CN111411637A - High and steep terrain foam concrete light embankment structure and construction method - Google Patents
High and steep terrain foam concrete light embankment structure and construction method Download PDFInfo
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- CN111411637A CN111411637A CN202010363699.3A CN202010363699A CN111411637A CN 111411637 A CN111411637 A CN 111411637A CN 202010363699 A CN202010363699 A CN 202010363699A CN 111411637 A CN111411637 A CN 111411637A
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 106
- 238000010276 construction Methods 0.000 title claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 144
- 239000010959 steel Substances 0.000 claims abstract description 144
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 86
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 47
- 239000004567 concrete Substances 0.000 claims abstract description 41
- 239000004575 stone Substances 0.000 claims abstract description 34
- 230000002787 reinforcement Effects 0.000 claims abstract description 16
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 238000012876 topography Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 239000010426 asphalt Substances 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011376 self-consolidating concrete Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007569 slipcasting Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 235000014121 butter Nutrition 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 244000050510 Cunninghamia lanceolata Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
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- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
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Abstract
The invention relates to a high and steep topography foam concrete light embankment structure, which comprises prestressed steel bundles, anti-sliding anchors, anchor piles, anti-overturning piles, stone concrete guard feet, a prefabricated reinforced concrete retaining wall, prestressed anchor cables, prefabricated guardrails and an integral reinforcing mesh; the transverse slope and the longitudinal slope of the high and steep terrain are provided with reverse-inclined steps, anti-skid anchors are arranged at the steps, and the surface of the steps is provided with shallow grouting reinforcement bodies; a foam concrete embankment is poured above the steps, and is provided with parting joints in the transverse direction and the longitudinal direction, and the parting joints are arranged in the middle of each step; the parting steel plate is filled in the parting. The invention has the beneficial effects that: high steep topography transverse slope and longitudinal slope set up the back dip step, resist the transverse slope through the step and slide and the longitudinal slope problem of sliding, step department sets up anti-skidding anchor, improves the sliding resistance of contact surface, and step department earth's surface sets up shallow grouting reinforcement body, improves shallow earth's surface intensity through the slip casting, prevents to slide along the shallow layer of earth's surface to improve anti-skidding anchor's anchoring power.
Description
Technical Field
The invention relates to an embankment structure, in particular to a high and steep terrain foam concrete light embankment structure and a construction method.
Background
The contact surface of the foam concrete embankment in the high and steep terrain has the problem of slippage due to the steep terrain; the high and steep terrain longitudinal slope and transverse slope are steep, the thickness of the foam concrete embankment is uneven in the transverse direction and the longitudinal direction, so that the problem of uneven settlement of the foundation is prominent, and in addition, the problem of integral overturning of the embankment is easy to occur due to light weight of the foam concrete, high embankment and steep terrain. The prior art foam concrete embankment patent does not solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a foam concrete light embankment structure suitable for high and steep terrains, capable of adapting to uneven settlement and preventing the embankment from slipping with the earth surface interface and strong in anti-overturning capacity and a construction method thereof.
The high and steep topography foam concrete light embankment structure comprises prestressed steel bundles, anti-sliding anchors, anchor piles, anti-overturning piles, stone concrete guard feet, a prefabricated reinforced concrete retaining wall, prestressed anchor cables, prefabricated guardrails and an integral reinforcing mesh; the transverse slope and the longitudinal slope of the high and steep terrain are provided with reverse-inclined steps, anti-skid anchors are arranged at the steps, and the surface of the steps is provided with shallow grouting reinforcement bodies; a foam concrete embankment is poured above the steps, and is provided with parting joints in the transverse direction and the longitudinal direction, and the parting joints are arranged in the middle of each step; a parting steel plate is filled in the parting, and dowel bars are arranged between each adjacent block of the foam concrete embankment divided by the parting area; the foam concrete embankment is provided with a multi-stage prefabricated reinforced concrete retaining wall on one side of the slope bottom of the high and steep terrain, the outer side of the prefabricated reinforced concrete retaining wall is provided with a counterfort, the bottom of the first-stage prefabricated reinforced concrete retaining wall is provided with a stone concrete toe guard, the bottom of the stone concrete toe guard is provided with an anti-overturning pile, and the pile top of the anti-overturning pile is embedded in the stone concrete and is connected with the retaining wall bottom plate of the first-stage prefabricated reinforced concrete retaining wall through a prestressed anchor cable; the top of the wall body of the first-stage prefabricated reinforced concrete retaining wall is connected with the retaining wall bottom plate of the second-stage prefabricated reinforced concrete retaining wall through a prestressed anchor cable, and the wall body of the prefabricated reinforced concrete retaining wall is provided with prestressed steel beams which penetrate through the foam concrete embankment and are fixed on the anchor pile; a deformed steel plate is laid at the parting position of the top of the foam concrete embankment and fixed on the foam concrete through fixing nails, an integral type reinforcing mesh is laid at the top of the foam concrete embankment, a pavement structure layer is laid above the integral type reinforcing mesh, and prefabricated guardrails are installed at the top of a retaining wall at the edge of the foam concrete embankment.
