CN112460328A - Construction method of pipe-jacking tunneling machine - Google Patents
Construction method of pipe-jacking tunneling machine Download PDFInfo
- Publication number
- CN112460328A CN112460328A CN202010972996.8A CN202010972996A CN112460328A CN 112460328 A CN112460328 A CN 112460328A CN 202010972996 A CN202010972996 A CN 202010972996A CN 112460328 A CN112460328 A CN 112460328A
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- Prior art keywords
- jacking
- pipe
- pipeline
- well
- tunneling machine
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 230000005641 tunneling Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
-
- 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
- F16L1/06—Accessories therefor, e.g. anchors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method of a pipe-jacking tunneling machine in the field of pipe-jacking machines, and particularly relates to a construction method of a pipe-jacking tunneling machine. The construction method of the pipe-jacking tunneling machine comprises the steps of firstly, excavating a vertical well, excavating an initial well and a receiving well by adopting an open excavation method, and placing a pipe-jacking machine head and a cutter head into the initial well; step two, erecting a working platform around the starting well, and erecting a hoisting frame and a winch on the working platform; step three, placing a cutter head of the pipe-jacking tunneling machine into the receiving well, arranging an oil cylinder at one end of the cutter head, and calculating the thrust of the oil cylinder; step four, selecting a sliding heavy rail, jacking the first section of concrete pipeline, then placing the next section of concrete pipeline on the heavy rail, repeatedly excavating the tunnel and jacking the pipeline, and jacking all the concrete pipelines into the receiving well; and step five, recovering the cutter head and the pipeline. The invention has good universality and is suitable for different cutter heads and construction places.
Description
Technical Field
The invention relates to the technical field of pipe-jacking machines, in particular to a construction method of a pipe-jacking tunneling machine.
Background
The pipe jacking technology gradually becomes a construction technology means mastered and applied by more small and medium-sized construction units, and is not a proprietary technology of some large-scale construction enterprises. The pipe-jacking construction method is gradually applied to middle and western cities from a developed coastal region, and the geological conditions of pipe-jacking construction can be applied to complicated and variable soft and hard stratums along with the continuous development of the technology. The pipe jacking construction provides an effective and convenient construction way for jacking underground box culverts under highway and railway roadbeds, and simultaneously provides a scientific and effective method for large-scale underground pipe network construction projects such as underground pipeline laying and on-line modification projects of underground pipelines.
The pipe jacking method is used for enabling the pipeline to conveniently pass through railways, highways, water ways and other obstacles, and the purpose of pipe jacking construction technology is the earliest to be applied by people. The underground crossing engineering has the advantages that the jacking length is generally small, the jacking length is dozens of meters less, the jacking length is hundreds of meters more, a working well and a receiving well in the construction process are single, trenching operation can be performed even without arranging the working well and the receiving well when the embankment section is jacked, the construction is very convenient, the construction speed is high, the construction period is short, however, the cutter head is required to have certain jacking force to realize the propulsion of the cutter head in the long-length construction process, and the inventor provides further improvement on the construction.
Disclosure of Invention
The invention aims to provide a construction method of a pipe-jacking tunneling machine, which has good universality and is adaptive to different cutterheads and construction places.
In order to achieve the purpose, the construction method of the pipe-jacking tunneling machine adopts the following technical scheme:
a construction method of a pipe-jacking tunneling machine comprises the following steps:
step one, vertical shaft excavation, namely excavating an initial well and a receiving well by adopting an open excavation method, and placing a pipe jacking machine head and a cutter head into the initial well;
step two, erecting a working platform around the starting well, and erecting a hoisting frame and a winch on the working platform;
step three, placing a cutter head of the pipe-jacking tunneling machine into the receiving well, arranging an oil cylinder at one end of the cutter head, calculating the axial allowable jacking force of the pipeline,
in the formula Fr-allowable pipeline stress (kN);
σc-pipe body compressive strength (kPa);
a-area of pressing by jacking force (m)2)；
S-safety factor;
the dimensions between the receiving well and the originating well are calculated,
L＝l1+l2+l3+S1+S2+S3
l in the formula is the length of the bottom of the working pit;
l1-length of pipe section;
l2-jack length;
l3-the back thickness;
S1-the distance the jacking pipe section is pre-set on the guide rail;
S2-unearthing in the pipe, leaving a length at the tail of the pipe;
S3the additional length during the U-turn jacking is generally larger than 0.5m, and the one-way jacking is 0;
calculating the stress of the back rest after the operation,
in the formula: r is the counter force of the total thrust;
alpha-coefficient (taking 1.5-2.5);
b-the width of the rear seat wall (m);
gamma-volume weight of soil (kN/m)3)；
H-height of rear seat wall (m),;
KP-passive earth pressure system
Taking 8;
c-soil cohesion (kPa);
h is the height from the ground to the soil mass at the top of the back wall;
calculate the combination of the thrust of the cylinder being greater than the allowable jacking force and the stress on the back
Step four, selecting a sliding heavy rail, jacking the first section of concrete pipeline, then placing the next section of concrete pipeline on the heavy rail, repeatedly excavating the tunnel and jacking the pipeline, and jacking all the concrete pipelines into the receiving well;
and step five, recovering the cutter head and the pipeline.
