CN117823173A - Shell discarding process and machine head for shell discarding process - Google Patents
Shell discarding process and machine head for shell discarding process Download PDFInfo
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- CN117823173A CN117823173A CN202310660822.1A CN202310660822A CN117823173A CN 117823173 A CN117823173 A CN 117823173A CN 202310660822 A CN202310660822 A CN 202310660822A CN 117823173 A CN117823173 A CN 117823173A
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- shell
- machine head
- discarding process
- pipe joint
- driving device
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000008569 process Effects 0.000 title claims abstract description 55
- 239000004567 concrete Substances 0.000 claims abstract description 40
- 238000010276 construction Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 11
- 238000005056 compaction Methods 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 238000007710 freezing Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000004078 waterproofing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000005641 tunneling Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000003712 anti-aging effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application relates to the technical field of pipe jacking engineering, and particularly discloses a shell discarding process and a machine head for the shell discarding process. The shell discarding process comprises the following steps: step one: the concrete prefabricated pipe joint is used for replacing part or all of the machine head steel plate structure, and the cutter head driving device and related components in the machine head are arranged on the machine head through the embedded part; step two: carrying out pipe jacking construction; step three: and removing and recycling the cutterhead and the driving mechanism. A head for the above described shell discarding process, comprising: prefabricating a pipe joint by using concrete; the cutterhead driving device and the machine head assembly mounting frame are arranged at the end part of the concrete prefabricated pipe joint and are detachably connected with the concrete prefabricated pipe joint; the cutter head assembly is arranged at the ends of the cutter head driving device and the machine head assembly mounting frame; and the driving assembly is arranged on the cutterhead driving device and the machine head assembly mounting frame and is used for driving the cutterhead assembly to work. The shell discarding process is simple in construction process, convenient to realize, high in construction efficiency, and capable of reducing waste of machine head steel, reducing construction cost and being beneficial to improving structural compactness and supportability of machine head pipe joints.
Description
Technical Field
The invention relates to the technical field of pipe jacking engineering, in particular to a shell discarding process and a machine head for the shell discarding process.
Background
A pipe jacking engineering is a sub-subject in non-excavation engineering or a non-excavation engineering construction technology, which is a technology for constructing pipelines through auxiliary equipment by adopting non-excavation surface layers and being capable of penetrating roads, railways, river, ground buildings, underground structures, various underground pipelines and the like. The common process has an initial working well and a receiving well, but some special working conditions have no receiving well, so the shell discarding process is utilized to meet the engineering requirements. The machine head shell is used as an outer mold for secondary reinforced concrete lining pouring, but firstly, the machine parts, the cutter head and the driving system in the machine head are removed, then the steel components in the machine shell are treated, and after the process is finished, the structural construction procedures such as steel bar binding, formwork erection, concrete pouring and tamping are carried out.
After the working machine head is jacked into the design mileage and requirements, the driving system, the hinging system, the power disc and the electrical cabinet of the machine head are dismantled, the front chest plate is dismantled, the rib plates in the machine shell are cut off according to the design after the dismantled workpieces are cleared, the binding condition of the reinforcing steel bars is met, the outer shell of the machine is utilized as an outer mold of the structure, the whole process construction of the structure of the box culvert in the machine shell section is complicated, the working procedures are more, the local compactness of concrete is insufficient due to the limitation of the process conditions, the structure quality is influenced, and the whole construction period is longer.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a shell discarding process and a machine head for the shell discarding process, which have the advantage of reducing cost, and solve the problems that the whole process construction is complicated, the working procedures are more, the local compactness of concrete is insufficient due to the limitation of process conditions, the structure quality is influenced, the waste of materials (shell steel plates) is caused, and the whole construction period is longer.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, the present application discloses a shell discarding process comprising the steps of:
step one: the concrete prefabricated pipe joint is used for replacing part or all of the machine head steel plate structure, and the cutter head, the driving device and related components in the machine head are arranged on the machine head through the embedded part;
step two: carrying out pipe jacking construction;
step three: and removing and recycling the cutterhead and the driving mechanism.
