CN117646638A - Force transmission construction method by using top pipe reaction frame of existing station main body structure - Google Patents
Force transmission construction method by using top pipe reaction frame of existing station main body structure Download PDFInfo
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- CN117646638A CN117646638A CN202410123396.2A CN202410123396A CN117646638A CN 117646638 A CN117646638 A CN 117646638A CN 202410123396 A CN202410123396 A CN 202410123396A CN 117646638 A CN117646638 A CN 117646638A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 108
- 238000010276 construction Methods 0.000 title claims abstract description 76
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 238000012806 monitoring device Methods 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 description 20
- 238000012545 processing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the technical field of tunnel construction, and provides a force transmission construction method of a pipe jacking reaction frame by utilizing an existing station main body structure, which comprises the following steps: arranging a supporting groove body on one side of the existing wall body of the jacking pipe starting well, which is away from the jacking pipe; a plurality of reaction frames for supporting the wall body are arranged in the supporting groove body; supporting the jacking pipe on the existing wall body, and running jacking pipe construction; and arranging a monitoring device on the reaction frame and/or the existing wall body, monitoring whether the reaction frame deforms in real time, if not, continuing pipe jacking construction, and if so, suspending pipe jacking construction. The invention can provide enough reverse supporting force for the existing wall body and the pipe jacking structure through the support of the reaction frame, so that the pipe jacking structure has enough safety and stability in the pipe jacking construction process, is more suitable for construction in wells with complex structures, and ensures the smooth jacking of the pipe jacking. According to the invention, the deformation information of the reaction frame can be obtained in real time through the arrangement of the monitoring device, and whether the construction needs to be continued or not is judged through the deformation information, so that the safety of the construction is ensured.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a force transmission construction method of a pipe jacking counter-force frame by utilizing an existing station main body structure.
Background
The conventional pipe jacking construction is to support the pipe jacking and jacking equipment through a solid wall in the pipe jacking starting well, and provide reverse supporting force for the pipe jacking, so that the jacking force generated by the jacking equipment is overcome by the jacking force of the pipe jacking, the friction force between the pipeline and surrounding soil is overcome, the pipeline is jacked into the soil according to the designed gradient, and the earthwork is carried away. However, the scheme is only suitable for the scene that one side of the supporting jacking pipe is a solid wall body, namely, the back of the wall body is free of other channels or other structures, the thickness of the whole wall body is thicker, and the back of the wall body is still a solid supporting structure, so that the wall body cannot deform in the jacking process of the jacking pipe. However, for the scene that the back of the wall body is provided with other channels or other structures, the scheme cannot be applied, for example, the back of the wall body is provided with other transfer channels, and at the moment, the wall body is supported by the wall body to support the jacking pipe, so that potential safety hazards of deformation or damage collapse of the wall body are easily generated.
Disclosure of Invention
The invention aims to solve at least one technical problem in the background art and provides a force transmission construction method by using a top pipe reaction frame of an existing station main body structure.
In order to achieve the above object, the present invention provides a force transmission construction method using a top pipe reaction frame of an existing station main body structure, comprising:
arranging a supporting groove body on one side of the existing wall body of the jacking pipe starting well, which is away from the jacking pipe;
a plurality of reaction frames for supporting the wall body are arranged in the supporting groove body;
supporting the jacking pipe on the existing wall body, and running jacking pipe construction;
and arranging a monitoring device on the reaction frame and/or the existing wall body, monitoring whether the reaction frame deforms in real time, if not, continuing pipe jacking construction, and if so, suspending pipe jacking construction.
According to one aspect of the invention, the reaction frames are arranged in parallel with each other and spaced apart in the supporting channel of the existing wall.
According to one aspect of the invention, the reaction frame is a right-angle tripod and consists of a first right-angle supporting rod, a second right-angle supporting rod and an inclined rod;
the first right-angle supporting rod is fixedly connected with the supporting groove body;
the second right-angle supporting rod is fixedly connected with the bottom supporting structure;
the inclined rod is fixedly connected with the first right-angle supporting rod and the second right-angle supporting rod.
According to one aspect of the invention, the length of the first right angle support bar is equal to or less than the length of the second right angle support bar.
According to one aspect of the invention, a plurality of connecting plates are arranged at two sides of the second right-angle supporting rod at intervals, and each connecting plate is fixedly connected with the bottom supporting structure through expansion bolts.
According to one aspect of the invention, the monitoring device is arranged on the tilt rod and is arranged facing the first right angle support rod and/or the second right angle support rod;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change.
According to one aspect of the invention, the monitoring device is arranged in the support groove and faces the first right-angle support bar;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change.
