Adjustable reinforced earth retaining wall repair device and construction method

Abstract

The invention discloses an adjustable reinforced earth retaining wall repair device and construction method, which comprises adding a clamp and a stretching mechanism between a reinforcement belt and a panel, the clamp comprising a first clamping plate and a second clamping plate, both of which are provided with hanging holes, the stretching mechanism comprising a main body, one end of which is open, and the other end of which is provided with a baffle, the baffle being provided with a first through hole coaxial with the main body, two pads matching with the inner cavity of the main body being provided in the main body, the two pads being provided with second through holes coaxial with the main body, and an elastic member being provided between the two pads; a connecting rod, which is inserted into the first through hole and the second through hole along the axis of the main body and matches with the two through holes, and its two ends respectively extend out of the main body, a hook connected to the hanging hole is provided at the end of the connecting rod close to the baffle, and an external thread section is provided at the end away from the baffle, and a nut screwed together is provided on the external thread section; this scheme improves the firmness of the reinforcement belt connection, and has the characteristics of rapid construction, low cost and strong earthquake resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of reinforced soil, and in particular relates to an adjustable reinforced soil retaining wall device and a construction method. Background Art

[0002] Reinforced earth retaining wall is a relatively new type of retaining structure. It is to add reinforcement belts to the soil and use the friction between the reinforcement belts and the soil to improve the deformation conditions of the soil and improve the engineering properties of the soil, so as to achieve the purpose of stabilizing the soil. Reinforced earth retaining wall consists of three parts: filler, reinforcement belts arranged in the filler, and wall panels. It is generally used in relatively flat and spacious fill sections. It is generally not suitable for use in excavation sections or steep slopes because it is not conducive to the arrangement of reinforcement.

[0003] Compared with traditional gravity retaining walls, reinforced earth retaining walls have the characteristics of large allowable settlement, fast construction, low cost, land saving, and small amount of earth and stone. This is also an important reason why it is widely used in highway and railway construction. In recent years, reinforced earth retaining wall accidents have occurred frequently. The cause of the accident is mostly the damage of the connection between the panel and the reinforcement belt, which causes the panel to carry part of the filler to collapse, causing danger to vehicles and pedestrians on the road, making the development of reinforced earth retaining walls questionable. The current repair method of reinforced earth retaining walls still has the problem that the connection between the panel and the reinforcement belt is easy to be damaged after repair. Therefore, there is an urgent need for a reinforced earth retaining wall repair device to solve the problems of insufficient firmness of the connection between the reinforcement belt and the panel, easy breakage of the reinforcement belt at the inner edge of the panel, inability to adjust the tension of the reinforcement belt, and greater impact by earthquakes. It has important engineering significance and practical value. Summary of the invention

[0004] In view of the above-mentioned technical problems, the present invention provides an adjustable reinforced earth retaining wall repair device and a construction method.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An adjustable reinforced earth retaining wall repair device comprises mutually detachable clamps for clamping reinforcement belts, a stretching mechanism for adjusting the tightness of the reinforcement belts, and a panel for supporting the stretching mechanism;

[0007] The clamp comprises a first clamping plate and a second clamping plate which are detachably connected, and both the first clamping plate and the second clamping plate are provided with hanging holes;

[0008] The stretching mechanism comprises a body, which is a hollow cylinder, one end of which is open, and the other end is provided with a baffle, a first through hole coaxial with the body is provided on the baffle, two pads matching with the inner cavity of the body are provided in the body, the two pads are provided with second through holes coaxial with the body, and an elastic member is provided between the two pads; a connecting rod, which penetrates along the axis of the body and matches with the first through hole and the second through hole, and the two ends of the connecting rod extend out of the body respectively, a hook connected to the hanging hole is provided at the end of the connecting rod close to the baffle, and an external thread section is provided at the end away from the baffle, and a nut screwed together is provided on the external thread section;

[0009] The panel is composed of panel units spliced ​​together, and the panel unit is a rectangular parallelepiped, wherein two perpendicular sides of the panel unit are provided with protrusions, and the other two perpendicular sides of the panel unit are provided with grooves that can be embedded with the protrusions, and a third through hole that fits the connecting rod is provided in the center of the panel unit.

[0010] Furthermore, in the above-mentioned adjustable reinforced earth retaining wall repairing device, flanges are provided on both the first clamping plate and the second clamping plate, and the flanges of the two clamping plates are engaged with each other after being aligned.

[0011] Furthermore, in the above-mentioned adjustable reinforced earth retaining wall repair device, at least two screw holes are provided on the first clamping plate and the second clamping plate, and the two are connected by bolts after being matched.

