CN114961749A - Telescopic buckle cover type shield end opening chiseling emergency device and construction method - Google Patents
Telescopic buckle cover type shield end opening chiseling emergency device and construction method Download PDFInfo
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- CN114961749A CN114961749A CN202210913201.5A CN202210913201A CN114961749A CN 114961749 A CN114961749 A CN 114961749A CN 202210913201 A CN202210913201 A CN 202210913201A CN 114961749 A CN114961749 A CN 114961749A
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 238000007789 sealing Methods 0.000 claims description 42
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/122—Working or loading platforms
-
- 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
- E21F17/103—Dams, e.g. for ventilation
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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
- E21F17/103—Dams, e.g. for ventilation
- E21F17/107—Dams, e.g. for ventilation inflatable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a telescopic buckle type shield end opening chiseling emergency device and a construction method thereof. According to the invention, the emergency device is arranged at the tunnel opening of the shield end, tunnel opening chiseling operation is carried out under normal conditions, and when an emergency accident occurs, the emergency device is closed to further close the tunnel opening, so that the effects of limiting the accident scale and further expanding are achieved, and the safety of the construction process and the safety of personnel are ensured.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a telescopic cover type shield end opening chiseling emergency device and a construction method.
Background
With the development of urban and rural construction, the application of the shield method in the construction field of tunnels and underground engineering is more and more common. Although the shield construction method is safer than other construction methods of tunnels and underground engineering, shield launching and receiving are the most risky stages in shield construction, and still have great potential safety hazards. According to statistics, about 70% of accidents occur in the originating or receiving stage of the shield machine in the shield construction.
The shield starting and receiving tunnel portal enclosure structure has a supporting function on the stratum at the tunnel portal position and has a sealing function on water and soil in the stratum, but the shield starting and receiving construction of the shield machine needs to chiseling the shield tunnel portal enclosure structure, so that the supporting function and the sealing function of the enclosure structure are damaged, and tunnel portal chiseling operation becomes the largest operation link in the shield starting and receiving stage.
Before a shield opening is chiseled, an end soil body needs to be pre-reinforced, but the quality of the opening reinforcement can be discrete to a certain degree due to the restriction of factors such as hydrology and geological conditions, construction technology and operation environment. When the stratum at the position of the cave mouth contains water and sand, accidents of water burst, sand burst and ground collapse at the cave mouth are easily caused in the chiseling process of the cave mouth of the shield, and because the cave mouth of the shield is positioned at the bottom of the shield working well and is positioned in an open space, substances such as water, sand and soil burst from the cave mouth can flow in the working well without being restricted, a large amount of water and soil loss of the stratum at the cave mouth is caused, the ground collapse is caused, the shield working well can be submerged under extreme conditions, and the shield machine is submerged, so that casualties and property loss are caused.
Therefore, the tunnel portal chiseling operation is used as the operation link with the largest shield construction risk, and once accidents such as water burst, sand burst, collapse and the like occur in the tunnel portal chiseling process, the construction progress can be influenced, casualties can be caused in severe cases, but the current industry does not have the measures for rapidly stabilizing the accident situation, controlling the scale development of the accident and reducing the accident loss. The invention provides a telescopic buckle type shield end opening chiseling emergency device and a construction method.
Disclosure of Invention
The invention provides a telescopic buckle type shield end opening chiseling emergency device and a construction method, which are used for chiseling construction operation of a shield end opening, play an emergency role in accidents and guarantee construction safety.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a telescopic buckle cover type shield end opening chiseling emergency device comprises a fixed shell, a telescopic structure, a sealing structure and an auxiliary structure, wherein the fixed shell is arranged at a shield opening and is reserved with a shield opening structure end wall, the telescopic shell is arranged in the fixed shell, the telescopic structure is arranged in the fixed shell and is connected with the telescopic shell, the sealing structure is arranged at the rear end of the fixed shell and the rear end of the telescopic shell, and the auxiliary structure is connected with the fixed shell, the telescopic structure and the sealing structure;
the sealing structure arranged at the rear end of the fixed shell is positioned in a gap between the fixed shell and the telescopic shell, and when the telescopic shell extends out, the sealing structure arranged at the rear end of the telescopic shell is contacted with the end wall of the shield tunnel portal structure.
