A fabricated retaining wall structure and a construction method thereof

Abstract

The present application relates to the technical field of slope engineering, and discloses an assembled retaining wall structure, which comprises a plurality of wall plate components arranged on a rock-soil slope, anchor rods and fasteners, the anchor rods are anchored on the slope, the end of the anchor rod is fixedly connected with the wall plate component through the fastener, the edge of the wall plate component close to the surface of the slope is provided with a frame structure, the bottom of the frame structure is provided with a drainage hole, the upper part of the frame structure is provided with a water-sand hole, and the gap between the wall plate component and the slope is filled with sand bodies. The assembled retaining wall and the construction method can effectively transmit resistance and drain water.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope engineering, in particular to an assembled retaining wall structure and a construction method thereof. BACKGROUND

[0002] The assembled retaining wall is a new type of slope supporting structure system developed in recent years, which has the characteristics of factory production of structural components and rapid construction, and thus has been widely used. The biggest difference between the assembled retaining wall and other assembled buildings is that the assembled structure is difficult to effectively contact with the uneven rock-soil surface and transmit resistance. In the supporting engineering of rock-soil slope, the most commonly used method is to implement a cast-in-place concrete layer between the prefabricated component and the rock-soil surface to ensure the effective contact of the structure with the rock-soil surface. The disadvantage of this method is that it increases the process of cast-in-place concrete on site, which directly offsets the advantages of the assembled structure. The cast-in-place concrete has a water sealing effect, which is not conducive to the drainage of the retaining wall. Therefore, it is necessary to provide an assembled retaining wall structure and a construction method which can effectively transmit resistance and drain water. SUMMARY

[0003] The present application aims to provide an assembled retaining wall structure and a construction method thereof, so as to provide an assembled retaining wall which can effectively transmit resistance and drain water.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an assembled retaining wall structure, comprising a plurality of wall plate components arranged in an array on a rock-soil slope, anchor rods and fasteners, the anchor rods being anchored on the slope, the anchor rods being fixedly connected with the wall plate components through the fasteners, the edge of the wall plate component close to the surface of the slope being provided with a frame structure, the bottom of the frame structure being provided with a drainage hole, the upper part of the frame structure being provided with a water-sand hole, and the gap between the wall plate component and the slope being filled with a sand body.

[0005] The beneficial effects of the present application are as follows:

[0006] 1. Through the connection of the anchor rods, the fasteners and the wall plate components, the wall plate components can be directly and stably connected with the rock-soil slope. Since the gap between the wall plate components and the slope is filled with a sand body, the gap between the rock-soil surface and the wall surface components is eliminated, so that the contact surface between the wall plate components and the rock-soil slope is large and stable, thereby ensuring that the wall plate components can bear the pressure of the rock-soil, and preventing problems such as weathering and peeling off of the rock-soil slope surface, rock and mud flow, collapse, collapse, etc.

[0007] 2. Good drainage performance. By filling the interior with sand bodies and setting drainage holes at the bottom of the frame structure, water accumulation inside the rock-soil slope can be prevented, and each retaining wall structure can be uniformly drained. Compared with other retaining wall structures such as cement retaining walls, the drainage performance is good, avoiding the problem of poor drainage in the rock-soil layer behind the wall, which can lead to an increase in the load behind the wall and the deterioration of the mechanical properties of the rock-soil body, causing problems with the stability of the foundation. At the same time, such a setting is also conducive to the compaction of the sand body, thereby improving the stability of the retaining wall.

[0008] 3. Quick construction and simple structure. The retaining wall in this technical solution is simple in design, and the wall panel components and fasteners can be prefabricated in the factory, which can reduce the noise and dust generated on site, making it convenient to assemble and construct on site, effectively improving construction efficiency and reducing construction costs.

[0009] 4. Flexibility. Since the retaining wall is composed of multiple wall panel components, the structure and area of the retaining wall can be adjusted according to actual needs, which has an advantage in dealing with complex terrain or responding to uncertain engineering conditions. If a part of the wall panel component is damaged, it can be replaced individually, which can reduce the cost of maintenance and repair.