[0012] Furthermore, in the above-mentioned adjustable reinforced earth retaining wall repair device, the main body is provided with an observation window connected to the inner cavity of the main body along the axial direction of the main body from the end away from the baffle, and the outside of the observation window is provided with transparent plastic, and the edge of the observation window is marked with scales.

[0013] Furthermore, in the above-mentioned adjustable reinforced earth retaining wall repairing device, the first through hole and the second through hole have the same aperture, and the third through hole has a larger aperture than the first through hole and the second through hole.

[0014] A construction method for an adjustable reinforced earth retaining wall repair device, characterized in that it comprises the following construction steps:

[0015] (1) Cleaning the working surface: Use a combination of mechanical and manual methods to clean the damaged retaining wall, level the damaged slope of the retaining wall, expose the intact reinforcement belt part to the slope surface, and cut off the damaged part of the reinforcement belt;

[0016] (2) Prefabricated equipment:

[0017] {1} Prefabricated fixture: According to the engineering design requirements, determine the model and size of the plates used for the first and second clamps, open corresponding screw holes at the four corners of the first and second clamps, open a hanging hole at one end that can be connected to a hook, and set a flange in the middle;

[0018] {2} Prefabricated stretching mechanism: According to the engineering design requirements, determine the model and size of the plates used for the pads and baffles, determine the length of the long connecting rod according to the distance between the slope and the panel, and prefabricate the body, elastic parts and nuts according to the design;

[0019] {3} Prefabricated panel: The panel unit is prefabricated with reinforced concrete. Protrusions are set on two mutually perpendicular sides of the panel unit, and grooves are set on the other two mutually perpendicular sides. During assembly, the protrusions and grooves between adjacent panel units are embedded in each other;

[0020] (3) Assembling the stretching mechanism: the external thread section of the connecting rod is placed along the axis of the body so as to pass through the first through hole, the second through hole and the center of the spiral line of the elastic member in sequence, and finally the external thread section of the connecting rod is fixed by a nut to assemble the stretching mechanism;

[0021] (4) Prepare cement mortar and high-graded sandy soil filler according to the engineering design requirements;

[0022] (5) Lay a 2-3 cm layer of cement mortar on the base surface, and follow the construction sequence of low-to-high construction in layers and sections. Apply cement mortar on the contact surfaces between panel units, fit the protrusions into the grooves, and lay the panels in staggered joints.

[0023] (6) Backfill the wall. After a section of the retaining wall panel is built, stretch the reinforcement strip on the pre-prepared backfill base surface. The backfill base surface and the reinforcement strip surface are at the same height. Stretch the reinforcement strip and fix it on the panel using a stretching mechanism;

[0024] (7) Layered compaction: The backfill of the wall should be built synchronously with the main body of the roadbed and in layers. Heavy machinery is prohibited from rolling within 1.0m of the panel and at the corners. It is advisable to use light machinery such as a roller of less than 5t or a vibratory rammer for compaction;

[0025] (8) Construct the masonry panels according to steps (5), (6) and (7), fill the back of the wall with soil, and compact it layer by layer until all construction is completed;

[0026] (9) After the construction is completed, adjust the nuts so that the force on the reinforcement band is within the specified limit.

[0027] The beneficial effects of the embodiments of the present invention are:

[0028] 1. The reinforcement belt and the panel are connected by a stretching mechanism. The clamp of the stretching mechanism clamps the reinforcement belt, which improves the firmness of the reinforcement belt connection. The connecting rod is supported on the panel, and the body and the baffle are placed outside the panel. The nut on the external thread section of the connecting rod can be used to adjust the tension of the reinforcement belt, thereby improving the repair effect of the reinforced earth retaining wall;

[0029] 2. The use of the reinforced earth retaining wall repair device to repair the retaining wall has the characteristics of rapid construction, low cost and strong earthquake resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a construction and repair schematic diagram of the adjustable reinforced earth retaining wall repair device of the present invention;

[0031] Figure 2 It is an axonometric view of the adjustable reinforced earth retaining wall repairing device of the present invention;

[0032] Figure 3 is a three-dimensional diagram of a baffle unit;

[0033] Figure 4 for Figure 2 Exploded view of;

[0034] Figure 5 is a three-dimensional image of the panel;

[0035] Figure 6 is a top view of the fixture;

[0036] Figure 7 It is the left view of the fixture;

[0037] Figure 8 It is a three-dimensional diagram of the body of Example 3;

[0038] Fig. 9 This is the front view of the stretching mechanism of Example 3.

