Mortise and tenon type prefabricated concrete member for reinforced earth retaining wall

Abstract

The utility model relates to a mortise and tenon type prefabricated concrete member for a reinforced earth retaining wall. In an existing reinforced retaining wall technology, a reverse wrapping surface layer can creep under earthwork filling loading, anchoring force provided by prefabricated L-shaped and Y-shaped concrete block surface layers is limited, and the slope ratio cannot be adjusted. The concrete component comprises an upper module body and a lower module body, a groove extending in the longitudinal direction is formed in the bottom face of the upper module body, a tenon extending in the longitudinal direction is arranged on the top face of the lower module body, the tenon is embedded into the groove, the bottom face of the upper module body is attached to the top face of the lower module body, and a nonlinear cavity is reserved between the groove and the tenon. A reinforced material is laid in the cavity, one end of the reinforced material forms an anchoring body in the cavity for positioning, and the other end of the reinforced material extends out of the concrete component and is located in the filler; a grouting hole is formed in the upper module body; the adjacent layers of concrete components are horizontally distributed in a staggered mode and arranged in a staggered mode. According to the concrete component, the anchoring effect of a reinforced material is facilitated, creeping is avoided, and the slope ratio can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of retaining wall prefabricated concrete components, in particular to a mortise and tenon type prefabricated concrete component for reinforced earth retaining walls. Background Art

[0002] Reinforced earth retaining walls are widely used in high fill slopes due to their high retaining height, good seismic performance, and low cost. They are particularly popular in areas such as civil engineering, highways, railways, and civil aviation, especially where fill heights exceed 15 meters and space is limited, making them the only retaining structure of choice. In existing engineering practices, reinforced earth retaining wall surface structures generally use reinforced earth encapsulated ecological surface layers, reinforced earth encapsulated surface layers + concrete surface panels, or prefabricated L- and Y-shaped structures. The encapsulated surface layer is anchored by the self-locking folding of the reinforcing material. However, the empirically determined length of the folded section can creep under earth fill loading (especially when the filler is clay), leading to overall deformation. Furthermore, the retaining wall as a whole is not as aesthetically pleasing as a prefabricated block surface layer. The commonly used prefabricated L-shaped and Y-shaped concrete block surface layers provide limited anchoring force and unclear force, which cannot achieve the effect in retaining wall design where the tensile strength failure of the reinforcement occurs before the reinforcement is anchored in the surface structure and pulled out and damaged (similar to the anchoring of steel bars in concrete). In addition, the slope that L-shaped and Y-shaped prefabricated panels can provide is generally a fixed slope and cannot be adjusted.

[0003] Therefore, there is an urgent need for a concrete component that can avoid creep of the reverse surface layer, ensure the anchoring effect of the wall panel and the reinforcement, and achieve different retaining wall slopes. Summary of the Invention

[0004] The purpose of the utility model is to provide a mortise and tenon type precast concrete component for reinforced earth retaining walls, so as to at least solve the problems in the existing reinforced earth retaining wall technology that the anti-wrapped surface layer will creep under the earth filling load, the anchoring force provided by the precast L-shaped and Y-shaped concrete block surface layer is limited, and the slope cannot be adjusted.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] A mortise and tenon-type precast concrete component for a reinforced earth retaining wall, the concrete component comprising an upper module body and a lower module body, the bottom surface of the upper module body being provided with a groove extending longitudinally, the top surface of the lower module body being provided with a tenon extending longitudinally, the tenon being embedded in the groove, and the bottom surface of the upper module body being in contact with the top surface of the lower module body, with a non-linear cavity reserved between the groove and the tenon;

[0007] A reinforcing material is laid in the cavity, one end of the reinforcing material forms an anchor body in the cavity for positioning, and the other end extends out of the concrete component and is located in the filler;

[0008] The upper module body is provided with a plurality of grouting holes;

[0009] The concrete components of adjacent layers are horizontally staggered and arranged with staggered joints.

[0010] Furthermore, the upper module body and the lower module body are fitted together to form a rectangular parallelepiped structure.

[0011] Furthermore, the cross section of the groove is trapezoidal.

[0012] Furthermore, the cross section of the tenon is trapezoidal.

[0013] Furthermore, the width of the notch of the groove is greater than the bottom width of the tenon.

[0014] Furthermore, the cavity is an inverted open U-shaped structure.

[0015] Furthermore, the reinforcement material is in a grid shape.

[0016] Furthermore, the sum of the height of the tenon and the height of the middle portion of the cavity is equal to the depth of the groove.

[0017] Furthermore, the plurality of grouting holes extend from the top surface of the upper module body to the bottom of the groove.

