KR101007587B1 - Super slurry type pipe jack and shield jointary method and tunneling machine - Google Patents

Abstract

PURPOSE: A super slurry type pipe jack and shield jointary method and a tunneling machine therefor are provided to form a film layer on the inner surface of a tail void and to reduce lubricant consumption. CONSTITUTION: A super slurry type pipe jack and shield jointary method is as follows. A muddy water composite, formed by mixing silica, glass fiber, and pulp fiber, from multiple muddy water injection ports is injected into excavation soil. A film layer is formed on the inner surface of a tail void(6) by mixing the muddy water composite with the excavation soil. A mud film layer is formed in the inner side of the film layer by injecting a toil void lubricant into the tail void.

Description

Super Slurry Type Pipe Jack and Shield Joint Method and Tunneling Machine}

According to the present invention, in the propulsion method, particularly in the semi-shield method for constructing pipelines in the ground, it is possible to reduce the frictional resistance generated when the propulsion pipe is propelled, to enable efficient and low-cost propulsion for long distances. Even when the propulsion method is no longer possible due to the high pressure, it is possible to switch to the shield method in the ground in a short time so that the excavator can move forward with its own force, safely and reliably while assembling the segment like the propulsion pipe. It is related to the two-stage propulsion and shield joint method.

The semi-shield construction method, which is a promotion construction method, is adopted as a construction method for constructing a pipeline for storing sewage facilities and various underground burial grounds in the underground. This semi-shielding method is provided with a circular pressure jockey and a reaction force support shelf in the oscillation granules as is known, and pressurizes a semi-shielded excavator that operates and continuously presses the propulsion pipe (fume pipe) with the hydraulic pressure jack. Entering, excavating by the excavator and ground compaction and indentation of the propulsion pipe are repeated, and the excavator is taken out in the reach shaft to build a pipeline in the ground as the propulsion pipe.

However, in the semi-shield method, in order to realize long-distance propulsion, it is most important to reduce the frictional resistance generated between the propulsion pipe inserted in the back pressure state and the natural ground. The frictional resistance also increases in proportion to the progression of the propulsion extension, and a large propulsion force is required when the propulsion extension is prolonged, which causes a limit in the strength of the propulsion pipe.

In the conventional semi-shield method, the general method of reducing frictional resistance between the propulsion pipe and Jisan eliminates the overcut when pushing the semi-shield excavator and the propulsion pipe following it in the ground, and continuously injects high-purity lubricant from the periphery of the propulsion pipe. Therefore, the thrust has been reduced in accordance with the theory of converting sliding friction into rolling friction. In addition, a high-strength pipe having a high internal pressure of the propulsion pipe main body is used for the propulsion pipe to support long distance propulsion.

However, the use of high-purity, expensive lubricants alone cannot guarantee long-term, and they cannot prolong long distances because they cannot cope with various soil changes or groundwater pressure changes that occur during the propulsion process.

In addition, the use of high-strength pipes is inexpensive to use expensive high-strength pipes for the entire length in a situation where a construction method in accordance with a limited budget is required, and there is a duty to use a cheap propulsion pipe depending on the purpose.

In addition, it is very uneconomical to stop the construction in case of high force in the oscillation granules and to use auxiliary methods such as reinforcement of acupressure wall and its rear part.

For this reason, the propulsion method can be secured for a long time over the entire length of the propulsion tube without the need to actively excavate the strong acid by actively utilizing the tail void, which has been passive in the conventional method, and can reduce the frictional resistance during propulsion. This is necessary.

As an example of the conventional propulsion method which actively uses tail voids, Japanese Patent No. 3439341 is mentioned. The present invention is a propulsion method for forming a tail void around a propulsion tube with an overcut function and a successive propulsion tube in the ground, and by the excavation of the excavator. The mud film layer of the dual structure which consists of a mud film layer produced by the tail void lubricant pressed into the tail void from the multiple lubricant injection hole of the porous pipe which the membrane | film | coat layer which generate | occur | produced in the curved part and the propulsion pipe connected in the middle By forming the structure, the tail void lubricant layer is secured to the outer circumference of the propulsion pipe to achieve a long term reduction of the propulsion resistance.

However, in the propulsion method as described above, the membrane layer formed on the inner circumferential wall of the tail void has a mud film layer formed on the inner circumference of the membrane layer with a tail void lubricant to secure a tail void lubricant layer. Filling is required, but when excavating with an excavator, the excavation soil is low in order and even when supplied to the tail void, the formation efficiency of the membrane layer is very poor. Because of this, the press-in tail void lubricant penetrates into the nitric acid through the barrier layer before generating the thickening effect on the barrier layer, so that the tail void lubricant cannot effectively make use of the thickening effect of the tail void lubricant and also generates a large amount of tails until the mud film layer is generated. There is a problem that voids need no void lubricant.

