CN101737055B - Combined type air pressure balance tool pipe - Google Patents
Combined type air pressure balance tool pipe Download PDFInfo
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- CN101737055B CN101737055B CN2008102028129A CN200810202812A CN101737055B CN 101737055 B CN101737055 B CN 101737055B CN 2008102028129 A CN2008102028129 A CN 2008102028129A CN 200810202812 A CN200810202812 A CN 200810202812A CN 101737055 B CN101737055 B CN 101737055B
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Abstract
The invention relates to a combined type air pressure balance tool tube, comprising steel tubes and a hydro cylinder; each two steel tubes are connected by eight hydro cylinders in four groups; the tool tube is divided into an excavation cabin, an operation cabin, a decompression cabin and a material cabin in sequence; each two cabins are separated by a steel plate seal; a water tight sluice door is arranged in the center of the separated steel plate; the excavation cabin, the operation cabin, the decompression cabin and the material cabin are connected with a full air pressure construction life breath air safeguard system. The tool tube has the functions of full air pressure, local air pressure, error correcting, mudjacking, plugging and blasting stratum.
Description
Technical field
The present invention relates to the push pipe in a kind of building operations, especially a kind of tool pipe that was used for seawater pipe project to be continued.
Background technology
Shantou City's second is crossed seawater pipe project to be continued, is positioned at upstream, Transbay Bridge, Haikou, PORT OF SHANTOU, and pipeline section total length 2080m adopts construction by pipeline jacking method, adopts the DN2000 steel pipe, and thickness of steel pipe 22mm, pipeline center's absolute altitude are-23.25m (pearl base).
The 1200m push pipe is positioned at mud and silt clay layer on the south the main channel of bay, and this layer soil is saturated, stream is moulded, based on mud, mix a small amount of flour sand and shell, mud and silt soil strata are high-compressibility, and it is fixed that low-intensity is owed, high sensitivity weak soil, bearing capacity are very low, the foundation soil poor stability.
At distance active well 110m～140m place, push pipe need pass through Huaneng Group power plant ashpit piece rock-block field dike.Piece rock-block field dike Main Ingredients and Appearance is hard middle weathering granite block, rubble, and the pore filling thing is medium coarse sand and rubble, and the sillar piece directly is generally 50cm, up 1.80m.
Distance active well 647m～696m place (being positioned at the bay), push pipe need pass through middle weathering sial, rock: a greyish white yellow-white, inequigranular texture, massive structure, based on feldspar, inferior is quartzy, contains a small amount of melanocratic mineral, medium weathering, joints development, saturated single shaft resistance to compression 20～35Mpa, f coefficient 2.5～3.5.Find that simultaneously push pipe has the bigger boulder of volume along the line.
The 800m push pipe is positioned at mud matter flour sand layer to the north of the main channel of bay, and this layer soil is saturated, pine 6 looses, and based on flour sand, contains about 10% mud and a small amount of shell.Before and after distance active well 1500m, run into the medium-sand seam that contains artesian water.
In sum, mainly there are Three Difficult Issues in this engineering jacking construction:
1, push pipe need pass through the loose block stone layer of sea wall
2, weathering sial during push pipe need pass through
3, push pipe is met medium-sand seam
Wherein push pipe passes through piece rock-block field dike and push pipe passes through the rock stratum, does not also have similar construction tool pipe and the experience can reference at home.This engineering push pipe is jacking in softer mud and mud matter flour sand layer mainly, but has run into loose stone obstruction, and has run into hard middle decomposed granite, also need pass through the medium-sand seam that contains artesian water, and engineering geology presents sudden change, and is very complicated.Thereby the tool pipe of various soil layers constructions more than must selecting to adapt to.
