CN109403371A - A kind of Steep Slope Embankment retaining structure and construction method - Google Patents

A kind of Steep Slope Embankment retaining structure and construction method Download PDF

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Publication number
CN109403371A
CN109403371A CN201811268785.5A CN201811268785A CN109403371A CN 109403371 A CN109403371 A CN 109403371A CN 201811268785 A CN201811268785 A CN 201811268785A CN 109403371 A CN109403371 A CN 109403371A
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CN
China
Prior art keywords
retaining
anchor cable
plate
anchor
slopes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811268785.5A
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Chinese (zh)
Inventor
康承磊
谢淼
裴利华
徐永浩
贺敏杰
张健
焦世杰
李晓娜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Siyuan Survey and Design Group Co Ltd
Southwest Survey and Design Co Ltd of China Railway Siyuan Survey and Design Group Co Ltd
Original Assignee
China Railway Siyuan Survey and Design Group Co Ltd
Southwest Survey and Design Co Ltd of China Railway Siyuan Survey and Design Group Co Ltd
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Publication date
Application filed by China Railway Siyuan Survey and Design Group Co Ltd, Southwest Survey and Design Co Ltd of China Railway Siyuan Survey and Design Group Co Ltd filed Critical China Railway Siyuan Survey and Design Group Co Ltd
Priority to CN201811268785.5A priority Critical patent/CN109403371A/en
Publication of CN109403371A publication Critical patent/CN109403371A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations
    • E02D27/14Pile framings, i.e. piles assembled to form the substructure
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/02Retaining or protecting walls
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/02Retaining or protecting walls
    • E02D29/0258Retaining or protecting walls characterised by constructional features
    • E02D29/0275Retaining or protecting walls characterised by constructional features cast in situ
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/76Anchorings for bulkheads or sections thereof in as much as specially adapted therefor

Abstract

The present invention relates to abrupt slope road field, a kind of Steep Slope Embankment retaining structure and construction method are disclosed, wherein retaining structure includes: cantilever retaining wall, foundation pile and anchor cable;Cantilever retaining wall includes bottom plate and the wall above bottom plate, foundation pile is arranged in the lower section of bottom plate, in the bottom insertion slopes of foundation pile, first anchor cable hole is set on wall, one end of anchor cable is connected at the first anchor cable hole with wall, in the second anchor cable hole in the other end insertion slopes of anchor cable and is fixed in the steady soil or basement rock of slopes.A kind of Steep Slope Embankment retaining structure provided by the invention and construction method, setting pile foundation are supported cantilever retaining wall, can solve the problems, such as that foundation bearing is hypodynamic, improve the resistance to capsizing and resistant slide ability of the retaining structure;Anchor cable is set and connects wall and slopes, retaining walls back portion soil pressure can be offset, further increase the resistance to capsizing of retaining wall and the overall stability of retaining structure.

Description

A kind of Steep Slope Embankment retaining structure and construction method
Technical field
The present invention relates to abrupt slope road fields, more particularly to a kind of Steep Slope Embankment retaining structure and construction method.
Background technique
It is pile foundation joist retaining wall that more combination retaining structure is applied in existing Steep Slope Embankment retaining structure.Such group Conjunction form has expanded the scope of application of retaining wall, but the form of retaining wall is mainly balance weight retaining wall, since load retaining wall is kept off Cob wall, which still needs, maintains homeostasis by certain self weight, therefore cross section expanded letter amount is big.
Traditional retaining structure of diversified forms is used widely in railway, highway construction project at present, but more It is big come more height of embankment and the subgrade engineering of upright closing slope is needed to appear in engineering construction.To meet mountain area steep slope region Roadbed makes full use of traditional retaining structure, maximizes favourable factors and minimizes unfavourable ones to the stabilization of retaining engineering and the requirements at the higher level of malformation, advantage Complementation, it is necessary to seek a kind of retaining structure suitable for extremely difficult steep slope region, to reduce brush slope, improve supporting and retaining system ability, contracting Minibridge beam length reduces land occupation, is more conducive to water and soil conservation.
Application No. is 200820223651 to disclose a kind of Cantilevered type retaining wall reinforcement composite structure, by after wall In filler stratification setting TGXG lacing wire, improve retaining wall anchorage and while in a disguised form increase the size of bottom plate, from And resistant slide power is improved, to reduce quantity of masonry.But the anchorage and resistant slide of retaining wall are improved by such method Power is limited, and can not solve the problems, such as that foundation bearing capacity is unsatisfactory for base stress under conditions of not reducing base plate size, especially When soft soil foundation, karst region and railway, highway are invaded in limit roadbed and applied with certain limitation, the type earth-retaining is hindered The further genralrlization application of wall.
