CN108625244A - A kind of roadbed composite structure and its construction method - Google Patents

A kind of roadbed composite structure and its construction method Download PDF

Info

Publication number
CN108625244A
CN108625244A CN201810669557.2A CN201810669557A CN108625244A CN 108625244 A CN108625244 A CN 108625244A CN 201810669557 A CN201810669557 A CN 201810669557A CN 108625244 A CN108625244 A CN 108625244A
Authority
CN
China
Prior art keywords
roadbed
rebound
layer
water
composite
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
CN201810669557.2A
Other languages
Chinese (zh)
Inventor
李志华
王述红
李安帮
齐龙
周冕
郑普园
李书敏
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.)
Northeastern University China
CCFEB Civil Engineering Co Ltd
Original Assignee
Northeastern University China
CCFEB Civil Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northeastern University China, CCFEB Civil Engineering Co Ltd filed Critical Northeastern University China
Priority to CN201810669557.2A priority Critical patent/CN108625244A/en
Publication of CN108625244A publication Critical patent/CN108625244A/en
Pending legal-status Critical Current

Links

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
    • 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
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F5/00Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines

Abstract

The present invention discloses a kind of roadbed composite structure and its construction method, which includes mainly draining anti-shifting stake, and filtration hole and drainpipe are provided in the anti-shifting stake of draining;It is equipped with steady layer of water in the anti-shifting stake of draining, it is provided with drain hole in the steady layer of water, rebound is provided in the steady layer of water, the stitching portion of the rebound is provided with longitudinal joint transmission rod, the stitching portion of the rebound is provided with transverse joint, and fiberboard is packed in the transverse joint;It is provided with waterproof layer wall at the slope foot of roadbed, prestressed anchor is provided in waterproof layer wall, prestressed anchor is provided at both ends with steel wire protection network.Roadbed composite structure and its construction method provided by the invention enough reduce the low-lying place's ponding of roadbed, control the differential settlement of roadbed nearby to the greatest extent, ensure stability and globality after new-old concrete bond combines.