If select for use earth pressure balance tool pipe or mud and water balance tool pipe, push pipe can't pass through piece rock-block field dike and middle weathered rock formation.If select for use full section hobboing cutter cutting element pipe, the type tool pipe to be not suitable for weak soil layer, local rock formation section and the construction of chance boulder, and cost is higher.If select the opened type tool pipe for use, when push pipe passes through 2000m seabed and medium-sand seam, can't keep the front soil stabilization, be prone to the landslide phenomenon, particularly containing the medium-sand seam of artesian water, can't guarantee operating personnel's safety.
Summary of the invention
The present invention will provide a kind of combined type air pressure balance tool pipe, and this tool pipe has full air pressure, partial pressure, correction, mud jacking, shutoff, explosion rock stratum function.
For achieving the above object, the technical solution used in the present invention is: a kind of combined type air pressure balance tool pipe, comprise steel pipe, oil cylinder, by four groups of totally eight oil cylinders connections, entire tool pipe inside is divided into excavation cabin, operational window, decompression chamber, material cabin four parts successively, uses the steel plate seal isolation between cabin and the cabin between per two sections steel pipes, isolate steel plate central authorities establish water-tight sluice door one, and excavation cabin, operational window, decompression chamber, material cabin are connected with life-support systems.
Operational window is provided with plastron, and observation port, illuminating lamp and ball hydraulic giant are installed on the plastron; The tool pipe periphery is provided with eight pre-grouting pipes; The tool pipe excavation is provided with eight breast boardss in the storehouse; Gather and arrange 18 ductule holes in the tool pipe top; Tool pipe is three pressure release correction valves of arbitrary layout and high pressure mud flushing tube up and down.
The invention has the beneficial effects as follows:
1. this tool pipe is fit to complex geological condition soil layer constructions such as weak soil layer, sand layer, rock stratum;
2. this tool pipe can be handled the big hard thing of the positive diameter 400mm～500mm of processing;
3. this tool pipe can carry out the slip casting improvement soil body to the front soil layer;
4. excavate face soil body situation and can directly observe its soil property variation, be convenient to the accommodation of construction parameter, under end face earthing variation situation greatly, be easy to Balance Control by observation port;
5. excavate face and operate isolation mutually in the storehouse, being unearthed also is to carry by closed conduit, and the constructor is not subjected to the influence of fuel gas such as underground biogas;
6. such shape tool pipe have cheap, simple and practical, deadweight is light, speed of application is fast.
Description of drawings
Fig. 1 is a structure sectional view of the present invention.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, combined type air pressure balance tool pipe, comprise steel pipe, oil cylinder, by four groups of totally eight 800KN oil cylinders connections, entire tool pipe inside is divided into excavation cabin 1, operational window 2, decompression chamber 3, material cabin 4 four parts successively, uses the steel plate seal isolation between each cabin between per two sections steel pipes, isolate steel plate central authorities establish water-tight sluice door 5 one, and excavation cabin 1, operational window 2, decompression chamber 3, material cabin 4 are connected with full air pressure construction life breath air safeguards system.
Combined type air pressure balance tool pipe of the present utility model: two sections are not had hinge, between the section of front and back, have full air pressure, partial pressure, correction, mud jacking, shutoff, explosion rock stratum function.
Its basic mechanical design feature is as follows:
The operating principle of combined type air pressure balance tool pipe of the present invention is: the positive soil body enters the muddy water cabin after grid is cut apart extruding, be washed into muddy water by the giant fragmentation in the muddy water cabin, after outlet pipe drains into the ground mud pit, efflux then, can adopt partial pressure to be used for stablizing the positive soil body during jacking.
The soil body in excavation cabin 1 is transported in the outer mud-settling pit of active well by 6 writing brush road relays by hydraulic and blow-off line pump after water under high pressure is washed into mud.
Pass through piece rock-block field dike, middle decomposed granite and medium-sand seam construction demand for satisfying push pipe, designed decompression chamber 1, material cabin 5, full air pressure construction life breath air safeguards system, movable rack 6, pre-grouting pipe and breast boards 7, the brim of a hat ductule, pressure release correction valve especially.