According to one aspect of the present invention, further comprising: when the deformation of the reaction frame is judged, judging whether the deformation exceeds a threshold range, continuing pipe jacking construction when the deformation does not exceed the threshold range, and overhauling or replacing the reaction frame when the deformation does not exceed the threshold range;
the judging whether the deformation exceeds a threshold range is as follows: and acquiring a data change value generated when the reaction frame deforms by the monitoring device, judging whether the data change value is in the threshold range, judging that the deformation exceeds the threshold range when the data change value is not in the threshold range, and judging that the deformation does not exceed the threshold range when the data change value is in the threshold range.
According to one aspect of the invention, the monitoring device is a laser sensor.
According to one aspect of the invention, the jacking pipe is a rectangular jacking pipe.
According to one scheme of the invention, the force transmission construction method by using the top pipe reaction frame of the existing station main body structure comprises the following steps: arranging a supporting groove body on one side of the existing wall body of the jacking pipe starting well, which is away from the jacking pipe; a plurality of reaction frames for supporting the wall body are arranged in the supporting groove body; supporting the jacking pipe on the existing wall body, and running jacking pipe construction; and arranging a monitoring device on the reaction frame and/or the existing wall body, monitoring whether the reaction frame deforms in real time, if not, continuing pipe jacking construction, and if so, suspending pipe jacking construction. By the arrangement, the reaction frame can be stably supported through the supporting groove body on the existing wall body, so that the reaction frame is prevented from reversely shifting in posture on the basis of providing a reaction force on the supporting wall body, and the supporting stability is ensured; moreover, through monitoring devices's setting, can make the deformation information that can acquire the reaction frame in real time, can accurately learn the support of push pipe in the push pipe work progress whether stable through deformation information, whether bearing structure can take place the potential safety hazard, guarantees construction safety and stability in the pit, guarantees going on smoothly of construction.
According to one embodiment of the invention, the reaction frames are arranged parallel to one another and spaced apart in the support channel of the existing wall. So set up, can be so that provide balanced even reverse holding power through a plurality of reaction frames, construction installation convenient and fast guarantees the stability and the convenience that the construction supported moreover.
According to one scheme of the invention, the reaction frame is a right-angle tripod and consists of a first right-angle supporting rod, a second right-angle supporting rod and an inclined rod; the first right-angle support rod is fixedly connected with the support groove body; the second right-angle support rod is fixedly connected with the bottom support structure; the inclined rod is fixedly connected with the first right-angle supporting rod and the second right-angle supporting rod. So set up, can be so that promote structural stability through triangle-shaped's design, guarantee more stable firm when providing reverse holding power, with first right angle bracing piece and second right angle bracing piece respectively with wall body and bottom foundation structure fixed connection moreover, can further improve structural stability and bulk strength, effectively promote the security and the stability of push pipe work progress.
According to one aspect of the invention, the length of the first right angle support bar is equal to or less than the length of the second right angle support bar. So set up, can make the support focus through the reaction frame more steady for have more stable supporting strength when supporting through first right-angle bracing piece and providing the counter-force, effectively reduce and avoid even the reaction frame to produce gesture skew or deformation in the push pipe work progress.
According to one scheme of the invention, a plurality of connecting plates are arranged at two sides of the second right-angle supporting rod at intervals, and each connecting plate is fixedly connected with the bottom supporting structure through expansion bolts. The arrangement can make the support of the second right-angle support rod more stable, effectively increase the fixed connection area and the fixed connection strength, and improve the grabbing force.
According to one aspect of the present invention, a monitoring device is disposed on the reaction frame and/or the existing wall, and monitors in real time whether the reaction frame is deformed into: disposing the monitoring device on the tilt bar and facing the first right angle support bar and/or the second right angle support bar; and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change. The monitoring device may be a laser sensor. So set up, can be so that monitor the initial position of first right angle bracing piece and/or second right angle bracing piece and take place deformation and produce the position change after the displacement through laser sensor to obtain the displacement value of first right angle bracing piece and/or second right angle bracing piece, judge through displacement data that the reaction frame takes place deformation.
According to one aspect of the present invention, a monitoring device is disposed on the reaction frame and/or the existing wall, and monitors in real time whether the reaction frame is deformed into: disposing a monitoring device in the support channel and facing the first right angle support bar; and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change. In this embodiment, the monitoring device may be a laser sensor. So set up, can be so that monitor first right angle bracing piece initial position and take place deformation and produce the position change after the displacement through laser sensor to obtain first right angle bracing piece displacement value, judge through displacement data that reaction frame takes place deformation.
