CN115075289B - Rapid construction method for assembled arc ecological frame retaining wall - Google Patents
Rapid construction method for assembled arc ecological frame retaining wall Download PDFInfo
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- CN115075289B CN115075289B CN202210163605.7A CN202210163605A CN115075289B CN 115075289 B CN115075289 B CN 115075289B CN 202210163605 A CN202210163605 A CN 202210163605A CN 115075289 B CN115075289 B CN 115075289B
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- 238000010276 construction Methods 0.000 title claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004746 geotextile Substances 0.000 claims abstract description 41
- 239000002689 soil Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000004567 concrete Substances 0.000 claims description 33
- 230000002787 reinforcement Effects 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 238000011835 investigation Methods 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000012876 topography Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005056 compaction Methods 0.000 description 11
- 239000004744 fabric Substances 0.000 description 11
- 230000007547 defect Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0283—Retaining or protecting walls characterised by constructional features of mixed type
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- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Retaining Walls (AREA)
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Abstract
The application relates to a rapid construction method of an assembled arc ecological frame retaining wall, which relates to the field of retaining walls and comprises eight steps of prefabricating arc ecological frame components, constructing foundation and foundation, intercepting and changing a water flow route, assembling and hoisting an arc ecological frame, horizontally connecting and vertically connecting the arc ecological frame, backfilling the inside of the arc ecological frame, arranging geotextile and backfilling soil materials at the back of the arc ecological frame. The application has the effects of short construction period, small environmental impact in the construction process and less labor requirement.
Description
Technical Field
The application relates to the field of retaining walls, in particular to a rapid construction method of an assembled arc ecological frame retaining wall.
Background
In the related art, the retaining wall is constructed by adopting a cast-in-place concrete mode, but the construction method has the defects of long construction period, wide environmental impact in the construction process, large labor force requirement and the like, and cannot be well adapted to the development requirement.
In view of the above-mentioned related art, the inventor believes that the retaining wall construction method in the related art has the defects of long construction period, wide environmental impact in the construction process and large labor requirement.
Disclosure of Invention
The application provides a rapid construction method of an assembled arc ecological frame retaining wall, which aims to overcome the defects of long construction period, wide environmental impact in the construction process and large labor requirement of the retaining wall construction method.
The rapid construction method of the assembled arc ecological frame retaining wall provided by the application adopts the following technical scheme:
the rapid construction method of the assembled arc ecological frame retaining wall comprises the following steps:
prefabricating an arc ecological frame component: the method comprises the steps of performing size measurement according to actual landforms on site, drawing three-dimensional models of a bottom plate, an arc-shaped vertical plate and a side plate of an arc-shaped ecological frame by a computer according to a proportion, prefabricating the bottom plate, the arc-shaped vertical plate and the side plate of the arc-shaped ecological frame according to the drawn three-dimensional models, and arranging a vertical penetrating connecting groove in the side plate of the arc-shaped ecological frame;
foundation and foundation construction: performing soil investigation in a construction range, leveling a foundation according to the investigation result, pouring concrete to form a foundation, and pre-burying a group of steel bars at intervals on the foundation;
intercepting: intercepting water flow at the upstream of the construction range of the retaining wall, so that the retaining wall can be constructed in a dry state;
arc ecological frame equipment and hoist and mount: assembling the bottom plate, the arc-shaped vertical plates and the side plates into an arc-shaped ecological frame at a construction site; the arc ecological frame is carried out in a layered hoisting mode; firstly marking the placement positions of all arc ecological frames on a foundation, sequentially hoisting the arc ecological frames to the marked placement positions, completing hoisting of the arc ecological frames on the lower layer, after the arc ecological frames are correctly hoisted on the foundation, arranging embedded bars in connecting grooves of the arc ecological frames, sequentially hoisting the arc ecological frames on the upper layer, connecting the connecting grooves of two vertically adjacent arc ecological frames, and arranging the arc ecological frames on different layers in a staggered manner in the front-rear direction in sequence to form a layered stepped bidirectional joint arch retaining wall structure;
arc ecological frame horizontal connection and vertical connection: the method comprises the steps of firmly connecting two adjacent arc-shaped ecological frames by using bolts and nuts, installing a vertical reinforcement cage in a connecting groove, binding the reinforcement cage with embedded bars of a foundation, and pouring concrete into the connecting groove to form an integral retaining wall structure by the arc-shaped ecological frames;
backfilling the inside of the arc ecological frame: backfilling the inside of the arc ecological frame by using a backfilling material;
geotextile arrangement: adopting a scheme of two geotextiles, wherein the first geotextile is paved according to the stage shape of the back surface of the arc-shaped ecological frame, the second geotextile is paved closely to the arc-shaped ecological frame, the lower surface of the second geotextile is extended to the back surface of the reverse filtering layer by closely leaning against the concrete foundation, so as to form a second geotextile surface, and the reverse filtering layer is wrapped in the geotextile;
backfilling soil at the back of the arc ecological frame: immediately filling and compacting after the geotextile is paved, and adopting a construction process of layered backfilling and layered compacting, wherein the backfilling and the compacting are carried out along the longitudinal direction of the retaining wall.
