CN106758623B - A kind of dam filling construction of the no muscle lightweight earthen platform back of the body - Google Patents
A kind of dam filling construction of the no muscle lightweight earthen platform back of the body Download PDFInfo
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- CN106758623B CN106758623B CN201611086009.4A CN201611086009A CN106758623B CN 106758623 B CN106758623 B CN 106758623B CN 201611086009 A CN201611086009 A CN 201611086009A CN 106758623 B CN106758623 B CN 106758623B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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Abstract
The invention discloses a kind of dam filling construction of the no muscle lightweight earthen platform back of the body, between the platform back of the body and non-lightweight are earth roadbed, zoned embankment forms first layer beam in length and breadth, the light soil of the earth roadbed use of conventional light is filled in the first layer space that beam is formed in length and breadth, after first layer fills, beam staggers and fills second layer beam in length and breadth in length and breadth with first layer, and the light soil of the earth roadbed use of conventional light is filled in the second layer space that beam is formed in length and breadth, carries out filling construction by that analogy.Sand pvc pipe is filled without earth roadbed middle lay of muscle lightweight, temperature stress is filled with release, and be used as subgrade drainage passage.The dam filling construction improves the tall and big earth roadbed bearing capacity of back of the body lightweight and stability, the present invention is avoided during filling using reinforcement materials such as bar-mat reinforcements simultaneously, not only saving construction cost, the earth roadbed globality of lightweight is strengthened, and beneficial to the later stage using the non-destructive testing technologies such as radar detection construction quality.
Description
Technical field
The present invention is that one kind is related to building engineering field, and in particular to a kind of dam filling construction of the no muscle lightweight earthen platform back of the body.
Background technology
It is coastal to arrive inland, highway, city expressway etc. from city to mountain area with the fast development of national economy
Mode of transportation has obtained extensive construction, and " bumping at bridge-head " phenomenon has a strong impact on the security and comfort of driving, all the time
Receive much concern." bumping at bridge-head " problem is handled by the basement process and strict back filling behind abutment of platform back of the body roadbed,
Remote yet with native source haul distance, construction site is narrow and small, and big machinery is using reasons such as difficulties, when roadbed treatment effect is carried on the back simultaneously in foreground
It is undesirable.Light soil severe is small, and intensity is high, the advantage such as easy for construction, can solve the expropriation of land of back filling behind abutment work progress
Remove, native source is nervous, operation side deficiency, the problems such as construction costs is big, have been to be concerned by more and more people.But in reality
In, light soil fills flood and fills general every layer of filling-up thickness requirement less than 1 meter；Back filling behind abutment light soil subgrade drainage is normal
Using pvc pipe bottom discharge, the shipwreck of roadbed is penetrated into discharge；Light soil reinforcement using transverse steel or lays bar-mat reinforcement more,
Cost is high, easily gets rusty, and globality is not strong, during such as load action, is also easy to produce and comes to nothing；Reinforcement lightweight is earth roadbed because of the shadow of internal reinforcing bar
Ring, radar can not be used to its Non-Destructive Testing；Because of the intrusion of rainwater, bubble structure is destroyed, and has a strong impact on that lightweight is earth roadbed
Stability and durability, meanwhile, cause water resource waste；And after the completion of construction, lightweight earthen platform the back of the body roadbed do not do generally into
The processing of one step, it is exposed in the people visual field by the outward appearance of concrete slab, influence the greening of surrounding environment and attractive in appearance.
The content of the invention
Situation about occurring for above-described lightweight earthen platform back of the body roadbed, the present invention propose a kind of without the muscle lightweight earthen platform back of the body
Dam filling construction, the purpose of the earth roadbed no muscle of lightweight, saving water resource and greening environment can be reached, effectively improve light soil
Globality, bearing capacity and the promotion ecological balance of roadbed.
