CN111022759A - Large-diameter pipeline pipe jacking construction process - Google Patents
Large-diameter pipeline pipe jacking construction process Download PDFInfo
- Publication number
- CN111022759A CN111022759A CN202010030368.8A CN202010030368A CN111022759A CN 111022759 A CN111022759 A CN 111022759A CN 202010030368 A CN202010030368 A CN 202010030368A CN 111022759 A CN111022759 A CN 111022759A
- Authority
- CN
- China
- Prior art keywords
- pipe
- jacking
- construction
- well
- sinking
- 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
-
- 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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
Abstract
A large-diameter pipeline pipe jacking construction process comprises the steps of measuring, positioning and paying off, descending and draining underground water, excavating a working well, constructing the working well, installing and debugging jacking equipment, hoisting a concrete pipe to a track, connecting a tool pipe, installing jacking iron, starting an oil pump to jack in, discharging mud, penetrating a pipeline, disassembling the tool pipe and building an inspection well. The invention adopts the mud-water balance pipe jacking construction method, has high construction speed and safety, does not cause the settlement of surrounding buildings and structures and influence on traffic, and obtains good predicted effect in the aspect of jacking line control. As a construction technology for laying underground pipelines under the condition of no excavation of the earth surface, the pipe-jacking construction technology has the advantages of low comprehensive cost, short construction period, small environmental influence, good construction safety and the like, and can be applied more and more widely in municipal engineering.
Description
Technical Field
The invention relates to the technical field of underground pipeline construction, in particular to a pipe-jacking construction process for a large-diameter pipeline.
Background
The pipe-jacking construction is a construction method of underground pipelines developed after shield construction, does not need to excavate a surface layer, and can pass through highways, railways, rivers, ground buildings, underground structures, various underground pipelines and the like. In the pipe jacking construction, by means of the thrust of a main jacking oil cylinder, an inter-pipeline relay and the like, a tool pipe or a heading machine is pushed from a working well through a soil layer until the tool pipe or the heading machine is hoisted in a receiving well. Meanwhile, the pipeline following the tool pipe or the heading machine is buried between the two wells, so that the construction method for laying the underground pipeline without excavating is realized.
The construction scheme of the pipe jacking is more, and the commonly used pipe jacking modes comprise a hand-digging type, an extrusion type, a muddy water balanced type, a three-section two-hinge type hydraulic excavation type and a multi-cutter-disc soil pressure balanced type.
Aiming at geological conditions, the surface layer is filled with soil and silty clay, the local part is mucky soil, and the lower layer is silty sand. The groundwater supply mainly takes the permeation supply of the ai yi river water and the lateral runoff of the ditch, the groundwater dynamic is mainly influenced by factors such as weather and hydrology, and is seasonally changed, the water level change range is 0.5m-1.0m, and the groundwater level is higher. Because rainwater pipeline buried depth average depth is 6.5m, adopts traditional sloping excavation, and the volume of digging is big, and is consuming time longer, also can cause the disturbance influence to the piping lane.
Disclosure of Invention
In view of the above technical problems, the embodiment of the present invention provides a pipe-jacking construction process for a large-diameter pipeline.
A large-diameter pipeline pipe jacking construction process comprises the steps of measuring, positioning and paying off, descending and draining underground water, excavating a working well, constructing the working well, installing and debugging jacking equipment, hoisting a concrete pipe to a track, connecting a tool pipe, installing jacking iron, starting an oil pump to jack in, discharging mud, penetrating a pipeline, disassembling the tool pipe and building an inspection well.
① the terrace of the cylinder should be under 1.5m of the standard height of the spot, should have cushion bed with sufficient intensity under the foot of cutting edge, in order to avoid the open caisson from producing uneven settlement and slope in the course of making the cylinder;
② sinking the open caisson by sections, sequentially constructing bottom sealing concrete, bottom plate and counterweight wall after the open caisson sinks to the designed elevation, connecting pipelines in the well and constructing other members after the pipe-jacking project is finished, and roughening the well body part contacted with the secondary pouring member before sinking;
③ after the first section of sinking well is made, sinking construction can be carried out after the concrete of the well wall reaches more than 85% strength, before sinking, the cushion layer under the ground beam should be removed evenly, then the cushion layer under the blade foot should be removed evenly, the opening on the well wall is blocked by steel plate;
④ in the process of sinking, the soil in the central area of the cylinder is removed first, and then the soil in the area of the blade foot is removed;
⑤ controlling the sinking speed to prevent sudden sinking, excessive sinking and inclination of the open caisson;
⑥ pouring concrete to cover the bottom of the barrel after the barrel sinks to the design height experience folding grid, leveling the foundation before sealing the bottom, and cleaning the mud on the surface of the well and the blade leg;
⑦ the contact parts of the well wall, the blade foot, the bottom sealing concrete and the bottom plate are roughened to be rough surfaces and washed clean, so as to be beneficial to the tight combination of the new concrete and the old concrete;
⑧ the bottom sealing concrete can be used for bottom plate construction after reaching 100% strength, and the surface of the bottom sealing concrete should be washed clean before the bottom plate construction;
⑨ in order to facilitate sinking of the open caisson, the pipe well is used for precipitation to lower the groundwater to 1.5m below the bottom plate level.