By adopting the technical scheme, the application performs size measurement according to the actual site topography, a computer is used for drawing a three-dimensional model of a bottom plate, an arc-shaped vertical plate and a side plate, a factory prefabricates an arc-shaped ecological frame according to the drawn three-dimensional model, then the arc-shaped ecological frame is assembled and hoisted at a construction site, the construction efficiency is effectively improved, after the arc-shaped ecological frame is hoisted, the arc-shaped ecological frames which are horizontally adjacent after being hoisted are connected by adopting horizontal bolts, and the arc-shaped ecological frames which are vertically adjacent after being hoisted are connected by adopting a vertical cast-in-situ reinforced concrete connection mode, so that the integrity of a retaining wall structure is improved through horizontal and vertical connection; the assembled arc ecological frame retaining wall adopts a scheme of two geotextiles, wherein the geotextiles are paved according to the stage shape of the back surface of a product in the first step, the geotextiles are paved closely to the ecological frame in the second step, the lower surface of the geotextile is extended to the back of the reverse filtering layer by leaning against the concrete bottom plate, and the reverse filtering layer is wrapped in the geotextile; the construction method of the application greatly reduces construction waste on a construction site, has no sediment, masonry and dust on the site, greatly improves construction noise pollution, simultaneously reduces labor cost, reduces labor daily number by 60-80% compared with the traditional mode, and effectively improves the defects of long construction period, wide environmental impact in construction process and large labor force requirement of the retaining wall.
Preferably, the bottom plate, the arc vertical plate and the side plate of the prefabricated arc ecological frame are numbered in the process of prefabricating the bottom plate, the arc vertical plate and the side plate, and the bottom plate, the arc vertical plate and the side plate of the arc ecological frame are assembled into the arc ecological frame according to the number.
Through adopting above-mentioned technical scheme, the accuracy of connection between the arc ecological frame can be improved to the serial number, eliminates size error when design drawing and scene typesetting are arranged, makes it accord with the whole deviation requirement of installation, ensures construction quality.
Preferably, the lower part of the side plate of the arc-shaped ecological frame is provided with a connecting port which is convenient for connecting the reinforcement cage to the embedded bars on the foundation, two ends of the connecting port are respectively communicated with the connecting groove and the inner frame of the arc-shaped ecological frame, and before concrete is poured into the connecting groove, the connecting port is required to be sealed by using a template, and the side surface of the template is clung to the inner wall of the side plate.
By adopting the technical scheme, the hands of the staff extend into the connecting ports, and the reinforcement cage is bound to the embedded bars, so that the operation is convenient; the side of template is hugged closely with the inner wall of curb plate can make the concrete of pouring into the spread groove enter into the connector, forms spacingly to the ecological frame of arc, improves the fastness of the ecological frame of arc.
Preferably, in the hoisting process of the arc-shaped ecological frame, if a gap exists between the concrete surface of the foundation and the arc-shaped ecological frame, mortar is used for paving the concrete surface of the foundation to be smooth, so that the concrete surface of the foundation and the arc-shaped ecological frame are tightly attached.
