CN210530827U - Large shield assembly type four-character-shaped cutter head manhole structure for sandy gravel layer - Google Patents
Large shield assembly type four-character-shaped cutter head manhole structure for sandy gravel layer Download PDFInfo
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- CN210530827U CN210530827U CN201921371744.9U CN201921371744U CN210530827U CN 210530827 U CN210530827 U CN 210530827U CN 201921371744 U CN201921371744 U CN 201921371744U CN 210530827 U CN210530827 U CN 210530827U
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Abstract
The utility model provides a sand-gravel layer large shield assembly type four-shaped cutterhead manhole structure, belonging to the technical field of foundation pit support, comprising a manhole and a support component arranged in the manhole; the maintenance well is a quasi-rectangular well body cut off along a long shaft, a well mouth is provided with a locking mouth ring poured by concrete and a steel bar framework, the well body between the well mouth and the top of the shield machine cutter head is a reinforcing section, and the well body between the top of the shield machine cutter head and the center of the shield machine cutter head is a shield section; the supporting assembly comprises an annular supporting assembly and a reinforcing assembly; the reinforcing section is provided with a circumferential supporting component and a reinforcing component, and the shield section is provided with a circumferential supporting component; the annular support component comprises an annular corrugated plate, annular I-shaped steel and a grouting pipe; the reinforcing component comprises a supporting corrugated plate, supporting I-shaped steel and reinforcing I-shaped steel. The manhole structure can be excavated and assembled after the position of the manhole is positioned on site, and the support can be dismantled and reused after the construction is finished.
Description
Technical Field
The utility model belongs to the technical field of excavation supporting, a four style of calligraphy blade disc manhole structures of sand cobble layer big shield assembly type is specifically disclosed.
Background
With the arrival of the climax of urban subway construction, a shield interval develops to a long distance, a large diameter and an ultra-deep buried mode, a cutter of the shield is abraded in the tunneling process, particularly the cutter of the large-diameter shield is seriously abraded in the tunneling process of a sand gravel layer, the interval tunneling task can be completed only by overhauling the cutter even in a short interval, however, the cutter can not be exchanged by in-tunnel belt pressure in the sand gravel layer, the conventional method is to overhaul the cutter after a vertical shaft is formed by excavating and erecting a grid steel frame net spraying support in advance, and finally excavation can be recovered after breaking reinforced concrete and backfilling. If the distance of the vertical shaft is too long, the cutter is easily worn and cannot be driven into the vertical shaft, and if the distance of the vertical shaft is too short, the cutter maintenance times are increased and the difficulty in ground traffic relief is increased. At present, a method for scientifically determining an access well and quickly constructing the access well does not exist to solve the technical problem of cutter access well construction of a sand and gravel layer.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sand cobble layer big shield constructs assembled four style of calligraphy blade disc manhole structure can excavate fast and assembly part installation and slip casting behind parameter and the on-the-spot location manhole position of tunneling according to the shield structure to can demolish the assembly part and reuse after the cutter overhauls the construction finishes, with reduce cost and to the pollution of environment.
In order to realize the aim, the utility model provides a sand-gravel layer large shield assembly type four-shaped cutter head manhole structure, which comprises a manhole and a supporting assembly arranged in the manhole; the maintenance well is a quasi-rectangular well body cut off along a long shaft, a well mouth is provided with a locking mouth ring poured by concrete and a steel bar framework, the well body between the well mouth and the top of the shield machine cutter head is a reinforcing section, and the well body between the top of the shield machine cutter head and the center of the shield machine cutter head is a shield section; the supporting assembly comprises a plurality of annular supporting assemblies and reinforcing assemblies which are arranged along the depth direction of the manhole; the reinforcing section is provided with a circumferential supporting component and a reinforcing component, and the shield section is provided with a circumferential supporting component; the annular support component comprises an annular corrugated plate, annular I-shaped steel and a grouting pipe; the annular corrugated plate is attached to the well wall of the inspection well, and polyurethane filler is filled between the annular corrugated plate and the well wall; the annular I-shaped steel is arranged on the inner side of the annular corrugated plate through a bolt; the grouting pipe is welded on the annular corrugated plate, penetrates through the annular corrugated plate and penetrates through the annular I-shaped steel; the circumferential corrugated plates of two adjacent groups of circumferential supporting assemblies are attached and connected through bolts; the reinforcing component comprises a supporting corrugated plate, supporting I-shaped steel and reinforcing I-shaped steel; the supporting corrugated plates and the supporting I-shaped steel are both arranged on a long shaft of the maintenance well; the supporting corrugated plate is attached to the well wall of the maintenance well; the supporting I-shaped steel is arranged on the inner side of the supporting corrugated plate through bolts, and two ends of the supporting I-shaped steel are welded with the annular I-shaped steel; the reinforcing I-beam is symmetrically arranged by taking a short shaft of the manhole as a symmetry axis, a first end is arranged on the supporting I-beam through a bolt, and a second end is arranged at a position, close to the center line, of the annular I-beam through a bolt; the support corrugated plates of two adjacent groups of reinforcing assemblies are attached and connected through bolts.
