CN113308954A - Construction method of anchor rod foam concrete widening roadbed - Google Patents
Construction method of anchor rod foam concrete widening roadbed Download PDFInfo
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- CN113308954A CN113308954A CN202110531956.4A CN202110531956A CN113308954A CN 113308954 A CN113308954 A CN 113308954A CN 202110531956 A CN202110531956 A CN 202110531956A CN 113308954 A CN113308954 A CN 113308954A
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- foam concrete
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000004566 building material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
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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
- 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
- E01C3/04—Foundations produced by soil stabilisation
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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
- E02D17/18—Making embankments, e.g. dikes, dams
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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
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
- E02D29/0233—Retaining or protecting walls comprising retention means in the backfill the retention means being anchors
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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
- E02D29/0266—Retaining or protecting walls characterised by constructional features made up of preformed elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a construction method of an anchor rod foam concrete widening roadbed, which comprises the steps of firstly constructing an n-shaped foundation, then installing an L-shaped baffle plate and an inserting plate layer by layer to form a panel, carrying out foam concrete backfill pouring layer by layer, then constructing a pavement waterproof and drainage system, finally pouring a leveling layer, constructing a new pavement layer, and completing construction of the anchor rod foam concrete widening roadbed. The invention has the beneficial effects that: the n-type foundation arranged by the invention not only greatly reduces the foundation excavation amount, but also effectively improves the bearing capacity of the foundation of the foam concrete backfilling area, and the integrity with the existing roadbed is enhanced by utilizing the hollow grouting anchor rod, so that the technical benefit advantage is obvious; the inserting plate and the L-shaped baffle plate are reasonable in structure and simple and convenient to manufacture and install, the construction efficiency of the panel is effectively improved, and the construction period is shortened; the support and the support rod arranged in the invention not only improve the integrity and rigidity of the panel, but also strengthen the connection of the new roadbed and the old roadbed and reduce the settlement difference.
Description
Technical Field
The invention relates to the technical field of road engineering construction, in particular to a construction method for widening a roadbed by anchor rod foam concrete.
Background
A new pattern is introduced by the road industry in China, and the large-scale new road is gradually changed into the situation of coexistence of reconstruction, extension and new construction. The road reconstruction and extension project becomes a new key point of road construction in more than ten years in the future. The foam concrete has the characteristic of lightening load or soil pressure, and the mixed slurry can automatically level and self-compact when being formed; the construction workability is good, the pumping and leveling are facilitated, the building material has good compatibility with other building materials, and the strength can be adjusted according to requirements. The foam concrete has good characteristics, is applied to widened roadbed filling in road expansion, can better solve the problem of differential deformation of a new roadbed and an old roadbed, can save land acquisition and avoids removal.
In the prior art, foam concrete construction usually needs to excavate a roadbed, finish steps, build a panel foundation and then synchronously construct a prefabricated panel and foam concrete. Although the traditional construction method adopts the foam concrete to improve the filling quality of the roadbed to a certain extent, the excavation amount of the roadbed is large in the construction process, the settlement of the bottom of a foam concrete backfilling area cannot be avoided, the new roadbed and the old roadbed are not firmly connected, and the roadbed is easy to crack and displace.
Therefore, the construction method of the anchor rod foam concrete widening roadbed which is safe and stable, effectively reduces the settlement amount of the new widening roadbed and strengthens the connection of the new roadbed and the old roadbed is very important.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a construction method for widening a roadbed by anchor rod foam concrete.
The anchor rod foam concrete widening roadbed comprises a leveling layer, a drainage pipeline, a drainage blind ditch, a water stopping layer, a support foundation, a support, an anchor rod group, a hollow grouting anchor rod, an inclined support rod, a horizontal support rod, a plain concrete transition zone, an inserting plate, an L-shaped baffle, an anchor head, an n-shaped foundation, foam concrete and a horizontal lateral support rod, wherein the n-shaped foundation is arranged at the bottom of an existing roadbed, the hollow grouting anchor rod obliquely penetrates through the n-shaped foundation to be arranged in the existing roadbed, the anchor head is arranged at one end of the outer side of the hollow grouting anchor rod, the plain concrete transition zone is arranged between an existing roadbed slope and the n-shaped foundation, the L-shaped baffle is arranged on the n-shaped foundation, the inserting plate is arranged on the L-shaped baffle, the anchor rod group is arranged at the bottom of the support foundation, the support foundation and the anchor rod group are arranged in the existing roadbed slope, the support foundation, the inserting plate, the L-shaped baffle and the n-shaped foundation are all provided with supports, the picture peg and the L type baffle of bottom respectively with be equipped with the bearing diagonal pole between the n type basis, be equipped with bearing diagonal pole, horizontal support pole and horizontal side direction bracing piece between support basis and the picture peg, the foam concrete sets up between existing road bed and panel, drainage underdrain bottom is equipped with the stagnant water layer, and the drainage underdrain sets up in the below that existing pavement layer and new pavement layer meet the department, drainage underdrain is connected to drainage pipe one end, and the picture peg at top is passed to the other end, the screed-coat sets up between new pavement layer and foam concrete.