Therefore, in order to form a membrane having a water-repellent layer, the excavated soil generated by the excavator is mixed with wood-healing materials such as powdered clay, a thickener, or finely cut old newspaper to help the formation of the membrane layer by the excavated soil. However, the soil particle composition of the excavated soil forming the two-layer layer is a mixture of large gravel, small gravel, water, sand, air, silt and the like, as shown in Fig. 7 (b), because it is water permeable or permeable It is practically difficult to form a barrier layer itself, and it is difficult to obtain sufficient degree of orderability by the heeling effect even when such crushed soil is mixed with wood lumber such as the above-mentioned powder clay, thickener or finely cut old newspaper. . Therefore, it is not possible to effectively implement the heel effect on the tail void lubricant.

Therefore, when the press-in of the tail void lubricant is stopped, the tail void lubricant penetrates into the acid, making it difficult to maintain the tail void lubricant on the outer periphery of the propulsion tube. Economic contact loss due to mass consumption if contacting the outer circumference and this increases the resistance to propulsion, making it difficult to propel the actual long distance and continuing indentation of the tail void lubricant to normally secure the tail void lubricant layer. This problem is larger.

Therefore, in order to solve the above-mentioned problems, the present invention thoroughly improves the stirring efficiency in mixing the excavated soil and the nisu water by the propeller to increase the fluidity, and pressurizes the uniformly mixed excavated soil to the tail void. In addition, it is possible to form a two-layer film having an improved heeling effect on the inner circumferential surface of the tail void, and by forming a mud film layer on the inner side of the two-layer film with the injected tail void lubricant, thereby extending the tail over the entire outer circumference of the propulsion tube. The present invention provides a two-pronged type propulsion and shield jointing method capable of securing a void, significantly reducing the consumption of a tail void lubricant, and reducing the frictional resistance during propulsion to perform long-distance propulsion.

In order to solve the above problems, according to the two-stage propulsion and shield joint method of the present invention, when the propulsion pipe is propelled in the ground, the shear of the excavator using an excavator having an overcut function and an excavation soil stirring zone The tail void is formed around the propulsion pipe by active excavation by the excavator, and the needle is sprayed about 50% of the excavated soil from the plurality of needle spray holes provided at the cutter tip of the excavator toward the excavation surface. It was rotated at high speed, and the slump value 25cm, panel value 45sec, specific gravity 1.5 of stirring and mixing of the number and the excavated soil were sufficiently kneaded into the excavation chamber through the stirring zone having the stirring efficiency by the plurality of inner bits at the rear end of the cutter. The excavated earth is introduced into the tail void and penetrated into the inner circumferential surface of the tail void by the kneaded nisu and the wood ash included therein. It is designed to reduce the propulsion force of the propulsion pipe by roughening the membrane layer formed by the adhesion between the soil particles.

In addition, according to the two-stage propulsion and shield joint method of the present invention, the excavator is provided with a single or multiple rows of vane-pinch valves at the rear of the vane pipe installed in the partition plate, and the excavator is agitated the excavation soil and the needle water. By blowing into the excavation chamber through the air, it produces | generates the high fluidity | liquidity and discharges it into the chamber by the said vane-pinch valve using the pressure difference which set the upper limit and the lower limit to the field pressure.

According to the two-pronged propulsion and shield joint method of the present invention, the vane discharged in the cabin of the excavator is introduced into the chamber having the upper surface open, and the large gravel is removed by the screen, and the vacuum generator provided on the ground In order to control the suction amount of the manifold when the vacuum is transported through the manifold pipe to the ground, a valve is provided at the chamber suction port, and the valve is opened and closed by the upper and lower limit sensors to intermittently transport the vane to the manifold pipe. Provide a plurality of air inlet valves in a predetermined portion of the vane pipe, and shorten the vane zone in the pipe by opening and air cutting the air inlet valve with a length of 2.0 m for the long length of the vane in the vane pipe. It is.

According to the two-pronged propulsion and shield jointing method of the present invention, a combination needle water is injected into the tail voids using a propulsion tube, and a new mud film layer is formed inside the membrane layer and the inside thereof to protect the tail voids for a long time. It is to be formed in two layers.

According to the two-pronged propulsion and shield jointing method of the present invention, the combination nisu is formed by mixing 1 to 3 kg of silica sand, 1 to 2 kg of glass fiber and 1 to 3 kg of pulp fiber, respectively, with respect to 500 L of the number of needles. It is to use one.

