Detachable assembly type concrete retaining wall and mounting method

Abstract

The invention discloses a detachable assembly type concrete retaining wall and an installation method, the detachable assembly type concrete retaining wall comprises a prefabricated base layer, bottom layer prefabricated units and standard prefabricated units, the odd number layers are the bottom layer prefabricated units, and the even number layers are the standard prefabricated units; the prefabricated base layer comprises a plurality of prefabricated base layer blocks arranged side by side; the bottom-layer prefabricated unit comprises a plurality of bottom-layer prefabricated unit blocks which are connected side by side, and the adjacent bottom-layer prefabricated unit blocks are fixed by grouting; each standard prefabricated unit comprises a plurality of standard prefabricated unit blocks which are connected side by side, and every two adjacent standard prefabricated unit blocks are fixed through grouting. The core connection mode of the prefabricated part is grouting connection, the injected slurry, such as high-grade cement mortar, can provide enough connection strength after being solidified, the integrity and the stability are good, when the prefabricated part needs to be disassembled, the slurry can be easily broken through a small breaking tool, and structural damage cannot be caused to the prefabricated part body. Screws, holes and the like on the component can be repeatedly used, and economic and environment-friendly benefits are remarkable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geotechnical engineering and building engineering, in particular to a detachable assembly type concrete retaining wall and a mounting method. BACKGROUND

[0002] A retaining wall is a structure widely used in civil engineering to resist lateral pressure of soil and prevent soil collapse. Traditional retaining walls are mostly constructed by cast-in-place concrete, which has many drawbacks. In order to overcome the shortcomings of cast-in-place retaining walls, assembly type retaining walls have emerged. Existing assembly type retaining walls are usually assembled by precast concrete blocks. However, the existing technical solutions still have some deficiencies: many solutions rely only on the simple mortise and tenon or gravity connection between blocks, which lacks overall strength and stability, and has safety hazards when bearing large soil pressure. Although it is called "assembly type", the connection method is mostly one-way and irreversible, making the disassembly process difficult and easily damaging the components, resulting in a very low rate of reuse.

[0003] Therefore, there is an urgent need in the art for an assembly type retaining wall structure that can ensure structural strength and overall stability, and achieve rapid, non-destructive disassembly and reuse. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a detachable assembly type concrete retaining wall and a mounting method, which solves the problems of insufficient overall strength and stability of the assembly type retaining wall in the prior art, difficulty in disassembly process, easy damage to components, and low reuse rate.

[0005] To solve the above technical problems, the present application adopts the following technical solutions: a detachable assembly type concrete retaining wall, comprising a precast base layer, a bottom layer precast unit mounted on the precast base layer, and a standard precast unit mounted on the bottom layer precast unit, the odd layers being bottom layer precast units and the even layers being standard precast units.

[0006] The precast base layer comprises a plurality of precast base blocks arranged side by side.

[0007] The bottom layer precast unit comprises a plurality of bottom layer precast unit blocks arranged side by side, the bottom layer precast unit blocks are respectively mounted on the precast base blocks and fixed by grouting, and the adjacent bottom layer precast unit blocks are inserted and matched and fixed by grouting.

[0008] The standard precast unit comprises a plurality of standard precast unit blocks arranged side by side, the standard precast unit blocks are overlapped on the adjacent two bottom layer precast unit blocks on the upper and lower surfaces and fixed by grouting, and the adjacent standard precast unit blocks are inserted and matched and fixed by grouting.

[0009] The bottom layer prefabricated unit block is provided with a first solid waste filling cavity penetrating up and down, and the standard prefabricated unit block is provided with a second solid waste filling cavity penetrating up and down.

[0010] The application also has the following technical features: The prefabricated base layer block comprises a prefabricated base layer block body and a first limiting groove formed on the upper surface of the prefabricated base layer block body.

[0011] The prefabricated base layer block further comprises an anti-slip convex rib installed on the lower surface of the prefabricated base layer block body.

[0012] The bottom layer prefabricated unit block comprises a bottom layer prefabricated unit block body, which is generally in the shape of a cuboid.

[0013] The bottom surface of the bottom layer prefabricated unit block body of the first layer is provided with a first limiting convex rib, which cooperates with the first limiting groove.

[0014] The top surface of the bottom layer prefabricated unit block body of the first layer is provided with a second limiting convex rib, which cooperates with the standard prefabricated unit block.

[0015] One side surface of the bottom layer prefabricated unit block body is provided with a plurality of first connecting holes, and the other side surface of the bottom layer prefabricated unit block body is provided with a plurality of first screw rods.

[0016] The top surface of the bottom layer prefabricated unit block body is further provided with a first grouting hole.

[0017] The first grouting hole penetrates the upper and lower end surfaces of the bottom layer prefabricated unit block body, and the first connecting hole communicates with the first grouting hole.

[0018] The bottom surface of the bottom layer prefabricated unit block body of the remaining layers is provided with a fixing groove, which cooperates with the third limiting convex rib of the adjacent layer.

[0019] The standard prefabricated unit block comprises a standard prefabricated unit block body, which is generally in the shape of a cuboid.

