KR100857101B1 - Inserting material for water supply and drainage pipe recycling concrete - Google Patents

Abstract

A water supply and drainage pipe filler is provided to obtain excellent plasticity for perfect filling and excellent adhesion for preventing pores by employing pulverized waste concrete. A water supply and drainage pipe filler comprises 10-50.8 parts by weight of pulverized waste concrete and 14.3-23.7 parts by weight of water with respect to 10 parts by weight of cement. The pulverized waste concrete has a particle size of 0.074mm or less, specific gravity of 1-1.2 and absorbance of 5-6wt.%. An inner pipe(20) is equipped inside the outer pipe(10), and the distance between the inner pipe and the outer pipe is at least 400mm. An outer pipe rail support(42) is perpendicular to the driving rail wheel(43) on which the inner pipe is established, and the buoyancy-resistant equipment(41) is equipped in order to prevent the movement of the inner pipe toward the outer pipe on the inner pipe. After completing the equipment of the inner and the outer pipes, the filler is subjected to the space between the inner and the outer pipes.

Description

Insulating material for water supply and drainage pipe recycling concrete

The present invention relates to an injection filler for water and sewage internal and external appearance using fine powder (hereinafter referred to as waste concrete fine powder) prepared using waste concrete recycled aggregate, and more specifically, 10 to 50.8 parts by weight of waste concrete fine powder, based on 10 parts by weight of cement. ; And 14.3 to 23.7 parts by weight of water. In particular, it relates to a water and sewage injection filler excellent in adhesiveness and plasticity with the size of the waste concrete fine powder is 74㎛ or less, the water absorption is 5 ~ 6wt%.

In general, in the case of water supply double pipe construction, when mortar is used between the outer tube and the inner tube, it is difficult to completely fill it due to the lack of viscosity and plasticity of the fine aggregate constituting the mortar. The blending ratio in the case of injection filling and feeding into such mortar is prescribed in the water supply specification to be based on the weight ratio cement (1): water (0.8): fine aggregate (3) (waterworks specification, 1990). However, this specification does not have any special provision except for the 1: 3 compounding ratio of mortar and filling pressure of 0.3 MPa or less when filling.

1 is a perspective view illustrating a process of injecting a filler into a conventional water and sewage internal and external appearance. As shown in FIG. 1, a filler injection tube 30 is inserted between the inner tube 20 and the exterior 10 and a filler is inserted through the filler injection tube 30. In the construction of the water supply double pipe, the outer tube 10 serves to protect and support the inner tube 20. In the case of the filler also serves to support, but the main purpose is to fix the inner tube to prevent shaking.

In the current construction, the weight ratio of cement and fine aggregate is 1: 3, and the construction method using the hydraulic pump 35 is used. In the case of filling with 1: 3 compound mortar, the cohesive force before hardening is low, and when injected at 0.3 MPa, which is a standard injection pressure, since a large pressure loss occurs in the filling tube 30 by long-distance injection, the injection discharge port 31 Ess is the pressure level at which mortar comes out of ready-mixed concrete, not pressure spray. In this conventional propulsion method, after propelling the water supply pipe 50 to 100m, both ends are blocked, and a hole is injected into the upper end of one end, and the filler injection tube 30 is pulled out and injected. Filling in this way to the other side and closing the injection hole completes filling.

However, this pressure fills the mortar to some extent, but the upper part of the filling space is not filled. Because, when filling one side, it is almost filled to the upper surface of the inner and outer surfaces of the tap water (12, 20), but if it is continuously injected, the upper side of the mortar is collapsed and the upper part is not occupied. Filling is complete.

Such empty space is caused by the low adhesive strength of the mortar, and thus, the development of a filler that does not collapse the upper part of the mortar in spite of the long distance feeding is urgently needed.

The present invention has been made to solve such a problem, an object of the present invention to provide an injection filler that satisfies the excellent plasticity and adhesive strength by using concrete fine powder having uniform properties using waste concrete recycled aggregate. .