The present invention to achieve the above object, is achieved through the following technical solutions：
A kind of dam filling construction of the no muscle lightweight earthen platform back of the body, the non-earth roadbed both sides grade of side slope of lightweight is 1：X, x take 1~
2, the dam filling construction comprises the following steps：
Step 1: carrying out classification on non-lightweight is earth roadbed cuts slope, multiple gradients are formed as 1:1~1:2 slope, every grade
A platform is formed between slope, berm width is 1.0~3.0 meters；
Step 2: translate h into roadbed center line in the non-lightweight of bottom two leg wire of slope of earth roadbed transverse direction1* at x rice,
The lateral baffle plate of first layer, the height h of the lateral baffle plate of first layer are set between the earth roadbed bottom slope of non-lightweight and works1For
1.5~3.5 meters, non-lightweight is earth roadbed, works and the lateral baffle plate of first layer enclose to form first layer filling the back of abutments region；
Step 3: in first layer filling the back of abutments region, it is single in the earth roadbed multiple longerons that are horizontally arranged at interval of non-lightweight
Individual longeron is longitudinally disposed along roadbed, and in the multiple crossbeams of longitudinally spaced setting of roadbed, single beam vertical is longitudinally disposed in roadbed,
Filling of surrounding of longitudinal and cross beam laid in region longitudinally, laterally with vertical pvc pipe, the pvc pipe connection shape in these three directions
Into cube rack, the wherein diameter D of pvc pipe is 80~110 millimeters, and the length L of every pvc pipe is 1.0~2.0 meters, pvc pipe
In fill medium coarse sand, the osmotic coefficient k value of medium coarse sand is 0.005cm/s≤k≤0.01cm/s；
Step 4: layering filling compression strength is q in the filling region that longitudinal and cross beam surrounds1Light soil, q1Value
Scope is 0.60MPa≤q1≤ 0.80MPa, every layer of packed height are h rice, 0.5≤h≤1.0；
Step 5: translate h into roadbed center line in the lateral baffle plate of first layer2At x rice, on the earth roadbed slope of non-lightweight and
The lateral baffle plate of the second layer, the height h of the lateral baffle plate of the second layer are set between works2For 1.5~3.5 meters, non-lightweight is earth roadbed
Slope, works and the lateral baffle plate of the second layer enclose to form second layer filling the back of abutments region；
Step 6: in second layer filling the back of abutments region, multiple longitudinal and cross beams are set, and it is longitudinal and transverse in the region
Beam is located at the longitudinal and transverse beam centre position in first layer filling the back of abutments region, into staggeredly arrangement states, in second layer longitudinal and cross beam
The laying in region of filling surrounded longitudinally, laterally connects to form cube rack with vertical pvc pipe, the pvc pipe in these three directions,
And connected in the vertical pvc pipe short transverse of the vertical pvc pipe and first layer of the second layer, surrounded in second layer longitudinal and cross beam
Layering filling compression strength is q in filling region2Light soil, 0.60MPa≤q2≤ 0.80MPa, every layer of packed height are h rice；
Third layer is filled by that analogy to m layer filling the back of abutments region, and the total number of plies in filling the back of abutments region is m, and m layers platform is carried on the back
Fill region and non-lightweight is earth roadbed flushes, m layer filling the back of abutments region height is hmRice, 1.5≤hm≤3.5；Indulged in m layers
Layering filling compression strength is q in the filling region that beam and crossbeam surroundmLight soil, 0.60MPa≤qm≤qm-1......≤
q2≤q1≤ 0.80MPa, every layer of packed height are h rice；
Step 7: the both lateral sides in top layer filling the back of abutments region open up light soil gutter, the light soil gutter
The earth roadbed both sides draining ditch depth h of the more non-lightweight of depthu, 0.3≤hu≤ 1.0 meters, when a rainfall is larger, the rainwater having more will be logical
Cross non-light soil subgrade drainage ditch discharge；The surface in light soil gutter is covered by water-proof concrete, prevents water from penetrating into light soil；
Horizontal pvc pipe in top layer filling the back of abutments region flushes with the bottom in light soil gutter, and inserts in light soil gutter.