Existing retaining wall improves foundation bearing capacity, anti-overturning and stability, meeting by increasing base plate size mostly Cause project amount larger, higher cost.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of Steep Slope Embankment retaining structure and construction methods, for solving or partially solving now Some retaining walls improve foundation bearing capacity, anti-overturning and stability by increasing base plate size mostly, will lead to project amount It is larger, higher cost.
(2) technical solution
In order to solve the above-mentioned technical problem, according to a first aspect of the present invention, a kind of Steep Slope Embankment retaining structure is provided, is wrapped It includes: cantilever retaining wall, foundation pile and anchor cable;The cantilever retaining wall includes bottom plate and the wall above bottom plate, institute The lower section setting foundation pile of bottom plate is stated, the bottom of the foundation pile is inserted into slopes, and the first anchor cable hole, institute are arranged on the wall The one end for stating anchor cable is connected at first anchor cable hole with the wall, second in the other end insertion slopes of the anchor cable In anchor cable hole and it is fixed in the steady soil or basement rock of slopes.
On the basis of above scheme, the wall is located at the top of the plate outer side, the inside insertion of the bottom plate Inside slopes, row's foundation pile is respectively set in the bottom of the bottom plate two sides, the foundation pile is along the length side of the bottom plate It is arranged to interval.
On the basis of above scheme, the wall is located at the top of the plate outer side, the inside insertion of the bottom plate Inside slopes, one row's foundation pile is set along the length direction interval of the bottom plate in the bottom of the plate outer side, at the bottom Row's anchor pole is arranged along the length direction interval of the bottom plate in bottom on the inside of plate, the top of the anchor pole pass through the bottom plate with The bottom plate is connected, bottom end is inserted and fixed in slopes.
On the basis of above scheme, two rows of anchor cables are set along the vertical direction on the wall;First anchor cable hole with The anchor cable is correspondingly arranged and first anchor cable hole is arranged close to the top of the wall;The anchor cable relative level is inclined Angle is 10-20 °.
On the basis of above scheme, the anchor pole is arranged perpendicular to the bottom plate;The anchor pole is located at soil inside slopes Length in layer is more than or equal to 4m;The anchor pole is located at the length in slopes interior rock layer more than or equal to 3m;In the slopes The depth of bolthole and the difference of Soil Anchor Design length are more than or equal to 0.5m.
On the basis of above scheme, the metope of the wall is vertical ratio of slope, and the ratio of slope of the wall wall back is 1: 0.1-1:0.3;The width of the wall top surface is more than or equal to 0.2m.
On the basis of above scheme, the distance between two rows of foundation piles are as follows: 2-4m;It is adjacent in same row's foundation pile The distance between two foundation piles are as follows: 4-6m;The stake diameter of the foundation pile is 0.8-1.5m;The stake top of the foundation pile protrudes into bottom The length of plate is 5-20cm.
On the basis of above scheme, the every 9-11m of cantilever retaining wall is a section, two adjacent sections cantilever retaining wall Between expansion joint is set, the width at the expansion joint is 20-30mm;Elastic water-proofing material is filled in the expansion joint.
On the basis of above scheme, deviations are less than etc. when first anchor cable hole and second anchor cable hole are constructed In 20.0mm, degree of skewness is less than or equal to 2%;The depth of second anchor cable hole and the difference of the anchorage cable design intubating length are greater than Equal to 0.5m;The anchorage cable stretching proof stress is less than or equal to the strength standard value of 0.65 times of steel strand wires.
According to the second aspect of the invention, a kind of Steep Slope Embankment retaining structure construction method is provided, comprising: excavation foundation stake Operation platform implements a row or two rows of foundation piles according to default spacing;Implement cantilever retaining wall: practice processes pile by section Platform, bottom plate and wall steel reinforcement cage;Drain hole, the first anchor cable hole site are reserved on wall;Then simultaneously integration pours formwork; Elastic water-proofing material is clogged in expansion joint between two adjacent sections cantilever retaining wall;On the top of corresponding foundation pile position Side slope applies the second anchor cable hole according to pre-set dimension, and removes sundries in the second anchor cable hole, temporarily closes the second anchor using stopple Suo Kong;After foundation pile, cushion cap and cantilever retaining wall concrete reach intensity requirement, if implementing row's foundation pile, Implement anchor pole;Placement in layers wall is carried on the back at backfill and loaded filter to the second anchor cable hole;Anchorage cable anchoring is applied in the second anchor cable hole It fills wall back remainder when the cement mortar in the second anchor cable hole reaches default set strength and bankets in end;Apply the first anchor Anchor pier at rope hole: anchor cable is passed through into the first anchor cable hole, is stretched to default pulling capacity step by step, locking anchor cable applies anchor pier.