[0020] The bottom surface of the standard prefabricated unit block body is provided with a second limiting groove, which cooperates with the first limiting convex rib.

[0021] The top surface of the standard prefabricated unit block body is provided with a third limiting convex rib, which cooperates with the first limiting convex rib.

[0022] The standard prefabricated unit block is provided with a plurality of second connecting holes on one side surface, and a plurality of second screw rods on the other side surface.

[0023] The standard prefabricated unit block is further provided with a second grouting hole on the top surface.

[0024] The second grouting hole penetrates the upper and lower end surfaces of the standard prefabricated unit block, and the second connecting hole communicates with the second grouting hole.

[0025] The first layer of bottom prefabricated unit blocks have a cross section in the shape of a right trapezoid, and the height of the rear end surface is greater than the height of the front end surface.

[0026] The cross sections of the remaining bottom prefabricated unit blocks are in the shape of a parallelogram.

[0027] The cross section of the standard prefabricated unit block is in the shape of a parallelogram.

[0028] The first layer of bottom prefabricated unit blocks and the prefabricated base layer blocks are further provided with a water filtration connecting structure.

[0029] The prefabricated base layer blocks are further provided with a first V-shaped groove on the top surface, and the first V-shaped groove is provided with a first additional screw rod; the front end surface of the first layer of bottom prefabricated unit blocks is further provided with a second V-shaped groove, and the second V-shaped groove is provided with a second additional screw rod.

[0030] The water filtration connecting structure is installed between the first V-shaped groove and the second V-shaped groove, and is fixed by the first additional screw rod and the second additional screw rod.

[0031] The water filtration connecting structure comprises a water filtration connecting frame and a steel grating installed in the water filtration connecting frame, and the water filtration connecting frame is provided with a circular hole for cooperating with the first additional screw rod and the second additional screw rod.

[0032] The water filtration connecting structure further comprises a filter layer installed on the steel grating.

[0033] The filter layer comprises, in sequence, a sand layer, a first steel wire mesh layer, a pebble layer, a second steel wire mesh layer, a gravel layer, a third steel wire mesh layer and a first geotextile, which are installed on one side of the steel grating.

[0034] The filter layer further comprises a fourth steel wire mesh layer and a second geotextile, which are installed on the other side of the steel grating.

[0035] The first geotextile is arranged in a direction opposite to the first layer of bottom prefabricated unit blocks.

[0036] The prefabricated base block is also provided with a drainage hole, one end of the drainage hole is located between the first V-shaped groove and the first limiting groove, and the other end of the drainage hole is located at the rear end surface of the prefabricated base block.

[0037] The application also provides a mounting method of the detachable assembly type concrete retaining wall, which is realized by using the detachable assembly type concrete retaining wall and comprises the following steps. Step 1, foundation treatment and support installation: Firstly, the foundation of the construction site is leveled and compacted, and then the bottom layer of the prefabricated unit block is placed in position according to the designed interval, and the first limiting rib on the surface of the bottom layer of the prefabricated unit block is embedded in the surface layer of the foundation to increase the stability.

[0038] Step 2, installation of the first layer of bottom layer prefabricated unit: The bottom layer prefabricated unit is hoisted to the prefabricated base, and the first limiting rib on the bottom surface of the bottom layer prefabricated unit block is accurately embedded in the first limiting groove on the upper surface of the prefabricated base block body, at the same time, the first screw rod on the side surface of the adjacent bottom layer prefabricated unit block is inserted into the first connecting hole of the adjacent bottom layer prefabricated unit block, realizing the horizontal preliminary positioning, and the solid waste is filled into the first solid waste filling cavity.

[0039] Step 3, installation of the water filtering connecting structure: The water filtering connecting frame is placed between the first V-shaped groove and the second V-shaped groove, and the first additional screw rod and the second additional screw rod are used to fasten the water filtering connecting frame to the first layer of bottom layer prefabricated unit block and the prefabricated base block by penetrating the circular hole on the support and the first additional screw rod and the second additional screw rod in the notch.

[0040] Step 4, backfilling and laying of the inverse filter layer: The steel grating and the inverse filter layer are installed in the water filtering connecting frame, that is, the steel grating is laid first, and then the sand layer, the gravel layer and the gravel layer are laid in turn, the layers are separated by steel wire mesh, the steel wire mesh is welded and fixed with the angle steel, a screw rod is arranged in each layer and inserted into the small hole on the angle steel for fixing the angle steel, geotextile is laid on the bottom layer and the top layer, then a nut is installed on the top for fixing each soil layer, and finally the backfilling and compaction of the soil body behind the wall are carried out.

[0041] Step 5, installation of the remaining bottom layer prefabricated unit and standard prefabricated unit.

[0042] The standard prefabricated unit is hoisted to the bottom layer prefabricated unit, and the second limiting groove on the bottom surface of the standard prefabricated unit block is accurately buckled on the second limiting rib of the first layer of bottom layer prefabricated unit.