Furthermore, the fixed shell and the telescopic shell are both circular shells, the fixed shell comprises an end cover and a shell, the end cover is arranged at the front end of the shell, and the telescopic shell is arranged in the shell;
the rear end of shell is equipped with the inner flange, the tip all is equipped with the outer flange around the flexible casing, and the outer flange of establishing at flexible casing front end is located the shell to be located the front side of inner flange, establish outside the outer flange of flexible casing rear end is located the shell, seal structure establishes on the inner flange, is located between the outer flange of inner flange and flexible casing front end.
Furthermore, the telescopic structure is circumferentially arranged in the shell, and a telescopic end of the telescopic structure is connected to an outer flange at the front end of the telescopic shell; the telescopic shell is characterized in that an annular groove is formed in an outer flange at the rear end of the telescopic shell, the annular groove is formed in the rear side of the outer flange, and the sealing structure is arranged in the annular groove.
Further, the auxiliary structure includes bracing, water injection device, power device, operation panel and connects the flitch, the bracing is connected and is being shielded the structure and receive between well and the end cover, water injection device connects on the shell to be connected with power device and operation panel, the operation panel is located outside the fixed casing, extending structure and seal structure all are connected with power device and operation panel, connect the flitch to establish in the extending shell.
Furthermore, the material receiving plate comprises an arc-shaped plate and a moving wheel, the moving wheel is arranged on the bottom surface of the arc-shaped plate, and the arc-shaped plate is connected to the inner wall of the telescopic shell through the moving wheel and moves back and forth along the axial direction of the telescopic shell.
Furthermore, the outer diameter of the arc-shaped plate is the same as the inner diameter of the steel ring at the shield opening, and the rear end of the arc-shaped plate is detachably connected to the steel ring at the shield opening.
Further, the sealing structure is an annular inflatable air bag, and the pressure resistance is 0.5 Mpa.
Further, the inner diameter of the fixed shell is 400-300 mm larger than that of the steel ring at the shield hole opening, and the inner diameter of the telescopic shell is 100-300mm smaller than that of the fixed shell.
Furthermore, the lower part of the inner flange is mutually overlapped with the upper part of the outer flange at the front end of the telescopic shell, and the overlapping length is 70-90 mm.
A construction method for chiseling an emergency device at a tunnel opening of a telescopic buckle cover type shield end comprises the following steps:
s1, equipment assembly: assembling equipment at the shield tunnel portal, and debugging and commissioning after the assembling is finished;
s2, erecting a working frame: retracting the telescopic shell into the shell, extending the material receiving plate out of the telescopic shell, hinging the rear end of the material receiving plate on a steel ring at the opening of the shield tunnel, and then erecting a working frame on the material receiving plate to carry out opening chiseling construction;
s3, emergency operation: when water burst, sand burst and collapse trends or accidents occur at the cave entrance in the construction process, construction personnel withdraw from the working frame, the telescopic structure is controlled to extend out through the operating platform, the telescopic shell is pushed out from the shell until the rear end of the telescopic shell is contacted with the end wall of the shield cave entrance structure, and the fixed shell, the telescopic shell and the end wall of the shield cave entrance structure form a closed space;
s4, inflating and sealing: the sealing structure is controlled to inflate through the operating console, and a gap between the fixed shell and the telescopic shell and a gap between the telescopic shell and the end wall of the shield tunnel portal structure are sealed and plugged, so that a sealed cavity space is formed among the fixed shell, the telescopic shell and the end wall of the shield tunnel portal structure;
s5, pressurization balance: controlling a water injection device to inject water into the cavity space through the operation table until the water pressure in the cavity space is balanced with the water and soil pressure of the stratum at the position of the hole;
s6, dangerous case disposal: the method comprises the following steps of treating a dangerous case at the position of a hole by adopting grouting reinforcement and water stop measures in the ground, a shield tunnel or a shield body, discharging water in a cavity space after the dangerous case is eliminated, deflating a sealing structure, and retracting a telescopic shell into a shell;
s7, construction recovery: after the cavity space is cleaned, the constructor continues to perform hole chiseling operation on the working frame;
s8, shield starting receiving: and after the tunnel opening is chiseled, the emergency device is removed, and subsequent shield machine starting or receiving operation is carried out.