(3) beneficial effect
A kind of Steep Slope Embankment retaining structure provided by the invention and construction method, setting pile foundation to cantilever retaining wall into Row support, can solve the problems, such as that foundation bearing is hypodynamic, improve the resistance to capsizing and resistant slide ability of the retaining structure;Setting Anchor cable connects wall and slopes, can offset retaining walls back portion soil pressure, further increase the resistance to capsizing of retaining wall With the overall stability of retaining structure.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of an embodiment of Steep Slope Embankment retaining structure of the present invention;
Fig. 2 is a kind of schematic diagram of another embodiment of Steep Slope Embankment retaining structure of the present invention.
Description of symbols:
1-cantilever retaining wall;11-walls;12-bottom plates;
2-foundation piles;3-anchor cables;4-slopes;
5-roadbed center lines;6-anchor poles.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance For illustrating the present invention, but it is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can To be mechanical connection, it is also possible to be electrically connected;It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
The present embodiment provides a kind of Steep Slope Embankment retaining structure according to the present invention, and with reference to Fig. 1, which includes: outstanding Arm-type retaining wall 1, foundation pile 2 and anchor cable 3;Cantilever retaining wall 1 includes bottom plate 12 and the wall 11 above bottom plate 12, bottom Foundation pile 2 is arranged in the lower section of plate 12, and the bottom of foundation pile 2 is inserted into slopes 4, and the first anchor cable hole is arranged on wall 11, anchor cable 3 One end is connected at the first anchor cable hole with wall 11, in the second anchor cable hole in the other end insertion slopes 4 of anchor cable 3 and is fixed on In the steady soil or basement rock of slopes 4.
A kind of Steep Slope Embankment retaining structure provided in this embodiment, using cantilever retaining wall 1 to abrupt slope road side side into The protection of row supporting and retaining system.Pile foundation is set in the bottom of cantilever retaining wall 1, retaining wall is supported, foundation bearing capacity can be solved Insufficient problem, improves the resistance to capsizing and resistant slide ability of the retaining structure.
The bottom plate 12 of cantilever retaining wall 1 and the cushion cap of pile foundation are closed as one.Because as Steep Slope Embankment roadbed is filled out The increase of Fang Gaodu, the height of wall 11 can be with increase, in order to guarantee the steady of cantilever retaining wall 1 in cantilever retaining wall 1 It is qualitative, phenomenon of toppling is avoided the occurrence of, setting anchor cable 3 connects wall 11 and slopes 4, reinforces to the structure of wall 11.
First anchor cable hole can be arranged close to the top of wall.3 one end of anchor cable is connected with wall 11, and the other end is inserted into slopes 4 In be fixed in the steady soil of slopes 4 or in basement rock.Connecting wall 11 and slopes 4, anchor cable 3 by setting anchor cable 3 can support The retaining walls that disappear back portion soil pressure, can be improved the resistance to capsizing of retaining wall, improve the overall stability of retaining structure.
Anchor cable 3 is set and connects wall 11 and slopes 4, is connected on joist compared to traditional anchor cable 3, wall 11 can be reinforced Closing slope effect is more applicable for the case where needing higher retaining structure.
Further, anchor cable 3 is prestress anchorage cable 3.
On the basis of the above embodiments, further, with reference to Fig. 1, wall 11 is located at the top in 12 outside of bottom plate, bottom plate Inside 12 inside insertion slopes 4, row's foundation pile 2 is respectively set in the bottom of 12 two sides of bottom plate, foundation pile 2 is along bottom plate 12 The setting of length direction interval.
A kind of Steep Slope Embankment retaining structure pile foundation plinth provided in this embodiment is double-row pile, and foundation pile 2 is reinforced concrete Soil structure.The outside of bottom plate 12 is the width direction along bottom plate 12 far from the side of slopes 4, and inside is close to the side of slopes 4. A placing of reinforcement concrete-pile is respectively set along the two sides of 12 width direction of bottom plate in the bottom of bottom plate 12.The width direction of bottom plate 12 That is the width direction of abrupt slope road;Length direction is the length direction of abrupt slope road.The roadbed center line 5 of abrupt slope road is as schemed Shown in 1.
Each placing of reinforcement concrete-pile is spaced setting along the length direction of bottom plate 12, props up bottom plate 12 and wall 11 Support.Wall 11 is in the top of bottom, close to the outside of bottom plate 12.In order to improve the stability and anti-overturning of wall 11, bottom plate In 12 inside insertion slopes 4.The inside of bottom plate 12 is fixed in slopes 4, and the anti-overturning of wall 11 can be improved.