Furthermore, the annular I-shaped steel comprises two arc sections which are symmetrically arranged by taking the short shaft of the manhole as a symmetry axis; two sections the tip welding that the segmental arc is connected has first connecting steel plate, through passing the first connecting bolt of first connecting steel plate is connected fixedly, and the segmental arc is close to the inboard of first connecting steel plate and is fixed with second connecting steel plate through second connecting bolt connection, and the outside is connected fixedly with the hoop buckled plate through third connecting bolt.
Further, the supporting I-shaped steel comprises two straight line sections which are symmetrically arranged by taking the short shaft of the manhole as a symmetry axis; and the end part connected with the two sections of straight-line sections is welded with a third connecting steel plate, the straight-line sections are fixedly connected with a fourth connecting bolt penetrating through the third connecting steel plate, and the outer side of the straight-line section, which is close to the third connecting steel plate, is fixedly connected with the support corrugated plate through a fifth connecting bolt.
Furthermore, fourth connecting steel plates are welded at the two ends of the reinforcing I-shaped steel, fifth connecting steel plates are welded on the supporting I-shaped steel and the circumferential I-shaped steel, and the fourth connecting steel plates and the fifth connecting steel plates are fixedly connected through sixth connecting bolts.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. by processing the corrugated plate and I-steel combined supporting assembly in advance, the prefabricated assembled shaft is immediately constructed after the shield tunneling is abnormal, the optimal positioning of the shaft is realized, the abnormal construction risk is avoided, and the tool changing times are greatly reduced;
2. the adoption of a four-character-shaped vertical shaft structure realizes the flattening of a large shield cutter maintenance vertical shaft, not only greatly reduces the excavation amount of the vertical shaft, but also ensures the safety and reliability of the well wall at the maintenance position of a shield cutter head;
3. the prefabricated vertical shaft supporting component is assembled, polyurethane is injected after the wall is timely formed, and then the next circular excavation is immediately carried out, so that not only is the backfill between the supporting component and the soil body guaranteed to be compact, but also the water in the stratum is isolated outside the supporting structure, the rapid excavation to the bottom can be realized without ground precipitation, the construction efficiency is high, and the vertical shaft can be completed during the maintenance preparation period of the shield cutter;
4. the method for removing the support component in the manhole and backfilling clay is applied, so that the support component is recycled, and the problems that the conventional mesh-blasting shaft is large in shield excavation recovery risk and the support component cannot be reused are solved;
in a word, adopt the utility model provides a big shield of sandy gravel layer constructs assembled four style of calligraphy blade disc manhole structure, it is slow to have solved the big shield of sandy gravel stratum cutter manhole construction, it is big to pollute, a difficult problem with high costs, the technology of tool changing shaft reuse support system has been opened, shield cutter wearing and tearing shutdown preparation and shaft synchronous construction have been realized, it just accomplishes the cutter manhole to create the shield and shut down ten minutes after the machine is shut down, not only make the cutter tunnelling arrive the limit, and realized that the shaft supports system detachable reuse, and has simple process, low construction cost, the tool changing is apart from advantages such as nimble and maintenance safety is controllable.
Drawings
Fig. 1 is a front view of a sand-gravel layer large shield assembly type four-shaped cutter head manhole structure provided by an embodiment of the utility model;
FIG. 2 is a view in the direction A of FIG. 1;
fig. 3 is a view in the direction B in fig. 1.
