CN219974501U - Step type shield device and construction shield system - Google Patents
Step type shield device and construction shield system Download PDFInfo
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- CN219974501U CN219974501U CN202321211306.2U CN202321211306U CN219974501U CN 219974501 U CN219974501 U CN 219974501U CN 202321211306 U CN202321211306 U CN 202321211306U CN 219974501 U CN219974501 U CN 219974501U
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000009412 basement excavation Methods 0.000 claims abstract description 52
- 239000002689 soil Substances 0.000 claims abstract description 13
- 238000005192 partition Methods 0.000 claims description 24
- 239000011150 reinforced concrete Substances 0.000 claims description 14
- 239000011435 rock Substances 0.000 claims description 13
- 238000011161 development Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 9
- 230000005641 tunneling Effects 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 30
- 230000008569 process Effects 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model belongs to the technical field of shield construction, in particular to a step type shield device and a construction shield system, which are suitable for the technical requirements of full-section mechanical excavation, effectively solve the technical problems of low construction efficiency and high construction safety risk in the traditional step method construction process, effectively improve the working environment in the tunnel step method construction process, provide the step type shield device, and comprise a device body, wherein a tail shield is arranged at the rear part of the device body, a telescopic front shield structure is arranged at the front part of the device body, the telescopic front shield structure is spliced with a soil excavation surface in front of the shield, the advanced support is carried out on the excavation surface, and the step type shield excavation device is arranged in the device body.
Description
Technical Field
The utility model belongs to the technical field of shield construction; in particular to a step type shield device and a construction shield system.
Background
The construction of the step method is one of the construction methods of the tunnel and the underground engineering, and the construction method is divided into a positive step method and a reverse step method, and the reverse step method is also called a middle wall step method. There are three kinds of steps, long step, short step and ultrashort step according to the step length. In recent years, due to the design of large-section tunnels, a three-step temporary inverted arch method is adopted, a core soil step method is reserved, and even a multi-step method is adopted. In the construction process of the step method, particularly in the construction of rock stratum with poor stability, the section of the whole tunnel is divided into a plurality of layers, excavation is carried out from top to bottom, and the front-back distance of the excavation surface of each layer is smaller to form a plurality of steps. However, in the prior art, there is no relevant reliable full-section mechanical excavating device, and there are technical problems of poor construction operation environment, low construction efficiency, high construction operation safety risk and high construction cost in the conventional construction process, so it is very necessary to provide a brand new step type shield device and a construction shield system thereof, which are suitable for full-section mechanical excavation, aiming at the technical problems of the conventional tunnel step method construction.
Disclosure of Invention
The utility model aims at:
the utility model provides a be applicable to step shield structure device and construction shield system of full section mechanical type excavation, not only effectual solution traditional step method in-process efficiency of construction is low, the great technical problem of construction safety risk, and the operating environment in the tunnel step method in-process is effectively improved moreover, very big reduction construction safety operation risk, simultaneously effectual assurance equipment is to the adaptability of shield stratum.
The technical scheme of the utility model is as follows:
the utility model provides a step shield constructs device, including the device body, be provided with the tail shield at the rear portion of device body, be provided with telescopic front shield structure in the front portion of device body, telescopic front shield structure is pegged graft mutually with shield the preceding soil body excavation face, carries out advance support to the excavation face, is provided with step shield excavation device in the inside of device body.
The telescopic front shield structure comprises a front shield body, a plurality of pushing sliding grooves are formed in the front shield body, pushing sliding blocks matched with the pushing sliding grooves are arranged in the pushing sliding grooves, plug-in pushing unit bodies are arranged on the pushing sliding blocks, and a pushing power device is connected to the pushing sliding blocks.
The plug-in propulsion unit body is a rigid structural plate, and the propulsion power device is a hydraulic cylinder or a pneumatic cylinder.
The step type shield excavation device comprises a middle partition plate arranged inside the device body, wherein the middle partition plate adopts a layered suspension structure inside the device body and is detachably connected with the device body, a cantilever development machine is arranged on the middle partition plate, and the cantilever development machine carries out layered excavation on an excavation section.