Preferably, the method comprises the following steps: the panel constitute by a plurality of picture pegs and L type baffle, the picture peg top is equipped with steel socket, and the picture peg bottom is equipped with the steel plug, L type baffle top is equipped with steel socket, L type baffle bottom is equipped with the keyhole, the steel plug of picture peg bottom and the steel socket cooperation on L type baffle top are connected.
Preferably, the method comprises the following steps: the novel anchor rod is characterized in that an inclined anchor rod hole is formed in the n-type foundation, two supporting legs are arranged at the bottom of the n-type foundation, the top of the n-type foundation is a wedge-shaped surface, a support is arranged at the lower end of the n-type foundation, and foundation bolts are arranged at the high end of the n-type foundation.
The construction method of the anchor rod foam concrete widening roadbed comprises the following steps:
1) firstly, slope cleaning is carried out on an existing roadbed side slope, a convex foundation pit is excavated on a base, then steel bars are bound, foundation bolts and reserved anchor rod holes are pre-embedded in advance, then concrete is poured to form an n-shaped foundation of the reinforced concrete, a hollow grouting anchor rod is arranged on the existing roadbed through the anchor rod holes, after the hollow grouting anchor rod is grouted, the hollow grouting anchor rod and the n-shaped foundation are fixed together through an anchor head, and a plain concrete transition zone is backfilled between the n-shaped foundation and the existing roadbed;
2) firstly, installing an L-shaped baffle on an n-shaped foundation by using foundation bolts, fixedly installing supports on the L-shaped baffle and the n-shaped foundation, then installing inclined supporting rods between the supports, simultaneously drilling an anchor rod group on the existing roadbed slope according to the installation height of an inserting plate, pouring a support foundation on the top of the anchor rod group, installing the supports on the support foundation, then installing an inserting plate on the L-shaped baffle, installing the supports on the inserting plate, and having the same height as the supports on the support foundation, finally installing the inclined supporting rods between the inserting plate and the supports on the n-shaped foundation, and respectively installing a horizontal supporting rod and a horizontal lateral supporting rod between the support foundation and the supports of the inserting plate;
3) respectively sealing and waterproofing between the inserting plates in the horizontal direction and between the L-shaped baffles in the horizontal direction, backfilling and pouring foam concrete between the existing roadbed and the panel by taking the horizontal supporting rods as pouring boundary lines, continuously installing the support foundation, the inserting plates and the supporting rods according to the height of the widening roadbed, and pouring and backfilling the foam concrete layer by layer until the height is designed;
4) firstly, chiseling the overlapping edges of the existing pavement layers to form inclined edges, excavating a groove below the inclined edges, constructing a water stopping layer at the bottom of the groove, constructing a drainage blind ditch, installing drainage pipelines wrapped with geotextile at intervals outside the drainage blind ditch, and leading the drainage pipelines to the outside at a certain gradient and penetrating through a plugboard at the top;
5) and finally, pouring a leveling layer above the backfilled foam concrete, and applying a new pavement layer to be in lap joint with the existing pavement layer to finish the construction of the anchor rod foam concrete widening roadbed.
The invention has the beneficial effects that:
1. compared with the prior art, the n-type foundation provided by the invention not only greatly reduces the foundation excavation amount, but also effectively improves the bearing capacity of the foundation of the foam concrete backfilling area, and has obvious technical benefit advantages by utilizing the hollow grouting anchor rod to strengthen the integrity with the existing roadbed.
2. The inserting plate and the L-shaped baffle plate are reasonable in structure and simple and convenient to manufacture and install, the construction efficiency of the panel is effectively improved, and the construction period is shortened.
3. The support and the support rod arranged in the invention not only improve the integrity and rigidity of the panel, but also strengthen the connection of the new roadbed and the old roadbed and reduce the settlement difference.
4. The drainage blind ditch provided by the invention has a reasonable structure, effectively removes rainwater possibly seeping from the joint of the new and old road surfaces, avoids harm to the joint surface of the new and old roadbed, and ensures the filling quality of the roadbed.
