Roadbed reinforcing structure of highway box type channel

Abstract

The utility model provides a roadbed reinforcing structure of a highway box-type channel, which comprises a roadbed structure layer laid on the back of the box-type channel, geogrids are laid on the roadbed structure layer and the top of the box-type channel, fixing hooks are reserved on the side of the box-type channel, the geogrids are connected with the fixing hooks through first U-shaped ground anchors, and the first U-shaped ground anchors are connected with the box-type channel through second U-shaped ground anchors. And the geogrid is fixed on the roadbed structure layer through a second U-shaped anchor nail. The structure has the advantages that the construction speed is high, the construction period is shortened, the locking effect on the roadbed structure layer is good, the stability is high, and the problem of bump at the bridgehead is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a road engineering technical field, concretely relates to a roadbed reinforcing structure of highway box type passage. BACKGROUND

[0002] The "bridge head bumping" is the most common quality common fault in the process of highway project construction, but there is still lack of effective solution. At present, the more common is to carry out the bridge head batten processing under the premise of strengthening the backfill material selection and compaction degree detection, but there still exist the defects of the limited batten length and the expansion of differential settlement position in long-term operation.

[0003] In view of the above problems, we pass through a lot of research and development, through the influence factor analysis, theory research and field test, adopt a kind of solution highway box type passage bridge head bumping problem's roadbed reinforcing structure, form a kind of with the design embedded part of box culvert side wall and geotechnical reinforcement connection, form rigid, flexible body collaborative settlement mode, improve the ability of backfill soil diffusion load and reduce settlement, thereby reduce bridge head wrong station, reach the purpose of solving "bridge head bumping". CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a roadbed reinforcing structure of highway box type passage.

[0005] The technical scheme of the utility model is realized as follows:

[0006] A kind of roadbed reinforcing structure of highway box type passage, including the roadbed structure layer being laid in the back of box type passage station, the top of the roadbed structure layer and the top of the box type passage are laid with geogrid, the side of the box type passage is reserved with fixed hook, the geogrid is connected with the fixed hook by first U type anchor nail, and the geogrid is fixed on the roadbed structure layer by second U type anchor nail.

[0007] Further, the roadbed structure layer includes gravel layer and coarse sand layer laid on the top of the gravel layer, and the geogrid is laid on the coarse sand layer.

[0008] Further, the second U type anchor nail is arranged in a square shape.

[0009] Further, the thickness of the gravel layer is 5m, the backfill thickness of each gravel layer is 0.2m, and the compaction thickness of each gravel layer is 0.15m.

[0010] Further, the lower limit plate is rotatably installed on both sides of the bottom end of the first U type anchor nail, and the upper limit plate is inserted into the first U type anchor nail, so that the bottom end of the lower limit plate swings to both sides of the bottom of the fixed hook by pressing the top of the lower limit plate.

[0011] Further, the lower limit plate comprises an upper flat section and a lower flat section arranged in an up-down manner, and when any one of the upper flat section and the lower flat section is in a vertical state, the other one is in a state of extending into the inner cavity of the first U-shaped anchor.

[0012] Further, the lower limit plate comprises an upper flat section and a lower flat section arranged in an up-down manner, and when any one of the upper flat section and the lower flat section is in a vertical state, the other one is in a state of extending into the inner cavity of the first U-shaped anchor.

[0013] Further, the upper limit plate comprises a main body part and a limiting part, the main body part is in a U structure, the limiting part is arranged at the bottom end of the inner wall surface of the main body part on both sides, and the distance between the top ends of the two limiting parts is smaller than the outer diameter of the fixed hook.

[0014] Further, the top of the main body part is connected with the top of the first U-shaped anchor through a fastening screw.

[0015] The utility model has the advantages of the following:

[0016] 1. Compared with the bridge head cover plate, the uneven settlement of the roadbed is reduced, and the anti-deformation ability of the embankment is improved by laying the geogrid and connecting and anchoring the box channel.

[0017] 2. The first U-shaped anchor, the second U-shaped anchor and the geogrid are used for fixing, and the structure forms a whole stress structure with the structure, and the stability of the soil body is improved through the locking effect of the geogrid on the roadbed structure layer.