Double-row pile, which is arranged, can further improve the stability of retaining wall, can be right because being located at the campshed of bottom plate 12 in the outer part Retaining wall is supported, can also be to bottom plate positioned at the campshed of bottom plate 12 in the inner part on the basis of being supported to retaining wall 12 inside provides downward pulling force, is fixed together to the inside of bottom plate 12 with slopes 4, improves the antidumping of retaining wall Property.
On the basis of the above embodiments, further, with reference to Fig. 2, wall 11 is located at the top in 12 outside of bottom plate, bottom plate Inside 12 inside insertion slopes 4, one row's foundation pile is set along the length direction interval of bottom plate 12 in the bottom in 12 outside of bottom plate 2, one row's anchor pole 6 is set along the length direction interval of bottom plate 12 in the bottom of 12 inside of bottom plate, the top of anchor pole 6 passes through bottom plate 12 It is connected with bottom plate 12, bottom end is inserted and fixed in slopes 4.
One campshed of 12 inside bottom of bottom plate can be replaced by anchor pole 6.Retaining structure pile foundation plinth is Single row pillars.Foundation pile 2 The outside of bottom plate 12, the i.e. position close to outside are set, can mainly be played a supportive role.Foundation pile 2 is along the length side of bottom plate 12 It is arranged to interval, bottom plate 12 and wall 11 is supported.
In the inside of bottom plate 12, slopes 4 can increase the fixed function of bottom plate 12 stability of retaining wall, improve antidumping Property.In order to further improve the anti-overturning of retaining wall, anchor pole 6 is set in the inside of bottom plate 12.Slope is fixed in 6 bottom end of anchor pole Inside body 4, apply downward pulling force to the inside of bottom plate 12, the part soil pressure of retaining walls back can be offset, meet existing mountain The demand of the higher closing slope ability of area's Steep Slope Embankment retaining structure improves supporting file height, improves the anti-horizontal loading energy of branch mark structure Power improves whole antidumping and resistant slide ability.
On the basis of the above embodiments, further, anchor pole 6 is arranged perpendicular to bottom plate 12;Anchor pole 6 is located in slopes 4 Length in portion's soil layer is more than or equal to 4m;Anchor pole 6 is located at the length in 4 interior rock layer of slopes more than or equal to 3m;Anchor in slopes 4 The difference of 6 design length of depth and anchor pole of rod aperture is more than or equal to 0.5m.
The specific setting size of anchor pole 6 is illustrated in the present embodiment.The size of the anchor pole 6 setting is conducive to anchor pole 6 It is firmly connected and fixed with slopes 4, to enhance the stability of anchor pole 6, is conducive to anchor pole 6 and preferably retaining wall application is acted on Power improves the overall stability and anti-overturning of branch mark structure, improves supporting file ability.
On the basis of the above embodiments, further, two rows of anchor cables 3 are set along the vertical direction on wall 11;First anchor Suo Kongyu anchor cable is correspondingly arranged and the first anchor cable hole is arranged close to the top of wall;The inclination angle of 3 relative level of anchor cable is 10- 20°。
Two rows anchor cable 3 is set, it is ensured that anchor cable 3 improves the stabilization of retaining wall to the stretching fixed function of wall 11 Property.First anchor cable hole is preferably placed at the centre of wall 11 by upper bit, can preferably play the effect of anchor cable 3.
3 both ends of inclination angle, that is, anchor cable of anchor cable 3 are separately connected after fixation, the angle of anchor cable 3 itself and horizontal plane.Anchor cable 3 Inclination angle be preferably 10-20 °, which not only improves the fixation of anchor cable 3, and more appropriate to the active force and direction of wall 11, Be conducive to improve the stability and supporting and retaining system ability of retaining wall.
On the basis of the above embodiments, further, between wall 11 and bottom plate 12 and bottom plate 12 and foundation pile 2 it Between be rigidly connected.Foundation pile 2 and bottom plate 12 and 11 three of wall can be integrated pouring structure, to improve the whole jail of structure Solidity.
On the basis of the above embodiments, further, the metope of wall 11 is vertical ratio of slope, the ratio of slope of 11 wall of wall back For 1:0.1-1:0.3;The width of 11 top surface of wall is more than or equal to 0.2m.This kind of structure size of wall 11, is conducive to improve Wall 11 guarantees the stability of retaining wall to the supporting and retaining system protective capacities of embankment.
On the basis of the above embodiments, further, when two campsheds is arranged, the distance between two rows of foundation piles 2 are as follows: 2-4m;Not only stable support can be carried out to retaining wall, but also is distributed in the two sides of bottom plate 12, the inside of bottom plate 12 can be played and be drawn Power guarantees the stability of retaining wall structure.
