High fill roadbed monitoring device

Abstract

The utility model relates to the technical field of high-fill roadbed monitoring, and discloses a high-fill roadbed monitoring device which comprises a hard soil layer and a sludge layer flatly laid on the hard soil layer. The leveling layer is laid on the sludge layer, a roadbed is arranged above the leveling layer, and a sand cushion layer is arranged between the bottom surface of the roadbed and the leveling layer; side piles are vertically arranged in the leveling layer and correspond to the two sides of the sand cushion layer. A settlement mark is arranged in the roadbed, and the top end of the settlement mark extends to the position above the roadbed. A settlement mark is adopted to observe the subgrade ground surface settlement amount, the embankment filling rate can be adjusted according to observation data, the settlement trend can be predicted, the pre-pressing unloading time and the structure and road surface construction time can be determined, and a basis is provided for main calculation of the settlement earth volume in the construction period; when the height of a soil layer has different requirements, the height of the settlement rod and the height of the plastic sleeve can be correspondingly increased along with the height increase of filled soil, and the practicability of the settlement mark is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high fill roadbed monitoring, in particular to a high fill roadbed monitoring device. Background Art

[0002] The roadbed is planned to be raised by filling. During the soft foundation treatment construction process, the deadweight of the embankment is used as the preload. When the soil is subjected to the load, normal stress and shear stress are generated at various points in the soil.

[0003] Under the action of shear stress, the soil undergoes shear deformation.

[0004] If the shear stress at a certain point reaches the shear strength at that point, the soil will slide relatively along the direction of the shear stress. If the load continues to increase, the area where the shear stress reaches the shear strength (i.e. the plastic zone) will become larger and larger, and finally a continuous sliding surface will be formed, causing one part of the soil to slide relative to another part of the soil, causing the strength of the entire soil to be destroyed and become unstable.

[0005] Therefore, a high fill roadbed monitoring device is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a high fill roadbed monitoring device to solve the stability problem existing in the high fill roadbed in the soft foundation treatment, and to propose a reinforcement maintenance technology for raising and widening the soft soil section embankment by using a back pressure berm (super-wide back pressure berm in the high water level section).

[0007] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a high fill roadbed monitoring device, comprising a hard soil layer;

[0008] and a silt layer laid flat on a hard soil layer;

[0009] and a leveling layer laid on the silt layer, a roadbed being arranged above the leveling layer, and a sand cushion being arranged between the roadbed surface and the leveling layer;

[0010] Side piles are vertically arranged on both sides of the corresponding sand cushion layer inside the leveling layer;

[0011] A settlement mark is provided inside the roadbed, and the top of the settlement mark extends above the roadbed;

[0012] A layered settlement pipe is vertically arranged on the top surface of the roadbed, and the bottom end of the layered settlement pipe passes through the roadbed, sand cushion layer, leveling layer and silt layer from top to bottom and extends to the inside of the hard soil layer. Pore water pressure gauge 1, pore water pressure gauge 2 and pore water pressure gauge 3 are arranged from top to bottom in the inside of the silt layer.

[0013] Preferably, the bottom ends of the side piles penetrate the leveling layer and extend to the silt layer, and inclinometer tubes are vertically arranged on the top surfaces of both sides of the leveling layer near the side piles. The two groups of inclinometer tubes are symmetrically arranged, and the bottom ends of the inclinometer tubes sequentially penetrate the leveling layer and the silt layer and extend to the inside of the hard soil layer.

[0014] Preferably, the first pore water pressure gauge is arranged at the top surface of the silt layer, the second pore water pressure gauge is arranged at the middle position of the silt layer, and the third pore water pressure gauge is arranged at the bottom surface of the silt layer.

[0015] Preferably, the settlement mark includes a base plate and a settlement rod, the base plate is horizontally arranged on the top surface of the sand cushion layer, the settlement rod is vertically arranged above the base plate, a base pipe is vertically fixed on the top surface of the base plate, and reinforcing ribs are evenly and vertically arranged on the outside of the base pipe, and the bottom and side surfaces of the reinforcing ribs are respectively fixedly connected to the top surface of the base plate and the side surfaces of the base pipe.

