CN104195911A - Widened embankment structure with beside-water cliff high retaining wall fill section and construction method of widened embankment structure - Google Patents
Widened embankment structure with beside-water cliff high retaining wall fill section and construction method of widened embankment structure Download PDFInfo
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- CN104195911A CN104195911A CN201410425892.XA CN201410425892A CN104195911A CN 104195911 A CN104195911 A CN 104195911A CN 201410425892 A CN201410425892 A CN 201410425892A CN 104195911 A CN104195911 A CN 104195911A
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- 238000010276 construction Methods 0.000 title claims abstract description 63
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- 230000003014 reinforcing Effects 0.000 claims description 35
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 17
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Classifications
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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
Abstract
The invention relates to a widened embankment structure with a beside-water cliff high retaining wall fill section. The widened embankment structure is mainly composed of an original pavement structure, a transverse connecting reinforcement cage, grouted stiffeners, a new widened part pavement structure, a diagonal brace, a mortar rubble slope, a reinforced concrete continuous slab and a pre-stressed pipe pile, wherein the reinforced concrete continuous slab and the diagonal brace are arranged on the top of the pre-stressed pipe pile; one end of the diagonal brace is connected with the top of the pre-stressed pipe pile, while the other end of the diagonal brace is connected with a panel of an existing cantilever retaining wall; the grouted stiffeners are arranged on the base plate of the existing cantilever retaining wall and the bottom of the reinforced concrete continuous slab; the transverse connecting reinforcement cage is arranged between the panel of the existing cantilever retaining wall and an new widened embankment; a waterproof layer is paved on the upper parts of the reinforced concrete continuous slab and the grouted stiffeners, and a light embankment and the new widened part pavement structure are orderly cast on the waterproof layer; a slope protecting waterproof layer and the mortar rubble slope are arranged outside the slope of the new widened part pavement structure. The widened embankment structure with the beside-water cliff high retaining wall fill section is used for effectively solving the problem that the widening construction cannot be implemented as the existing cantilever retaining wall cannot be removed.
Description
Technical field
The present invention relates to a kind of Widening Embankment structure, particularly the high barricade embankment of a kind of suspended wall near water section Widening Embankment structure and construction method.Belong to highway engineering field, be applicable to old road reconstruction and extension project, be specially adapted to the high barricade embankment of suspended wall widening project near water.
Background technology
In recent years, along with developing rapidly of China's economy, the traffic volume cumulative year after year of road, underestimates the rapid growth of traffic owing to building in early days road, the road that some operation amounts are large has presented the situation that the traffic volume is saturated, and communications and transportation is had a strong impact on.For meeting growing traffic and the requirement of social development, existing road widening has been become to inevitable.
For old road dike, it is the engineering that the high barricade embankment of suspended wall section is widened, normally be open to traffic in situation, carry out the Widening Construction of embankment, because being ensures that the stability of old road dike and normal safety are open to traffic, while widening, the high barricade of suspended wall reinforcement cannot be once or complete removal, therefore cannot carry out the old and new's embankment concatenation construction according to traditional step excavation.Stability, uniformity, intensity and compaction rate due to new and old roadbed in widening of subgrade engineering are different, new and old roadbed can produce different sedimentations, thereby can cause that road surface occurs longitudinal crack along seam, it should be to handle the ground of coupling section of the new and old road position well that roadbed is widened the problem mainly solving in processing procedure, strengthens the bond strength of new and old roadbed.
Conventionally because the Settlement Consolidation of old road roadbed is basicly stable, and the new subgrade settlement time is short, and new and old roadbed junction will produce differential settlement, thereby produces longitudinal crack.The differential settlement of new and old roadbed causes cement concrete slab under load action, to produce disconnected plate, and asphalt concrete pavement produces reflection crack, and driving quality is brought to very large impact, strengthens cost of transportation, even entail dangers to traffic safety.Although have some in engineering, can be used for solving the measure of old road widened section relative settlement problem, the applied in any combination of various measures for controlling embankment later stage differential deformation, the globality that strengthens new and old embankment binding site has positive effect, but existing measure is large for embankment height, relative settlement is controlled and required high section to be difficult to be suitable for.