The distance between two neighboring foundation pile 2 in same row's foundation pile 2 are as follows: 4-6m;Retaining wall can be carried out steady Fixed support.The stake diameter of foundation pile 2 is 0.8-1.5m;The stake top of foundation pile 2 protrude into bottom plate 12 length be 5-20cm, it can be achieved that Firm stable support to retaining wall, and the secured connection of optimized integration stake 2 and retaining wall.
On the basis of the above embodiments, further, the every 9-11m of cantilever retaining wall 1 is a section, two adjacent sections cantilever Expansion joint is set between formula retaining wall 1, and the width at expansion joint is 20-30mm;Elastic water-proofing material is filled in expansion joint.
Pitch hemp cut or other flexible waterproof materials can be clogged in expansion joint, filling depth should be not less than 150mm.If Setting expansion joint can reduce by the secondary internal force of temperature and differential settlement generation, not only be convenient for the construction of retaining wall, but also branch can be improved Keep off the fastness of structure.
On the basis of the above embodiments, further, deviations when 3 hole of the first anchor cable and 3 hole of the second anchor cable are constructed Less than or equal to 20.0mm, degree of skewness is less than or equal to 2%;The difference of depth and anchor cable 3 the design intubating length in 3 hole of the second anchor cable is greater than Equal to 0.5m;3 control stress for prestressing of anchor cable is less than or equal to the strength standard value of 0.65 times of steel strand wires.Be conducive to improve anchor cable 3 Fastness is conducive to anchor cable 3 and preferably plays a role.
On the basis of the above embodiments, further, a kind of Steep Slope Embankment retaining structure construction method, the construction method Include: 2 operation platform of excavation foundation stake, implements a row or two rows of foundation piles 2 according to default spacing;Implement cantilevered earth-retaining by section Wall 1: 11 steel reinforcement cage of 2 cushion cap of practice processes stake, bottom plate 12 and wall;Drain hole, the first anchor cable hole location are reserved on wall 11 It sets;Then simultaneously integration pours formwork;Elastic water-proof material is clogged in expansion joint between two adjacent sections cantilever retaining wall 1 Material;Upper slope in corresponding 2 position of foundation pile applies the second anchor cable hole according to pre-set dimension, and removes the second anchor cable hole Interior sundries temporarily closes the second anchor cable hole using stopple;Reach strong to foundation pile 2, cushion cap and 1 concrete of cantilever retaining wall After degree requires, if implementing row's foundation columns 2, implement anchor pole 6;Placement in layers wall carries on the back backfill and loaded filter to the second anchor cable At hole;3 anchored end of anchor cable is applied in the second anchor cable hole, reaches default set strength to the cement mortar in the second anchor cable hole When, it fills wall back remainder and bankets;It applies the anchor pier at the first anchor cable hole: anchor cable 3 is passed through into the first anchor cable hole, step by step tensioning To default pulling capacity, locking anchor cable 3 applies anchor pier.
On the basis of the above embodiments, further, anchor cable 3 is passed through into the first anchor cable hole, is stretched to required drawing step by step Before pull out force further include: 3 axial tension value of 0.1-0.2 times of anchor cable is taken, to 3 pre- tensioning of anchor cable 1-2 times;Anchor cable 3 is designed 1.10-1.20 times of prestress value of ultra stretching.
Embodiment 1:
On the basis of the above embodiments, further, a kind of Steep Slope Embankment retaining structure mainly includes that double pile is outstanding Arm-type anchored cable earth-retaining wall, including pile foundation, cantilever retaining wall 1 and prestress anchorage cable 3.Cantilever retaining wall 1 is by 12 He of bottom plate Wall 11 above bottom plate 12 is constituted, and insole board 12 is done with pile foundation support table conjunction.The lower section of cantilever retaining wall 1 is along its length It spends direction interval and lays two rows of foundation piles 2, cantilever retaining wall 1 and pile foundation are reinforced concrete structure, cantilevered earth-retaining The top of wall 1 and pile foundation is rigidly connected.
Two rows of prestress anchorage cables 3 are laid on 1 wall 11 of cantilever retaining wall, 3 anchoring section of anchor cable is placed in the steady of abrupt slope slopes 4 Determine in soil layer or basement rock.Wall 11 will reserve anchor cable hole when constructing, and the inclination angle of prestress anchorage cable 3 is preferably 10 ° -20 °.In wall 11 Concrete strength starts tensioning, locking anchor cable 3 after reaching design strength 75%.