[0010] Preferably, as an improvement, a bearing is embedded in the center of the wall panel component, a spherical anchor cup is sleeved at the end of the anchor rod, a spherical groove adapted to the anchor cup is opened in the center of the bearing, and the anchor cup and the spherical groove are rotationally connected.

[0011] Beneficial effect: The rotational connection design of the anchor cup and the spherical groove makes the connection of the anchor rod and the retaining wall more uniform, which is conducive to the uniform distribution of the pressure borne by the wall panel, avoiding local overload; this structure allows the anchor rod to rotate a certain angle in the bearing when a pre-tightening force is applied to the anchor rod, making the retaining wall better adapt to the slight changes and movements of the ground during installation, increasing the flexibility and stability of the structure.

[0012] Preferably, as an improvement, a conical hole is provided in the center of the wall panel component, and the anchor rod passes through the conical hole and enters the spherical groove.

[0013] Beneficial effect: The conical hole allows the anchor rod to adjust the angle within a certain range when a pre-tightening force is applied to the anchor rod, allowing the wall panel component to automatically adjust the contact angle with the rock-soil slope during installation to better adapt to irregular terrain; the conical hole can guide the insertion of the anchor rod, making the installation process more convenient and efficient; the conical hole of the wall panel component is filled with sand bodies, which are compressed around the anchor rod under the action of the anchor rod. The wall panel component has a tendency to slide downward, which can cause deformation of the anchor rod and displacement of the wall panel component. By filling the conical hole with sand bodies to form a whole to support the wall panel component, the longitudinal pressure on the anchor rod is reduced.

[0014] Preferably, as an improvement, the wall plate component is a quadrangular pyramid.

[0015] Beneficial effects: the wall plate component with a quadrangular pyramid structure can distribute loads more evenly than a flat plate, improving the stability of the retaining wall. When subjected to pressure, the quadrangular pyramid-shaped wall plate can disperse the pressure to the four corners, avoiding the concentration of pressure in a single location that can cause damage or deformation of the wall plate. It can better disperse and evenly bear pressure, improving the strength and stability of the wall plate component. In addition, the wall plate component has good rigidity, effectively resisting bending and torsional forces, preventing deformation of the retaining wall due to uneven loads. At the same time, due to the uneven surface of the wall plate component, rainwater adhering to the surface can be quickly drained, reducing the load on the retaining wall.

[0016] Preferably, as an improvement, the frame structure is provided with a deformable cushion layer on the side close to the slope.

[0017] Beneficial effects: the deformable cushion layer can adapt to irregular rock-soil slope surfaces, especially in uneven rock-soil slope surfaces, helping to reduce the gap between the wall plate component and the slope surface, increase the contact area of the retaining wall with the slope, and enhance its stability. The deformable cushion layer also has a cushioning effect, reducing the impact force on the wall plate component due to earthquakes, falling rocks, soil movement, and other reasons, and reducing damage to the retaining wall caused by impact loads. During construction, the workload of terrain adjustment and treatment is greatly reduced, and the construction difficulty and cost are reduced.

[0018] Preferably, as an improvement, a construction method for an assembled retaining wall structure includes the following implementation steps:

[0019] Step one: complete the retaining wall survey and design according to the site conditions;

[0020] Step two: precast wall plate components, fasteners, and other materials according to the design;

[0021] Step three: perform earthwork excavation according to design requirements;

[0022] Step four: perform on-site line measurement, positioning, drilling, and anchoring rod placement into the hole for grouting and consolidation;

[0023] Step five: hoist the wall plate component, adjust its position to have a gap with the adjacent wall plate component, and pass the anchoring rod through the spherical groove of the wall plate component to preliminarily fix the anchoring rod;

[0024] Step six: inject water and sand into the gap between the wall plate component and the slope through the water and sand hole until the sand body overflows from the water and sand hole. Continue to inject water into the water and sand hole, and after the sand body settles, continue to supplement water and sand until the sand body in the water and sand hole settles again. Then seal the water and sand hole;

[0025] Step seven: re-lock the fastener and pre-tighten the anchor rod.