The current existing a kind of Widening Embankment of highway near water structure (ZL:201310561704.1), is formed by the combination reinforced structure of outside water proof maintaining pile and inner side.Though this structure can improve the globality of widening highway subgrade under suitable engineering specifications, larger to the training works of former road surface structare layer, during oblique grouting and reinforcing body construction, there is certain risk, be unsuitable for the high barricade embankment of suspended wall widening project near water.
In sum, although the method for more existing punishment soft soil roadbed settlement abnormal problems in subgrade construction, each treatment measures, method have obtained good consolidation effect under suitable engineering specifications, but working procedure is comparatively complicated loaded down with trivial details mostly, and some sections still there will be the abnormal problem of sedimentation in the later stage.
Given this, for the relative settlement of effectively controlling the old and new's embankment after the road widening impact on road structure, reduce the differential settlement between new and old roadbed, need badly at present a kind of the old and new's of enhancing embankment of invention compatible deformation and stability, prevent that extraneous water body from infiltrating, improving the high barricade embankment of suspended wall near water section Widening Embankment structure and the construction method of new Widening Embankment anti-floating ability.
Summary of the invention
The object of the present invention is to provide a kind of the old and new's of enhancing embankment compatible deformation and stability, prevent that extraneous water body from infiltrating, improving the high barricade embankment of suspended wall near water section Widening Embankment structure and the construction method of new Widening Embankment anti-floating ability.
In order to realize above-mentioned technical purpose, the present invention has adopted following technical scheme:
The high barricade embankment of a kind of suspended wall near water section Widening Embankment structure, it is characterized in that, mainly by former road structure, laterally connecting reinforcement cage, grouting and reinforcing body, newly widen part road structure, oblique support, mortar rubble masonry pavement, Reinforced Concrete Continuous Plate, pile for prestressed pipe and form; Pile for prestressed pipe top is provided with Reinforced Concrete Continuous Plate and oblique support, and described oblique support one end is connected with pile for prestressed pipe top, and the other end is connected with former cantilever retaining wall panel; At the bottom of former cantilever retaining wall base plate and Reinforced Concrete Continuous Plate, grouting and reinforcing body is set; Between former cantilever retaining wall panel and new Widening Embankment, be provided with horizontal connecting reinforcement cage; Waterproofing course is laid on Reinforced Concrete Continuous Plate and grouting and reinforcing body top, builds successively light road bank and newly widen part road structure on it, and newly widening part road structure side slope outer setting has bank protection waterproofing course and mortar rubble masonry pavement.
In described pile for prestressed pipe, Anti-floating reinforcing steel bar is set, Anti-floating reinforcing steel bar one end is connected with the steel plate pile top of pile for prestressed pipe, and one end is connected with pile for prestressed pipe upper head plate, and upper head plate diameter is bigger compared with pile for prestressed pipe external diameter.
Described pile for prestressed pipe top arranges Reinforced Concrete Continuous Plate, and Reinforced Concrete Continuous Plate surface arranges connecting reinforcement.
The upper head plate of described pile for prestressed pipe is placed in Reinforced Concrete Continuous Plate, and upper head plate top is provided with end plate connecting reinforcement.
Described grouting and reinforcing body is that high-pressure slip-casting forms between the high barricade of cantilever and continuous-reinforced slab.
Described oblique be supported for reinforced concrete support or steel support, be provided with anti-floating tension rib in oblique support.
Described cantilever retaining wall panel is provided with square or the quincunx hole of drawing, and there is expanded hole bottom, and laterally connecting reinforcement cage is implanted and drawn in hole, and one end is stretched in new Widening Embankment, and the other end stretches in former dike, and adopts concrete casting sealing.
