KR100809001B1 - Earth reinforcement method based on the control for settlement of the concrete pavement comprising reinforced concrete slab - Google Patents

Abstract

A ground reinforcement method for controlling the settlement of a concrete paved road having a reinforced concrete slab is provided to reduce the lowering of ride comfort or the risk of an accident by controlling the relative differential settlement around an uneven roadbed and reinforcing the surrounding ground with grouting materials, thereby preventing the excessive differential settlement, crack and fracture of a pavement concrete layer and a lean concrete layer on an uneven roadbed. A ground reinforcement method for controlling the settlement of a concrete paved road having a reinforced concrete slab comprises the steps of laying horizontal and vertical grouting material injection pipes(100) in the lower part of a reinforced concrete slab(90) supporting a pavement concrete layer and a lean concrete layer of a bank whose ground bearing capacity having low ground bearing capacity, and injecting grouting materials through the grouting material injection pipes if the relative settlement of the bank having low ground bearing capacity against a cut slope having high ground bearing capacity exceeds the normal value.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete slab,

Figures 1a and 1b are cross-sectional views of a concrete pavement according to the prior art;

FIG. 2A is a pattern diagram showing settlement occurrence on a concrete pavement of a concrete pavement. FIG.

Fig. 2b is a cross-sectional view of a concrete pavement of a folding step with a reinforced concrete reinforcing slab.

FIG. 2C is a sectional view showing a state in which a reinforced concrete reinforcing slab is installed on a folding-type scaffold according to the first embodiment of the present invention, and a grouting material injection pipe is disposed on a lower portion of the reinforced concrete reinforcing slab.

Fig. 2d and Fig. 2e are plan views showing a state in which a grouting re-injection tube is arranged. Fig.

FIGS. 2f to 2h are plan views showing an installation form of a reinforced concrete reinforcing slab installed when the cut facet is inclined. FIG.

FIG. 2I is a plan view showing a form in which a grouting reinforcement pipe of a reinforcing material is sloped below a reinforcing concrete reinforcing slab installed when a cut-off interface is inclined. FIG.

FIG. 3A is a cross-sectional view of a concrete pavement of a folding step with a ground reinforcement according to a first embodiment of the present invention, taken along line A-A of FIG. 2I.

FIG. 3B is a longitudinal sectional view of a concrete pavement of a folding step of a folding step with a ground reinforcement according to the first embodiment of the present invention, taken along line B-B of FIG. 2I.

Figure 3c is a detailed view of the longitudinal grouting injection tube shown in Figure 3b.

Figure 3d is a detailed view of the lateral grouting injection tube shown in Figure 3a.

Figure 3e also shows the operating state of the grouting injection tube.

FIG. 4A is a vertical cross-sectional view of a concrete pavement in a box or underground ramen section in which a ground reinforcement is implemented according to a second embodiment of the present invention, in which the horizontal grouting injection pipe is arranged. FIG.

FIG. 4B is a plan view showing a state in which a grouting injection pipe is arranged on a concrete pavement in a box or underground ramen section in which a ground reinforcement is implemented according to a second embodiment of the present invention. FIG.

4C is a sectional view taken along line A-A in Fig. 4B. Fig.

FIG. 4D is a sectional view taken along line B-B of FIG. 4B. FIG.

FIG. 5A is a plan view showing a state in which a grouting pipe is installed on a concrete pavement of a bridge having a ground reinforcement according to a second embodiment of the present invention and a connection portion between the bridge portion. FIG.

5B is a sectional view taken along the line A-A in Fig.

5C is a sectional view taken along the line B-B in Fig. 5B. Fig.

5D is a sectional view taken along the line C-C in Fig. 5B.

DESCRIPTION OF THE REFERENCE SYMBOLS

10: Cutting section 20:

30: Bible interface 40: Supporting layer

50: lean concrete layer 60: pavement concrete layer

90: reinforced concrete reinforcing slab 100: grouting reinforcement pipe

100h: transverse grouting re-injection tube 100v: longitudinal grouting re-injection tube

200: box structure 300: bridge

320: Bridge connection slab

The present invention relates to a method of manufacturing a concrete pavement comprising a pavement concrete layer and a lean concrete layer in a nonuniform roadbed causing a problem of unequal settlement, such as a stepped boundary between a cut- A ground reinforcement method based on settlement control of a concrete pavement with a reinforced concrete reinforcing slab for constructing a continuous control method of settlement amount in case of installing a reinforcing slab to prevent breakage and thus presenting an appropriate standard of the reinforcing slab will be.

Generally, in the case of constructing highways and roads in sloped terrain, the ground at a point higher than the reference level at which the road is installed is cut, and the ground at a point lower than the reference level is set to a horizontal level so that the ground level of the cut- , The consolidation has already been carried out for a long period of time, and sufficient support force can be exerted, so that the settlement does not occur even after road construction and public use. On the contrary, in the case of the underfloor ground, The difference of the bearing capacity is large according to the state, the compaction degree and the compaction period, and the degree of the settlement is relatively large as compared with the cut part.