[0026] Beneficial effects: In this construction step, the sand body is compacted with water, and water ramming can improve the compactness of the sand body, so that the sand body is tightly filled between the wall plate component and the rock-soil slope, and then connected with the wall plate component through the anchor rod, to ensure the transmission effect of the pressure of the wall plate component and the rock-soil slope. The retaining wall structure arranged in this way is fixed and stable, and the stress is uniform. Meanwhile, compared with filling cement mortar, the process of filling water sand not only has low construction difficulty, but also can ensure the drainage effect of the slope. In the technical solution, the anchor rod is fixed twice. The first time, the anchor rod and the wall plate component are preliminarily fixed, the wall plate component is preliminarily positioned, the accuracy of the position of the wall plate component is ensured, and the second time, the anchor rod is further pre-tightened and fixed after the sand filling is completed, the stability of the wall plate component is ensured, and the force transmission of the anchor rod to the wall plate component is further ensured.

[0027] Preferably, as an improvement, the distance between the adjacent wall plate components in step five is 10-30 cm.

[0028] Beneficial effects: On the one hand, the surface of the rock-soil slope may slowly shift over time. By setting the above installation distance between the adjacent wall plate components, it can be ensured that the two adjacent wall plate components will not interfere with each other for a long time, so as to avoid the problems of loss of mechanical properties of the wall plate component and uneven stress damage and deformation. At the same time, the above installation distance can facilitate effective drainage of the interior of the slope.

[0029] Preferably, as an improvement, the sand-blocking and water-filtering material is pasted to the inside of the bottom of the frame structure in step two, and the easily deformed cushion layer is fixed with the frame structure.

[0030] Beneficial effects: The sand-blocking and water-filtering material can effectively prevent the loss of sand through the drainage hole during the drainage process, maintain the stability of the sand body, prevent water accumulation behind the wall, help maintain the mechanical properties of the rock-soil body, reduce the increase of the load behind the wall, protect the stability of the retaining wall, and reduce the subsequent maintenance burden and save construction cost.

[0031] Preferably, as an improvement, the rock-soil slope surface corresponding to the frame structure is modified to be flat in step three.

[0032] Beneficial effects: By modifying the rock-soil slope surface corresponding to the frame structure, the gap between the retaining wall and the rock-soil slope can be reduced, the contact surface between the retaining wall and the rock-soil can be enhanced, the stability of the wall body can be improved, and the load bearing capacity of the retaining wall to the rock-soil pressure can be further improved. In the technical solution, the rock-soil area that needs to be modified is small, and only the position corresponding to the frame structure needs to be modified, which reduces the construction difficulty.

[0033] Preferably, as an improvement, the excess anchor rod is cut off and the fastener is sealed in step 7.

[0034] Beneficial effects: sealing the anchor can protect the anchor rod from corrosion, prolong the service life of the anchor rod, and improve its durability; sealing the anchor can also help maintain a stable connection between the anchor rod and the wall panel component, improving the stability of the overall retaining wall. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a front view of the wall panel component of embodiment 1 of the present application;

[0036] Figure 2 is a side view of the wall panel component of embodiment 1 of the present application;

[0037] Figure 3 is Figure 2 is a diagrammatic view of the place A. DETAILED DESCRIPTION

[0038] The following will be further described in detail through specific embodiments:

[0039] The reference signs in the drawings of the specification include: wall panel component 1, anchor rod 2, anchor head bolt 3, frame structure 4, drainage hole 5, water sand hole 6, bearing 7, anchor cup 8, tapered hole 9, easily deformed cushion 10, sand blocking and water filtering material 11, rock soil 12, sand body 13, anchor seal 14.