[0018] 3. The laying of the geogrid can improve the modulus of resilience of the roadbed to different degrees, improve the ability of the backfill of the abutment to diffuse load and reduce settlement, thereby reducing the abutment error of the bridge head, and achieving the purpose of solving the bumping of the bridge head. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the schematic diagram of the roadbed reinforcing structure of the utility model road box channel;

[0020] Figure 2 is the schematic diagram of the utility model Figure 1 is the enlarged view of A in the utility model;

[0021] Figure 3 is the schematic diagram of the utility model Figure 1 is the schematic diagram of the first U-shaped anchor and the fixed hook in the utility model;

[0022] Figure 4 is the schematic diagram of the recess in the utility model;

[0023] Figure 5It is the schematic view of upper and lower limiting plates.

[0024] In the figure: 1, subgrade structure layer; 1.1, coarse sand layer; 1.2, gravel layer; 2, geogrid; 3, fixed hook; 4, first U-shaped anchor; 5, second U-shaped anchor; 6, lower limiting plate; 6.1, upper straight section; 6.2, lower straight section; 7, upper limiting plate; 7.1, main body part; 7.2, limiting part; 8, groove; 9, fastening screw. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] As Figures 1 to 5 shown, a typical embodiment of the utility model provides a subgrade reinforcing structure of highway box type passage, characterized in that, including the subgrade structure layer 1 laid in the abutment of box type passage, the top of the box type passage is laid with the geogrid 2, the side of the box type passage is reserved with the fixed hook 3, the geogrid 2 is connected with the fixed hook 3 through the first U-shaped anchor 4, and the geogrid 2 is fixed on the subgrade structure layer 1 through the second U-shaped anchor 5.

[0027] Through the cooperation of the first U-shaped anchor 4 and the fixed hook 3, the geogrid 2 is fixed, the uneven settlement of the subgrade is reduced, the deformation resistance of the embankment is improved, at the same time, the first U-shaped anchor 4, the second U-shaped anchor 5 and the geogrid 2 are used to fix, and the structure and the structure form an integral stress structure, and the stability of the soil body is improved through the locking effect of the geogrid 2 on the backfill material.

[0028] Among them, the subgrade structure layer 1 includes the gravel layer 1.2 and the coarse sand layer 1.1 laid on the top of the gravel layer 1.2, and the geogrid 2 is laid on the coarse sand layer 1.1. The coarse sand layer 1.1 avoids the geogrid 2 from being broken by directly contacting with the gravel, and in the specific construction, the geogrid 2 in bundles is unfolded from the abutment back, and the geogrid 2 is laid according to the design length.

[0029] The second U-shaped anchor 5 is arranged in a square. The second U-shaped anchor 5 is arranged in a square every 2m in the transverse and longitudinal directions of the geogrid 2 and is driven into the structure layer for fixation.

[0030] The thickness of the gravel layer 1.2 is 5 m, the backfill thickness of each gravel layer 1.2 is 0.2 m, the gravel layer 1.2 is rolled in sixteen steps, and the compaction thickness of each gravel layer 1.2 is 0.15 m.

[0031] The lower limit plate 6 is rotatably installed on both sides of the bottom end of the first U-shaped anchor 4, and the upper limit plate 7 is inserted into the first U-shaped anchor 4. The upper limit plate 7 makes the bottom end of the lower limit plate 6 swing to the bottom of the fixed hook 3 by pressing the top of the lower limit plate 6.

[0032] The cooperation of the upper limit plate 7 and the lower limit plate 6 improves the connection effect and stability of the first U-shaped anchor 4 and the fixed hook 3, and improves the stability effect.

[0033] The lower limit plate 6 includes an upper flat section 6.1 and a lower flat section 6.2 arranged in an up-down manner, and when any one of the upper flat section 6.1 and the lower flat section 6.2 is in a vertical state, the other is in a state of one end extending into the inner cavity of the first U-shaped anchor 4. During the insertion of the first U-shaped anchor 4, the lower limit plate 6 is in an initial state, at this time, the lower limit plate 6 is in a vertical state of the lower flat section 6.2, so that the lower flat section 6.2 moves downward from both sides of the fixed hook 3 to below the fixed hook 3.

[0034] The recess 8 is formed at both ends of the bottom of the first U-shaped anchor 4, and the lower limit plate 6 is rotatably installed in the recess 8, and when the upper flat section 6.1 or the lower flat section 6.2 is in a vertical state, the outer side surface of the upper flat section 6.1 or the lower flat section 6.2 is in contact with the outer side inner wall surface of the recess 8.