[0043] At the same time, the second screw rod of the adjacent standard prefabricated unit block is inserted into the second connecting hole, realizing the horizontal connection with the adjacent standard prefabricated unit block in the same layer, and the solid waste is filled into the middle second solid waste filling cavity area.

[0044] If there is a high need in height, the bottom precast unit and the standard precast unit can be stacked in turn in the above manner; staggered arrangement is adopted to enhance stability, as shown in Figure 1

[0045] Step 6, grouting and solidification: The slurry is injected downward through the first grouting hole or the second grouting hole, fills the first connecting hole and the second connecting hole, fills the gap between the first limiting groove and the first limiting rib, fills the gap between the second limiting groove and the second limiting rib, and fills the gap between the fixing groove and the third limiting rib, forming firm horizontal and vertical connections, and after the slurry reaches the design strength, the detachable assembled concrete retaining wall structure has working performance.

[0046] Compared with the prior art, the present application has the following technical effects: (I) The detachable assembled concrete retaining wall provided by the present application adopts a core connection mode of "grouting connection", and the grouted slurry, such as high-grade cement mortar, can provide sufficient connection strength after solidification, and has good integrity and stability; when disassembly is required, the slurry can be easily broken by a small crushing tool, and the main body of the precast component will not be structurally damaged. The screw rods and holes on the component can be reused, and the economic and environmental benefits are significant.

[0047] (II) The detachable assembled concrete retaining wall provided by the present application is formed by the mutual embedding of the first limiting rib of the first layer of bottom precast unit blocks and the first limiting groove of the precast base blocks, and the mutual embedding of the second limiting rib of the first layer of bottom precast unit blocks and the second limiting groove of the standard precast unit blocks, forming an effective vertical shear resistance and anti-sliding mechanism.

[0048] The same layer of bottom precast unit blocks or standard precast unit blocks are tightly connected into a whole by the mutual insertion of the screw rods and the connecting holes and grouting, and jointly resist the earth pressure.

[0049] The unique water filtering connection structure is fixed on the V-shaped groove of the first layer of bottom precast unit blocks and the precast base blocks by an additional screw rod, forming a powerful triangular support system, which greatly improves the overturning resistance of the retaining wall.

[0050] (III) The detachable assembled concrete retaining wall provided by the present application is precast in a factory, and the quality is controllable. Only simple processes such as "placement-splicing-grouting" are required on site, which greatly reduces the amount of manual work and construction time, reduces labor intensity, and is especially suitable for emergency rescue projects or projects with tight schedules.

[0051] ​(IV) The detachable assembly type concrete retaining wall provided by the application is provided with drainage holes on the prefabricated base layer block body, which is combined with the filter layer, can quickly drain the accumulated water in the backfill soil, effectively reduces the water pressure on the back of the wall, and is a key design for ensuring the long-term stability of the retaining wall. The anti-sliding convex ribs on the lower surface of the prefabricated base layer block body can increase the friction with the foundation, disperse the pressure transmitted by the wall body, and are suitable for various foundation conditions. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is an overall structure schematic view of the detachable assembly type concrete retaining wall of the application.

[0053] Figure 2 It is an overall structure schematic view of the prefabricated base layer of the application.

[0054] Figure 3 It is an overall structure schematic view of the bottom layer prefabricated unit directly connected with the prefabricated base layer of the application.

[0055] Figure 4 It is an overall structure schematic view of the standard prefabricated unit of the application.

[0056] Figure 5 It is an overall structure schematic view of the water filtering connecting structure of the application.

[0057] Figure 6 It is an installation position schematic view of the steel grating of the application.

[0058] Figure 7 It is a structure schematic view of the filter layer of the application.

[0059] Meaning of each reference numeral in the drawings: 1-prefabricated base layer, 2-bottom layer prefabricated unit, 3-standard prefabricated unit, 4-water filtering connecting structure.

[0060] 1-1-prefabricated base layer block.

[0061] 2-1-bottom layer prefabricated unit block, 2-2-first solid waste filling cavity.

[0062] 3-1-standard prefabricated unit block, 3-2-second solid waste filling cavity.

[0063] 4-1-water filtering connecting frame, 4-2-steel grating, 4-3-round hole, 4-4-filter layer.

[0064] 1-1-1-prefabricated base layer block body, 1-1-2-first limiting groove, 1-1-3-anti-sliding convex rib, 1-1-4-first V-shaped groove, 1-1-5-first additional screw rod, 1-1-6-drainage hole.

[0065] 2-1-1 - bottom layer prefabricated unit block, 2-1-2 - first limiting convex rib, 2-1-3 - second limiting convex rib, 2-1-4 - first connecting hole, 2-1-5 - first screw rod, 2-1-6 - first grouting hole, 2-1-7 - second V-shaped groove, 2-1-8 - second additional screw rod.

[0066] 3-1-1 - standard prefabricated unit block, 3-1-2 - second limiting groove, 3-1-3 - third limiting convex rib, 3-1-4 - second connecting hole, 3-1-5 - second screw rod, 3-1-6 - second grouting hole.