Water and sewage injection filler using fine powder using waste concrete recycled aggregate as a specific means of the present invention for achieving the above object is 10 to 50.8 parts by weight of waste concrete fine powder; And 14.3 to 23.7 parts by weight of water.

In addition, the waste concrete powder is characterized in that the particle size is 0.074mm or less.

In addition, the waste concrete powder is characterized in that the specific gravity is 1 ~ 1.2.

In addition, the waste concrete powder is characterized in that the absorption rate of 5 ~ 6wt%.

In the case of the injection filler using fine powder using waste concrete recycled aggregates, the pores are not formed when the filler is used as an injection filler for water and sewage internal and external pipes because of excellent adhesiveness compared to the case of using the existing fine aggregate (eg, sand).

In addition, since the adhesiveness as well as the plasticity is excellent, there is an advantage that the complete injection filling is possible without collapsing the upper side of the filling space between the inner tube and the exterior despite the long distance transport.

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

Water and sewage injection filling material using the fine powder using the recycled concrete recycled aggregate of the present invention is using the fine powder using the recycled concrete aggregate, first of all, after looking at the fine powder (hereinafter referred to as concrete fine powder) using the recycled concrete aggregate, Look at the injection filler inventors.

< Waste concrete  Differential>

The waste concrete fine powder is prepared using waste concrete recycled aggregate. First, to perform the operation of grinding the waste concrete recycled aggregate (S10). This primary coarse grinding process is performed by the jaw crusher. As such, the recycled aggregate of 40 mm or less crushed by the jaw crusher is fed into the charity. Charity is a device for removing steel waste by using the properties of the magnet (S20). In these charities, the recycled material from which steel waste is removed is introduced into the impact crusher. The impact crusher is repeatedly milled until it becomes 5 mm or less (S30). And 5mm or more particles (coarse aggregate) are separated from these 5mm or less particles. (S40)

The coarse aggregate separated particles are sent to the sand unit to separate the fine aggregate (sand), fine aggregate (sand) is selected and separated. (S50, S60).

At this time, the washing machine is supplied with the washing water from the water tank. In such a rotary sorter to perform the task of washing with the washing water and also to remove the aggregate of more than a certain size. The reason for performing the washing with the washing water in this way is to separate the suspended solids because the waste concrete powder contains a large amount of suspended solids. (S70)

The method for preparing fine powder using the waste concrete according to the present invention is to use the process of supplying the water purified from the precipitation and concentration tank which will be described later in the supply of the washing water.

Such suspended matter refers to styropol, wood, plastics, etc., and is removed from the float remover. Particles from which the suspended matter is removed are passed through the dehydration screen to obtain a constant particle size while the washing water is sprayed by the spraying device (S75). At this time, the particles that do not pass through the dewatering screen is sorted, and the washing sewage passing through the screen is collected into a tank. In this process, particles of a certain size (sand) contained in the waste concrete are removed. If the particles are included in the injection filler 100 for water and sewage internal and external appearance according to the present invention will be a factor that reduces the adhesiveness is to remove them.

Then, the filthy water is removed from various fiber yarns such as yarn and hair through the fiber yarn removal process. At this time, compressed air is supplied to facilitate the removal of residual fiber yarns attached to the conveyor.

Thus, the washing water and fine powder from which the fine aggregate is removed are precipitated and concentrated by the chemical supplied by the chemical supplying device (S80). The place where this is done is the settling and concentration bath. These sedimentation and concentration baths operate according to the scraphaul resistance value, which depends on the sludge concentration at the bottom.

This means that if the concentration is overloaded, the scrapes are automatically raised and gradually lowered while becoming softer. The sludge pump rotates the scrapes to concentrate to a certain concentration, and the supernatant is sent to the water tank and reused as wash water. In addition, the pump concentration is in optimal condition to play a role to increase the dewatering efficiency of the filter press.