The construction method of the pipe-jacking tunneling machine is further improved in the fourth step, the jacking direction of the concrete pipeline is measured in time during jacking, and each jacking time of the first section of the concrete pipeline is 20-50 cm/time; when the jack is normally pushed, pushing for 1 m/time; and if the measured rear direction deviation is more than 10mm, performing pipe jacking deviation rectifying correction.
The construction method of the pipe-jacking tunneling machine is further improved in that the construction method further comprises an air supply device which is arranged in the working well and supplies air to the designed pipeline, and the air volume of the air supply device is not less than 25 liters per second.
Compared with the prior art, the invention has the beneficial effects that: good universality, and is adaptive to different cutter heads and construction places
Detailed Description
The present invention is further illustrated by the following detailed description, which is to be construed as merely illustrative and not limitative of the remainder of the disclosure, and modifications and variations such as those ordinarily skilled in the art can be made without departing from the scope of the present invention are intended to be limited only by the appended claims.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the present invention can be specifically understood by those of ordinary skill in the art.
A construction method of a pipe-jacking tunneling machine comprises the following steps:
step one, vertical shaft excavation, namely excavating an initial well and a receiving well by adopting an open excavation method, and placing a pipe jacking machine head and a cutter head into the initial well;
step two, erecting a working platform around the starting well, and erecting a hoisting frame and a winch on the working platform;
step three, placing a cutter head of the pipe-jacking tunneling machine into the receiving well, arranging an oil cylinder at one end of the cutter head, calculating the axial allowable jacking force of the pipeline,
in the formula Fr-allowable pipeline stress (kN);
σc-pipe body compressive strength (kPa);
a-area of pressing by jacking force (m)2)；
S-safety factor;
the dimensions between the receiving well and the originating well are calculated,
L＝1l+2l+3l+S1+S2+S3
l in the formula is the length of the bottom of the working pit;
l1-length of pipe section;
l2-jack length;
l3-the back thickness;
S1-the distance the jacking pipe section is pre-set on the guide rail;
S2-unearthing in the pipe, leaving a length at the tail of the pipe;
S3the additional length during the U-turn jacking is generally larger than 0.5m, and the one-way jacking is 0;
calculating the stress of the back rest after the operation,
in the formula: r is the counter force of the total thrust;
alpha-coefficient (taking 1.5-2.5);
b-the width of the rear seat wall (m);
gamma-volume weight of soil (kN/m)3)；
H-height of rear seat wall (m),;
KP-passive earth pressure system
Taking 8;
c-soil cohesion (kPa);
h is the height from the ground to the soil mass at the top of the back wall;
calculate the combination of the thrust of the cylinder being greater than the allowable jacking force and the stress on the back
Step four, selecting a sliding heavy rail, jacking the first section of concrete pipeline, then placing the next section of concrete pipeline on the heavy rail, repeatedly excavating the tunnel and jacking the pipeline, and jacking all the concrete pipelines into the receiving well;
and step five, recovering the cutter head and the pipeline.
The construction method of the pipe-jacking tunneling machine is further improved in the fourth step, the jacking direction of the concrete pipeline is measured in time during jacking, and each jacking time of the first section of the concrete pipeline is 20-50 cm/time; when the jack is normally pushed, pushing for 1 m/time; and if the measured rear direction deviation is more than 10mm, performing pipe jacking deviation rectifying correction.