[0067] 4-4-1 - sand layer, 4-4-2 - first steel wire mesh layer, 4-4-3 - pebble layer, 4-4-4 - second steel wire mesh layer, 4-4-5 - gravel layer, 4-4-6 - third steel wire mesh layer, 4-4-7 - first geotextile, 4-4-8 - fourth steel wire mesh layer, 4-4-9 - second geotextile.

[0068] The specific content of the application is further explained in detail in combination with the following examples. DETAILED DESCRIPTION

[0069] All components in the application, unless otherwise specified, all use known components in the prior art.

[0070] The following gives specific examples of the application, it should be noted that the application is not limited to the following specific examples, any equivalent transformation made on the basis of the technical solutions of the application falls within the protection scope of the application.

[0071] Example 1: This example gives a kind of detachable assembly type concrete retaining wall, as shown in Figure Figure 1 It includes prefabricated base layer 1, bottom layer prefabricated unit 2 installed on prefabricated base layer 1 and standard prefabricated unit 3 installed on bottom layer prefabricated unit 2, odd layer is bottom layer prefabricated unit 2, even layer is standard prefabricated unit 3.

[0072] The prefabricated base layer 1 includes a plurality of prefabricated base layer blocks 1-1 arranged side by side.

[0073] The bottom layer prefabricated unit 2 includes a plurality of bottom layer prefabricated unit blocks 2-1 arranged side by side, the bottom layer prefabricated unit blocks 2-1 are respectively installed on the prefabricated base layer blocks 1-1 and grouted and fixed, the adjacent bottom layer prefabricated unit blocks 2-1 are inserted and matched and grouted and fixed.

[0074] The standard prefabricated unit 3 comprises a plurality of standard prefabricated unit blocks 3-1 arranged side by side, the upper and lower surfaces of the standard prefabricated unit blocks 3-1 are lapped on two adjacent bottom prefabricated unit blocks 2-1 and fixed by grouting, and the adjacent standard prefabricated unit blocks 3-1 are inserted and matched and fixed by grouting.

[0075] The bottom prefabricated unit block 2-1 is provided with a first solid waste filling cavity 2-2 penetrating through the upper and lower surfaces, and the standard prefabricated unit block 3-1 is provided with a second solid waste filling cavity 3-2 penetrating through the upper and lower surfaces, and the first solid waste filling cavity 2-2 and the second solid waste filling cavity 3-2 are penetrated.

[0076] The core connection mode of the application is "grouting connection", and the grout, such as high-grade cement mortar, can provide sufficient connection strength after solidification, and the integrity and stability are good, and when disassembly is needed, the grout can be easily broken by a small crushing tool, and the main body of the prefabricated component will not be structurally damaged. The screw rod and the hole on the component can be reused, and the economic and environmental benefits are significant.

[0077] And the first limiting convex rib of the first layer of bottom prefabricated unit blocks and the first limiting groove of the prefabricated base block are mutually embedded, and the second limiting convex rib of the first layer of bottom prefabricated unit blocks and the second limiting groove of the standard prefabricated unit block are mutually embedded, forming an effective vertical shear and anti-sliding mechanism.

[0078] The screw rod and the connecting cavity are mutually inserted and grouted, and the bottom prefabricated unit blocks or the standard prefabricated unit blocks in the same layer are tightly connected into a whole, and resist the earth pressure together.

[0079] As a preferred embodiment of the application: As shown in Figure 2 The prefabricated base block 1-1 comprises a prefabricated base block body 1-1-1 and a first limiting groove 1-1-2 opened on the upper surface of the prefabricated base block body 1-1-1, and the first limiting groove 1-1-2 is used in cooperation with the bottom prefabricated unit block 2-1.

[0080] The prefabricated base block 1-1 further comprises an anti-sliding convex rib 1-1-3 installed on the lower surface of the prefabricated base block body 1-1-1.

[0081] As a preferred embodiment of the application: As shown in Figure 3 The bottom prefabricated unit block 2-1 comprises a bottom prefabricated unit block body 2-1-1, the bottom prefabricated unit block body 2-1-1 is generally in the shape of a cuboid, and the first solid waste filling cavity 2-2 is opened on the bottom prefabricated unit block body 2-1-1.

[0082] The bottom surface of the first layer of the bottom prefabricated unit block 2-1-1 is provided with a first limiting convex rib 2-1-2, which is matched with the first limiting groove 1-1-2.

[0083] The top surface of the first layer of the bottom prefabricated unit block 2-1-1 is provided with a second limiting convex rib 2-1-3, which is used for matching with the standard prefabricated unit block 3-1.

[0084] One side surface of the bottom prefabricated unit block 2-1-1 is provided with a plurality of first connecting holes 2-1-4, and the other side surface of the bottom prefabricated unit block 2-1-1 is provided with a plurality of first screw rods 2-1-5.

[0085] The top surface of the bottom prefabricated unit block 2-1-1 is further provided with a first grouting hole 2-1-6.

[0086] The first grouting hole 2-1-6 penetrates the upper and lower end surfaces of the bottom prefabricated unit block 2-1-1, and the first connecting hole 2-1-4 communicates with the first grouting hole 2-1-6.