In the case of a road in which a packing concrete layer 6 is provided on an auxiliary concrete layer 4 formed on a ground and a lean concrete layer 5 thereon as shown in FIG. 1A, The uneven settlement occurs at the interface between the portion 1 and the embankment 2, that is, between the two grounds around the folding boundary 3, The concrete pavement layer 6 may be damaged due to the load of the vehicle or the like passing through the road to cause the occurrence of cracks and also the durability of the ground and concrete pavement layer may be lowered due to intrusion of the cracks, When a step due to cracks occurs, a shock is applied to a vehicle running on the road, thereby reducing the riding comfort of the passenger and further posing a safety hazard.

In order to avoid the problem of uneven settlement, it is necessary to pay special attention to the selection of good embankment materials when forming the embankment, to perform sufficient compaction work, to set the concrete pavement layer after stabilization of the ground in the embankment is completed, Is started. However, even if the construction management is performed in this way, it is impossible to completely eliminate the problem of the unequal settlement considering that the support force of the slope portion and the cover portion can not be substantially maintained. For example, As disclosed in Japanese Patent Application Laid-Open No. 2000-0012376 (published on Mar. 06, 2000), a reinforcement method of installing a reinforced concrete slab at the intersection of a folding and curved surface is proposed.

However, according to the conventional technique disclosed in the above publication, the length of the reinforced concrete reinforcing slab disposed in the cut-off step is 6 m, and the length of the reinforcing concrete slab in the direction of the embankment is limited to 12 m And a reinforcing concrete slab having a total length of 18 m has been proposed. According to the design standard of the reinforced concrete slab of Korea Highway Corporation, which reflects some modifications of such a method, The length of the reinforced concrete slab is 5m and the length of the reinforced concrete reinforcing slab is limited to 15m and the total length of the reinforced concrete reinforcing slab is 20m. I do not have any standards at all, The length of reinforced concrete reinforcing slab is not enough to meet the required value when the settlement height is high and the settlement is large and the effect distance is large. On the contrary, if the settlement height is not high, But rather the excessive reinforcement, which led to the problem of design rationality.

In addition, the extension length of the reinforced concrete reinforced slab at the cut - off site was determined to be 5 m (or 6 m) without any technical reason, resulting in excessive reinforcement, which resulted in excessive use of reinforced concrete and concrete.

Even if a reinforcing material such as a reinforced concrete slab is introduced into a region where the ground supporting force is uneven, such as a folding step of a concrete pavement, a porosity is generated at the bottom of the reinforcing slab installed at the boundary of the non- There is a problem that such a gap acts as another risk factor to the durability and safety of the reinforcing slab itself.

In the past, the problems of the uneven settlement of the concrete pavement centered on the Biblical steps and the limitations of the prior art for solving the problems have been mentioned. However, when a box or a ground raymen structure is crossed under the concrete pavement, And bridges have the same problems that cracks or excessive settlement can occur in the pavement concrete layer and the lean concrete layer constituting the concrete pavement due to the uneven settlement occurring at the uneven point indicating the deviation of the ground supporting force Also, it can be said that the solution has the same technical limit.

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to solve the above problems and to provide a method and apparatus for estimating the settlement amount of a road when applying a concrete pavement, It is possible to provide a means for reinforcing it so as to reduce the possibility of excessive settlement, cracking, destruction of the concrete pavement, .

The present invention is also applicable to a reinforced concrete reinforced concrete slab which is installed around a boundary portion indicating a nonuniformity of the ground supporting force such as a cut-to-length portion of a road to which a concrete pavement is applied, Even if the settlement occurs, it is possible to more firmly support the bottom surface of the reinforced concrete reinforcing slab, thereby preventing the separation of the reinforcing concrete reinforcing slab and the lower ground, thereby preventing damage to the reinforcing concrete reinforcing slab and damage to the lower ground. And to provide a means for ensuring that the user is in a safe place.

In particular, according to the present invention, a grouting reinforcement pipe is embedded in the lower part of a reinforced concrete reinforcing slab supporting a pavement concrete layer and a lean concrete layer in a region where the ground supporting force is relatively weak, based on a boundary showing the non- The grouting amount is measured according to the progress of the settlement of the grouting, and when the settling amount exceeds the specified value, the grouting can be re-injected at a later time.

In addition, the present invention proposes a design standard that minimizes the extension length of the cut-out portion when installing a reinforced concrete reinforcing slab in a folded-step portion of a road where concrete pavement is applied, and also provides a reinforcing concrete reinforcing slab To ensure the stability and rationality of the design.

The present invention relates to a ground reinforcement method applied around a boundary showing a nonuniformity of a ground supporting force on a road to which a concrete pavement is applied, in which a ground supporting force is relatively strong and a relatively weak area is included based on a boundary showing unevenness of the ground supporting force A relative reinforcing slab extending along the inside or the lower portion of the concrete pavement is provided over the area where the relative strength of the ground is relatively high and the relative settlement of the region where the ground supporting force is relatively weak is measured, The grouting material injection pipe is pre-installed in the lower portion of the reinforcing concrete reinforcing slab in order to support the reinforcing concrete reinforcing slab by injecting a grouting material in the lower portion of the reinforcing concrete reinforcing slab, Steps to provide a controlled subsidence of the ground-based reinforcing method of a concrete pavement comprising a reinforced concrete slab, characterized in that the reinforcement made, which comprises a.