By adopting the technical scheme, the condition that backfill at the back of the arc-shaped ecological frame runs off from a gap between the concrete surface of the foundation and the arc-shaped ecological frame can be reduced.
Preferably, the backfilling material is cobble with the grain diameter of 150-200mm, soil and sand are scattered on the backfilled cobble, and the cobble starts to be filled from the lower position inside the arc ecological frame.
By adopting the technical scheme, the soil and sand fills the gaps of the cobbles, a favorable growth environment is provided for vegetation, filling is started from the lower position inside the arc-shaped ecological frame, and the impact of the cobbles on the arc-shaped ecological frame can be reduced.
Preferably, the geotextile is pressed by a sand bag in the laying process, and the sand bag is reserved on the laying surface.
By adopting the technical scheme, due to the nature of geotechnical cloth, the allowance of expansion deformation can be reserved when the geotechnical cloth is laid, and the geotechnical cloth can be prevented from automatically shrinking by pressing with the sand bag.
Preferably, the geotextile is superimposed with the upstream geotextile thereon and is superimposed more than 10 cm.
By adopting the technical scheme, the upstream geotechnical cloth can avoid that the permeated water rushes open the overlapping part of the geotechnical cloth.
Preferably, the back soil backfilling of the arc ecological frame is uniformly spread to the first and the tail of the grille to fix the geogrid, and then the middle part is distributed; the thickness of each layer of filling soil is 15cm to 20cm, the soil material is one or more of silt, silt clay and clay silt which are required by design, and the maximum particle size of the soil material is not more than 50mm.
Through adopting above-mentioned technical scheme, the too big soil material particle diameter can cause the soil material to leave too much between the soil material to backfill is not firm, and the settlement takes place easily in later stage.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the construction method, the horizontally adjacent arc-shaped ecological frames after hoisting are connected through the horizontal bolts, the vertically adjacent arc-shaped ecological frames after hoisting are connected through a vertical cast-in-situ reinforced concrete connection mode, and the integrity of the retaining wall structure is improved through the horizontal and vertical connection; the construction waste on the construction site is greatly reduced in a mode of prefabricating the ecological frame, the site is free of sediment, masonry and dust, the construction noise pollution is greatly improved, meanwhile, the labor cost is reduced, the number of workers and days is reduced by 60% -80% compared with that of the traditional mode, and the defects of long construction period of the retaining wall, wide environmental influence in the construction process and large labor requirement are effectively overcome;
2. the lower part of the side plate of the arc ecological frame is provided with a connecting port, the connecting port is required to be closed by using a template before concrete is poured into the connecting groove, the side surface of the template is clung to the inner wall of the side plate, hands of staff extend into the connecting port, and the reinforcement cage is bound to the embedded reinforcement, so that the operation is convenient; the side of template is hugged closely with the inner wall of curb plate can make the concrete of pouring into the spread groove enter into the connector, forms spacingly to the ecological frame of arc, improves the fastness of the ecological frame of arc.
Drawings
Fig. 1 is a flowchart of a rapid construction method of an assembled arc-shaped ecological frame retaining wall according to an embodiment of the present application.
Fig. 2 is a schematic view of hoisting an arc-shaped ecological frame according to an embodiment of the present application.
Fig. 3 is a schematic structural view of an arc-shaped ecological frame according to an embodiment of the present application.