On the other hand, the powdered coagulant precipitant and water are mixed in an appropriate ratio, dissolved in a dissolution tank, and then transported and stored in a aging tank, which is then pumped and supplied to a precipitation concentration tank.

The sediment concentrator has the advantages of simple structure, small size, easy installation, fully automatic operation, easy maintenance due to standardized parts, and low operating cost.

On the other hand, the washing sewage through the dehydration screen goes through the following purification system. Firstly, the effluent is transferred to the sedimentation tank through the steel pipe and stored. In this process, heavy particles are precipitated by their own weight.

In general, impurities contained in the medium are suspended, colloidal, or dissolved depending on the size of the particles. At this time, the suspended solids are easily precipitated by their own weight in the precipitation, but the colloids are charged with electricity, so they are not easily filtered and do not precipitate by Brownian movement.

In this way, a colloidal precipitant is added to the colloidal aggregates by reducing the zeta potential by dropping the opposite charge material of the colloidal particles or by changing the pH in the symbolic water of the precipitation concentration tank containing the colloidal particles.

Sodium hydroxide and aluminum sulfate, which are representative flocculation precipitants, are placed in a precipitation concentrator and the state of overlying supernatant water is observed. Precipitation thickening tank is composed of one settling tank to add a coagulant at a time difference or two or more settling tank can be installed in each of the coagulant tank. In the case of the present invention, the drug storage device serves as a flocculant tank. As such, the sludge-treated particles are sent to a silo and stored (S90).

The stored sludge particles are dehydrated in a cake state, and the dehydrated water is sent to a mixing tank, whereby fine powder in a sludge state compressed by a filter press is obtained (S100). In this case, the particles in the sludge state (waste concrete powder) have a particle size of 0.074 mm or less. At this time, the particles having such a size are in a state of good plasticity and adhesion.

Water and sewage internal and external injection filler 100 using waste concrete fine powder according to the present invention uses the fine powder having a particle size of 74㎛ or less as a substitute material for sand (grain aggregate). In addition, in the case of fine powder obtained by such a water treatment process, since the content of water varies depending on the fine powder, it is necessary to homogenize it. To this end, heating is performed in the small rotary kiln (S110). Through this operation, the water content contained in the waste concrete powder becomes constant, and because the chemical and physical properties are the same, it can be used as the filling filler 100 in the filling part of the internal and external water and sewage.

If this is not done, the waste concrete powder will not show uniform properties, which will depend on what kind of powder is used in plasticity or strength.

In addition, the water and sewage internal and external injection filling material 100 using peconcrete fine powder according to the present invention includes a process of being precipitated and concentrated from a drug supply device, such a drug supply device is composed of a preparation tank and a use tank, Has a configuration that can be used repeatedly washing water.

The fine powder obtained through this water treatment process is suitable for use as a substitute because of its good adhesiveness. In other words, in the case of water and sewage internal and external appearance, it is good to have self-leveling property because compaction cannot be performed.

In the case of injection filler 100 for water and sewage internal and external appearance according to the present invention, the use of relatively expensive cement and fine aggregates requires a long cost of the internal and external tubes 10 and 20 to be filled. In order to solve this problem, in the case of the injection filler 100 for water and sewage internal and external appearance according to the present invention, a method of replacing all fine aggregates with fine powder was used.

Injection filler

The injection filler according to the present invention uses the above-mentioned waste concrete fine powder, and is made of a mixture of waste concrete fine powder, cement and water. In the case of waste concrete powder, there is no standard of specially applied methods and specifications. Therefore, first, a certain criterion for fluidity (flow angle) and strength is examined, and then the flow angle and adhesion of the water and sewage injection filler 100 are characterized. The change in the flow angle and the intensity according to the degree and the formulation will be described through several embodiments. 'Differential' in the following means 'discrete concrete derivative' as described above.