According to the two-stage propulsion and shield joint method of the present invention, the excavator having the overcut function and the stirring function is provided with an independent shield cylinder unit in which a segment for installation is built in a rear portion thereof in a form protruding to the outside of the apparatus. The propulsion pipe connected to the shield cylinder unit is pushed into the ground by the propulsion method, and when the thrust of the propulsion method is limited, the propulsion method is stopped and converted to the shield method in a short time. It was operated to advance the excavator and to construct the pipeline using segments of the same diameter as the propulsion pipe at the tip of the propulsion pipe.

According to the two-stage propulsion and shield joint method of the present invention, the shield cylinder unit is provided with a release joint connecting a propulsion pipe having a different outer diameter and a mounting segment, and when switching to the shield method to build a pipeline with segments, The joint is separated from the shield cylinder unit and is left in the connection part of the propulsion pipe and the installation segment, and the pipeline is constructed so as to continue to the installation segment by the shield method.

According to the two-stage propulsion and shield joint method of the present invention, a sealing material is injected into the fitting portion of the release joint, the propulsion pipe fitted thereto, and the installation segment, and the connection portion of the propulsion pipe and the installation segment even under high water pressure. Is the exponential phase (止水 狀).

The excavator used in the two-stage propulsion and shield joint method of the present invention is provided with a plurality of needle water injection holes for injecting the needle water from the cutter tip in an excavator having an overcut function and an excavation soil stirring zone, and the rear of the cutter for high speed rotation. By installing a plurality of inner bits, the agitated zone is provided from the excavation surface to the excavation chamber, which can generate a high-flowing excavated soil due to the pressure difference to the tail void, and also has a vane valve device for groundwater pressure to provide surplus volume. To be discharged into the cabin.

Excavator used in the two-stage propulsion and shield joint method of the present invention is installed in an excavator having an overcut function and an excavation soil stirring zone, and is provided with a shield cylinder unit for converting from the propulsion method to the shield method in a short time. The unit contains a plurality of segments in advance, one end of which is protruded to the outside of the device, and compactly gathers the inside of the collector, propulsion jockey, hydraulic unit, segment assembly space, and tail seal necessary for the shield method. By miniaturizing the function, the semi-shielded excavator for the propulsion method can be utilized, and it is possible to switch to the shield method at any time even in a narrow cabin by simply mounting the rear of the propeller.

Excavator used in the two-stage propulsion and shield joint method of the present invention, when converting from the propulsion method to the shield method, post-injection material injection is required after assembling one ring, the post-injection material injection pipe in the shield cylinder unit It was installed in the form of half-buried along the propulsion axial direction to the outside of the skin plate, and it was designed to immediately inject the post-entry material applied with pressure in a short time.

The two-pronged propulsion and shield joint method of the present invention is formed by using a two-layer film and other materials and methods on the tail voids formed on the outer periphery of the propulsion pipe by using the excavator having the above-cut function and the excavation agitating zone. The mud film layer which protects a film layer, and the formation means of the two layer layer which form a two-layer layer, and the conversion from the propulsion method to operate in the case of the above-mentioned unforeseen situation to a shield method are used together.

Here, the cutter of the excavator rotates at about twice the speed as before, and a plurality of needle water injection holes are provided at the outer circumference thereof, and the needle water is injected at a pressure of ² to 3 kg / cm ² from the needle water injection hole toward the site. At the same time, an excavation chamber for stirring and mixing excavated soil and needle water introduced between the rear portion of the cutter and the partition plate with a plurality of inner bits to actively generate a uniform excavated soil with high fluidity is provided. This ensures that the stirring zone is secured to pressurize and fill the tail voids with high fluidity excavated soil generated in the excavation chamber, thereby forming a high quality membrane layer on the inner circumferential surface of the tail voids by the pressure balance of the excavated soil.

As the membrane layer formed by the excavated soil is mixed with the above-mentioned wood hill material, the water-repellency is improved by the wood hill effect between soil particles, and when the tail void lubricant is pressed into the tail void, the tail void lubricant becomes difficult to pass through the membrane layer. As a result, the inner circumferential surface of the membrane layer and the tail void lubricant penetrating into the inner circumferential surface form a mud film layer, which maintains the tail void lubricant on the outer circumference of the propulsion tube by the two-ply layer of the membrane layer and the mud film layer. It is possible to reduce the increase in frictional resistance when pushing the propulsion pipe.

According to the present invention, by using an excavator having an overcut function and a stirring zone, the fluidity of the excavated soil can be increased and homogenized even though the same number of niches is used as in the prior art. It is possible to form a high-quality membrane layer with excellent effect, to keep the tail void lubricant pressed into the tail void from penetrating into the acid, and effectively utilizes the grabbing effect on the membrane layer of the tail void lubricant, and the tail on the inner circumferential surface of the membrane layer The mud film layer can be formed by the void lubricant, and by the two-ply layer of the mud film layer and the mud film layer, the tail void filled with the tail void lubricant over the entire outer circumference of the propulsion tube can be secured for a long time, thereby prolonging the propulsion resistance. Long distance propulsion can be realized by the reduction over time.

