Highway subgrade stepped excavation supporting structure

Abstract

The utility model discloses a highway roadbed step type excavation support structure, including the protective net: the surface distribution of protective net has a plurality of base plate, the four corners of base plate left side all are provided with pre -buried subassembly, the right side welding of base plate has the locating seat, the right side of locating seat is provided with four ring -shaped distribution's locating rib, the surface of locating seat is provided with four ring -shaped distribution's arc -shaped clamping slot, locating rib is clamped in the inner chamber of arc -shaped clamping slot, the right side of locating seat is provided with screw head. The utility model discloses through the protective net to the slope face and carry out the protection, subsequently through the setting of pre -buried subassembly, provide the installation point position for base plate, subsequently in the cooperation use of locating seat and screw head, the end of locating rib is locked fixed, finally under the action of locating rib, further press -fitting positioning to protective net, finally in the surface spraying concrete layer of locating seat carries out the reinforcement, can reach the purpose that the restraint strength is big and the anchor point setting quantity is few.

Description

Technical Field

[0001] This utility model belongs to the field of highway subgrade technology, and in particular relates to a stepped excavation support structure for highway subgrade. Background Technology

[0002] In highway construction, stepped excavation of the roadbed is a common construction method, especially in areas with complex terrain, steep slopes, or poor geological conditions. The roadbed stepped excavation support structure requires a large number of support components such as anchor bolts for slope protection. The numerous anchor points may cause significant disturbance to the original soil structure, affecting the stability of the soil. Furthermore, the large number of anchor points increases the workload of maintenance and inspection during subsequent use. Therefore, it is necessary to provide a roadbed stepped excavation support structure that adopts a positioning reinforcement mesh distribution and compression method to enhance the support effect, while reducing the number of anchor points and improving the constraint strength. Utility Model Content

[0003] The purpose of this utility model is to provide a stepped excavation support structure for highway subgrade, which adopts a positioning reinforcement mesh distribution compression method to enhance the support effect, while reducing the number of anchor points and improving the constraint strength, so as to solve the above-mentioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a stepped excavation support structure for highway subgrade, including a protective net: multiple base plates are distributed on the surface of the protective net, and pre-embedded components are provided at the four corners on the left side of each base plate. A positioning seat is welded to the right side of the base plate, and four annularly distributed positioning ribs are provided on the right side of the positioning seat. Four annularly distributed arc-shaped grooves are opened on the surface of the positioning seat, and the positioning ribs are engaged in the inner cavity of the arc-shaped grooves. A threaded pressure head is provided on the right side of the positioning seat, and a threaded groove adapted to the threaded pressure head is opened on the right side of the positioning seat. The left side of the threaded pressure head is pressed against the surface of the positioning ribs. A concrete layer is sprayed onto the surface of the protective net, and the concrete layer also covers the surface of the positioning ribs.

[0005] Preferably, the pre-embedded component includes an anchor rod embedded in the slope, with a top plate welded to the right side of the anchor rod surface and a cone head welded to the left end of the anchor rod.

[0006] Preferably, four rectangular grooves arranged in a ring are provided on the left side of the anchor bolt surface, and anti-reverse clamps are rotatably connected to the inner cavity of the rectangular grooves.

[0007] Preferably, bolts are provided through the four corners on the right side of the substrate, the right end of the anchor rod has a screw hole, and the left end of the bolt passes through the substrate and is threaded into the inner cavity of the screw hole.

[0008] Preferably, a plurality of ring-shaped paddles are welded to the right side of the threaded pressure head.

[0009] The beneficial effects of this utility model are:

[0010] 1. This utility model protects the slope with a protective net, then provides installation points for the base plate through the setting of pre-embedded components, and then locks and fixes the ends of the positioning ribs with the cooperation of the positioning seat and the threaded pressure head. Finally, under the action of the positioning ribs, the protective net is further pressed and positioned. Finally, a concrete layer is sprayed on the surface of the positioning seat for reinforcement, thus achieving the purpose of high constraint strength and a small number of anchor points.