The middle partition board is at least arranged into a two-layer structure in the device body, the cantilever development machine arranged on the middle partition board is of a step type layered excavation soil body structure, the cantilever development machines are at least arranged into 1, and the excavation section is not more than 1.5 times of the tunnel excavation width.
The rear parts of the cantilever heading machines are respectively connected with a muck conveying device.
The dregs conveying device adopts a scraper conveyor.
The step type shield excavation device adopts a rock drilling trolley device.
The step type shield excavation device adopts a movable cantilever tunneling machine, and a dregs conveying device is arranged behind the movable cantilever tunneling machine.
A construction shield system comprising the stepped shield apparatus of any one of the above, further comprising:
the reinforced concrete pipe piece is used as an excavation tunnel supporting structure of a construction shield system;
the reinforced concrete pipe piece splicing machine is arranged in the device body and is used for rapid construction and splicing of reinforced concrete pipe pieces;
the pushing oil cylinder group is arranged in the device body and detachably connected with the device body, is matched with the reinforced concrete pipe sheet and is used for pushing the movable step type shield device to excavate and tunnel along the tunnel excavation direction.
The beneficial effects of the utility model are as follows:
this novel structural design's step shield structure device and construction shield system suitable for full section mechanical type excavation not only effectually solved the low technical problem of efficiency of construction in the traditional step method work progress, construction safety risk is big, and the effectual operational environment who improves in the tunnel step method work progress moreover, very big reduction construction safety operation risk, simultaneously effectually guaranteed the adaptability of equipment to shield stratum.
Drawings
FIG. 1 is a schematic diagram of a front view of a step shield apparatus and a construction shield system according to the present utility model;
FIG. 2 is a schematic view of a retractable front shield structure according to the present utility model;
FIG. 3 is a schematic side view of the construction shield system and the step shield apparatus of the present utility model;
FIG. 4 is a schematic diagram II of a front view structure of the step shield apparatus and the construction shield system of the present utility model;
fig. 5 is a schematic diagram of a front view structure of the step shield apparatus and the construction shield system according to the present utility model.
In the figure; 1 is a device body; 2 is a tail shield; 3 is a telescopic front shield structure; 4 is a step type shield excavation device; 5 is a front shield body; 6 is a pushing chute; 7 is a pushing slide block; 8 is a propulsion unit body; 9 is a propulsion power device; 10 is a middle separator; 11 is a cantilever heading machine; 12 is a slag conveying device; 13 is a drill jumbo device; 14 is a mobile cantilever heading machine; 15 is a reinforced concrete segment; 16 is a reinforced concrete pipe piece assembling machine; 17 is a propulsion cylinder group, and 18 is a transport mechanism.
Detailed Description
The following detailed description of specific embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1 to 5, there is provided a step shield apparatus, which is mainly a technical innovation of a conventional tunnel constructed by adopting a step method, and is suitable for a full-face mechanical excavation, and the step shield apparatus can adopt an open shield structure, and comprises an apparatus body 1, a tail shield 2 is arranged at the rear part of the apparatus body, a retractable front shield structure 3 is arranged at the front part of the apparatus body, the retractable front shield structure is spliced with a soil excavation face in front of the shield, advanced support is performed on the excavation face, and a step shield excavation device 4 is arranged in the apparatus body.
Preferably, the telescopic front shield structure comprises a front shield body 5, a plurality of propulsion sliding grooves 6 are arranged on the front shield body, propulsion sliding blocks 7 matched with the propulsion sliding grooves are arranged in the propulsion sliding grooves, plug-in propulsion unit bodies 8 are arranged on the propulsion sliding blocks, and propulsion power devices 9 are connected on the propulsion sliding blocks; the telescopic front shield structure is mainly used for making advanced support on a face to be excavated, a stepped shield structure is formed in a specific construction process, the engineering technical problem that the face is easy to collapse is greatly avoided, a combined structure for propelling a spliced soil body by power can be adopted in the design process, propelling power is provided by a propelling power device and acts on a propelling sliding block, the propelling sliding block drives the spliced propelling unit body to be inserted into the soil body in front along a designated path in the propelling sliding groove, so that a supporting structure is formed, in the structural design of the spliced propelling unit body, an integral or block type structural configuration can be adopted, the front end of the propelling unit body is provided with a cutting edge structure, when the integral type structural design is adopted, the propelling sliding block needs to be uniformly distributed on an integral structural section, the uniform stress of the propelling unit body in the propelling process is ensured, and when the block type structural design is adopted, the propelling unit body is designed by adopting a block type structure, the propelling power device and the propelling sliding block structure are arranged on each block type unit body, and synchronous propelling or up-down orderly propelling of the block type structure is ensured.
