Slot-type panel reinforced earth retaining wall

Abstract

The utility model discloses a kind of slot type panel reinforced soil retaining wall. Existing panel adopts single anchor structure, when temperature changes, hole wall is easy stress concentration, leading to cracking;And when local foundation occurs settlement difference, panel is easy to misplace and bulge out. The utility model includes panel, the foundation is set in the panel bottom, the capstone is set in the panel top;The panel includes multiple panel blocks, and cement mortar is smeared between panel blocks;The panel block is provided with a bolt hole, and the bolt hole is a waist round hole;Two anchor bars are set in the bolt hole, and gap is set between two anchor bars, to realize the connection between panel blocks;Reinforced body is set in embankment fill. The utility model can prevent panel structure cracking damage, and avoid misplacement between panel, keep panel structure stable.

Description

Technical Field

[0001] This utility model belongs to the field of roadbed retaining walls, specifically relating to a slot-type panel reinforced soil retaining wall. Background Technology

[0002] With the rapid development of infrastructure construction in my country, high embankment roadbed engineering is increasingly widely used in highways, railways, water conservancy and other fields. However, traditional retaining wall technology has revealed many limitations in actual engineering: gravity retaining walls require a large amount of materials and are costly; cantilever retaining walls are complex to construct and have a long construction period; and cast-in-place reinforced soil retaining walls have quality problems such as difficulty in vibration and insufficient drainage performance when constructed on high slopes.

[0003] The panels of existing gravity retaining walls are mostly constructed using precast concrete blocks. However, the existing panels use a single anchor bar structure, which makes the borehole walls prone to stress concentration and cracking when the temperature changes; and when there is differential settlement of the foundation, the panels are prone to misalignment and bulging. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a slotted panel reinforced soil retaining wall, which can prevent the panel structure from cracking and being damaged, avoid misalignment between panels, and maintain the stability of the panel structure.

[0005] A type of slotted panel reinforced soil retaining wall, specifically:

[0006] Includes a panel, with a base at the bottom and a capstone at the top;

[0007] The panel comprises multiple panel blocks, with cement mortar applied between the panel blocks; each panel block is provided with a pin hole, which is an oval hole; two anchor bars are installed in the pin holes, with a gap between the two anchor bars to achieve the connection between the panel blocks.

[0008] Reinforcing structures are installed within the roadbed fill.

[0009] Furthermore, the panel block includes type a panel block and type b panel block, each panel block having two through holes A and two blind holes B symmetrically arranged; the through holes A on the type a panel block are located on the outer side; the through holes A on the type b panel block are located on the inner side.

[0010] Furthermore, for low-fill areas with a height of ≤4m, the panel is provided with B-type panel blocks and A-type panel blocks at intervals from bottom to top; the bottom B-type panel blocks are connected to the foundation by anchor bars, which pass through through holes A; the B-type panel blocks are connected to the upper A-type panel blocks by anchor bars, which pass through blind holes B on the B-type panel blocks and through holes A on the A-type panel blocks.

[0011] Furthermore, for high fill areas with a height greater than 4m, the panel is formed by staggered assembly of type B panel blocks from bottom to top; the bottom type B panel blocks are connected to the foundation by anchor bars, which pass through through holes A; adjacent type B panel blocks are connected by anchor bars, which pass through blind holes B on the lower type B panel blocks and through holes A on the upper type B panel blocks.

[0012] Furthermore, a 2-3mm gap is set between the two anchor bars.

[0013] Furthermore, the panel block is equipped with lifting rings.

[0014] Furthermore, the reinforced body includes a structural grid and a load-bearing grid; one end of the structural grid is embedded in the cement mortar between adjacent panel blocks and the other end is buried in the roadbed fill; one end of the load-bearing grid is provided with an arc-shaped wrap-around grid.

[0015] Furthermore, a composite drainage pad is provided on the back of the panel.

[0016] Furthermore, a railing is installed on the outside of the cap stone.