[0011] 2. This utility model, through the setting of pre-embedded components, in which the rectangular groove and the anti-reverse plate work together to prevent the anchor rod from going out, and at the same time, with the use of the anchor rod and the top plate, it provides a firm installation point for the base plate, thereby ensuring the stability of the base plate after installation.

[0012] 3. The present invention, through the setting of the pry bar, makes it convenient for the user to rotate the threaded pressure head by inserting a pry bar between two adjacent pry bars, thereby enhancing the pressing stability of the threaded pressure head on the positioning rib. Attached Figure Description

[0013] in:

[0014] Figure 1 This is a front cross-sectional view of one embodiment of the present invention;

[0015] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0016] Figure 3 This is a three-dimensional schematic diagram of a substrate, embedded component, positioning seat, and positioning rib according to an embodiment of the present invention;

[0017] Figure 4 This is an exploded perspective view of the substrate, positioning seat, and positioning rib in one embodiment of the present invention;

[0018] Figure 5 This is an exploded three-dimensional view of a pre-embedded component according to an embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Protective netting; 2. Base plate; 3. Embedded components; 31. Anchor bolt; 32. Top plate; 33. Conical head; 34. Rectangular groove; 35. Anti-reverse plate; 4. Positioning seat; 5. Positioning rib; 6. Arc-shaped groove; 7. Threaded pressure head; 8. Threaded groove; 9. Bolt; 10. Threaded hole; 11. Pulling block; 12. Concrete layer. Detailed Implementation

[0021] In the following description, embodiments of the stepped excavation support structure for highway subgrade according to the present invention will be described with reference to the accompanying drawings.

[0022] Figure 1-5 This invention illustrates an embodiment of a stepped excavation support structure for highway subgrade, comprising a protective net 1. Multiple base plates 2 are distributed on the surface of the protective net 1. Pre-embedded components 3 are installed at the four corners of the left side of each base plate 2. Each pre-embedded component 3 includes an anchor rod 31 embedded in the slope. A top plate 32 is welded to the right side of the anchor rod 31, and a conical head 33 is welded to the left end of the anchor rod 31. Four rectangular grooves 34 arranged in a ring are formed on the left side of the anchor rod 31. Anti-reverse clamps 35 are rotatably connected to the inner cavity of each rectangular groove 34. Through the pre-embedded components 3, the rectangular grooves 34 and the anti-reverse clamps 35 work together to prevent the anchor rods 31 from detaching. Simultaneously, the anchor rods 31 and the top plate 32 provide a secure installation point for the base plate 2, ensuring the stability of the base plate 2 after installation. A positioning seat 4 is welded to the right side of the base plate 2, and screws are threaded through the four corners of the right side of the base plate 2. The right end of the bolt 9 and anchor rod 31 has a screw hole 10. The left end of the bolt 9 passes through the base plate 2 and is threaded into the inner cavity of the screw hole 10. The right side of the positioning seat 4 has four annularly distributed positioning ribs 5. The surface of the positioning seat 4 has four annularly distributed arc-shaped grooves 6. The positioning ribs 5 are engaged in the inner cavity of the arc-shaped grooves 6. The right side of the positioning seat 4 has a threaded pressure head 7. The right side of the threaded pressure head 7 has multiple annularly distributed prying blocks 11 welded on it. The prying blocks 11 allow the user to rotate the threaded pressure head 7 by inserting a pry bar between two adjacent prying blocks 11, thereby enhancing the pressing stability of the threaded pressure head 7 on the positioning ribs 5. The right side of the positioning seat 4 has a threaded groove 8 that matches the threaded pressure head 7. The left side of the threaded pressure head 7 is pressed against the surface of the positioning ribs 5. The surface of the protective net 1 is sprayed with a concrete layer 12, which also covers the surface of the positioning ribs 5.