[0039] The figure marks in the drawings of the specification include: first clamping plate 1, second clamping plate 2, hanging hole 101, flange 102, screw hole 103, main body 3, observation window 30, baffle 4, first through hole 40, pad 5, second through hole 50, elastic member 6, connecting rod 7, hook 70, external thread section 71, nut 72, panel 8, panel unit 80, protrusion 801, groove 802, third through hole 803, bolt 9, and rib band 10. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Example 1

[0042] like Figures 1 to 7As shown, the present invention provides an adjustable reinforced earth retaining wall repair device, comprising a clamp for clamping a reinforcing belt 10 that can be detachably assembled with each other, a stretching mechanism for adjusting the tightness of the reinforcing belt 10, and a panel 8 for supporting the stretching mechanism; wherein the clamp comprises a first clamping plate 1 and a second clamping plate 2 that can be detachably connected, and specifically, four screw holes 103 are provided on the first clamping plate 1 and the second clamping plate 2, and the two clamp the reinforcing belt 10 when they are aligned, and then the first clamping plate 1 and the second clamping plate 2 are connected by bolts 9, and the first clamping plate 1 and the second clamping plate 2 are provided with hanging holes 101;

[0043] like Figure 2 and Figure 4 As shown, the stretching mechanism includes a body 3, which is a hollow cylinder, one end of which is open, and the other end is provided with a baffle 4, a first through hole 40 coaxial with the body 3 is provided on the baffle 4, two pads 5 matching with the inner cavity of the body 3 are provided in the body 3, the two pads 5 are provided with a second through hole 50 coaxial with the body 3, and an elastic member 6 is provided between the two pads 5; a connecting rod 7, which penetrates along the axis of the body 3 and matches with the first through hole 40 and the second through hole 50, and the two ends of the connecting rod 7 extend out of the body 3 respectively, a hook 70 connected to the hanging hole 101 is provided at the end of the connecting rod 7 close to the baffle 4, and an external thread section 71 is provided at the end away from the baffle 4, and a nut 72 screwed together is provided on the external thread section 71;

[0044] like Figure 3 and Figure 5 As shown, the panel 8 is composed of panel units 80, and the panel unit 80 is a rectangular parallelepiped, wherein two perpendicular side surfaces of the panel unit 80 are provided with protrusions 801, and the other two perpendicular side surfaces of the panel unit 80 are provided with grooves 802 that can be engaged with the protrusions 801, and a third through hole 803 that fits with the connecting rod 7 is provided at the center of the panel unit 80, wherein the apertures of the first through hole 40 and the second through hole 50 are equal, and the aperture of the third through hole 803 is larger than the apertures of the first through hole 40 and the second through hole 50.

[0045] The construction method for repairing a damaged reinforced earth retaining wall using the reinforced earth retaining wall repair device specifically comprises the following steps:

[0046] (1) Cleaning the working surface: Use a combination of mechanical and manual methods to clean the damaged original retaining wall, level the damaged slope of the retaining wall, expose the intact reinforcement belt 10 to the slope surface, and cut off the damaged part of the reinforcement belt 10;

[0047] (2) Prefabricated equipment:

[0048] {1} Prefabricated fixture: According to the engineering design requirements, determine the model and size of the plates used for the first clamping plate 1 and the second clamping plate 2, open four corresponding screw holes 103 at the four corners of the first clamping plate 1 and the second clamping plate 2, and open a hanging hole 101 at one end that can be connected to the hook 70;

[0049] {2} Prefabricated stretching mechanism: According to the engineering design requirements, determine the type and size of the plates used for the pad 5 and the baffle 4, determine the length of the long connecting rod 7 according to the distance between the slope and the panel 8, and prefabricate the body 3, the elastic member 6 and the nut 72 according to the engineering design;

[0050] {3} Prefabricated panel 8: The panel unit 80 is prefabricated with reinforced concrete. Two mutually perpendicular side surfaces of the panel unit 80 are provided with protrusions 801, and the other two mutually perpendicular side surfaces are provided with grooves 802. When assembling, the protrusions 801 and grooves 802 between adjacent panel units 80 are interlocked with each other;

[0051] (3) Assembling the stretching mechanism: the external thread section 71 of the connecting rod 7 is inserted along the axis of the body 3 and passes through the first through hole 40, the second through hole 50 and the center of the spiral line of the elastic member 6 in sequence, and finally the external thread section 71 of the connecting rod 7 is fixed by the nut 72 to assemble the stretching mechanism;

[0052] (4) Prepare cement mortar and high-graded sandy soil filler according to the engineering design requirements;

[0053] (5) Laying the panel 8, applying a 2-3 cm layer of cement mortar on the base surface, following the construction sequence of low-level first and high-level later, the contact surfaces between the panel units 80 are coated with cement mortar, and then the protrusions 801 and the grooves 802 are engaged, as shown in FIG. Figure 5 As shown, staggered paving;