According to the present invention, the grouting reinforcement pipe is installed as a transverse grouting material injection pipe by using a fixing means so as to be suspended on the reinforcing bars of the reinforcing concrete reinforcing slab. Further comprising a longitudinal grouting material injection pipe extending to a lower portion of the reinforcing concrete reinforcing slab or an in-phase preventing layer at regular intervals along a central portion between an upper line and a lower line of the concrete pavement, The present invention provides a ground reinforcement method based on settlement control of a concrete pavement.

As described above, the present invention relates to a case where a concrete pavement is applied to various roads such as a highway, and in the case of a road to which concrete pavement is applied, a weak portion of the pavement section, , The BOX inside the embankment section or the underground ramen passage section, and the bridge and the bridge section.

As an example, the basic method for forming the embankment section in relation to the reinforcement of the Biblical step is to first take the necessary amount of suitable soil in accordance with the embankment of the embankment section and then to perform the artificial compaction, ) To allow the first settling to occur, and then concrete pavement is installed over the entire area including the section of the cutter. According to the following equation (1) proposed by NAVFAC DM 7.1 ('82 .5), the secondary compression settlement progresses to such an extent that the settlement amount (h) .

h =? x H

Where H is the sea level (relative to the sea level at 20 m transversely spaced from the Biblical interface), and

α is a settlement factor of 0.15% for 3-year short-term settlement calculations and 0.45% for 15-year to 20-year long-term settlement calculations.

Clay soil (m) 2 4 6 8 10 12 14 16 18 20 22 24 25  Settlement 3 years (cm)  0.2  0.6  0.9  1.2  1.5  1.8  2.1  2.4  2.7  3.0  3.3  3.6  3.8  Settlement 15-20 years (cm)  0.9  1.8  2.7  3.6  4.5  5.4  6.3  7.2  8.1  9.0  9.9  10.8  11.9

Considering such a phenomenon, the present invention provides a method of continuously extending the length of the reinforced concrete reinforcing slab installed in the clayey part according to the embankment of the embankment so as to satisfy the following formula ,

L = h / tan?

Where θ is the permissible sinking angle and tan θ = (3.6 / 600) = 0.006, which is calculated by taking into account the allowable sinking amount of 3.6 cm when the sinking length is extended by 6 m. . (See FIG. 2B)

The length of the embankment of the reinforced concrete reinforcing slab according to Equation (2) is calculated according to the embankment height.

Clay soil (m) 5 6 8 10 12 14 16 18 20 21 22 23 24 25 Length of fillet of reinforcing material (m)  3.75  4.5  6.00  7. 50  9.00  10.50  12. 00  13. 50  15. 00  15.75  16. 50  17. 25  18. 00  18.75

On the other hand, in the case of the cut-off portion, the range of influence of the deformation characteristic and the stress characteristic at the concentrated load is constant at 4 to 5 m irrespective of the height of the embankment, and the limitation of the length of the reinforced concrete- 2A, the quantitative size of the displacement amounts 'S1' and 'S2' on both sides of the boundary 30 where the reinforced concrete reinforcing slab 90 is installed in the cut slab 10 is analyzed The size of the displacement amount (indicated by reference symbol 'S1') of the cut-out portion 10 is only about 3 mm from the analysis result and it is compared with 3.6 cm which is the allowable settlement amount. The length L2 of the reinforced concrete reinforcing slab 90 installed on the cut-out portion 10 is set to 1 (1) by grasping that the installation length corresponds to an excess design and rather an effect is caused by the own weight of the reinforcing slab m to 3 m, and in particular, a length of 2 m, for example, to specify a more preferable installation range from the viewpoint of economy. When the length L2 of the reinforcing concrete reinforcing slab 90 installed in the cut-off portion 10 is set to 1 m or more, the reinforcing concrete reinforcing slab 90 has a length L2 of not more than a straight line, To provide stability that the end portion can be seated on the cut-out portion, and furthermore, considering that the limit is limited to 3 m or less, there is a problem of over designing in the range exceeding this limit.

According to another aspect of the present invention, there is provided a method for reinforcing a ground around a cut-off step, which indicates unevenness of the ground supporting force on a road to which concrete pavement is applied, The length of the reinforcing concrete reinforcing slab installed in the cut-off portion is limited to a length selected from the range of 1 m to 3 m, preferably 2 m, and the reinforcing concrete reinforcing slab installed in the reinforcing concrete reinforcing slab, The installation length of the concrete reinforced slab is extended by a length set in proportion to the long-term settlement estimated according to the embankment of the embankment, and the relative settlement of the region where the supporting capacity of the ground is relatively weak is measured If the relative settlement exceeds the specified value And a step of embedding a grouting material injection pipe in a lower portion of the reinforced concrete reinforcing slab in order to support the reinforcing concrete reinforcing slab by injecting a grouting material into a lower portion of the reinforcing concrete reinforcing slab, The present invention provides a ground reinforcement method based on settlement control of a concrete pavement provided with a reinforced concrete reinforcing slab.

Hereinafter, various preferred embodiments of the present invention will be described with reference to FIGS. 2A through 5D.