Optionally, the shell discarding process further comprises the steps of reinforcing and waterproofing the peripheral soil body.
Optionally, the peripheral soil body is reinforced and waterproof by adopting a freezing method.
Optionally, the well point water-reducing method is adopted to strengthen the surrounding soil body and waterproof construction.
Optionally, the peripheral soil body is reinforced and waterproof by adopting a high-pressure jet grouting pile method.
Optionally, the peripheral soil body is reinforced and waterproof by adopting a compaction grouting method.
Optionally, several combinations of freezing method, well point dewatering method, high-pressure jet grouting pile and compaction grouting method are adopted to strengthen and waterproof the surrounding land.
Optionally, the shell discarding process further comprises the steps of monitoring, measuring and rectifying the position of the machine head in the jacking process of the machine head.
Optionally, the step one further includes: and measuring the structural size of the head steel plate, and preparing the concrete prefabricated pipe joint according to the size of the head, wherein in the preparation process, an embedded part is arranged in advance so as to facilitate the installation of a follow-up cutter head.
Optionally, the jacking pipe construction in the second step includes, but is not limited to, the following steps:
1) Forming a foundation pit (a working well);
2) Measuring and positioning;
3) And (3) equipment installation:
back mounting: forming a back wall, and vertically placing a back steel plate in front of the back wall on the ground;
and (3) guide rail installation: the two guide rails are laid below the pipe jacking path in parallel to limit the jacking direction of the pipeline;
mounting a hydraulic jack bracket: a driving device is arranged on the foundation pit and is used for driving the hydraulic jack bracket; connecting a hydraulic jack bracket with the driving device by adopting a high-pressure oil pipe, and placing the jack bracket between two guide rails for fixing;
4) The heading machine is in place: placing the heading machine on a guide rail in a foundation pit;
5) And (3) positioning the push bench: the rear end of the push bench is propped against the front side of the back steel plate;
6) Pipeline (pipe joint) installation:
hoisting the pipeline (pipe joint) by using a hanging strip, and slowly hoisting the pipeline (pipe joint) to a working platform at the bottom of the foundation pit;
7) Jacking construction:
the pipe jacking tunneling machine is used for tunneling, the tunneling machine cuts and discharges earth and stones in front of the pipe, the pipe is pushed forward along with the tunneling machine, the jacking system of the pipe jacking machine is retracted when the pipe is pushed to a set position, and meanwhile, the tunneling machine stops acting and is used for pipe joint discharging;
8) Repeating the steps 6) and 7) until all the pipelines are jacked in place.
Optionally, the shell discarding process further comprises a process of constructing corrosion resistance and waterproof protection at the joint of the two connected concrete pipe joints.
Optionally, the waterproof material of the joint seam of the pipe joint is an anti-corrosion and anti-aging EPDM elastic rubber sealing strip.
Optionally, the shell discarding process further comprises a process of constructing corrosion-resistant and waterproof protection on the connecting piece holes between the connected beam concrete pipe joints.
Optionally, the waterproof material of the connecting piece hole is an anti-corrosion, anti-aging and water-swelling rubber sealing ring.
In a second aspect, the present application discloses a hand piece for use in the shell discarding process of the first aspect, comprising:
prefabricating a pipe joint by using concrete;
the cutterhead driving device and the machine head assembly mounting frame are arranged at the end part of the concrete prefabricated pipe joint and are detachably connected with the concrete prefabricated pipe joint;
the cutter head assembly is arranged at the ends of the cutter head driving device and the machine head assembly mounting frame; and
and the driving assembly is arranged on the cutterhead driving device and the machine head assembly mounting frame and used for driving the cutterhead assembly to work.
Optionally, the prefabricated tube coupling tip of concrete is provided with the built-in fitting, the prefabricated tube coupling of concrete passes through built-in fitting is connected with blade disc drive arrangement and aircraft nose subassembly mounting bracket can be dismantled.
Optionally, the embedded part is an embedded bolt.