Drag reduction is carried out by thixotropic slurry formed by stirring bentonite and water according to the mixing ratio of 1: 8; thereby ensuring the smooth proceeding of jacking work and taking effective anti-drag measures in construction.
In the mud discharging link, cement mortar or fly ash cement mortar is adopted to replace thixotropic mud on the outer side of the pipe so as to keep the stability of the pipeline.
The stability of the water and soil pressure in front of the tool pipe is always kept in the pipe jacking construction process, and the soil output quantity is matched with the jacking speed so as to prevent roof collapse or collapse accidents.
Has the advantages that:
the invention adopts the mud-water balance pipe jacking construction method, has high construction speed and safety, does not cause the settlement of surrounding buildings and structures and influence on traffic, and obtains good predicted effect in the aspect of jacking line control. As a construction technology for laying underground pipelines under the condition of no excavation of the earth surface, the pipe-jacking construction technology has the advantages of low comprehensive cost, short construction period, small environmental influence, good construction safety and the like, and can be applied more and more widely in municipal engineering.
Specifically, the method comprises the following steps:
⑴ the applicable pipe diameter range is large, because the specification of the project push pipe is different from DN600 to DN2000, the mud-water balance type belongs to wet unearthing, and is usually applicable to medium and small caliber push pipes, thus being very applicable.
⑵, compared with other types of push pipes, the push pipe has a smaller total push force during the construction of muddy water push pipes, and the performance is more prominent particularly in the case of a powder clay layer, so the push pipe is particularly suitable for long-distance push pipes.
⑶, the safety is good, the working environment in the working pit is good, the operation is safe, and because it adopts the muddy water pipeline to transport the waste soil, there is no dangerous operation such as soil lifting and carrying.
⑷ the construction speed is high, the mud-water conveying spoil is continuous operation, so the speed is high.
⑸, the stability of digging surface can be effectively kept, the disturbance to soil around the pipe is small, so the ground subsidence caused by pipe jacking is small.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.
Example embodiments will now be described with reference to the accompanying drawings, which may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
The invention provides a large-diameter pipeline jacking pipe construction process which comprises the steps of measuring, positioning and paying off, descending and draining underground water, excavating a working well, constructing the working well, installing and debugging jacking equipment, hoisting a concrete pipe to a track, connecting a tool pipe, installing jacking iron, starting an oil pump to jack in, discharging mud, penetrating a pipeline, disassembling the tool pipe and building an inspection well.
① the terrace of the cylinder should be under 1.5m of the standard height of the spot, should have cushion bed with sufficient intensity under the foot of cutting edge, in order to avoid the open caisson from producing uneven settlement and slope in the course of making the cylinder;
② sinking the open caisson by sections, sequentially constructing bottom sealing concrete, bottom plate and counterweight wall after the open caisson sinks to the designed elevation, connecting pipelines in the well and constructing other members after the pipe-jacking project is finished, and roughening the well body part contacted with the secondary pouring member before sinking;
③ after the first section of sinking well is made, sinking construction can be carried out after the concrete of the well wall reaches more than 85% strength, before sinking, the cushion layer under the ground beam should be removed evenly, then the cushion layer under the blade foot should be removed evenly, the opening on the well wall is blocked by steel plate;
④ in the process of sinking, the soil in the central area of the cylinder is removed first, and then the soil in the area of the blade foot is removed;
⑤ controlling the sinking speed to prevent sudden sinking, excessive sinking and inclination of the open caisson;
⑥ pouring concrete to cover the bottom of the barrel after the barrel sinks to the design height experience folding grid, leveling the foundation before sealing the bottom, and cleaning the mud on the surface of the well and the blade leg;
⑦ the contact parts of the well wall, the blade foot, the bottom sealing concrete and the bottom plate are roughened to be rough surfaces and washed clean, so as to be beneficial to the tight combination of the new concrete and the old concrete;
⑧ the bottom sealing concrete can be used for bottom plate construction after reaching 100% strength, and the surface of the bottom sealing concrete should be washed clean before the bottom plate construction;
⑨ in order to facilitate sinking of the open caisson, the pipe well is used for precipitation to lower the groundwater to 1.5m below the bottom plate level.