Referring to FIG. 2A, the length of the reinforced concrete reinforcing slab 90 of the cut part 10 in relation to the folding part 10 is firstly referred to as the location of the reinforcing concrete reinforcing slab 90 in the section of the cut part 10 The settlement amount of the reinforced concrete reinforcing slab 90 is compared with the settlement amount of the place where the reinforcement concrete reinforcing slab 90 is located, The difference is not large but the difference between the stiffness of the reinforced concrete reinforcing slab 90 and the non-reinforced slab portion 10 due to the difference in stiffness between the reinforcing concrete reinforcing slab 90 and the non- It is connected by a gentle slope section, so that the settlement amount of the cut-out portion itself does not lead to a big problem. Therefore, even if the length L2 of the reinforcing concrete reinforcing slab 90 in the section of the cut-off portion 10 is reduced to 1 to 3 m, and more preferably to about 2 m, the safety after the design and construction can be sufficiently secured . The new principle of the present invention is a principle that allows the difference in settlement amount of the cut soil portion so that the cut soil portion settlement length (L2 + L3) including the cut soil portion extended settlement length L3) is longer than the cut soil portion reinforcing slab length Even if it does not, there is no problem in terms of function, but it is possible to secure a considerable level of economics in terms of cost.

In order to facilitate understanding of the embodiments shown in the accompanying drawings of FIGS. 2C to 5D, one example of application of the present invention is to include a pavement concrete layer and a lean concrete layer below the pavement concrete layer In the present invention, the boundary between the cut-out portion and the embankment portion, which is the most representative of the boundary portions showing the non-uniformity of the ground supporting force in the road on which the concrete pavement is formed, Examples of reinforcement in the reinforced concrete section including the embankment boundary are shown in Figs. 2C-i and 3A-E, and these embodiments are explained as the first embodiment, and concrete in the box- Embodiments related to ground reinforcement of a pavement are shown in Figs. 4A to 4D, and these embodiments will be described as a second embodiment And, Fig. 5a and ~ d shows a third embodiment of the connecting bridges, earth moving. The detailed configurations of the reinforcing concrete reinforcing slabs and the grouting re-injection pipes shown in FIGS. 2d to 3e can be applied in common to the second and third embodiments. However, And descriptions and explanations thereof will be omitted in order to avoid repetition of the description.

The numerical values relating to the size and length of each member are shown in the accompanying drawings of embodiments of the present invention, but these numerical values are merely for reference in order to assist those skilled in the art in understanding the application of the embodiments of the present invention to design or construction It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their scope as defined in the following claims and their equivalents. It is to be understood that all changes or modifications derived from equivalents should be construed as being included within the scope of the present invention.

According to a first embodiment of the present invention shown in Figs. 2C to 3E, in a ground reinforcement method applied around a boundary showing irregularity of a ground supporting force on a road to which concrete pavement is applied, 3B, the pavement concrete layer 60 and the lean concrete layer 50 of the embankment 20, which are regions where the ground supporting force is relatively weak on the basis of the cut facet 30 indicating the nonuniformity of the ground supporting force, The reinforcing concrete reinforcing slab 90 supporting the reinforcing concrete reinforcing slab 90 is buried in advance with the grouting material injection pipes 100h and 100v and then the ground supporting force is relatively increased with respect to the cut- When the relative settlement amount of the fillet 20 which is a weak region exceeds a predetermined value, the grouting material is injected through the grouting material injection pipes 100h and 100v to reinforce the surrounding ground The present invention provides a ground reinforcement method based on settlement control of a concrete pavement with a reinforced concrete slab, wherein a lateral grouting material injection pipe (100h) installed in the grouting reinjecting pipes (100h, 100v) Are arranged in a lateral direction at regular intervals (for example, an interval of 1500 mm as shown) along the road surface, as shown in Figs. 2d and 2e. As shown in the plan view of Fig. 2d, It is preferable to alternately arrange the long grouting material injection pipe and the short grouting material injection pipe, which are 1/2 and 1/4 of the distance (B) from the upstream line (or downline) line to the center line of the roadbed road, respectively. As shown in FIG. 2d, the long grouting re-injection pipe and the short grouting material injection pipe of the upstream line and the downline can be staggered La may be arranged to see sanghaengseon and elongate grouting material injection tube and a Monotype grouting material injection tube of the hahaengseon face each other as shown in Figure 2e.

On the other hand, the rear end portion of the grouting material injection hole 100h through which the grouting material is injected is covered with the protective cap 101b (detailed "B" is shown in FIG. 3D) And the grouting equipment is connected to allow the grouting material to be injected.

Then, as shown in FIG. 3B, the center separating structure 80, the median separating base concrete 80, and the median separating base concrete 80 are separated at regular intervals (for example, an interval of 1500 mm as shown in FIGS. 2d and 2e) along the bed- The first and second frostbreak prevention layers 45a and 45b penetrate through the first and second frostbreak prevention layers 70 and 45b and the lean concrete layer 50 and the first frostbreak prevention layer 45a, The longitudinal grouting material injection tube 100v disposed in the longitudinal direction so as to extend in the longitudinal direction also covers the protective cap 101a (detail "A" is shown in FIG. 3C) The protection cap 101b is removed and the grouting equipment is connected to allow the grouting material to be injected. In addition, it may be provided so as to protrude from the space between the median separating structures 80. In addition, when there is no median separating structure, it is preferable to install the medial separating structure 80 in the center line region of the road so as not to excessively protrude in consideration of stability.