The present invention also provides the construction method of the high barricade embankment of a kind of suspended wall near water section Widening Embankment structure, comprises following construction sequence:
Before step 1, construction, prepare: clear up former side slope of embankment, organizing construction's equipment is marched into the arena, and cofferdam is set and carries out treatment of soft foundation;
Step 2, prestressing pipe pile construction: according to designing requirement, arrange stake position, in pile for prestressed pipe steel plate pile top, Anti-floating reinforcing steel bar is set, and carry out prestressing pipe pile construction, Anti-floating reinforcing steel bar is applied to prestressing force, and adopting ground tackle to be fixed on pile for prestressed pipe upper head plate, pile for prestressed pipe upper head plate is reserved end plate connecting reinforcement;
Step 3, oblique Construction of Supporting: on pile for prestressed pipe and former cantilever retaining wall panel, carry out oblique Construction of Supporting;
Step 4, steel concrete junction plate is set: at the downward hand excavation 200mm～500mm of design attitude, install template, the construction of steel concrete junction plate is carried out in assembling reinforcement;
Step 5, grouting and reinforcing body construction: between cantilever retaining wall base plate and Reinforced Concrete Continuous Plate, carry out high-pressure slip-casting and form grouting and reinforcing body, grouting and reinforcing body top mark is high high consistent with steel concrete junction plate top mark;
Step 6, lay waterproofing course: the water layer of setting up defences on grouting and reinforcing body and steel concrete junction plate upper berth;
Step 7, laterally connecting reinforcement cage construction: on cantilever retaining wall panel, according to square or quincunx evenly drawing behind hole, bottom arranges expanded hole, implant horizontal connecting reinforcement cage behind clear hole, and adopt concrete casting sealing;
Step 8, light road bank construction: set up and enclose template and build cellular concrete and form light road bank;
Step 9, outer slope construction: side slope is carried out bank protection construction of waterproof layer outside;
Step 10, road surface structare layer construction: manual demolition former suspended wall retaining wall panel and oblique support surpass former embankment design absolute altitude part, and former road structure is renovated into stepped ramp type, widen the construction of part road structure after laying high-strength degree geo-grid.
Step 11, follow-up construction: according to follow-up constructions such as designing requirement construction side slope guardrail, gutter, side slope protection face and afforestation vegetations.
the present invention has following characteristics and beneficial effect:
(1) between cantilever retaining wall base plate and Reinforced Concrete Continuous Plate, carry out high-pressure slip-casting and form grouting and reinforcing body, grouting and reinforcing body and Reinforced Concrete Continuous Plate be used in combination the bonding strength that both can strengthen the old and new's embankment bottom, prevent cantilever retaining wall wall base plate and Reinforced Concrete Continuous Plate joining place generation differential deformation, also can improve the supporting capacity of embankment.
(2) Anti-floating reinforcing steel bar is set in pile for prestressed pipe, set after pile for prestressed pipe, carry out Anti-floating reinforcing steel bar to apply prestressing force, the combination setting of Anti-floating reinforcing steel bar and pile for prestressed pipe upper head plate, Reinforced Concrete Continuous Plate can effectively solve the anti-floating problem of light road bank.
(3) waterproofing course of grouting and reinforcing body, Reinforced Concrete Continuous Plate and outer side slope setting can cut off from many levels, extend the path that extraneous water body infiltrates embankment, prevents that embankment immersion from destroying.
(4) horizontal effective guarantee the has been set compatible deformation of the old and new's embankments and the stability of new embankment of connecting reinforcement cage.
(5) former road surface structare layer is excavated into small stair shape, adopt high-intensity geo-grid to process thereon, strengthened the bond strength of the old and new's roadbeds, prevent reflection cracking in a pavement.
(6) anti-floating tension rib is set in oblique support, has strengthened the switching performance of oblique support and light road bank, also play anti-floating effect.
The present invention efficiently solves former cantilever retaining wall cannot remove a difficult problem of carrying out Widening Construction, can normally be open to traffic in situation at original path, carry out the Widening Construction of embankment, not only can strengthen the compatible deformation of the old and new's embankment and stability, but also prevent that extraneous water body from infiltrating, improving the anti-floating ability of new Widening Embankment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's high barricade embankment of suspended wall near water section Widening Embankment structure;
In figure: the former road structure of 1-, 2-expanded hole, the horizontal connecting reinforcement cage of 3-, 4-concrete, the former cantilever retaining wall panel of 5-, the former cantilever retaining wall base plate of 6-, 7-grouting and reinforcing body, 8-newly widens part road structure, 9-bank protection waterproofing course, the oblique support of 10-, 11-mortar rubble masonry pavement, 12-connecting reinforcement, 13-waterproofing course, 14-Reinforced Concrete Continuous Plate, 15-pile for prestressed pipe upper head plate, 16-end plate connecting reinforcement, 17-pile for prestressed pipe, 18-Anti-floating reinforcing steel bar, the original soil body of 19-, 20-steel plate pile top, 21-suspended wall retaining wall panel is removed part, 22-anti-floating tension rib.
