CN107034789B - Abutment Back combination backfill construction method - Google Patents
Abutment Back combination backfill construction method Download PDFInfo
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- CN107034789B CN107034789B CN201710358010.6A CN201710358010A CN107034789B CN 107034789 B CN107034789 B CN 107034789B CN 201710358010 A CN201710358010 A CN 201710358010A CN 107034789 B CN107034789 B CN 107034789B
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- backfill
- soil
- abutment
- construction method
- retaining wall
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of Abutment Backs to combine backfill construction method, comprising the following steps: the region for surrounding platform back with retaining wall is using good earthen backfill；Excavate and clear up the backfill that platform back is formed by U-shaped region with retaining wall to form the step-like white space of inverted triangle；It is backfilled in the step-like white space of inverted triangle using lightweight foam soil.Abutment Back combination backfill construction method proposed by the present invention, improves back filling behind abutment region construction quality, enhances backfill Regional carrying capacity, reduce the occurrence of jumping vehicle probability.
Description
Technical field
The present invention relates to technical field of bridge construction more particularly to a kind of Abutment Back combination backfill construction methods.
Background technique
In a certain range due to bridge platform back, especially on the inside of platform parados, compacting operation face is narrow and can not use strong
Equipment is pressed, makes it harder to reach regulation compaction requirement, Subgrade Compaction Quality is compared with open section of roadbed filling quality at platform back
Compared with congenital there are disadvantage, load repeated action easily causes the Compression Settlement of roadbed at platform back after being open to traffic.Roadbed and platform are carried on the back simultaneously
Joining place is tempered toughness with gentleness, and abutment is rigidity, and roadbed is flexibility, and two kinds of structures are also different to the bearing capacity and settling amount of substrate, will
Aggravate differential settlement situation.
Back filling behind abutment always is the common fault of science of bridge building, and differential settlement will cause to jump vehicle phenomenon, influences relaxing for driving
Adaptive, the damage of accelerating structure object and road surface.
Summary of the invention
The main purpose of the present invention is to provide a kind of Abutment Backs to combine backfill construction method, it is intended to improve back filling behind abutment
Region construction quality, enhancing backfill Regional carrying capacity, reduces the occurrence of jumping vehicle probability.
To achieve the above object, the present invention provides a kind of Abutment Back combination backfill construction method, comprising the following steps:
The region that platform back is surrounded with retaining wall is using good earthen backfill；
Excavate and clear up the backfill that platform back is formed by U-shaped region with retaining wall to form the step-like blank area of inverted triangle
Domain；
It is backfilled in the step-like white space of inverted triangle using lightweight foam soil.
Preferably, the region that platform back is surrounded with retaining wall is specifically included using the step of good earthen backfill:
Cleaning substrate simultaneously carries out surveying and locating；
When using backfill earthen backfill, place Min layers soil and compaction in layers are carried out.
Preferably, when the earthen backfill using backfill, carry out place Min layers soil and the step of compaction in layers in, using often filling out one
Layer is compacted one layer, detects one layer, checks that frequency is every layer of every side multiple check points of setting, compactness is filled again through detection qualification
Next layer.
Preferably, when carrying out compaction in layers to backfill, after carrying out pressure stabilizing and low vibration repeatedly using vibrated roller, pass through
Road roller carries out static pressure until using compacting equipment compacting to prevent without obvious wheelmark, and for abutment and two sides retaining wall periphery
Damage to periphery wall.
Preferably, the backfill that platform back is formed by U-shaped region with retaining wall excavates and clears up to form inverted triangle
The step of step-like white space, specifically includes:
Using excavator to platform back be formed by U-shaped region with retaining wall backfill excavate, until dig arrive retaining wall and
Platform carries on the back footing bottom, and excavation region bottom width is 80-100cm, and white space side is retaining wall or abutment, and the other side presses 1:
1 slope is to form inverted trapezoidal excavation face；
Slope inclined-plane is trimmed to step-like, the wide 30-50cm of every grade of step, high 30-50cm, to form an inverted triangle platform
Scalariform region.