The invention has the following beneficial effects:
the emergency device is arranged at the tunnel portal of the shield end, tunnel portal chiseling operation is carried out under normal conditions, and when an emergency accident occurs, the emergency device is sealed to seal the tunnel portal, so that the effects of limiting the scale of the accident and further expanding are achieved, and the safety of the construction process and the safety of personnel are ensured;
emergency device can be normal carry out the entrance to a cave chisel and remove the construction in normal conditions, does not influence the progress of entrance to a cave chisel and remove the operation and normally impels, also need not to set up extra structure equally, directly plays the effect of restriction accident development when emergence emergency accident, has both guaranteed the normal clear of construction, also can play safety protection's effect.
Drawings
FIG. 1 is a schematic view of the present invention in a normal construction state;
FIG. 2 is an enlarged view of the part A of FIG. 1;
FIG. 3 is a schematic view of an emergency state of the present invention;
FIG. 4 is an enlarged view of the portion B of FIG. 3;
FIG. 5 is a schematic view of the telescoping housing of the present invention in an extended position;
FIG. 6 is an exploded view of the fixed housing and the retractable housing of the present invention;
FIG. 7 is a schematic view of the setting state of the telescopic structure of the present invention;
FIG. 8 is an enlarged view of the structure of the portion C in FIG. 7;
FIG. 9 is a schematic view of the arrangement of the receiving plate according to the present invention;
FIG. 10 is a side view of a receiver plate of the present invention;
fig. 11 is a schematic front view of a receiving plate of the present invention.
Reference numerals: 1-fixed shell, 11-end cover, 12-shell, 121-inner flange, 2-telescopic shell, 21-outer flange, 22-annular groove, 3-telescopic structure, 4-sealing structure, 5-auxiliary structure, 51-inclined strut, 52-water injection device, 53-material receiving plate, 531-arc plate and 532-moving wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1 and 3, the emergency device for chiseling a shield end opening comprises a fixed shell 1, a telescopic shell 2, a telescopic structure 3, a sealing structure 4 and an auxiliary structure 5, wherein the fixed shell 1 is arranged at the shield opening and is reserved with a space between the end wall of the shield opening structure, the telescopic shell 2 is arranged in the fixed shell 1, the telescopic structure 3 is arranged in the fixed shell 1 and is connected with the telescopic shell 2, the sealing structure 4 is arranged at the rear end of the fixed shell 1 and the rear end of the telescopic shell 2, and the auxiliary structure 5 is connected with the fixed shell 1, the telescopic structure 3 and the sealing structure 4;
as shown in fig. 2 and 4, the sealing structures 4 are two, one sealing structure 4 is arranged at the rear end of the fixed casing 1 and is located in the gap between the fixed casing 1 and the telescopic casing 2, the other sealing structure 4 is arranged at the rear end of the telescopic casing 2, when the telescopic casing 2 extends out, the sealing structure 4 arranged at the rear end of the telescopic casing 2 is in contact with the end wall of the shield tunnel portal structure, and the two sealing structures 4 seal the front end and the rear end of the telescopic casing 2, so that a closed space is formed.