[0023] Working principle: When using this utility model, the user drives the anchor rod 31 into the slope. During the movement of the anchor rod 31, the anti-reverse plate 35 is blocked by the soil and retracts into the inner cavity of the rectangular groove 34. Once the anchor rod 31 exerts a force to the right, the end of the anti-reverse plate 35 opens due to the soil obstruction, thus preventing the anchor rod 31 from moving backward. Then, the user lays the protective net 1 on the slope and installs the base plate 2 on the surface of the top plate 32. The bolt 9 is drilled from the right side to the left side of the base plate 2 and threaded into the inner cavity of the bolt hole 10. At this time, the base plate 2 is installed and fixed. Then, the user positions the... The ribs 5 are laid out so that the positioning ribs 5 are pressed against the surface of the protective net 1, and the ends of the positioning ribs 5 are inserted into the inner cavity of the arc-shaped groove 6. Then, the user rotates the threaded pressure head 7, so that the threaded pressure head 7 is threaded into the inner cavity of the threaded groove 8 and pressed against the surface of the positioning ribs 5 to press and position the positioning ribs 5. During the locking process of the positioning ribs 5, the positioning ribs 5 can deform to a certain extent with the change of the slope to ensure that the protective net 1 can be effectively pressed. Finally, a concrete layer 12 is sprayed on the surface of the protective net 1 and the positioning ribs 5. After the concrete layer 12 is completely solidified, the slope support is completed.

[0024] In summary, this stepped excavation support structure for highway subgrade protects the slope with a protective net 1, then provides installation points for the base plate 2 through the installation of pre-embedded components 3, and then locks and fixes the ends of the positioning ribs 5 with the cooperation of the positioning seat 4 and the threaded pressure head 7. Finally, under the action of the positioning ribs 5, the protective net 1 is further pressed and positioned, and finally, a concrete layer 12 is sprayed on the surface of the positioning seat 4 for reinforcement, thus achieving the purpose of high constraint strength and a small number of anchor points.

Claims

1. A stepped excavation and support structure for highway subgrade, characterized in that, The protective net (1) includes a plurality of base plates (2) distributed on the surface of the protective net (1). Pre-embedded components (3) are provided at the four corners on the left side of the base plate (2). A positioning seat (4) is welded to the right side of the base plate (2). Four ring-shaped positioning ribs (5) are provided on the right side of the positioning seat (4). Four ring-shaped arc-shaped slots (6) are opened on the surface of the positioning seat (4). The positioning ribs (5) are engaged in the inner cavity of the arc-shaped slots (6). A threaded pressure head (7) is provided on the right side of the positioning seat (4). A threaded groove (8) adapted to the threaded pressure head (7) is opened on the right side of the positioning seat (4). The left side of the threaded pressure head (7) is pressed onto the surface of the positioning ribs (5). A concrete layer (12) is sprayed on the surface of the protective net (1). The concrete layer (12) also covers the surface of the positioning ribs (5).

2. The highway subgrade stepped excavation support structure according to claim 1, characterized in that, The pre-embedded component (3) includes an anchor rod (31) embedded in the soil slope. A top plate (32) is welded to the right side of the surface of the anchor rod (31), and a cone head (33) is welded to the left end of the anchor rod (31).

3. The stepped excavation and support structure for highway subgrade according to claim 2, characterized in that, The anchor rod (31) has four rectangular grooves (34) arranged in a ring on the left side, and the inner cavity of the rectangular grooves (34) is rotatably connected to a backstop plate (35).

4. The stepped excavation and support structure for highway subgrade according to claim 3, characterized in that, Bolts (9) are installed through the four corners on the right side of the substrate (2). The right end of the anchor rod (31) has a screw hole (10). The left end of the bolt (9) passes through the substrate (2) and is threaded into the inner cavity of the screw hole (10).

5. The stepped excavation and support structure for highway subgrade according to claim 4, characterized in that, The right side of the threaded pressure head (7) is welded with multiple ring-shaped paddles (11).

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