Reinforced railroad bed structure

Abstract

The utility model discloses a reinforced railroad bed structure. In an area with rich rainfall, a large amount of water can be accumulated on the surface layer of a roadbed and in a slope protection, a shallow slip crack surface is formed, and the roadbed sinks. One grouting pipe is arranged along each of the two transverse sides of the railway roadbed, and one grouting pipe is arranged at a certain interval along the trend of a line; the cross section of the grouting pipe is circular, a plurality of grouting holes are formed in the center of the top of the grouting pipe in the length direction, and the grouting holes are vertically formed; the cross sections of the grouting holes are circular and are gradually increased from outside to inside; a plug is arranged in a grouting hole in the grouting pipe, the two ends of the plug are in the shape of symmetrically-arranged circular truncated cones, and the middle section of the plug is in the shape of a circular pile. Water drain pipes are arranged on two sides of the roadbed slope. A potential sliding surface is not easy to form in the slope protection structure, and the structural stability of the railroad bed in a rainwater-rich area is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the roadbed engineering technical field, concretely relates to a reinforced railway roadbed structure. BACKGROUND

[0002] Railway roadbed is the structure that bears and transmits track gravity and train dynamic action, and the foundation of track is the important building to ensure train operation. After long time operation, railway roadbed gradually subsides due to the repeated action of train load. In the area that rainfall is relatively rich, rainwater can gradually penetrate into the inside of railway roadbed through the surface of roadbed and the surface of slope protection, and a large amount of water can be accumulated in the surface layer of roadbed and the inside of slope protection, shallow slip surface is formed, and further, the subsidence of roadbed is caused. Therefore, a reinforced railway roadbed structure is urgently needed to ensure the structural stability of railway roadbed in the area that rainfall is relatively rich. SUMMARY

[0003] In order to make up for the deficiency of prior art, the utility model provides a reinforced railway roadbed structure, which improves the strength of roadbed body by grouting on both sides of roadbed, and improves the drainage efficiency of slope surface by the water drain pipe on both sides of slope, so that the potential sliding surface is not easily formed in the inside of slope protection, and the structural stability of railway roadbed in the area that rainfall is relatively rich is ensured.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A reinforced railway roadbed structure is characterized in that: horizontal grouting pipes are arranged on both sides of roadbed body, one grouting pipe is arranged on each lateral side of railway roadbed along the horizontal direction, and one grouting pipe is arranged every certain interval along the line direction;

[0006] The cross section of grouting pipe is circular, a plurality of grouting holes are arranged at the central position of top along the length direction, and the grouting holes are vertically arranged; the cross section of grouting hole is circular and gradually increases from outside to inside; a plug is arranged in the grouting hole of grouting pipe, the plug is circular truncated cone at both ends and is circular pile at the middle section; water drain pipes are arranged on both sides of roadbed slope.

[0007] Further, the plug is arranged in the grouting hole at the bottom end, the middle section and the top end.

[0008] Further, the grouting pipes on both sides are symmetrically arranged.

[0009] Further, a plurality of plain concrete piles are arranged at the central position of roadbed body.

[0010] Further, concrete plates are arranged on the slope on both sides of roadbed body.

[0011] Further, the water drain pipes are inserted into the concrete plates.

[0012] Further, each grouting pipe has a length of no more than 6m.

[0013] The utility model discloses the beneficial effect:

[0014] 1) the utility model discloses bilateral grouting, and the grouting pipe length is moderate, and the grouting coverage is big, and the grouting pipe forms the water sealing layer after grouting, and the slurry will form certain intensity after coagulation hardening, realizes the ground reinforcement;The plug is arranged in the grouting hole, and the slurry ejection speed is effectively controlled, and meanwhile the external impurity is not suitable to enter the pipe body interior;

[0015] 2) the utility model discloses that the roadbed slope both sides are provided with the drain pipe, improves the drainage efficiency of slope surface, and the potential sliding surface is not easy to form in the slope protection interior;

[0016] 3) the utility model discloses the plain concrete pile between the sleepers, further reduces the roadbed surface settlement, and guarantees the railway operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic drawing of the utility model embodiment;

[0018] Figure 2 It is the I-I schematic drawing of Figure 1 ;

[0019] Figure 3 It is the drain pipe arrangement schematic drawing;

[0020] Figure 4 It is the grouting pipe detail schematic drawing;

[0021] In the drawing: 1. concrete slab, 2. drain pipe, 3. grouting pipe, 3-1 plug, 4. plain concrete pile. DETAILED DESCRIPTION

[0022] The utility model will be explained in detail in connection with specific implementation.

[0023] The utility model discloses the technical problem that the railway roadbed is easy to sink in the rainwater rich area, provides a kind of reinforcing railway roadbed structure, railway roadbed, slope surface has collapsed, repair expensive etc. need to provide a kind of reinforcing railway roadbed structure, bilateral grouting, and the grouting pipe length is moderate, and the grouting coverage is big, and simultaneously drain pipe significantly improves the drainage efficiency of slope surface, and construction is convenient, is favorable to save engineering cost, can significantly alleviate the subsidence of railway roadbed, effectively prevent the water in roadbed surface from penetrating to interior, and the potential sliding surface is not easy to form in the slope protection interior.