As shown in fig. 1, 2, 3 and 4, the principle of the invention is as follows: the fixed shell 1 is fixedly supported at the shield tunnel portal and is supported and fixed, so that the stability of the state of the fixed shell is guaranteed, the fixed shell serves as an installation foundation for other components, and the stability of the fixed shell can also guarantee that the fixed shell can play a role in stable and safe support when an accident occurs; the flexible setting of flexible casing 2 is in fixed casing 1, when normally chiseling the operation, flexible casing 2 is in the contraction state, the operation personnel chisels the operation on the working frame, when taking place emergent accident, personnel promptly withdraw, and stretch out flexible casing 2 and seal the reservation interval between fixed casing 1 and the shield opening of a cave structure headwall, and sealed formation seal chamber space, then water injection equilibrium pressure stabilizes the surrounding environment in the cavity, avoid the further development of accident to enlarge, then carry out incident treatment, in the clearance cavity after the processing is accomplished, and continue to chiseling the operation. Utilize the confined space who has firm supporting effect that fixed casing 1 and flexible casing 2 formed to restrict the accident, restriction construction development reduces accident hazard, reduces the cost-push because of the accident leads to.
As shown in fig. 5 and 6, further, the fixed casing 1 and the telescopic casing 2 are both circular casings, the fixed casing 1 includes an end cover 11 and a casing 12, the end cover 11 is disposed at the front end of the casing 12, and the telescopic casing 2 is disposed in the casing 12.
Preferably, the outer shell 12 and the telescopic shell 2 both comprise shells and reinforcing ribs, and the reinforcing ribs are circumferential and longitudinal reinforcing ribs; the shell is a Q235 steel plate with the thickness of 20 mm.
As shown in fig. 2 and 4, an inner flange 121 is disposed at the rear end of the housing 12, outer flanges 21 are disposed at the front and rear ends of the telescopic housing 2, the outer flange 21 disposed at the front end of the telescopic housing 2 is located in the housing 12 and located at the front side of the inner flange 121, the outer flange 21 disposed at the rear end of the telescopic housing 2 is located outside the housing 12, and the sealing structure 4 is disposed on the inner flange 121 and located between the inner flange 121 and the outer flange 21 at the front end of the telescopic housing 2.
Preferably, the inner flange 121 is an annular steel plate having a thickness of 40mm and a width of 100mm, and the outer flange 21 is an annular steel plate having a thickness of 40mm and a width of 100 mm.
As shown in fig. 7 and 8, further, the telescopic structures 3 are circumferentially arranged in the outer shell 12, 4 are uniformly arranged at intervals, and the telescopic ends of the telescopic structures 3 are connected to the outer flange 21 at the front end of the telescopic shell 2; an annular groove 22 is formed in an outer flange 21 at the rear end of the telescopic shell 2, the annular groove 22 is formed in the rear side of the outer flange 21, and the sealing structure 4 is arranged in the annular groove 22. The telescopic structure 3 is used for controlling the telescopic shell 2 to stretch, and the annular groove 22 is used for placing the sealing structure 4.
As shown in fig. 1 and 2, further, the auxiliary structure 5 includes an inclined strut 51, a water injection device 52, a power device, an operation console and a material receiving plate 53, the inclined strut 51 is connected between the shield receiving well and the end cover 11 to support the fixed casing 1, so that when an accident occurs, the fixed casing 1 is stable, the displacement and deformation of the fixed casing 1 are avoided, and the accident is further limited, the water injection device 52 includes a water injection pump and a water injection pipe, the water injection pump is arranged on the bottom surface, connected with the power device and the operation console, and connected to the outer shell 12, and when an accident occurs, the water injection pump is controlled to inject water into the cavity through the water injection pipe, and the water and soil pressure at the bottom layer of the hole opening position is balanced by using water pressure; the power device comprises an air compressor, a hydraulic pump station and an air storage tank, the sealing structure 4 is connected with the air storage tank through the air compressor, and when sealing is needed, the sealing structure 4 is inflated through the air compressor; the operation platform is located outside the fixed shell 1, the telescopic structure 3 and the sealing structure 4 are both connected with the power device and the operation platform, and the material receiving plate 53 is arranged in the telescopic shell 2.
