CN104895174A - Construction method of large-diameter rain sewage pipeline assembling type component structure - Google Patents
Construction method of large-diameter rain sewage pipeline assembling type component structure Download PDFInfo
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- CN104895174A CN104895174A CN201510297169.2A CN201510297169A CN104895174A CN 104895174 A CN104895174 A CN 104895174A CN 201510297169 A CN201510297169 A CN 201510297169A CN 104895174 A CN104895174 A CN 104895174A
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Abstract
The invention relates to a large-diameter rain sewage pipeline assembling type component structure. The large-diameter rain sewage pipeline assembling type component structure is characterized in that a shallow curing cement layer is disposed at the bottom of the groove of a pipeline, a prefabricated pipeline base is disposed on the upper portion of the shallow curing cement layer, the pipeline base is provided with hoisting holes, rear grouting holes, form board grooves and positioning fasteners, the pipeline is supported on the pipeline base, rear grouting sealing bodies are formed in the gaps between the pipeline and the pipeline base by grouting through the rear grouting holes, separated annular positioning bands are evenly disposed on the pipeline, two ends of the separated annular positioning bands are respectively connected with the positioning fasteners on two sides of the pipeline base, a concrete backfill layer is disposed on the periphery of the pipeline, and gravel backfill layers are disposed on two sides of the pipeline. The large-diameter rain sewage pipeline assembling type component structure has the advantages that the prefabricated pipeline base is used, pipeline mounting integrity and stability are effectively enhanced by a series of reinforcing measures, and the structure is convenient in hoisting and good in economic and technological benefits.
Description
Technical field
The present invention relates to a kind of construction method of heavy caliber rain sewage conduct assembling modular construction.Belong to municipal engineering field, be applicable to the burial and construction of heavy caliber rain sewage conduct.
Background technology
Municipal administration rain sewage conduct as infrastructure important in cities and towns, with the daily life of resident and work relationship close.At present in municipal rain sewage conduct construction, rain soil pipe is layed in the both sides of town road more, site work face is less, after causing tubing hoisted in position, hanging belt is not easy to extract, the globality of pipeline is poor, steadiness is low, and easily causes pipe to offset, and can not ensure the straight cis degree of Pipe installing, twice basic concrete construction cycle is long simultaneously, and pipeline is generally on the low side with the bonding strength on basis.
Now existing multiple assembling pipe support structure, and good project benefit is all achieved under suitable operating mode, but remain and improve space, be mainly reflected in: (1) does not process ground, directly carry out pipe support installation, cause bearing capacity of foundation soil deficiency to occur differential settlement; (2) portion of standoff structure does not consider conduit section size, has constructed easily between pipeline and bearing, to form larger space afterwards, and support strength is on the low side; (3) portion of standoff structure does not consider connectivity problem between bearing space grouting behind shaft or drift lining, split-type bearing, and the entirety affecting pipeline and bearing is stressed; (4) portion of standoff structure lifting pipeline is completed after nothing add epistasis and connect measure, pipe shaft cracky etc. in generation settlement after construction situation.
Given this, produce technological difficulties and the problems such as differential settlement drawing crack after, pipeliner low, not enough with pedestal bonding strength for overall steadiness after the lifting construction difficulty existed in the construction of traditional heavy caliber rain sewage conduct, Pipe installing, need the rain sewage conduct assembling modular construction that a kind of lifting construction of invention is easy, overall structure good stability, support strength are high, economic benefit is excellent at present badly.
Heavy caliber rain sewage conduct assembling modular construction of the present invention is adopted prefabricated pipeline pedestal and is effectively enhanced globality and the stability of Pipe installing by a series of reinforcement measure, and structure hoisting is convenient, has good economic technology benefit.
Summary of the invention
The object of the present invention is to provide the construction of the heavy caliber rain sewage conduct assembling modular construction that a kind of efficiency of construction is high, lifting pipeline is simple, overall steadiness is good, differential settlement is little.