Preferably, the plug-in propulsion unit body is a rigid structural plate, and can be made of carbon structural steel or alloy structural steel, and also can be made of high polymer materials with long service life and good corrosion resistance, and the propulsion power device can be preferably a hydraulic cylinder or a pneumatic cylinder.
Preferably, the step shield excavation device comprises a middle partition board 10 arranged inside a device body, the middle partition board can be welded and assembled by adopting structural rigidity materials to form a middle partition board rack structure, the middle partition board adopts a layered suspension structure inside the device body and is detachably connected with the device body in order to meet specific construction requirements of a step method, a rigid bolt can be adopted to be connected with the device body in the detachable connection process, a cantilever excavator 11 is arranged on the middle partition board, the cantilever excavator adopts a traditional cantilever excavator structure, due to the loading support of the middle partition board or the middle partition board rack, a travelling mechanism in the traditional cantilever excavator structure can be omitted, a cutting mechanism, a loading mechanism, a conveying mechanism 18, a frame and a rotary table, a hydraulic system, an electric system, a cooling dust suppression water supply system and an operation control system of the cantilever excavator are integrated on the middle partition board or the middle partition board rack, the cantilever excavator frame is detachably and rigidly connected with the middle partition board or the middle partition board rack, and the cantilever excavator excavates the partition section in a layered manner in the construction process of the device body.
Preferably, the middle partition plate is at least arranged into a two-layer structure in the device body, and can also be arranged into a three-layer or four-layer structure, the cantilever tunneling machine arranged on the middle partition plate is of a step type layered excavation soil body structure, the cantilever tunneling machine is at least arranged into 1 or more than 1, the excavation step section depth is determined according to the excavation face width and surrounding rock grade of a specific tunnel, and the excavation section is not more than 1.5 times of the tunnel excavation width.
Preferably, in order to ensure the mechanical conveying and carrying-out of the excavated dregs, the rear parts of the cantilever development machines are respectively connected with a dregs conveying device 12, and the dregs excavated by the cantilever development machines are conveyed to the dregs conveying devices arranged at the rear parts of the cantilever development machines through dregs loading plates and conveyors arranged in the cantilever development machines, so that the excavated dregs are conveyed outside the tunnel efficiently and quickly.
Preferably, the muck conveying equipment adopts a scraper conveyor.
Preferably, when the stability of surrounding rocks of an excavated stratum is good and the rock strength of an excavated surface is high, the step type shield excavation device adopts a rock drilling trolley device 13, and adopts the rock drilling trolley to conduct layered excavation, and the rock drilling trolley is also called a drilling trolley. Is a rock drilling device for tunnel and underground engineering construction by adopting a drilling and blasting method. It can move and support a plurality of rock drills to drill holes simultaneously. The layered drilling and blasting and layered excavation of the construction tunnel are mainly carried out by a rock drill, a drill boom (a bearing, positioning and propelling mechanism of the rock drill), a frame of a steel structure, a running mechanism and other necessary auxiliary equipment.
Preferably, the step type shield excavation device adopts a movable cantilever tunneling machine 14, a land disc and a traveling device of a traditional tunnel cantilever tunneling machine are additionally arranged, and a dregs conveying device is arranged behind the movable cantilever tunneling machine.
Preferably, a construction shield system is also designed, including the step shield device of any one of the above, further including:
a reinforced concrete segment 15 as an excavated tunnel supporting structure of a construction shield system;
the reinforced concrete pipe piece splicing machine 16 is arranged inside the device body and is used for rapid construction and splicing of reinforced concrete pipe pieces;
the pushing oil cylinder group 17 is arranged in the device body and detachably connected with the device body, is matched with the reinforced concrete pipe sheet and is used for pushing the movable step type shield device to excavate and tunnel along the tunnel excavation direction.