In addition, the combination and compounding ratio of silica sand, glass fiber, and pulp fiber employed as the necking material synergistically fills the gap between the soil particles which become the solid of the membrane layer, so that the effect of the soil particle between the membrane layers is excellent, and the tail void lubricant is applied to the tail void lubricant. The new mud film layer can be reliably formed in the inner circumference of the film layer.

Furthermore, when the propulsion method falls into excessive propulsion, it is possible to construct a long distance pipeline by switching to the shield method in a short time.

1 is a vertical front view showing the overall structure of the two-stage propulsion and shield joint method according to an embodiment of the present invention.
Figure 2 (a) is a longitudinal front view of the propeller used in the two-stage propulsion and shield joint method according to an embodiment of the present invention, (b) is a longitudinal front view of the shield cylinder unit.
Figure 3 is an enlarged longitudinal cross-sectional view showing the tip structure of the excavator of the two-stage propulsion and shield joint method according to an embodiment of the present invention.
Figure 4 is an enlarged vertical front view showing the structure of the shield cylinder unit and the post-filling material injection tube provided in the two-type propulsion and shield joint method according to an embodiment of the present invention.
Figure 5 is an enlarged vertical front view showing a portion of the post-fill material injection pipe portion of the two-stage propulsion and shield joint method according to an embodiment of the present invention
Figure 6 is a longitudinal side view showing an enlarged portion of the post-filling material injection pipe portion of the two-stage propulsion and shield joint method according to an embodiment of the present invention
Figure 7 (a) is a cross-sectional view of the porous pipe used for injecting the tail void lubricant in the two-stage propulsion and shield joint method according to an embodiment of the present invention, (b) is a two-layer film formed on the tail void It is an expanded sectional view which shows the double structure of a mud film layer inside.
(A) to (c) is a cross-sectional view showing in sequence the operation sequence of the vane-pinch valve of the two-stage propulsion and shield joint method according to an embodiment of the present invention, (d) opening and closing the vane pinch valve It is explanatory drawing of the cycle.
9 is an explanatory view showing the vane vacuum transport of the two-stage propulsion and shield joint method according to an embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with attached drawing.

As for the propulsion method, as shown in FIGS. 1-3, the propulsion pipe 3 which is continuous from the oscillation granule toward the ground, the propulsion pipe 3 which continues in the rear part of this casing 1, and the casing 2, and a propulsion pipe When the porous tube 4 incorporated at (3) at predetermined intervals is press-fitted with a circular pressure jockey, it is constructed while entering the ground by the excavation action of the cutter (5), which becomes the shear excavator of the excavator (1).

The excavator 1 is to form a tail void 6 of about 30 mm on the outer periphery of the propulsion pipe 3 by the overcut function of the cutter 5 and at the front of the cutter 5. A plurality of needle water injection holes 7 opened in the side center portion or the outer circumferential portion thereof, and a plurality of inner bits 9 having different lengths of excavated soil and needle water introduced between the rear portion of the cutter 5 and the partition plate 8. ) To provide an excavation chamber 10 which is agitated and mixed to actively generate excavated soil having high fluidity, and secures the stirring zone X by the cutter 5 and the excavation chamber 10.

The site at the time of excavation by the bit of the cutter 5 which connected the needle water injection port 7 of the cutter 5 and the ground water supply device 11 to the canine pipe 12 and rotated about twice as fast as before. Injecting the combination needle number a to improve the excavation efficiency, and at the same time, the excavated soil flows into the excavation chamber 10 from the inlet of the cutter 5 and rotates in the excavation chamber 10. By stirring and mixing the excavated soil with (9), a highly fluid excavated soil having a slump value of 25 cm, a panel value of 45 sec, and a specific gravity of 1.5 is uniformly generated, and this highly excavated excavated soil is subjected to a tail void. (6) is pressurized.

The combination nisu (a) is a mixture of silica sand, glass fiber, and pulp fiber as a wood material for excavation soil, and the high flowability nithium produced by stirring and mixing the combination nisu (a) and excavation soil with an inner bit (9). The film is excellent in the film forming effect when the tail void 6 is pressurized and can reliably form the film layer b shown in FIG. 7 with respect to the inner circumference of the tail void 6.