On the other hand, the pipe diameter (exemplified by 50 mm) of the longitudinal grouting material injection tube 100v shown in Fig. 3C is set to be larger than the pipe diameter (exemplified by 12.5 mm) of the lateral grouting material injection pipe 100h shown in Fig. 3D It is preferable to have a diameter of 40 mm to 60 mm (about 50 mm), and it is also possible to measure the settlement amount through a simple instrument or the like, and it is also possible to measure the settlement amount through the above-mentioned lateral grouting material injection tube 100h When the grouting material is injected, the longitudinal grouting material injection tube 100v provided at the corresponding position can act as an air vent to smoothly inject the grouting material.

Here, the detailed structure of the front end portion (detailed "C" portion) of the lateral grouting material injection tube 100h embedded in the lateral direction in the ground will be described. As shown in FIG. 3D, A plurality of discharge holes 102 are formed in the circumferential grouting material injection tube 100h at regular intervals to prevent foreign substances such as concrete constituent materials at the time from being introduced into the pipe, (A one-way valve structure) of a Manjet tube type which is formed in the direction of the circumferential grouting material injection tube 100h and which allows the discharge hole 102 to be surrounded by the rubber sleeve 103, When the pressure of the grouting material filled in the grouting material exceeds a predetermined value, the rubber sleeve 103 is inflated so that the discharge hole 102 is opened so that the grouting material can be injected, When the inner pressure is lower than a predetermined value due to the completion of the injection, the rubber sleeve 103 is contracted to close the discharge hole 102 to prevent the grouting material injected into the ground from flowing back into the pipe. In the case of the horizontal grouting material injection tube 100h having the front end portion, even after the injection of the primary grouting material is completed, the grouting material can be re-injected even when the grouting material is further injected due to an increase in the settlement amount with time. Although not shown in the drawings, instead of adopting the above-described Manjet tube type valve structure, a plurality of discharge holes are drilled in the circumferential surface of the transverse grouting material injection tube 100h as a simple structure It is of course possible to adopt a method of covering the tip end of the lateral grouting reinjection tube 100h with a vinyl cover or the like. According to the preferred embodiment of the present invention, even when the settlement of the ground of the embankment 20 under the transverse grouting material injection pipe 100h occurs, the embankment of the embankment material in which the transverse grouting material injection pipe 100h sinks A lateral grouting material injection pipe 100h is provided on the reinforcing concrete reinforcing slab 90 of the reinforcing concrete reinforcing slab 90 so as to maintain the position fixed to the reinforcing concrete reinforcing slab 90 side of the upper part without descending along the ground. It is more preferable to use a fixing means (for example, a wire 105) or the like so as to be fixed on the stator 92 in a suspended manner.

Herein, the lateral grouting material injection tube 100h has been described by way of example in describing the embodiment employing the Manjet tube type valve structure, but it is also applicable to the longitudinal grouting material injection tube 100v. Do.

According to the above-described embodiment, the relative settlement amount of the embankment 20, which is a region where the ground supporting force is relatively weak for the grounded portion 10, is relatively high (for example, 15 mm, 30 mm or 50 mm) The reinforcing concrete reinforcing slab 90 is embedded in the lower portion of the reinforcing concrete reinforcing slab 90 before the reinforcing concrete reinforcing slab 90 is installed to fill the voids formed between the reinforcing concrete reinforcing slab 90 and the upper portion of the embankment 20, The grouting material is injected through the grouting material injection pipe 100 to reinforce the surrounding ground so as to provide reinforced support to the concrete pavement. Various materials can be used as the grouting material to be used at this time. However, It is preferable to use water + cement and to maximize the bleeding, the maximum amount of water / cement ratio (w / c) 0.45 to 0.5 When uses a large, and required for it is more preferred to use a mixture of a suitable amount of swelling agent in the cement milk. The injection pressure of the cement milk is preferably a low pressure grouting method in order to prevent a heaving phenomenon of the upper structure, and as described above, the vertical grouting material injection Some of the plurality of transverse grouting material injection pipes 100h provided in the pipe 100v or in the lateral direction (horizontal direction) may be used for an air vent to allow air in the injection space to escape.