In the figure: 1-a locking ring; 2-circumferential corrugated plate; 3-circumferential I-shaped steel; 4-grouting pipe; 5-a polyurethane filler; 6-supporting the corrugated plate; 7-supporting the I-steel; 8-reinforcing the I-steel; 9-a first connecting steel plate; 10-a first connecting bolt; 11-a second connecting bolt; 12-a second connecting steel plate; 13-a third connecting bolt; 14-a third connecting steel plate; 15-a fourth connecting bolt; 16-a fifth connecting bolt; 17-a fourth connecting steel plate; 18-a fifth connecting steel plate; 19-a sixth connecting bolt; 101-shield tunneling machine cutterhead; 102-pebble formation.
Detailed Description
Example 1
The embodiment provides a large shield assembly type four-shaped cutterhead manhole structure with a sandy gravel layer, which comprises a manhole and a supporting assembly arranged in the manhole; the maintenance well is a quasi-rectangular well body which is cut off along a long shaft, a wellhead is provided with a locking ring 1 which is formed by pouring concrete and a steel bar framework, the well body between the wellhead and the top of a cutter head 101 of the shield tunneling machine is a reinforcing section, and the well body between the top of the cutter head 101 of the shield tunneling machine and the center of the cutter head 101 of the shield tunneling machine is a shield section; the supporting assembly comprises a plurality of annular supporting assemblies and reinforcing assemblies which are arranged along the depth direction of the manhole; the reinforcing section is provided with a circumferential supporting component and a reinforcing component, the shield section is provided with the circumferential supporting component, and the reinforcing component is not arranged, so that the cutter head 101 of the shield machine can enter the manhole; the annular support component comprises an annular corrugated plate 2, an annular I-shaped steel 3 and a grouting pipe 4; the annular corrugated plate 2 is attached to the well wall of the maintenance well, and polyurethane filler 5 is filled between the annular corrugated plate 2 and the well wall; the annular I-shaped steel 3 is arranged on the inner side of the annular corrugated plate 2 through a bolt; the grouting pipe 4 is welded on the annular corrugated plate 2, penetrates through the annular corrugated plate 3 and penetrates through the annular I-shaped steel 3; the circumferential corrugated plates 2 of two adjacent groups of circumferential supporting assemblies are attached and connected through bolts; the reinforcing component comprises a supporting corrugated plate 6, a supporting I-shaped steel 7 and a reinforcing I-shaped steel 8; the supporting corrugated plates 6 and the supporting I-shaped steel 7 are both arranged on a long shaft of the maintenance well; the supporting corrugated plate 6 is attached to the wall of the manhole; the supporting I-shaped steel 7 is arranged on the inner side of the supporting corrugated plate 6 through bolts, and two ends of the supporting I-shaped steel are welded with the annular I-shaped steel 3; the reinforcing I-beam 8 is symmetrically arranged by taking a short shaft of the manhole as a symmetry axis, the first end of the reinforcing I-beam is arranged on the supporting I-beam 7 through a bolt, and the second end of the reinforcing I-beam is arranged at a position, close to the center line, of the annular I-beam 3 through a bolt; the support corrugated plates 6 of the two adjacent groups of reinforcing components are attached and connected through bolts.
Further, the circumferential I-steel 3 comprises two arc sections which are symmetrically arranged by taking the short shaft of the manhole as a symmetry axis; two sections the tip welding that the segmental arc is connected has first connecting steel plate 9, through passing first connecting bolt 10 of first connecting steel plate 9 is connected fixedly, and the segmental arc is close to the inboard of first connecting steel plate 9 and is connected through second connecting bolt 11 and is fixed with second connecting steel plate 12 in order to strengthen the connection between two sections segmental arcs, and the outside is connected fixedly with hoop buckled plate 2 through third connecting bolt 13.
Further, the supporting I-steel 7 comprises two straight line segments which are symmetrically arranged by taking the minor axis of the manhole as a symmetry axis; the end part connected with the two sections of straight line sections is welded with a third connecting steel plate 14, the straight line sections are fixedly connected through a fourth connecting bolt 15 penetrating through the third connecting steel plate 14, and the outer side, close to the third connecting steel plate 14, of each straight line section is fixedly connected with the support corrugated plate 6 through a fifth connecting bolt 16.
Further, fourth connecting steel plates 17 are welded at two ends of the reinforcing I-shaped steel 8, fifth connecting steel plates 18 are welded on the supporting I-shaped steel 7 and the circumferential I-shaped steel 3, and the fourth connecting steel plates 17 and the fifth connecting steel plates 18 are fixedly connected through sixth connecting bolts 19.