For realizing above-mentioned technical purpose, present invention employs following technical scheme:
The construction method of heavy caliber rain sewage conduct assembling modular construction, it is characterized in that, shallow-layer curing cement soil layer is set bottom pipeline groove, shallow-layer curing cement soil layer top arranges prefabricated pipeline pedestal, pipeline pedestal is provided with hole for hoist, grouting behind shaft or drift lining hole, template groove and locating button, pipeline props up to be located on pipeline pedestal, in the space of pipeline and pipeline pedestal, grouting behind shaft or drift lining obturator is formed by grouting behind shaft or drift lining hole mud jacking, and separate type hoop positioning belt is evenly set on pipeline, separate type hoop positioning belt two ends are connected with the locating button of pipeline pedestal both sides respectively, pipeline arranges concrete backfill layer, both sides arrange gravel backfill layer
The main construction sequence of described construction method is as follows:
1) preparation of construction: according to design drawing, process job site, draw construction outline line, determine bench mark absolute altitude, position prefabricated pipeline pedestal, construction material, machinery, personnel are in place;
2) tube seat excavation: determine excavation width according to designing slot bottom width and cutting depth and putting slope gradient calculating, adopt reverse shovel grab retrusive excavation, and carry out with inverse water pipe gradient direction;
3) flat base, the construction of cement solidification layer: after tube seat has excavated, absolute altitude at the bottom of pipe is measured, and tamps bottom soil body, then adopt pre-mixing light weight concrete construction to carry out backfill to pave;
4) pipeline pedestal lifting: spill medium-sand seam curing cement soil layer top paving before lifting, adopts boom hoisting to be longitudinally equidistantly laid in tube seat by prefabricated pipeline pedestal;
5) Pipe installing: manage under adopting hand fit's machinery, according to designing requirement, rain sewage conduct is steadily mounted on pipeline pedestal, separate type hoop positioning belt is set after installation qualification, firm pipe shaft;
6) slip casting obturator construction: the cement mortar meeting match ratio requirement is carried out mud jacking by grouting behind shaft or drift lining hole, the space between fill pipe and pipeline pedestal by cement mortar pump;
7) concrete backfill construction: insert template in the template groove of prefabricated pipeline pedestal both sides, adopts at two ends same template to enclose simultaneously, carries out concreting backfill, stripping after concrete initial set;
Gravel backfill construction: at both sides placement in layers gravel after the acceptance(check) of concrete backfill layer, every layer thickness is less than 150mm, and compaction treatment.
Described pipeline groove excavated section can be arranged to inverted trapezoidal or rectangle.
Described prefabricated pipeline pedestal upper surface is provided with circular arc notch, notch radius is identical with pipe external surface radius, circular arc notch bilateral symmetry and set gradually compartment L-type grouting behind shaft or drift lining hole and template groove from inside to outside, the base top surface spaced set locating button between L-type grouting behind shaft or drift lining hole and template groove.
When described prefabricated pipeline pedestal volume is larger, can be set to symmetric double fraction structure, double-division type pipeline pedestal link reserves screw limiting hole, and the junction steel plate being welded with positioning screw by bottom connects into entirety.
Described hole for hoist is horizontally placed between adjacent two grouting behind shaft or drift lining holes, and through template groove and circular arc notch.
Described separate type hoop positioning belt is along the longitudinal spaced set of pipeline, and two ends are connected with the locating button of pipeline pedestal both sides respectively.
Described concrete backfill layer is laterally located between the template groove of pipeline pedestal both sides, wraps rain sewage conduct completely, and arrange gravel backfill layer between concrete backfill layer and groove cell wall.
The present invention has following feature and beneficial effect:
(1) the present invention arranges shallow-layer curing cement soil layer bottom pipeline groove, can effectively improve bearing capacity of foundation soil and stability, reduces the posterior settlement of rain sewage conduct.
(2) pipeline pedestal can select monolithic or symmetric double fraction according to actual condition, pedestal upper surface is prefabricated into circular arc notch according to pipe radius, can be closely connected with pipeline, both integrally-built stability can be strengthened, the difficulty of fixing quality control can be reduced again, pedestal is from establishing template groove and hole for hoist simultaneously, can simplify lifting, formwork construction, accelerating construction progress.
(3) the present invention's slip casting in the space of prefabricated pipeline pedestal and rain sewage conduct forms grouting behind shaft or drift lining obturator, contributes to the installation globality strengthening pipeline and pedestal.
(4) after lifting pipeline completes, at the equidistant erection loop of pipe shaft to positioning belt, can effectively prevent rain sewage conduct from offseting during differential settlement in follow-up backfill construction and after work.
Accompanying drawing explanation
Fig. 1 is heavy caliber rain sewage conduct assembling modular construction schematic diagram of the present invention;
Fig. 2 is symmetric double fraction pipeline pedestal connection diagram in the present invention;
Fig. 3 is concrete backfill formwork schematic diagram in the present invention;
In figure: 1-pipe alley cell wall, 2-shallow-layer curing cement soil layer, 3-pipeline pedestal plays pad part, 4-pipeline pedestal stable part, 5-template groove, 6-L type grouting behind shaft or drift lining hole, 7-screw limiting hole, 8-junction steel plate, 9-grouting behind shaft or drift lining obturator, 10-rain sewage conduct, 11-locating button, 12-hoop positioning belt, 13-concrete backfill layer, 14-gravel backfill layer, 15-template, 16-hole for hoist.
Detailed description of the invention
The construction technical requirement of tube seat excavation in present embodiment, solidified earth construction process requirement, cement injection proportioning etc. repeats no more, and emphasis sets forth the embodiment of the heavy caliber rain sewage conduct sewage conduct assembling modular construction construction related to of the present invention.