Drag reduction is carried out by thixotropic slurry formed by stirring bentonite and water according to the mixing ratio of 1: 8; thereby ensuring the smooth proceeding of jacking work and taking effective anti-drag measures in construction.
In the mud discharging link, cement mortar or fly ash cement mortar is adopted to replace thixotropic mud on the outer side of the pipe so as to keep the stability of the pipeline.
The stability of the water and soil pressure in front of the tool pipe is always kept in the pipe jacking construction process, and the soil output quantity is matched with the jacking speed so as to prevent roof collapse or collapse accidents.
Has the advantages that:
the invention adopts the mud-water balance pipe jacking construction method, has high construction speed and safety, does not cause the settlement of surrounding buildings and structures and influence on traffic, and obtains good predicted effect in the aspect of jacking line control. As a construction technology for laying underground pipelines under the condition of no excavation of the earth surface, the pipe-jacking construction technology has the advantages of low comprehensive cost, short construction period, small environmental influence, good construction safety and the like, and can be applied more and more widely in municipal engineering.
Specifically, the method comprises the following steps:
⑴ the applicable pipe diameter range is large, because the specification of the project push pipe is different from DN600 to DN2000, the mud-water balance type belongs to wet unearthing, and is usually applicable to medium and small caliber push pipes, thus being very applicable.
⑵, compared with other types of push pipes, the push pipe has a smaller total push force during the construction of muddy water push pipes, and the performance is more prominent particularly in the case of a powder clay layer, so the push pipe is particularly suitable for long-distance push pipes.
⑶, the safety is good, the working environment in the working pit is good, the operation is safe, and because it adopts the muddy water pipeline to transport the waste soil, there is no dangerous operation such as soil lifting and carrying.
⑷ the construction speed is high, the mud-water conveying spoil is continuous operation, so the speed is high.
⑸, the stability of digging surface can be effectively kept, the disturbance to soil around the pipe is small, so the ground subsidence caused by pipe jacking is small.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to this embodiment will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the specification and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order.
Claims (5)
1. A large-diameter pipeline pipe jacking construction process comprises the steps of measuring, positioning and paying off, descending and draining underground water, excavating a working well, constructing the working well, installing and debugging jacking equipment, hoisting a concrete pipe to a track, connecting a tool pipe, installing jacking iron, starting an oil pump to jack in, discharging mud, penetrating a pipeline, disassembling the tool pipe and building an inspection well.
2. The construction process according to claim 1, wherein:
① the terrace of the cylinder should be under 1.5m of the standard height of the spot, should have cushion bed with sufficient intensity under the foot of cutting edge, in order to avoid the open caisson from producing uneven settlement and slope in the course of making the cylinder;
② sinking the open caisson by sections, sequentially constructing bottom sealing concrete, bottom plate and counterweight wall after the open caisson sinks to the designed elevation, connecting pipelines in the well and constructing other members after the pipe-jacking project is finished, and roughening the well body part contacted with the secondary pouring member before sinking;
③ after the first section of sinking well is made, sinking construction can be carried out after the concrete of the well wall reaches more than 85% strength, before sinking, the cushion layer under the ground beam should be removed evenly, then the cushion layer under the blade foot should be removed evenly, the opening on the well wall is blocked by steel plate;
④ in the process of sinking, the soil in the central area of the cylinder is removed first, and then the soil in the area of the blade foot is removed;
⑤ controlling the sinking speed to prevent sudden sinking, excessive sinking and inclination of the open caisson;
⑥ pouring concrete to cover the bottom of the barrel after the barrel sinks to the design height experience folding grid, leveling the foundation before sealing the bottom, and cleaning the mud on the surface of the well and the blade leg;
⑦ the contact parts of the well wall, the blade foot, the bottom sealing concrete and the bottom plate are roughened to be rough surfaces and washed clean, so as to be beneficial to the tight combination of the new concrete and the old concrete;
⑧ the bottom sealing concrete can be used for bottom plate construction after reaching 100% strength, and the surface of the bottom sealing concrete should be washed clean before the bottom plate construction;
⑨ in order to facilitate sinking of the open caisson, the pipe well is used for precipitation to lower the groundwater to 1.5m below the bottom plate level.