The specific embodiment of the retaining structure the following steps are included:
Pile foundation construction platform is first excavated on abrupt slope, can be implemented necessary provisional protection to platform side slope, be guaranteed safety. Implement pile foundation later, pile foundation spacing 4-6m, pile foundation setting is two rows of, arranges spacing 2-4m.
Every mono- section of 9-11m is pressed later, implements pile foundation support table, 11 steel reinforcement cage part of cantilever wall bottom plate 12 and cantilever wall wall; Formwork later, integrated casting concrete, and the anchor cable hole of drain hole, design position has been reserved by design.Cantilever wall wall 11 Wall chest be it is upright, wall back slope rate is 1:0.1-1:0.3, and wall top width is no less than 0.2m.Wall strength grade of concrete is unsuitable Lower than C30, steel bar stress diameter is no less than 12mm.Junction sets expansion joint between each section, and slit width is preferably 20-30mm, seam In should clog pitch hemp cut or other flexible waterproof materials, filling depth should be not less than 150mm.
Upper slope in corresponding pile foundation position, applies the second anchor cable hole of prestress anchorage cable 3, anchor hole aperture 110mm, 10-20 ° of inclination angle, depth inspection are calculated depending on required anchor force.Rock slag in hole is removed to clean, interim use using high pressure air pressure gun Stopple clogs.
The concrete setting phase for meeting no less than 28 days to pile foundation and bottom plate 12, cantilever wall wall 11, reaches intensity and want After asking, start placement in layers wall back backfill, loaded filter etc., until the second anchor cable hole aperture.3 anchored end of anchor cable is applied, etc. Reach set strength by no less than 28 days setting times to the cement mortar in anchored end anchor hole, then fills wall back remainder Divide and bankets.
The anchor cable 3 of free end is passed through to the first anchor cable hole reserved at the top of wall 11, starts to carry out tensioning step by step, it is to be achieved After design pulling capacity, locking is carried out to anchor cable 3, anchor pier is applied, after finally solidifying, wipes out remaining 3 part of anchor cable.
Anchor hole deviations are not preferably greater than 20.0mm when prestress anchorage cable 3 is constructed, and anchor hole degree of skewness should not exceed 2%, bore Hole depth is more than that 3 design length of anchor cable is no less than 0.5m.Prestress anchorage cable 3 is in the milk preceding Ying Qingkong, discharge orifice internal water accumulation, slip casting Guan Yiyu anchor cable 3 is put into hole simultaneously.Into lateral aperture or the hole that has a down dip when slip casting, Grouting Pipe outlet should be inserted into away from bottom hole 100- At 300mm, slurries continuous pouring from bottom to top;In acclivitous drilling when slip casting, sealing device should be set in aperture.Aperture When overflowing slurries or exhaust pipe stopping exhaust and meeting slip casting requirement, slip casting can be stopped.
3 control stress for prestressing of anchor cable no more than 0.65 times of steel strand wires strength standard value, before carrying out formal tensioning, 3 axial tension value of 0.1-0.2 times of anchor cable should be taken, to 3 pre- tensioning of anchor cable 1 time -2 times, keeps the contact at its each position close and the body of rod It is totally straight.1.10-1.20 times of prestress value of ultra stretching is designed with appropriate to the occasion progress anchor cable 3, prestressing force retention, which should meet, to be set Meter requires.
To stratum and the engineering more demanding by anchor structure Bit andits control, the lock value of prestress anchorage cable 3 is preferably anchor cable 3 Axial tension characteristic value;To the engineering allowing stratum and centainly being deformed by anchor structure generation, the lock value of prestress anchorage cable 3 is suitable Prestress value, which is designed, for anchor cable 3 obtains 0.75 times -0.90 times.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, brief for description, during the description of the present embodiment, no longer Technical characteristic same as Example 1 is described, only illustrates the present embodiment difference from Example 1:
A kind of Steep Slope Embankment retaining structure mainly includes the pull-type pile cantilevered anchored cable earth-retaining wall of anchor, including pile foundation, outstanding Arm-type retaining wall 1 and prestress anchorage cable 3 and prestressed anchor 6.The lower section of cantilever retaining wall 1 is spaced laying along its length Foundation pile 2 and prestressed anchor 6.One row's foundation columns 2 are set in the outside of bottom plate 12, one row's anchor pole is set in the inside of bottom plate 12 6。
The specific embodiment of the retaining structure includes: that pile foundation construction platform is first excavated on abrupt slope, can be to platform edges Necessary provisional protection is implemented on slope, guarantees safety.Implement pile foundation, pile foundation spacing 4-6m later.Implement cantilevered earth-retaining later Wall, the second anchor cable hole.