Description

A kind of roadbed composite structure and its construction method
Technical field
The present invention relates to roadbed construction technical fields, more particularly to a kind of roadbed composite structure and its construction method.
Background technology
With the continuous propulsion of urbanization process, the highway construction in China has development at full speed, and constantly to hills, mountain The Special sections such as area, reservoir extend, and across different geology and geomorphologies, are limited by technical standards such as linear, longitudinal slopes, unavoidably The a large amount of high embankment roadbed of appearance, to which subgrade stability sex chromosome mosaicism becomes increasingly conspicuous, for example, immersion ground, height, heavy cut, The Special Roadbeds such as roadbed construction technology is the key that ensure that highway engineering high quality is completed with quality control.With swashing for area Increase, roadbed disaster is further serious.For the heavy cut and roadbed that now refer to, heavy cut destroying infection is huge, once occur It causes to cave in the personal safety of very big damage people and property safety due to itself unstability;Meanwhile the pass of neighbouring subgrade engineering Key problem is to control relative settlement, prevents from impacting roadbed near overpass when construction, so as to avoid this intermediate item road Face early-age crack.
With the rapid development of highway construction, highway also gradually receives attention.The experience of railroad was mainly used for reference in the past Highway subgrade is pocessed, summarizes engineering experience with continuous, highway subgrade gradually moves to maturity with guard technology.But it is directed to The research of the high-grade subgrade protection in mountain area is not mature enough, and mountain highway is due to special landform, landforms and the ground residing for it Matter condition, construction and protection to heavy cut bring prodigious difficulty, while the quality control of roadbed is also a major challenge.Mesh Before, the high-grade heavy cut engineering construction key technology in mountain area and the quality control of foundation problem become highway construction critical issue it One.
At present for the not yet systematic definition of roadbed, narrow road fundamental mode, transiens are generally divided into according to settlement of foundation form With roadbed type.Wherein narrow road fundamental mode basal surface subsidence curve is parabola shaped;It is heavy to try to get to the heart of a matter when width of subgrade increases to a certain degree Portion becomes wide flat, and settlement of foundation form is in transiens;Width of subgrade continues to increase, and roadbed basal surface subsidence curve is horse Saddle type.Since roadbed area is big, it is frequently encountered the undesirable weak soil area of some engineering geological conditions of road crossing, these weak soils It is extremely serious to the harm of subgrade stability, simultaneously because the highway construction duration is shorter, can not preferably it consolidate, synthesis is led The settlement after construction of cause will have a direct impact on the sedimentation to road surface with differential settlement, this be the main reason for leading to road surface early damage it One.In addition, roadbed large-area load additional stress caused by ground also will produce shape of a saddle total subsidence, road surface is also resulted in Early damage.Therefore, it is necessary to study the quality control of foundation, more reliable, economic, convenient quality control hand is proposed Section, mitigates the relative settlement of embankment.
Especially in section, situation is more severe, under roadbed is the washing away of flow, etch, the softening the effects that, can cause road Base moistening, slope foot are emptied;Roadbed can be such that the fine granules in roadbed filling are lost under the influence of fluctuation in stage, so that roadbed loses Surely, avalanche.It can be seen that the splicing of water route section new-old concrete bond is more difficult.
In consideration of it, in order to fully realize the combination of section new-old concrete bond, while the low-lying place's ponding of roadbed can also be reduced, most The differential settlement of the neighbouring roadbed of the control of big degree, ensures stability and globality after new-old concrete bond combines, at present there is an urgent need for It is a kind of to ensure the complete combination of new-old concrete bond in section, and fully draining can be reached, than traditional new-old concrete bond combination shape The more efficient and practical novel synthesis that makes the firm combination of new-old concrete bond in section vicinity and can well be drained of formula Measure.
Invention content