[0017] The beneficial effects of this utility model are:

[0018] 1) The pin hole of this utility model adopts an oblong hole with a reserved gap of 2-3mm. When the ambient temperature changes, the double anchor bars are allowed to move slightly along the long axis of the hole. When the panel expands and contracts freely, the anchor bars slide to release more than 90% of the temperature stress, avoiding structural damage. The parallel constraint of the double anchor bars still maintains the overall alignment of the panel. When the foundation experiences differential settlement, the double anchor bars generate a slight inclination angle in the oblong hole to coordinate the differential settlement of the upper and lower panels. After the settlement stabilizes, the elastic restoring force of the steel bars forces the panel to automatically reset, maintaining coordinated load bearing. At the same time, the two steel bars form a torque, converting the torsional force into shear force. The torsional resistance is increased by 3 times, eliminating panel misalignment.

[0019] 2) The panel block of this utility model is provided with through holes A and blind holes B to form a force transmission system of "B hole bearing pressure → anchor bar force transmission → A hole shear resistance", which constitutes a rigid force transmission skeleton. Based on the A and B holes of the upper and lower panels, a three-dimensional spatial grid system is constructed to enhance the adaptability of the structure to terrain limitations such as straight / curved roads (R≥30m), slope changes and culvert connections.

[0020] 3) The grid structure of this utility model is arranged in the middle of the panel to provide overall stability, while the main reinforcing bars are set in the entire cross section and the connection reliability is enhanced by the unique structure of overlapping in the middle and wrapping at the ends; and it forms a composite gravity structure with the coarse-particle fill through frictional interlocking, which significantly improves the overall tensile strength and effectively prevents the risk of structural failure caused by the breakage of the reinforcing bars. Attached Figure Description

[0021] Figure 1This is the cross-section of the pin-type panel reinforced soil retaining wall of this utility model;

[0022] Figure 2 This is a schematic diagram of the grid laying in the pin-type panel reinforced soil retaining wall of this utility model;

[0023] Figure 3 This is a schematic diagram of the panel in the pin-type panel reinforced soil retaining wall of this utility model;

[0024] Figure 4 This is a schematic diagram of the panel alignment structure in the pin-type panel reinforced soil retaining wall of this utility model;

[0025] Figure 5 This is a schematic diagram of the staggered arrangement of panels in the pin-type panel reinforced soil retaining wall of this utility model;

[0026] In the diagram, 1. capstone, 2. panel, 3. foundation, 6. pin hole, 7. lifting ring, 8. structural grid, 9. load-bearing grid, 10. anchor bar, 11. composite drainage pad, 12. railing. Detailed Implementation

[0027] The present invention will now be described in detail with reference to specific embodiments.

[0028] This utility model provides a pin-type panel reinforced soil retaining wall, which can prevent the panel structure from cracking and being damaged, avoid misalignment between panels, maintain the stability of the panel structure, and achieve rapid assembly and construction.

[0029] like Figure 1 As shown, the pin-type panel reinforced soil retaining wall of this utility model includes a panel 2, a foundation 3 at the bottom of the panel 2, a cap stone 1 at the top of the panel 2; a composite drainage pad 11 is provided on the back of the panel 2 to facilitate drainage; and a railing 12 is provided on the outside of the cap stone 1.

[0030] Panel 2 adopts a modular design, consisting of multiple panel blocks, with cement mortar applied between the panels; such as Figure 3 As shown, the panel blocks include type a panel blocks and type b panel blocks. Each panel block has two through holes A and two blind holes B symmetrically arranged. The through holes A on the type a panel blocks are located on the outer side; the through holes A on the type b panel blocks are located on the inner side. A lifting ring 7 is provided on the panel blocks.