(Standard of fluidity and strength)

Typically, a certain amount of water must be injected into the cement to cure the cement. This is called the hydrolysis ratio, and the curing rate of the cement varies depending on the hydrolysis ratio. In general, when the mixing ratio of water is increased and the mixing ratio of cement is decreased, the curing time is long. This reason can be said to be a phenomenon which occurs because the coagulation effect by cement appears late as a whole.

NO Cement (kg) Differential (kg) Water (kg) FLOW angle (average) 3 minutes 6 minutes 9 minutes 12 minutes One 135.76 135.76 137.5 63 63 - - 2 128.60 128.6 142.5 54 53 53 53 3 114.28 114.28 152.5 35 38 40 42 4 107.12 107.12 157.5 30 34 35 38 5 103.54 103.54 160.0 27 31 32 35 6 99.96 99.96 162.5 24 26 28 31

As can be seen in Table 1, when the weight ratio of cement decreases and the content of water increases, it takes a long time for the injection filler 100 to condense and the fluidity improves. Accordingly, in the case of the formulation of No. 1, the water and sewage internal and external injection filler 100 was already cured at 6 minutes and no longer exhibited fluidity. However, as can be seen from No. 2, reducing the weight ratio of cement and increasing the water content lowers the flow angle and does not cure after 12 minutes.

Figure 5 is a perspective view showing the flow angle test by the combination of cement, waste concrete powder, water according to the present invention. As shown in FIG. 5, the flow angle test measures the angle at which the filling filler 100 starts to tilt on the flow angle tester 60 while placing the protractor 50 thereon while tilting the flow angle tester 60. Use the method.

The result of this flow angle test resulted in a low flow angle value indicates that the above compound has a good flowability, and a high flow angle value indicates that the cement's condensation progresses to a certain degree and thus the fluidity is poor.

First, the criteria for the degree of fluidity required for use in water and sewage internal and external injection filler 100 should be set first.

result Angle of inclination situation Bad Flow out to 0-15 ° Lack of plasticity Good Flowing out at 15-30 ° Plasticity titration Bad Flow out more than 30 ° Plasticity excess

As shown in Table 2, if the condensation property of the injection filler 100 according to the present invention is not exhibited, it flows even with a small tilt, which means that it can be used as the injection filler 100 for water and sewage. Considering the change in flow angle over time according to [Table 1] with the criteria for such fluidity, it can be seen that No 4,5,6 is an appropriate ratio of cement, waste concrete powder, and water.

Of course, if the measurement after 3 minutes on the basis of the initial time means that only No. 5 and No. 6 can be used as the injection filler 100 for water and sewage internal and external appearance according to the present invention. However, in the case of strength, as the content of cement increases, the strength characteristics are improved, and therefore, in the case of No. 4, the strength characteristics are predicted to be excellent, so the applicability to the water and sewage internal and external injection filler 100 according to the present invention is examined. Let's do it.

In the case of the injection filler 100 for the internal and external water supply and drainage, the specific factors that can affect the strength, specific gravity, absorption rate and unit volume weight will be important factors, so it will be discussed first with the measurement results.

That is, the specific gravity and absorption rate of these fine aggregates have a great influence on the adhesiveness, so it is necessary to know the results and examine how to apply them. In some cases, the material of adhesiveness represents an extent of separation of other materials from other materials. In the case of the injection filler 100 according to the present invention, if a certain degree of adhesion is not secured, material separation occurs and these materials are injected fillers of the internal and external water and sewage. Cannot be used.

Considering this, concrete having a large number of units and a large slump is likely to cause material separation. In particular, when the water cement ratio is large and the viscosity of the mortar portion is low, material separation is remarkable. In addition, the adhesion increases due to the compaction during transportation or vibration.