[0016] Preferably, an annular groove is provided vertically downward on the top surface of the bottom tube, and a threaded pipe joint is vertically fixedly provided on the bottom surface of the sinking rod. The inner wall of the annular groove is provided with a matching internal thread corresponding to the outer surface of the threaded pipe joint. The threaded pipe joint extends to the inside of the annular groove and is threadedly connected to the bottom tube.

[0017] Preferably, a plug is provided above the settlement rod, and a threaded pipe joint 2 is vertically fixed on the bottom end of the plug. An annular groove 2 is provided vertically downward on the top surface of the settlement rod, and a corresponding internal thread 2 is provided on the outer surface of the threaded pipe joint 2 corresponding to the annular groove 2. The bottom end of the threaded pipe joint 2 extends to the inside of the annular groove 2 and is threadedly connected to the settlement rod.

[0018] Preferably, a plastic sleeve is provided on the outer side of the sinking rod, the bottom end of the plastic sleeve extends between adjacent reinforcing ribs, and the top surface of the plastic sleeve contacts the bottom surface of the plug.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the high fill roadbed monitoring device,

[0020] 1) Observe the surface settlement of the roadbed using settlement markers. Based on the observed data, the embankment filling rate can be adjusted, the settlement trend can be predicted, the preloading unloading time and the structure and road surface construction time can be determined, and the main calculation of the settlement earthwork volume during construction can be provided;

[0021] 2) By setting up the bottom plate, settlement rod and plug through threaded connection, the whole settlement mark has better adaptability. When there are different requirements for the soil layer height, the settlement rod and plastic sleeve can be connected accordingly as the fill increases, thereby improving its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front sectional view of the overall structure of the utility model;

[0023] Figure 2 This is a schematic top view of the overall structure of the utility model;

[0024] Figure 3 This is a three-dimensional schematic diagram of the front structure of the settlement mark of the utility model;

[0025] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the settlement mark of the utility model;

[0026] Figure 5 This is a three-dimensional cross-sectional view of the front structure of the settlement marker of the utility model;

[0027] Figure 6 It is a three-dimensional schematic diagram of the plastic sleeve structure of the utility model.

[0028] In the figure: hard soil layer 1, silt layer 2, leveling layer 3, sand cushion layer 4, roadbed 5, side pile 6, settlement mark 7, bottom plate 71, settlement rod 72, plug 73, plastic sleeve 74, bottom pipe 75, threaded pipe joint 1 76, annular groove 1 77, reinforcing rib plate 78, annular groove 2 791, threaded pipe joint 2 792, inclinometer tube 8, layered settlement tube 9, pore water pressure gauge 1 10, pore water pressure gauge 2 11, pore water pressure gauge 3 12. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1:

[0031] See also Figures 1-6 , the utility model provides a technical solution: a high fill roadbed monitoring device, comprising a hard soil layer 1;

[0032] and a silt layer 2 laid flat on the hard soil layer 1;

[0033] and a leveling layer 3 laid on the silt layer 2, a roadbed 5 is arranged above the leveling layer 3, and a sand cushion layer 4 is arranged between the bottom surface of the roadbed 5 and the leveling layer 3;

[0034] Side piles 6 are vertically arranged on both sides of the corresponding sand cushion layer 4 inside the leveling layer 3;

[0035] A settlement mark 7 is provided inside the roadbed 5, and the top of the settlement mark 7 extends above the roadbed 5;

[0036] A layered settlement pipe 9 is vertically provided on the top surface of the roadbed 5. The bottom end of the layered settlement pipe 9 passes through the roadbed 5, the sand cushion layer 4, the leveling layer 3 and the silt layer 2 from top to bottom and extends to the inside of the hard soil layer 1. Inside the silt layer 2, pore water pressure gauge 10, pore water pressure gauge 2 11 and pore water pressure gauge 3 12 are provided from top to bottom.