Reference numerals illustrate: 1. an arc ecological frame; 11. a bottom plate; 12. an arc-shaped vertical plate; 13. a side plate; 14. a connecting groove; 15. a connection port; 16. a mounting hole; 2. a foundation.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a rapid construction method of an assembled arc ecological frame retaining wall. Referring to fig. 1, 2 and 3, the rapid construction method of the fabricated arc-shaped ecological frame retaining wall comprises the following steps:
prefabricated arc ecological frame 1 component: the method comprises the steps of performing size measurement according to the actual landform on site, drawing three-dimensional models of a bottom plate 11, an arc vertical plate 12 and a side plate 13 of the arc ecological frame 1 by a computer according to the proportion, prefabricating the bottom plate 11, the arc vertical plate 12 and the side plate 13 of the arc ecological frame 1 according to the drawn three-dimensional models, respectively setting unified standards for the sizes of each bottom plate 11, each arc vertical plate 12 and each side plate 13, and numbering the bottom plate 11, the arc vertical plate 12 and the side plate 13 by using the computer models. The bottom plate 11, the arc-shaped vertical plates 12 and the side plates 13 are respectively provided with anchor bolt holes which can be matched in pairs, the side plates 13 are internally provided with connecting grooves 14 which vertically penetrate, the front ends and the rear ends of the side plates 13 of the arc-shaped ecological frame 1 are respectively provided with horizontal mounting holes 16, the left side and the right side of the bottom plate 11 are respectively provided with steps, and the steps on the left side of one bottom plate 11 are overlapped with the steps on the right side of the other bottom plate 11. After the arc ecological frame 1 component is produced, detail inspection and assembly scheme inspection are required, the produced 0 # prefabricated components and 1 # prefabricated components of the bottom plate 11, the arc vertical plate 12 and the side plate 13 are required to be respectively compared with a designed model, two different components are fixed through anchor holes of two different components, the two different components are preassembled through anchor bolts, so that problems are found, the prefabricated arc ecological frame 1 can be optimized in time, gaps between the anchor bolts and the anchor bolt holes are required to be inspected, assembly difficulty of the anchor bolts and the anchor bolt holes is avoided due to manufacturing errors, and if the gaps are overlarge, the sizes of the anchor holes are adjusted in time to optimize. The front side of the arc-shaped vertical plate 12 can be designed with a certain decorative pattern for beautification. And (3) carrying out water spraying maintenance on the finished prefabricated part, wherein the maintenance time is 7 days, partial sampling detection is carried out after the strength reaches the design requirement, and the next construction is carried out on a transportation site after the quality is qualified.
Foundation and foundation 2 construction: and (3) performing soil investigation in a construction range, wherein the soil investigation comprises topography, soil constitution, soil parameters and the like, constructing a foundation of the assembled arc ecological retaining wall according to the investigation result, wherein the foundation of the assembled arc ecological retaining wall is the same as a common foundation, then leveling the foundation and pouring concrete to form a foundation 2, and embedding a group of steel bars on the foundation 2 at intervals. If the foundation is not good, in order to avoid uneven settlement, proper foundation 2 form and construction method must be selected to ensure that the settlement value of the assembled arc ecological retaining wall meets the requirements.
Intercepting: and intercepting water flow at the upstream of the construction range of the retaining wall, so that the retaining wall can be constructed in a dry state. The embodiment adopts a siphon pipe to cut off, and the method comprises the following steps: digging a river crossing intercepting groove at the upstream of the construction range of the retaining wall, digging a river crossing water storage groove at the downstream of the construction range of the retaining wall, wherein the upper part of the water storage groove is higher than the bottom of the intercepting groove, the height difference between the upper part of the water storage groove and the bottom of the intercepting groove is 2m, a plurality of water pipes are distributed in the river of the construction range section of the retaining wall, the total water flow of the water pipes is larger than that of the river, one end of each water pipe is arranged in the intercepting groove and lower than the upper part of the water storage groove, and the other end of each water pipe is arranged in the water storage groove, so that the water pipes can generate a siphon effect for a long time. When the water shutoff is started, the water pump is firstly used for pumping water to the water pipe, the water pump is then turned off, the water pipe generates a siphon effect due to the fact that the height difference exists at two ends of the water pipe, water in the water shutoff groove is pumped into the water storage groove by the water pipe and is discharged from the downstream of the construction range of the retaining wall, water in the upstream of the construction range of the retaining wall flows into the water shutoff groove to supplement the pumped water, water in the river in the construction range of the retaining wall continuously flows to the downstream, and the water quantity