Specific embodiment
The design and construction technical requirements of pile for prestressed pipe in present embodiment, reinforcing bar binding, Plate Welding construction technical requirement, be not repeated in the present embodiment such as concrete design and construction requirement, the concrete embodiment that the present invention relates to structure of setting forth.
Fig. 1 is the structural representation of the present invention's high barricade embankment of suspended wall near water section Widening Embankment structure.
With reference to the high barricade embankment of the suspended wall near water section Widening Embankment structure shown in Fig. 1, mainly by former road structure 1, laterally connecting reinforcement cage 3, grouting and reinforcing body 7, newly widen part road structure 8, oblique support 10, mortar rubble masonry pavement 11, Reinforced Concrete Continuous Plate 14, pile for prestressed pipe 17, the original soil body 19 and form.
Pile for prestressed pipe 17 tops are provided with Reinforced Concrete Continuous Plate 14 and oblique support 10, oblique support 10 one end are connected with pile for prestressed pipe 17 tops, the other end is connected with former cantilever retaining wall panel 5, in oblique support 10, be provided with anti-floating tension rib 22, anti-floating tension rib 22 adopts the HRB335 reinforcing bar that diameter is 20mm, and steel strength grade is Q345; At former cantilever retaining wall base plate 6 and 14 ends of Reinforced Concrete Continuous Plate, grouting and reinforcing body 7 is set; Between former cantilever retaining wall panel 5 and new Widening Embankment, be provided with horizontal connecting reinforcement cage 3; Waterproofing course 13 is laid on Reinforced Concrete Continuous Plate 14 and grouting and reinforcing body 7 tops, builds successively light road bank and newly widen part road structure 8 on it, and newly widening part road structure side slope outer setting has bank protection waterproofing course 9 and mortar rubble masonry pavement 11.
First clear up former side slope of embankment, organizing construction's equipment is marched into the arena, and cofferdam is set and by water pump, draws water, and bottom, part river course pasture and water, mud are newly widened in cleaning, and mechanical equivalent of light excavation, after projected depth, adopts Static pressure pile driver to set pile for prestressed pipe 17.Pile for prestressed pipe 17 adopts the prestressed high-strength concrete pile of external diameter 600mm, wall thickness 110mm, length 12000mm, steel plate pile top 20 adopts cross-shaped steel plate pile tip, Anti-floating reinforcing steel bar 18 is set in steel plate pile top 20, Anti-floating reinforcing steel bar 18 bottoms and steel plate pile top 20 are welded to connect, top through supporting plate, fill out after core concrete applies prestressing force with pile for prestressed pipe upper head plate 15 and be connected by ground tackle, Anti-floating reinforcing steel bar adopts the HRB335 reinforcing bar that diameter is 30mm, and steel strength grade is Q345.Pile for prestressed pipe 17 tops arrange pile for prestressed pipe upper head plate 15, and pile for prestressed pipe upper head plate 15 is rounded, and external diameter is 1000mm.Pile for prestressed pipe upper head plate 15 surfaces are provided with end plate connecting reinforcement 16.End plate connecting reinforcement 16 adopts the indented bars that steel strength grade is Q345.