According to one aspect of the present invention, the force transmission construction method using the push pipe reaction frame of the existing station main body structure further includes: when the deformation of the reaction frame is judged, judging whether the deformation exceeds a threshold range, continuing pipe jacking construction when the deformation does not exceed the threshold range, and overhauling or replacing the reaction frame when the deformation does not exceed the threshold range; judging whether the deformation exceeds a threshold range or not, wherein the judging comprises the following steps: and acquiring a data change value generated when the reaction frame deforms by the monitoring device, judging whether the data change value is in the threshold range, judging that the deformation exceeds the threshold range when the data change value is not in the threshold range, and judging that the deformation does not exceed the threshold range when the data change value is in the threshold range. The monitoring device can be a laser sensor, displacement value data generated when the reaction frame deforms are obtained through the laser sensor, whether the displacement value data exceeds a preset threshold range is judged, the threshold range is a data range which can realize normal construction without potential safety hazards or accidents, and therefore if the displacement value data of the reaction frame does not exceed the preset threshold range, the reaction frame can bear the pressure of a jacking pipe, normal construction can be continued, and if the displacement value data exceeds the preset threshold range, maintenance or replacement of construction needs to be suspended, so that the safety and stability of follow-up construction are ensured.
According to the scheme of the invention, the support of the reaction frame can provide enough reverse support force for the existing wall body and the pipe jacking structure supported on the existing wall body on the other side, so that the pipe jacking structure has enough safety and stability in the pipe jacking construction process, is more suitable for construction in a well with a complex structure, ensures the integrity and stability of the structure, and ensures the smooth jacking of the pipe jacking.
According to the scheme of the invention, the deformation information of the reaction frame can be obtained in real time through the arrangement of the monitoring device, whether the construction needs to be continued or not is judged through the deformation information, and the safety of the construction is ensured.
According to the scheme of the invention, the control device and the alarm device which are communicated with the monitoring device can be arranged, so that the monitoring device sends the monitored signals to the control device in real time, the control device carries out calculation processing according to the signals, judges whether to send out a control instruction according to the processing result, and indicates that the reaction frame deforms and the deformation exceeds a threshold range when the control instruction is sent out, and controls the alarm device to alarm. Therefore, constructors can acquire construction condition information in real time, and the overall safety and progress of construction are guaranteed.
Drawings
Fig. 1 schematically shows a flow chart of a force transmission construction method using a top pipe reaction frame of an existing station body structure according to an embodiment of the present invention;
FIG. 2 schematically illustrates a reaction frame support wall structure layout according to one embodiment of the invention;
fig. 3 schematically shows a top view of a reaction frame arrangement according to an embodiment of the invention.
Detailed Description
The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present invention and do not imply any limitation on the scope of the invention.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.
Fig. 1 schematically shows a flow chart of a force transmission construction method using a top pipe reaction frame of an existing station body structure according to an embodiment of the present invention; fig. 2 schematically shows a reaction frame supporting wall structure arrangement according to an embodiment of the invention. As shown in fig. 1 and 2, in the present embodiment, a force transmission construction method using a top pipe reaction frame of an existing station main body structure includes:
a. arranging a supporting groove body on one side of the existing wall body of the jacking pipe starting well, which is away from the jacking pipe;
b. a plurality of reaction frames for supporting the wall body are arranged in the supporting groove body;
c. supporting the jacking pipe on the existing wall body, and running jacking pipe construction;
d. and arranging a monitoring device on the reaction frame and/or the existing wall body, monitoring whether the reaction frame deforms in real time, if not, continuing pipe jacking construction, and if so, suspending pipe jacking construction. By the arrangement, the reaction frame can be stably supported through the supporting groove body on the existing wall body, so that the reaction frame is prevented from reversely shifting in posture on the basis of providing a reaction force on the supporting wall body, and the supporting stability is ensured; moreover, through monitoring devices's setting, can make the deformation information that can acquire the reaction frame in real time, can accurately learn the support of push pipe in the push pipe work progress whether stable through deformation information, whether bearing structure can take place the potential safety hazard, guarantees construction safety and stability in the pit, guarantees going on smoothly of construction.
Further, fig. 3 schematically shows a top view of a reaction frame structure arrangement according to an embodiment of the invention. As shown in fig. 3, in the present embodiment, the reaction frames are arranged in parallel to each other at a distance from each other in the support groove of the existing wall. So set up, can be so that provide balanced even reverse holding power through a plurality of reaction frames, construction installation convenient and fast guarantees the stability and the convenience that the construction supported moreover.