Further, in various further modified embodiments of the present invention, when the strike of the cut surface portion 30 of the cut surface portion 10 and the cut surface portion 30 is curved or oblique as shown in FIG. 2F road subgrade width point (a, b) for connecting the straight line connecting line (average primary hyangseon) reinforced concrete reinforcement according to the magnitude of the road heading direction and an angle (θ) (D ₀₎ which is parallel to and intersecting to form a It is preferable to divide the shape of the slab 90 into a rectangle (see FIG. 2G) and a parallelogram (see FIG. 2H). When the angle θ exceeds 75 °, A concrete reinforcing slab 90 is applied to the reinforcing concrete reinforcing slab 90. More specifically, the concrete reinforcing slab 90 is applied to both the connection line (average main line) connecting the points a and b and the width D ₁ of the reinforcing concrete reinforcing slab 90 At the intersection with the border, A rectangular reinforced concrete reinforcing slab 90 having a length Lm of 2 m in the direction of the cut-off portion 10 and a length Lm in the direction of the embankment 20 is provided. When the angle? Is less than 75 degrees, the reinforcing concrete reinforcing slab 90 of the parallelogram shown in FIG. 2H is applied. More specifically, as shown in FIG. 2h, points a and b A point extending from the cut-off portion nearest to the cut-off portion 10 in the direction of the cut-off portion 10 among the intersections between the connecting line (average main line) connecting the connecting portion and the boundary line indicating the width D ₁ of the reinforcing concrete reinforcing slab 90 And an embankment boundary line extending at an angle of 75 DEG downward from a point extending from the embankment point nearest point b 'to the embankment 20 direction Lm Reinforced concrete slabs 90 having a parallelogram shape formed by the reinforcing concrete slabs 90a and 90b. The structure of the reinforced concrete reinforcing slab 90 of the parallelogram shape can be similarly applied to other embodiments to be described later, and a detailed description thereof will be omitted.

2f to 2g, when the cutaway interface 30 in which the cut soil 10 and the fillet 20 are in contact with each other is not formed at a right angle to the road surface roughness progression direction and is formed diagonally, It may be desirable to arrange the transverse grout reinjection tube 100h parallel to the cut facet interface 30 at the bottom of the reinforced concrete reinforcement slab 90 as shown in Figure 2i. If the intersections of the folded surfaces are curved, if the points (a, b) intersecting the parallel lines forming the road wheel width Do are connected by a straight line, the connecting line (average main line) ) And the transverse grouting reinjection tube 100h would preferably be disposed parallel to the cut facet interface 30 set by this average dominant line.

The following is a description of various embodiments in which the present invention is applied to the interdimensional boundary between the cut part and the embankment. Hereinafter, the second embodiment related to the reinforcement of the concrete pavement in the box- Referring to FIG. 4D, FIG.

4A, the present embodiment includes a box structure 200 and a box covering layer 210 covering the box structure 200, covering the box structure 200 with the same material as the auxiliary base layer 40, a filler 20, and an auxiliary layer 40 In this case, the lower portion of the packed concrete body 200s is moved forward from the front end of the box structure 200, for example, to the lower portion of the packed concrete structure 200s as in the above-described folded step of the first embodiment. The reinforcing concrete reinforcing slab 90 is installed to extend from the rear end of the box structure 200 to the rear side of the reinforcing concrete reinforcing slab 90 in the region of the embankment 20 where the ground supporting force is relatively weak, A grouting reinforcement pipe 100 (100 h, 100 v) is buried in the lower part of the box structure 200 and the ground supporting force is higher than that of the box structure 200, which is a region where the ground supporting force is relatively strong. A reinforcing concrete reinforcing slab reinforcing the surrounding ground by injecting the grouting material through the grouting material injection pipe 100 (100h, 100v) when the relative settlement amount of the fillet 20 which is a weak region is exceeded, The grouting reinforcement pipe 100h in the grouting reinjection pipe 100 is seen through a road cross-sectional view (section AA in FIG. 4B) of FIG. 4C, Reinforced concrete slab 90, and the rear end thereof is installed so as to extend outward from the road surface. The detailed view of this lateral grouting re-injection tube 100h is the same as Figs. 3d and 3e. As shown in FIG. 4A, the horizontal grouting re-injection pipes 100h are arranged in a longitudinal direction at a predetermined interval (for example, at an interval of 1500 mm) along the road, As shown in the plan view of Figs. 2e and 2f, described above. In a special case, as shown in Fig. 4b, when the box structure 200 traverses the road obliquely and the inclined boundary surface 30 is inclined It is preferable to arrange them in a direction parallel to this refractory interface. For the shape of the reinforcing concrete reinforcing slab 90 itself in this case, the embodiments described above with reference to Figs. 2F to 2H can be effectively applied. 4d, a longitudinal grouting material injection tube 100v is installed in the middle center structure 80 at the center of the road, and the longitudinal grouting material injection tube 100v is connected to the center separation structure 80, Of the reinforcing concrete reinforcing slab 90 or the lower portion of the first frostbreak prevention layer 45a below the lean concrete layer 50. Alternatively, the median separator structure 80, and in the absence of a median strip structure, it is preferable to install the median strip in such a manner that it is not excessively projected in consideration of stability. It is a matter of course that the detailed construction and utilization of the grouting re-injection tube 100 (100h, 100v) itself can be explained in the same manner as in the embodiment described above.

Referring to FIGS. 5A to 5D, a third embodiment of the present invention is applied to a bridge-to-earth connection section. Referring to FIG. 5A, the bridge 310 supports the end of the bridge 300, A bridge connecting slab 320 and a buffering slab 330 are installed as reinforcing concrete reinforcing slabs between the bridge connecting slab 310 and the bridge connecting slab 310. The bridge connecting slab 320 and the buffering slab 330 are installed as reinforcing concrete reinforcing slabs. 100h and 100v are extended to the lower portion of the buffering slab 330. In the grouting re-injection tube 100 (100h, 100v) thus installed, the transverse grouting material injection tube 100h is shown in Fig. 5B (sectional view taken along line AA in Fig. 5A) and Fig. 5C Is installed transversely to the lower portion of the bridge pavement 300s and the bridge connecting slab 320 and to the upper portion of the inversion prevention layer 340 of the fillet 20 and bridge backfill as shown in Fig. 100v) extends through the median strip structure 80 and extends into the bedpan as shown in Figure 5d (cross-sectional view taken along the line CC in Figure 5a).