The object of the present invention is to provide a kind of roadbed composite structure and its construction methods, exist to solve the above-mentioned prior art The problem of, the low-lying place's ponding of roadbed is enough reduced, controls the differential settlement of roadbed nearby to the greatest extent, ensures new-old concrete bond knot Stability after conjunction and globality.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of roadbed composite structure, including the anti-shifting stake of draining, and drainage is provided in the anti-shifting stake of draining Hole and drainpipe;It is equipped with steady layer of water in the anti-shifting stake of the draining, is provided with drain hole in the steady layer of water, in the steady layer of water It is provided with rebound, the stitching portion of the rebound is provided with longitudinal joint transmission rod, and the stitching portion of the rebound is provided with transverse joint, It is packed with fiberboard in the transverse joint;It is provided with waterproof layer wall at the slope foot of roadbed, prestressed anchor is provided in waterproof layer wall, Prestressed anchor is provided at both ends with steel wire protection network.
Optionally, the drain hole is made of waterproof screwed pipe, and the aperture of the drain hole is provided with steel wire.
Optionally, the rebound is armored concrete rebound, includes the bar-mat reinforcement of crisscross setting;The longitudinal joint Transmission rod both ends are sheathed on respectively in the bar-mat reinforcement.
Optionally, multiple filtration holes are evenly provided in the anti-shifting stake of draining, anti-filter is provided in the filtration hole Layer, the filtration hole both ends are coated with gauze.
Optionally, the longitudinal joint transmission rod is the spiral of diameter 36mm, and the longitudinal joint transmission rod is outside after brushing pitch It is coated with polyethylene film.
Optionally, the connector sleeve of long 100mm is provided in the bar-mat reinforcement, the longitudinal joint transmission rod passes through the connector sleeve It is sheathed on the rebound, there are the gaps for filling loose thread in the connector sleeve.
Optionally, structure, the anchored end of the prestressed anchor and the waterproof layer wall are led to during the prestressed anchor is It is painted with water-repellent paint and is arranged with waterproof apron.
Optionally, there are 30 to the 40mm thickness gaps for emulsified asphalt joint sealing material to be added on the fiberboard.
The present invention also provides a kind of roadbed composite structure construction methods, include the following steps:
Step 1: carrying out drainage of blocking to roadbed both sides flow;
Step 2: measuring setting-out to former roadbed, is laid within the scope of new road and drain anti-shifting stake, stake spacing 1.4m is beaten Stake when by standard carry out every meter of blow counts, total blow counts, embedded depth, final set, plektron, fall away from etc. original records, weldering Mouth carries out the hidden record of welding, and when pile follower carries out the original records such as blow counts, hammer jump degree, pile penetration;
Step 3: step excavation, takes digging mode from bottom to top, excellent graded broken stone leveling layer is arranged on step, Graded broken stone makees aggregate, using the gap of cementitious material and mortar filler aggregate, is paved compacting using embedded squeezing principle;
Step 4: being laid with direction earthwork grille by bottom step, and soil nail wall is set;
Step 5: the steady layer of water of 20cm thickness is laid with, every 5 meters of distance one drain holes of setting;
Step 6: the pouring reinforcement concrete rebound in steady layer of water;
Step 7: longitudinal joint designs;
Step 8: excavating seepage ditch, and waterproof layer wall is set at roadbed side slope slope foot, waterproof layer wall passes through prestressed anchor Bar enhances stability.
Optionally, in the step 6, the size of armored concrete rebound by using it needs to be determined that;Armored concrete mistake The quantity of reinforcement of bar-mat reinforcement determines as the following formula in cab apron:
In formula:LSIt is transverse joint spacing (m) when-longitudinal reinforcement;When transverse steel, for no longitudinal joint transmission rod longitudinal joint or from By the spacing (m) between side;H-road surface layer thickness (mm);The coefficient of friction resistances of the μ-between supercrust and base;fsy- reinforcing bar Yield strength (MPa).
The present invention achieves following technique effect compared with the existing technology:
The present invention, using anti-shifting stake progress stiffening basic ground is drained, filtration hole and draining is set in pile body at new-old concrete bond Pipe, centre are filled with small crushed stone, prevent new roadbed and old roadbed since compaction is different and hypsography low-lying polywater causes not Uniform settlement is to deviate;Drain hole is arranged after being laid with steady layer of water in roadbed lowest level, and drain hole uses waterproof screwed pipe, aperture setting Steel wire prevents sandstone from causing screw thread blockage.It is mixed using cast in place reinforced bar along the longitudinal section direction of new roadbed in steady layer of water Solidifying soil rebound carries out new-old concrete bond longitudinal fixation, and armored concrete rebound configures vertically and horizontally bar-mat reinforcement;It is mixed in reinforcing bar Longitudinal joint transmission rod is arranged in solidifying soil rebound stitching portion, prevents new-old concrete bond because transverse direction vehicle flowrate generation of different sizes in road surface is uneven Even