The construction method of the pipe-jacking tunneling machine is further improved in that the construction method further comprises an air supply device which is arranged in the working well and supplies air to the designed pipeline, and the air volume of the air supply device is not less than 25 liters per second.
Claims (3)
1. A construction method of a pipe-jacking tunneling machine is characterized by comprising the following steps:
step one, vertical shaft excavation, namely excavating an initial well and a receiving well by adopting an open excavation method, and placing a pipe jacking machine head and a cutter head into the initial well;
step two, erecting a working platform around the starting well, and erecting a hoisting frame and a winch on the working platform;
step three, placing a cutter head of the pipe-jacking tunneling machine into the receiving well, arranging an oil cylinder at one end of the cutter head, calculating the axial allowable jacking force of the pipeline,
in the formula Fr-allowable pipeline stress (kN);
σc-pipe body compressive strength (kPa);
a-area of pressing by jacking force (m)2)；
S-safety factor;
the dimensions between the receiving well and the originating well are calculated,
L＝1l+2l+3l+S1+S2+S3
l in the formula is the length of the bottom of the working pit;
l1-length of pipe section; l2-jack length;
l3-the back thickness;
S1-the distance the jacking pipe section is pre-set on the guide rail;
S2-unearthing in the pipe, leaving a length at the tail of the pipe;
S3-additional length when turning around and jacking;
calculating the stress of the back rest after the operation,
in the formula: r is the counter force of the total thrust;
alpha-coefficient (taking 1.5-2.5);
b-the width of the rear seat wall (m);
gamma-volume weight of soil (kN/m)3)；
H-height of rear seat wall (m),;
KP-passive earth pressure system
Taking 8;
c-soil cohesion (kPa);
h is the height from the ground to the soil mass at the top of the back wall;
calculate the combination of the thrust of the cylinder being greater than the allowable jacking force and the stress on the back
Step four, selecting a sliding heavy rail, jacking the first section of concrete pipeline, then placing the next section of concrete pipeline on the heavy rail, repeatedly excavating the tunnel and jacking the pipeline, and jacking all the concrete pipelines into the receiving well;
and step five, recovering the cutter head and the pipeline.
2. The pipe-jacking tunneling machine construction method according to claim 1, characterized in that: in the fourth step, the jacking direction of the concrete pipeline is measured in time when the concrete pipeline is jacked, and each jacking time is 20-50 cm/time when the first section of the concrete pipeline is jacked; when the jack is normally pushed, pushing for 1 m/time; and if the measured rear direction deviation is more than 10mm, performing pipe jacking deviation rectifying correction.
3. The pipe-jacking tunneling machine construction method according to claim 1, characterized in that: the air supply device is arranged in the working well and used for supplying air to the designed pipeline, and the air quantity of the air supply device is not less than 25 liters per second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972996.8A CN112460328A (en) | 2020-09-16 | 2020-09-16 | Construction method of pipe-jacking tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972996.8A CN112460328A (en) | 2020-09-16 | 2020-09-16 | Construction method of pipe-jacking tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112460328A true CN112460328A (en) | 2021-03-09 |
Family
ID=74833352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010972996.8A Withdrawn CN112460328A (en) | 2020-09-16 | 2020-09-16 | Construction method of pipe-jacking tunneling machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283106A (en) * | 2021-06-10 | 2021-08-20 | 中铁九局集团有限公司 | Method for predicting influence of pipe-jacking tunneling machine construction on safety of overlying pipeline |
| CN114508629A (en) * | 2022-01-24 | 2022-05-17 | 中铁四局集团有限公司 | Pipe jacking construction method for penetrating through mixed egg gravel layer and sandstone layer |
-
2020
- 2020-09-16 CN CN202010972996.8A patent/CN112460328A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283106A (en) * | 2021-06-10 | 2021-08-20 | 中铁九局集团有限公司 | Method for predicting influence of pipe-jacking tunneling machine construction on safety of overlying pipeline |
| CN113283106B (en) * | 2021-06-10 | 2024-02-13 | 中铁九局集团有限公司 | Method for predicting influence of pipe jacking tunneling machine construction on safety of overlying pipeline |
| CN114508629A (en) * | 2022-01-24 | 2022-05-17 | 中铁四局集团有限公司 | Pipe jacking construction method for penetrating through mixed egg gravel layer and sandstone layer |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210309 |