[0018] Furthermore, geotextiles are arranged between the staggered joints of the concrete components.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The utility model provides a mortise and tenon type precast concrete component for reinforced earth retaining wall. After being applied to the reinforced earth retaining wall, it can ensure the anchoring effect of the wall panel and the reinforcement material, and at the same time achieve different retaining wall slopes. The groove on the bottom surface of the upper module body of the concrete component and the tenon on the top surface of the lower module body form a mortise and tenon structure, and a non-linear cavity is reserved between the groove and the tenon, and the reinforcement material is folded back and anchored in the cavity. During the process of the reinforcement material being pulled out, on the one hand, the mesh of the reinforcement material is perpendicular to the pulling direction, and the reinforcement belt needs to cut the cement stone column to form a continuous shear surface. On the other hand, the retaining wall surface layer is formed by stacking concrete components layer by layer, and the retaining wall surface layer will clamp the reinforcement material itself, and the clamping surface is non-linear, which is more conducive to the anchoring effect of the reinforcement material, avoiding creep, and under the action of these two aspects, it can be ensured that the tensile strength failure of the reinforcement material occurs before the reinforcement material is anchored in the surface layer structure and is pulled out and destroyed.

[0021] 2. In the present invention, adjacent layers of concrete components are horizontally staggered, and the vertical staggered arrangement can form different slopes, which can be adjusted according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0023] Figure 1 It is a planar schematic diagram of the application of the utility model on a reinforced earth retaining wall;

[0024] Figure 2 It is along Figure 1 Schematic diagram of the wall layer direction;

[0025] Figure 3 It is a schematic diagram of the concrete component along the wall layer direction;

[0026] Figure 4 yes Figure 3 Middle AA section;

[0027] The symbols in the figure are:

[0028] 1-concrete component, 11-upper module body, 12-lower module body, 2-groove, 3-tenon, 4-cavity, 5-reinforcement material, 6-filler, 7-grouting hole, 8-geotextile. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] A mortise and tenon type precast concrete component for reinforced earth retaining walls, the concrete component 1 comprising an upper module body 11 and a lower module body 12, the bottom surface of the upper module body 11 being provided with a groove 2 extending longitudinally, the top surface of the lower module body 12 being provided with a tenon 3 extending longitudinally, the tenon 3 being embedded in the groove 2, and the bottom surface of the upper module body 11 being in contact with the top surface of the lower module body 12, a non-linear cavity 4 being reserved between the groove 2 and the tenon 3;

[0033] A reinforcement material 5 is laid in the cavity 4, one end of the reinforcement material 5 forms an anchor body in the cavity 4, and the other end extends out of the concrete component 1 and is located in the filler 6;

[0034] A plurality of grouting holes 7 are provided on the upper module body 11 to facilitate grouting into the cavity 4 .

[0035] The concrete components 1 of adjacent layers are horizontally staggered and arranged with staggered joints. The horizontal staggered distribution facilitates the formation of different slopes.

[0036] The upper module body 11 and the lower module body 12 are attached to form a cube structure or a rectangular parallelepiped structure.

[0037] The cross section of the groove 2 is trapezoidal.

[0038] The cross section of the tenon 3 is trapezoidal.

[0039] The width of the groove 2 is greater than the bottom width of the tenon 3 , so as to facilitate the formation of the cavity 4 .

[0040] The cavity 4 is an inverted open U-shaped structure, and the non-linear cavity 4 is more conducive to the anchoring effect of the reinforcement material 5.

[0041] The reinforcement material 5 is in a grid shape.

[0042] The sum of the height of the tenon 3 and the height of the middle of the cavity 4 is equal to the depth of the groove 2, so that the concrete component 1 forms a closed structure.

[0043] The plurality of grouting holes 7 are all penetrated from the top surface of the upper module body 11 to the bottom of the groove 2, so as to evenly distribute the injected cement mortar.

[0044] Geotextiles 8 are arranged between the staggered joints of the concrete components 1 to facilitate back-filtration and drainage.

[0045] Example:

[0046] like Figure 1 As shown, this embodiment provides a mortise and tenon type precast concrete component for reinforced earth retaining wall. The precast concrete component 1 uses convex tenon and concave mortise to anchor the reinforcing material 5, which can provide an anchoring effect similar to that of steel bars anchored in concrete, and can realize the adjustment of the slope of the retaining wall surface layer.

[0047] Specifically, if Figure 4 As shown, the concrete component 1 includes an upper module body 11 and a lower module body 12. The bottom surface of the upper module body 11 is provided with a groove 2 extending along the longitudinal direction, and the top surface of the lower module body 12 is provided with a tenon 3 extending along the longitudinal direction. The tenon 3 is embedded in the groove 2, and the bottom surface of the upper module body 11 is fitted with the top surface of the lower module body 12. In this embodiment, the upper module body 11 and the lower module body 12 are fitted to form a cube structure.

[0048] The cross section of the groove 2 is trapezoidal, and the cross section of the tenon 3 is trapezoidal.

[0049] The width of the groove 2 is greater than the bottom width of the tenon 3 , and the depth of the groove 2 is greater than the height of the tenon 3 , so that a non-linear cavity 4 is reserved between the groove 2 and the tenon 3 .

[0050] The cavity 4 is in an inverted open U-shaped structure, so that the reinforcing material 5 is folded back and anchored in the cavity 4 .