[0031] The specific arrangement of the panel blocks should be selected based on the load conditions. For example... Figure 4 , 5As shown, for low-fill areas with a height ≤ 4m, an aligned arrangement is adopted, with holes arranged vertically in rows; panel 2 is equipped with B-type panel blocks and A-type panel blocks at intervals from bottom to top; the bottom B-type panel blocks are connected to the foundation 3 by anchor bars 10, which pass through through holes A; the B-type panel blocks are connected to the upper A-type panel blocks by anchor bars 10, which pass through blind holes B on the B-type panel blocks and through holes A on the A-type panel blocks. The specific construction process is as follows: accurately place the upper A-type through holes on the lower panel directly above the B-type blind holes of the lower panel, and insert two Φ16 anchor bars. The lower end of the anchor bar is inserted into the bottom of the lower layer B hole to bear pressure, and the upper end passes through the upper layer A hole for anchoring, forming a force transmission system of "B hole bearing pressure → anchor bar force transmission → A hole shear resistance", which constitutes a rigid force transmission skeleton. Based on the A and B holes of the upper and lower panels, a three-dimensional spatial grid system is constructed to enhance the structure's adaptability to terrain limitations such as straight lines / curves (R≥30m), slope changes and culvert connections; the masonry is completed by repeating this process.

[0032] For high embankment areas with a height greater than 4m, staggered arrangement is adopted, with adjacent rows of holes horizontally staggered; panel 2 is formed by staggered assembly of type b panel blocks from bottom to top; the bottom type b panel blocks are connected to the foundation 3 by anchor bars 10, which pass through through holes A; adjacent type b panel blocks are connected by anchor bars 10, which pass through blind holes B on the lower type b panel blocks and through holes A on the upper type b panel blocks.

[0033] The panel blocks are provided with pin holes 6, which are oval holes consisting of two parallel straight sides and two semi-circular ends. The diameters of the two semi-circles are the same, and the diameters of the semi-circles are adapted to the diameters of the anchor bars. Two anchor bars 10 are installed inside the pin holes 6, with a gap between them to connect the panel blocks. The gap between the two anchor bars 10 is 2-3mm. This utility model provides a 2-3mm gap in the oval holes, allowing the double anchor bars to move slightly along the long axis of the hole when the ambient temperature changes. When the panel expands and contracts freely, the anchor bars slide to release more than 90% of the temperature stress, avoiding structural damage. The parallel constraint of the double anchor bars still maintains the overall alignment of the panel. When differential settlement occurs in the foundation, the double anchor bars generate a slight tilt angle in the oval holes, coordinating the differential settlement between the upper and lower panels. After the settlement stabilizes, the elastic restoring force of the steel bars forces the panel to automatically reset, maintaining coordinated load-bearing. At the same time, the two steel bars form a torque, converting the torsional force into shear force; the torsional resistance is increased by 3 times, preventing panel misalignment.

[0034] Regarding node reinforcement measures, spiral stirrups are installed around the pin holes to prevent localized crushing of the concrete. All exposed metal parts, including the pin reinforcement and embedded lifting rings, undergo double rust prevention treatment. The lifting rings are made of Φ16 steel bars embedded in the middle of the back of the panel, which meets the hoisting requirements without affecting the structural aesthetics. The wall breast slope is designed as a steep slope of 1:0.05, which maximizes land conservation while ensuring stability and is suitable for retaining wall projects of 2-9m.

[0035] like Figure 2 As shown, reinforcement structures are installed within the roadbed fill, including structural geogrids 8 and load-bearing geogrids 9. The reinforcement system employs a high-performance geogrid layered arrangement technology, scientifically classifying the reinforcement materials into load-bearing and structural geogrids based on their engineering function. The load-bearing geogrids are high-strength geogrids with a longitudinal tensile strength ≥160kN / m and a nominal elongation ≤11.5%. A variable length design is adopted based on differences in wall height: when the wall height is greater than 5m, the upper 16 layers use 15m long geogrids, and the lower layers use 12m long geogrids; when the wall height is less than 5m, a uniform 12m long geogrid is used. This differentiated design ensures both economy and meets the load-bearing requirements of different parts. As an auxiliary reinforcement, the structural grid is uniformly 4.0m long in this embodiment. One end is embedded in the 10mm thick M35 cement mortar layer between adjacent panels, and the other end is buried in the roadbed fill, forming a double anchoring mechanism. A 2.5m long arc transition section is set at one end of the load-bearing grid to effectively improve stress distribution. Each layer of grid is fixed with square-headed U-shaped nails made of Φ10 steel bars, with a size of 10×3cm. They are staggered every 2-3m along the longitudinal direction to ensure that the reinforcement material maintains the designed position and tension state during construction.