The concrete setting phase for meeting no less than 28 days to pile foundation and bottom plate 12, cantilever wall wall 11, reaches intensity and want After asking, start prestressed anchor 6 of constructing.Bottom plate 12 of the prestressed anchor 6 perpendicular to cantilever retaining wall 1,6 anchor of soil bolt Gu segment length is not preferably less than 4m, 6 anchoring depth of rock-bolt is not preferably less than 3m;Drilling depth is designed more than prestressed anchor 6 Length is no less than 0.5m.
Start placement in layers wall back backfill, loaded filter etc. after the completion of the construction of prestressed anchor 6.Anchor cable 3 is applied later.It fills out Walling back remainder bankets.
Double pile cantilevered anchored cable earth-retaining wall or the pull-type pile cantilevered anchor of anchor in the various embodiments described above retaining structure Pile foundation, cantilever retaining wall 1 and prestress anchorage cable 3 are combined, are remarkably improved supporting and retaining system height, mention by rope retaining wall Highly resistance horizontal loading ability improves whole antidumping and resistant slide ability, solves the higher branch of mountain area steep slope region subgrade engineering Keep off ability need.
The retaining structure can meet the needs of existing mountain area Steep Slope Embankment higher closing slope ability, the single supporting and retaining system knot with tradition Structure is compared, and is breached the limitation that conventional retaining walls are high in Steep Slope Embankment, is kept retaining wall closing slope ability stronger;Prestressed anchor simultaneously Part soil pressure has been resisted in the presence of rope 3, is increased the resistance to capsizing of retaining wall, is largely reduced base stress, Improve the overall stability of cantilever retaining wall 1.
Compared with traditional retaining structure, which significantly reduces the embedded depth of foundation requirement of barricade, especially It is that have better adaptability to Steep Slope Embankment;Barricade uses cantilevered, more saving bricklaying, also more lightweight;Pile foundation support table Merge with cantilever wall bottom plate 12, barricade soil lateral pressure can be balanced by weight stress is banketed well;Prestress anchorage cable 3 is set Seated position makes barricade more effectively resist Wall back pressure, also improves the resistance to capsizing of retaining wall, it is whole to improve retaining wall Body stability significantly improves the closing slope ability of supporting and retaining system ability and retaining wall, is particularly suitable for using in Steep Slope Embankment location.
With the increase of Steep Slope Embankment engineering, which is suitable for Steep Slope Embankment, has broad application prospects.It is double Embedded depth of foundation requirement, the embedding safe distance requirement in outside can be significantly reduced in 3 retaining wall of pile cantilevered anchor cable, for steep Slope embankment has better adapting to property.
Pull-type 3 retaining wall of pile cantilevered anchor cable of anchor is applicable to height of embankment greatly and needs the roadbed work of upright closing slope Journey, the retaining wall make full use of traditional retaining structure, it can be achieved that reducing brush slope, improving supporting and retaining system ability, shorten bridge length, subtract Few land occupation, the purpose for being more conducive to water and soil conservation.
Pile foundation support table merges with cantilever wall bottom plate 12, and abrupt slope can be better balanced and banket and be self-possessed and the soil pressure to wall back; The position that anchor cable 3 is arranged significantly improves the resistance to deformation of cantilever wall, resistance to capsizing, can effectively improve the supporting and retaining system of steep slope region Ability.It can also effectively shorten bridge length, significantly reduce investment cost.Since closing slope ability is strong, it can save and build well If land used, especially reduction agricultural land used, effect are obvious.
The retaining structure closing slope ability is strong, and steep slope region adaptability is good, applied widely, before having good popularization and application Scape and social economic value;Supporting and retaining system 2-5m can be significantly improved, closing slope effect is good, saves land used transverse width 1-4m, shortens bridge Length 1-2 reduces investment cost at least 10% or more across, comprehensively measuring and calculating, society and remarkable in economical benefits.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of Steep Slope Embankment retaining structure characterized by comprising cantilever retaining wall, foundation pile and anchor cable;The cantilever Formula retaining wall includes bottom plate and the wall above bottom plate, and foundation pile, the bottom of the foundation pile is arranged in the lower section of the bottom plate Portion is inserted into slopes, is arranged the first anchor cable hole on the wall, one end of the anchor cable at first anchor cable hole with it is described Wall is connected, and in the second anchor cable hole in the other end of anchor cable insertion slopes and is fixed on the steady soil or basement rock of slopes It is interior.
2. Steep Slope Embankment retaining structure according to claim 1, which is characterized in that the wall is located at the plate outer side Top, the bottom plate inside insertion slopes inside, row's foundation pile is respectively set in the bottom of the bottom plate two sides, it is described Foundation pile is arranged along the length direction interval of the bottom plate.