[0087] As a preferred embodiment of the present application: As shown in Figure 4 The standard prefabricated unit block 3-1 includes a standard prefabricated unit block body 3-1-1, which is generally in the shape of a cuboid, and the second solid waste filling cavity 3-2 is formed in the standard prefabricated unit block body 3-1-1.

[0088] The bottom surface of the standard prefabricated unit block body 3-1-1 is provided with a second limiting groove 3-1-2, which is matched with the first limiting convex rib 2-1-2.

[0089] The top surface of the standard prefabricated unit block body 3-1-1 is provided with a third limiting convex rib 3-1-3, which is used for matching with the first limiting convex rib 2-1-2.

[0090] One side surface of the standard prefabricated unit block body 3-1-1 is provided with a plurality of second connecting holes 3-1-4, and the other side surface of the standard prefabricated unit block body 3-1-1 is provided with a plurality of second screw rods 3-1-5.

[0091] The top surface of the standard prefabricated unit block body 3-1-1 is further provided with a second grouting hole 3-1-6.

[0092] The second grouting hole 3-1-6 penetrates the upper and lower end surfaces of the standard prefabricated unit block body 3-1-1, and the second connecting hole 3-1-4 communicates with the second grouting hole 3-1-6.

[0093] The bottom surface of the bottom layer prefabricated unit block 2-1-1 is provided with a fixing groove for cooperating with the third limiting rib 3-1-3 of the adjacent layer.

[0094] As a preferred embodiment of the present embodiment: The cross section of the first layer bottom layer prefabricated unit block 2-1-1 is a right trapezoid, and the height of the rear end surface is greater than the height of the front end surface.

[0095] The cross section of the remaining bottom layer prefabricated unit block 2-1-1 is a parallelogram.

[0096] As a preferred embodiment of the present embodiment: The cross section of the standard prefabricated unit block 3-1-1 is a parallelogram.

[0097] As a preferred embodiment of the present embodiment: As shown in Figures 1-3 , 5-7, the first layer bottom layer prefabricated unit 2-1 and prefabricated base block 1-1 are also provided with a water filtering connecting structure 4.

[0098] The top surface of the prefabricated base block 1-1 is also provided with a first V-shaped groove 1-1-4, and the first V-shaped groove 1-1-4 is provided with a first additional screw 1-1-5, and the front end surface of the first layer bottom layer prefabricated unit block 2-1-1 is also provided with a second V-shaped groove 2-1-7, and the second V-shaped groove 2-1-7 is provided with a second additional screw 2-1-8.

[0099] The water filtering connecting structure 4 is installed between the first V-shaped groove 1-1-4 and the second V-shaped groove 2-1-7, and is fixed by the first additional screw 1-1-5 and the second additional screw 2-1-8.

[0100] The water filtering connecting structure 4 comprises a water filtering connecting frame 4-1 and a steel grating 4-2 installed in the water filtering connecting frame 4-1, and the water filtering connecting frame 4-1 is provided with a circular hole 4-3, and the circular hole 4-3 is used for cooperating with the first additional screw 1-1-5 and the second additional screw 2-1-8.

[0101] The water filtering connecting structure 4 further comprises a filter layer 4-4 installed on the steel grating 4-2.

[0102] The filter layer 4-4 comprises a sand layer 4-4-1, a first steel wire mesh layer 4-4-2, a pebble layer 4-4-3, a second steel wire mesh layer 4-4-4, a gravel layer 4-4-5, a third steel wire mesh layer 4-4-6 and a first geotextile 4-4-7 installed in sequence on one side of the steel grating 4-2.

[0103] The inverse filter layer 4-4 further comprises a fourth steel mesh layer 4-4-8 and a second geotextile 4-4-9 installed in sequence on the other side of the steel grid 4-2.

[0104] The first geotextile 4-4-7 is arranged in a direction opposite to the first layer bottom layer prefabricated unit block 2-1.

[0105] The steel grid 4-2 plays a role of force fixation, and is used for fixing the inverse filter layer 4-4. The inner side of the water filter connecting frame 4-1 is further provided with an angle steel. The angle steel is used for fixing the sand layer 4-4-1, the pebble layer 4-4-3 and the gravel layer 4-4-5 in cooperation with each steel mesh layer. Each steel mesh layer is fixedly connected with the steel grid 4-2 through bolts.

[0106] As a preferred embodiment of the present embodiment: As shown in Figure 2 The prefabricated base layer block 1-1 is further provided with a drainage hole 1-1-6. One end of the drainage hole 1-1-6 is located between the first V-shaped groove 1-1-4 and the first limiting groove 1-1-2. The other end of the drainage hole 1-1-6 is located at the rear end surface of the prefabricated base layer block 1-1.

[0107] The multiple inverse filter layers 4-4 formed by the particle size gradation and laid in the water filter connecting frame 4-1 constitute a key drainage and inverse filter system of the retaining wall.