[0036] During construction, the foundation work employs a segmented, skip-section process, with each segment controlled to be 2-4 meters in length. Foundation treatment includes cleaning, leveling, bearing capacity testing, and drainage measures. Manual cleaning is used 30 cm from the bottom of the pit to prevent over-excavation and ground disturbance. Precisely embedded connecting steel bars are placed on the top surface of the foundation, with positional errors controlled within ±5 mm, laying the foundation for the installation of the superstructure. Panel installation adheres to a "three-control" standard: controlling verticality (deviation ≤1% of wall height), controlling flatness (height difference between adjacent panels ≤5 mm), and controlling joint width (10 mm ± 2 mm). A special guide tool is used for pin connections to ensure smooth insertion of the anchor bars without damaging the hole walls. Cap stones are prefabricated in segments (2-4 meters / segment), with embedded U-bolts for installing guardrails, ensuring safety and facilitating future maintenance.

[0037] The dynamic monitoring system includes displacement observation during construction and long-term monitoring after construction. Inclinometers and settlement observation points are set up for high retaining walls (>5m), and an early warning mechanism is activated when data is abnormal. The quality acceptance implements a "three-inspection system", focusing on checking the reliability of the pin connection, the unobstructed drainage holes and the integrity of the filter layer.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A slot-type panel reinforced soil retaining wall, characterized in that: Includes a panel (2), with a base (3) at the bottom of the panel (2) and a cap stone (1) at the top of the panel (2); The panel (2) includes multiple panel blocks, and cement mortar is applied between the panel blocks; the panel blocks are provided with pin holes (6), and the pin holes (6) are oval holes; two anchor bars (10) are provided in the pin holes (6), and a gap is provided between the two anchor bars (10) to realize the connection between the panel blocks. Reinforcing structures are installed within the roadbed fill.

2. The slot-type panel reinforced soil retaining wall according to claim 1, characterized in that: The panel blocks include type a panel blocks and type b panel blocks. Each panel block has two through holes A and two blind holes B symmetrically arranged. The through holes A on the type a panel block are located on the outer side, while the through holes A on the type b panel block are located on the inner side.

3. A slot-type panel reinforced soil retaining wall according to claim 2, characterized in that: For low fill areas with a height of ≤4m, the panel (2) is provided with b-type panel blocks and a-type panel blocks at intervals from bottom to top; the bottom b-type panel blocks are connected to the foundation (3) by anchor bars (10), and the anchor bars (10) pass through the through hole A; the b-type panel blocks are connected to the upper a-type panel blocks by anchor bars (10), and the anchor bars (10) pass through the blind hole B on the b-type panel blocks and the through hole A on the a-type panel blocks.

4. A slot-type panel reinforced soil retaining wall according to claim 2, characterized in that: For high embankment areas with a height of >4m, the panel (2) is formed by staggered assembly of type b panel blocks from bottom to top; the bottom type b panel block is connected to the foundation (3) by anchor bars (10), and the anchor bars (10) pass through the through hole A; the adjacent type b panel blocks are connected by anchor bars (10), and the anchor bars (10) pass through the blind hole B on the lower type b panel block and the through hole A on the upper type b panel block.

5. A slot-type panel reinforced soil retaining wall according to any one of claims 3 or 4, characterized in that: A 2-3mm gap is set between the two anchor bars (10).

6. A slot-type panel reinforced soil retaining wall according to claim 5, characterized in that: The panel block is equipped with a lifting ring (7).

7. A slot-type panel reinforced soil retaining wall according to claim 6, characterized in that: The reinforced body includes a structural grid (8) and a load-bearing grid (9); one end of the structural grid (8) is embedded in the cement mortar between adjacent panel blocks and the other end is buried in the roadbed fill; one end of the load-bearing grid (9) is provided with an arc-shaped wrap-around grid.

8. A slot-type panel reinforced soil retaining wall according to claim 7, characterized in that: A composite drainage pad (11) is provided on the back of the panel (2).

9. A slot-type panel reinforced soil retaining wall according to claim 8, characterized in that: A railing (12) is provided on the outside of the cap stone (1).

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