In this regard, in the case of the injection filler 100 for internal and external water supply and drainage according to the present invention, a process called compaction does not enter because the steel pipe propulsion method is used. Of course, the process of mixing before inserting the injection filler 100 according to the present invention between the main tube and the propulsion tube is possible, but it is preferable to avoid this process because the phenomenon of condensation occurs in advance. In addition, since there is no compaction work, it is necessary to have a property of self-leveling to be used as the filling filler 100. In order to achieve this, it is preferable that the specific gravity of the waste concrete powder serving as fine aggregate is similar to that of cement. Moreover, since good water absorption has good adhesiveness, it is necessary to ensure adhesiveness using fine powder.

In the case of water and sewage internal and external filler according to the present invention, it is possible to secure the fluidity of the filler by using the property of absorbing such water when the water absorption becomes a certain degree or more. The criteria for this test are well described in KS F 2504. In the case of water and sewage internal and external fillers according to the present invention, the water absorption is 5-6 wt%. This can be said to be 2 to 3 times higher absorption rate than the case of mortar used as a general injection filler (100).

The reason why the specific gravity is similar to that of cement is good because when the specific gravity of the fine powder is significantly different from the cement, it promotes material separation. Settling is marked in heavy aggregates and tends to settle in normal aggregates. On the other hand, as fine grain content of fine aggregate increases, adhesiveness increases. Increasing fine aggregates as described above is an effective method of securing adhesion as the injection filler 100.

In addition, the uniform particle size distribution has a good effect on the adhesion. In the case of the injection filler 100 according to the present invention, the experiment was performed in anticipation of increasing the content of fine powder having a particle size of 74 μm or less.

First, the filling filler 100 must be expressed to a certain degree or more in order to be used as a foundation of a civil structure. As described above, in the case of a compound composed of cement, mortar or concrete have the greatest influence on the strength content of cement. On the other hand, when the amount of cement used decreases, the initial setting time increases, which increases the fluidity but decreases the strength.

In the case of the injection filler 100 for water and sewage internal and external appearance according to the present invention, when the strength is secured, the fluidity decreases, and thus it is not possible to exert the property of filling voids, which is a property of the internal and external injection filler 100. However, when only the fluidity is important, strength does not develop, and it is not suitable for use as the injection filler 100 for internal and external water and sewage. In the case of the filling filler for water and sewage internal and external appearances according to the present invention, an object of the present invention was to optimize two characteristics of strength and plasticity. In this case, it is preferable to increase the content of cement for strength reinforcement, and that the method of using waste concrete fine powder is effective for securing plasticity, so it will be obvious to those skilled in the art, and thus detailed description thereof will be omitted.

First, before finding a formulation that satisfies the properties of plasticity and strength for the water and sewage internal and external injection filler 100 using the above-mentioned waste concrete, the specific gravity, absorption rate and unit volume weight of the waste concrete can be substituted for mortar. Was measured. First, specific gravity and water absorption were measured by the method specified in KS F 2504.

In the case of specific gravity, three tests showed that the specific gravity was lower than that of cement but higher than that of sand. In the case of the absorption rate, the ratio of cement to mortar is two to three times higher than that of the case of 1: 3, which causes the effect of delaying the hardening of the cement by absorbing a lot of water in the behavior of the actual filler 100. do. Accordingly, it is expected that the strength expression will be slowed down, thereby making it difficult to secure the strength. However, if it has the value of the specific gravity and the absorption rate, it is judged that it will be suitable for application as the water and sewage injection filler 100 in general. These specific gravity and water absorption are usually required to secure the fluidity and strength required as the water and sewage injection filler (100).

In the case of fine powder classified through a sieve and heated to the waste concrete according to the present invention, it can be determined that this value is satisfied. Particularly, in the case of fine particles, it is believed that this will contribute to the improvement of adhesion due to the use of particles of 74 μm or less. This produces the effect of filling the voids of the internal and external water supply and drainage, and increases the adhesion between the inner tube and the exterior.