As described above, the detailed structure, arrangement, or operation of the grouting re-injection tube 100 according to the first embodiment of the present invention described with reference to FIGS. 3C to 3E, And the description of the detailed structure, arrangement, or operation of the reinforced concrete reinforcing slab 90 described with reference to Figs. 2D to 2I can be applied to all the embodiments in common.

The reinforcing concrete reinforcing slabs 90 and 320 installed on the lower portions of the pavement concrete layer 60 and the lean concrete layer 50 according to the technical idea of the present invention on the roads to which the concrete pavement is applied, And the longitudinal deflection length of the concrete pavement due to the uneven settlement is extended to improve ride comfort and stability of the vehicle traveling on the upper part of the concrete pavement, And a reinforcing slab such as a reinforced concrete reinforcing slab or a bridge connecting slab supporting the ground, even if continuous settlement of the ground is relatively weak on the basis of the boundary, So that the reinforcing slab and the lower ground are separated from each other Prevented, and provides the effect of ensuring a higher safety so as to prevent damage or by that of the upper portion of the package body and the lower reinforcement of the ground slab is impaired.

In addition, the length of the reinforced concrete reinforcing slab is limited to a certain length (cut length: 2 m, the length of the embankment is Lm along the embankment length) from an economical point of view. The grouting material is injected into the grouting re-injection pipe 100 to fill the gap between the roadbed formed by the concrete and the ground to support the roadbed to limit the degree of settlement, thereby protecting the pavement concrete layer Effect.

Claims (22)