[0051] The sum of the height of the tenon 3 and the height of the middle of the cavity 4 is equal to the groove depth of the groove 2 .

[0052] In this embodiment, the upper module body 11 is a concave precast concrete component, and the lower module body 12 is an upward convex precast concrete component.

[0053] Further, such as Figure 3 As shown, two grouting holes 7 are provided on the upper module body 11. Both grouting holes 7 vertically penetrate from the top surface of the upper module body 11 to the bottom of the groove 2, so as to facilitate the rapid injection of cement mortar into the cavity 4 through the grouting holes 7 and make the cement mortar evenly dispersed.

[0054] like Figure 2 As shown, the concrete components 1 of adjacent layers are arranged in staggered joints, and the concrete components 1 of each layer are arranged in alignment. Geotextiles 8 are arranged between the staggered joints, and back-filtration and drainage are carried out through the geotextiles 8.

[0055] Adjacent layers of concrete components 1 are horizontally staggered and stacked to form a retaining wall surface layer. The upper and lower staggered arrangements form different slopes. The slope can be adjusted in the range of 1:0.5 to 1:0.01. The height of a single-stage retaining wall can be up to 8m or 10m. A platform is set in the middle of each level of the retaining wall. Various overall slopes of the fill slope can be achieved according to the width of the platform. There is no specific numerical limit on the slope.

[0056] Reinforcing material 5 is laid in the cavity 4. In this embodiment, the reinforcing material 5 is a geogrid. One end of the geogrid forms a folded anchor body in the cavity 4 for positioning, and the other end extends out of the concrete component 1 and is located in the filler 6. The reinforcing material 5 is laid between the upper module body 11 and the lower module body 12, and cement mortar is injected into the cavity 4 through the grouting holes 7 on the upper module body 11. After the cement mortar is solidified, the reinforcing material 5 is firmly anchored in the concrete component 1.

[0057] Preferably, the reinforcement material 5 is in a grid shape.

[0058] After grouting, the slurry fills the cavity 4 and forms square cement stone columns on each mesh of the reinforcing material 5. During the pulling process of the reinforcing material 5, on the one hand, the mesh of the reinforcing material 5 is perpendicular to the pulling direction, and the reinforcement strip needs to cut the cement stone column to form a continuous shear surface. On the other hand, the retaining wall surface layer is composed of concrete components 1 stacked layer by layer. The retaining wall surface layer will clamp the reinforcing material 5 itself, and the clamping surface is non-linear, which is more conducive to the anchoring effect of the reinforcing material 5. Under the action of these two aspects, it can be ensured that the tensile strength failure of the reinforcement material occurs before the reinforcement material is anchored in the surface structure and is pulled out and destroyed.

[0059] The construction process of this embodiment is as follows:

[0060] First, the upper module body 11 and the lower module body 12 of the concrete component 1 are prefabricated respectively. After the prefabrication is completed, the lower module body 12 is placed on the foundation or the lower concrete component 1, and the geogrid is laid. Then, the upper module body 11 is covered and cement mortar grouting is performed through the grouting holes 7. After reaching 50% age, earth filling is carried out. The adjacent layers of prefabricated concrete components 1 are horizontally staggered to meet the slope requirements. At the same time, the concrete components 1 are staggered, and geotextiles 8 are set between the staggered seams.

[0061] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A mortise and tenon type precast concrete component for reinforced earth retaining wall, characterized by: The concrete component (1) comprises an upper module body (11) and a lower module body (12); the bottom surface of the upper module body (11) is provided with a groove (2) extending in the longitudinal direction; the top surface of the lower module body (12) is provided with a tenon (3) extending in the longitudinal direction; the tenon (3) is embedded in the groove (2); the bottom surface of the upper module body (11) is in contact with the top surface of the lower module body (12); a non-linear cavity (4) is reserved between the groove (2) and the tenon (3); A reinforcing material (5) is laid in the cavity (4), one end of the reinforcing material (5) forms an anchor body in the cavity (4) for positioning, and the other end extends out of the concrete component (1) and is located in the filler (6); The upper module body (11) is provided with a plurality of grouting holes (7); The concrete components (1) in adjacent layers are horizontally staggered and arranged with staggered joints.

2. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The upper module body (11) and the lower module body (12) are fitted together to form a rectangular parallelepiped structure.

3. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The cross section of the groove (2) is trapezoidal.

4. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The cross section of the tenon (3) is trapezoidal.

5. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The notch width of the groove (2) is greater than the bottom width of the tenon (3).

6. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The cavity (4) is in an inverted open U-shaped structure.

7. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The reinforcement material (5) is in a grid shape.

8. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The sum of the height of the tenon (3) and the height of the middle of the cavity (4) is equal to the groove depth of the groove (2).

9. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: The plurality of grouting holes (7) all penetrate from the top surface of the upper module body (11) to the bottom of the groove (2).

10. The mortise and tenon type precast concrete component for reinforced earth retaining wall according to claim 1, characterized in that: Geotextiles (8) are arranged between the staggered joints of the concrete components (1).

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