Drawings
FIG. 1 is a schematic diagram of an anchor rod foam concrete widening roadbed;
FIG. 2 is a schematic cross-sectional view of an n-type base;
FIG. 3 is a schematic view of the construction of an n-type foundation;
FIG. 4 is a schematic view of a board insertion unit;
FIG. 5 is a schematic view of an L-shaped baffle unit;
FIG. 6 is a schematic view of the installation of the panel structure;
FIG. 7 is a floor plan view of the panel construction;
FIG. 8 is a schematic illustration of a cellular concrete stratified backfill;
fig. 9 is a layout view of the underdrain.
Description of reference numerals: 1-existing pavement layer; 2-new pavement layer; 3-leveling layer; 4-a drainage pipeline; 5-drainage underdrain; 6-water stopping layer; 7-support foundation; 8-support; 9-anchor rod group; 10-hollow grouting anchor rod; 11-diagonal bracing bar; 12-horizontal support bar; 13-plain concrete transition zone; 14-plug board; 15-L-shaped baffle; 16-anchor head; 17-n type basis; 18-steel socket; 19-bolt hole; 20-steel plug; 21-foam concrete; 22-existing subgrade; 23-horizontal lateral support bar; 24-anchor bolts; 25-anchor rod hole; 26-leg.
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.
Example one
The anchor rod foam concrete wide-splicing roadbed comprises a leveling layer 3, a drainage pipeline 4, a drainage blind ditch 5, a water stop layer 6, a support foundation 7, a support 8, an anchor rod group 9, a hollow grouting anchor rod 10, an inclined support rod 11, a horizontal support rod 12, a plain concrete transition zone 13, an insertion plate 14, an L-shaped baffle 15, an anchor head 16, an n-shaped foundation 17, foam concrete 21 and a horizontal lateral support rod 23, wherein the n-shaped foundation 17 is arranged at the bottom of an existing roadbed 22, the hollow grouting anchor rod 10 obliquely penetrates through the n-shaped foundation 17 to be arranged in the existing roadbed 22, the anchor head 16 is arranged at one end of the outer side of the hollow grouting anchor rod 10, the plain concrete transition zone 13 is arranged between the slope of the existing roadbed 22 and the n-shaped foundation 17, the L-shaped baffle 15 is arranged on the n-shaped foundation 17, the insertion plate 14 is arranged on the L-shaped baffle 15, the anchor rod group 9 is arranged at the bottom of the support foundation 7, the support foundation 7 and the anchor rod group 9 are arranged in the side slope of the existing roadbed 22, the supports 8 are arranged on the support foundation 7, the inserting plate 14, the L-shaped baffle plate 15 and the n-shaped foundation 17, the bottom inserting plate 14 is connected to the upper part of the L-shaped baffle plate, inclined supporting rods 11 are respectively arranged between the L-shaped baffle plate 15 and the n-shaped foundation 17, an inclined supporting rod 11, a horizontal supporting rod 12 and a horizontal lateral supporting rod 23 are arranged between the support foundation 7 and the inserting plate 14, the foam concrete 21 is arranged between the existing roadbed 22 and the panel, the bottom of the drainage underdrain 5 is provided with a water stopping layer 6, the drainage underdrain 5 is arranged below the joint of the existing pavement layer 1 and the new pavement layer 2, one end of the drainage pipeline 4 is connected with the drainage blind ditch 5, the other end of the drainage pipeline penetrates through the inserting plate 14 at the top to be located at the position of the new pavement layer, and the leveling layer 3 is arranged between the new pavement layer 2 and the foam concrete 21.
As shown in fig. 4 and 5, the panel is composed of a plurality of insertion plates 14 and L-shaped baffles 15, wherein steel sockets 18 are arranged at the top ends of the insertion plates 14, steel plugs 20 are arranged at the bottom ends of the insertion plates 14, the steel sockets 18 are arranged at the top ends of the L-shaped baffles 15, bolt holes 19 are arranged at the bottom ends of the L-shaped baffles 15, and the steel plugs 20 at the bottom ends of the insertion plates 14 are connected with the steel sockets 18 at the top ends of the L-shaped baffles 15 in a matching manner.
As shown in fig. 2, an inclined anchor rod hole 25 is formed in the n-type foundation 17, two support legs 26 are arranged at the bottom of the n-type foundation 17, the top of the n-type foundation 17 is a wedge-shaped surface, a support 8 is arranged at the lower end, and an anchor bolt 24 is arranged at the higher end.