Preferably, the method comprises the following steps: the grouting reinforcement body is arranged in the depth range of 2-3m along the ground surface, and the cross section and the longitudinal section of the grouting reinforcement body are step-shaped.
Preferably, the method comprises the following steps: the steel sheet of dividing seam includes riser, dividing seam steel sheet bottom plate and triangle floor, and the riser is long bar-type texture, and the bottom of riser sets up the dividing seam steel sheet bottom plate of rectangular shape, and the both sides of riser set up the triangle floor, and it has the anchor hole to reserve on the dividing seam steel sheet bottom plate, and lubricating oil has been paintd to the riser one side, and another side pastes one deck pitch china fir board.
Preferably, the method comprises the following steps: the lower layer of reinforcing mesh, the middle layer of reinforcing mesh and the upper layer of reinforcing mesh are arranged in the foam concrete embankment, and the reinforcing mesh is reversely inserted into the foam concrete through u-shaped reinforcing bars to be fixed.
Preferably, the method comprises the following steps: the prefabricated reinforced concrete retaining wall is a buttress retaining wall, the buttress is arranged on the outer side of the prefabricated reinforced concrete retaining wall, prestressed anchor cable holes are preset in a retaining wall bottom plate, and prestressed anchor cables are pre-buried in the top of a wall body.
Preferably, the method comprises the following steps: the anti-overturning pile and the anchor pile are both steel pipe concrete piles, and a prestressed anchor cable is pre-buried at the pile top of the anti-overturning pile.
Preferably, the method comprises the following steps: one end of the dowel bar is fixed in the straight thread sleeve, the other end of the dowel bar extends into the sleeve, the straight thread sleeve is directly welded on the parting steel plate, and the sleeve is fixed on the parting steel plate through the supporting rib.
Preferably, the method comprises the following steps: the deformed steel plate is of a strip-shaped structure and consists of flanges and bulges, the cross section of the deformed steel plate is butterfly-shaped, and the bulges are arranged at the parting positions.
Preferably, the method comprises the following steps: and anchor cable holes are reserved in the bottom plate of the prefabricated guardrail.
Preferably, the method comprises the following steps: and a graded broken stone cushion layer and a cast-in-place concrete slab are laid on the inner side of the stone concrete guard foot.
Preferably, the method comprises the following steps: the anchor bolts are threaded steel bars.
Preferably, the method comprises the following steps: the inverted step is formed by inclining the surface of the step to the inner side of the foundation by a certain angle; and laying permeable geotextile on the surface of the inverted step.
The construction method of the high and steep topography foam concrete light embankment structure comprises the following construction steps:
1) excavating transverse steps and longitudinal steps on the ground surface of the steep slope terrain, wherein the steps are excavated in an inverted-inclined shape, namely the surfaces of the steps incline to the inner side of a foundation by a certain angle;
2) uniformly drilling grouting holes in the step, inserting grouting pipes, and injecting cement slurry through a grouting pump to perform grouting reinforcement on the shallow layer of the step surface;
3) constructing anchor piles and anti-overturning piles: drilling holes at the pile positions of an anchor pile and an anti-overturning pile, inserting a steel pipe, placing a steel reinforcement cage in the steel pipe and pouring self-compacting concrete, and pre-burying a prestressed anchor cable at the top of the anti-overturning pile;
4) the prefabricated reinforced concrete retaining wall with the buttress is prefabricated on site, a prestressed anchor cable hole is reserved on a retaining wall bottom plate, and a prestressed anchor cable is pre-buried at the top of a wall body;
5) pouring a stone concrete toe guard at the top of the anti-overturning pile, laying a graded broken stone cushion layer and a cast-in-place concrete slab on a first step at the inner side of the stone concrete toe guard, hoisting a first-stage prefabricated reinforced concrete retaining wall at the top of the stone concrete toe guard, and anchoring a pre-stressed anchor cable reserved in the anti-overturning pile on a retaining wall bottom plate of the first-stage prefabricated reinforced concrete retaining wall by using an anchorage device after pre-stressing the retaining wall bottom plate;
6) welding a parting steel plate bottom plate at the bottom of a vertical plate, welding triangular rib plates at two sides of the vertical plate, drilling a force transmission rod hole on the vertical plate, welding a straight threaded sleeve at one side of the force transmission rod hole, screwing one end of a force transmission rod into the straight threaded sleeve, sleeving a sleeve at the other end of the force transmission rod, welding the bottom of the sleeve on the vertical plate through a support rib, drilling a prestressed steel beam hole at the position where a prestressed steel beam passes on the vertical plate, and manufacturing to form a parting steel plate;
7) placing the parting steel plate along the parting position and fixing the parting steel plate by using an anchor nail, smearing butter on one surface of a vertical plate, and pasting a layer of asphalt fir plate on the other surface;
8) mounting a prestressed steel beam on the wall body of the first-stage prefabricated reinforced concrete retaining wall, penetrating the prestressed steel beam through prestressed steel beam holes in the parting steel plates, fixing the prestressed steel beam on the anchor pile and applying prestress;