[0108] The system can quickly collect and discharge the seepage water in the backfill soil behind the wall, significantly reduce the hydrostatic pressure and pore water pressure of the wall back, and effectively block the migration of fine particles in the backfill soil with water flow, and then the water flows out of the drainage hole 1-1-6 in the prefabricated base layer block 1-1, only water is discharged to prevent sand from coming out, thereby fundamentally preventing internal erosion and hollowing of the backfill soil caused by water and soil loss, and ensuring the integrity and strength of the soil body.

[0109] This design not only directly reduces the load borne by the wall, but also maintains the long-term stability of the soil behind the wall, avoids secondary disasters such as settlement and deformation, and is one of the core designs to ensure the safe and stable operation of the retaining wall in the whole life cycle.

[0110] Embodiment 2 A mounting method of a detachable assembly type concrete retaining wall is realized by using the detachable assembly type concrete retaining wall in embodiment 1, and comprises the following steps. Step 1, foundation treatment and support installation: First, the foundation of the construction site is leveled and compacted, and then the bottom layer prefabricated unit block 2-1-1 is placed in place at a designed interval. The anti-slip ribs 1-1-3 on the surface of the bottom layer prefabricated unit block 2-1-1 are embedded in the surface layer of the foundation to increase stability.

[0111] Step 2, install the first layer of bottom prefabricated unit 2: Lift the bottom prefabricated unit 2 onto the prefabricated base layer 1, ensure that the first limiting rib 2-1-2 on the bottom surface of the bottom prefabricated unit block 2-1-1 is accurately embedded in the first limiting groove 1-1-2 on the upper surface of the prefabricated base layer block body 1-1-1, at the same time, the first screw 2-1-5 on the side surface of the adjacent bottom prefabricated unit block 2-1-1 is inserted into the first connecting hole 2-1-4 of the adjacent bottom prefabricated unit block 2-1-1, realizing the initial transverse positioning, and filling the solid waste into the first solid waste filling cavity 2-2.

[0112] Step 3, install the water filtration connecting structure: Place the water filtration connecting frame 4-1 between the first V-shaped groove 1-1-4 and the second V-shaped groove 2-1-7, use nuts and other fasteners to pass through the circular holes 4-3 on the water filtration connecting frame 4-1 and the first additional screw 1-1-5 and the second additional screw 2-1-8, and firmly fix the water filtration connecting frame 4-1 between the first layer of bottom prefabricated unit block 2-1 and the prefabricated base layer block 1-1.

[0113] Step 4, backfill and lay the inverse filtration layer: Install the steel grating 4-2 and the inverse filtration layer 4-4 in the water filtration connecting frame 4-1, that is, first lay the steel grating 4-2, then lay the sand layer 4-4-1, the pebble layer 4-4-3 and the gravel layer 4-4-5 in turn, each layer is separated by steel mesh, the steel mesh is welded and fixed with angle steel, geotextile is laid on the bottom layer and the top layer, each layer of steel mesh is fixed and connected with the steel grating 4-2 through bolts, used for fixing each soil layer, and finally backfill and compact the soil behind the wall.

[0114] Step 5, install the remaining bottom prefabricated unit and standard prefabricated unit.

[0115] Lift the standard prefabricated unit 3 onto the bottom prefabricated unit 2, ensure that the second limiting groove 3-1-2 on the bottom surface of the standard prefabricated unit block 3-1-1 is accurately buckled on the second limiting rib 2-1-3 of the first layer of bottom prefabricated unit 2, At the same time, ensure that the second screw 3-1-5 of the adjacent standard prefabricated unit block 3-1-1 is inserted into the second connecting hole 3-1-4, realizing transverse connection with the adjacent standard prefabricated unit block 3-1-1 in the same layer, and filling solid waste into the middle second solid waste filling cavity 3-2 area.

[0116] If there is a need for height, the bottom prefabricated unit 2 and the standard prefabricated unit 3 can be stacked in turn according to the above method.

[0117] Step 6, grouting and solidification: Through the first grouting hole 2-1-6 or the second grouting hole 3-1-6, the slurry is injected downward, the slurry fills the first connecting hole 2-1-4 and the second connecting hole 3-1-4, fills the gap between the first limiting groove 1-1-2 and the first limiting rib 2-1-2, fills the gap between the second limiting groove 3-1-2 and the second limiting rib 2-1-3, and fills the gap between the fixed groove and the third limiting rib 3-1-3, forming a firm horizontal and vertical connection, and when the slurry reaches the design strength, the detachable and assembled concrete retaining wall structure has working performance.

[0118] The disassembly process is as follows: When the project needs to end, reverse operation is performed. First, the slurry of all grouting connection points is broken by using a small tool such as a pneumatic pick. Then, the nut on the water filtering connection frame 4-1 matched with the first additional screw 1-1-5 and the second additional screw 2-1-8 is loosened, and the water filtering connection frame 4-1 and the filter layer 4-3 are removed. Finally, the standard prefabricated unit 3, the bottom layer prefabricated unit 2 and the prefabricated base layer 1 are successively lifted away in the order from top to bottom, and after simple cleaning and maintenance, all components can be transported to the next construction site for repeated use.