sedimentation, longitudinal joint transmission rod are nested with holder bar-mat reinforcement, make to connect between armored concrete rebound it is more firm, to being exposed to Outer longitudinal joint transmission rod carries out antirust treatment;Transverse joint is arranged in armored concrete rebound stitching portion, and joint filling fiber is used at gap Waterproof layer wall is arranged at roadbed slope foot, is squeezed into waterproof layer wall and leads to anchor pole in prestressing force, can make the combination of new-old concrete bond for plate It is firm, and good drainage effect can be reached.Lead to anchor pole both ends in prestressing force and steel wire protection network be set, lead in prestressing force anchor pole with The anchored end brushing water-repellent paint of waterproof layer wall simultaneously packages waterproof apron, and natural precipitation is avoided to corrode.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings Obtain other attached drawings.
Fig. 1 is roadbed road conditions structural schematic diagram of the present invention;
Fig. 2 is rebound of the present invention and pile foundation position view;
Fig. 3 is that the present invention drains anti-shifting stake cross-sectional view;
Fig. 4 is that the road surface of the present invention is connected floor map;
Fig. 5 is the elevational schematic view of rebound of the present invention linking;
Fig. 6 is joining place longitudinal joint structural map of the present invention;
Fig. 7 is joining place transverse joint structural map of the present invention;
Wherein, 1 it is overpass, 2 be track for a train, 3 be the anti-shifting stake of draining, 4 be filtration hole, 5 be drainpipe, 6 is that water is steady Layer, 7 be bitumen layer, 8 be drain hole, 9 be longitudinal joint transmission rod, 10 be rebound, 11 be waterproof layer wall, 12 be prestressed anchor, 13 it is fiberboard, 14 be connector sleeve, 15 be polyethylene film, 16 be bar-mat reinforcement, 17 is emulsified asphalt joint sealing material.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of roadbed composite structure and its construction methods, exist to solve the above-mentioned prior art The problem of, the low-lying place's ponding of roadbed is enough reduced, controls the differential settlement of roadbed nearby to the greatest extent, ensures new-old concrete bond knot Stability after conjunction and globality.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real Applying mode, the present invention is described in further detail.
A kind of roadbed composite structure of present invention offer and its construction method, as shown in figs. 1-7, structure of the invention uses row The anti-shifting stake 3 of water and the combined mode of rebound 10, rebound 10 are armored concrete rebound.It is set on the overpass 1 at both ends It is equipped with track for a train 2, the roadbed of 1 centre of overpass carries out stiffening basic ground using anti-shifting stake 3 is drained, and drains anti-shifting stake 3 Filtration hole 4 and drainpipe 5 are set in pile body, centre is filled with small crushed stone, prevents new roadbed and old roadbed since compaction is different, And differential settlement caused by ponding and displacement at hypsography low-lying;After roadbed lowest level is laid with steady layer of water 6, drain hole is set 8, drain hole 8 uses waterproof screwed pipe, aperture that steel wire is arranged, prevents the sundries such as sandstone from causing screw thread blockage.In steady layer of water 6 On along the longitudinal section direction of new roadbed longitudinal fixation, reinforcing bar carry out new-old concrete bond using cast-in-situ steel reinforced concrete rebound Asphalt layer 7, i.e. supercrust above concrete rebound.Vertically and horizontally reinforcing bar is configured in armored concrete rebound, forms steel Muscle net 16 makes armored concrete rebound ensure the intensity of structure by the embedding effect of the plane of disruption;In armored concrete Longitudinal joint transmission rod 9 is arranged in rebound stitching portion, prevents new-old concrete bond because road vehicles load is different and differential settlement occurs, The longitudinal joint transmission rod 9 being arranged herein is the spiral of diameter 36mm, and brushing pitch and deposited polyethylene film 15, are passing longitudinal joint thereon The connector sleeve 14 of long 100mm is set around power bar, and there are the gaps of 30mm to fill out loose thread, longitudinal joint transmission rod 9 and steel for connector sleeve 14 Muscle net 16 is socket-connected by connector sleeve 14, makes to connect between armored concrete rebound more firm.To being exposed to outer longitudinal joint Transmission rod 9 carries out antirust treatment, prevents steel bar corrosion;In order to prevent between plate and plate due to expand with heat and contract with cold with additional stress etc. because The destruction of the forms such as extruding caused by plain, dislocation is arranged transverse joint in armored concrete rebound stitching portion, joint filling is used at gap Fiberboard 13 is clogged, and 30 is reserved on fiberboard 13, emulsified asphalt joint sealing material 17 is added to 40mm thickness gap, prevent reinforcing bar from aoxidizing. Waterproof layer wall 11 is set at roadbed slope foot, the prestressed anchor 12 of structure is led in being squeezed into waterproof layer wall 11, can be enhanced anti- The stability of water layer wall 11, and good drainage effect can be reached.Steel wire protection network, prestressing force is arranged in 12 both ends of prestressed anchor The anchored end brushing water-repellent paint of anchor pole 12 and waterproof layer wall 11 simultaneously packages waterproof apron.Drain it is anti-move stake 3 pile body it is reasonable between Away from the reserved an appropriate number of filtration hole 4 being uniformly arranged in place, loaded filter, nose end geotextiles or gauze packet are set in filtration hole 4 It covers, prevents from blocking.