[0024] As Figure 1 , 2As shown, the roadbed body is provided with horizontal grouting pipes 3 on both sides, one grouting pipe 3 is arranged on each lateral side of the roadbed along the railway, and one grouting pipe 3 is arranged every certain interval along the line direction; the grouting pipes 3 on both sides are symmetrically arranged; the length of each grouting pipe 3 is not more than 6 m. In the embodiment, the inner diameter of the grouting pipe 3 is 8 mm, the outer diameter is 20 mm, and the inner diameter tolerance is ±0.3 mm. Through the grouting process, the slurry is uniformly diffused into the rock-soil body under the action of grouting pressure, and after the slurry is solidified, the foundation forms a whole, thereby realizing the effect of foundation reinforcement.

[0025] As shown in the figure, Figure 4 The cross section of the grouting pipe 3 is circular, a plurality of grouting holes are arranged at the top center position and along the length direction, and the grouting holes are vertically arranged; the cross section of the grouting hole is circular and gradually increases from outside to inside, and is in a horn shape; a plug 3-1 is arranged in the grouting hole of the grouting pipe 3, the two ends of the plug 3-1 are symmetrically arranged in a circular truncated cone shape, and the middle section is in a circular pile shape; the bottom end, the middle section and the top end part of the plug 3-1 are arranged in the grouting hole. The embedded grouting pipe is a multiple-use grouting pipe. When it is necessary to inject slurry into the roadbed surface layer multiple times to achieve the purpose of sealing the water layer, the grouting pipe can also be used as a drainage pipe to drain to the slope drainage.

[0026] When the material of the plug 3-1 is metal, the surface should be treated for corrosion prevention; when grouting, the plug 3-1 moves upward under the action of slurry pressure, the middle section size is smaller than the size of the grouting hole, so that the slurry can flow out of the grouting hole well, and when the grouting is completed, the plug 3-1 seals the grouting hole under the action of gravity to ensure that the inside of the pipe is unobstructed and foreign matter cannot enter the inside of the pipe body.

[0027] The side slopes of the roadbed body are respectively provided with concrete slabs 1, the concrete slabs adopt a prefabricated structure with reserved holes, and the construction is convenient; as Figure 3 shown, the drain pipe 2 is inserted into the concrete slab 1, effectively improving the slope surface drainage efficiency, and when the slope back is empty, the drain pipe 2 can be reserved for use as a grouting pipe. In the embodiment, the side length of the concrete slab 1 is 0.6m*0.3m, the reserved drain pipe diameter is 5cm, C30 or above concrete is used, and the drilling depth is more than 1m. The cross section shape of the concrete slab 1 is rectangular, and one or two reserved holes are arranged in the middle of the concrete slab 1.

[0028] A plurality of plain concrete piles 4 are arranged at the center position of the roadbed body, which can further reduce the roadbed surface settlement and ensure the safety of railway operation. The plain concrete pile selects a suitable pile diameter according to the spacing between the sleepers, and in the embodiment, the pile diameter is 0.2m.

[0029] The construction sequence of the utility model is as follows:

[0030] Excavate sleeper interval pile hole → pour plain concrete pile → drill and insert slope grouting pipe → grouting → set slope concrete slab → insert slope drain pipe.

[0031] Before installation, the base surface is cleaned, the base surface should be flat, dry and wet base surface can be used. The outer side of the grouting pipe should be firmly fixed on the slope surface of the roadbed surface. The grouting pipe is inserted into the inner side of the roadbed, the end of the guide pipe is protected by adhesive tape to prevent blockage and damage. The concrete plate adopts prefabricated structure, which is transported to the site after prefabrication and installed on the slope soil, the concrete plate installation adopts extrusion grouting method, and the grouting method is strictly prohibited. After the concrete plate construction is completed, the drill machine is used to drill a certain depth at the reserved hole position of the concrete plate, and the drain pipe is firmly installed in the hole. The pipe body of the drain pipe buried in the soil part is uniformly arranged along the radial direction.

[0032] In the description of the utility model, unless there is definite provision and limitation, the terms "set", "install", "connect", "connect", "fix" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or be integrated, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship of two elements inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0033] The content of the utility model is not limited to the examples listed in the embodiment, any equivalent transformation of the technical scheme of the utility model adopted by the person skilled in the art by reading the utility model specification is covered by the claims of the utility model.

Claims

1. A reinforced railway subgrade structure, characterized in that: Horizontal grouting pipes (3) are respectively installed on both sides of the roadbed. One grouting pipe (3) is installed on each side of the railway roadbed in the transverse direction, and one is arranged at a certain interval along the line. The grouting pipe (3) has a circular cross-section and multiple grouting holes are provided at the top center along the length direction. The grouting holes are arranged vertically. The cross-section of the grouting holes is circular and gradually increases from the outside to the inside. A plug (3-1) is provided in the grouting hole on the grouting pipe (3). The two ends of the plug (3-1) are symmetrically arranged in a frustum shape, and the middle section is a round pile shape. Drainage pipes are installed on both sides of the roadbed slope (2).

2. The reinforced railway subgrade structure according to claim 1, characterized in that: The bottom, middle and top sections of the plug (3-1) are placed inside the grouting hole.

3. A reinforced railway subgrade structure according to claim 2, characterized in that: The grouting pipes (3) on both sides are symmetrically arranged.

4. A reinforced railway subgrade structure according to claim 3, characterized in that: Multiple plain concrete piles (4) are installed at the center of the roadbed.

5. A reinforced railway subgrade structure according to claim 4, characterized in that: Concrete slabs (1) are installed on both sides of the roadbed slope.

6. A reinforced railway subgrade structure according to claim 5, characterized in that: The drain pipe (2) is inserted into the concrete slab (1).

7. A reinforced railway subgrade structure according to claim 6, characterized in that: Each grouting pipe shall not exceed 6m in length.

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