[0040] Embodiment 1

[0041] Embodiment 1 is basically as shown in Figures 1-3 , as shown in Figure 1 and Figure 2 , a fabricated retaining wall structure, comprising a plurality of wall panel components 1 arranged in an array on the rock soil 12 slope, anchor rods 2 and fasteners, the anchor rods 2 are anchored on the slope, the anchor rods 2 at the end are fixedly connected with the wall panel components 1 through the fasteners, the fasteners in this embodiment are anchor head bolts 3, the edge of the wall panel component 1 close to the surface of the slope is provided with a frame structure 4, the bottom of the frame structure 4 is arranged in an array with a plurality of drainage holes 5, each wall panel component 1 can be uniformly drained, and the drainage performance is good compared with other retaining wall structures such as cement retaining walls, the upper part of the frame structure 4 is provided with water sand holes 6 for the sand body 13 to enter, and the gap between the wall panel component 1 and the slope is filled with the sand body 13. Figure 1 and Figure 2 , the wall panel component 1 in this embodiment is a quadrangular pyramid, when subjected to pressure, the quadrangular pyramid-shaped wall panel can disperse the pressure to four corners, avoiding the concentration of pressure in a single position causing damage or deformation of the wall panel, better dispersing and uniformly bearing the pressure, improving the strength and stability of the wall panel component 1; as shown in Figure 3As shown, the side of the frame structure 4 close to the slope is provided with a deformable cushion 10, and the deformable cushion 10 and the frame structure 4 are fixedly attached, so that the wall panel component 1 is suitable for the case that the surface of the rock-soil 12 slope is uneven, which helps to reduce the gap between the wall panel component 1 and the surface of the slope, increase the contact area of the retaining wall and the slope, and enhance the stability thereof; the inner side of the bottom of the frame structure 4 is attached with a sand-blocking water-filtering material 11.

[0042] The center of the wall panel component 1 is embedded with a bearing 7, which is made of cast steel in this embodiment. The end of the anchor rod 2 is sleeved with a spherical anchor cup 8. The center of the bearing 7 is provided with a spherical groove adapted to the anchor cup 8. The anchor cup 8 is rotationally connected with the spherical groove. The rotational connection design of the anchor cup 8 and the spherical groove makes the connection of the anchor rod 2 and the retaining wall more uniform, which is conducive to the uniform distribution of the pressure borne by the wall panel and avoids local overload. The center of the wall panel component 1 is provided with a conical hole 9, and the anchor rod 2 passes through the conical hole 9 and enters the spherical groove.

[0043] Embodiment 2

[0044] A construction method of a fabricated retaining wall structure, comprising the following implementation steps:

[0045] Step one: complete the retaining wall survey and design according to the site conditions;

[0046] Step two: design the prefabricated wall panel component 1 and anchor head bolt 3 for later use, and attach the sand-blocking water-filtering material 11 to the inner side of the bottom of the frame structure 4. The sand-blocking water-filtering material 11 in this embodiment is geotextile, which can effectively prevent the loss of sand body 13 through the drainage hole 5 during the drainage process and maintain the stability of the sand body 13; the deformable cushion 10 is attached and fixed on the surface of the frame structure 4 close to the rock-soil 12 slope;

[0047] Step three: perform earthwork excavation according to the design requirements, and correct the rock-soil 12 slope surface corresponding to the frame structure 4 to be straight. By correcting the rock-soil 12 slope surface corresponding to the frame structure 4, the gap between the retaining wall and the rock-soil 12 slope can be reduced, the contact area of the retaining wall and the rock-soil 12 can be increased, and thus the stability of the wall body can be improved;

[0048] Step four: perform on-site line measurement and positioning to drill holes, and place the anchor rod 2 in the holes for grouting and consolidation. The consolidation time is 6-48 hours;

[0049] Step five: hoist the wall panel component 1 and adjust the position so that the distance between the wall panel component 1 and the adjacent wall panel component 1 is 10-30 cm. The anchor rod 2 passes through the spherical groove of the wall panel component 1, and the anchor head bolt 3 is preliminarily pre-tightened to fix the wall panel component 1 on the slope;

[0050] Step six: inject water sand through the water sand hole 6 to the gap between the wallboard component 1 and the slope, until the sand body 13 overflows from the water sand hole 6, continue to inject water at the water sand hole 6, wait for the sand body 13 to settle, then continue to supplement sand, until the sand body 13 at the water sand hole 6 no longer settles, then use concrete to plug the water sand hole 6, the water ramming can improve the compactness of the sand body 13, so that the sand body 13 is tightly filled between the wallboard component 1 and the rock-soil 12 slope, and then the anchor rod 2 and the wallboard component 1 are connected by the anchor head bolt 3 for pre-tightening, to ensure the transmission effect of the pressure of the wallboard component 1 and the rock-soil 12 slope, and the water ramming construction has low difficulty.