Fig. 1 is heavy caliber rain sewage conduct assembling modular construction schematic diagram of the present invention, and Fig. 2 is symmetric double fraction pipeline pedestal connection diagram in the present invention, and Fig. 3 is concrete backfill formwork schematic diagram in the present invention.With reference to the heavy caliber rain sewage conduct sewage conduct assembling modular construction shown in Fig. 1, pad part 3 is played primarily of pipeline pedestal, pipeline pedestal stable part 4, grouting behind shaft or drift lining obturator 9, rain sewage conduct 10, composition such as hoop positioning belt 12 grade, embodiment is described for D=1000mm rain sewage conduct 10:
Adopt reverse shovel grab retrusive excavation tube seat, excavation width at the bottom of tube seat is 1200mm, and cutting depth is 1400mm, and it is 2.75 that pipe alley cell wall 1 puts the slope gradient.After tube seat has excavated, compacting bottom soil body, and formwork erection is built, and 100mm is thick, strength grade is the light weight concrete construction of LC5.0, forms shallow-layer curing cement soil layer 2.
Pipeline pedestal is reinforced concrete structure, and Separated type pipe base bottom surface is wide is 600mm, and it is 100mm that pipeline pedestal plays pad part 3 height, arranges the bolt spacing hole 7 of diameter 16mm, long 25mm apart from side 50mm place; Pipeline pedestal stable part 4 is highly 500mm, the wide 200mm of end face, in the middle of end face, a locating button 11 is set every 1000mm, and the L-type grouting behind shaft or drift lining hole 6 that aperture is 20mm, specification is 150 × 120mm is set apart from arc-shaped side edges 30mm place, L-type grouting behind shaft or drift lining hole 6 arranges together every 2500mm, and the hole for hoist 16 of diameter 20mm is set between adjacent twice L-type grouting behind shaft or drift lining hole 6, the template groove 5 of wide 30mm, dark 300mm is set apart from outer side edges 50mm place simultaneously.
Before pipeline pedestal is installed, the medium-sand seam of thick 150mm is spilt shallow-layer curing cement soil layer 2 top paving, adopt again boom hoisting by prefabricated pipeline pedestal longitudinally proportional spacing be laid in tube seat, then junction steel plate 8 is installed, and the connecting screw rod of junction steel plate 8 bottom insertion pipeline pedestal is risen in the screw limiting hole 7 of pad part 3.
Rain sewage conduct 10 is HDPE pipe, manages under adopting hand fit machinery, installs after the assay was approved, in time at pipe shaft erection loop to positioning belt 12, hoop positioning belt 12 two is connected with the locating button 11 at two ends, left and right on Separated type pipe pedestal successively.After rain sewage conduct 10 installation in position, by cement mortar pump, the cement mortar meeting match ratio requirement is carried out mud jacking through L-type grouting behind shaft or drift lining hole 6, fill the space between rain sewage conduct 10 and pipeline pedestal.
After rain sewage conduct 10 installation, template 15 is inserted in the template groove 5 of two side ducts pedestal stable part 4, template 15 adopts wooden form, thickness and template groove 5 width are all 30mm, adopt the template 15 of identical material, specification to enclose at rain sewage conduct 10 two ends simultaneously, adopt grade strength to be that the concrete of C30 carries out backfill and builds again, stripping 15 after concrete initial set, forms concrete backfill layer 13.
At both sides placement in layers gravel after concrete backfill layer 13 acceptance(check), every layer thickness is less than 150mm, and compaction treatment, form gravel backfill layer 14.
The construction method key step of heavy caliber rain sewage conduct assembling modular construction is as follows:
1) preparation of construction: according to design drawing, process job site, draw construction outline line, determine bench mark absolute altitude, position prefabricated pipeline pedestal, construction material, machinery, personnel are in place.
2) tube seat excavation: determine excavation width according to designing slot bottom width and cutting depth and putting slope gradient calculating, adopt reverse shovel grab retrusive excavation, and carry out with inverse water pipe gradient direction.
3) flat base, the construction of cement solidification layer: after tube seat has excavated, absolute altitude at the bottom of pipe is measured, and tamps bottom soil body, then adopt pre-mixing light weight concrete construction to carry out backfill to pave.
4) pipeline pedestal lifting: spill medium-sand seam curing cement soil layer top paving before lifting, adopt boom hoisting by prefabricated pipeline pedestal longitudinally proportional spacing be laid in tube seat, when pipeline pedestal is symmetric double fraction, should according to pipeline location, symmetrical laying pipeline pedestal, and in time junction steel plate 8 is installed.
5) Pipe installing: manage under adopting hand fit's machinery, according to designing requirement, rain sewage conduct 10 is steadily mounted on pipeline pedestal, separate type hoop positioning belt 12 is set after installation qualification in time, firm pipe shaft.