Example two
The construction method of the anchor rod foam concrete widening roadbed comprises the steps of firstly constructing an n-shaped foundation, then installing L-shaped baffles and inserting plates layer by layer to form a panel, carrying out foam concrete backfill pouring layer by layer, then constructing a pavement waterproof and drainage system, finally pouring a leveling layer, constructing a new pavement layer, and completing construction of the anchor rod foam concrete widening roadbed. The method specifically comprises the following steps:
1) as shown in fig. 3, firstly, slope cleaning is carried out on the side slope of the existing roadbed 22, a convex foundation pit is excavated on the foundation, then steel bars are bound, foundation bolts 24 and reserved anchor rod holes 25 are pre-embedded in advance, then concrete is poured to form an n-type foundation 17 of reinforced concrete, a hollow grouting anchor rod 10 is arranged on the existing roadbed 22 through the anchor rod holes 25, after the hollow grouting anchor rod 10 is grouted, the hollow grouting anchor rod 10 and the n-type foundation 17 are fixed together by using an anchor head 16, and a plain concrete transition zone 13 is filled and poured between the n-type foundation 17 and the existing roadbed 22;
2) as shown in fig. 6 and 7, firstly, the L-shaped baffle 15 is installed on the n-shaped foundation 17 by using anchor bolts 24, the supports 8 are fixedly installed on the L-shaped baffle 15 and the n-shaped foundation 17, then the inclined support rods 11 are installed between the supports 8, meanwhile, the anchor rod group 9 is arranged on the slope of the existing roadbed 22 according to the installation height of the inserting plate 14, the support foundation 7 is poured on the top of the anchor rod group 9, the supports 8 are installed on the support foundation 7, then the inserting plate 14 is installed on the L-shaped baffle 15, the supports 8 are installed on the inserting plate 14 and are as high as the supports 8 on the support foundation 7, finally, the inclined support rods 11 are installed between the inserting plate 14 and the supports 8 on the n-shaped foundation 17, and the horizontal support rods 12 and the horizontal lateral support rods 23 are respectively installed between the support foundation 7 and the supports 8 on the inserting plate 14;
3) as shown in fig. 8, after sealing and waterproofing are respectively performed between the inserting plates 14 in the horizontal direction and between the L-shaped baffles 15 in the horizontal direction, foam concrete 21 is backfilled and poured between the existing roadbed 22 and the panels by taking the horizontal supporting rods 12 as pouring boundary lines, then the support foundation 7, the inserting plates 14 and the supporting rods are continuously installed according to the height of the widening roadbed, and the foam concrete 21 is backfilled by layer pouring until the designed height is reached;
4) as shown in fig. 9, the overlapping edges of the existing pavement layer 1 are chiseled to form oblique edges, then trenches are dug below the oblique edges, water stopping layers 6 are applied to the bottoms of the trenches, then drainage blind ditches 5 are applied, drainage pipelines 4 wrapped with geotextiles are installed at intervals outside the drainage blind ditches 5, and the drainage pipelines 4 lead to the outside at a gradient of 3% and pass through the inserting plates 14 at the top;
5) and finally, pouring a leveling layer 3 above the backfilled foam concrete 21, and applying a new pavement layer 2 to be lapped with the existing pavement layer 1 to complete the construction of the anchor rod foam concrete widening roadbed as shown in figure 1.
Claims (1)
1. A construction method for a roadbed by splicing anchor rod foam concrete is characterized by comprising the following steps:
1) firstly, slope cleaning is carried out on the side slope of the existing roadbed (22), a convex foundation pit is excavated on the foundation, then steel bars are bound, foundation bolts (24) and reserved anchor rod holes (25) are pre-embedded in advance, then concrete is poured to form an n-type foundation (17) of the reinforced concrete, a hollow grouting anchor rod (10) is arranged on the existing roadbed (22) through the anchor rod holes (25), after the hollow grouting anchor rod (10) is grouted, the hollow grouting anchor rod (10) and the n-type foundation (17) are fixed together by using an anchor head (16), and a plain concrete transition zone (13) is backfilled and poured between the n-type foundation (17) and the existing roadbed (22);