delete delete In this paper, we propose a method to reinforce the ground reinforcement around the boundary, which shows the non - uniformity of the ground supporting force on the road with concrete pavement. A reinforced concrete reinforcing slab extending along the inside or the lower portion of the concrete pavement is installed so that the relative settlement amount of the region where the ground supporting force is relatively weak is measured in a region where the ground supporting force is relatively strong, Reinforcing slab is reinforced by inserting a grouting material in the lower portion of the reinforcing concrete reinforcing slab to fix the reinforcing concrete reinforcing slab and to reinforce the surrounding ground, The reinforcing concrete slab according to any one of claims 1 to 3, wherein the reinforcing concrete slab is a reinforced concrete reinforcing slab, Further comprising the step of disposing a longitudinal grouting reinforcement pipe extending to the bottom of the reinforced concrete reinforcing slab. [5] The method of claim 3, wherein the concrete pavement comprises a lean concrete layer and a pavement concrete layer thereon, the reinforcing concrete reinforcing slab extending along the inside or the lower portion of the lean concrete layer, The grouting re-injection pipe is disposed below the reinforcing concrete reinforcing slab, and the longitudinal grouting material injection pipe penetrates the median separating structure, the median separating base concrete, the in-phase preventing layer and the lean concrete layer on the pavement concrete layer, Wherein the reinforced concrete reinforcing slab is extended and disposed on the concrete pavement. [6] The method of claim 4, wherein the boundary forms an abutment interface between the cut-out portion and the embankment so as to reinforce the settlement amount of the concrete pavement with the reinforced concrete reinforcement slab. 6. The method of claim 5, wherein, when the main line of the meshed boundary forms a curved line or a diagonal line, a point intersecting the parallel line forming the width of the road is connected in a straight line, A rectangular reinforced concrete reinforcing slab is applied when the angle exceeds 75 °, and when the angle is less than 75 °, the reinforcing concrete slab is divided into a parallelogram A method for reinforcing a ground based on settlement control of a concrete pavement with a reinforced concrete reinforcing slab, characterized in that a reinforcing concrete reinforcing slab is applied. [7] The method according to claim 6, wherein, in the case where the main line of the refractory interface forms a curved line or a diagonal line, the transverse grouting material injection tube disposed below the parallelogram or rectangular reinforced concrete reinforcing slab Wherein the reinforcing slab is disposed in parallel with the slab of the concrete pavement. 5. The method as claimed in claim 4, wherein the boundary is an interface between the box structure below the concrete pavement and the box covering layer covering the concrete pavement, the embankment and the auxiliary layer covering the box covering layer, A reinforcing concrete reinforcing slab is provided at a lower portion of the reinforcing concrete reinforcing slab so as to extend forward from a front end of the box structure and rearward from a rear end of the box structure, Wherein the grouting re-injection pipe and the longitudinal grouting material injection pipe are previously buried in the reinforcing concrete reinforcing slab. The method as claimed in claim 8, wherein, when the main line of the interface forms a curved line or an oblique line, a point intersecting the parallel line forming the width of the road is connected by a straight line, A rectangular reinforced concrete slab is applied when the angle is greater than 75 ° and a parallelogram reinforced concrete reinforcing slab is applied when the angle is less than 75 °. Wherein a slab is applied to the reinforced concrete reinforced concrete slab. The method according to claim 9, wherein, when the main line of the refractory interface forms a curved line or an oblique line, the transverse grouting material injection tube disposed below the parallelogram or rectangular reinforced concrete reinforcing slab is connected to the main line Wherein the reinforcing slab is disposed in parallel with the slab of the concrete pavement. 5. The bridge connecting slab as set forth in claim 4, wherein the boundary portion is an interface between a bridge and a connection portion of the bridge during road rolling, the reinforcing concrete reinforcing slab is installed in the form of a buffering slab and a bridge connecting slab, Wherein the lateral grouting material injection tube and the longitudinal grouting material injection tube are extended to the lower portion of the buffer slab of the cut-off portion. The ground reinforcement method for controlling the settlement amount of the concrete pavement with the reinforced concrete reinforcing slab . A method of reinforcing a ground around a cut-off step, which indicates non-uniformity of the ground support force on a road to which concrete pavement is applied, is characterized in that in installing a reinforced concrete reinforcement slab around the cut- The installation length of the reinforced concrete reinforcing slab installed in the cut-out portion is limited to a length selected from the range of 1 m to 3 m, and the installation length of the reinforced concrete reinforcing slab installed in the embankment is (L) that is set in proportion to the following formula (2) with respect to the long-term settlement amount h estimated according to the equation (1) (1) h =? X H In this case, H is the sedimentation coefficient (based on the embankment height of 20 m in the lateral direction from the Biblical interface), and α is the settlement coefficient, 0.15% for the 3-year short- For long-term settlement calculations, 0.45% is applied, (2) L = h / tan? Where h is the settling amount according to the embankment height (H), θ at tan θ is the allowable subsidence angle, In the case where the relative settlement amount of the region where the ground supporting force is relatively weak for the region where the ground supporting force is relatively strong is measured and the relative settlement amount exceeds the predetermined value, grouting material is injected into the lower portion of the reinforcing concrete reinforcing slab, And a step of burying a lateral grouting material injection pipe in a lower portion of the reinforced concrete reinforcing slab in order to support the slab and reinforce the surrounding ground, wherein the settlement of the concrete pavement with the reinforced concrete reinforcing slab Control - based ground reinforcement method. 14. The method according to claim 12, wherein 0.006 is applied to the value of tan? With respect to the allowable subsidence angle (?) In the equation (2). Reinforcement method. 13. The method of claim 12, further comprising disposing a longitudinal grouting material injection pipe extending to a lower portion of the reinforcing concrete reinforcing slab or the anti-frost layer at a predetermined interval along a center portion between an upper line and a lower line of the concrete pavement Wherein the reinforcing steel reinforcing slab is a reinforced concrete reinforced concrete slab. 15. The method according to any one of claims 3 to 14, wherein the transverse grouting material injection pipes are arranged in a transverse direction at regular intervals along the road surface, and the center grooves And the distance (B) between the long grouting material inlet pipe and the short grouting material injection pipe are alternately arranged on the basis of the control of the settlement amount of the concrete pavement with the reinforced concrete reinforcing slab . The apparatus according to any one of claims 3, 4, 5, 6, 7, 8, 9, 10, 11, and 14, wherein the diameter of the longitudinal grouting reinforcement tube is greater than the diameter of the transverse grouting reinforcement tube The method according to claim 1, wherein the reinforcing steel slab is a reinforced concrete slab. The method of any one of claims 3, 4, 5, 6, 7, 8, 9, 10, 11, and 14, wherein when the grouting material is injected through the transverse grouting material injection tube, Wherein the injection pipe acts as an air vent for smoothly injecting the grouting material. The method of reinforcing the ground based on the settlement amount of the concrete pavement with the reinforced concrete reinforcing slab. 15. A method according to any one of claims 3 to 14, characterized in that a discharge hole is formed at the tip end of the transverse grouting material injection tube and the tip end of the transverse grouting material injection tube is covered with a plastic cover A Method for Ground Reinforcement Based on Settlement Control of Concrete Pavement with Concrete Reinforced Slab. 15. A method according to any one of claims 3 to 14, wherein the leading end of the transverse grouting material injection tube is capped with a protective cap and a discharge hole is formed circumferentially in the transverse grouting material injection tube, Wherein the reinforcing concrete slab has a backflow prevention valve structure for surrounding the reinforced concrete slab with a rubber sleeve. The grouting apparatus according to any one of claims 3 to 14, wherein a rear end portion of the grouting material injected from the lateral grouting material injection pipe is covered with a protective cap so as to protrude to the outside of the bedrock, So that the grouting material can be injected into the concrete pavement. The ground reinforcement method based on the settlement amount control of the concrete pavement with the reinforced concrete reinforcing slab. The grouting material as claimed in any one of claims 3, 4, 5, 6, 7, 8, 9, 10, 11, and 14, So that the grouting material can be connected to the grouting material to allow the grouting material to be injected. The method of reinforcing the ground based on the settlement amount of the concrete pavement with the reinforced concrete reinforcing slab. 15. A method according to any one of claims 3 to 14, wherein the grouting material injected to provide enhanced support to the concrete pavement comprises cement milk having a water / cement ratio (w / c) of 0.45 to 0.5 A method of reinforcing ground based on settlement control of concrete pavement with reinforcing concrete reinforcing slab.

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