in the river in the construction range of the retaining wall is reduced. Because the water flow sum of the water pipes is larger than the water flow of the river, after a period of time, the water flow of the river at the construction range section of the retaining wall is drained, and the interception of the river is completed. According to the method for intercepting the river, soil filling interception is not needed, so that the construction difficulty is greatly reduced, the construction cost is reduced, the construction period is shortened, the influence of construction on the environment is small, the ecological environment can be protected to the greatest extent, and energy conservation and environmental protection are realized. In addition, proper measures are required to cope with the sudden water outlet condition. And (3) excavating earthwork after the closure is successful, wherein in the occasion of excavating the earth with the depth of more than 1.5 meters, adopting a fence construction method for preventing the dam from collapsing, and taking the factors such as the width drilling depth of an excavating groove, the extension of one-time construction, groundwater, spring water, surrounding environment and the like into consideration during construction. And determining the excavation width of the revetment construction range by comparing the planning diagram. The medium and small river should be careful about the situation that the water is suddenly discharged when the section of the running water is not rich. So that overdraining is not recommended or superfluous mining is not performed as much as possible. The following points are noted during excavation: (1) The excavator cannot dig below a construction reference surface during digging; (2) The influence of noise, vibration and the like of the excavator on surrounding areas is considered when the excavator is selected; (3) When the water flow cannot be stopped, a submersible pump or the like is used to ensure that the construction is performed in a dry state; (4) When there is a pipeline in the ground, the position is checked, the periphery is manually excavated, and necessary measures are taken to the exposed pipeline to avoid damage.
Arc ecological frame 1 equipment and hoist and mount: in the construction site, a bottom plate 11, two arc-shaped vertical plates 12 and two side plates 13 are assembled into an arc-shaped ecological frame 1 in a matched mode, the two arc-shaped vertical plates 12 and the two side plates 13 are all arranged above the bottom plate 11, the two arc-shaped vertical plates 12 are respectively arranged on the front side and the rear side of the bottom plate 11, and the two side plates 13 are respectively arranged on the left side and the right side of the bottom plate 11. The assembly is carried out by checking the number, so that the accuracy of the bolt connection of the retaining wall of the assembled arc ecological frame 1 is improved. After the arc-shaped ecological frame 1 is assembled, the assembled gaps are required to be sealed by using concrete on the joint surfaces of the bottom plate 11, the arc-shaped vertical plates 12 and the side plates 13 so as to avoid the invasion of harmful water. After the assembly is completed, hoisting is carried out, the arc ecological frame 1 is hoisted in a layered manner, and the hoisting process is as follows: firstly marking the placement positions of the arc ecological frames 1 on the foundation 2, then hoisting the arc ecological frames 1 to the marked placement positions in sequence, mutually overlapping steps of the bottom plates 11 of the left and right adjacent arc ecological frames 1 to ensure the integrity between retaining wall units, completing the hoisting of the arc ecological frames 1 on the lower layer, and arranging embedded bars in the connecting grooves 14 of the arc ecological frames 1 after the arc ecological frames 1 are correctly hoisted to the foundation 2.
Arc ecological frame 1 horizontal connection: the two adjacent arc ecological frames 1 are firmly connected through a set of fasteners, the two adjacent arc ecological frames 1 are horizontally connected through connecting bolts, one set of fasteners comprises an M10 bolt, two gaskets and a nut, and the two adjacent arc ecological frames 1 are connected to the light fastening degree through a spanner and the like by penetrating one bolt through the mounting hole 16 and then mounting the nut on the bolt.
Backfilling the inside of the arc ecological frame 1: backfilling the inside of the arc-shaped ecological frame 1 by using a backfilling material.
The steps of assembling and hoisting the arc-shaped ecological frames 1, horizontally connecting the arc-shaped ecological frames 1 and backfilling the inside of the arc-shaped ecological frames 1 are repeated in sequence, the arc-shaped ecological frames 1 are hoisted upwards layer by layer just like building blocks are built, one block is used for arranging the arc-shaped ecological frames 1, the connecting grooves 14 of the two vertically adjacent arc-shaped ecological frames 1 are communicated, and the arc-shaped ecological frames 1 of different layers are arranged in a staggered mode in the front-back direction in sequence to form a layered stepped two-way joint arch retaining wall structure. The hoisting of each layer of arc ecological frame 1 is sequentially constructed from downstream to upstream. After all the arc ecological frames 1 are hoisted, the arc ecological frames 1 are vertically connected, namely, a vertical reinforcement cage is installed in the connecting groove 14, the reinforcement cage is bound with embedded bars of the foundation 2, and then concrete is poured into the connecting groove 14, so that the arc ecological frames 1 form an integral retaining wall structure.