Further, the annular corrugated plate 2 and the supporting corrugated plate 6 are both aluminum alloy corrugated plates.
The construction step of the sand-gravel layer large shield assembly type four-character-shaped cutter head manhole structure comprises the following steps.
The method comprises the following steps: processing of prefabricated parts
A. According to the diameter of a cutter head 101 of the shield tunneling machine, the length of the maintenance well is designed to be 1 meter larger than the diameter of the cutter head 101 of the shield tunneling machine, the width of the maintenance well is half of the length of the cutter head, four corners of the maintenance well are set to be semi-circular rectangles, then the maintenance well is cut off along a long axis, and a support assembly is prefabricated according to the size of the maintenance well;
B. the aluminum alloy corrugated plate is processed to be 0.5 m wide, bolt holes are processed to be conveniently connected with the annular I-shaped steel 3 and the supporting I-shaped steel 7, and the annular corrugated plate 2 is provided with four grouting pipes 4;
C. welding a first connecting steel plate 7 and a fifth connecting steel plate 16 on the arc-shaped section of the annular I-shaped steel 3, and processing four bolt holes on the first connecting steel plate 7 and the fifth connecting steel plate 16;
D. a third connecting steel plate 12 and a fifth connecting steel plate 16 are welded on the straight line section of the supporting I-shaped steel 7, and four bolt holes are machined in the third connecting steel plate 12 and the fifth connecting steel plate 16;
E. and fourth connecting steel plates 15 are welded at two ends of the reinforcing I-shaped steel 8, and the fourth connecting steel plates 15 are provided with four bolt holes.
Step two: shaft construction
A. When the shield tunneling parameters are abnormal, immediately surveying the ground to determine the shield stopping position;
B. setting out according to 0.5 meter of the outside of a processed component, excavating to a depth of 0.3 meter to serve as an installation space of the locking ring 1, installing annular I-shaped steel 3, an aluminum alloy corrugated plate, supporting I-shaped steel 7 and reinforcing I-shaped steel 8 in the installation space, connecting the annular I-shaped steel 3, the aluminum alloy corrugated plate, the supporting I-shaped steel 7 and the reinforcing I-shaped steel 8 by bolts, and pouring early-strength concrete to form the locking ring 1 after installing reinforcing steel bars outside a structural component;
C. after pouring and initial setting, the fore shaft ring 1 continues to be excavated downwards, and the circumferential I-shaped steel 3, the aluminum alloy corrugated plate, the supporting I-shaped steel 7 and the reinforcing I-shaped steel 8 are arranged in time and connected well by bolts;
D. and C, injecting polyurethane filler 5 to the back of the annular corrugated plate 2, and repeating the step C until the center of the cutter head 101 of the shield tunneling machine is excavated.
Step three: tool repair and backfill
A. After cleaning the cutter head 101 of the shield machine, finishing cutter maintenance by rotating the cutter head 101 of the shield machine;
B. after maintenance of the cutter head 101 of the shield tunneling machine is finished, firstly removing I-shaped steel supports from bottom to top, then removing the circumferential supporting structure, and backfilling in time when each circumferential structure is removed until the removal is finished;
C. and adopting a small torque recovery shield to carry out tunneling.
Example 2
The longest interval of the Beijing airport line is 3900 meters, the stratum is sandy gravel, the shield with the excavation diameter of 9.1 meters is adopted, the cutter head 101 of the shield machine is in a strip-width type, the cutter is a welding-type toothed cutter, and the sandy gravel stratum is seriously worn by the cutter, so that the embodiment 1 is adopted, the maintenance well structure realizes three times of cutter maintenance, the machine is stopped to build a vertical well after the shield tunneling is abnormal every time, the cutter maintenance is completed in 5 days every time, the construction period is saved by more than 1 month compared with the traditional vertical well, the repeated utilization is realized, and the cutter changing record with the longest length of 1800 meters is created. The inspection well is proved to have advanced structure technology, innovativeness and strong applicability.
The above is only the embodiment of the present invention, not limiting the scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the present invention, or directly or indirectly applied to other related technical fields, and all included in the same way in the protection scope of the present invention.
