CN105135056A - Pressure test back supporting device for large-diameter water supply and drainage pipeline - Google Patents
Pressure test back supporting device for large-diameter water supply and drainage pipeline Download PDFInfo
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- CN105135056A CN105135056A CN201510334175.0A CN201510334175A CN105135056A CN 105135056 A CN105135056 A CN 105135056A CN 201510334175 A CN201510334175 A CN 201510334175A CN 105135056 A CN105135056 A CN 105135056A
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- steel sheet
- sheet pile
- steel plate
- force transmission
- pressure test
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- General Health & Medical Sciences (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a pressure test back supporting device for a large-diameter water supply and drainage pipeline. The pressure test back supporting device which is large in bearing capacity, stable, reliable, easy to construct, environmentally friendly and capable of achieving energy saving is manufactured through a steel plate pile, and the problems that a concrete pressure test supporting pier of a large-diameter water supply and drainage pipeline is complex in construction, high in manufacturing cost and long in construction period, and materials are wasted are solved. The pressure test back supporting device is composed of a steel plate pile, a waist rail and force transmission rods. A single-row or double-row U-shaped steel plate pile is adopted as the steel plate pile, and the depth of the part, buried in the ground, of the steel plate pile is calculated according to project needs. H-shaped structural steel is adopted as the waist rail and arranged on the steel plate pile in the horizontal direction. The force transmission rods are eight pieces of structural steel with the hollow sections and include four straight rods and four inclined rods. A set of force transmission components are formed by connecting each straight rod and the corresponding inclined rod with a certain angle, wherein the angle ranges from 30 degrees to 45 degrees. The four sets of the force transmission components are arranged between a pipe plug and the waist beam in an up-and-down and left-and-right symmetric manner.
Description
Technical field
The present invention relates to pipeline pressure test back support field, specifically, is a kind of pressure testing back support device for heavy caliber water supply and sewerage pipeline.
Background technique
Supplying drainage is generally to be no more than the pipeline of 1 kilometer as a pressure testing pipeline section.During pressure testing, first pipeline section two ends pipe plug is sealed, then pressurization of washing by water, pipe plug will be subject to the extrapolability of overpressure water generation.For preventing interface from getting loose, needing, support is set extrapolability is passed to the soil body, the support system common equilibrium extrapolability formed by back support and surrounding soil.
Back support conventional in current engineering generally adopts concrete for making, is called buttress.But there is following narrow limitation: for heavy caliber water supply and sewerage pipeline, the consumption of concrete buttress is large, cost is high and construct loaded down with trivial details; Concrete buttress needs the regular hour just can reach design strength, affects the duration; Pressure testing concrete buttress belongs to provisional buttress, needs to remove after pressure testing completes, large to large diameter pipeline concrete buttress volume, not only removes work trouble, and waste material.Adopt self-anchored type interface at pipeline pressure test end in minority water supply and sewage work in addition, but which needs speciality accessory and manufacture cost is high, interface easily comes off and poor stability.
Steel sheet pile structure has that bearing capacity is strong, good integrity, reusable, the advantage such as simple of constructing, the present invention is directed to current pipeline pressure test back support Problems existing, a kind of bearing capacity is strong, reliable and stable, construction is simple, the support device of environmental protection and saving to utilize steel sheet pile, waist rail and dowel bar to invent.
Summary of the invention
The present invention be directed to current heavy caliber water supply and sewerage pipeline pressure testing back support Problems existing, a kind of bearing capacity is strong, reliable and stable, construction is simple, the pipeline pressure test back support device of environmental protection and saving to utilize steel sheet pile to produce.
The present invention is achieved in the following ways: a kind of pressure testing back support device for heavy caliber water supply and sewerage pipeline, by steel sheet pile, waist rail and dowel bar three part form.Described steel sheet pile adopts single or double U-shaped steel sheet pile, calculates steel sheet pile embedded depth according to requirement of engineering.Described waist rail adopts H profile steel, is arranged in the horizontal direction on steel sheet pile.Described dowel bar is 8 hollow section shaped steel, comprise 4 straight-bars and 4 braces, respectively 1 straight-bar and 1 brace are connected to form 1 group of Force transmission parts at a certain angle, wherein said angular range is 30 °-45 °, and 4 groups of Force transmission partses of gained are arranged between pipe plug and waist rail by mode symmetrical up and down.In this support device, pipe plug extrapolability P is delivered to waist rail through dowel bar, then is delivered to steel sheet pile by waist rail, is finally delivered to the soil body, and extrapolability P is finally by earth pressure balance.This support be a kind of construct simple, economize on resources and heavy caliber water supply and sewerage pipeline pressure testing back support device that structural type is stable.