The longitudinal joint transmission rod 9 of setting effectively prevent the longitudinally opposed displacement of new-old concrete bond and new roadbed armored concrete mistake The differential settlement of cab apron, it is one that new-old concrete bond is firmly tightly fastened by the holder bar-mat reinforcement 16 around longitudinal joint transmission rod 9 It is whole, pitching is used in combination and applies polyethylene film 15, controls length travel significantly.
Waterproof layer wall 11 can prevent erosion of the level of ground water roadside Natural Water to roadbed entirety.Waterproof layer wall 11 is squeezed into pre- Stress anchor pole 12 can enhance the stability of waterproof layer wall 11 and reach good drainage effect.It drains in anti-shifting stake 3 Drainpipe 5 uses pvc honeycomb ducts;Drain hole 8 uses waterproof threaded sleeve, and joint is wound with iron wire;Longitudinal joint transmission rod 9 uses Diameter 36mm plain bars;Armored concrete rebound should tinker with closely knit, be flushed with adjacent plate, there is not allowed that faulting of slab ends;Reinforcing bar Vertically and horizontally reinforcing bar, formation bar-mat reinforcement 16, outside reinforcing steel bar center are 10cm, reinforcing bar according to seam distance to concrete rebound built in Protective layer thickness is 5cm;The groove of armored concrete rebound pays attention to applying and spreads adhesion coating pitch before black top concrete.
Fiberboard 13 at joint filling applies knot structure using pitch;Prestressed anchor 12 uses high-strength bolt anchor pole, waterproof layer Wall 11 applies waterproof material outside, is corroded to prevent natural precipitation.
The roadbed composite structure construction method of the present invention includes the following steps:
Step 1: carrying out drainage of blocking to two side flow of roadbed first.
Step 2: measuring setting-out to former roadbed, is laid within the scope of new road and drain anti-shifting stake 3, stake spacing 1.4m, newly Roadbed stud spacing uses interior close outer thin principle, 1.4~2.5m of stake spacing.When piling strictly every meter of hammer is carried out by related standard Hit number, total blow counts, embedded depth, final set, plektron, fall away from etc. original records, weld bond also to carry out the hidden note of welding Record, when pile follower, want the original records such as ready-made blow counts, hammer jump degree, pile penetration.
Step 3: carrying out bench excavation, digging mode from bottom to top is taken, avoids damaging old road base.Step The upper excellent graded broken stone leveling layers of arrangement 45cm, graded broken stone makees aggregate, using a certain number of cementitious materials and enough ashes The gap embedded squeezing principle of volume of slurry filler aggregate paves compacting.
Step 4: direction earthwork grille is laid with by bottom step, in order to enhance TGXG and original road foundation The stability of connection needs that soil nail wall is arranged.
Step 5: be laid with 20cm it is thick by cement, rubble, the steady layer of water 6 of mountain flour composition, then every 5 meters of distance settings Drain hole 8, drain hole 8 use waterproof screwed pipe, interface that steel wire protection network is arranged, prevents from being blocked by sandstone.
Step 6: reaching after code requirement obtains intensity in steady layer of water 6, pouring reinforcement concrete rebound, armored concrete The size of plate can be by using needs and locality empirically determined;Quantity of reinforcement is determined with reference to following formula:
In formula:LSIt is transverse joint spacing (m) when-longitudinal reinforcement;When transverse steel, for no pull rod longitudinal joint or free margins it Between spacing (m);H-surface thickness (mm);The coefficient of friction resistances of the μ-between face layer and base;fsyThe yield strength of-reinforcing bar (MPa)。
Step 7: longitudinal joint designs:It presses《Highway cement concrete pavement design specification (JTGD40-2011)》It executes.
Step 8: excavating seepage ditch, waterproof layer wall 11 is set at roadbed side slope slope foot, and waterproof layer wall 11 passes through prestressing force In lead to anchor pole enhance stability.
Specific case is applied in the present invention, and principle and implementation of the present invention are described, above example Illustrate the method and its core concept for being merely used to help understand the present invention;Meanwhile for those of ordinary skill in the art, according to According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification It should not be construed as limiting the invention.