After pile for prestressed pipe 17 has set, carry out the construction of oblique support 10, oblique support 10 one end are connected with pile for prestressed pipe 17 tops, and the other end is connected with former cantilever high gear shingle nail 5; Oblique support 10 can be reinforced concrete support or steel supports.At the downward hand excavation 200mm～500mm of design attitude, install template, 14 constructions of steel concrete junction plate are carried out in assembling reinforcement, Reinforced Concrete Continuous Plate 14 is from the reserved 500mm-1000mm of cantilever retaining wall base plate 6, Reinforced Concrete Continuous Plate 14 surfaces arrange connecting reinforcement 12, and connecting reinforcement 12 stretches out Reinforced Concrete Continuous Plate 14 top 300mm～500mm.Reinforced Concrete Continuous Plate 14 strength grade of concrete are C30, and connecting reinforcement 12 adopts the indented bars that strength grade is Q345.
According to designing requirement, the reserved part between cantilever retaining wall base plate 6 and Reinforced Concrete Continuous Plate 14 is carried out high-pressure slip-casting and is carried out grouting and reinforcing body 7, and grouting and reinforcing body 7 absolute altitudes are consistent with steel concrete junction plate 14 absolute altitudes.
On cantilever retaining wall panel 5, according to square or quincunx evenly drawing behind hole, there is expanded hole 2 bottom, implants horizontal connecting reinforcement cage 3, and adopt concrete 4 to recharge sealing behind clear hole.Laterally the diameter of connecting reinforcement cage 3 is 500mm, and the longitudinal screw reinforcing bar of 12 Ф 16mm, strength grade Q345 is set, and spiral stirrup adopts the plain steel-bar that Ф 8mm, strength grade are HPB300.The strength grade of concrete of concrete 4 is C30.
In Reinforced Concrete Continuous Plate 14 and grouting and reinforcing body 7 tops, lay waterproofing course 13, waterproofing course adopts needle punched non-woven fabrics and the compound non-woven geotextile of PE film, and specification is 300g/m
2, design parameter requires referring to table 1; Lap length between adjacent geotextiles is not less than 200mm.
Table 1 waterproof geotextiles design parameter table
| Mass area ratio deviation | Thickness | Amplitude error | Ultimate strength | Elongation at break | CBR bursting strength | Effective aperture | Tearing brute force |
| 7% | ≥2.4 mm | -0.5% | ≥9.5? kN/m | 25～100% | ≥1.5kN | 0.07～0.2mm | ≥0.24 kN |
After Construction for waterproofing treatment completes, set up and enclose template and build light road bank, light road bank can adopt cellular concrete, EPS light filler or flyash filler.
Side slope is done bank protection waterproofing course 9 and mortar rubble masonry pavement 11 outside, remove former suspended wall retaining wall panel and oblique support and surpass former embankment design absolute altitude part 21, and former road structure 1 is renovated into stepped ramp type, vertical height and the transverse width of step are 400mm, establish 3% leaning angle on step surface.After laying high-strength degree geo-grid, widen part pavement construction.
The main construction sequence of the section of the high barricade embankment of suspended wall near water Widening Embankment structure is as follows:
Before step 1, construction, prepare: clear up former side slope of embankment, organizing construction's equipment is marched into the arena, and cofferdam is set and carries out treatment of soft foundation;
Step 2, pile for prestressed pipe 17 constructions: according to designing requirement, arrange stake position, in pile for prestressed pipe steel plate pile top 20, Anti-floating reinforcing steel bar 18 is set, and carry out pile for prestressed pipe 17 and construct, Anti-floating reinforcing steel bar 18 is applied to prestressing force, and adopt ground tackle to be fixed on pile for prestressed pipe upper head plate 15, the reserved end plate connecting reinforcement 16 of pile for prestressed pipe upper head plate 15;
Step 3, oblique support 10 constructions: on pile for prestressed pipe 17 and former cantilever retaining wall panel 5, carry out oblique support 10 constructions;
Step 4, steel concrete junction plate 14 is set: at the downward hand excavation 200mm～500mm of design attitude, install template, 14 constructions of steel concrete junction plate are carried out in assembling reinforcement;
Step 5,7 constructions of grouting and reinforcing body: according to designing requirement, carry out high-pressure slip-casting and form grouting and reinforcing body 7 between cantilever retaining wall base plate 6 and Reinforced Concrete Continuous Plate 14, grouting and reinforcing body 7 top marks are high high consistent with steel concrete junction plate top mark;
Step 6, laying waterproofing course 13: the water layer 13 of setting up defences on grouting and reinforcing body 7 and steel concrete junction plate 14 upper berths;
Step 7, laterally connecting reinforcement cage 3 constructions: on cantilever retaining wall panel 5, according to square or quincunx evenly drawing behind hole, bottom arranges expanded hole 2, implants horizontal connecting reinforcement cage 3, and adopt concrete 4 to recharge sealing behind clear hole;
Step 8, light road bank construction: set up and enclose template and build cellular concrete and form light road bank;
Step 9, outer slope construction: side slope is carried out bank protection waterproofing course 9 and mortar rubble masonry pavement 11 constructions outside;
Step 10, road surface structare layer construction: manual demolition former suspended wall retaining wall panel and oblique support surpass former embankment design absolute altitude part, and former road structure 1 is renovated into stepped ramp type, widen 8 constructions of part road structure after laying high-strength degree geo-grid.