Compared with existing conventional concrete buttress, beneficial effect of the present invention is:
(1) this support device can adapt to multiple different geological condition.
(2) installation and removal of this support device is all very convenient, the duration comparatively concrete buttress obviously shorten.
(3) this support device good integrity, reliability are high, pipe plug extrapolability evenly can be passed to the back soil body.
(4) steel sheet pile in this support device, waist rail, dowel bar all can reuse, and environmental protection and saving, reduction engineering cost, have a extensive future.
Accompanying drawing explanation
Fig. 1 is the present invention---a kind of schematic diagram of the pressure testing back support device for heavy caliber water supply and sewerage pipeline.
Fig. 2 is Fig. 1 I-I sectional drawing.
Fig. 3 is dowel bar sectional drawing.
Number in the figure illustrates: 1-steel sheet pile; 2-waist rail; 3-straight-bar; 4-brace; 5-pipe plug.
Embodiment
Clearly understand for making technological scheme of the present invention, object and advantage, below in conjunction with certain Practical Project, the present invention is described in further detail, the present invention with certain Practical Project for specific embodiment is only for explaining the present invention, not as a limitation of the invention.
The supporting water conveyance pipeline project of certain interflow water pump station, engineering caliber 1600mm, pipeline working pressure 0.6MPa, test pressure 0.9MPa, act on extrapolability reference value P=1808.64kN on pipe plug.The hydrostatic test is carried out to construction pressure testing pipeline section (850 meters), during pressure testing, pipeline section two ends steel pipe plug is sealed.In order to balance tube inner high voltage water is to the extrapolability of pipe plug, need to arrange back support device to pipe plug.
According to project data, the pressure testing back support device of steel sheet pile to this large-caliber drainage pipeline is utilized to carry out design as follows:
(1) design of dowel bar: the effect of dowel bar is that pipe plug extrapolability is passed to waist rail, consider safety of structure requirement, in this support device, dowel bar is arranged between pipe plug and waist rail evenly, symmetrically.This embodiment adopts 8 hollow section round steel pipes (diameter 159mm, wall thickness 6mm) as dowel bar, and comprising 4 straight-bars and 4 braces, straight-bar and brace length are respectively 1.5m and 1.92m.Respectively 1 straight-bar and 1 brace are connected to form 1 group of Force transmission parts with 38 °.Then 4 groups of Force transmission partses are arranged between pipe plug and waist rail by mode symmetrical up and down.In 4 groups of Force transmission partses, level interval and the vertical spacing of adjacent straight-bar are 0.8m.Calculate straight-bar and brace axle power is respectively 56.07kN, 507.82kN, all meet strength and stability requirement through checking computations straight-bar and brace.Dowel bar sectional drawing is as Fig. 3.
(2) design of waist rail: waist beam action is distributed on steel sheet pile by the single force of dowel bar transmission, the waist rail of this embodiment arranges 2, is arranged on steel sheet pile in the horizontal direction.Waist rail selects HW300 × 300 × 10 × 15 shaped steel, long 5.6m, and the even distributed force of every bar waist rail transmission is as calculated 161.49kN/m, meets strength and deformation requirement through checking computations waist rail.
(3) design of steel sheet pile: steel sheet pile, as cantilever type building enclosure, is equivalent to keep off native supporting structure, and is equivalent to foundation pit supporting construction before arranging dowel bar and waist rail in pipeline pressure test process.Therefore need to calculate respectively the embedded depth of both of these case, and get higher value.When steel sheet pile is as supporting structure, meet static balance condition according to effect horizontal force thereon and calculate embedded depth, wherein horizontal force comprises pipe plug extrapolability and reaches the even distributed force of waist rail and the active earth pressure of steel sheet pile both sides and passive earth pressure (adopting Rankine's earth pressure theory to calculate active earth pressure and passive earth pressure).And steel sheet pile as foundation pit supporting construction time, consider the active earth pressure of steel sheet pile both sides and passive earth pressure, then square is got to stake end meet moment equilibrium condition and calculate embedded depth.Through calculating, finally determine to select single SP-III steel sheet pile, the long 9m of stake, embedded depth 5.8m, set width 5.6m, meets strength and deformation requirement through checking computations steel sheet pile.