The combination nisu (a) was formed by mixing 1 to 3 kg of silica sand, 1 to 2 kg of glass fiber and 1 to 3 kg of pulp fiber according to the soil, respectively, for 500 l of excavated soil. The combination of silica sand, glass fiber, and pulp fiber fills the gap between soil particles which become solid in the inner circumference of the tail void 6 by the effect of pinching, thereby effectively forming the membrane layer b on the inner circumference of the tail void 6. By this membrane layer (b), the degree of order of the inner circumference of the tail void 6 can be improved.

The porous pipe 4 incorporated in the connected state between the propulsion pipe 3 is provided so that the injection hole 13 penetrates in and out at predetermined intervals on the main wall as shown in FIG. The distribution pipe 14 arrange | positioned is connected to each lubricant injection hole 13, The lubricant supply pipe 15 is connected to this distribution pipe 14 via the solenoid valve 16, and the ground is opened by opening the solenoid valve 16. FIG. The tail void lubricant (c) supplied from the lubricant supply device is simultaneously injected into the tail void (6) from each lubricant injection hole (13).

Lubricant (c) has no pollution to human body, animals and plants, and the earth, and exhibits a grabbing effect between soil particles, so that the mud film layer (d) is quickly formed inside the membrane layer (b) on the inner circumferential surface of the tail void (6). This function is to maintain the hydraulic pressure in the tail void (6).

At the time of excavation of the excavator 1, the excavated soil and the combined needle water a are stirred and mixed in the excavation chamber to make an excavated soil having high fluidity, and the excavator is press-filled into the tail void 6 to provide a tail void. (6) By forming the membrane layer (b) in the inner circumference, and then injecting the tail void lubricant (c) into the tail void (6) from the porous tube (4) incorporated in the middle of the propulsion pipe (3), FIG. As shown in FIG. 4, a new mud film layer d is formed inside the membrane layer b. The two-layer rough wall formed by such a film layer (b) and a mud film layer (d) is excellent in the degree of ordering.

The two-ply rough wall can reliably prevent the acid leakage of the tail void lubricant (c) press-fitted into the tail void (6), and the tail void lubricant (c) also has a grabbing effect on the film layer (b). The mud film layer d can be reliably formed inside the membrane layer b by the tail void lubricant c that tries to penetrate into the inner circumference of the membrane layer b by the bilateral rolling effect. The tail void lubricant (c) press-fitted into the tail void (6) is maintained so as not to penetrate the acid, and during the propulsion, the hydraulic pressure of the tail void lubricant (c) is maintained for a long time in the propulsion, and the resistance at the time of propulsion is maintained for a long time. Can be reduced over time.

In the rear of the vane pipe 17 provided in the partition plate 8 of the excavator 1, the vane pinch valve 18 is arrange | positioned in single or multiple rows, and the The excess fluid of the highly fluid banney produced in the excavation chamber 10 is discharged into the upper opening chamber 19 by using the vane pinch valve 18.

The vane-pinch valve 18 provides a cylindrical rubber valve 18b inside a cylindrical valve case 18a, and the air tank 20 and the air regulator 21 in the cylindrical valve case 18a. By blowing a pressure air of about 2.0 kg / cm ² by using a pressure, the cylindrical rubber valve 18b is pressurized from the surroundings to automatically control the outflow of the excess banned water under pressure, and at the same time the inside of the excavation chamber 10 and the field surface. It is to maintain the pressure of (切 羽 面).

8 (a) to 8 (c) show the vane operation of the vane pinch valve 18. The internal pressure of the cylindrical valve case 18a is set slightly higher than the water pressure of the groundwater, and the vane in the excavation chamber 10 is shown. When the pressure of the excess waste water flowing out into the pipe 17 rises, the cylindrical rubber valve 18b is pressurized and opened as shown in Fig. 8 (c) from Fig. 8 (b), which causes the pressure in the excavation chamber 10 to flow out. When this decreases, the cylindrical rubber valve 18b is closed, and the excess vane is sequentially extruded by repeating this. Since the vane pinch valve 18 automatically opens and closes the cylindrical rubber valve 18b to discharge the excess vane into the chamber 19, the cylindrical rubber valve of the vane pinch valve 18 is flat as shown in FIG. 8 (d). By opening and closing in the pressure range slightly higher than the water pressure of the groundwater in the city, pressure in the excavation chamber 10 and the site surface is maintained.

The vane-pinch valve 18 may be used in a single stage, but may be arranged in a plurality of rows as shown in FIG. 3, and in the case of a plurality of rows, the excavation chamber may be used when large gravel is mixed in the excess vane. The interior is never opened.