Geotextile arrangement: by adopting the scheme of two geotextiles, the first geotextile is paved according to the stage shape of the back surface of the arc-shaped ecological frame 1, the geotextile is overlapped by the upstream geotextile and is overlapped by more than 10cm, and the first geotextile is paved after the inside backfilling of the arc-shaped ecological frame 1 of one layer is completed each time. The second geotechnical cloth is tightly paved on the arc-shaped ecological frame 1, the lower surface of the second geotechnical cloth is tightly abutted on the concrete foundation 2 and extends to the back of the back filtering layer, the second geotechnical surface is formed, and the back filtering layer is wrapped in the geotechnical cloth.
Backfilling soil at the back of the arc ecological frame 1: immediately filling and compacting after the geotextile is paved, and adopting a construction process of layered backfilling and layered compacting, wherein the backfilling and the compacting are carried out along the longitudinal direction of the retaining wall. During filling, vehicles are not allowed to walk on the unreacted reinforcement, backfill materials are stacked outside the tail part of the grille, and then the materials are uniformly distributed by adopting a mini excavator. The backfill soil is uniformly spread to the head and tail parts of the grids to fix the geogrid, and then is distributed to the middle part; the thickness of each layer of filling soil is 15cm to 20cm, the soil material is one or more of silt, silt clay and clay silt which are required by design, and the maximum particle size of the soil material is not more than 50mm. In compaction, small frog compaction is adopted, compaction is not needed by a road roller, an excavator or a digger, compaction construction is carried out by adopting a back-off method, the compaction is mutually overlapped, missing compaction is prevented, the compaction pass number is measured according to a test, the compaction degree is more than 90%, compaction degree detection is needed after each layer of backfill soil is compacted, and the frequency meets the standard requirement.
Before hoisting the arc-shaped ecological frame 1, checking the height and completion condition of the concrete of the foundation 2 and confirming whether the solidification time of the concrete reaches the standard, and in addition, confirming the setting position of the crane or the excavator according to the current condition, and selecting the corresponding working radius. In addition, the safety inspection is sufficiently performed on the metal parts for hoisting, the wire ropes and the like, the metal parts for hoisting must be special parts, and workers do not need to monitor under the hoisting arc-shaped ecological frame 1 during hoisting operation. In the hoisting process of the arc-shaped ecological frame 1, if a gap exists between the concrete surface of the foundation 2 and the arc-shaped ecological frame 1, mortar is used for paving the concrete surface of the foundation 2 to be smooth, so that the concrete surface of the foundation 2 is tightly attached to the arc-shaped ecological frame 1, and the fact that no foreign matters such as concrete burrs or mud exist in the mounting holes 16 must be confirmed.
The lower part of the side plate 13 of the arc-shaped ecological frame 1 is provided with a connecting port 15 which is convenient for connecting the reinforcement cage to the embedded bars on the foundation 2, two ends of the connecting port 15 are respectively communicated with the connecting groove 14 and the inner frame of the arc-shaped ecological frame 1, and before concrete is poured into the connecting groove 14, the connecting port 15 needs to be closed by using a template, and the side surface of the template is clung to the inner wall of the side plate 13. The hands of the staff extend into the connecting ports 15 to bind the reinforcement cage to the embedded bars, so that the operation is convenient; the side of template is hugged closely with the inner wall of curb plate 13 can make the concrete of pouring into spread groove 14 enter into connector 15, forms spacingly to arc ecological frame 1, improves the fastness of arc ecological frame 1.
