CN107034789A - Abutment Back combination backfill construction method - Google Patents
Abutment Back combination backfill construction method Download PDFInfo
- Publication number
- CN107034789A CN107034789A CN201710358010.6A CN201710358010A CN107034789A CN 107034789 A CN107034789 A CN 107034789A CN 201710358010 A CN201710358010 A CN 201710358010A CN 107034789 A CN107034789 A CN 107034789A
- Authority
- CN
- China
- Prior art keywords
- backfill
- soil
- construction method
- abutment
- lightweight foam
- 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.)
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Classifications
-
- 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
Abstract
The invention discloses a kind of Abutment Back combination backfill construction method, comprise the following steps：Platform is carried on the back to the region surrounded with retaining wall and uses good earthen backfill；The backfill that platform is carried on the back into the U-shaped region formed with retaining wall excavates and cleared up to form the step-like white space of inverted triangle；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, the occurrence of reducing jump car 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 method.
Background technology
Due to the bridge platform back of the body within the specific limits, especially on the inside of platform parados, compacting operation face is narrow and small and can not use strong
Press equipment so that be relatively inaccessible at regulation compaction requirement, the platform back of the body Subgrade Compaction Quality compared with open section of roadbed filling quality
Compared with congenital to there is inferior position, load repeated action easily causes the Compression Settlement of roadbed at the platform back of the body after being open to traffic.Roadbed is carried on the back with platform 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 jump car phenomenon, and what influence was driven a vehicle relaxes
Adaptive, the infringement on accelerating structure thing and road surface.
The content of the invention
It is a primary object of the present invention to provide a kind of Abutment Back combination 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 car probability.
To achieve the above object, the present invention provides a kind of Abutment Back combination backfill construction method, comprises the following steps：
Platform is carried on the back to the region surrounded with retaining wall and uses good earthen backfill；
The backfill that platform is carried on the back into the U-shaped region formed with retaining wall excavates and cleared up to form the step-like white space of inverted triangle；
Backfilled in the step-like white space of inverted triangle using lightweight foam soil.
Preferably, the step of region that the platform back of the body and retaining wall are surrounded uses good earthen backfill specifically includes：
Cleaning substrate simultaneously carries out surveying and locating；
During using backfill earthen backfill, place Min layers soil and compaction in layers are carried out.
Preferably, during 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 sets multiple check points for every layer per side, compactness is qualified after testing to fill again
Next layer.
Preferably, to backfill carry out compaction in layers when, using vibrated roller carry out voltage stabilizing and it is low shake repeatedly after, pass through
Road roller carries out static pressure until using the compacting of compacting equipment to prevent without obvious wheelmark, and for abutment and both sides retaining wall periphery
Damage to periphery wall.
Preferably, the backfill that platform is carried on the back into the U-shaped region formed with retaining wall excavates and cleared up to form inverted triangle
The step of step-like white space, specifically includes：
The backfill for carrying on the back the U-shaped region formed with retaining wall to platform using excavator is excavated, and is carried on the back until digging to retaining wall and platform
Footing bottom, excavation region bottom width is 80-100cm, and white space side is retaining wall or abutment, and opposite side presses 1:1 puts
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.
Preferably, it is described the step of backfilled in the step-like white space of inverted triangle using lightweight foam soil in, adopt
Lightweight foam soil is filled with hierarchical block mode, lift height is consistent with backfill shoulder height.
Preferably, it is described the step of backfilled in the step-like white space of inverted triangle using lightweight foam soil in, from
Bottom is started at, in lightweight foam soil back filled region, is set layer of steel wire net every the first preset height, is set every the second preset height
One of movement joint is put, the movement joint is using pitch deals and through whole Foam lightweight soil back filled region.
Preferably, using pump line conveying when pouring lightweight foam soil, and pump line discharging opening and surface of filling keep level with
Reduce and uncured lightweight foam soil is disturbed.
Preferably, when lightweight foam soil is backfilled, the slamp value, cement mortar and light soil of lightweight foam soil are mixed and stirred
Thing unit weight is detected and measured to adjust filling for lightweight foam soil in real time.
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.
Abutment Back combination backfill construction method proposed by the present invention, the U-shaped region that the platform back of the body is formed with retaining wall
Backfill is excavated and filled with lightweight foam soil, solves the problem of traditional construction compactness does not reach requirement, is reduced 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, its cost can be substantially reduced.