As shown in Figure 1, Figure 2 and Figure 3, the present invention---a kind of pressure testing back support device for heavy caliber water supply and sewerage pipeline.The concrete installation steps of this support device are: the trial trench first digging a 600mm × 1500mm along steel sheet pile distribution arrangement, verify underground obstacle and pipeline position.Next is squeezed into steel sheet pile and excavates working pit, and is arranged in the horizontal direction on steel sheet pile by waist rail.Respectively 1 straight-bar and 1 brace are connected to form 1 group of Force transmission parts at a certain angle again, finally 4 of gained groups of Force transmission partses are arranged between pipe plug and waist rail by mode symmetrical up and down.Finally carrying out feedwater pressure testing, is dismountable dowel bar, waist rail after pressure testing completes, and backfilling working transfers to steel sheet pile behind hole.12mm is only at the actual maximum displacement value of pressure testing process pipe plug, much smaller than test pipe plug limit displacement value 50mm, so the support device of this embodiment is safe and reliable through measuring.
Above-described embodiment; technological scheme of the present invention, object and advantage are further described; but the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; all within principle of the present invention and claim; any amendment of making, improvement and equal replacement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the pressure testing back support device for heavy caliber water supply and sewerage pipeline, it is characterized in that: by steel sheet pile (1), waist rail (2) and dowel bar three part composition, described steel sheet pile (1) adopts U-shaped steel sheet pile, described waist rail (2) is arranged on steel sheet pile (1) in the horizontal direction, described dowel bar is 8 hollow section shaped steel, comprise 4 straight-bars (3) and 4 braces (4), respectively 1 straight-bar (3) and 1 brace (4) are connected to form 1 group of Force transmission parts at a certain angle, wherein said angular range is 30 °-45 °, 4 groups of Force transmission partses of gained are arranged between pipe plug (5) and waist rail (2) by mode symmetrical up and down.
2. support device according to claim 1, is characterized in that: described steel sheet pile (1) adopts single or double U-shaped steel sheet pile.
3. support device according to claim 1, is characterized in that: described waist rail (2) is H profile steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510334175.0A CN105135056A (en) | 2015-06-09 | 2015-06-09 | Pressure test back supporting device for large-diameter water supply and drainage pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510334175.0A CN105135056A (en) | 2015-06-09 | 2015-06-09 | Pressure test back supporting device for large-diameter water supply and drainage pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105135056A true CN105135056A (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510334175.0A Pending CN105135056A (en) | 2015-06-09 | 2015-06-09 | Pressure test back supporting device for large-diameter water supply and drainage pipeline |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29701371U1 (en) * | 1997-01-28 | 1997-05-15 | Kalberg Friedel Paul | Device for closing a tube with an end fitting |
| CN201955199U (en) * | 2010-11-24 | 2011-08-31 | 中建八局第三建设有限公司 | Pressure testing device for tail end of large-caliber water pipe |
| CN202471500U (en) * | 2011-12-14 | 2012-10-03 | 中建五局第三建设有限公司 | Pipeline pressure testing supporting device |
| CN203162404U (en) * | 2013-01-25 | 2013-08-28 | 中国华冶科工集团有限公司 | Cooling water pipe pressure test connector |
| CN203732375U (en) * | 2014-02-28 | 2014-07-23 | 上海江南长兴重工有限责任公司 | Tool for hydraulic test for stern shaft tube |
-
2015
- 2015-06-09 CN CN201510334175.0A patent/CN105135056A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29701371U1 (en) * | 1997-01-28 | 1997-05-15 | Kalberg Friedel Paul | Device for closing a tube with an end fitting |
| CN201955199U (en) * | 2010-11-24 | 2011-08-31 | 中建八局第三建设有限公司 | Pressure testing device for tail end of large-caliber water pipe |
| CN202471500U (en) * | 2011-12-14 | 2012-10-03 | 中建五局第三建设有限公司 | Pipeline pressure testing supporting device |
| CN203162404U (en) * | 2013-01-25 | 2013-08-28 | 中国华冶科工集团有限公司 | Cooling water pipe pressure test connector |
| CN203732375U (en) * | 2014-02-28 | 2014-07-23 | 上海江南长兴重工有限责任公司 | Tool for hydraulic test for stern shaft tube |
Non-Patent Citations (1)
| Title |
|---|
| 张宝军等: "大口径钢筒预应力混凝土管的中间试压技术", 《中国给水排水》 * |
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Application publication date: 20151209 |
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