Further, as shown in fig. 2, in the present embodiment, the reaction frame is a right-angle tripod, which is composed of a first right-angle support bar 1, a second right-angle support bar 2, and an inclined bar 3;
the first right-angle support rod 1 is fixedly connected with the support groove body;
the second right-angle support rod 2 is fixedly connected with a bottom support structure (for example, a steel-concrete structure with the bottom serving as a foundation);
the inclined rod 3 is fixedly connected with the first right-angle supporting rod 1 and the second right-angle supporting rod 2. So set up, can be so that promote structural stability through triangle-shaped's design, guarantee more stable firm when providing reverse holding power, with first right angle bracing piece 1 and second right angle bracing piece 2 respectively with wall body and bottom foundation structure fixed connection moreover, can further improve structural stability and bulk strength, effectively promote the security and the stability of push pipe work progress.
Further, in the present embodiment, the length of the first right angle support bar is equal to or less than the length of the second right angle support bar. So set up, can make the support focus through the reaction frame more steady for have more stable supporting strength when supporting through first right-angle bracing piece and providing the counter-force, effectively reduce and avoid even the reaction frame to produce gesture skew or deformation in the push pipe work progress.
Further, as shown in fig. 3, in the present embodiment, a plurality of connection plates 4 are arranged at intervals on both sides of the second right angle support bar 2, and each connection plate 4 is fixedly connected with the bottom support structure by expansion bolts. By the arrangement, the support of the second right-angle support rod 2 can be more stable, the fixed connection area and the fixed connection strength are effectively increased, and the grabbing force is improved.
Further, in this embodiment, a monitoring device is disposed on the reaction frame and/or the existing wall, and whether the reaction frame is deformed is monitored in real time:
disposing the monitoring device on the tilt bar and facing the first right angle support bar and/or the second right angle support bar;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change. In this embodiment, the monitoring device may be a laser sensor. So set up, can be so that monitor the initial position of first right angle bracing piece and/or second right angle bracing piece and take place deformation and produce the position change after the displacement through laser sensor to obtain the displacement value of first right angle bracing piece and/or second right angle bracing piece, judge through displacement data that the reaction frame takes place deformation.
Further, in another embodiment, a monitoring device is disposed on the reaction frame and/or the existing wall, and real-time monitoring is performed to determine whether the reaction frame is deformed into:
disposing a monitoring device in the support channel and facing the first right angle support bar;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change. In this embodiment, the monitoring device may be a laser sensor. So set up, can be so that monitor first right angle bracing piece initial position and take place deformation and produce the position change after the displacement through laser sensor to obtain first right angle bracing piece displacement value, judge through displacement data that reaction frame takes place deformation.
Furthermore, according to an embodiment of the present invention, the force transmission construction method using the top pipe reaction frame of the existing station main body structure further includes: when the deformation of the reaction frame is judged, judging whether the deformation exceeds a threshold range, continuing pipe jacking construction when the deformation does not exceed the threshold range, and overhauling or replacing the reaction frame when the deformation does not exceed the threshold range;
in this embodiment, determining whether the deformation exceeds the threshold range is: and acquiring a data change value generated when the reaction frame deforms by the monitoring device, judging whether the data change value is in the threshold range, judging that the deformation exceeds the threshold range when the data change value is not in the threshold range, and judging that the deformation does not exceed the threshold range when the data change value is in the threshold range. In this embodiment, the monitoring device may be a laser sensor, and the displacement value data generated when the reaction frame deforms is obtained by using the laser sensor, so as to determine whether the displacement value data exceeds a preset threshold range, where the threshold range is a data range capable of realizing normal construction without generating potential safety hazards or accidents, so that if the displacement value data of the reaction frame does not exceed the preset threshold range, it is indicated that the reaction frame can bear the pressure of the jacking pipe, normal construction can be continued, and if the displacement value data exceeds the preset threshold range, construction needs to be paused for maintenance or replacement, so as to ensure the safety and stability of subsequent construction.
In this embodiment, the jacking pipe may be a rectangular jacking pipe or a circular jacking pipe.
According to the scheme of the invention, the support of the reaction frame can provide enough reverse support force for the existing wall body and the pipe jacking structure supported on the existing wall body on the other side, so that the pipe jacking structure has enough safety and stability in the pipe jacking construction process, is more suitable for construction in a well with a complex structure, ensures the integrity and stability of the structure, and ensures the smooth jacking of the pipe jacking.
According to the scheme, the deformation information of the reaction frame can be obtained in real time through the arrangement of the monitoring device, whether the construction needs to be continued or not is judged through the deformation information, and the safety of the construction is ensured.