(1) 4 work chambers is set
Tool pipe of the present invention is divided into excavation cabin 1, operational window 2, decompression chamber 3, material cabin 4 four parts, and the steel plate seal isolation is arranged between each cabin, and isolate steel plate central authorities establish one water-tight sluice door 5 and can enter for personnel.
Tool pipe is anterior to be excavation cabin 1, and its front end is installed sword pin and grid 6, and their effect is to stablize the front soil body, cut soil and soil compaction.
Excavation 1 back, cabin is an operational window 2, by plastron they are separated, the auxiliary equipment of observation port, illuminating lamp 8 and ball hydraulic giant 9 is installed on the plastron, the workman handles hydraulic giant towards mud and spoil disposal in operational window, and according to the excavation face soil body whether whether stable situation decision adds partial pressure, in particular cases can enter the excavation cabin by the air lock door on the plastron and handle.
Operational window 2 back are decompression chambers 3, and under the normal condition, the workman handles the correction of head attitude misalignment, mud extraction, top power and mud jacking, the shutoff of closing the door in decompression chamber 3, can be to jacking, stop, sending instruction; In full gas construction in particular cases, play the transition depressurization.
For satisfying explosion scarfing cinder requirement under the air pressure conditions, set up a material cabin 4 at tool pipe rear portion 10m, be used for the air pressure conditions explosion and remove obstacles, the mud extraction control valve is arranged, water conservancy machinery etc. in the material cabin.
(2) life-support systems
Consider full air pressure construction needs, the present invention is equipped with full air pressure construction life breath air safeguards system, this system is made up of fixed screw-rod air compressor, tertiary filter, gasholder, container and supporting facility, air compressor produces 0.75MPa compressed air, enter primary filter by pipeline, tentatively filter, part oil water mixture in the removal compressed air and 1 micron dust make the oil content in the compressed air reduce to 0.5mg/m by 3～5ppm
3@21 ℃.Enter two, three grades of fine filters then and filter, remove oil, mist of oil, small material, make compressed air reduce to minimum no oil standard; Deliver in each cabin of tool pipe by the DN80 steel pipe, guarantee that the operating personnel breathes and the requirement of rockhole construction air feed under the full air pressure conditions.
(3) movable rack
Air pressure balance tool pipe grid 6 can be guaranteed tool pipe muddy water cabin intensity and play effect stable, the broken front of the lattice soil body.Need according to the mud jacking construction fully, tool pipe grid 6 of the present utility model is divided into 20 little lattice by horizontal four gussets, vertical five gussets, and the centre is 12 rectangular grid of three rows, and a row is four 350 * 350 a square grid; Four of every rows of two rows totally eight 350 * 400 rectangular opening in addition.
For satisfying sea wall Mechanical Crushing piece stone and crossing rock stratum blast working demand, satisfying the requirement of silt soil jacking construction, do not reduce under the strength condition of tool pipe excavation cabin, four of every rows of two rows totally eight 350 * 400 rectangular opening is removable grid in the middle of the grid 6.
Removable grid is convenient to that the operating personnel holes in tool pipe, broken rock, scarfing cinder construction; Guaranteeing under the safe condition that the operating personnel can carry out operation outside removal hole enters the tool pipe grid.
(4) pre-grouting pipe and breast boards
Set into root pre-grouting pipe at the tool pipe periphery, Grouting Pipe is contracted in the tool pipe under the normal condition, and Grouting Pipe adopts hydraulic means control to stretch out (about extended 2m) during slip casting, is retracted in the tool pipe after the slip casting again.The tool pipe excavation is provided with 8 breast boardss in the storehouse, and breast boards is opened under the normal condition, and breast boards is by the hydraulic jack automatic control switch when needing.