In a specific construction process, the specific steps of the construction are as follows:
s1, pushing the open shield machine into the soil body through a pushing oil cylinder at an originating hole;
s2, excavating soil by the front cantilever heading machine under the protection of a front shield and a cap peak of the slotting tool;
s3, conveying excavated muck out of the muck carrier vehicle through the scraper conveyor after the soil body is excavated;
s4, after the excavation depth meets the segment assembly size, pushing the oil cylinder to push the shield machine so that the shield tail leaves a segment assembly operation space;
s5, splicing the precast concrete segments by a splicing machine to form a supporting structure of the tunnel;
s6, finally, continuously excavating after the whole ring assembly is completed, and propelling the device body machine through a propelling oil cylinder;
repeating the steps until the tunnel is penetrated.
The present utility model is not limited to the conventional technical means known to those skilled in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a step shield constructs device, includes the device body, is provided with tail shield, its characterized in that at the rear portion of device body: the front part of the device body is provided with a telescopic front shield structure, the telescopic front shield structure is spliced with the soil excavation surface in front of the shield, advanced support is carried out on the excavation surface, and a stepped shield excavation device is arranged in the device body.
2. The step shield apparatus of claim 1, wherein: the telescopic front shield structure comprises a front shield body, a plurality of pushing sliding grooves are formed in the front shield body, pushing sliding blocks matched with the pushing sliding grooves are arranged in the pushing sliding grooves, plug-in pushing unit bodies are arranged on the pushing sliding blocks, and a pushing power device is connected to the pushing sliding blocks.
3. The step shield apparatus of claim 2, wherein: the plug-in propulsion unit body is a rigid structural plate, and the propulsion power device is a hydraulic cylinder or a pneumatic cylinder.
4. A stepped shield apparatus according to any one of claims 1 to 3, wherein: the step type shield excavation device comprises a middle partition plate arranged inside the device body, wherein the middle partition plate adopts a layered suspension structure inside the device body and is detachably connected with the device body, a cantilever development machine is arranged on the middle partition plate, and the cantilever development machine carries out layered excavation on an excavation section.
5. The step shield apparatus of claim 4, wherein: the middle partition board is at least arranged into a two-layer structure in the device body, the cantilever development machine arranged on the middle partition board is of a step type layered excavation soil body structure, the cantilever development machines are at least arranged into 1, and the excavation section is not more than 1.5 times of the tunnel excavation width.
6. The stepped shield apparatus of claim 4 or 5, wherein: the rear parts of the cantilever heading machines are respectively connected with a muck conveying device.
7. The step shield apparatus of claim 6, wherein: the dregs conveying device adopts a scraper conveyor.
8. A stepped shield apparatus according to any one of claims 1 to 3, wherein: the step type shield excavation device adopts a rock drilling trolley device.
9. A stepped shield apparatus according to any one of claims 1 to 3, wherein: the step type shield excavation device adopts a movable cantilever tunneling machine, and a dregs conveying device is arranged behind the movable cantilever tunneling machine.
10. A construction shield system comprising the stepped shield apparatus of any one of claims 1 to 9, further comprising:
the reinforced concrete pipe piece is used as an excavation tunnel supporting structure of a construction shield system;
the reinforced concrete pipe piece splicing machine is arranged in the device body and is used for rapid construction and splicing of reinforced concrete pipe pieces;
the pushing oil cylinder group is arranged in the device body and detachably connected with the device body, is matched with the reinforced concrete pipe sheet and is used for pushing the movable step type shield device to excavate and tunnel along the tunnel excavation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321211306.2U CN219974501U (en) | 2023-05-19 | 2023-05-19 | Step type shield device and construction shield system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321211306.2U CN219974501U (en) | 2023-05-19 | 2023-05-19 | Step type shield device and construction shield system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974501U true CN219974501U (en) | 2023-11-07 |
Family
ID=88597792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321211306.2U Active CN219974501U (en) | 2023-05-19 | 2023-05-19 | Step type shield device and construction shield system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974501U (en) |
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2023
- 2023-05-19 CN CN202321211306.2U patent/CN219974501U/en active Active
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