The chamber 19 is connected to a vane pipe 22 for transporting air to the ground, and the receiver tank 24 from the front end side of the inside of the vane pipe 22 with the vacuum generator 23 disposed on the ground. The suction cap is sucked by using to suck the vane in the chamber 19 and is taken out by vacuum transport. An upper limit of the upper end of the valve 19 is provided in the inlet port of the vane pipe 22. The valve 25 is opened and closed by an over-low load detection sensor 26 or 27 to intermittently take out the vane.

As shown in Fig. 9, when the vacuum is transported through the vane pipe 22 to the ground as described above, the weight ratio of the vane water is limited, so that a plurality of air is provided at a predetermined position of the vane pipe 22 to adjust the suction amount. The vane zone in the pipe is provided by installing the inlet valve 28 and limiting the length of the vane 22 in the vane pipe 22 to a range of 2.0 m in length, opening the air inlet valve 28 and air cutting the vane. Is shortening.

As shown in FIG. 2, the excavator 1 has an independent shield cylinder unit 32 in which a part 31 for installation is mounted in the rear portion thereof in a form protruding from the outside of the apparatus. The propulsion pipe 3 connected to the unit 32 enters the ground by the propulsion method, stops the propulsion method when the thrust of the propulsion method is limited, switches to the shield method in a short time, and the shield barrel unit 32 The propulsion jockey (33) in the inside) can be operated to advance the excavator (1), and the pipeline can be constructed by using a segment 31 having the same diameter as the propulsion pipe (3) at the tip of the propulsion pipe (3). It is supposed to be.

The shield cylinder unit 32 is provided with a release joint 34 connecting the propulsion pipe 3 having a different outer diameter and the installation segment 31, and switches to the shield construction method to build a pipeline with the segment 31. In this case, the release joint 34 of the socket having a different outer diameter is separated from the shield cylinder unit 32, and remains in the connection portion between the propulsion pipe 3 and the installation segment 31, and the installation segment 31 is formed by the shield method. The pipeline is built in a continuous manner.

As shown in Figs. 4 to 6, the fitting portion of the release joint 34, the propulsion pipe 3 fitted thereto, and the installation segment 31 is formed in a seal structure so that the propulsion pipe 3 and the installation can be installed under high water pressure. The connection part of the segment 31 is made into the exponential shape, and at the same time, it is the front-back position between the skin plate of the shield cylinder unit 32, and the installation segment 31, and the skin plate and the installation segment 31 are carried out. The sealing member 35 which keeps water tightly between is provided, and the sealing material is inject | poured between these sealing members 35. As shown in FIG.

In addition, when the shield cylinder unit 32 is switched from the propulsion method to the shield method, the post-fill material is injected into the outer circumference of the segment ring 31 every time after the assembly of one ring, and the post-fill material is injected to solidify the outer circumferential surface. The pipe 36 is provided in such a manner that half is embedded in the skin plate along the propulsion axis direction to the outside of the skin plate of the shield cylinder unit 32.

Next, the construction method of the two-stage propulsion and shield joint method according to the present invention will be described.

From the oscillation shaft to the ground, the excavator 1 and the casing 2 of the excavator 1 are incorporated into the propulsion pipe 3 continuous to the rear part and the propulsion pipe 3 at predetermined intervals. When the perforated pipe 4 is press-fitted with the original pressure jockey, the cutter 5 of the excavator 1 enters the ground by the excavation action, and the propulsion pipe 3 is sequentially connected and press-fitted to build a pipeline. The tail void 6 continuous from the skin plate 2 outside of the excavator 1 to the outside of the propulsion pipe 3 is formed by the overcut function and stirring function by the overcut function of 5).

At the time of the excavation action by the cutter 5 of the excavator 1, the needle water a is supplied toward the field from the plurality of needle water injection ports 7 provided in the cutter 5, and this needle water a Is sprayed toward the site, and the mixed water and agitated in the excavating soil, and the material is obtained by injecting and mixing the water and the fine water (a) into the excavated soil in the inner peripheral surface of the tail void 6 in the stirring zone (X) The film layer (b) is formed.

The membrane layer (b) improves the shear effect because the necking material becomes solid and fills the gap between the soil particles, and makes the membrane layer (b) a water repellent, and together with the formation of the membrane layer (b). The tail void lubricant (c) is press-fitted into the tail void 6 from each lubricant injection hole 13 of the porous pipe 4 connected between the propulsion pipes 3.

As described above, due to the press-in pressure of the tail void lubricant (c) into the tail void 6, the membrane layer b is pressed to the inner circumferential surface of the tail void 6 to become a layer having a predetermined thickness. The tail void lubricant (c) is prevented from leaking to the acid by the necking effect of the c), and at the same time, the degree of order of the membrane layer (b) is increased by the necking effect of the tail void lubricant (c). In addition, the tail void lubricant (c) effectively prevents the penetration of the tail void lubricant (c) into the acid, and as shown in FIG. 7 (b), the tail void lubricant (c) penetrating into the inner circumference of the membrane layer (b) forms the mad film layer (d). The two-layer structure of the mud film layer (d) and the film layer (b) is maintained so that the tail void lubricant (c) press-fitted into the tail void 6 does not penetrate into the acid.