[0119] The above technical solution is only a relatively preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can think of changes or replacements within the technical range disclosed by the present application without creative labor, which are all covered in the protection scope of the present application.

Claims

1. A demountable assembled concrete retaining wall, characterised in that, The utility model relates to a prefabricated foundation (1), bottom layer prefabricated unit (2) installed on prefabricated foundation (1) and standard prefabricated unit (3) installed on bottom layer prefabricated unit (2), odd layer is bottom layer prefabricated unit (2), even layer is standard prefabricated unit (3) are provided. The prefabricated foundation (1) comprises a plurality of prefabricated foundation blocks (1-1) arranged side by side. The bottom layer prefabricated unit (2) comprises a plurality of bottom layer prefabricated unit blocks (2-1) arranged side by side. The standard prefabricated unit (3) comprises a plurality of standard prefabricated unit blocks (3-1) arranged side by side. The prefabricated foundation block (1-1) comprises a prefabricated foundation block body (1-1-1) and a first limiting groove (1-1-2) formed on the upper surface of the prefabricated foundation block body (1-1-1).

2. The demountable assembled concrete retaining wall according to claim 1, wherein, The prefabricated foundation block (1-1) further comprises an anti-slip rib (1-1-3) installed on the lower surface of the prefabricated foundation block body (1-1-1). The bottom layer prefabricated unit block (2-1) comprises a bottom layer prefabricated unit block body (2-1-1) in the shape of a cuboid.

3. The demountable assembled concrete retaining wall according to claim 2, wherein, The bottom surface of the bottom layer prefabricated unit block body (2-1-1) of the first layer is provided with a first limiting rib (2-1-2) which cooperates with the first limiting groove (1-1-2). The top surface of the bottom layer prefabricated unit block body (2-1-1) of the first layer is provided with a second limiting rib (2-1-3) which cooperates with the standard prefabricated unit block (3-1). One side surface of the bottom layer prefabricated unit block body (2-1-1) is provided with a plurality of first connecting holes (2-1-4), and the other side surface is provided with a plurality of first screw rods (2-1-5). The top surface of the bottom layer prefabricated unit block body (2-1-1) is further provided with a first grouting hole (2-1-6). The first grouting hole (2-1-6) penetrates the upper and lower end surfaces of the bottom layer prefabricated unit block body (2-1-1), and the first connecting holes (2-1-4) are connected to the first grouting hole (2-1-6). The standard prefabricated unit block (3-1) comprises a standard prefabricated unit block body (3-1-1) in the shape of a cuboid.

4. The demountable assembled concrete retaining wall of claim 3, wherein, ​ The bottom surface of the standard prefabricated unit block (3-1-1) is provided with a second limiting groove (3-1-2), which cooperates with the first limiting rib (2-1-2); The top surface of the standard prefabricated unit block (3-1-1) is provided with a third limiting rib (3-1-3), which cooperates with the first limiting rib (2-1-2); One side surface of the standard prefabricated unit block (3-1-1) is provided with a plurality of second connecting holes (3-1-4), and the other side surface is provided with a plurality of second screw rods (3-1-5); The top surface of the standard prefabricated unit block (3-1-1) is also provided with a second grouting hole (3-1-6); The second grouting hole (3-1-6) penetrates the upper and lower end surfaces of the standard prefabricated unit block (3-1-1), and the second connecting hole (3-1-4) communicates with the second grouting hole (3-1-6); The bottom surface of the bottom layer prefabricated unit block (2-1-1) of the remaining layers is provided with a fixing groove for cooperating with the third limiting rib (3-1-3) of the adjacent layer.

5. The demountable, assembled concrete retaining wall of claim 4, wherein, The cross section of the first layer bottom layer prefabricated unit block (2-1-1) is a right trapezoid, and the height of the rear end surface is greater than that of the front end surface. The cross section of the remaining bottom layer prefabricated unit block (2-1-1) is a parallelogram.

6. The demountable, assembled concrete retaining wall of claim 5, wherein, The cross section of the standard prefabricated unit block (3-1-1) is a parallelogram.

7. The demountable, assembled concrete retaining wall of claim 5, wherein, The first layer bottom layer prefabricated unit block (2-1) and the prefabricated base layer block (1-1) are also provided with a water filtering connecting structure (4); The top surface of the prefabricated base layer block (1-1) is also provided with a first V-shaped groove (1-1-4), and the first V-shaped groove (1-1-4) is provided with a first additional screw rod (1-1-5); the front end surface of the first layer bottom layer prefabricated unit block (2-1-1) is also provided with a second V-shaped groove (2-1-7), and the second V-shaped groove (2-1-7) is provided with a second additional screw rod (2-1-8); The water filtering connecting structure (4) is installed between the first V-shaped groove (1-1-4) and the second V-shaped groove (2-1-7), and is fixed by the first additional screw rod (1-1-5) and the second additional screw rod (2-1-8); The water filtering connecting structure (4) comprises a water filtering connecting frame (4-1) and a steel grating (4-2) installed in the water filtering connecting frame (4-1); the water filtering connecting frame (4-1) is provided with a circular hole (4-3) for cooperating with the first additional screw rod (1-1-5) and the second additional screw rod (2-1-8); The water filtering connecting structure (4) further comprises a filter layer (4-4) installed on the steel grating (4-2). The anti-filter layer (4-4) comprises a sand layer (4-4-1), a first steel mesh layer (4-4-2), a pebble layer (4-4-3), a second steel mesh layer (4-4-4), a gravel layer (4-4-5), a third steel mesh layer (4-4-6) and a first geotextile (4-4-7) which are sequentially arranged on one side of the steel grating (4-2); The anti-filter layer (4-4) further comprises a fourth steel mesh layer (4-4-8) and a second geotextile (4-4-9) which are sequentially arranged on the other side of the steel grating (4-2); The first geotextile (4-4-7) is arranged in a direction away from the first layer bottom precast unit block (2-1).