Unit volume weights are specified in KS F 2505. The unit volume weight was measured accordingly and found to be 1.09 g / cm 3, which is similar to the unit volume weight of water. Therefore, it can be expected that propulsion is possible with low propulsion pressure. It was determined that such unit volume weight could actually affect long-term water and sewage internal and external propulsion.

Hereinafter, the flow angle, the degree of adhesive force, and the change in strength and the change in the flow angle, which are characteristics of the water and sewage injection filler 100, will be described through examples.

( Example  One)

Table showing flow angle and strength measurement results when the ratio of cement to fine powder is 1: 6.5 NO Cement (kg) Differential (kg) Water (kg) W / C (%) Initial flow angle 7 Day Strength (N) 7 days of strength (compressive strength / cubic mold area) 28-day strength (compressive strength / cubic mold area) One 36.96 241.74 136.95 350 85 2633 1.053 MPa 1.504 MPa 2 34.42 225.10 145.74 400 42 1866 0.746 MPa 1.065Mpa 3 34.88 228.09 147.68 450 12 - - -

In the case of the flow angle, as the amount of cement decreases, it becomes smaller, and the amount of water decreases. In case of strength, it can be seen that the compressive strength is 1.5 times the viscous soil bearing capacity at the upper limit of soil soil reaction force.

( Example  2)

Table showing flow angle and strength measurement results when the ratio of cement to fine powder is 1: 5 NO Cement (kg) Differential (kg) Water (kg) W / C (%) Initial flow angle 7 Day Strength (N) 7-day strength (MPa) Age 28 Days Strength (MPa) One 48.94 248.91 89.91 250 70 2710 1.085 MPa 1.550 MPa 2 44.57 226.73 98.28 300 35 3727 1.491 MPa 2.130 MPa 3 43.79 222.76 99.78 310 43 4287 1.715 MPa 2.450 MPa 4 40.92 208.71 105.28 350 11 - - -

The flow angle in the case where the weight ratio of cement to fine powder is 1: 5 depends on the formulation of the material. In this case, as the water content generally increases, the initial flow angle, that is, the flow angle three minutes after being fed from the mortar mixer, decreases as the proportion of water increases. This indicates that the fluidity improves as the water increases.

On the other hand, in the case of strength, in the case of the formulation of No. 4, the hardening of the cement did not occur, so the strength was not measured for 7 days. There are many reasons for this, but the cement content is so small that the condensation did not occur due to the hardening of time. However, in the case of No. 1, although the amount of cement is large, the strength of 7 days and 28 days is less than that of the case of No. 3 in which the amount of cement is small. It was confirmed that this shows about 3 MPa when compared with the cohesive soil bearing capacity at the upper limit of soil ground reaction force, which is a property value required by the present invention. Accordingly, when the weight ratio of cement to fine powder is 1: 5, it may be used as a suitable water and sewage internal and external injection filler 100.

( Example  3)

Table showing flow angle and strength measurement results when the ratio of cement to fine powder is 1: 3.6 NO Cement (kg) Differential (kg) Water (kg) W / C (%) Initial flow angle 7 Day Strength (N) 7-day strength (MPa) Age 28 Days Strength (MPa) One 50.84 183.35 160.26 300 - - - - 2 56.13 203.93 148.54 250 7 2633 1.053 MPa 1.504 MPa 3 59.68 216.83 141.2 225 43 5667 2.306MPa 3.294 MPa 4 63.23 229.72 133.86 200 85 7467 2.948 MPa 4.266 MPa

When the specific gravity of cement: fine powder was 1: 3.6, the flow angle was too good in the case of No. 1, and the flow angle in the flow protractor was impossible because the cement did not condense. But as the amount of cement increased and the water content decreased, the flow angle increased. In the case of compressive strength, injection fillers of No. 3 and No. 4 became strength expressions that can be used as injection fillers for water and sewage. However, when the flow angle is No. 4, 85 degrees is obtained, so the formulation of No. 3 is more suitable for the injection filler 100 for water and sewage internal and external appearance.