6) slip casting obturator construction: the cement mortar meeting match ratio requirement is carried out mud jacking by grouting behind shaft or drift lining hole 6, the space between fill pipe and pipeline pedestal by cement mortar pump.
7) concrete backfill construction: insert template 15 in the template groove 5 of prefabricated pipeline base both sides, adopts at two ends same template 15 to enclose simultaneously, carries out concreting backfill, stripping 15 after concrete initial set.
8) gravel backfill construction: at both sides placement in layers gravel after concrete backfill layer 13 acceptance(check), every layer thickness is less than 150mm, and compaction treatment.
Claims (7)
1. the construction method of heavy caliber rain sewage conduct assembling modular construction, it is characterized in that, shallow-layer curing cement soil layer is set bottom pipeline groove, shallow-layer curing cement soil layer top arranges prefabricated pipeline pedestal, pipeline pedestal is provided with hole for hoist, grouting behind shaft or drift lining hole, template groove and locating button, pipeline props up to be located on pipeline pedestal, in the space of pipeline and pipeline pedestal, grouting behind shaft or drift lining obturator is formed by grouting behind shaft or drift lining hole mud jacking, and separate type hoop positioning belt is evenly set on pipeline, separate type hoop positioning belt two ends are connected with the locating button of pipeline pedestal both sides respectively, pipeline arranges concrete backfill layer, both sides arrange gravel backfill layer,
The main construction sequence of described construction method is as follows:
1) preparation of construction: according to design drawing, process job site, draw construction outline line, determine bench mark absolute altitude, position prefabricated pipeline pedestal, construction material, machinery, personnel are in place;
2) tube seat excavation: determine excavation width according to designing slot bottom width and cutting depth and putting slope gradient calculating, adopt reverse shovel grab retrusive excavation, and carry out with inverse water pipe gradient direction;
3) flat base, the construction of cement solidification layer: after tube seat has excavated, absolute altitude at the bottom of pipe is measured, and tamps bottom soil body, then adopt pre-mixing light weight concrete construction to carry out backfill to pave;
4) pipeline pedestal lifting: spill medium-sand seam curing cement soil layer top paving before lifting, adopts boom hoisting to be longitudinally equidistantly laid in tube seat by prefabricated pipeline pedestal;
5) Pipe installing: manage under adopting hand fit's machinery, according to designing requirement, rain sewage conduct is steadily mounted on pipeline pedestal, separate type hoop positioning belt is set after installation qualification, firm pipe shaft;
6) slip casting obturator construction: the cement mortar meeting match ratio requirement is carried out mud jacking by grouting behind shaft or drift lining hole, the space between fill pipe and pipeline pedestal by cement mortar pump;
7) concrete backfill construction: insert template in the template groove of prefabricated pipeline pedestal both sides, adopts at two ends same template to enclose simultaneously, carries out concreting backfill, stripping after concrete initial set;
8) gravel backfill construction: at both sides placement in layers gravel after the acceptance(check) of concrete backfill layer, every layer thickness is less than 150mm, and compaction treatment.
2. construction method according to claim 1, is characterized in that described pipeline groove excavated section is inverted trapezoidal or rectangle.
3. construction method according to claim 1, it is characterized in that described prefabricated pipeline pedestal upper surface is provided with circular arc notch, notch radius is identical with pipe external surface radius, circular arc notch bilateral symmetry and set gradually compartment L-type grouting behind shaft or drift lining hole and template groove from inside to outside, the base top surface spaced set locating button between L-type grouting behind shaft or drift lining hole and template groove.
4. construction method according to claim 1, when it is characterized in that described prefabricated pipeline pedestal volume is larger, be set to symmetric double fraction structure, double-division type pipeline pedestal link reserves screw limiting hole, and the junction steel plate being welded with positioning screw by bottom connects into entirety.
5. construction method according to claim 1, is characterized in that described hole for hoist is horizontally placed between adjacent two grouting behind shaft or drift lining holes, and through template groove and circular arc notch.
6. construction method according to claim 1, is characterized in that described separate type hoop positioning belt is along the longitudinal spaced set of pipeline.
7. construction method according to claim 1, is characterized in that described concrete backfill layer is laterally located between the template groove of pipeline pedestal both sides, wraps rain sewage conduct completely, and arrange gravel backfill layer between concrete backfill layer and groove cell wall.
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| CN115111434B (en) * | 2022-08-30 | 2022-11-15 | 天津建设发展集团有限公司 | Construction method of underground pipeline |
| CN115450229A (en) * | 2022-08-31 | 2022-12-09 | 上海城建市政工程（集团）有限公司 | Pipeline groove excavation backfill construction method based on in-situ solidification of retaining wall slurry |
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