9) pouring foam concrete in a block which is formed by mutually enclosing the parting steel plates and the first-stage prefabricated reinforced concrete retaining wall, and laying a reinforcing mesh at the designed height of the reinforcing mesh and fixing the reinforcing mesh by using u-shaped reinforcing steel bars when pouring the foam concrete;
10) hoisting a second-stage prefabricated reinforced concrete retaining wall at the top of the first-stage prefabricated reinforced concrete retaining wall, and enabling a prestressed anchor cable at the top of the first-stage prefabricated reinforced concrete retaining wall to penetrate through a retaining wall bottom plate of the second-stage prefabricated reinforced concrete retaining wall, anchoring and applying prestress;
11) setting up parting steel plates at the parting positions of the foam concrete and fixing the parting steel plates by using rivets, mounting prestressed steel beams on the wall body of the second-stage prefabricated reinforced concrete retaining wall, penetrating the prestressed steel beams through the parting steel plates to be fixed on anchor piles and applying prestress;
12) pouring foam concrete in a block which is formed by mutually enclosing the parting steel plates and the second-stage prefabricated reinforced concrete retaining wall, and laying a reinforcing mesh at the designed height of the reinforcing mesh and fixing the reinforcing mesh by using u-shaped reinforcing steel bars when pouring the foam concrete;
13) repeating the steps 10) to 12) until the designed foam concrete pouring elevation is reached;
14) embedding a deformed steel plate in a joint at the top of the foam concrete embankment before the foam concrete is hardened, embedding bulges of the deformed steel plate into the joint, embedding the foam concrete into the two flanges, and driving fixing nails to fix the flanges;
15) laying an integral type steel bar mesh on the top of the foam concrete embankment, and fixing the integral type steel bar mesh in the foam concrete through anchoring bolts;
16) paving anti-seepage geotextile on the step slope on the other side opposite to the prefabricated reinforced concrete retaining wall and filling edge-covering soil;
17) mounting a prefabricated guardrail, wherein a bottom plate of the prefabricated guardrail is fixed at the top of the prefabricated reinforced concrete retaining wall through a pre-stressed anchor cable reserved at the top of the prefabricated reinforced concrete retaining wall;
18) and constructing a pavement structure layer.
The invention has the beneficial effects that:
1. high steep topography transverse slope and longitudinal slope set up the back dip step, resist the transverse slope through the step and slide and the longitudinal slope problem of sliding, step department sets up anti-skidding anchor, improves the sliding resistance of contact surface, and step department earth's surface sets up shallow grouting reinforcement body, improves shallow earth's surface intensity through the slip casting, prevents to slide along the shallow layer of earth's surface to improve anti-skidding anchor's anchoring power. The skid resistance of the foam concrete with high and steep terrain can be obviously improved by the measures.
2. The foam concrete embankment transversely and longitudinally is provided with the parting joints, the parting joints are arranged in the middle of each step, steel plates are filled in the parting joints, triangular rib plates are arranged on two sides of the parting joint steel plates, and the huge high embankment is cut into blocks to adapt to uneven settlement of a high and steep foundation through the parting joints. The parting steel plate with the triangular rib plates can be used as a template of the blocks during pouring, and meanwhile, the blocks can be organically combined together. The dowel bars are arranged between the adjacent blocks of the foam concrete high embankment divided by the joint areas, one end of each dowel bar is fixed, the other end of each dowel bar is free, force can be transferred between the blocks, settlement is not limited, and uneven settlement can be adapted. The deformed steel plate laid at the joint of the top of the high and steep embankment is of a butterfly-shaped structure, the bulge is arranged in the joint, the two flanges are fixed in the blocks at the two sides and can adapt to joint deformation without damage, the integral type reinforcing mesh is laid above the deformed steel plate, and the joint deformation is prevented through the deformed steel plate and the integral type reinforcing mesh from being reflected to the road surface to cause the reflection crack of the road surface.
3. The foam concrete embankment sets up multistage prefabricated reinforced concrete barricade on the slope base one side of high and steep topography, and the prefabricated reinforced concrete barricade outside is provided with the counterfort, and minimum one-level prefabricated reinforced concrete barricade bottom is provided with the piece stone concrete banket, and piece stone concrete banket bottom is provided with the anti-overturning pile, and counterfort formula reinforced concrete barricade has higher anti-overturning ability, sets up the anti-overturning of steel pipe concrete pile simultaneously, and the panel of prefabricated reinforced concrete barricade can be regarded as the template of pouring the foam concrete. In addition, the wall surface of the prefabricated reinforced concrete retaining wall is provided with prestressed steel beams which penetrate through the foam concrete embankment and are fixed on the anchor pile, so that the overturning resistance is stronger when the overturning force is transmitted to the anchor pile through the prestressed steel beams.
4. The invention improves the anti-sliding capability, the non-uniform settlement capability and the anti-overturning capability of the high-steep-terrain foam concrete high retaining wall.