Brief description of the drawings
Fig. 1 is the plan that Abutment Back of the present invention combines U-shaped region grooving in backfill construction method；
Fig. 2 is the sectional view that Abutment Back of the present invention combines U-shaped region grooving in backfill construction method；
Fig. 3 is the schematic flow sheet that Abutment Back of the present invention combines backfill construction method；
Fig. 4 is the refinement schematic flow sheet that Abutment Back of the present invention combines step S10 in backfill construction method；
Fig. 5 is the refinement schematic flow sheet that Abutment Back of the present invention combines step S20 in backfill construction method.
In figure, the 1- bridges platform back of the body, 2- retaining walls, the step-like U-lags of 3-, 4- backfills, 5- lightweight foam soils.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
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
Suddenly：
Step S10, platform is carried on the back the region surrounded with retaining wall and uses good earthen backfill；
Step S20, the backfill that platform is carried on the back into the U-shaped region formed with retaining wall excavates and cleared up to form the step-like sky of inverted triangle
White region；
Step S30, is backfilled in the step-like white space of inverted triangle using lightweight foam soil.
Specifically, reference picture 4, step S10 is specifically included：
Step S101, clears up substrate and carries out surveying and locating；
When clearing up substrate, cleaning depth is controlled with earth-retaining footing of wall bottom, need to be changed and filled out if any overly moist situation.Put with total powerstation
Go out center line and side slope line, and measure substrate away from the roadbed top surface discrepancy in elevation, mark is carried out every 10m.
Step S102, during using backfill earthen backfill, carries out place Min layers soil and compaction in layers.
Specific using often filling out one layer, one layer of compacting detects one layer, and it is per every layer of the side multiple check points of setting to check frequency
（Per side in no less than three points, the present embodiment, check that frequency respectively examines three points per every layer of side left, center, right, U-shaped is referred to per side
Three sides）, compactness is qualified after testing to fill next layer again.So as to ensure that the intensity of each layer of backfill.Backfill is selected
Internal friction angle is big, granule strength is higher 4% is choked dirt.When large area paving is banketed, paving fills out section length for 20m every time, and width is
6m, paving soil, which is layered, to be carried 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.
To backfill carry out compaction in layers when, using vibrated roller carry out voltage stabilizing and it is low shake repeatedly after, pass through road roller
Static pressure is carried out until using the compacting of compacting equipment to prevent to periphery without obvious wheelmark, and for abutment and both sides retaining wall periphery
The damage of wall.In the present embodiment, voltage stabilizing is first carried out using vibrated roller, it is then low to shake 2 times, finally with 18t road roller
Static pressure is carried out, 1/3 wheel that staggers when rolling every time is wide, until without obvious wheelmark.Detect compactness, it is ensured that nucleus compactness is not
Less than 96%.Have compacting using small rammer for abutment and both sides retaining wall periphery, and prevent the damage to periphery wall.
Good earthen backfill should carry out deflection testing after finishing.
Specifically, reference picture 5, step S20 is specifically included：
Step S201, the backfill for carrying on the back the U-shaped region formed with retaining wall to platform using excavator is excavated, and earth-retaining is arrived until digging
Wall and platform back of the body footing bottom, excavation region bottom width is 80-100cm, and white space side is retaining wall or abutment, opposite side
By 1:1 slope is to form inverted trapezoidal excavation face；
Mechanical equivalent of light excavation should reduce the disturbance to Core Soil, and excavation must not damage wall.
Step S202, slope inclined-plane is trimmed to step-like（Manual cleaning can be taken）, the wide 30-50cm of every grade of step, height
30-50cm, so as to form an inverted triangle stepped regions.
In step S30, lightweight foam soil, lift height and backfill shoulder height one are filled using hierarchical block mode
Cause.Lightweight foam soil backfill region side is wall, opposite side position Core Soil, it is therefore not necessary to set template.Using hierarchical block
Mode fills lightweight foam soil, strengthens conscientiously refill quality, reduces backfill region differential settlement, reduces later stage disease
Occur.
In step S30, started at from bottom, in lightweight foam soil back filled region, every the first preset height（Set in the present embodiment
Put at interval of 2 meters）Layer of steel wire net is set, every the second preset height（Set in the present embodiment at interval of 20 meters）Set together
Movement joint.Movement joint is using pitch deals and through whole Foam lightweight soil back filled region.