[0035] During the insertion of the first U-shaped anchor into the roadbed structure layer 1, the lower flat section 6.2 is in a vertical state, and the outer side surface of the lower flat section 6.2 is in contact with the inner side wall of the recess 8, and the upper flat section 6.1 is in a state of the top end inward and inclined upward. Further, the roadbed structure layer 1 applies an upward resistance to the upper flat section 6.1, and the resistance cooperates with the inner side wall of the recess 8 to lock the lower limit plate 6 in a vertical downward state at the bottom end, so as to ensure that the lower limit plate 6 can effectively pass from both sides of the fixed hook 3.

[0036] The upper limit plate 7 includes a main body part 7.1 and a limiting part 7.2, the main body part 7.1 is in a "U" shape structure, and the limiting part 7.2 is arranged at the bottom end of the inner wall surface of the main body part 7.1 on both sides, and the distance between the top ends of the two limiting parts 7.2 is less than the outer diameter of the fixed hook 3.

[0037] After the first U-shaped anchor 4 is inserted into the gap between the fixed hook 3 and the box-shaped channel, the upper limiting plate 7 is displaced downward and presses the top end of the lower limiting plate 6, so that the lower limiting plate 6 is deflected. The bottom end of the lower limiting plate 6 is turned inward to the bottom of the fixed hook 3, at this time, the space between the upper limiting plate 7 and the lower limiting plate 6 forms a strip-shaped space, which provides a gap for the up-and-down movement of the first U-shaped anchor 4 on the fixed hook 3, and further forms a certain buffer space to ensure better stability.

[0038] The top of the main body part 7.1 is connected with the top of the first U-shaped anchor 4 through the fastening screw 9. The fastening screw 9 fixes the upper limiting plate 7 on the first U-shaped anchor 4, thereby maintaining the effective fixing effect on the lower limiting plate 6 and keeping the buffer space fixed, and further improving the stability effect.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roadbed reinforcement structure for a highway box girder tunnel, characterized in that, The system includes a roadbed structure layer laid on the back of the box-shaped channel abutment. A geogrid is laid on the top of the roadbed structure layer and the box-shaped channel. Fixed hooks are reserved on the side of the box-shaped channel. The geogrid is connected to the fixed hooks by a first U-shaped anchor and fixed to the roadbed structure layer by a second U-shaped anchor.

2. The roadbed reinforcement structure for a highway box girder tunnel according to claim 1, characterized in that, The roadbed structure layer includes a gravel layer and a coarse sand layer laid on top of the gravel layer, and the geogrid is laid on the coarse sand layer.

3. The roadbed reinforcement structure for a highway box girder tunnel according to claim 1, characterized in that, The second U-shaped anchor is arranged in a square.

4. The roadbed reinforcement structure for a highway box girder tunnel according to claim 2, characterized in that, The gravel layer is 5m thick, the backfill thickness of each gravel layer is 0.2m, and the compaction thickness of each gravel layer is 0.15m.

5. The roadbed reinforcement structure for a highway box girder tunnel according to claim 1, characterized in that, Lower limit plates are rotatably installed on both sides of the bottom end of the first U-shaped anchor. An upper limit plate is inserted into the inside of the first U-shaped anchor. The upper limit plate causes the bottom end of the lower limit plate to swing to both sides of the bottom of the fixed hook by pressing down the top of the lower limit plate.

6. The roadbed reinforcement structure for a highway box girder tunnel according to claim 5, characterized in that, The lower limiting plate includes an upper straight section and a lower straight section that are distributed vertically. When either the upper straight section or the lower straight section is in a vertical state, the other section is in a state where one end extends into the inner cavity of the first U-shaped anchor.

7. The roadbed reinforcement structure for a highway box girder tunnel according to claim 6, characterized in that, The first U-shaped anchor has grooves at both ends at the bottom. The lower limiting plate is rotatably installed in the groove. When the upper or lower straight section is in a vertical state, the outer side of the upper or lower straight section contacts the outer inner wall of the groove.

8. The roadbed reinforcement structure for a highway box girder tunnel according to claim 5, characterized in that, The upper limit plate includes a main body and a limiting part. The main body has a "U" structure. The limiting part is located at the bottom of the inner wall surface on both sides of the main body, and the distance between the tops of the two limiting parts is less than the outer diameter of the fixed hook.

9. The roadbed reinforcement structure for a highway box girder tunnel according to claim 8, characterized in that, The top of the main body is connected to the top of the first U-shaped anchor by a fastening screw.

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