( Example  4)

Table showing flow angle and strength measurement results when the ratio of cement to fine powder is 1: 2.18 NO Cement (kg) Differential (kg) Water (kg) W / C (%) Initial flow angle 7 Day Strength (N) 7-day strength (MPa) Age 28 Days Strength (MPa) One 92.45 201.5 146.8 150 10 1168 4.664 MPa 6.662 MPa 2 96.00 209.3 142.3 140 25 1473 5.896 MPa 8.422 MPa 3 97.88 213.4 139.9 135 43 1572 6.284 MPa 8.977MPa 4 99.83 217.6 137.3 130 70 1606 6,424 MPa 9.177 MPa

When the weight ratio of cement was increased to about 1: 2.18, the high strength value of 7MPa or more was obtained at 28 days of compressive strength. Considering the proper value of the flow angle according to [Table 2], the formulation of No. 2 is the most suitable formulation as the injection filler 100 between the upper and lower sewage inside and outside the most suitable. In addition, if the weight ratio of the cement is increased so that the ratio of cement to fine powder is 1: 2.18 during the mixing according to the present invention, the strength increases with decreasing water, and the initial flow angle increases with decreasing water content. there was. As can be seen in the present invention, increasing the flow angle means that the fluidity and plasticity are lowered, and decreasing the flow angle means that the fluidity and plasticity is increased. From this, in the case of the injection filler 100 including waste concrete fine powder, even if the ratio of cement: fine powder is changed, an appropriate flow angle can be secured by changing the moisture content. In addition, when the weight ratio of cement was increased, the compressive strength was much higher than 7 MPa, that is, greater than the support capacity of gravel at the upper limit of soil soil force.

Water and sewage injection filler according to the present invention is advantageous in terms of construction cost compared to the conventional mortar. As an example, when the weight ratio of cement to fine powder is 1: 5 and the flow angle is 43 degrees (N0.3), the economical efficiency of the conventional cement and the fine aggregate is mixed at a weight ratio of 1: 3. When filling the length 100m into the internal and external waterworks having an outer diameter of 280cm and an inner diameter of 220cm, it costs 16,520,000 won. However, when the mortar according to the present invention is compared with the unit cost margin, it was possible to save about 12,000,000 won in 100m construction. That is, the injection filler of the present invention can be equipped with economics as well as plasticity.

<Injection for external and external sewage Filling  Method>

Figure 3 is a construction flow chart for filling and filling the internal and external water and sewage using the injection filler according to the present invention. As shown in FIG. 3, first, assembling and mounting the machine rail installation and the hydraulic equipment as the main road plan gradient after curing the floor in the filling work zone and the reaction wall concrete curing (S210). Then perform tip shoe reinforcement on the first pipe. At this time, the grasp of the central location should be made (S220). Then, the pipe is mounted on the machine rail with the tip shoe reinforcement, and the level is checked again (S230). The level is confirmed to propel the pipe to the hydraulic equipment of 700 tons (S240). The push rod is inserted between the steel pipe and the hydraulic jack to continue the operation (S250). At this time, the earth and sand sucked into the pipe by the method of preliminary excavation is continuously discharged out (S260). After that, the steel pipe welding operation is performed (S70). The propulsion with such hydraulic equipment (S240), the push between the hydraulic equipment and the steel pipe to push the push (S250), pre-propelled after the excavation method to discharge the pipe soil (S260), steel pipe welding (S270) Repeatedly perform (S280). Then through the completion of the steel pipe as a propulsion pipe to reach the reach (S290). When the work on the propulsion pipe is completed in this way, the inner pipe 20 is placed in the exterior 10 to perform the operation (S300).

The propulsion reaction supporting wall is a concrete or reinforced concrete temporary structure that is formed for the press-fitted construction of the exterior (steel pipe) in areas where it is impossible to be attached or difficult while performing various pipeline constructions. These propulsion reaction support walls are installed by placing concrete with no reinforced concrete. In case of soft ground, lower aquifer ground or propulsion pipe diameter, large propulsion and long distance propulsion, reinforcement reaction walls are formed.