[0037] The bottom ends of the side piles 6 pass through the leveling layer 3 and extend to the silt layer 2. Inclinometer tubes 8 are vertically installed on the top surfaces of both sides of the leveling layer 3 near the side piles 6. Two sets of inclinometer tubes 8 are symmetrically arranged. The bottom ends of the inclinometer tubes 8 pass through the leveling layer 3 and the silt layer 2 in sequence and extend to the inside of the hard soil layer 1. Pore water pressure gauge 10 is installed at the top surface of the silt layer 2, pore water pressure gauge 2 11 is installed in the middle of the silt layer 2, and pore water pressure gauge 3 12 is installed at the bottom surface of the silt layer 2.

[0038] The pore water pressure gauge 10 is set at the top surface of the silt layer 2, the pore water pressure gauge 11 is set at the middle position of the silt layer 2, and the pore water pressure gauge 3 12 is set at the bottom surface of the silt layer 2.

[0039] Furthermore, this embodiment uses settlement markers to observe the surface settlement of the roadbed. Based on the observed data, the embankment filling rate can be adjusted, the settlement trend can be predicted, the preloading unloading time and the structure and road surface construction time can be determined, and the main calculation of the earthwork settlement during the construction period can be provided.

[0040] Example 2

[0041] See also Figures 1-6 , and on the basis of Example 1, it is further obtained that: the settlement mark 7 includes a bottom plate 71 and a settlement rod 72, the bottom plate 71 is horizontally arranged on the top surface of the sand cushion layer 4, the settlement rod 72 is vertically arranged above the bottom plate 71, a bottom pipe 75 is vertically fixedly arranged on the top surface of the bottom plate 71, and reinforcing ribs 78 are evenly and vertically arranged on the outside of the bottom pipe 75, and the bottom and side surfaces of the reinforcing ribs 78 are fixedly connected to the top surface of the bottom plate 71 and the side surfaces of the bottom pipe 75 respectively;

[0042] An annular groove 77 is vertically downwardly provided on the top surface of the bottom tube 75. A threaded pipe joint 76 is vertically fixedly provided on the bottom surface of the sinking rod 72. The inner wall of the annular groove 77 is provided with a matching internal thread 1 corresponding to the outer surface of the threaded pipe joint 76. The threaded pipe joint 76 extends into the interior of the annular groove 77 and is threadedly connected to the bottom tube 75. A plug 73 is provided above the sinking rod 72. A threaded pipe joint 2 792 is vertically fixedly provided at the bottom end of the plug 73. An annular groove 2 791 is vertically downwardly provided on the top surface of the sinking rod 72. The annular groove 2 791 is provided with a matching internal thread 2 corresponding to the outer surface of the threaded pipe joint 2 792. The bottom end of the threaded pipe joint 2 792 extends into the interior of the annular groove 2 791 and is threadedly connected to the sinking rod 72.

[0043] A plastic sleeve 74 is provided on the outside of the sinking rod 72 . The bottom end of the plastic sleeve 74 extends between adjacent reinforcing ribs 78 , and the top end surface of the plastic sleeve 74 contacts the bottom surface of the plug 73 .

[0044] Furthermore, this embodiment provides a bottom plate 71, a settlement rod 72 and a plug 73 connected by threads, so that the entire settlement mark 7 has better adaptability. When there are different requirements for the height of the soil layer, the settlement rod 72 and the plastic sleeve 74 can be raised accordingly as the fill increases, thereby improving its practicality.