Claims (10)

1. a kind of roadbed composite structure, it is characterised in that:Including draining anti-shifting stake, filtration hole is provided in the anti-shifting stake of draining With drainpipe;It is equipped with steady layer of water in the anti-shifting stake of draining, drain hole is provided in the steady layer of water, is set in the steady layer of water It is equipped with rebound, the stitching portion of the rebound is provided with longitudinal joint transmission rod, and the stitching portion of the rebound is provided with transverse joint, institute It states and is packed with fiberboard in transverse joint;It is provided with waterproof layer wall at the slope foot of roadbed, prestressed anchor is provided in waterproof layer wall, in advance Stress anchor pole is provided at both ends with steel wire protection network.
2. roadbed composite structure according to claim 1, it is characterised in that:The drain hole uses waterproof screw thread control At the aperture of the drain hole is provided with steel wire.
3. roadbed composite structure according to claim 1, it is characterised in that:The rebound is armored concrete transition Plate includes the bar-mat reinforcement of crisscross setting;Longitudinal joint transmission rod both ends are sheathed on respectively in the bar-mat reinforcement.
4. roadbed composite structure according to claim 1, it is characterised in that:It is evenly provided in the anti-shifting stake of draining Multiple filtration holes are provided with loaded filter in the filtration hole, and the filtration hole both ends are coated with gauze.
5. roadbed composite structure according to claim 3, it is characterised in that:The longitudinal joint transmission rod is the spiral shell of diameter 36mm Line reinforcing bar is coated with polyethylene film after the outer brushing pitch of the longitudinal joint transmission rod.
6. roadbed composite structure according to claim 5, it is characterised in that:It is provided with long 100mm's in the bar-mat reinforcement Connector sleeve, the longitudinal joint transmission rod are sheathed on by the connector sleeve on the rebound, and there are for filling out in the connector sleeve Fill the gap of loose thread.
7. roadbed composite structure according to claim 6, it is characterised in that:The prestressed anchor leads to structure, institute in being The anchored end for stating prestressed anchor and the waterproof layer wall is painted with water-repellent paint and is arranged with waterproof apron.
8. roadbed composite structure according to claim 7, it is characterised in that:There are emulsified for being added on the fiberboard 30 to 40mm thickness gaps of asphalt joint filler.
9. a kind of roadbed composite structure construction method, it is characterised in that:Include the following steps:
Step 1: carrying out drainage of blocking to roadbed both sides flow;
Step 2: measure setting-out to former roadbed, is laid within the scope of new road and drain anti-shifting stake, stake spacing 1.4m, when piling By standard carry out every meter of blow counts, total blow counts, embedded depth, final set, plektron, fall away from etc. original records, weld bond do Weld hidden record well, when pile follower carries out the original records such as blow counts, hammer jump degree, pile penetration;
Step 3: step excavation, takes digging mode from bottom to top, excellent graded broken stone leveling layer, grading are arranged on step Rubble makees aggregate, using the gap of cementitious material and mortar filler aggregate, is paved compacting using embedded squeezing principle;
Step 4: being laid with direction earthwork grille by bottom step, and soil nail wall is set;
Step 5: the steady layer of water of 20cm thickness is laid with, every 5 meters of distance one drain holes of setting;
Step 6: the pouring reinforcement concrete rebound in steady layer of water;
Step 7: longitudinal joint designs;
Step 8: excavating seepage ditch, and waterproof layer wall is set at roadbed side slope slope foot, waterproof layer wall is increased by prestressed anchor Stiff stability.
10. roadbed composite structure construction method according to claim 9, it is characterised in that:In the step 6, reinforcing bar is mixed The size of solidifying soil rebound by using it needs to be determined that;The quantity of reinforcement of bar-mat reinforcement determines as the following formula in armored concrete rebound:
In formula:LSIt is transverse joint spacing (m) when-longitudinal reinforcement;When transverse steel, for the longitudinal joint or free margins of no longitudinal joint transmission rod Between spacing (m);H-road surface layer thickness (mm);The coefficient of friction resistances of the μ-between supercrust and base;fsyThe surrender of-reinforcing bar Intensity (MPa).
CN201810669557.2A 2018-06-26 2018-06-26 A kind of roadbed composite structure and its construction method Pending CN108625244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810669557.2A CN108625244A (en) 2018-06-26 2018-06-26 A kind of roadbed composite structure and its construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810669557.2A CN108625244A (en) 2018-06-26 2018-06-26 A kind of roadbed composite structure and its construction method