3. Steep Slope Embankment retaining structure according to claim 1, which is characterized in that the wall is located at the plate outer side Top, the bottom plate inside insertion slopes inside, in the bottom of the plate outer side between the length direction of the bottom plate Every row's foundation pile is arranged, row's anchor pole, institute is arranged along the length direction interval of the bottom plate in the bottom on the inside of the bottom plate The top of anchor pole is stated across the bottom plate is connected with the bottom plate, bottom end is inserted and fixed in slopes.
4. Steep Slope Embankment retaining structure according to any one of claims 1 to 3, which is characterized in that along vertical on the wall Two rows of anchor cables are arranged in direction;First anchor cable hole and the anchor cable are correspondingly arranged and first anchor cable hole is close to the wall Top setting;The inclination angle of the anchor cable relative level is 10-20 °.
5. Steep Slope Embankment retaining structure according to claim 3, which is characterized in that the anchor pole is set perpendicular to the bottom plate It sets;The anchor pole is located at the length inside slopes in soil layer and is more than or equal to 4m;The anchor pole is located in slopes interior rock layer Length is more than or equal to 3m;The difference of the depth of bolthole and Soil Anchor Design length is more than or equal to 0.5m in the slopes.
6. Steep Slope Embankment retaining structure according to claim 1, which is characterized in that the metope of the wall is vertical slope The ratio of slope of rate, the wall wall back is 1: 0.1-1: 0.3;The width of the wall top surface is more than or equal to 0.2m.
7. Steep Slope Embankment retaining structure according to claim 2, which is characterized in that the distance between two rows of foundation piles are as follows: 2-4m;The distance between two neighboring foundation pile in same row's foundation pile are as follows: 4-6m;The stake diameter of the foundation pile is 0.8- 1.5m;The length that the stake top of the foundation pile protrudes into bottom plate is 5-20cm.
8. Steep Slope Embankment retaining structure according to claim 1, which is characterized in that the every 9-11m of cantilever retaining wall For a section, expansion joint is set, the width at the expansion joint is 20-30mm between two adjacent sections cantilever retaining wall;It is described flexible Elastic water-proofing material is filled in seam.
9. Steep Slope Embankment retaining structure according to claim 1, which is characterized in that first anchor cable hole and described second Deviations are less than or equal to 20.0mm when anchor cable hole is constructed, and degree of skewness is less than or equal to 2%;The depth of second anchor cable hole and institute The difference for stating anchorage cable design intubating length is more than or equal to 0.5m;The anchorage cable stretching proof stress is less than or equal to 0.65 times of steel strand wires Strength standard value.
10. a kind of Steep Slope Embankment retaining structure construction method characterized by comprising
Excavation foundation pile driving construction platform implements a row or two rows of foundation piles according to default spacing;
Implement cantilever retaining wall: practice processes pile framing, bottom plate and wall steel reinforcement cage by section;It reserves and sluices on wall Hole, the first anchor cable hole site;Then simultaneously integration pours formwork;
Elastic water-proofing material is clogged in expansion joint between two adjacent sections cantilever retaining wall;
Upper slope in corresponding foundation pile position applies the second anchor cable hole according to pre-set dimension, and removes the second anchor cable hole Interior sundries temporarily closes the second anchor cable hole using stopple;
It is real if implementing row's foundation pile after foundation pile, cushion cap and cantilever retaining wall concrete reach intensity requirement Apply anchor pole;
Placement in layers wall is carried on the back at backfill and loaded filter to the second anchor cable hole;
Anchor end of anchorage cable is applied in the second anchor cable hole, when the cement mortar in the second anchor cable hole reaches default set strength, Wall back remainder is filled to banket;
It applies the anchor pier at the first anchor cable hole: anchor cable being passed through into the first anchor cable hole, is stretched to default pulling capacity, locking anchor step by step Rope applies anchor pier.
CN201811268785.5A 2018-10-29 2018-10-29 A kind of Steep Slope Embankment retaining structure and construction method Pending CN109403371A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109930612A (en) * 2019-03-23 2019-06-25 驿涛项目管理有限公司 A kind of environment-friendly type municipal works slope reinforcement device
CN111501461A (en) * 2020-05-25 2020-08-07 河南省交通规划设计研究院股份有限公司 Rapid temporary and permanent disposal method for half-width cracking disease of excavated and filled roadbed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109930612A (en) * 2019-03-23 2019-06-25 驿涛项目管理有限公司 A kind of environment-friendly type municipal works slope reinforcement device
CN111501461A (en) * 2020-05-25 2020-08-07 河南省交通规划设计研究院股份有限公司 Rapid temporary and permanent disposal method for half-width cracking disease of excavated and filled roadbed

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