[0045] When in use, dig a pit of a size suitable for the base plate 71 at the burial site, level and compact the pit with yellow sand, place the base plate 71 flat in the pit, fill it with yellow sand on all sides and calibrate the level with a level, screw the settlement rod 72 onto the bottom pipe 75 to fix it, then put on the plastic sleeve 74 in turn, and finally screw on the plug 73 to start measurement.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high fill roadbed monitoring device, comprising a hard soil layer (1); and a silt layer (2) laid flat on the hard soil layer (1); and a leveling layer (3) laid on the silt layer (2), characterized in that: A roadbed (5) is provided above the leveling layer (3), and a sand cushion layer (4) is provided between the bottom surface of the roadbed (5) and the leveling layer (3); Side piles (6) are vertically arranged on both sides of the corresponding sand cushion layer (4) inside the leveling layer (3); A settlement mark (7) is provided inside the roadbed (5), and the top of the settlement mark (7) extends above the roadbed (5); A layered sedimentation pipe (9) is vertically arranged on the top surface of the roadbed (5), and the bottom end of the layered sedimentation pipe (9) passes through the roadbed (5), the sand cushion layer (4), the leveling layer (3) and the silt layer (2) in sequence from top to bottom and extends to the inside of the hard soil layer (1), and a pore water pressure gauge 1 (10), a pore water pressure gauge 2 (11) and a pore water pressure gauge 3 (12) are arranged in sequence from top to bottom inside the silt layer (2).

2. The high fill roadbed monitoring device according to claim 1, characterized in that: The bottom ends of the side piles (6) penetrate the leveling layer (3) and extend to the silt layer (2); inclinometer tubes (8) are vertically arranged on the top surfaces of both sides of the leveling layer (3) near the side piles (6); two groups of inclinometer tubes (8) are symmetrically arranged; the bottom ends of the inclinometer tubes (8) sequentially penetrate the leveling layer (3) and the silt layer (2) and extend to the inside of the hard soil layer (1).

3. The high fill roadbed monitoring device according to claim 1, characterized in that: The pore water pressure gauge 1 (10) is arranged at the top surface of the silt layer (2), the pore water pressure gauge 2 (11) is arranged at the middle position of the silt layer (2), and the pore water pressure gauge 3 (12) is arranged at the bottom surface of the silt layer (2).

4. The high fill roadbed monitoring device according to claim 1, characterized in that: The settlement mark (7) comprises a bottom plate (71) and a settlement rod (72), wherein the bottom plate (71) is horizontally arranged on the top surface of the sand cushion layer (4), and the settlement rod (72) is vertically arranged above the bottom plate (71). A bottom pipe (75) is vertically fixedly arranged on the top surface of the bottom plate (71), and a reinforcing rib plate (78) is evenly and vertically arranged on the outside of the bottom pipe (75), and the bottom surface and side surface of the reinforcing rib plate (78) are respectively fixedly connected to the top surface of the bottom plate (71) and the side surface of the bottom pipe (75).

5. The high fill roadbed monitoring device according to claim 4, characterized in that: The top surface of the bottom tube (75) is provided with an annular groove (77) extending vertically downward, and the bottom surface of the sinking rod (72) is provided with a threaded pipe joint (76) vertically fixedly arranged. The inner wall of the annular groove (77) is provided with a matching internal thread corresponding to the outer surface of the threaded pipe joint (76). The threaded pipe joint (76) extends to the inside of the annular groove (77) and is threadedly connected to the bottom tube (75).

6. The high fill roadbed monitoring device according to claim 5, characterized in that: A plug (73) is provided above the sinking rod (72), and a threaded pipe joint (792) is vertically fixed on the bottom end of the plug (73). An annular groove (791) is provided vertically downward on the top surface of the sinking rod (72), and an outer surface of the threaded pipe joint (792) is provided with a matching internal thread (791). The bottom end of the threaded pipe joint (792) extends to the inside of the annular groove (791) and is threadedly connected to the sinking rod (72).

7. The high fill roadbed monitoring device according to claim 6, characterized in that: The outside of the sinking rod (72) is covered with a plastic sleeve (74), the bottom end of the plastic sleeve (74) extends between adjacent reinforcing rib plates (78), and the top end surface of the plastic sleeve (74) contacts the bottom surface of the plug (73).

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