According to the scheme, the control device and the alarm device which are communicated with the monitoring device can be arranged, so that the monitoring device sends the monitored signals to the control devices in real time, the control devices perform calculation processing according to the signals, judge whether to send out control instructions according to the processing results, and instruct the reaction frame to deform and the deformation exceeds a threshold range when the control instructions are sent out, so that the alarm device is controlled to alarm. Therefore, constructors can acquire construction condition information in real time, and the overall safety and progress of construction are guaranteed.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The force transmission construction method by using the top pipe reaction frame of the existing station main body structure is characterized by comprising the following steps:
arranging a supporting groove body on one side of the existing wall body of the jacking pipe starting well, which is away from the jacking pipe;
a plurality of reaction frames for supporting the wall body are arranged in the supporting groove body;
supporting the jacking pipe on the existing wall body, and running jacking pipe construction;
and arranging a monitoring device on the reaction frame and/or the existing wall body, monitoring whether the reaction frame deforms in real time, if not, continuing pipe jacking construction, and if so, suspending pipe jacking construction.
2. The force transmission construction method using a push bench reaction frame of an existing station main structure according to claim 1, wherein the reaction frames are arranged in parallel with each other and at intervals in a supporting groove of the existing wall body.
3. The force transmission construction method of a jacking pipe reaction frame using an existing station main body structure according to claim 1, wherein the reaction frame is a right-angle tripod, and is composed of a first right-angle support rod, a second right-angle support rod and an inclined rod;
the first right-angle supporting rod is fixedly connected with the supporting groove body;
the second right-angle supporting rod is fixedly connected with the bottom supporting structure;
the inclined rod is fixedly connected with the first right-angle supporting rod and the second right-angle supporting rod.
4. A pipe jacking reaction frame force transmission construction method using an existing station main structure according to claim 3, wherein the length of the first right angle support rod is equal to or smaller than the length of the second right angle support rod.
5. The force transmission construction method of a jacking pipe reaction frame using an existing station main body structure according to claim 3, wherein a plurality of connecting plates are arranged at intervals on two sides of the second right-angle supporting rod, and each connecting plate is fixedly connected with the bottom supporting structure through expansion bolts.
6. A pipe jacking reaction frame force transmission construction method using existing station main structure according to claim 3, characterized in that the monitoring device is arranged on the inclined bar and is arranged facing the first right angle support bar and/or the second right angle support bar;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change.
7. A pipe jacking reaction frame force transmission construction method using existing station main structure according to claim 3, characterized in that the monitoring device is arranged in the supporting groove body and facing the first right-angle supporting rod;
and acquiring the data change acquired by the monitoring device, and judging whether the reaction frame deforms or not through the data change.
8. The force transmission construction method using a push pipe reaction frame of an existing station main structure according to claim 1, further comprising: when the deformation of the reaction frame is judged, judging whether the deformation exceeds a threshold range, continuing pipe jacking construction when the deformation does not exceed the threshold range, and overhauling or replacing the reaction frame when the deformation does not exceed the threshold range;
the judging whether the deformation exceeds a threshold range is as follows: and acquiring a data change value generated when the reaction frame deforms by the monitoring device, judging whether the data change value is in the threshold range, judging that the deformation exceeds the threshold range when the data change value is not in the threshold range, and judging that the deformation does not exceed the threshold range when the data change value is in the threshold range.
9. The force transmission construction method of a jacking pipe reaction frame using an existing station main body structure according to claim 1, wherein the monitoring device is a laser sensor.
10. The force transmission construction method using a push pipe reaction frame of an existing station main structure according to any one of claims 1 to 9, wherein the push pipe is a rectangular push pipe or a circular push pipe.
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| CN202410123396.2A CN117646638A (en) | 2024-01-30 | 2024-01-30 | Force transmission construction method by using top pipe reaction frame of existing station main body structure |
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| CN202410123396.2A CN117646638A (en) | 2024-01-30 | 2024-01-30 | Force transmission construction method by using top pipe reaction frame of existing station main body structure |
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| CN219412584U (en) * | 2022-09-27 | 2023-07-25 | 中国水利水电第五工程局有限公司 | TBM construction reaction frame |
| CN115522950A (en) * | 2022-09-30 | 2022-12-27 | 中国水利水电第四工程局有限公司 | Pipe jacking construction circular cutting type steel blade foot device in soft foundation silt environment |
| CN115823349A (en) * | 2022-10-19 | 2023-03-21 | 中国水利水电第四工程局有限公司 | External circular cutting jacking pipe construction method |
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