As shown in fig. 9, 10, and 11, the material receiving plate 53 further includes an arc plate 531 and a moving wheel 532, the moving wheel 532 is disposed on the bottom surface of the arc plate 531, the arc plate 531 is connected to the inner wall of the telescopic housing 2 through the moving wheel 532, and the moving wheel 532 is disposed to limit the position of the arc plate 531, so that the arc plate 531 does not move left and right, and simultaneously the relative movement between the telescopic housing 2 and the arc plate 531 is not affected, so that the arc plate 531 can move back and forth along the axial direction of the telescopic housing 2. Connect flitch 53 as the basis of setting up the work frame when normal construction, arc 531 connects through removing wheel 532 and does not influence the free flexible of flexible casing 2 at flexible casing 2 inner wall simultaneously to when guaranteeing the accident, flexible casing 2 can stretch out fast.
Further, the external diameter of arc 531 is the same with the internal diameter of shield opening steel ring, and after arc 531 stretches out, provides the horizontally basis in order to make things convenient for the setting up of work frame, the connection can be dismantled on shield opening steel ring to the rear end of arc 531.
Preferably, the arc degree of the arc plate 531 is 90 °, and three moving wheels 532 are provided.
Further, the sealing structure 4 is an annular inflatable air bag, and the sealing structure is inflated to expand to extrude and seal gaps, wherein the pressure resistance is 0.5 Mpa.
Further, the inner diameter of the fixed shell 1 is 400mm larger than that of the steel ring at the shield opening, and the inner diameter of the telescopic shell 2 is 200mm smaller than that of the fixed shell 1.
Further, the lower portion of the inner flange 121 and the upper portion of the outer flange 21 at the front end of the telescopic housing 2 are overlapped with each other by a length of 70 mm.
A construction method for chiseling an emergency device at a tunnel opening of a telescopic buckle cover type shield end comprises the following steps:
s1, equipment assembly: assembling equipment at the shield tunnel portal, and debugging and commissioning after the assembling is finished; during assembly, the sealing structure 4 and the material receiving plate 53 are installed in place, then the telescopic shell 2 is installed in the fixed shell 1, the fixed shell 1 is installed at the opening, the inclined strut 51 is used for supporting and fixing the fixed shell 1, and then the water injection device 52, the power device and the operation table are installed and connected;
s2, erecting a working frame: retracting the telescopic shell 2 into the shell 12, extending the material receiving plate 53 out of the telescopic shell 2, hinging the rear end of the material receiving plate 53 on a steel ring at the shield tunnel portal to form a horizontal foundation, and then building a working frame on the material receiving plate 53 to carry out tunnel portal chiseling construction;
s3, emergency operation: when water burst, sand burst and collapse trend or accidents occur at the cave entrance in the construction process, construction personnel withdraw from the working frame, the telescopic structure 3 is controlled to extend out through the operating platform, the telescopic shell 2 is pushed out from the shell 12 until the rear end of the telescopic shell 2 is contacted with the end wall of the shield cave entrance structure, and the fixed shell 1, the telescopic shell 2 and the end wall of the shield cave entrance structure form a closed space;
s4, inflating and sealing: the sealing structure 4 is controlled by an operation console to inflate, and a gap between the fixed shell 1 and the telescopic shell 2 and a gap between the telescopic shell 2 and the end wall of the shield tunnel portal structure are sealed and plugged, so that a sealed cavity space is formed among the fixed shell 1, the telescopic shell 2 and the end wall of the shield tunnel portal structure;
s5, pressurization and balance: the water injection device 52 is controlled by the operation console to inject water into the cavity space until the water pressure in the cavity space is balanced with the water and soil pressure of the stratum at the hole position, and after the water pressure reaches a balanced state, further development and expansion of accidents can be limited;
s6, dangerous case disposal: the dangerous case at the position of the hole is treated by adopting grouting reinforcement and water stop measures in the ground, the shield tunnel or the shield body, after the dangerous case is eliminated, water in the cavity space is discharged, the sealing structure 4 is deflated, and then the telescopic shell 2 is retracted into the shell 12;
s7, construction recovery: after the cavity space is cleaned, the constructor continues to perform hole chiseling operation on the working frame;
s8, shield starting receiving: and after the tunnel opening is chiseled, the emergency device is removed, and subsequent shield machine starting or receiving operation is carried out.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. A flexible buckle closure type shield end opening chiseling emergency device is characterized by comprising a fixed shell (1), a flexible shell (2), a flexible structure (3), a sealing structure (4) and an auxiliary structure (5), wherein the fixed shell (1) is arranged at a shield opening, a space is reserved between the fixed shell (1) and a shield opening structure end wall, the flexible shell (2) is arranged in the fixed shell (1), the flexible structure (3) is arranged in the fixed shell (1) and connected with the flexible shell (2), the sealing structure (4) is arranged at the rear end of the fixed shell (1) and the rear end of the flexible shell (2), and the auxiliary structure (5) is connected with the fixed shell (1), the flexible structure (3) and the sealing structure (4);
establish seal structure (4) in fixed casing (1) rear end and be located the clearance between fixed casing (1) and flexible casing (2), when flexible casing (2) stretches out, establish seal structure (4) and the shield tunnel portal structure headwall contact at flexible casing (2) rear end.