In the work progress, if compressed air " roof fall " phenomenon occurs or the tool pipe front soil body will unstability cave in, can close breast boards this moment, and stretch out the pre-grouting pipe anterior soil is carried out the slip casting improvement soil body, keeps stable gas pressure, continues jacking then.
(5) the brim of a hat ductule
(120 °) gather to arrange 18 ductule holes at the tool pipe top, during scarfing cinder, can insert ductule in the hole during crushing rock formation, and diagonal brace is set at the ductule front end, as the anterior the brim of a hat, can play and support top soil body effect, guarantee that the operating personnel goes out the outer job safety of grid temporarily.(6) pressure release correction valve and high pressure mud flushing tube
Push pipe is passing through up and down or during the stratum of left and right sides geology inequality, run into uneven pressure effect this moment around the push pipe easily, cause that bigger deviation appears in push pipe, often correction was lost efficacy, for satisfying the needs of in particular cases rectifying a deviation, arranged 3 pressure release correction valves and high pressure mud flushing tube up and down at tool pipe, can open the pressure release of pressure release correction valve in case of necessity, and can utilize the high pressure mud flushing tube that the outside soil body is handled, force correction.
Claims (3)
1. combined type air pressure balance tool pipe, comprise steel pipe, oil cylinder, pass through four groups of totally eight oil cylinders connections between per two sections steel pipes, it is characterized in that, whole described tool pipe inside is divided into excavation cabin (1), operational window (2), decompression chamber (3), (4) four parts in material cabin successively, use the steel plate seal isolation between cabin and the cabin, isolate steel plate central authorities establish one water-tight sluice door (5), and described excavation cabin (1), operational window (2), decompression chamber (3), material cabin (4) are connected with life-support systems.
2. combined type air pressure balance tool pipe according to claim 1 is characterized in that described operational window is provided with plastron, and observation port, illuminating lamp (8) and ball hydraulic giant (9) are installed on the plastron.
3. combined type air pressure balance tool pipe according to claim 1 is characterized in that, described tool pipe periphery is provided with eight pre-grouting pipes; The tool pipe excavation is provided with eight breast boardss (7) in the cabin; 18 guide holes of tool pipe top layout; Tool pipe is three pressure release correction valves of arbitrary layout and high pressure mud flushing tube up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102028129A CN101737055B (en) | 2008-11-17 | 2008-11-17 | Combined type air pressure balance tool pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102028129A CN101737055B (en) | 2008-11-17 | 2008-11-17 | Combined type air pressure balance tool pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737055A CN101737055A (en) | 2010-06-16 |
| CN101737055B true CN101737055B (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102028129A Active CN101737055B (en) | 2008-11-17 | 2008-11-17 | Combined type air pressure balance tool pipe |
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| CN (1) | CN101737055B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161959A (en) * | 2011-12-12 | 2013-06-19 | 上海市基础工程有限公司 | Tube push bench sealing device with replaceable deviation rectifying section |
| CN104453917B (en) * | 2014-09-30 | 2016-08-17 | 中交隧道工程局有限公司 | Slurry shield muddy water cabin and bubble cabin mud method of replacing |
| CN108952745A (en) * | 2018-08-21 | 2018-12-07 | 上海交通大学 | A kind of double gas storehouses are rectified a deviation by force air pressure balance jacking pipe machine |
| CN110195596A (en) * | 2019-06-03 | 2019-09-03 | 石家庄铁道大学 | A kind of model test earth pressure balanced push-bench analogy method and constructional device |
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- 2008-11-17 CN CN2008102028129A patent/CN101737055B/en active Active
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| Publication number | Publication date |
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| CN101737055A (en) | 2010-06-16 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Owner name: SHANGHAI FOUNDATION ENGINEERING GROUP CO., LTD. Free format text: FORMER NAME: SHANGHAI FOUNDATION ENGINEERING CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee after: Shanghai Foundation Engineering Group Co., Ltd. Address before: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee before: Shanghai Foundation Engineering Co., Ltd. |