Propulsion reaction force supporting wall is installed to calculate the required propulsion force according to the ground condition and propulsion distance so that it can withstand the stress at least equal to or greater than the required propulsion force. It is preferable to secure a depth of at least 30 cm to the lower portion of the temporary wall in which the propulsion reaction support wall is installed at the depth of the forward trench. At this time, the depth of the propulsion reaction supporting wall foundation footing is determined by calculating according to the diameter of the exterior 10, the driving distance and the ground conditions.

The diameter of the outer appearance 10 is preferably such that the minimum inner diameter is 300mm or more based on the maximum outer diameter of the main joint. This is because the interior pipe 20 is installed after the exterior propulsion construction and the space between the interior 10 and the exterior of the main building 20 needs to be filled with mortar.

In addition, when the propulsion distance belongs to a relatively long distance, it should be selected so that the space between the inside and outside of the exterior 10 can be formed at least 40 cm in diameter. In general, the mortar filling is installed by using an air vent pipe on the upper side of the propulsion pipe 30 and the forward and the reaching steel pipe 10 for the mortar injection and using a portable pump or the like. If the driving distance is long, it is safer to use a mortar grout pump rather than a portable pump car.

The thickness of the exterior 10 is determined by examining the required propulsion force, the bending stress and the compressive stress of the exterior, and examining the earth pressure of the propelling tip and the peripheral friction earth pressure and side stress of the exterior side.

4 is a use state diagram showing a state of laying the inner tube 20. The space between the exterior 10 and the inner tube may be 400 mm or more as described above, and the inner tube 20 is provided therein. To this end, the exterior rail support 42 is installed, and the propulsion rail wheels 43 are installed to be perpendicular thereto. The inner tube 20 is laid here, the buoyancy guard 41 is installed on the inner tube 20 to prevent the inner tube 20 from being pushed toward the outer side 10 by buoyancy.

When the exterior 20 is laid in the planned gradient, the finishing plate is welded and sealed with an iron plate. Install mortar injection pipe and air vent at both ends of propulsion pipe. When grouting is injected into the mortar inlet at an injection pressure of 1 to 5 kgf / cm 2, the laying of the water and sewage pipe having the inner tube 20 and the outer tube 10 is completed.

As such, when the propulsion work for the inner tube 20 and the exterior 10 is completed, the injection filler 100 is injected between the inner tube 20 and the outer shell 10, wherein the predetermined portion as described above. Only the filling is filled and other parts are not filled will occur.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will include modifications and variations as long as they fall within the spirit of the invention.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.

1 is a perspective view showing a filling process inside and outside the water supply and drainage according to the conventional invention.

Figure 2 is a procedure showing a water treatment process for obtaining the waste concrete fine powder from the waste concrete recycled aggregate according to the present invention.

Figure 3 is a procedure showing a steel pipe propulsion construction method according to the present invention.

Figure 4 is a cross-sectional view showing the laying state of the inner tube according to the present invention.

Figure 5 is a perspective view showing the flow angle test by the combination of cement, waste concrete powder, water according to the present invention.

<Description of Signs of Major Parts of Drawings>

10: appearance,

20: Inner tube,

30: Promotion tube,

35: hydraulic pump,

41: buoyancy support,

42: Rail,

43: Propulsion rail wheels,

60: Flow angle tester.

100: injection filler.

Claims (4)

Per 10 parts by weight of cement, 10 to 50.8 parts by weight of waste concrete fine powder; And 14.3 to 23.7 parts by weight of water, and the particle size of the waste concrete fine powder is 0.074 mm or less, specific gravity 1 to 1.2, and water absorption is 5 ~ 6wt% water and sewage injection filler using the fine powder. . delete delete delete

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