(III) beneficial effects
Compared with the prior art, the invention provides a shell discarding process, which has the following beneficial effects:
1. according to the shell discarding process, the concrete prefabricated pipe joint is used for replacing part or all of the head steel plate structure, so that the manufacturing materials (steel plates) of the shell are saved, and the cost is reduced;
2. according to the shell discarding process, a part or all of the head steel plate structure is replaced by the precast concrete pipe joint, so that the concrete pouring process after pipe jacking construction is omitted, the construction efficiency is improved, and the construction period is shortened;
3. according to the shell discarding process, the prefabricated concrete pipe joint is prepared and formed before construction, so that the compactness of concrete is high, and the structural quality is effectively improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a handpiece for a shell discarding process in a second embodiment of the present application.
Description of the drawings: 1. prefabricating a pipe joint by using concrete; 2. cutter driving device and machine head assembly mounting frame; 3. a cutterhead assembly; 4. a drive assembly; 5. and (5) embedding the parts.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: shell discarding process
The shell discarding process comprises the following steps:
step one: the concrete prefabricated pipe joint is used for replacing part or all of the machine head steel plate structure, and the cutter head is arranged at the end part of the machine head through the embedded part;
step two: carrying out pipe jacking construction;
step three: and removing and recycling the cutterhead and the driving mechanism.
Furthermore, the shell discarding process further comprises the steps of reinforcing and waterproofing the peripheral soil body.
In a first embodiment, the surrounding soil is reinforced and waterproof by freezing.
In a second specific embodiment, the well point water-reducing method is adopted to strengthen and waterproof the surrounding soil body.
In a third specific embodiment, the high-pressure jet grouting pile method is adopted for reinforcing and waterproofing the peripheral soil body.
In a fourth embodiment, the compaction grouting method is used for reinforcing and waterproofing the peripheral soil body.
In other embodiments, the surrounding land is reinforced and waterproof by a combination of freezing, well point dewatering, high pressure jet grouting, and compaction grouting.
Further, the shell discarding process further comprises the steps of monitoring, measuring and rectifying the position of the machine head in the jacking process of the machine head.
Further, the first step further includes: and measuring the structural size of the head steel plate, and preparing the concrete prefabricated pipe joint according to the size of the head, wherein in the preparation process, an embedded part is arranged in advance so as to facilitate the installation of a follow-up cutter head.
Further, the pipe jacking construction in the second step includes, but is not limited to, the following steps:
1) Forming a foundation pit (a working well);
2) Measuring and positioning;
3) And (3) equipment installation:
back mounting: forming a back wall, and vertically placing a back steel plate in front of the back wall on the ground;
and (3) guide rail installation: the two guide rails are laid below the pipe jacking path in parallel to limit the jacking direction of the pipeline;
mounting a hydraulic jack bracket: a driving device is arranged on the foundation pit and is used for driving the hydraulic jack bracket; connecting a hydraulic jack bracket with the driving device by adopting a high-pressure oil pipe, and placing the jack bracket between two guide rails for fixing;
4) The heading machine is in place: placing the heading machine on a guide rail in a foundation pit;
5) And (3) positioning the push bench: the rear end of the push bench is propped against the front side of the back steel plate;
6) Pipeline (pipe joint) installation:
hoisting the pipeline (pipe joint) by using a hanging strip, and slowly hoisting the pipeline (pipe joint) to a working platform at the bottom of the foundation pit;
7) Jacking construction:
the pipe jacking tunneling machine is used for tunneling, the tunneling machine cuts and discharges earth and stones in front of the pipe, the pipe is pushed forward along with the tunneling machine, the jacking system of the pipe jacking machine is retracted when the pipe is pushed to a set position, and meanwhile, the tunneling machine stops acting and is used for pipe joint discharging;
8) Repeating the steps 6) and 7) until all the pipelines are jacked in place.
Furthermore, the shell discarding process further comprises the process of constructing corrosion resistance and waterproof protection at the joint of the two connected concrete pipe joints.