2) firstly, an L-shaped baffle (15) is arranged on an n-shaped foundation (17) by using foundation bolts (24), a support (8) is fixedly arranged on the L-shaped baffle (15) and the n-shaped base (17), then installing inclined supporting rods (11) between the supporting seats (8), simultaneously drilling anchor rod groups (9) on the side slopes of the existing roadbed (22) according to the installation height of the inserting plates (14), pouring a support foundation (7) on the top of the anchor rod group (9), installing a support (8) on the support foundation (7), then an inserting plate (14) is arranged on the L-shaped baffle plate (15), a support (8) is arranged on the inserting plate (14), and is as high as the support (8) on the support foundation (7), finally, an inclined support rod (11) is arranged between the inserting plate (14) and the support (8) of the n-shaped foundation (17), a horizontal supporting rod (12) and a horizontal lateral supporting rod (23) are respectively arranged between the support base (7) and the support (8) of the inserting plate (14);
3) respectively performing sealing and water proofing between the inserting plates (14) in the horizontal direction and between the L-shaped baffles (15) in the horizontal direction, backfilling and pouring foam concrete (21) between the existing roadbed (22) and the panels by taking the horizontal supporting rods (12) as pouring boundary lines, continuously installing the support foundation (7), the inserting plates (14) and the supporting rods according to the height of the widening roadbed, and backfilling the foam concrete (21) by layer pouring until the height is designed;
4) firstly, the overlapping edges of the existing pavement layers (1) are roughened to form inclined edges, then grooves are dug below the inclined edges, water stopping layers (6) are applied to the bottoms of the grooves, then drainage blind ditches (5) are applied, drainage pipelines (4) wrapped with geotextile are installed on the outer sides of the drainage blind ditches (5) at intervals, and the drainage pipelines (4) lead to the outer sides at a certain gradient and penetrate through inserting plates (14) at the tops;
5) and finally, pouring a leveling layer (3) above the backfilled foam concrete (21), and applying a new pavement layer (2) to be lapped with the existing pavement layer (1) to complete construction of the anchor rod foam concrete widening roadbed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110531956.4A CN113308954B (en) | 2021-05-17 | 2021-05-17 | Construction method of anchor rod foam concrete widening roadbed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110531956.4A CN113308954B (en) | 2021-05-17 | 2021-05-17 | Construction method of anchor rod foam concrete widening roadbed |
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| CN113308954A true CN113308954A (en) | 2021-08-27 |
| CN113308954B CN113308954B (en) | 2023-03-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318982A (en) * | 2021-11-30 | 2022-04-12 | 中南大学 | Foam light soil supporting structure for building large-area terrace |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007297805A (en) * | 2006-04-28 | 2007-11-15 | Kankyo Kogaku Kk | Civil engineering structure and construction material therefor |
| CN102352632A (en) * | 2011-07-29 | 2012-02-15 | 重庆大学 | Anchor rod sheet pile combined structure and method for reinforcing high filling body on one side of slope |
| CN203834511U (en) * | 2014-04-24 | 2014-09-17 | 浙江省交通工程建设集团第三交通工程有限公司 | Bolting-grouting retaining wall with specially-shaped section |
| CN111058463A (en) * | 2019-12-29 | 2020-04-24 | 中铁二院工程集团有限责任公司 | Rock steep slope high cantilever slope-collecting reinforcing structure and construction method |
| CN111218870A (en) * | 2019-11-22 | 2020-06-02 | 中国一冶集团有限公司 | New and old roadbed splicing structure for road widening and construction method thereof |
| CN211227883U (en) * | 2019-12-04 | 2020-08-11 | 中铁二院工程集团有限责任公司 | Rock foundation existing high-speed rail fine-grained soil filling embankment side width structure |
| CN211522703U (en) * | 2019-12-31 | 2020-09-18 | 石家庄冀星路桥工程设计有限公司 | Wide structure is pieced together to road bed |
-
2021
- 2021-05-17 CN CN202110531956.4A patent/CN113308954B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007297805A (en) * | 2006-04-28 | 2007-11-15 | Kankyo Kogaku Kk | Civil engineering structure and construction material therefor |
| CN102352632A (en) * | 2011-07-29 | 2012-02-15 | 重庆大学 | Anchor rod sheet pile combined structure and method for reinforcing high filling body on one side of slope |
| CN203834511U (en) * | 2014-04-24 | 2014-09-17 | 浙江省交通工程建设集团第三交通工程有限公司 | Bolting-grouting retaining wall with specially-shaped section |
| CN111218870A (en) * | 2019-11-22 | 2020-06-02 | 中国一冶集团有限公司 | New and old roadbed splicing structure for road widening and construction method thereof |
| CN211227883U (en) * | 2019-12-04 | 2020-08-11 | 中铁二院工程集团有限责任公司 | Rock foundation existing high-speed rail fine-grained soil filling embankment side width structure |
| CN111058463A (en) * | 2019-12-29 | 2020-04-24 | 中铁二院工程集团有限责任公司 | Rock steep slope high cantilever slope-collecting reinforcing structure and construction method |
| CN211522703U (en) * | 2019-12-31 | 2020-09-18 | 石家庄冀星路桥工程设计有限公司 | Wide structure is pieced together to road bed |
Cited By (1)
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| CN114318982A (en) * | 2021-11-30 | 2022-04-12 | 中南大学 | Foam light soil supporting structure for building large-area terrace |
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