3. The construction process according to claim 1, wherein:
drag reduction is carried out by thixotropic slurry formed by stirring bentonite and water according to the mixing ratio of 1: 8; thereby ensuring the smooth proceeding of jacking work and taking effective anti-drag measures in construction.
4. The construction process according to claim 1, wherein:
in the mud discharging link, cement mortar or fly ash cement mortar is adopted to replace thixotropic mud on the outer side of the pipe so as to keep the stability of the pipeline.
5. The construction process according to claim 1, wherein:
the stability of the water and soil pressure in front of the tool pipe is always kept in the pipe jacking construction process, and the soil output quantity is matched with the jacking speed so as to prevent roof collapse or collapse accidents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030368.8A CN111022759A (en) | 2020-01-13 | 2020-01-13 | Large-diameter pipeline pipe jacking construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030368.8A CN111022759A (en) | 2020-01-13 | 2020-01-13 | Large-diameter pipeline pipe jacking construction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022759A true CN111022759A (en) | 2020-04-17 |
Family
ID=70198873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010030368.8A Pending CN111022759A (en) | 2020-01-13 | 2020-01-13 | Large-diameter pipeline pipe jacking construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022759A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900494A (en) * | 2021-03-01 | 2021-06-04 | 核工业井巷建设集团有限公司 | Long-distance pipe jacking construction method for urban underground pipe gallery |
| CN113775823A (en) * | 2021-08-19 | 2021-12-10 | 中建三局安装工程有限公司 | Construction method of underwater pipe jacking tool |
-
2020
- 2020-01-13 CN CN202010030368.8A patent/CN111022759A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900494A (en) * | 2021-03-01 | 2021-06-04 | 核工业井巷建设集团有限公司 | Long-distance pipe jacking construction method for urban underground pipe gallery |
| CN112900494B (en) * | 2021-03-01 | 2022-03-11 | 核工业井巷建设集团有限公司 | Long-distance pipe jacking construction method for urban underground pipe gallery |
| CN113775823A (en) * | 2021-08-19 | 2021-12-10 | 中建三局安装工程有限公司 | Construction method of underwater pipe jacking tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102454167B (en) | The construction method of especially big & deep open caisson | |
| CN102418347B (en) | Drainage construction method for blind drain and sump wells in deep foundation pit | |
| CN103615010A (en) | Construction method of digging and conveying earth of deep foundation pit through current scour | |
| CN104947654A (en) | Complicated water area inclined rock face large-diameter cast-in-place pile and construction method | |
| CN103015429A (en) | Long auger rotary-jet mixing steel reinforced cement-soil pile foundation pit water-resisting and supporting method | |
| CN111022759A (en) | Large-diameter pipeline pipe jacking construction process | |
| CN114411756A (en) | Construction method and construction device for water-rich sand layer subway station open excavation foundation pit without precipitation | |
| CN103628507B (en) | Push pipe passes through the shallow earthing anti-floating construction method in seabed | |
| CN215105880U (en) | Concrete inverted well suitable for connecting new and old water supply and drainage pipelines | |
| CN102864833A (en) | Application of finished plastic inspection well in outdoor drainage system | |
| CN111733853A (en) | Tongue-and-groove type prefabricated underground continuous wall structure | |
| CN110117959B (en) | Construction method for foundation pit support near river | |
| CN111851546A (en) | Construction method for sealing precipitation of drainage well in deep foundation pit construction | |
| CN104846837A (en) | Construction method for ultra-deep well pit in surface drainage foundation pit | |
| CN113266362B (en) | Top pipe cover excavation construction method for penetrating through existing dense anchor cable area | |
| CN210315908U (en) | Immersed tube type inspection well | |
| CN207484487U (en) | For the steel drum that catchments of deep basal pit crack sealing with pressure | |
| CN208023600U (en) | A kind of caisson structure suitable for complex environment | |
| CN111894103A (en) | Pipe jacking connection guide row structure and pipe jacking connection method | |
| CN109024652A (en) | A kind of discharge structure and its construction method of region of FuShui pile foundation spiral-digging pore mud | |
| CN111022764B (en) | Dry construction method for water diversion pipe water-land adapter | |
| CN215715439U (en) | Underground water sealing system for building foundation pit | |
| KR102113117B1 (en) | Structure construction method using guide wall | |
| CN113668585B (en) | Open caisson structure for deep and large water intaking in high-pressure water area and construction method | |
| CN219450785U (en) | Intelligent precipitation system for open caisson foundation pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |
|
| RJ01 | Rejection of invention patent application after publication |