5. The high and steep embankment has high protection requirements on the guardrail, and the safety of the guardrail can be improved by fixing the prefabricated reinforced concrete guardrail through the prestressed anchor cables.
Drawings
FIG. 1 is a schematic cross-sectional view of an embankment structure;
FIG. 2 is a schematic view of a retaining wall, anti-overturning piles, anchor piles and pre-stressed steel beam system;
FIG. 3 is a schematic view of a prefabricated reinforced concrete retaining wall structure;
FIG. 4 is a schematic view of a steel plate with split seam and its auxiliary structure;
fig. 5 is a schematic cross-sectional view of a deformed steel plate.
Description of reference numerals: the prefabricated reinforced concrete retaining wall comprises an asphalt pavement 1, a deformed steel plate 2, a concrete base layer 3, an impermeable geotechnical cloth 4, foam concrete 5, prestressed steel bundles 6, bound soil 7, a permeable geotechnical cloth 8, an anti-skid anchor 9, an anchor pile 10, a cast-in-place concrete slab 11, a graded broken stone cushion layer 12, an anti-overturning pile 13, a stone slab concrete foot guard 14, a lower layer steel mesh 15, a prefabricated reinforced concrete retaining wall 16, an anchor 17, a prestressed anchor rope 18, a middle layer steel mesh 19, an upper layer steel mesh 20, a prefabricated guardrail 21, an integral steel mesh 22, a flange 23, a bulge 24, a fixing nail 25, a straight threaded sleeve 26, a dowel 27, a vertical plate 28, a dowel hole 29, a sleeve 30, a support rib 31, a prestressed steel bundle hole 32, a triangular rib plate 33, a split seam steel plate bottom plate 34, an anchor hole 35, an anchor 36, a wall body 37, a retaining wall bottom plate 38, a.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
According to the high and steep terrain foam concrete light embankment structure, the high and steep terrain transverse slope and the longitudinal slope are provided with the inverted steps, the height of each step is 2m, and the anti-skidding capacity of the inverted steps is strong. The anti-slip anchor 9 is arranged at the step, and the shallow grouting reinforcement body with the thickness of 2m is arranged on the ground surface of the step. Soil on the superficial layer of the earth surface is reinforced through grouting, the anti-slip capability of the soil is enhanced, and the foam concrete and the reinforcing body are connected together through the anti-slip anchor bolts 9, so that the anti-slip effect is further achieved. And a foam concrete embankment is poured above the steps, the foam concrete embankment is transversely and longitudinally provided with parting joints, the distance between the parting joints is 4m, and the parting joints are arranged in the middle of each step. The high and steep terrain embankment is very uneven in height and easy to generate uneven settlement, uneven deformation of the high and steep terrain is adapted through transverse parting and longitudinal parting, and the foam concrete embankment is divided into blocks by the parting. The parting steel plate is filled in the parting, triangular rib plates 33 are arranged on two sides of the parting steel plate, and a parting steel plate bottom plate 34 is arranged at the bottom of the parting steel plate. The split steel plate can be self-supported without support, can be conveniently used as a template for pouring foam concrete, and simultaneously improves the bending rigidity of the steel plate through the triangular rib plate to avoid being bent. A dowel bar 27 is arranged between each adjacent block of the foam concrete embankment divided by the parting areas, one end of the dowel bar 27 is screwed into a straight thread sleeve 26 and fixed in the foam concrete through the straight thread sleeve 26, the other end of the dowel bar is freely inserted into a sleeve 30, the inner diameter of the sleeve is slightly larger than the diameter of the dowel bar, and the dowel bar can freely move in the sleeve. Each foam concrete block can transmit force mutually through the dowel bar, and extrusion and tensile damage caused by expansion with heat and contraction with cold can be avoided. The foam concrete embankment is provided with the multistage prefabricated reinforced concrete retaining wall on one side of the slope bottom of the high and steep terrain, the outer side of the prefabricated reinforced concrete retaining wall 16 is provided with the counterfort 40, the height of the prefabricated reinforced concrete retaining wall is 3m, the width of the retaining wall bottom plate is 2m, the prefabricated reinforced concrete retaining wall can be used as a template for pouring foam concrete, and meanwhile, the anti-overturning capacity of the foam concrete embankment can be guaranteed. In order to further improve the anti-overturning capability, the bottom of the first-stage precast reinforced concrete retaining wall 16 is provided with a stone concrete guard 14, the bottom of the stone concrete guard 14 is provided with an anti-overturning pile 13, the diameter of the anti-overturning pile is 1m, the distance between the anti-overturning piles is 2m, the length of the anti-overturning pile is 7m, the pile top of the anti-overturning pile 13 is embedded in stone concrete and is connected with a retaining wall bottom plate 38 of the first-stage precast reinforced concrete retaining wall 16 through a prestressed anchor cable 18, the wall top of the first-stage precast reinforced concrete retaining wall 16 is connected with a retaining wall bottom plate 38 of the second-stage precast reinforced concrete retaining wall 16 through the prestressed anchor cable 18, a wall body 37 of the first-stage precast reinforced concrete retaining wall 16 is provided with a prestressed steel beam 6 which passes through a foam concrete embankment and is fixed on the anchor pile 10, the diameter of the anchor pile is 0.5m, the distance between the precast reinforced, on the other hand, the foam concrete embankment is prestressed to form the blocks into a whole. The deformed steel plate 2 is laid at the joint of the top of the high and steep embankment, the deformed steel plate deforms when uneven settlement occurs to enable the surface of the embankment to be evenly transited, the integral type reinforcing mesh 22 is laid at the top of the foam concrete embankment, a pavement structure layer (namely a concrete base layer 3 and an asphalt pavement 1) is laid above the integral type reinforcing mesh 22, and pavement cracks caused by uneven settlement are avoided through the deformed steel plate and the integral type reinforcing mesh. Prefabricated guardrail 21 is installed at embankment edge barricade top, and the guardrail passes through prestressed anchorage cable 18 to be fixed on the barricade top, can improve the protective capacities guarantee of high steep embankment and lead to car safety.