Further, the waterproof material of the joint seam of the pipe joint is an anti-corrosion and anti-aging EPDM elastic rubber sealing strip.
Further, the shell discarding process further comprises the process of constructing corrosion resistance and waterproof protection on the connecting piece holes between the connected beam concrete pipe joints.
Furthermore, the waterproof material of the connecting piece hole is an anti-corrosion and anti-aging water-swelling rubber sealing ring.
The beneficial effects of the invention are as follows: 1. according to the shell discarding process, the concrete prefabricated pipe joint is used for replacing part or all of the head steel plate structure, so that the manufacturing materials (steel plates) of the shell are saved, and the cost is reduced; according to the shell discarding process, a part or all of the head steel plate structure is replaced by the precast concrete pipe joint, so that the concrete pouring process after pipe jacking construction is omitted, and the construction efficiency is improved; according to the shell discarding process, the prefabricated concrete pipe joint is prepared and formed before construction, so that the compactness of concrete is high, and the structural quality is effectively improved.
Embodiment two: handpiece for shell discarding process of embodiment one
A handpiece, comprising:
a concrete prefabricated pipe joint 1;
the cutterhead driving device and the machine head assembly mounting frame 2 are arranged at the end part of the concrete prefabricated pipe joint 1 and are detachably connected with the concrete prefabricated pipe joint 1;
the cutter head assembly 3 is arranged at the end parts of the cutter head driving device and the machine head assembly mounting frame 2; and
and the driving assembly 4 is arranged on the cutterhead driving device and the machine head assembly mounting frame 2 and is used for driving the cutterhead assembly 3 to work.
Further, an embedded part 5 is arranged at the end part of the concrete prefabricated pipe joint 1, and the concrete prefabricated pipe joint 1 is detachably connected with the cutterhead driving device and the machine head assembly mounting frame 2 through the embedded part 5.
Further, the embedded part 5 is an embedded bolt.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The shell discarding process is characterized by comprising the following steps of:
step one: the concrete prefabricated pipe joint is used for replacing part or all of the machine head steel plate structure, and the cutter head driving device and related components in the machine head are arranged on the machine head through the embedded part;
step two: carrying out pipe jacking construction;
step three: and removing and recycling the cutterhead and the driving mechanism.
2. The shell discarding process according to claim 1, further comprising the step of reinforcing and waterproofing the surrounding soil mass.
3. The shell discarding process according to claim 2, wherein the surrounding land is reinforced and waterproof by one or more of freezing, well point dewatering, high pressure jet grouting, and compaction grouting.
4. The shell discarding process according to claim 1, further comprising the step of monitoring, measuring, and correcting the position of the head during its jacking.
5. A head for use in the shell discarding process according to any one of claims 1 to 4, comprising:
prefabricating a pipe joint by using concrete;
the cutterhead driving device and the machine head assembly mounting frame are arranged at the end part of the concrete prefabricated pipe joint and are detachably connected with the concrete prefabricated pipe joint;
the cutter head assembly is arranged at the ends of the cutter head driving device and the machine head assembly mounting frame; and
and the driving assembly is arranged on the cutterhead driving device and the machine head assembly mounting frame and used for driving the cutterhead assembly to work.
6. The machine head according to claim 5, wherein an embedded part is arranged at the end part of the concrete prefabricated pipe joint, and the concrete prefabricated pipe joint is detachably connected with the cutter head driving device and the machine head assembly mounting frame through the embedded part.
7. The head of claim 6, wherein the embedment is an embedment bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310660822.1A CN117823173A (en) | 2023-06-06 | 2023-06-06 | Shell discarding process and machine head for shell discarding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310660822.1A CN117823173A (en) | 2023-06-06 | 2023-06-06 | Shell discarding process and machine head for shell discarding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117823173A true CN117823173A (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310660822.1A Pending CN117823173A (en) | 2023-06-06 | 2023-06-06 | Shell discarding process and machine head for shell discarding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117823173A (en) |
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2023
- 2023-06-06 CN CN202310660822.1A patent/CN117823173A/en active Pending
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