The backfill material is cobble with the grain diameter of 150-200mm, soil and sand are scattered on the backfill cobble, and the soil and sand fills gaps of the cobble, so that a favorable growth environment is provided for vegetation. The cobble starts to be filled from the lower position inside the arc-shaped ecological frame 1, so that the impact of the cobble on the arc-shaped ecological frame 1 can be reduced.
Immediately after the geotextile is laid, filling and compacting are carried out, and the exposure time is not longer than 48 hours. The construction technology of layered backfilling and layered compaction is adopted, the backfilling and the compaction are all carried out along the longitudinal direction of the retaining wall, and the backfilling is strictly forbidden to be carried out by tiling from a slope to the direction of the retaining wall. The geotechnical cloth is pressed by the sand bags in the laying process, the sand bags are reserved on the laying surface, and the geotechnical cloth can be prevented from automatically shrinking by pressing the geotechnical cloth by the sand bags.
The implementation principle of the rapid construction method of the assembled arc ecological frame retaining wall provided by the embodiment of the application is as follows: according to the application, the dimension measurement is carried out according to the actual site topography, a computer is used for drawing a three-dimensional model of the bottom plate 11, the arc-shaped vertical plates 12 and the side plates 13, a factory prefabricates the arc-shaped ecological frame 1 components according to the drawn three-dimensional model, then the arc-shaped ecological frame 1 is assembled and hoisted at a construction site, the construction efficiency is effectively improved, after the arc-shaped ecological frame 1 is hoisted, the arc-shaped ecological frames 1 which are horizontally adjacent after the hoisting are connected by adopting horizontal bolts, the arc-shaped ecological frames 1 which are vertically adjacent after the hoisting are connected by adopting a connection mode of vertical cast-in-situ reinforced concrete, and the integrity of a retaining wall structure is improved by the connection of the horizontal and vertical directions; the scheme of two geotextiles is adopted for the assembled arc-shaped ecological frame 1 retaining wall, the geotextiles are paved according to the stage shape of the back surface of a product in the first step, the geotextiles are paved closely to the ecological frame in the second step, the lower surface of the geotextile is tightly extended to the back of the inverted filter layer by the concrete bottom plate 11, and the inverted filter layer is wrapped in the geotextile; the construction method of the application greatly reduces construction waste on a construction site, has no sediment, masonry and dust on the site, greatly improves construction noise pollution, simultaneously reduces labor cost, reduces labor daily number by 60-80% compared with the traditional mode, and effectively improves the defects of long construction period, wide environmental impact in construction process and large labor force requirement of the retaining wall.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (6)
1. The rapid construction method of the assembled arc ecological frame retaining wall is characterized by comprising the following steps of:
prefabricating an arc ecological frame (1) component: according to the on-site actual topography, dimension measurement is carried out, a computer is used for drawing three-dimensional models of a bottom plate (11), an arc vertical plate (12) and a side plate (13) of the arc ecological frame (1) according to the proportion, then the bottom plate (11), the arc vertical plate (12) and the side plate (13) of the arc ecological frame (1) are prefabricated according to the drawn three-dimensional models, and a vertical penetrating connecting groove (14) is formed in the side plate (13) of the arc ecological frame (1);
foundation and foundation (2) construction: performing soil investigation within a construction range, leveling a foundation according to the investigation result, pouring concrete to form a foundation (2), and embedding a group of steel bars on the foundation (2) at intervals;
intercepting: intercepting water flow at the upstream of the construction range of the retaining wall, so that the retaining wall can be constructed in a dry state;
assembling and hoisting the arc ecological frame (1): in a construction site, assembling a bottom plate (11), an arc-shaped vertical plate (12) and side plates (13) into an arc-shaped ecological frame (1); the arc ecological frame (1) is lifted in a layered manner; firstly marking the placement positions of all arc ecological frames (1) on a foundation (2), hoisting the arc ecological frames (1) to the marked placement positions in sequence, completing hoisting of the lower arc ecological frames (1), after the arc ecological frames (1) are correctly hoisted to the foundation (2), arranging embedded bars in connecting grooves (14) of the arc ecological frames (1), then hoisting the arc ecological frames (1) of one layer in sequence, connecting the connecting grooves (14) of two vertically adjacent arc ecological frames (1), and arranging the arc ecological frames (1) of different layers in a staggered mode in the front-rear direction in sequence to form a layered stepped bidirectional arch retaining wall structure;