Step 11, follow-up construction: according to follow-up constructions such as designing requirement construction side slope guardrail, gutter, side slope protection face and afforestation vegetations.
Claims (8)
1. the section of the high barricade embankment of a suspended wall near water Widening Embankment structure, it is characterized in that, mainly by former road structure, laterally connecting reinforcement cage, grouting and reinforcing body, newly widen part road structure, oblique support, mortar rubble masonry pavement, Reinforced Concrete Continuous Plate, pile for prestressed pipe and form; Pile for prestressed pipe top is provided with Reinforced Concrete Continuous Plate and oblique support, and described oblique support one end is connected with pile for prestressed pipe top, and the other end is connected with former cantilever retaining wall panel; At the bottom of former cantilever retaining wall base plate and Reinforced Concrete Continuous Plate, grouting and reinforcing body is set; Between former cantilever retaining wall panel and new Widening Embankment, be provided with horizontal connecting reinforcement cage; Waterproofing course is laid on Reinforced Concrete Continuous Plate and grouting and reinforcing body top, builds successively light road bank and newly widen part road structure on it, and newly widening part road structure side slope outer setting has bank protection waterproofing course and mortar rubble masonry pavement.
2. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, it is characterized in that, in described pile for prestressed pipe, Anti-floating reinforcing steel bar is set, Anti-floating reinforcing steel bar one end is connected with the steel plate pile top of pile for prestressed pipe, one end is connected with pile for prestressed pipe upper head plate, and upper head plate diameter is bigger compared with pile for prestressed pipe external diameter.
3. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, is characterized in that described pile for prestressed pipe top arranges Reinforced Concrete Continuous Plate, and Reinforced Concrete Continuous Plate surface arranges connecting reinforcement.
4. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, it is characterized in that the upper head plate of described pile for prestressed pipe is placed in Reinforced Concrete Continuous Plate, and upper head plate top is provided with end plate connecting reinforcement.
5. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, is characterized in that described grouting and reinforcing body is that high-pressure slip-casting forms between the high barricade of cantilever and continuous-reinforced slab.
6. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, is characterized in that; Described oblique be supported for reinforced concrete support or steel support, be provided with anti-floating tension rib in oblique support.
7. the high barricade embankment of suspended wall near water according to claim 1 section Widening Embankment structure, it is characterized in that being provided with square or the quincunx hole of drawing on described cantilever retaining wall panel, side end has expanded hole, laterally connecting reinforcement cage is implanted and is drawn in hole, one end is stretched in new Widening Embankment, the other end stretches in former dike, and adopts concrete casting sealing.