[0054] (6) Backfilling the wall. After the retaining wall panel 8 is built for a section, the reinforcement belt 10 is stretched on the pre-prepared backfill base surface. The backfill base surface and the reinforcement belt 10 are at the same height. The reinforcement belt 10 is stretched by a stretching mechanism and the connecting rod 7 of the stretching mechanism is supported on the panel 8. The baffle 4 forms a limit for the stretching mechanism;

[0055] (7) Layered compaction: The backfill of the wall should be built synchronously with the main body of the roadbed and in layers. Heavy machinery is prohibited from rolling within 81.0m from the panel and at the corners. It is advisable to use light machinery such as a roller of less than 5t or a vibratory rammer for compaction;

[0056] (8) According to steps (5), (6) and (7), masonry panels 8 are constructed, soil is filled behind the wall, and the soil is compacted layer by layer until all construction is completed;

[0057] (9) After the construction is completed, adjust the long nut 72 so that the force on the reinforcement band 10 is within the specified limit.

[0058] In this solution, a stretching mechanism is added between the reinforcement belt 10 and the panel 8. The clamp of the stretching mechanism clamps the damaged reinforcement belt 10. The use of the stretching mechanism to connect the reinforcement belt 10 improves the firmness of the connection of the reinforcement belt 10. When the stretching mechanism is installed, the connecting rod 7 is supported on the panel 8, and the main body 3 and the baffle 4 are placed outside the panel 8, so that the tension on the reinforcement belt 10 can be adjusted by using the nut 72 on the external threaded section 71 of the connecting rod 7. The length of the connecting rod 7 can be determined according to the damage range on site, and the elastic member 6 reduces the impact of earthquakes on the reinforced earth retaining wall to a certain extent. Improved the repair effect of the reinforced earth retaining wall The panel 8 is provided with a protrusion 801 and a groove 802, so that the connection between the panels 8 is tighter and the integrity of the panel 8 is improved; using the reinforced earth retaining wall repair device to repair the retaining wall has the advantages of rapid construction, low cost and strong earthquake resistance.

[0059] Example 2

[0060] like Figure 4 and Figure 7 As shown, compared with Example 1, the difference is that both the first splint 1 and the second splint 2 are provided with flanges 102, and the flanges 102 of the two are engaged with each other after being matched, and the first splint 1 and the second splint 2 are matched to clamp the tendon 10, and the provided flanges 102 increase the contact area between the first splint 1 and the second splint 2 and the tendon 10, effectively improving the connection strength between the tendon 10 and the clamp, and preventing the clamp and the tendon 10 from separating.

[0061] Example 3

[0062] like Figure 8 and Fig. 9 As shown, compared with Example 2, the difference is that an observation window 30 connected to the inner cavity of the main body 3 is opened along the axial direction of the main body 3 from the end away from the baffle 4, and a transparent plastic is provided on the outside of the observation window 30. The edge of the observation window 30 is marked with a scale. The operator can timely know the length of the adjustment nut 72 screwed into the inner cavity of the main body 3 through the scale on the edge of the observation window 30. The stress condition of the reinforcement belt 10 can be detected at any time according to the scale displayed on the observation window 30. The tension of the reinforcement belt 10 can be adjusted in time by adjusting the nut 72 to ensure that the stress on the connecting end of the retaining wall and the reinforcement belt 10 is approximately consistent, further reducing the possibility of damage to the reinforcement belt 10, and the stress distribution diagram of the reinforcement belt 10 of the entire reinforced earth retaining wall can also be constructed based on this.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable reinforced earth retaining wall repair device, comprising a clamp for clamping a reinforcement belt (10) which can be detachably assembled from each other, a stretching mechanism for adjusting the tightness of the reinforcement belt (10), and a panel (8) for supporting the stretching mechanism; characterized in that: The clamp comprises a first clamping plate (1) and a second clamping plate (2) which are detachably connected, and both the first clamping plate (1) and the second clamping plate (2) are provided with hanging holes (101); The stretching mechanism comprises a body (3) which is a hollow cylinder, one end of which is open and the other end of which is provided with a baffle (4), a first through hole (40) coaxial with the body (3) being provided on the baffle (4), two pads (5) matching with the inner cavity of the body (3) being provided in the body (3), the two pads (5) being provided with second through holes (50) coaxial with the body (3), and an elastic member (6) being provided between the two pads (5); a connecting rod (7) which penetrates along the axis of the body (3) and matches with the first through hole (40) and the second through hole (50), and the two ends of which extend out of the body (3), respectively; a hook (70) connected to the hanging hole (101) being provided at the end of the connecting rod (7) close to the baffle (4), and an external thread section (71) being provided at the end away from the baffle (4), and a nut (72) being screwed on the external thread section (71); The panel (8) is formed by splicing panel units (80), wherein the panel unit (80) is a rectangular parallelepiped, wherein two perpendicular side surfaces of the panel unit (80) are provided with protrusions (801), and the other two perpendicular side surfaces of the panel unit (80) are provided with grooves (802) that can be engaged with the protrusions (801), and a third through hole (803) that fits the connecting rod (7) is provided at the center of the panel unit (80).

