FIG. 3 is a cross-sectional view showing a state where the earth retaining lining device shown in FIG. 1 is installed in a shaft.

FIG. 4 is a sectional view showing a second embodiment of the earth retaining lining device configured according to the present invention.

FIG. 5 is a cross-sectional view taken along line VV shown in FIG.

6 is a longitudinal sectional view showing a construction state in which the earth retaining lining device shown in FIG. 4 is applied to earth retaining lining on an excavation inner wall of a shaft.

FIG. 7 is a top view showing the construction of the earth retaining lining on the excavation inner wall of the shaft, similar to FIG.

[Description of Signs] 1 Earth retaining lining device 2 Mixing section 3 Impeller 4 Mount 5 Impeller drive motor 6 Quick setting agent supply device 7 Quick setting tank 8 Casing, 8a Side wall, 8b Upper wall 9 Shaft member 10 Stirring member 12 Material Inlet 13 Material supply pipe 14 Quick setting agent inlet 16 Barrier 17 First wiping member 18 Second wiping member 20 Upper plate 21 Lower plate 22 Blade plate 23 Pulley 24 Drive pulley 25 V belt 26 Support 28 Hanging device Reference Signs List 29 hanging cable 30 connecting member 32 frame 33 winch 34 operation panel 35 grounding leg 41 earth retaining lining device 42 mixing unit 43 projecting unit 44 mounting unit 45 impeller 46 flat belt 47 pulley 48/49 frame plate 50 pulley driving motor 51 external gear 52 Frame driving motor 53 Guide body 54 Hinge hole 61 Basema Emissions, 61a arm 62 quick-setting admixture supply pipe

Claims (6)

[Claims] 1. An inlet for a cement-based soil retaining material and a quick-setting agent in a fluidized state is provided at the upper end side of a vertical cylindrical casing, and the soil retaining material introduced through the inlet is gravity-fed. A mixing section that mixes with the quick-setting agent by the stirring means while lowering the inside of the casing by the action of, and a projecting section that circulates through the mixing section and projects the earth retaining material mixed with the quick-setting agent toward the excavation wall surface. A soil retaining lining device comprising: a barrier that separates and feeds an earth retaining material and a quick-setting admixture to the stirring means on an upper end side inside the casing of the mixing unit. Earth retaining lining equipment. 2. The retaining lining according to claim 1, wherein the barrier is suspended from a top wall of the casing such that a lower end thereof is located below an inlet of the retaining material. apparatus. 3. The barrier is formed in a cylindrical shape concentric with the casing so as to surround the inlet of the quick-setting agent, and a first wiping member to an outer peripheral surface of the barrier and introduction of the quick-setting agent. 3. The stirrer according to claim 1, wherein at least one of a second wiping member and an inner peripheral surface of the casing including a mouth extends from the stirring means.
An earth retaining lining device according to item 1. 4. The stirring means is constituted by a shaft member disposed on a center line of a casing of the mixing section, and a plurality of stirring members projecting radially from the shaft member. The earth retaining lining device according to any one of claims 1 to 3, wherein the earth retaining lining device is projected to a position close to the inner peripheral surface. 5. The retaining lining device according to claim 4, wherein the shaft member is made of a hollow material having a relatively large diameter. 6. An impeller in which a plurality of blades are interposed between a pair of disks, an endless belt wound around an outer periphery of the impeller, and a part of an inner space of the impeller is released. The earth retaining lining device according to any one of claims 1 to 5, further comprising a plurality of pulleys for guiding the endless belt so as to be operated.