The grouting reinforcement body is arranged in the depth range of 2-3m along the ground surface, and the cross section and the longitudinal section of the grouting reinforcement body are step-shaped.
The steel sheet of dividing seam includes riser 28, steel sheet bottom plate 34 and triangle floor 33, and riser 28 is rectangular shape structure, and the bottom of riser 28 sets up the steel sheet bottom plate 34 of rectangular shape of dividing seam, and the both sides of riser 28 set up triangle floor 33, and it has anchor hole 35 to reserve on the steel sheet bottom plate 34 of dividing seam, and 28 one sides of riser are paintd lubricating oil, and another face pastes one deck pitch fir board. The joint separating steel plate can play a role in isolating the foam concrete to form a deformation joint, and damage caused by expansion with heat and contraction with cold and uneven settlement of the large-volume foam concrete is avoided. The lubricating oil and the asphalt fir board ensure that all foam concrete blocks are thoroughly separated by parting, and all blocks are not bonded.
The lower layer reinforcing mesh 15, the middle layer reinforcing mesh 19 and the upper layer reinforcing mesh 20 are arranged in the foam concrete embankment, the reinforcing meshes are paved in the embankment, and u-shaped reinforcing ribs are reversely inserted into the foam concrete to fix the reinforcing meshes. The reinforcing steel bars are bent into a u shape, and the reinforcing steel bar mesh can be fixed on the poured foam concrete embankment by using the u-shaped reinforcing steel bars as fixing clamps.
The prefabricated reinforced concrete retaining wall 16 is a buttress retaining wall, a buttress 40 is arranged on the outer side of the retaining wall, a prestressed anchor cable hole 39 is preset on a retaining wall bottom plate 38, a prestressed anchor cable 18 is pre-embedded in the wall top, and the prestressed anchor cable is convenient to install, strong in connecting capacity, firm and reliable.
The anti-overturning pile 13 and the anchor pile 10 both adopt steel pipe concrete piles, a prestressed anchor cable 18 is pre-embedded at the pile top of the anti-overturning pile 13, and the anti-overturning pile 13 and the prefabricated reinforced concrete retaining wall 16 can be firmly connected through the prestressed anchor cable 18;
one end of the dowel bar 27 is fixed in the straight thread sleeve 26, the other end of the dowel bar extends into the sleeve 30, the straight thread sleeve 26 is directly welded on the parting steel plate, and the sleeve 30 is fixed on the parting steel plate through the supporting ribs 31, so that the dowel bar is not damaged when foam concrete is poured.
The deformed steel plate 2 is strip-shaped and consists of flanges 23 and protrusions 24, the cross section of the deformed steel plate is butterfly-shaped, the protrusions 24 are arranged at the parting positions, and the butterfly-shaped deformed steel plate has better deformation capacity.
The prefabricated guardrail 21 is of an L-shaped structure, and anchor cable holes are reserved in a bottom plate of the prefabricated guardrail.
And a graded broken stone cushion layer 12 and a cast-in-place concrete slab 11 are laid on the inner side of the stone concrete foot protector 14.
The anchor 36 is a threaded steel bar.
The surface of the step inclines to the inner side of the foundation by a certain angle; and the surface of the inverted step is paved with the permeable geotextile 8.