Preferably, it in described the step of being backfilled in the step-like white space of inverted triangle using lightweight foam soil, adopts
Lightweight foam soil is filled with hierarchical block mode, lift height is consistent with backfill step height.
Preferably, in described the step of being backfilled in the step-like white space of inverted triangle using lightweight foam soil, from
Bottom is started, and in lightweight foam soil back filled region, layer of steel wire net is arranged every the first preset height, sets every the second preset height
One of deformation joint is set, the deformation joint is using pitch deals and runs through entire Foam lightweight soil back filled region.
Preferably, conveyed when pouring lightweight foam soil using pump line, and the discharge port of pump line and surface of filling keep it is horizontal with
It reduces and uncured lightweight foam soil is disturbed.
Preferably, when lightweight foam soil is backfilled, the slamp value, cement slurry and light soil of lightweight foam soil are mixed and stirred
Object bulk density is detected and is measured to be adjusted in real time to filling for lightweight foam soil.
Preferably, when lightweight foam soil is backfilled, after the top layer for having poured lightweight foam soil, to pouring building body top-level list
Face plastic covering film or geotextiles are conserved.
Platform back is formed by U-shaped region with retaining wall by Abutment Back combination backfill construction method proposed by the present invention
Backfill is excavated and is filled with lightweight foam soil, solves the problems, such as that traditional construction compactness does not reach requirement, and reduces uneven
Sedimentation, efficiently solves problem of bumping at bridge-head, improves driving comfort level.In addition, this Abutment Back combination backfill construction method
Relative to the method all filled using lightweight foam soil, cost can be substantially reduced.
Detailed description of the invention
Fig. 1 is the plan view of U-shaped region grooving in Abutment Back of the present invention combination backfill construction method；
Fig. 2 is the sectional view of U-shaped region grooving in Abutment Back of the present invention combination backfill construction method；
Fig. 3 is the flow diagram of Abutment Back of the present invention combination backfill construction method；
Fig. 4 is the refinement flow diagram of step S10 in Abutment Back of the present invention combination backfill construction method；
Fig. 5 is the refinement flow diagram of step S20 in Abutment Back of the present invention combination backfill construction method.
In figure, 1- bridge platform back, 2- retaining wall, the step-like U-lag of 3-, 4- backfill, 5- lightweight foam soil.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to figs. 1 to Fig. 3, in this preferred embodiment, a kind of Abutment Back combination backfill construction method, including following step
It is rapid:
Step S10, the region that platform back is surrounded with retaining wall is using good earthen backfill；
Step S20 excavates and clears up the backfill that platform back is formed by U-shaped region with retaining wall to form inverted triangle step
Shape white space；
Step S30 is backfilled in the step-like white space of inverted triangle using lightweight foam soil.
Specifically, it is specifically included referring to Fig. 4, step S10:
Step S101 clears up substrate and carries out surveying and locating；
When clearing up substrate, depth is cleared up with the control of earth-retaining footing of wall bottom, need to be changed and be filled out if any situation overly moist.Use whole station
Instrument releases middle line and side slope line, and measures substrate away from roadbed top surface height difference, marks every 10m.
Step S102 carries out place Min layers soil and compaction in layers when using backfill earthen backfill.
It is specific to be compacted one layer using often filling out one layer, one layer is detected, checks that frequency is every layer of every side multiple check points of setting
(every side is no less than three points, in the present embodiment, checks that three points are examined in the every every layer of left, center, right in side of frequency, every side refers to U-shaped
Three sides), compactness fills next layer through detection qualification again.To ensure that the intensity of each layer of backfill.Backfill selection
Internal friction angle is big, granule strength higher 4% is choked dirt.When large area paving is banketed, it is 20m that paving, which fills out section length, every time, and width is
6m, paving soil layering carry out, and every layer of paving soil thickness is 30cm, and after every layer of paving is native, empty wagons strikes off ground surface when returning, in favor of row
Preliminary consolidation when sailing.