In this way, during the propulsion of the propulsion pipe 3 by the membrane layer (b) and the mud film layer (d) with improved water repellency, the hydraulic pressure of the tail void lubricant (c) is maintained for a long time over the entire length, By securing the tail void 6 in contact with the tail void lubricant c on the outer circumferential surface of the propulsion pipe 3, the resistance at the time of propulsion can be reduced in the long term, thereby enabling long-distance propulsion.

Further, in the construction of the pipeline by press-fitting into the ground of the propulsion pipe 3, the tail void 6 is formed by forming a water-repellent two-layered film b having an effect of being pinched on the inner circumferential surface of the tail void 6. The mud film layer d can be reliably produced in the inner circumference of the membrane layer b with the tail void lubricant (c) press-fitted therein, and the tail void with the tail void lubricant (c) in contact with the outer circumference of the propulsion pipe 3. (6) can be secured, and the resistive force which arises at the time of the propulsion of the propulsion pipe 3 can be reduced reliably.

The excess vane in the excavation chamber 10 is automatically taken out to the chamber 19 by opening and closing the vane pinch valve 18, and opening and closing of the valve 25 by the upper and lower limit detection sensors 26, 27. Is taken out to the ground by vacuum transportation using the manifold 22.

Even if the tail void 6 is actively secured and stabilized as described above, it is a difficult point of the propulsion method that the accident rate does not disappear. In the conventional method, when the excessive propulsion force falls into the propulsion force, there is no final means, and at most, the propeller is dug in the middle. Is recovering.

In addition, the worst case is when the propulsion method is stopped just below the road due to traffic crossing, river crossing, traffic congestion in the urban area. That is, it can be said that the propulsion method is limited only by securing the above-mentioned tail void.

Therefore, the two-pronged type propulsion and shield joint method according to the present invention is carried out by the propulsion method up to the threshold of thrust, stops the propulsion method when the threshold is reached and terminates the post-filling material injection to the propulsion pipe (3) and remain In order to switch to the shield method in the ground immediately in the middle, instead of the propulsion method, as the inner diameter assembles the segments 31 of the same diameter as the propulsion pipe 3, only the excavator 1 moves forward by itself, making it safe and secure. It is to use the propulsion conversion technology that can reach the arrival shaft.

1..Excavator 2 .. Casing 3 ..
4..Perforated tube 5..Cutter 6..Tail void
7..Neesu nozzle 8..Bulk plate 9..Inner bit
10. Excavation chamber 11. Feeder 12. Canine pipe
13..injection hole 14..distribution pipe 15..lubricant supply pipe
16. Solenoid valve 17. Bunny tube 18. Bunny pinch valve
19.Chamber 20.Air tank 21.Air regulator
22.Banner pipe 23.Vacuum generator 24.Reservoir tank
25. Valve 26. Soil detection sensor 27. Soil detection sensor
28..Air introduction valve 31.Installation segment 32.Shield box unit
33. Propulsion jockey 34. Release joint 35. Seal member
36..Post-fill material injection tube
a..combined nithium b.membrane layer c.tail void void lubricant
d .. Mud film layer X .. Stirring zone

Claims (11)