Further, conveyed when pouring lightweight foam soil using pump line, and the discharging opening of pump line keeps level with surface of filling
To reduce to uncured lightweight foam soil disturbance.Conveyed when lightweight foam soil is poured using pump line, it may be achieved long distance delivery
Pour.The discharging opening of pump line and surface of filling are kept into level, reduces and uncured lightweight foam soil is disturbed, make bubble froth breaking amount
It is minimized, it is ensured that filled soils.
Further, when lightweight foam soil is backfilled, the slamp value, cement mortar and light soil of lightweight foam soil are mixed
Detected and measured with thing unit weight to adjust filling for lightweight foam soil in real time.
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）.
Abutment Back combination backfill construction method proposed by the present invention, the U-shaped region that the platform back of the body is formed with retaining wall
Backfill is excavated and filled with lightweight foam soil, solves the problem of traditional construction compactness does not reach requirement, is reduced 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, its cost can also be substantially reduced.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure transformation that bright specification and accompanying drawing content are made, or other related technical fields are directly or indirectly used in,
Similarly it is included within the scope of the present invention.
Claims (10)
1. a kind of Abutment Back combination backfill construction method, it is characterised in that comprise the following steps：
Platform is carried on the back to the region surrounded with retaining wall and uses good earthen backfill；
The backfill that platform is carried on the back into the U-shaped region formed with retaining wall excavates and cleared up to form the step-like white space of inverted triangle；
Backfilled in the step-like white space of inverted triangle using lightweight foam soil.
2. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised in that described by the platform back of the body and retaining wall
The step of region surrounded uses good earthen backfill specifically includes：
Cleaning substrate simultaneously carries out surveying and locating；
During using backfill earthen backfill, place Min layers soil and compaction in layers are carried out.
3. Abutment Back combination backfill construction method as claimed in claim 2, it is characterised in that described using backfill earthen backfill
When, carry out in the step of place Min layers soil and compaction in layers, using often filling out one layer, be compacted one layer, detect one layer, check that frequency is every
Every layer of side sets multiple check points, and compactness is qualified after testing to fill next layer again.
4. Abutment Back combination backfill construction method as claimed in claim 3, it is characterised in that layering pressure is carried out to backfill
In real time, using vibrated roller carry out voltage stabilizing and it is low shake repeatedly after, static pressure is carried out by road roller until without obvious wheelmark, and right
The compacting of compacting equipment is used to prevent the damage to periphery wall in abutment and both sides retaining wall periphery.
5. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised in that described by the platform back of the body and retaining wall
The backfill in the U-shaped region formed, which is excavated and clears up the step of forming inverted triangle step-like white space, to be specifically included：
The backfill for carrying on the back the U-shaped region formed with retaining wall to platform using excavator is excavated, and is carried on the back until digging to retaining wall and platform
Footing bottom, excavation region bottom width is 80-100cm, and white space side is retaining wall or abutment, and opposite side presses 1:1 puts
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.
6. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised 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 shoulder height.
7. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised in that described step-like in inverted triangle
In the step of being backfilled in white space using lightweight foam soil, started at from bottom, in lightweight foam soil back filled region, Mei Ge
One preset height sets layer of steel wire net, and one of movement joint is set every the second preset height, and the movement joint uses pitch China fir
Plate and through whole Foam lightweight soil back filled region.
8. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised in that adopted when pouring lightweight foam soil
Conveyed with pump line, and the discharging opening of pump line is disturbed with surface of filling holding level with reducing to uncured lightweight foam soil.
9. Abutment Back combination backfill construction method as claimed in claim 1, it is characterised in that returned in lightweight foam soil
When filling out, the slamp value of lightweight foam soil, cement mortar and light soil mix unit weight are detected and measured with to light foam
Filling for soil is adjusted in real time.
10. Abutment Back combination backfill construction method as in one of claimed in any of claims 1 to 9, it is characterised 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.
Priority Applications (1)
| 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 |
|---|---|---|---|
| CN201710358010.6A CN107034789B (en) | 2017-05-19 | 2017-05-19 | Abutment Back combination backfill construction method |
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| CN107034789A true CN107034789A (en) | 2017-08-11 |
| CN107034789B CN107034789B (en) | 2019-08-23 |
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Cited By (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 |
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Cited By (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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| Publication number | Publication date |
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| CN107034789B (en) | 2019-08-23 |
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