8. The demountable, assembled concrete retaining wall of claim 7, wherein, The precast base layer block (1-1) is further provided with a drainage hole (1-1-6), one end of the drainage hole (1-1-6) is located between the first V-shaped groove (1-1-4) and the first limiting groove (1-1-2), and the other end of the drainage hole (1-1-6) is located at the rear end surface of the precast base layer block (1-1).

9. The demountable, assembled concrete retaining wall of claim 1, wherein, The bottom precast unit block (2-1) is provided with a first solid waste filling cavity (2-2) penetrating up and down, the standard precast unit block (3-1) is provided with a second solid waste filling cavity (3-2) penetrating up and down, and the first solid waste filling cavity (2-2) and the second solid waste filling cavity (3-2) are through; The first solid waste filling cavity (2-2) is arranged on the bottom precast unit block body (2-1-1), and the second solid waste filling cavity (3-2) is arranged on the standard precast unit block body (3-1-1).

10. A method of installing a demountable assembled concrete retaining wall, characterised by, The detachable assembly type concrete retaining wall is realized by the steps of: Step 1, foundation treatment and support installation: Firstly, the foundation of the construction site is leveled and compacted, then the bottom precast unit block body (2-1-1) is placed in position according to the designed interval, and the anti-slip ribs (1-1-3) on the surface of the bottom precast unit block body (2-1-1) are embedded in the surface layer of the foundation to increase stability; Step 2, installation of the first layer bottom precast unit (2): The bottom precast unit (2) is hoisted to the precast base layer (1), and the first limiting rib (2-1-2) on the bottom surface of the bottom precast unit block body (2-1-1) is accurately embedded in the first limiting groove (1-1-2) on the upper surface of the precast base layer block body (1-1-1), at the same time, the first screw rod (2-1-5) on the side surface of the adjacent bottom precast unit block body (2-1-1) is inserted into the first connecting hole (2-1-4) of the adjacent bottom precast unit block body (2-1-1) to realize horizontal preliminary positioning, and solid waste is filled into the first solid waste filling cavity (2-2); Step 3, installation of the water filtering connection structure: The water filtering connection frame (4-1) is placed between the first V-shaped groove (1-1-4) and the second V-shaped groove (2-1-7), and the water filtering connection frame (4-1) is fixed between the first layer bottom precast unit block (2-1) and the precast base layer block (1-1) through the first additional screw rod (1-1-5) and the second additional screw rod (2-1-8); Step 4, backfill and laying of the inverse filter layer: Install the steel grating (4-2) and the inverse filter layer (4-4) in the water filtration connecting frame (4-1), and then backfill and compact the soil body behind the wall; Step 5, installation of the remaining bottom layer prefabricated units and standard prefabricated units: Lift the standard prefabricated unit (3) to the top of the bottom layer prefabricated unit (2), and ensure that the second limiting groove (3-1-2) opened on the bottom surface of the standard prefabricated unit block (3-1-1) is accurately buckled on the second limiting rib (2-1-3) of the first layer bottom layer prefabricated unit (2), At the same time, ensure that the second screw rod (3-1-5) of the adjacent standard prefabricated unit block (3-1-1) is inserted into the second connecting hole (3-1-4), realize the horizontal connection with the adjacent standard prefabricated unit block (3-1-1) in the same layer, and fill the solid waste to the middle second solid waste filling cavity (3-2) area; If there is a need for height, the bottom layer prefabricated unit (2) and the standard prefabricated unit (3) can be stacked in sequence according to the above method; Step 6, grouting and solidification: Inject slurry downward through the first grouting hole (2-1-6) or the second grouting hole (3-1-6), fill the first connecting hole (2-1-4) and the second connecting hole (3-1-4) with the slurry, fill the gap between the first limiting groove (1-1-2) and the first limiting rib (2-1-2) with the slurry, fill the gap between the second limiting groove (3-1-2) and the second limiting rib (2-1-3) with the slurry, and fill the gap between the fixing groove and the third limiting rib (3-1-3) with the slurry, form a firm horizontal and vertical connection, and after the slurry reaches the designed strength, the detachable assembled concrete retaining wall structure has working performance.

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