Preferably, because lateral baffle plate is generally rectangular cross-section, the earth roadbed classification of non-lightweight cuts slope and slope occurs, lateral baffle plate with it is non-
There is space at the earth roadbed Slope Facies friendship of lightweight, should in slope type soil hand excavation's neck, in order to which lateral baffle plate is embedding
Among non-lightweight is earth roadbed, region is filled so as to be encircled into sealing.
Every layer of non-earth roadbed ramp height of lightweight is according to light soil filled height H values, and when H is more than 4 meters, classification is cut
Slope, every layer of 2~4 meters of ramp height span, when H is less than 4 meters, it can directly cut slope；Every grade of slope can fill 1~2 layer light
Matter soil.
As a preferred technical solution of the present invention, the size of longitudinal and transverse beam is in the step 3 and step 6：I-th
It along the longeron width of highway longitudinal direction is a that the size of layer beam in length and breadth, which is,iRice, filling region width is biRice, the horizontal crossbeam of highway are wide
Spend for ciRice, filling region width is diRice.Wherein 0.5m≤ai≤ai-1, 0.5m≤ci≤ci-1,1≤i≤m。
As a preferred technical solution of the present invention, the way of the longitudinal and transverse beam is formed to be enclosed by two pieces of steel forms
Rectangular channel, is used to through at pvc pipe on steel form offering diameter and is equal to the through hole in pvc pipe footpath, and steel is passed through in the through hole
Template and rectangular channel set diameter to be equal to the steel pipe in pvc pipe footpath, and compression strength is filled in i-th layer of filling the back of abutments region in rectangular channel
For σiLight soil, wherein 1.4MPa≤σ1≤ 1.6MPa, σ1≥σ2≥......≥σi≥......≥σm, 0.8MPa≤σm≤
1.0MPa。
As a preferred technical solution of the present invention, described every layer lateral baffle plate junction bituminous seal, Ran Hou
Mulching soil on the step that lateral baffle plate is formed, forms the side slope consistent with the earth roadbed both sides grade of side slope of non-lightweight, and sow
Vegetation.
As a preferred technical solution of the present invention, the both ends sealing of the longitudinal direction and vertical pvc pipe, horizontal pvc pipe
Both ends pass through lateral baffle plate, the both ends of horizontal pvc pipe seal outlet using filter screen, and top layer transverse direction pvc pipe length direction is by two
The gradient for having 2%~5% to centre is held, other horizontal pvc pipe length directions have 2%~5% gradient from centre to both ends, with
It is easy to store up draining.
Sand pvc pipe is filled without earth roadbed middle lay of muscle lightweight, temperature stress is filled with release, and be used as subgrade drainage passage.
The dam filling construction make in length and breadth beam formed to fill light soil intensity in space and reach and have confined compressive strength, so as to improve tall and big
The earth roadbed bearing capacity of lightweight and stability are carried on the back, while the present invention is avoided during filling using reinforcement materials such as bar-mat reinforcements,
Not only saving construction cost, the earth roadbed globality of lightweight is strengthened, and beneficial to the later stage using the non-destructive testing technologies such as radar detection work
Cheng Zhiliang.
Compared with prior art, the present invention has the beneficial effect that：
1st, without muscle filling construction.The filling region that beam surrounds with it in length and breadth is filled using light soil, and light soil intensity is only
Adjusted by the match ratio of different cement, water and bubble, without admixture, and in subgrade construction process without reinforcement, single material
The high intensity filling region collective effect that beam surrounds with it in length and breadth, enhance roadbed globality.
2nd, subgrade strength is improved.The layering of high intensity beam in length and breadth is staggered, and reaching fill area light soil intensity has
Confined compressive strength, so as to improve tall and big back of the body lightweight in the presence of high intensity in length and breadth beam and the filling light soil for having lateral spacing
Earth roadbed bearing capacity and stability.
3rd, Non-Destructive Testing.Avoid using the reinforcement materials such as bar-mat reinforcement, not only saving construction cost, and beneficial to the later stage using radar etc.
Non-destructive testing technology detects construction quality.
4th, accelerating construction progress.Tile and hierarchy fills, and every layer of filling-up thickness rationally increases, and each segmented areas solidifies respectively,
Construct the gapless phase, effective accelerating construction progress.