The construction method of the high and steep topography foam concrete light embankment structure comprises the following construction steps:
1) excavating transverse steps and longitudinal steps on the ground surface of the steep slope terrain, wherein the steps are excavated in an inverted-inclined shape, namely the surfaces of the steps incline to the inner side of a foundation by a certain angle;
2) uniformly drilling grouting holes in the step, inserting grouting pipes, and injecting cement slurry through a grouting pump to perform grouting reinforcement on the shallow layer of the step surface;
3) constructing an anchor pile 10 and an anti-overturning pile 13: drilling holes at the pile positions of the anchor pile 10 and the anti-overturning pile 13, inserting a steel pipe, placing a steel reinforcement cage in the steel pipe and pouring self-compacting concrete, and pre-burying a pre-stressed anchor cable 18 at the top of the anti-overturning pile 13;
4) the prefabricated reinforced concrete retaining wall 16 with the buttress 40 is prefabricated on site, a prestressed anchor cable hole 39 is reserved on a retaining wall bottom plate 38, and a prestressed anchor cable 18 is pre-embedded at the top of a wall body 37;
5) pouring a stone concrete toe guard 14 at the top of the anti-overturning pile 13, paving a graded broken stone cushion layer 12 and a cast-in-place concrete slab 11 on a first step at the inner side of the stone concrete toe guard 14, hoisting a first-stage prefabricated reinforced concrete retaining wall 16 at the top of the stone concrete toe guard 14, and applying prestress on a retaining wall bottom plate 38 of the first-stage prefabricated reinforced concrete retaining wall 16 by using a pre-stressed anchor cable 18 reserved by the anti-overturning pile 13 and anchoring the pre-stressed anchor cable on the retaining wall bottom plate 38 of the first-stage prefabricated reinforced concrete retaining wall 16 by using an anchorage device 17;
6) welding a parting steel plate bottom plate 34 at the bottom of a vertical plate 28, welding triangular rib plates 33 at two sides of the vertical plate 28, drilling a force transmission rod hole 39 on the vertical plate 28, welding a straight thread sleeve 26 at one side of the force transmission rod hole 39, screwing one end of a force transmission rod 27 into the straight thread sleeve 26, sleeving a sleeve 30 at the other end of the force transmission rod, welding the bottom of the sleeve 30 on the vertical plate 28 through a support rib 31, drilling a prestressed steel beam hole 32 at the position of the vertical plate where a prestressed steel beam passes, and manufacturing to form a parting steel plate;
7) placing the parting steel plate along the parting position and fixing the parting steel plate by using an anchor 36, smearing butter on one side of a vertical plate 28, and sticking a layer of asphalt fir plate on the other side;
8) mounting a prestressed steel beam 6 on the first-stage precast reinforced concrete retaining wall 16, penetrating the prestressed steel beam 6 through a prestressed steel beam hole 32 on a parting steel plate, and then fixing the prestressed steel beam on the anchor pile 10 and applying prestress;
9) pouring foam concrete in a block which is mutually enclosed by the parting steel plate and the first-stage prefabricated reinforced concrete retaining wall 16, laying a reinforcing mesh at the designed elevation of the reinforcing mesh and fixing by using u-shaped reinforcing steel bars when pouring the foam concrete;
10) hoisting a second-stage prefabricated reinforced concrete retaining wall 16 at the top of the first-stage prefabricated reinforced concrete retaining wall 16, and enabling a prestressed anchor cable 18 on the wall top of the first-stage prefabricated reinforced concrete retaining wall 16 to penetrate through a retaining wall bottom plate 38 of the second-stage prefabricated reinforced concrete retaining wall 16, anchoring and applying prestress;
11) setting up parting steel plates at the parting positions of the foam concrete and fixing the parting steel plates by using rivets, mounting prestressed steel beams 6 on the second-stage prefabricated reinforced concrete retaining wall 16, penetrating the prestressed steel beams 6 through the parting steel plates to be fixed on the anchor piles 10 and applying prestress;
12) pouring foam concrete in a block which is mutually enclosed by the parting steel plate and the second-stage prefabricated reinforced concrete retaining wall 16, laying a reinforcing mesh at the designed elevation of the reinforcing mesh and fixing by using u-shaped reinforcing steel bars when pouring the foam concrete;
13) repeating the steps 10) to 12) until the designed foam concrete pouring elevation is reached;
14) embedding a deformed steel plate 2 in a gap at the top of the foam concrete embankment before the foam concrete is hardened, embedding a bulge 24 of the deformed steel plate 2 in the gap, embedding the two flanges 23 in the foam concrete and driving fixing nails 25 for fixing;
15) laying an integral reinforcing mesh 22 at the top of the foam concrete embankment, and fixing the reinforcing mesh in the foam concrete through anchoring bolts;
16) paving impermeable geotextile 4 on the step slope on the other side opposite to the prefabricated reinforced concrete retaining wall 16 and filling edge-covering soil 7;
17) mounting a prefabricated guardrail 21, wherein a bottom plate of the guardrail is fixed on the top of the prefabricated reinforced concrete retaining wall 16 through a pre-stressed anchor cable 18 reserved on the top of the prefabricated reinforced concrete retaining wall 16;
18) and constructing a pavement structure layer.