2. The retractable buckle cover type shield end opening chiseling emergency device according to claim 1, which is characterized in that: the fixed shell (1) and the telescopic shell (2) are both circular shells, the fixed shell (1) comprises an end cover (11) and a shell (12), the end cover (11) is arranged at the front end of the shell (12), and the telescopic shell (2) is arranged in the shell (12);
the rear end of shell (12) is equipped with inner flange (121), tip all is equipped with outer flange (21) around flexible casing (2), and outer flange (21) of establishing at flexible casing (2) front end are located shell (12) to be located the front side of inner flange (121), establish outer flange (21) of establishing at flexible casing (2) rear end and lie in outside shell (12), seal structure (4) are established on inner flange (121), are located between inner flange (121) and the outer flange (21) of flexible casing (2) front end.
3. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 2, which is characterized in that: the telescopic structure (3) is arranged in the shell (12) along the circumferential direction, and the telescopic end of the telescopic structure (3) is connected to an outer flange (21) at the front end of the telescopic shell (2); an annular groove (22) is formed in an outer flange (21) at the rear end of the telescopic shell (2), the annular groove (22) is formed in the rear side of the outer flange (21), and the sealing structure (4) is arranged in the annular groove (22).
4. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 2, which is characterized in that: auxiliary structure (5) include bracing (51), water injection device (52), power device, operation panel and connect flitch (53), bracing (51) are connected between shield receiving well and end cover (11), water injection device (52) are connected on shell (12) to be connected with power device and operation panel, the operation panel is located outside fixed casing (1), extending structure (3) and seal structure (4) all are connected with power device and operation panel, connect flitch (53) to establish in extending casing (2).
5. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 4, which is characterized in that: the material receiving plate (53) comprises an arc-shaped plate (531) and a moving wheel (532), the moving wheel (532) is arranged on the bottom surface of the arc-shaped plate (531), and the arc-shaped plate (531) is connected to the inner wall of the telescopic shell (2) through the moving wheel (532) and moves front and back along the axial direction of the telescopic shell (2).
6. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 5, which is characterized in that: the outer diameter of the arc-shaped plate (531) is the same as the inner diameter of the steel ring at the shield opening, and the rear end of the arc-shaped plate (531) is detachably connected to the steel ring at the shield opening.
7. The retractable buckle cover type shield end opening chiseling emergency device according to claim 1, which is characterized in that: the sealing structure (4) is an annular inflatable air bag, and the pressure resistance is 0.5 Mpa.
8. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 2, which is characterized in that: the inner diameter of the fixed shell (1) is 400-300 mm larger than that of the steel ring at the shield hole opening, and the inner diameter of the telescopic shell (2) is 100-300mm smaller than that of the fixed shell (1).
9. The retractable buckle cover type shield end opening chiseling emergency device as claimed in claim 8, wherein: the lower part of the inner flange (121) is mutually overlapped with the upper part of the outer flange (21) at the front end of the telescopic shell (2), and the overlapping length is 70-90 mm.