delete delete In the case of propulsion of the propulsion pipe in the ground, a tail void is formed around the propulsion pipe by active excavation by the shear excavator of the excavator by using an excavator having an overcut function and an excavation soil stirring zone. The needle is sprayed toward the excavation surface from the plurality of needle spray holes provided at the tip of the cutter, and the cutter is rotated at high speed, and the dough is sufficiently kneaded in the excavation chamber through a stirring zone having a stirring efficiency by a plurality of inner bits at the cutter end to produce uniformity. An excavated slump of 25 cm, a panel value of 45 sec, and a specific gravity of 1.5 was introduced into the tail void by agitating and mixing the nip and the excavated soil. To reduce the propulsion force of the propulsion pipe by roughening the membrane layer generated by adhering to the soil particles by the penetration effect.
The excavator has a single or multiple rows of vane-pinch valves arranged behind the manifold provided in the partition plate, and the excavator injects the excavated soil and the needle into the excavation chamber through the stirring zone to generate a highly fluidized vane. The generated vane is discharged into the chamber by the vane pinch valve,
The vane discharged into the cabin of the excavator is introduced into the chamber having the upper surface opened, and the chamber suction port for adjusting the suction amount of the vane when the vacuum is transported through the vane pipe to the ground by a vacuum generator provided on the ground. The valve is installed in the valve, the valve is opened and closed by the upper and lower limit sensors, and the vane is intermittently transported to the vane pipe, a plurality of air inlet valves are provided at predetermined positions of the vane pipe, and the long length is maintained in the vane pipe. A two-pronged propulsion and shield jointing method in which the air inlet valve is opened and the air is cut to shorten the vane zone in the pipe by limiting it to a range of 2.0 m in length. In the case of propulsion of the propulsion pipe in the ground, a tail void is formed around the propulsion pipe by active excavation by the shear excavator of the excavator by using an excavator having an overcut function and an excavation soil stirring zone. The needle is sprayed toward the excavation surface from the plurality of needle spray holes provided at the tip of the cutter, and the cutter is rotated at high speed, and the dough is sufficiently kneaded in the excavation chamber through a stirring zone having a stirring efficiency by a plurality of inner bits at the cutter end to produce uniformity. An excavated slump of 25 cm, a panel value of 45 sec, and a specific gravity of 1.5 was introduced into the tail void by agitating and mixing the nip and the excavated soil. To reduce the propulsion force of the propulsion pipe by roughening the membrane layer generated by adhering to the soil particles by the penetration effect.
The excavator has a single or multiple rows of vane-pinch valves arranged behind the manifold provided in the partition plate, and the excavator injects the excavated soil and the needle into the excavation chamber through the stirring zone to generate a highly fluidized vane. The generated vane is discharged into the chamber by the vane pinch valve,
A two-ply propellant and shield join is formed by injecting a combination needle into the tail void using a propulsion tube, and forming a two-layer layer with a two-layer layer of a mud layer and a new mud film layer inside the membrane layer to protect the tail void over a long period of time. Tree construction. The method of claim 3, wherein
The combination nisu is a two-pronged propulsion and shield jointing method using a mixture of 1 to 3 kg of silica sand, 1 to 2 kg of glass fiber, and 1 to 3 kg of pulp fiber, respectively, according to the properties of the soil or the soil. In the case of propulsion of the propulsion pipe in the ground, a tail void is formed around the propulsion pipe by active excavation by the shear excavator of the excavator by using an excavator having an overcut function and an excavation soil stirring zone. The needles are sprayed toward the excavation surface from the plurality of needle spray holes provided at the tip of the cutter, and the cutter is rotated at high speed. An excavated slump of 25 cm, a panel value of 45 sec, and a specific gravity of 1.5 was introduced into the tail void by agitating and mixing the nip and the excavated soil. To reduce the propulsion force of the propulsion pipe by roughening the membrane layer generated by adhering to the soil particles by the penetration effect.
The excavator having the overcut function and the stirring function includes an independent shield cylinder unit having a rear portion of the installation segment mounted in a form protruding out of the device, and a propulsion pipe connected to the shield cylinder unit by a propulsion method. In the underground, when the thrust of the propulsion method has reached its limit, the propulsion method is stopped and then switched to the shield method in a short time, the propulsion jockey in the shield cylinder unit is activated to advance the excavator, and the inner diameter propels the tip of the propulsion pipe. Two-pronged propulsion and shield jointing method for constructing pipelines using segments of the same diameter. The method of claim 6,
The shield cylinder unit includes a release joint for connecting the propelling pipe having a different outer diameter to the installation segment, and when the switch construction is used to construct the pipeline with the segment, the release joint is separated from the shield cylinder unit to separate the propulsion pipe and the installation segment. A two-pronged propulsion and shield jointing method that allows a pipeline to remain in the connecting portion and to be connected to the installation segment by the shielding method. The method of claim 7, wherein
Sealing material is injected into the joint between the release joint, the propulsion pipe fitted to the release joint and the installation segment, and the connection part between the propulsion pipe and the installation segment is exponential even under high water pressure. Two-stage propulsion and shield joint method. delete delete The rear part of the excavator having an overcut function and an excavation soil stirring zone is provided with a part of the installation segment protruding from the outside of the machine to provide an independent shield cylinder unit, and to propel the propulsion pipe connected to the shield cylinder unit. It enters the ground by the construction method, stops the propulsion method when the thrust of the propulsion method is limited, switches to the shield method in a short time, moves the propulsion jockey in the shield barrel unit, advances the excavator, and advances to the tip of the propulsion pipe. The pipeline is constructed using segments of the same diameter as the propulsion tubes,
When switching from the propulsion method to the shield method, half of the injection pipe along the propulsion axial direction outside the skin plate of the shield cylinder unit for post-injection material injection into the outer circumferential surface of the segment after assembling one ring Excavator installed by inserting into the skin plate.

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