Claims (10)
1. The utility model provides a high steep topography foam concrete light embankment structure which characterized in that: the prefabricated concrete retaining wall comprises prestressed steel bundles (6), anti-sliding anchors (9), anchor piles (10), anti-overturning piles (13), stone concrete foot guards (14), a prefabricated reinforced concrete retaining wall (16), prestressed anchor cables (18), prefabricated guardrails (21) and an integral reinforcing mesh (22); the transverse slope and the longitudinal slope of the high and steep terrain are provided with a reverse-inclined step, an anti-skid anchor (9) is arranged at the step, and the surface of the step is provided with a shallow grouting reinforcement body; a foam concrete embankment is poured above the steps, and is provided with parting joints in the transverse direction and the longitudinal direction, and the parting joints are arranged in the middle of each step; a parting steel plate is filled in the parting, and dowel bars (27) are arranged between each adjacent block divided by the parting area of the foam concrete embankment; the foam concrete embankment is characterized in that a multistage prefabricated reinforced concrete retaining wall (16) is arranged on one side of the slope bottom of a high and steep terrain, a buttress (40) is arranged on the outer side of the prefabricated reinforced concrete retaining wall (16), a stone concrete guard leg (14) is arranged at the bottom of the first-stage prefabricated reinforced concrete retaining wall (16), an anti-overturning pile (13) is arranged at the bottom of the stone concrete guard leg (14), and the pile top of the anti-overturning pile (13) is embedded in the stone concrete and connected with a retaining wall bottom plate (38) of the first-stage prefabricated reinforced concrete retaining wall (16) through a prestressed anchor cable (18); the top of the wall body (37) of the first-stage precast reinforced concrete retaining wall (16) is connected with the retaining wall bottom plate (38) of the second-stage precast reinforced concrete retaining wall (16) through a prestressed anchor cable (18), and the wall body (37) of the precast reinforced concrete retaining wall (16) is provided with a prestressed steel beam (6) which penetrates through the foam concrete embankment and is fixed on the anchor pile (10); a deformed steel plate (2) is laid at a parting position of the top of a foam concrete embankment, the deformed steel plate (2) is fixed on foam concrete through fixing nails (25), an integral type reinforcing mesh (22) is laid at the top of the foam concrete embankment, a pavement structure layer is laid above the integral type reinforcing mesh (22), and prefabricated guardrails (21) are installed at the top of a retaining wall at the edge of the foam concrete embankment.
2. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: the steel sheet of dividing seam includes riser (28), dividing seam steel sheet bottom plate (34) and triangle floor (33), and riser (28) are rectangular shape structure, and the bottom of riser (28) sets up the dividing seam steel sheet bottom plate (34) of rectangular shape, and the both sides of riser (28) set up triangle floor (33), reserve on dividing seam steel sheet bottom plate (34) to have anchor hole (35), and lubricating oil has been paintd to riser (28) one side, and one deck pitch fir board is pasted to another side.
3. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: a lower layer reinforcing mesh (15), a middle layer reinforcing mesh (19) and an upper layer reinforcing mesh (20) are arranged in the foam concrete embankment, and the reinforcing meshes are inversely inserted into the foam concrete through u-shaped reinforcing ribs to be fixed.
4. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: prefabricated reinforced concrete barricade (16) is buttress formula barricade, and buttress (40) set up in prefabricated reinforced concrete barricade (16) outside, have preset prestressed anchorage cable hole (39) on barricade bottom plate (38), and pre-buried prestressed anchorage cable (18) in wall body (37) top.
5. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: the anti-overturning pile (13) and the anchor pile (10) both adopt a steel pipe concrete pile, and a prestressed anchor cable (18) is pre-buried at the pile top of the anti-overturning pile (13).
6. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: one end of the dowel bar (27) is fixed in the straight thread sleeve (26), the other end of the dowel bar extends into the sleeve (30), the straight thread sleeve (26) is directly welded on the parting steel plate, and the sleeve (30) is fixed on the parting steel plate through the supporting rib (31).
7. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: the deformed steel plate (2) is of a strip-shaped structure, the deformed steel plate (2) is composed of flanges (23) and protrusions (24), the cross section of the deformed steel plate is butterfly-shaped, and the protrusions (24) are arranged at parting positions.
8. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: and a graded broken stone cushion layer (12) and a cast-in-place concrete slab (11) are laid on the inner side of the stone concrete protection leg (14).
9. The high steep terrain foam concrete light embankment structure according to claim 1, wherein: the inverted step is formed by inclining the surface of the step to the inner side of the foundation by a certain angle; and the surface of the inverted step is paved with permeable geotextile (8).