8. according to the construction method of the section of the high barricade embankment of suspended wall near water Widening Embankment structure described in the arbitrary claim of claim 1～7, it is characterized in that comprising following construction sequence:
Before step 1, construction, prepare: clear up former side slope of embankment, organizing construction's equipment is marched into the arena, and cofferdam is set and carries out treatment of soft foundation;
Step 2, prestressing pipe pile construction: according to designing requirement, arrange stake position, in pile for prestressed pipe steel plate pile top, Anti-floating reinforcing steel bar is set, and carry out prestressing pipe pile construction, Anti-floating reinforcing steel bar is applied to prestressing force, and adopting ground tackle to be fixed on pile for prestressed pipe upper head plate, pile for prestressed pipe upper head plate is reserved end plate connecting reinforcement;
Step 3, oblique Construction of Supporting: on pile for prestressed pipe and former cantilever retaining wall panel, carry out oblique Construction of Supporting;
Step 4, steel concrete junction plate is set: at the downward hand excavation 200mm～500mm of design attitude, install template, the construction of steel concrete junction plate is carried out in assembling reinforcement;
Step 5, grouting and reinforcing body construction: between cantilever retaining wall base plate and Reinforced Concrete Continuous Plate, carry out high-pressure slip-casting and form grouting and reinforcing body, grouting and reinforcing body top mark is high high consistent with steel concrete junction plate top mark;
Step 6, lay waterproofing course: the water layer of setting up defences on grouting and reinforcing body and steel concrete junction plate upper berth;
Step 7, laterally connecting reinforcement cage construction: on cantilever retaining wall panel, according to square or quincunx evenly drawing behind hole, bottom arranges expanded hole, implant horizontal connecting reinforcement cage behind clear hole, and adopt concrete casting sealing;
Step 8, light road bank construction: set up and enclose template and build cellular concrete and form light road bank;
Step 9, outer slope construction: side slope is carried out bank protection construction of waterproof layer outside;
Step 10, road surface structare layer construction: manual demolition former suspended wall retaining wall panel and oblique support surpass former embankment design absolute altitude part, and former road structure is renovated into stepped ramp type, widen the construction of part road structure after laying high-strength degree geo-grid;
Step 11, follow-up construction: according to follow-up constructions such as designing requirement construction side slope guardrail, gutter, side slope protection face and afforestation vegetations.
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| CN104894926A (en) * | 2015-06-09 | 2015-09-09 | 中铁第一勘察设计院集团有限公司 | Retaining structure on existing railway high embankment and construction method thereof |
| CN105937196A (en) * | 2016-05-24 | 2016-09-14 | 安徽省交通建设有限责任公司 | Subgrade pile-plank type widening structure and construction method thereof |
| CN106592527A (en) * | 2017-01-04 | 2017-04-26 | 成都佳美嘉科技有限公司 | Side slope structure for water-conservancy capital construction |
| CN107366302A (en) * | 2017-06-27 | 2017-11-21 | 华恒建设集团有限公司 | A kind of construction technology of reinforced concrete retaining wall |
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| CN105937196A (en) * | 2016-05-24 | 2016-09-14 | 安徽省交通建设有限责任公司 | Subgrade pile-plank type widening structure and construction method thereof |
| CN106592527A (en) * | 2017-01-04 | 2017-04-26 | 成都佳美嘉科技有限公司 | Side slope structure for water-conservancy capital construction |
| CN107366302B (en) * | 2017-06-27 | 2019-02-05 | 华恒建设集团有限公司 | A kind of construction technology of reinforced concrete retaining wall |
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| CN109252542A (en) * | 2018-11-14 | 2019-01-22 | 山东大学 | A kind of root pile lightweight barricade and its construction method for road widening |
| CN111155385A (en) * | 2020-01-06 | 2020-05-15 | 浙江大学城市学院 | Treatment structure and construction method for newly added retaining wall of active large-deformation roadbed |
| CN111749288A (en) * | 2020-07-31 | 2020-10-09 | 安徽省交通建设股份有限公司 | Load-reducing heightening structure of existing retaining wall and construction method thereof |
| CN112709230A (en) * | 2021-01-19 | 2021-04-27 | 中铁五局集团机械化工程有限责任公司 | Method for dismantling roadbed slope prestressed anchor cable frame beam |
| CN112709230B (en) * | 2021-01-19 | 2022-03-01 | 中铁五局集团机械化工程有限责任公司 | Method for dismantling roadbed slope prestressed anchor cable frame beam |
| CN112921727A (en) * | 2021-01-28 | 2021-06-08 | 攀钢集团工程技术有限公司 | High and steep slope road widening construction method |
| CN113308957A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method of retaining wall light soil wide-spliced embankment |
| CN113308953A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method for widening embankment by utilizing foam concrete of existing retaining wall |
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