5th, roadbed is protected.Earth roadbed middle lay of lightweight fills sand pvc pipe, fills temperature stress with release, and arrange as roadbed
Aquaporin, strengthen the earth roadbed globality of lightweight.Protected around light soil using waterproof material, it is effectively anti-with vegetative coverage
Sealing point is penetrated into light soil, protects light soil bubble structure.
6th, water-saving and environmental protection.By the filling sand pvc pipe arranged in length and breadth, effectively storage discharge rainwater, irrigated by sand seepage flow
Roadbed both sides side slope vegetation, saving water resource, and roadbed both sides staged is filled, and mulching soil, sowing planting quilt, is advantageous to beautify
And environmental protection, promote the ecological balance.
Brief description of the drawings
Fig. 1 is roadbed filling skiagraph of the present invention；
X is along the longitudinal direction of roadbed in Fig. 1, and Y is the transverse direction of vertical roadbed, and Z is perpendicular to the ground vertical；
Fig. 2 is roadbed filling horizontal sectional drawing of the present invention, i.e. A-A profiles in Fig. 1；
Fig. 3 is roadbed filling cross-sectional view of the present invention, i.e. B-B profiles in Fig. 1；
Fig. 4 is continuous two layers each segmented areas schematic diagram of roadbed filling of the present invention；
4a is the longitudinal and transverse beam distributed architecture in first layer filling the back of abutments region in Fig. 4；4b is second layer filling the back of abutments region
Interior longitudinal and transverse beam distributed architecture；
Fig. 5 is roadbed placement in layers schematic cross-sectional view of the present invention.
In figure marked as：1st, works；2nd, non-lightweight is earth roadbed；3rd, slope；4th, platform；5th, medium coarse sand；6th, lateral baffle plate；
7th, light soil gutter；8th, horizontal pvc pipe；9th, vertical pvc pipe；10th, non-light soil roadbed side slope；11st, longeron；12nd, crossbeam.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
As Figure 1-5, the present invention relates to works 1, non-lightweight be earth roadbed 2, slope 3, platform 4, medium coarse sand 5, lateral
Baffle plate 6, light soil gutter 7, horizontal pvc pipe 8, vertical pvc pipe 9, non-light soil roadbed side slope 10, longeron 11, crossbeam 12 etc.
Technical characteristic.
Heretofore described works such as abutment, lateral baffle plate are precast slab.X is along roadbed in the present invention
Longitudinal direction, Y is the transverse direction of vertical roadbed, and Z is perpendicular to the ground vertical；Therefore the beam laid along the direction of roadbed is referred to as longeron,
The beam of the direction laying of vertical roadbed is referred to as crossbeam.
A kind of dam filling construction of the no muscle lightweight earthen platform back of the body, the described back of the body are described non-light between works and old road base
The earth roadbed both sides grade of side slope of matter is 1：X, x take 1~2, and the dam filling construction comprises the following steps：
Step 1: carrying out classification on non-lightweight is earth roadbed cuts slope, multiple gradients are formed as 1:1~1:2 slope, every grade
A platform is formed between slope, berm width is 1.0m~3.0m；
Non- lightweight is earth roadbed to cut slope with the earth roadbed junction of lightweight, earth roadbed need to decompose of non-lightweight, every grade of slope indwelling platform,
It can prevent non-lightweight is earth roadbed to collapse, while be easy to non-light soil Roadbed Soil to be closely connected with light soil.Wherein, classification is cut
Slope range of grade is 1:1~1:2, berm width is 1.0m~3.0m, domatic to use engineering mechanical ramming, prevents the soil body from loosely sliding
Fall.
Step 2: translate h into roadbed center line in the non-lightweight of bottom two leg wire of slope of earth roadbed transverse direction1At x rice, non-
The lateral baffle plate of first layer, the height h of the lateral baffle plate of first layer are set between the earth roadbed bottom slope of lightweight and works1For 1.5m
~3.5m, non-lightweight is earth roadbed, works and the lateral baffle plate of first layer enclose to form first layer filling the back of abutments region；
Step 3: in first layer filling the back of abutments region, it is single in the earth roadbed multiple longerons that are horizontally arranged at interval of non-lightweight
Individual longeron is longitudinally disposed along roadbed, and in the multiple crossbeams of longitudinally spaced setting of roadbed, single beam vertical is longitudinally disposed in roadbed,
Filling of surrounding of longitudinal and cross beam laid in region longitudinally, laterally with vertical pvc pipe, the pvc pipe connection shape in these three directions
Into cube rack, the wherein diameter D of pvc pipe is 80~110mm, and the length L of every pvc pipe is 1.0~2.0m, in pvc pipe
Medium coarse sand is filled, the osmotic coefficient k value of medium coarse sand is 0.005cm/s≤k≤0.01cm/s；
Step 4: layering filling compression strength is q in the filling region that longitudinal and cross beam surrounds1Light soil, q1Value
Scope is 0.60MPa≤q1≤ 0.80MPa, every layer of packed height are h, 0.5m≤h≤1.0m；
Step 5: translate h into roadbed center line in the lateral baffle plate of first layer2At x rice, on the earth roadbed slope of non-lightweight and
The lateral baffle plate of the second layer, the height h of the lateral baffle plate of the second layer are set between works2It is earth roadbed for 1.5m~3.5m, non-lightweight
Slope, works and the lateral baffle plate of the second layer enclose to form second layer filling the back of abutments region；
Step 6: in second layer filling the back of abutments region, multiple longitudinal and cross beams are set, and it is longitudinal and transverse in the region
Beam is located at the longitudinal and transverse beam centre position in first layer filling the back of abutments region, into staggeredly arrangement states, in second layer longitudinal and cross beam
The laying in region of filling surrounded longitudinally, laterally connects to form cube rack with vertical pvc pipe, the pvc pipe in these three directions,
And connected in the vertical pvc pipe short transverse of the vertical pvc pipe and first layer of the second layer, surrounded in second layer longitudinal and cross beam
Layering filling compression strength is q in filling region2Light soil, 0.60MPa≤q2≤ 0.80MPa, every layer of packed height are h；
It is earth roadbed to m layer filling the back of abutments region, m layer filling the back of abutments regions and non-lightweight that third layer is filled by that analogy
Flush, m layer filling the back of abutments region height is hm, 1.5m≤hm≤3.5m；In the filling region that m layer longitudinal and cross beams surround
Interior layering filling compression strength is qmLight soil, 0.60MPa≤qm≤qm-1......≤q2≤q1≤ 0.80MPa, every layer is filled out
It is h to fill height；
Step 7: the both lateral sides in top layer filling the back of abutments region open up light soil gutter, the light soil gutter
The earth roadbed both sides draining ditch depth h of the more non-lightweight of depthu, 0.3m≤hu≤ 1.0m, when a rainfall is larger, the rainwater having more will be logical
Cross non-light soil subgrade drainage ditch discharge；The surface in light soil gutter is covered by water-proof concrete, prevents water from penetrating into light soil；
Horizontal pvc pipe in top layer filling the back of abutments region flushes with the bottom in light soil gutter, and inserts in light soil gutter.
Longitudinal direction of the present invention and the sealing of the both ends of vertical pvc pipe, the both ends of horizontal pvc pipe pass through lateral baffle plate, laterally
The both ends of pvc pipe seal outlet using filter screen, and top layer transverse direction pvc pipe length direction has 2%~5% slope from both ends to centre
Degree, other horizontal pvc pipe length directions have 2%~5% gradient from centre to both ends, in order to draining.
Every layer of the present invention lateral baffle plate junction bituminous seal, then covered on the step that lateral baffle plate is formed
Soil, mulching soil thickness are more than 30cm, form the side slope consistent with the earth roadbed both sides grade of side slope of non-lightweight, and sowing planting
Quilt.
Step 3 and the way of the longitudinal and transverse beam of step 6 form rectangular channel to be enclosed by two pieces of steel forms, are used on steel form
The through hole that diameter is equal to pvc pipe is offered at through pvc pipe, and diameter etc. is set through steel form and rectangular channel in the through hole
In the steel pipe of pvc pipe, it is σ that compression strength is filled in i-th layer of filling the back of abutments region in rectangular channeliLight soil, wherein 1.4MPa
≤σ1≤ 1.6MPa, σ1≥σ2≥......≥σi≥......≥σm, 0.8MPa≤σm≤1.0MPa。
As shown in figure 4, steel form forms longitudinal and transverse beam, longitudinal and transverse beam fills region by every layer and is separated to form multiple reclamation districts
The size of domain, longitudinal and transverse beam and filling region is：It along the longeron width of highway longitudinal direction is a that the size of i-th layer of beam in length and breadth, which is,i, filling
Peak width is bi, the horizontal beam width of highway is ci, filling region width is di.Wherein 0.5m≤ai≤ai-1, 0.5m≤ci
≤ci-1,1≤i≤m.The layering filling pressure resistance in the filling region that longitudinal and cross beam surrounds
Spend for qiLight soil, 0.60MPa≤qi≤ 0.80MPa, every layer of packed height are h, 0.5m≤h≤0.8m.
Embodiment
Be saturated sand in pvc pipe in the present embodiment, in normal maintenance processes, roadbed width W, platform carries on the back roadbed length Lu, when
When gutter fills water, capacity V is
V=2WLuhu (1)
Laterally about n is individual altogether for outlet for roadbed both sides pvc pipe, discharge area
S=n π D2/4 (2)
Water storage is gradually fed by slope-protecting vegetation soil by saturation medium coarse sand in pvc pipe, it is necessary to the time about
T=V/kS (3)
In the present embodiment, there is fill area every layer of interlaced arrangement of beam, centre in length and breadth, by every layer of lightweight it is earth roadbed be reduced to it is multiple
Ground is closed, beam is considered as " cross pile " in length and breadth, and filling light soil is considered as the soil body, and each layer of bearing capacity can be according to Bearing Capacity of Composite Foundation
Calculate, according to《Building foundation treatment technical specification》(JGJ78-2012), first layer lightweight soil bearing capacity is
f1=β1×σ1+0.95×(1-β1)×q1 (4)
M layer lightweight soil bearing capacities are
fm=βm×σm+0.95×(1-βm)×qm (5)
β is beam area replacement ratio in length and breadth
Particularly, when roadbed width W=35m, platform carry on the back roadbed length Lu=30m, roadbed height H=10m, old road Ji Xiao slopes
The gradient is 1:1, berm width 2.0m, the common 14m of platform slope length, medium coarse sand osmotic coefficient k=0.008cm/s, pvc pipe are straight
Footpath is d=110mm, is L=1.0m per root long degree, both sides pvc pipe delivery port about 720, fills region height h1=h2=
3.0m,h3=h4=2.0m, every layer of light soil filled height h=1.0m of filling region, from 3 kinds of strength lightweight soil, q1=q2=
q3=q4=0.6MPa, σ1=σ2=1.4MPa, σ3=σ4=0.8MPa, in length and breadth beam width a1=a2=1.5m, a3=a4=
1.0m, c1=c2=1.5m, c3=c4=1.0m, fill area size are b1=b2=5.0m, b3=b4=5.5m, d1=d2=
4.0m, d3=d4During=4.5m, above parameter substitutes into (1)~(6) formula, obtains
When gutter fills water, capacity V is：
V=2WLuhu=2 × 35 × (30+14) × 0.5=1540m3
Laterally outlet is common about 720 for roadbed both sides pvc pipe, discharge area
S=720 × π d2/ 4=0.112π/4=6.84m2
Water storage is gradually fed by slope-protecting vegetation soil by saturation medium coarse sand in pvc pipe, it is necessary to the time about
T=V/kS=1540/8 × 10-5× 6.84=2.8 × 106S=32d
Beam area replacement ratio in length and breadth
Fill region first layer and second layer bearing capacity is
f1=f2=β1×σ1+0.95×(1-β1)×q1=1.04MPa
Fill region third layer and the 4th layer of bearing capacity is
f3=f4=β3×σ3+0.95×(1-β3)×q3=0.64MPa
Roadbed bottom and bearing capacity relatively general lightweight in top is earth roadbed is significantly improved, disclosure satisfy that design bearing capacity
It is required that.For drought area, by the construction method of the present invention, consider the factors such as evaporation, can at least meet 20~30 days
Soil water supply.It is recommended that water curing and gutter water filling work are shone in the vegetation top layer of 10~15 days dry seasons once.
Claims (5)
1. a kind of dam filling construction of the no muscle lightweight earthen platform back of the body, for the described back of the body between works and non-lightweight are earth roadbed, it is special
Sign is：The earth roadbed both sides grade of side slope of non-lightweight is 1：X, x take 1~2, and the dam filling construction comprises the following steps：
Step 1: carrying out classification on non-lightweight is earth roadbed cuts slope, multiple gradients are formed as 1:1~1:2 slope, every grade of slope
Between formed a platform, berm width be 1~3 meter；
Step 2: translate h into roadbed center line in the non-lightweight of bottom two leg wire of slope of earth roadbed transverse direction1* at x rice, x takes 1~2,
The lateral baffle plate of first layer, the height h of the lateral baffle plate of first layer are set between the earth roadbed bottom slope of non-lightweight and works1For
1.5~3.5 meters, non-lightweight is earth roadbed, works and the lateral baffle plate of first layer enclose to form first layer filling the back of abutments region；
Step 3: in first layer filling the back of abutments region, it is single vertical in the earth roadbed multiple longerons that are horizontally arranged at interval of non-lightweight
Beam is longitudinally disposed along roadbed, and in the multiple crossbeams of longitudinally spaced setting of roadbed, single beam vertical is longitudinally disposed in roadbed, vertical
Laying that what beam and crossbeam surrounded fill in region longitudinally, laterally with vertical pvc pipe, the pvc pipe in these three directions connect to be formed it is vertical
The diameter D of cube rack, wherein pvc pipe is 80~110 millimeters, and the length L of every pvc pipe is 1.0~2.0 meters, is filled in pvc pipe
Full medium coarse sand, the osmotic coefficient k value of medium coarse sand is 0.005cm/s≤k≤0.01cm/s；
Step 4: layering filling compression strength is q in the filling region that longitudinal and cross beam surrounds1Light soil, q1Span
For 0.60MPa≤q1≤ 0.80MPa, every layer of packed height are h, 0.5≤h≤1.0 meter；
Step 5: translate h into roadbed center line in the lateral baffle plate of first layer2* at x rice, x takes 1~2, earth roadbed tiltedly in non-lightweight
The lateral baffle plate of the second layer, the height h of the lateral baffle plate of the second layer are set between slope and works2For 1.5~3.5 meters, non-light soil
Roadbed slope, works and the lateral baffle plate of the second layer enclose to form second layer filling the back of abutments region；
Step 6: in second layer filling the back of abutments region, multiple longitudinal and cross beams, and the longitudinal and transverse beam position in the region are set
In the centre position of longitudinal and transverse beam in first layer filling the back of abutments region, in staggeredly arrangement states, surrounded in second layer longitudinal and cross beam
Laying of filling in region longitudinally, laterally connect to form cube rack with vertical pvc pipe, the pvc pipe in these three directions, and the
Connected in the vertical pvc pipe short transverse of two layers of vertical pvc pipe and first layer, in the filling that second layer longitudinal and cross beam surrounds
Layering filling compression strength is q in region2Light soil, 0.60MPa≤q2≤ 0.80MPa, every layer of packed height are h；
Third layer is filled by that analogy to m layer filling the back of abutments region, and the total number of plies in filling the back of abutments region is m, m layer filling the back of abutments
Region with non-lightweight is earth roadbed flushes, m layer filling the back of abutments region height is hm, 1.5≤hm≤ 3.5 meters, non-lightweight is earth roadbed tiltedly
Slope, works and the lateral baffle plate of m layers enclose to form m layer filling the back of abutments region, in the filling that m layer longitudinal and cross beams surround
Layering filling compression strength is q in regionmLight soil, 0.60MPa≤qm≤qm-1......≤q2≤q1≤ 0.80MPa, often
Layer packed height is h；
Step 7: the both lateral sides in top layer filling the back of abutments region open up light soil gutter, the depth in the light soil gutter
The more non-earth roadbed both sides draining ditch depth h of lightweightu, 0.3≤hu≤ 1.0 meters, when a rainfall is larger, the rainwater having more will pass through
Non- light soil subgrade drainage ditch discharge；The surface in light soil gutter is covered by water-proof concrete, prevents water from penetrating into light soil；Top
Horizontal pvc pipe in layer filling the back of abutments region flushes with the bottom in light soil gutter, and inserts in light soil gutter.
2. the dam filling construction of the no muscle lightweight earthen platform back of the body according to claim 1, it is characterised in that the step 3 and step
The size of longitudinal and transverse beam is in six：It along the longeron width of highway longitudinal direction is a that the size of i-th layer of beam in length and breadth, which is,iRice, fill area field width
Spend for biRice, the horizontal beam width of highway is ciRice, filling region width is diRice, wherein 0.5≤ai≤ai-1, 0.5≤ci≤
ci-1,1≤i≤m。
3. the dam filling construction of the no muscle lightweight earthen platform back of the body according to claim 2, it is characterised in that the longitudinal and transverse beam is done
Method forms rectangular channel to be enclosed by two pieces of steel forms, is used to through at pvc pipe offer diameter on steel form equal to pvc pipe footpath
Through hole, and diameter is set equal to the steel pipe in pvc pipe footpath, the 1st floor filling the back of abutments area through steel form and rectangular channel in the through hole
It is σ that compression strength is filled in the rectangular channel in domain1Light soil, compression strength is filled in i-th layer of filling the back of abutments region in rectangular channel
For σiLight soil, wherein being 1.4MPa≤σ1≤ 1.6MPa, σ1≥σ2≥......≥σi≥......≥σm, 0.8MPa≤σm
≤1.0MPa。
4. the dam filling construction of the no muscle lightweight earthen platform back of the body according to claim 1, it is characterised in that every layer of lateral baffle plate connection
Place's bituminous seal, then the mulching soil on the step that lateral baffle plate is formed, is formed and the earth roadbed both sides Slope of non-lightweight
Spend consistent side slope, and sowing planting quilt.
5. the dam filling construction of the no muscle lightweight earthen platform back of the body according to claim 1, it is characterised in that longitudinal direction and vertical pvc pipe
Both ends sealing, the both ends of horizontal pvc pipe pass through lateral baffle plate, and the both ends of horizontal pvc pipe seal outlet, top layer horizontal stroke using filter screen
There is from both ends to centre 2%~5% gradient to pvc pipe length direction, other horizontal pvc pipe length directions are from centre to both ends
There is 2%~5% gradient, in order to store up draining.
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| CN107245912B (en) * | 2017-07-03 | 2019-04-30 | 中国铁道科学研究院铁道建筑研究所 | A kind of Foam lightweight soil railway bed structure and engineering method |
| CN107938457B (en) * | 2017-12-25 | 2023-05-09 | 浙江大学城市学院 | Highway roadbed river filling structure adjacent to existing subway facilities and construction method |
| CN108677637B (en) * | 2018-04-28 | 2020-12-08 | 中交三航局第三工程有限公司 | Roadbed filling method for precast concrete pipe joint reinforced lightweight soil |
| CN111074908B (en) * | 2019-12-26 | 2024-07-16 | 广东省建筑工程机械施工有限公司 | Device for backfilling back of narrow space and method for backfilling narrow space of back of table |
| CN113308955B (en) * | 2021-05-17 | 2023-03-31 | 浙大城市学院 | Construction method of cast-in-place concrete full-protection foam light soil wide-spliced embankment |
| CN114318991B (en) * | 2022-02-22 | 2023-11-10 | 山东省交通规划设计院集团有限公司 | Highway bench back structure in plain area, highway structure and construction method |
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