arc ecological frame (1) horizontal connection and vertical connection: the two adjacent arc ecological frames (1) are firmly connected by using bolts and nuts, a vertical reinforcement cage is arranged in the connecting groove (14), the reinforcement cage is bound with embedded bars of the foundation (2), and then concrete is poured into the connecting groove (14), so that each arc ecological frame (1) forms an integral retaining wall structure;
backfilling the inside of the arc ecological frame (1): backfilling the inside of the arc ecological frame (1) by using a backfilling material;
geotextile arrangement: adopting a scheme of two geotextiles, wherein the first geotextile is paved according to the stage shape of the back surface of the arc-shaped ecological frame (1), the second geotextile is paved closely to the arc-shaped ecological frame (1), the lower surface of the second geotextile is extended to the back of the reverse filtering layer by closely leaning against the concrete foundation (2), so as to form a second geotextile surface, and the reverse filtering layer is wrapped in the geotextile;
backfilling soil at the back of the arc ecological frame (1): immediately filling and compacting after the geotextile is paved, and adopting a construction process of layered backfilling and layered compacting, wherein the backfilling and the compacting are carried out along the longitudinal direction of the retaining wall;
the lower part of a side plate (13) of the arc-shaped ecological frame (1) is provided with a connecting port (15) which is convenient for connecting a reinforcement cage to an embedded reinforcement on a foundation (2), two ends of the connecting port (15) are respectively communicated with a connecting groove (14) and an inner frame of the arc-shaped ecological frame (1), before concrete is poured into the connecting groove (14), the connecting port (15) needs to be sealed by using a template, and the side surface of the template is tightly attached to the inner wall of the side plate (13);
and pressing by adopting a sand bag in the geotextile laying process, and keeping the sand bag on a laying surface.
2. The rapid construction method of the assembled arc ecological frame retaining wall according to claim 1, wherein the rapid construction method comprises the following steps: the method comprises the steps of prefabricating a bottom plate (11), an arc-shaped vertical plate (12) and a side plate (13), numbering the bottom plate (11), the arc-shaped vertical plate (12) and the side plate (13) in the process of prefabricating the bottom plate (11), the arc-shaped vertical plate (12) and the side plate (13), and assembling the bottom plate (11), the arc-shaped vertical plate (12) and the side plate (13) into an arc-shaped ecological frame (1) according to the numbering.
3. The rapid construction method of the assembled arc ecological frame retaining wall according to claim 1, wherein the rapid construction method comprises the following steps: in the hoisting process of the arc-shaped ecological frame (1), if a gap exists between the concrete surface of the foundation (2) and the arc-shaped ecological frame (1), mortar is used for paving the concrete surface of the foundation (2) to be smooth, so that the concrete surface of the foundation (2) is tightly attached to the arc-shaped ecological frame (1).
4. The rapid construction method of the assembled arc ecological frame retaining wall according to claim 1, wherein the rapid construction method comprises the following steps: the backfilling material is cobble with the grain diameter of 150-200mm, soil and sand are scattered on the backfilled cobble, and the cobble starts to be filled from the lower position inside the arc ecological frame (1).
5. The rapid construction method of the assembled arc ecological frame retaining wall according to claim 1, wherein the rapid construction method comprises the following steps: the geotextile is superimposed with the upstream geotextile thereon and is doubled by more than 10 cm.
6. The rapid construction method of the assembled arc ecological frame retaining wall according to claim 1, wherein the rapid construction method comprises the following steps: the back soil backfilling of the arc ecological frame (1) is uniformly spread to the head and tail parts of the grids to fix the geogrid, and then the middle part is distributed; the thickness of each layer of filling soil is 15cm to 20cm, the soil material is one or more of silt, silt clay and clay silt which are required by design, and the maximum particle size of the soil material is not more than 50mm.
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