[0051] Step seven: relock the anchor head bolt 3 and pre-tighten the anchor rod 2, cut off the excess anchor rod 2, and anchor seal 14 the anchor head bolt 3 with concrete, which can protect the anchor rod 2 from corrosion, prolong the service life of the anchor rod 2, and improve the durability; the anchor rod 2 and the wallboard component 1 are preliminarily fixed for the first time, the wallboard component 1 is preliminarily positioned, the accuracy of the position installation of the wallboard component 1 is ensured, the anchor rod 2 is further pre-tightened and fixed after the sand filling is completed for the second time, the stability of the wallboard component 1 is ensured, and the force transmission of the anchor rod 2 to the wallboard component 1 is further ensured.

[0052] The above is only an embodiment of the present application, and common technical solutions and / or properties in the scheme are not described in detail. It should be noted that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A prefabricated retaining wall structure, characterized in that: It includes multiple wall panel components, anchors and fasteners arranged in array on a rock and soil slope. The anchors are anchored to the slope, and the ends of the anchors are fixedly connected to the wall panel components by fasteners. The edge of the wall panel component near the slope surface is provided with a frame structure. The bottom of the frame structure is provided with a drainage hole, and the top of the frame structure is provided with a water and sand hole. The gap between the wall panel component and the slope is filled with sand.

2. The prefabricated retaining wall structure according to claim 1, characterized in that: The center of the wall panel component is embedded with a bearing member, and the end of the anchor rod is fitted with a spherical anchor cup. The center of the bearing member has a spherical groove that matches the anchor cup, and the anchor cup is rotatably connected to the spherical groove.

3. The prefabricated retaining wall structure according to claim 2, characterized in that: The wall panel component has a conical hole at its center, through which the anchor rod passes into the spherical groove.

4. The prefabricated retaining wall structure according to claim 3, characterized in that: The wall panel components are square pyramidal in shape.

5. A prefabricated retaining wall structure according to claim 4, characterized in that: The side of the frame structure closest to the slope is equipped with a deformable padding layer.

6. The construction method of a prefabricated retaining wall structure according to claim 5, characterized in that: The implementation steps include the following: Step 1: Complete the retaining wall survey and design based on the site conditions; Step 2: Prefabricate wall panel components and fasteners according to the design and set them aside for use; Step 3: Carry out earthwork excavation according to design requirements; Step 4: On-site layout and measurement, positioning and drilling, and grouting and consolidation of anchor bolts in the holes; Step 5: Hoist the wall panel components, adjust their position to ensure there is a gap between them and the adjacent wall panel components, and pass the anchor rods through the spherical grooves of the wall panel components to initially fix the anchor rods; Step 6: Inject water and sand into the gap between the wall panel component and the slope through the water-sand hole until the sand overflows from the water-sand hole. Continue to inject water into the water-sand hole and wait for the sand to settle before adding more sand until the sand at the water-sand hole no longer settles. Then seal the water-sand hole. Step 7: Relock the fasteners and pre-tighten the anchor bolts.

7. The construction method of a prefabricated retaining wall structure according to claim 6, characterized in that: In step five, the distance between adjacent wall panel components is 10-30cm.

8. The construction method of a prefabricated retaining wall structure according to claim 7, characterized in that: In step two, sand-blocking and water-filtering material is pasted onto the drainage holes and the inner bottom of the frame structure to fix the easily deformable pad to the frame structure.

9. A construction method for a prefabricated retaining wall structure according to claim 8, characterized in that: In step three, the rock and soil slope corresponding to the frame structure is straightened.

10. A construction method for a prefabricated retaining wall structure according to claim 9, characterized in that: In step seven, cut off the excess anchor rods and seal the fasteners.

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