10. The construction method for the emergency device for chiseling the tunnel opening of the telescopic buckle cover type shield end according to any one of claims 1 to 9, is characterized by comprising the following steps of:
s1, equipment assembly: assembling equipment at the shield tunnel portal, and debugging and commissioning after the assembling is finished;
s2, erecting a working frame: retracting the telescopic shell (2) into the shell (12), extending the material receiving plate (53) out of the telescopic shell (2), hinging the rear end of the material receiving plate (53) on a steel ring of the shield tunnel portal, and then erecting a working frame on the material receiving plate (53) to carry out tunnel portal chiseling construction;
s3, emergency operation: when water burst, sand burst and collapse trends or accidents occur at the cave entrance in the construction process, constructors withdraw from the working frame, the telescopic structure (3) is controlled to extend through the operating platform, the telescopic shell (2) is pushed out of the shell (12) until the rear end of the telescopic shell (2) is in contact with the end wall of the shield cave entrance structure, and the fixed shell (1), the telescopic shell (2) and the end wall of the shield cave entrance structure form a closed space;
s4, inflating and sealing: the sealing structure (4) is controlled to be inflated through the operating console, and a gap between the fixed shell (1) and the telescopic shell (2) and a gap between the telescopic shell (2) and the end wall of the shield tunnel portal structure are sealed and blocked, so that a sealed cavity space is formed among the fixed shell (1), the telescopic shell (2) and the end wall of the shield tunnel portal structure;
s5, pressurization balance: controlling a water injection device (52) to inject water into the cavity space through the operation table until the water pressure in the cavity space is balanced with the water and soil pressure of the stratum at the hole position;
s6, dangerous case disposal: the dangerous case at the position of the hole is treated by adopting grouting reinforcement and water stop measures in the ground, the shield tunnel or the shield body, after the dangerous case is eliminated, water in the cavity space is discharged, the sealing structure (4) is deflated, and then the telescopic shell (2) is retracted into the shell (12);
s7, construction recovery: after the cavity space is cleaned, the constructor continues to perform hole chiseling operation on the working frame;
s8, shield starting receiving: and after the tunnel opening is chiseled, the emergency device is removed, and subsequent shield machine starting or receiving operation is carried out.
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| CN202210913201.5A CN114961749B (en) | 2022-08-01 | 2022-08-01 | Telescopic buckle cover type shield end opening chiseling emergency device and construction method |
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| JP2005042305A (en) * | 2003-07-22 | 2005-02-17 | Morimotogumi:Kk | Starting structure and method and arrival structure and method of excavator |
| CN203594455U (en) * | 2013-11-01 | 2014-05-14 | 中铁上海工程局有限公司 | Removable adjustment type work platform for tunnel portal chiseling removing |
| CN108756908A (en) * | 2018-04-03 | 2018-11-06 | 中铁十二局集团有限公司 | A kind of Suporting structure for voluntarily abolishing portal and method of appearing |
| CN114810111A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling shield opening enclosure integrally and construction method |
| CN114810110A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Shield receiving construction system and construction method suitable for complex stratum |
| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005042305A (en) * | 2003-07-22 | 2005-02-17 | Morimotogumi:Kk | Starting structure and method and arrival structure and method of excavator |
| CN203594455U (en) * | 2013-11-01 | 2014-05-14 | 中铁上海工程局有限公司 | Removable adjustment type work platform for tunnel portal chiseling removing |
| CN108756908A (en) * | 2018-04-03 | 2018-11-06 | 中铁十二局集团有限公司 | A kind of Suporting structure for voluntarily abolishing portal and method of appearing |
| CN114810111A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling shield opening enclosure integrally and construction method |
| CN114810110A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Shield receiving construction system and construction method suitable for complex stratum |
| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
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| CN114961749B (en) | 2022-12-20 |
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Inventor after: Ma Yunxin Inventor after: Zhao Hongyan Inventor after: Qi Feng Inventor after: Chen Hao Inventor after: Ma Qianli Inventor after: Li Sen Inventor after: Kan Baocun Inventor after: Guo Zhiming Inventor after: Jiang Kai Inventor before: Ma Yunxin Inventor before: Zhao Hongyan Inventor before: Li Sen Inventor before: Kan Baocun Inventor before: Guo Zhiming |