10. A construction method of a high steep topography foam concrete light embankment structure according to claim 1, characterized by comprising the following construction steps:
1) excavating transverse steps and longitudinal steps on the ground surface of the steep slope terrain, wherein the steps are excavated in an inverted-inclined shape, namely the surfaces of the steps incline to the inner side of a foundation by a certain angle;
2) uniformly drilling grouting holes in the step, inserting grouting pipes, and injecting cement slurry through a grouting pump to perform grouting reinforcement on the shallow layer of the step surface;
3) constructing anchor piles (10) and anti-overturning piles (13): drilling holes at the pile positions of the anchor pile (10) and the anti-overturning pile (13), inserting a steel pipe, placing a reinforcement cage in the steel pipe and pouring self-compacting concrete, and pre-burying a pre-stressed anchor cable (18) at the top of the anti-overturning pile (13);
4) the prefabricated reinforced concrete retaining wall (16) with the buttress (40) is prefabricated on site, a prestressed anchor cable hole (39) is reserved on a retaining wall bottom plate (38), and a prestressed anchor cable (18) is pre-buried at the top of a wall body (37);
5) pouring a stone concrete guard pin (14) at the top of an anti-overturning pile (13), paving a graded broken stone cushion layer (12) and a cast-in-place concrete slab (11) on a first step at the inner side of the stone concrete guard pin (14), hoisting a first-stage prefabricated reinforced concrete retaining wall (16) at the top of the stone concrete guard pin (14), and applying prestress and anchoring an anchorage device (17) on a retaining wall bottom plate (38) of the first-stage prefabricated reinforced concrete retaining wall (16) by a prestress anchorage cable (18) reserved in the anti-overturning pile (13) to penetrate through the retaining wall bottom plate (38) of the first-stage prefabricated reinforced concrete retaining wall (16);
6) welding a parting steel plate bottom plate (34) at the bottom of a vertical plate (28), welding triangular rib plates (33) at two sides of the vertical plate (28), drilling a force transmission rod hole (29) on the vertical plate (28), welding a straight thread sleeve (26) at one side of the force transmission rod hole (29), screwing one end of a force transmission rod (27) into the straight thread sleeve (26), sleeving a sleeve (30) at the other end of the force transmission rod, welding the bottom of the sleeve (30) on the vertical plate (28) through a support rib (31), drilling a prestressed steel beam hole (32) at the position where a prestressed steel beam penetrates on the vertical plate, and manufacturing to form a parting steel plate;
7) placing the parting steel plate along the parting position and fixing the parting steel plate by using an anchor nail (36), smearing grease on one surface of a vertical plate (28), and pasting a layer of asphalt fir plate on the other surface;
8) mounting a prestressed steel beam (6) on a wall body (37) of a first-stage precast reinforced concrete retaining wall (16), penetrating the prestressed steel beam (6) through a prestressed steel beam hole (32) on a parting steel plate, and then fixing the prestressed steel beam (6) on an anchor pile (10) and applying prestress;
9) foam concrete is poured in a block which is mutually enclosed by the parting steel plate and the first-stage prefabricated reinforced concrete retaining wall (16), and a reinforcing mesh is laid at the designed elevation of the reinforcing mesh and fixed by u-shaped reinforcing steel bars when the foam concrete is poured;
10) hoisting a second-stage prefabricated reinforced concrete retaining wall (16) at the top of the first-stage prefabricated reinforced concrete retaining wall (16), and enabling a prestressed anchor cable (18) at the top of the first-stage prefabricated reinforced concrete retaining wall (16) to penetrate through a retaining wall bottom plate (38) of the second-stage prefabricated reinforced concrete retaining wall (16) for anchoring and applying prestress;
11) setting a parting steel plate at the parting position of the foam concrete and fixing the parting steel plate by using an anchor bolt (36), installing a prestressed steel beam (6) on a wall body (37) of the second-stage prefabricated reinforced concrete retaining wall (16), penetrating the prestressed steel beam (6) through the parting steel plate and fixing the prestressed steel beam on an anchor pile (10) and applying prestress;
12) foam concrete is poured in a block which is mutually enclosed by the parting steel plate and the second-stage prefabricated reinforced concrete retaining wall (16), and a reinforcing mesh is laid at the designed elevation of the reinforcing mesh and fixed by u-shaped reinforcing steel bars when the foam concrete is poured;
13) repeating the steps 10) to 12) until the designed foam concrete pouring elevation is reached;
14) embedding a deformed steel plate (2) before the foam concrete is hardened at a parting joint at the top of the foam concrete embankment, embedding a bulge (24) of the deformed steel plate (2) into the parting joint, embedding the foam concrete into two flanges (23) and driving fixing nails (25) into the flanges for fixing;
15) laying an integral type reinforcing mesh (22) on the top of the foam concrete embankment, wherein the integral type reinforcing mesh (22) is fixed in the foam concrete through anchoring bolts;
16) paving impermeable geotextile (4) on the step slope on the other side opposite to the prefabricated reinforced concrete retaining wall (16) and filling edge-covering soil (7);
17) mounting a prefabricated guardrail (21), wherein a bottom plate of the prefabricated guardrail (21) is fixed at the top of the prefabricated reinforced concrete retaining wall (16) through a pre-stressed anchor cable (18) reserved at the top of the prefabricated reinforced concrete retaining wall (16);
18) and constructing a pavement structure layer.
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| CN112031002A (en) * | 2020-09-08 | 2020-12-04 | 浙江世润建创科技发展有限公司 | Pile-supported ecological slope protection and construction method |
| CN113026461A (en) * | 2021-04-01 | 2021-06-25 | 广西北投交通养护科技集团有限公司 | Reinforced foam concrete roadbed structure and roadbed filling method |
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| CN114182591A (en) * | 2021-12-21 | 2022-03-15 | 中国科学院武汉岩土力学研究所 | Open caisson type soft soil foundation and soft soil foundation reinforcing method |
| CN116905301A (en) * | 2023-09-07 | 2023-10-20 | 中交第一航务工程局有限公司 | Deep cutting construction method |
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