When carrying out compaction in layers to backfill, after carrying out pressure stabilizing and low vibration repeatedly using vibrated roller, pass through road roller
Static pressure is carried out until using compacting equipment compacting to prevent to periphery without obvious wheelmark, and for abutment and two sides retaining wall periphery
The damage of wall.In the present embodiment, pressure stabilizing is first carried out using vibrated roller, then low vibration 2 times, finally use the road roller of 18t
Static pressure is carried out, 1/3 wheel that is staggered when rolling every time is wide, until without obvious wheelmark.Detect compactness, it is ensured that nucleus compactness is not
Lower than 96%.For abutment and two sides retaining wall periphery using small rammer tool compacting, and prevent the damage to periphery wall.
Deflection testing should be carried out after good earthen backfill.
Specifically, it is specifically included referring to Fig. 5, step S20:
Step S201 is excavated using the backfill that excavator is formed by U-shaped region with retaining wall to platform back, is arrived until digging
Retaining wall and platform carry on the back footing bottom, and excavations region bottom width is 80-100cm, and white space side is retaining wall or abutment, separately
Side is formed inverted trapezoidal excavation face by 1:1 slope；
Mechanical excavation should reduce the disturbance to Core Soil, and excavation must not damage wall.
Slope inclined-plane is trimmed to step-like (can take manual cleaning), the wide 30-50cm of every grade of step, height by step S202
30-50cm, to form an inverted triangle stepped regions.
In step S30, lightweight foam soil, lift height and backfill step height one are filled using hierarchical block mode
It causes.It is wall, other side position Core Soil, it is therefore not necessary to which template is arranged that lightweight foam soil, which backfills region side,.Using hierarchical block
Mode fills lightweight foam soil, strengthens conscientiously refill quality, reduces backfill region differential settlement, reduces later period disease
Occur.
It in step S30, starts from bottom, in lightweight foam soil back filled region, (is set in the present embodiment every the first preset height
Set at interval of 2 meters) setting layer of steel wire net, every the second preset height (being arranged in the present embodiment at interval of 20 meters), setting is together
Deformation joint.Deformation joint is using pitch deals and runs through entire Foam lightweight soil back filled region.
Further, it is conveyed when pouring lightweight foam soil using pump line, and the discharge port of pump line and surface of filling keep horizontal
Uncured lightweight foam soil is disturbed with reducing.It is conveyed when lightweight foam soil pours using pump line, it may be achieved long distance delivery
It pours.The discharge port of pump line and surface of filling are kept horizontal, reduces and uncured lightweight foam soil is disturbed, make bubble defoaming amount
It is minimized, it is ensured that filled soils.
Further, when lightweight foam soil is backfilled, the slamp value, cement slurry and light soil of lightweight foam soil are mixed
It is detected and is measured with object bulk density to be adjusted in real time to filling for lightweight foam soil.
In step S30, when lightweight foam soil is backfilled, after the top layer for having poured lightweight foam soil, to pouring building body top
Layer surface plastic covering film or geotextiles are conserved (curing time is no less than 7d, forbids upper people and machinery during maintenance).
Platform back is formed by U-shaped region with retaining wall by Abutment Back combination backfill construction method proposed by the present invention
Backfill is excavated and is filled with lightweight foam soil, solves the problems, such as that traditional construction compactness does not reach requirement, and reduces uneven
Sedimentation, efficiently solves problem of bumping at bridge-head, improves driving comfort level.In addition, this Abutment Back combination backfill construction method
Relative to the method all filled using lightweight foam soil, cost can also be substantially reduced.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure transformation made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (8)
1. a kind of Abutment Back combination backfill construction method, which comprises the following steps:
The region that platform back is surrounded with retaining wall is using good earthen backfill；
Excavate and clear up the backfill that platform back is formed by U-shaped region with retaining wall to form the step-like white space of inverted triangle；
It is backfilled in the step-like white space of inverted triangle using lightweight foam soil；
The region that platform back is surrounded with retaining wall is specifically included using the step of good earthen backfill:
Cleaning substrate simultaneously carries out surveying and locating；
When using backfill earthen backfill, place Min layers soil and compaction in layers are carried out；
When the earthen backfill using backfill, carry out place Min layers soil and the step of compaction in layers in, using often filling out one layer, compacting one
Layer detects one layer, checks that frequency is every layer of every side multiple check points of setting, compactness fills next layer through detection qualification again.
2. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that carry out layering pressure to backfill
In real time, after carrying out pressure stabilizing and low vibration repeatedly using vibrated roller, by road roller progress static pressure until without obvious wheelmark, and it is right
Use compacting equipment compacting to prevent the damage to periphery wall in abutment and two sides retaining wall periphery.
3. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that described by platform back and retaining wall
The backfill for being formed by U-shaped region, which excavates and clears up the step of forming inverted triangle step-like white space, to be specifically included:
Excavated using the backfill that excavator is formed by U-shaped region with retaining wall to platform back, is carried on the back until digging to retaining wall and platform
Footing bottom, excavation region bottom width are 80-100cm, and white space side is retaining wall or abutment, and the other side is put by 1:1
Slope is to form inverted trapezoidal excavation face；
Slope inclined-plane is trimmed to step-like, the wide 30-50cm of every grade of step, high 30-50cm, so that it is step-like to form an inverted triangle
Region.
4. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that described step-like in inverted triangle
In the step of being backfilled in white space using lightweight foam soil, lightweight foam soil is filled using hierarchical block mode, is layered
Thickness is consistent with backfill step height.
5. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that described step-like in inverted triangle
In the step of being backfilled in white space using lightweight foam soil, started from bottom, in lightweight foam soil back filled region, Mei Ge
Layer of steel wire net is arranged in one preset height, one of deformation joint is arranged every the second preset height, the deformation joint uses pitch China fir
Plate and run through entire Foam lightweight soil back filled region.
6. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that adopted when pouring lightweight foam soil
It is conveyed with pump line, and the discharge port of pump line and surface of filling holding level disturb uncured lightweight foam soil with reducing.
7. Abutment Back combination backfill construction method as described in claim 1, which is characterized in that returned in lightweight foam soil
When filling out, the slamp value of lightweight foam soil, cement slurry and light soil mix bulk density are detected and measured to light foam
Filling for soil is adjusted in real time.
8. Abutment Back combination backfill construction method as claimed in any of claims 1 to 7 in one of claims, which is characterized in that light
When matter foam soil is backfilled, after the top layer for having poured lightweight foam soil, to pouring building body topsheet surface plastic covering film or soil
Work cloth is conserved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710358010.6A CN107034789B (en) | 2017-05-19 | 2017-05-19 | Abutment Back combination backfill construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710358010.6A CN107034789B (en) | 2017-05-19 | 2017-05-19 | Abutment Back combination backfill construction method |
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| CN107034789A CN107034789A (en) | 2017-08-11 |
| CN107034789B true CN107034789B (en) | 2019-08-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863194A (en) * | 2018-08-14 | 2018-11-23 | 中国十七冶集团有限公司 | A kind of backfilling materials behind abutments liquid cinder and its construction method |
| CN109930476A (en) * | 2019-03-01 | 2019-06-25 | 刘鹏 | A kind of method that abutment subgrade construction is filled using bubble lightweight material in subway top |
| CN110158481A (en) * | 2019-06-20 | 2019-08-23 | 中国五冶集团有限公司 | A kind of method and structure of back filling behind abutment construction |
| CN114439018A (en) * | 2022-02-23 | 2022-05-06 | 中交二公局萌兴工程有限公司 | Bridge and culvert abutment hanging plate support type foam light soil backfill construction method |
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| CN105000845A (en) * | 2015-06-29 | 2015-10-28 | 河南华泰建材开发有限公司 | Light foamed soil for abutment back backfilling and construction method |
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| CN103669291A (en) * | 2013-12-06 | 2014-03-26 | 浙江水利水电学院 | Method for constructing slope through connected slope bricks |
| CN103912001A (en) * | 2014-04-01 | 2014-07-09 | 中铁六局集团有限公司 | Roadbed piping trench backfill soil 'hierarchal overlapping' construction method |
| CN104912097A (en) * | 2015-06-08 | 2015-09-16 | 四川睿铁科技有限责任公司 | Novel retaining wall reverse-filtering drainage system and construction method |
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