2. The adjustable reinforced earth retaining wall repair device according to claim 1 is characterized in that: The first clamping plate (1) and the second clamping plate (2) are both provided with flanges (102), and the flanges (102) of the two clamping plates are engaged with each other after being matched.

3. The adjustable reinforced earth retaining wall repair device according to claim 2 is characterized in that: At least two screw holes (103) are provided on each of the first clamping plate (1) and the second clamping plate (2), and the two are connected by bolts (9) after being aligned.

4. The adjustable reinforced earth retaining wall repair device according to claim 3 is characterized in that: The body (3) is provided with an observation window (30) in communication with the inner cavity of the body (3) along the axial direction of the body (3) from the end away from the baffle (4). The outside of the observation window (30) is provided with transparent plastic, and the edge of the observation window (30) is marked with scale.

5. The adjustable reinforced earth retaining wall repair device according to claim 4 is characterized in that: The first through hole (40) and the second through hole (50) have the same aperture, and the third through hole (803) has a larger aperture than the first through hole (40) and the second through hole (50).

6. The construction method of the adjustable reinforced earth retaining wall repair device according to any one of claims 1 to 5, characterized in that: The construction steps include: a. Cleaning the working surface: Use a combination of mechanical and manual methods to clean the damaged original retaining wall, level the damaged slope of the retaining wall, expose the intact reinforcement belt (10) on the slope, and cut off the damaged part of the reinforcement belt (10); b. Prefabricated appliances: {1} Prefabricated fixture: according to the engineering design requirements, the model and size of the plates used for the first clamping plate (1) and the second clamping plate (2) are determined, corresponding screw holes (103) are provided at the four corners of the first clamping plate (1) and the second clamping plate (2), a hanging hole (101) that can be connected to the hook (70) is provided at one end, and a flange (102) is provided in the middle; {2} Prefabricated stretching mechanism: according to the engineering design requirements, determine the type and size of the plates used for the pad (5) and the baffle (4), determine the length of the long connecting rod (7) according to the distance between the slope and the panel (8), and prefabricate the body (3), the elastic member (6) and the nut (72) according to the design; {3} Prefabricated panel: the panel unit (80) is prefabricated with reinforced concrete, and protrusions (801) are provided on two mutually perpendicular sides of the panel unit (80), and grooves (802) are provided on the other two mutually perpendicular sides. When assembling, the protrusions (801) and grooves (802) between adjacent panel units (80) are interlocked with each other; c. Assembling the stretching mechanism: the external thread section (71) of the connecting rod (7) is placed along the axis of the body (3) into the center of the spiral line that passes through the first through hole (40), the second through hole (50) and the elastic member (6) in sequence, and finally the external thread section (71) of the connecting rod (7) is fixed by a nut (72) to assemble the stretching mechanism; d. Prepare cement mortar and sandy soil filler with higher grade according to the engineering design requirements; e. Masonry panel (8), lay a layer of 2 to 3 cm cement mortar on the base surface, follow the construction order of low first and high later, and construct in layers and sections. After the contact surfaces between the panel units (80) are coated with cement mortar, the protrusions (801) and the grooves (802) are fitted together and the staggered joints are laid; f. After the backfill of the wall and the retaining wall panel (8) are completed for a section, the reinforcement belt (10) is stretched on the pre-prepared backfill base surface, the backfill base surface of the wall and the reinforcement belt (10) are located at the same height, the reinforcement belt (10) is stretched and fixed to the panel (8) by a stretching mechanism; g. Layered compaction. The backfill of the wall should be built synchronously with the main body of the roadbed and in layers. Heavy machinery rolling is prohibited within 1.0m of the panel (8) and at the corners. Use a roller of less than 5t or a light machine such as a vibrating rammer for compaction; h. According to steps e, f, and g, construct the masonry panel (8), fill the back of the wall with soil, and compact it layer by layer until all construction is completed; i. After all construction is completed, adjust the nut (72) so that the force on the reinforcement belt (10) is within the specified limit.

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