Publications (1)

Publication Number Publication Date
CN108625244A true CN108625244A (en) 2018-10-09

Family

ID=63688354

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810669557.2A Pending CN108625244A (en) 2018-06-26 2018-06-26 A kind of roadbed composite structure and its construction method

Country Status (1)

Country Link
CN (1) CN108625244A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109653049A (en) * 2018-12-18 2019-04-19 中铁十五局集团第工程有限公司 The construction method in approach fill section in a kind of soft ground treatment
CN111719367A (en) * 2020-06-12 2020-09-29 中国二十冶集团有限公司 Road subgrade strengthening method for continuously limiting and restraining soil body slippage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109653049A (en) * 2018-12-18 2019-04-19 中铁十五局集团第工程有限公司 The construction method in approach fill section in a kind of soft ground treatment
CN111719367A (en) * 2020-06-12 2020-09-29 中国二十冶集团有限公司 Road subgrade strengthening method for continuously limiting and restraining soil body slippage

Similar Documents

Publication Publication Date Title
CN102296507B (en) Treatment method of subgrade cracks
CN108625244A (en) A kind of roadbed composite structure and its construction method
CN106320120B (en) A kind of peg board formula is without dirt road base construction of the highway technique
CN203334154U (en) Embankment structure for preventing bearing platform of pile foundation from stretching in roadbed under viaduct
CN103334357B (en) Viaduct road embankment structure with lower pile foundation bearing platform extending in roadbed, and construction method
CN103452130B (en) The deformed bar net board-like barricade of reinforcement earth pillar
CN209194544U (en) Combined type foundation pit supporting construction
CN108560349A (en) The high embankment retaining structure in soft clay area
CN204940030U (en) Reconstruction and extension project new-old concrete bond Pavement mosaic structure
CN105803922B (en) A kind of high embankment filled soil end of the bridge anti-settling structure
CN201395794Y (en) Foundation ditch with concealed columns and soil-nailing support
CN104480956B (en) A kind of minor diameter mold-bagged concrete pile composite foundation
CN107503257B (en) One kind being close to mountain high-filled subgrade stabilization and Deformation control structure and construction method
CN108729437A (en) Composite, water-drain isolating pad, bedding waterproof/drainage structure and side slope are layered waterproof/drainage structure
CN111549598B (en) Construction method of highway reinforced bridgehead roadbed in collapsible loess region
CN206127789U (en) Structure of making an uproar falls in highway tunnel driving damping
CN208415020U (en) A kind of roadbed composite structure
CN110195419A (en) A kind of concrete guardrail structure and its construction method
CN109371910A (en) Pad ground raising protection and construction method
CN108589747A (en) EPS light road banks are widened in conjunction with plant biological bag protective slope structure and construction method
CN204662417U (en) A kind of Deep Thick Soft Ground district pool roadbed foundation reinforcing structure
CN107700301A (en) A kind of ruggedized construction on express highway roadbed
RU2422581C1 (en) Method to repair and construct arterial highways
CN203594048U (en) Prestressing force reinforcing mesh ribbing earth pillar plate type retaining wall
CN208293589U (en) A kind of EPS light road bank is widened in conjunction with plant biological bag protective slope structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination