CN106193057A - The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil - Google Patents
The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil Download PDFInfo
- Publication number
- CN106193057A CN106193057A CN201610519896.3A CN201610519896A CN106193057A CN 106193057 A CN106193057 A CN 106193057A CN 201610519896 A CN201610519896 A CN 201610519896A CN 106193057 A CN106193057 A CN 106193057A
- Authority
- CN
- China
- Prior art keywords
- pccp
- filling
- pipe
- quality
- axil
- 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
Links
Classifications
-
- 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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/12—Back-filling of foundation trenches or ditches
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses the construction method improving PCCP installation axil angle digging up and filling in quality on a kind of subsoil, relate to Prestressed concrete cylinder pipe (being called for short PCCP) installation field.It includes mechanical equivalent of light excavation；The most levelling, two-wheel vibroroller cmpacting is closely knit；Backfill medium coarse sand, grinding compacting；PCCP pipeline is installed；Fill arc basis in both sides at the bottom of pipe with medium coarse sand, vibratory rammer, vibratory tamper is tamped, then stone simultaneously, and compacting is until reaching the work surface of two-wheel vibrating roller；Two-wheel vibrating roller is compacted.Which overcoming the time-consuming feed consumption of prior art, quality can not be guaranteed, it is difficult to the shortcoming that pipeline is formed effectively support.It is high that the present invention has efficiency of construction, and consumptive material is few, and qualification rate is high, the advantage that risk is low.
Description
Technical field
The present invention relates to Prestressed concrete cylinder pipe (being called for short PCCP) installation field, a kind of natural
Improve PCCP on ground and the construction method of axil angle digging up and filling in quality is installed.
Background technology
Prestressed concrete cylinder pipe (being called for short PCCP i.e. Prestressed Concrete Cylinder Pipe) is extensively
It is applied to long distance water diversion engineering, high-pressure feed water pipeline engineering, high earthing diversion works etc..Research shows, PCCP is as one
Rigid conduit, comprcssive strength is high, but between adjacent two pipes, seam is its weak link.It is unsatisfactory for as back of pipeline tamps real mass
Requirement, will result directly in it and produces differential settlement, thus cause relative rotation between pipe joint more than code requirement, to be led
Cause destruction, seepage even booster, affect its service life and engineering safety.Therefore, to back of pipeline matrix amount, especially axil at the bottom of pipe
In angle range, backfill prescription is the highest, but owing to being not easy to big machinery construction in pipeline axil angle range, it is difficult to ensure that compacting
Quality.Therefore, how to form axil angle at the bottom of pipe, and improve the problem that axil angular convolution matrix amount always perplexs each side.
Pipe at the bottom of, axil angle is exactly pipeline support central angle, and axil angle at the bottom of pipe is no less than 90 °, generally 90 ° and 120 ° two kinds.
When backfill installed by PCCP pipe, at the bottom of pipe, axil angular convolution matrix amount is mostly important, should form the effective strut angle of pipeline.The effective strut angle of pipeline
In the range of should backfill closely knit, with tube wall be in close contact.Avoid differential settlement, cause being subjected to displacement at pipe joint, becoming
Shape even failure by shear.
At present, at the bottom of PCCP pipe, the construction of axil angle has open arc method and fills out arc method two kinds.
Open arc method is to use first to excavate, reserved 200～300mm protective layers, must not disturbance original state soil layer, take hand excavation
To designing foundation plane, then back-filling in layers, roll axil angle range inner cushion layer material (generally spoil), make course reach rule
After fixed degree of compaction, refinish molding to adapt to the radian of pipe fitting, reach best stress.Band crescent shovel can be used
Bull-dozer is gone over from bed course, drives thereafter arcuate groove.Arc radius should be less than outer diameter tube, re-lays one layer of sand, so that pipe
The contact surface of road and bed course is at the end of compacted lift, and contact is tight between the two, uniform force.
Although this kind of method can ensure axil angular convolution matrix amount at the bottom of pipe, but pipe foot mat elder generation layered rolling, then open arc formed
Axil angle, time-consumingly takes a lot of work, uneconomical, and arc axil angle excavation forms difficulty relatively greatly, with pipeline outside edge contacts still defective tightness, axil
Cutin amount can not be guaranteed.And reserve 200～300mm protective layers, and use hand excavation, time-consuming.
Filling out arc method is first to excavate, reserved 200～300mm protective layers, must not disturbance original state soil layer, take hand excavation to setting
Meter foundation plane.Then, lay loose bed course (generally sand) below at the bottom of pipe and in the range of width 1/2～1/3 pipe diameter,
Pipe laying on loose bed course, after Pipe installing is in place, when axil angular region bed course is backfilling and compacted, together with loose bed course, presses
According to regulation degree of compaction vibrating compacting to form the lower axil angular region of pipe.
Although fill out arc method to eliminate the back-filling in layers of open arc method and roll and the operation such as open arc, but complete owing to filling out arc method axil angle
Being to be formed by loose bed course (generally sand) back-filling in layers compacting, axil angular position is owing to being not easy to mechanical ramming, and compaction quality is very
It is difficult to ensure card, it is also difficult to pipeline is formed effectively support.And the angle requirement at axil angle is relatively big, backfill loose bed course (generally sand)
Amount is relatively big, uneconomical.And reserve 200～300mm protective layers, and use hand excavation, time-consuming.
Summary of the invention
The invention aims to overcome the weak point of above-mentioned background technology, and provide and improve on a kind of subsoil
PCCP installs the construction method of axil angle digging up and filling in quality.
To achieve these goals, the technical scheme is that improving axil angle at the bottom of PCCP pipe on a kind of subsoil opens
Dig the construction method of backfill quality, it is characterised in that it comprises the technical steps that:
Step 1: mechanical equivalent of light excavation pipeline groove, to bottom land, reserves soil layer protective layer, is excavated to design foundation plane 1；
Step 2: with two-wheel vibroroller cmpacting design foundation plane to closely knit after hand fit's leveling；
Step 3: backfill medium coarse sand on design foundation plane again is again closely knit with two-wheel vibroroller cmpacting；
Step 4: install PCCP pipeline on backfill medium coarse sand；
Step 5: fill arc basis in both sides at the bottom of pipe with layered with medium coarse sand, vibratory rammer, vibratory tamper is tamped, and is ensureing pipeline
Next layer of stone, compacting is carried out, until backfill material surface area reaches connecing of two-wheel vibrating roller after axil angle bottom filling is substantial, closely knit
Contacting surface；
Step 6: use two-wheel vibroroller cmpacting to return filling surface to closely knit.
In technique scheme, the thickness of described reserved soil layer protective layer is 200～300mm, utilizes back-hoe bucket to weld
Steel plow is excavated to design foundation plane.Both avoided bottom land original state foundation soil is produced disturbance；Avoid again hand excavation, improve
Work efficiency；The more important thing is and utilize ground undisturbed soil, forming axil angle at the bottom of pipe, axil cutin amount is guaranteed.
In technique scheme, described medium coarse sand modulus of fineness is 2.8～3.2, and particle diameter is 0.5～2mm, and backfill is relatively
Density is not less than 0.65, and compactness is not less than 90%.Meet code requirement.
In technique scheme, when described arc basis is filled, backfill lift height is not more than 100mm.It is beneficial to layering
Compacting, ensures to be backfilling and compacted quality.
Compared with prior art, beneficial effects of the present invention is as follows:
(1) both used mechanical equivalent of light excavation protective layer, and used again machinery to carry out axil angular convolution and fill out, substantially increase axil angle digging up and filling in
Efficiency of construction.Single work surface PCCP pipe installation, by the 12 joints/sky of open arc method, brings up to 20 joints/sky.
(2) take full advantage of subsoil to form axil angle, compared with filling out arc method, reduce the angle at axil angle, saved sand
Bed course backfill amount, the most economical.
(3) improve axil angular convolution matrix amount, axil angular convolution matrix amount 98% is qualified, reduces pipe joint and uneven sinking occurs
Fall, causes the risk of failure by shear accident.
Accompanying drawing explanation
Fig. 1 is existing to fill out axil angular convolution at the bottom of arc method embodiment pipe and fill out shaping schematic view.
Fig. 2 is the structural representation of the specific embodiment of this Fig. 1.
Fig. 3 is excavation shaping schematic view in axil angle at the bottom of embodiment of the present invention pipe.
Fig. 4 is that at the bottom of embodiment of the present invention pipe, axil angular convolution fills out shaping schematic view.
Fig. 5 is the structural representation of the specific embodiment of this Fig. 4.
In figure, 1-designs foundation plane, 2-soil layer protective layer, 3-medium coarse sand, 4-PCCP pipeline, and 5-arc basis, α is at the bottom of pipe
Axil angle.
Detailed description of the invention
Describe the performance of the present invention below in conjunction with the accompanying drawings in detail, but they are not intended that limitation of the invention, only
For example.Make advantages of the present invention more clear and easy to understand by explanation simultaneously.
The present invention is with certain engineering PCCP internal diameter of the pipeline 3800mm, and three pipes are that case study on implementation is carried out in detail with groove mounting arrangements
Describing in detail bright, for other engineering PCCP pipeline different inner diameters, different pipe numbers have directive significance equally with groove mounting arrangements, in conjunction with
The present invention is described further for accompanying drawing.
Understand refering to accompanying drawing: on a kind of subsoil, improve the construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe, its
Being characterised by, it comprises the technical steps that:
Step 1: mechanical equivalent of light excavation pipeline groove, to bottom land, reserves soil layer protective layer 2, is excavated to design foundation plane 1；
Step 2: with two-wheel vibroroller cmpacting design foundation plane 1 bottom land to closely knit after hand fit's leveling；
Step 3: backfill medium coarse sand 3 on base surface again is again closely knit with two-wheel vibroroller cmpacting；
Step 4: install PCCP pipeline 4 on backfill medium coarse sand 3；
Step 5: fill arc basis, both sides 5 at the bottom of pipe with layered with medium coarse sand 3, vibratory rammer, vibratory tamper is tamped, and is ensureing pipe
Next layer of stone, compacting is carried out, until backfill material surface area reaches two-wheel vibrating roller after axil angle, road bottom filling is substantial, closely knit
Work surface；
Step 6: use two-wheel vibrating roller to return filling surface to closely knit.
The thickness of described reserved soil layer protective layer 2 is 200～300mm, utilizes back-hoe bucket welding steel plow to be excavated to set
Meter foundation plane.
Described medium coarse sand 3 modulus of fineness is 2.8～3.2, and particle diameter is 0.5～2mm, and backfill relative density is not less than 0.65,
Compactness is not less than 90%.
When described arc basis 5 is filled, backfill lift height is not more than 100mm.
In Fig. 2, at the bottom of pipe, axil angle α is 120 °.
In Fig. 5, at the bottom of pipe, axil angle α is 90 °, can save Cast-in-situ Piles in Sand-filling.
In order to more clearly illustrate to improve axil angle excavation at the bottom of PCCP pipe on a kind of subsoil of the present invention
Construction method and the existing open arc method of backfill quality and have the advantage that compared with filling out arc method, this several method is entered by staff
Go contrast, its comparing result such as following table:
| Each method compares | Sand bedding course consumption (m3/ joint) | Installation effectiveness (joint/sky) | Up-to-standard rate |
| Open arc method | 2 | 12 | 92% |
| Fill out arc method | 10 | 15 | 88% |
| The inventive method | 4 | 20 | 98% |
As seen from the above table, a kind of subsoil of the present invention improves executing of axil angle digging up and filling in quality at the bottom of PCCP pipe
Work method sand bedding course consumption apparently higher than open arc method and fills out arc method significantly lower than filling out arc method, installation effectiveness and up-to-standard rate.Cause
This, it is more excellent side that a kind of subsoil of the present invention improves the construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe
Method.
Other unaccounted part belongs to prior art.
Claims (4)
1. improve the construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe on a subsoil, it is characterised in that it includes
Following processing step:
Step 1: mechanical equivalent of light excavation pipeline groove, to bottom land, reserves soil layer protective layer (2), is excavated to design foundation plane 1；
Step 2: with two-wheel vibroroller cmpacting design foundation plane (1) to closely knit after hand fit's leveling；
Step 3: backfill medium coarse sand (3) in design foundation plane (1) again is again closely knit with two-wheel vibroroller cmpacting；
Step 4: at the medium coarse sand (3) upper installation PCCP pipeline (4) that backfill densification is real；
Step 5: fill both sides arc basis (5) at the bottom of pipe with layered with medium coarse sand (3), vibratory rammer, vibratory tamper is tamped, and is ensureing pipe
Next layer of stone, compacting is carried out, until backfill material surface area reaches two-wheel vibrating roller after axil angle, road bottom filling is substantial, closely knit
Contact surface；
Step 6: use two-wheel vibroroller cmpacting to return filling surface to close.
Improve PCCP on a kind of subsoil the most according to claim 1 and the construction party of axil angle digging up and filling in quality is installed
Method, it is characterised in that: the thickness of described soil layer protective layer (2) is 200～300mm, utilizes back-hoe bucket welding steel plow excavation
To designing foundation plane (1).
Improve PCCP on a kind of subsoil the most according to claim 1 and 2 and the construction of axil angle digging up and filling in quality is installed
Method, it is characterised in that: described medium coarse sand (3) modulus of fineness is 2.8～3.2, and particle diameter is 0.5～2mm, and backfill relative density is not
Less than 0.65, compactness is not less than 90%.
Improve PCCP on a kind of subsoil the most according to claim 3 and the construction party of axil angle digging up and filling in quality is installed
Method, it is characterised in that: when described arc basis (5) is filled, backfill lift height is not more than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519896.3A CN106193057A (en) | 2016-07-05 | 2016-07-05 | The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519896.3A CN106193057A (en) | 2016-07-05 | 2016-07-05 | The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106193057A true CN106193057A (en) | 2016-12-07 |
Family
ID=57465110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610519896.3A Pending CN106193057A (en) | 2016-07-05 | 2016-07-05 | The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106193057A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354670A (en) * | 2022-08-24 | 2022-11-18 | 山西省水利建筑工程局集团有限公司 | Construction method for pipeline groove axillary angle backfill |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488836A (en) * | 1981-10-14 | 1984-12-18 | Cour Francis R | Method and apparatus for embedding a pipe in a trench in weak ground |
| FR2908793B1 (en) * | 2006-11-17 | 2009-02-13 | Sade Cie Generale De Travaux D | METHOD OF INTERVENTION ON UNDERGROUND CONDUCT |
| CN104089089A (en) * | 2014-07-14 | 2014-10-08 | 中国水利水电第十工程局有限公司 | Pressure backfill type elastic buried pipe construction method |
-
2016
- 2016-07-05 CN CN201610519896.3A patent/CN106193057A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488836A (en) * | 1981-10-14 | 1984-12-18 | Cour Francis R | Method and apparatus for embedding a pipe in a trench in weak ground |
| FR2908793B1 (en) * | 2006-11-17 | 2009-02-13 | Sade Cie Generale De Travaux D | METHOD OF INTERVENTION ON UNDERGROUND CONDUCT |
| CN104089089A (en) * | 2014-07-14 | 2014-10-08 | 中国水利水电第十工程局有限公司 | Pressure backfill type elastic buried pipe construction method |
Non-Patent Citations (1)
| Title |
|---|
| 王晶晶: ""新型给排水管道技术经济比较研究"", 《工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354670A (en) * | 2022-08-24 | 2022-11-18 | 山西省水利建筑工程局集团有限公司 | Construction method for pipeline groove axillary angle backfill |
| CN115354670B (en) * | 2022-08-24 | 2024-06-04 | 山西省水利建筑工程局集团有限公司 | Construction method for backfilling axillary angle of pipeline groove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110306616B (en) | Construction method of sewage pipeline | |
| CN110924961B (en) | Construction method for starting shield tunneling machine to pass through existing station | |
| US20230064296A1 (en) | Water Intake Pipeline Structure Passing Through Soft Foundation Embankment Below Flood Level and Construction Method | |
| CN204059403U (en) | A kind of low embankment existing gas pipeline insulation blocking structure | |
| US11566390B2 (en) | Construction method of reclaiming land from the sea based on basement utilization | |
| CN209039896U (en) | The soft soil roadbed three-dimensional reinforced structure of convolution is knitted in a kind of stake- | |
| CN105274922A (en) | Anti-slide tie-steel pipe pile composite structure for repairing cave-in roadbed and method | |
| CN110656621A (en) | River channel closure system structure and construction method | |
| CN107100179B (en) | Light combined retaining structure and method for treating large-range high-fill slope engineering | |
| CN107881987A (en) | Deep covering layer top panel Rockfill Dam based moisture barrier structure | |
| CN104929142A (en) | Combined cofferdam structure and building construction method thereof | |
| CN111271118B (en) | Drainage structure suitable for reconstruction of karst tunnel bottom structure and construction method thereof | |
| CN110453687B (en) | Protection structure of subway station foundation pit excavation pipeline and construction method | |
| CN106193057A (en) | The construction method of axil angle digging up and filling in quality at the bottom of PCCP pipe is improved on a kind of subsoil | |
| CN110486531B (en) | Pipeline construction method combining artificial pipe jacking and rammed pipe | |
| CN107740355A (en) | A kind of pipe culvert position roadbed construction method | |
| CN218492556U (en) | Roadbed structure is backfilled to road pipe ditch | |
| CN107940102B (en) | Underground raw water pipeline protection construction method | |
| CN109056441A (en) | The soft soil roadbed three-dimensional reinforced structure of convolution and construction method are knitted in stake- | |
| CN107100100A (en) | The corrugated steel pipe shaping culvert construction method of housing type joint connection | |
| CN109742715B (en) | Arrangement structure of electric power pipe trench after transition and modification and electric power pipe trench transition and modification method | |
| CN107130530A (en) | The construction method of burst assembling type steel corrugated pipe forming culvert | |
| CN111519603A (en) | Device for comprehensively treating uneven settlement of underground buried pipe of soft soil foundation by combination of replacement and filling and grouting and construction method | |
| CN220644198U (en) | Sand soft foundation road engineering pile foundation reinforced structure | |
| CN217583407U (en) | Underground embedding structure of natural gas pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |
|
| WD01 | Invention patent application deemed withdrawn after publication |