Claims (4)
1. A sand-gravel layer large shield assembly type four-shaped cutterhead manhole structure is characterized by comprising a manhole and a supporting assembly arranged in the manhole;
the maintenance well is a quasi-rectangular well body cut off along a long shaft, a locking ring poured by concrete and a steel reinforcement framework is arranged at a well mouth, the well body between the well mouth and the top of the shield machine cutter head is a reinforcing section, and the well body between the top of the shield machine cutter head and the center of the shield machine cutter head is a shield section;
the supporting assembly comprises a plurality of annular supporting assemblies and reinforcing assemblies which are arranged along the depth direction of the manhole;
the reinforcing section is provided with a circumferential supporting component and a reinforcing component, and the shield section is provided with a circumferential supporting component;
the annular support component comprises an annular corrugated plate, annular I-shaped steel and a grouting pipe;
the annular corrugated plate is attached to the well wall of the inspection well, and polyurethane filler is filled between the annular corrugated plate and the well wall;
the annular I-shaped steel is arranged on the inner side of the annular corrugated plate through a bolt;
the grouting pipe is welded on the annular corrugated plate, penetrates through the annular corrugated plate and penetrates through the annular I-shaped steel;
the circumferential corrugated plates of two adjacent groups of circumferential supporting assemblies are attached and connected through bolts;
the reinforcing component comprises a supporting corrugated plate, supporting I-shaped steel and reinforcing I-shaped steel;
the supporting corrugated plates and the supporting I-shaped steel are both arranged on a long shaft of the maintenance well;
the supporting corrugated plate is attached to the wall of the manhole;
the supporting I-shaped steel is arranged on the inner side of the supporting corrugated plate through bolts, and two ends of the supporting I-shaped steel are welded with the annular I-shaped steel;
the reinforcing I-beam is symmetrically arranged by taking a short shaft of the manhole as a symmetry axis, a first end is arranged on the supporting I-beam through a bolt, and a second end is arranged at a position, close to the center line, of the annular I-beam through a bolt;
the support corrugated plates of two adjacent groups of reinforcing assemblies are attached and connected through bolts.
2. The sand and gravel layer large shield assembly type quadrangular cutterhead manhole structure according to claim 1, wherein the circumferential I-steel comprises two arc sections symmetrically arranged with a minor axis of the manhole as a symmetry axis;
two sections the tip welding that the segmental arc is connected has first connecting steel plate, through passing the first connecting bolt of first connecting steel plate is connected fixedly, and the segmental arc is close to the inboard of first connecting steel plate and is fixed with second connecting steel plate through second connecting bolt connection, and the outside is connected fixedly with the hoop buckled plate through third connecting bolt.
3. The sand and gravel layer large shield assembly type quadrangular cutterhead manhole structure according to claim 1, wherein the supporting I-steel comprises two sections of straight line sections symmetrically arranged with a minor axis of the manhole as a symmetry axis;
and the end part connected with the two sections of straight-line sections is welded with a third connecting steel plate, the straight-line sections are fixedly connected with a fourth connecting bolt penetrating through the third connecting steel plate, and the outer side of the straight-line section, which is close to the third connecting steel plate, is fixedly connected with the support corrugated plate through a fifth connecting bolt.
4. The sand-gravel layer large shield assembly type four-shaped cutterhead manhole structure according to claim 1, wherein fourth connecting steel plates are welded at two ends of the reinforcing I-shaped steel, fifth connecting steel plates are welded on the supporting I-shaped steel and the circumferential I-shaped steel, and the fourth connecting steel plates and the fifth connecting steel plates are fixedly connected through sixth connecting bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921371744.9U CN210530827U (en) | 2019-08-22 | 2019-08-22 | Large shield assembly type four-character-shaped cutter head manhole structure for sandy gravel layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921371744.9U CN210530827U (en) | 2019-08-22 | 2019-08-22 | Large shield assembly type four-character-shaped cutter head manhole structure for sandy gravel layer |
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| CN210530827U true CN210530827U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921371744.9U Active CN210530827U (en) | 2019-08-22 | 2019-08-22 | Large shield assembly type four-character-shaped cutter head manhole structure for sandy gravel layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946350A (en) * | 2020-08-12 | 2020-11-17 | 中铁二十局集团第三工程有限公司 | Construction method for rapidly repairing edge of shield cutter based on high-abrasion stratum |
| CN112796763A (en) * | 2021-03-19 | 2021-05-14 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Deep underground tunnel ventilation shaft supporting construction |
-
2019
- 2019-08-22 CN CN201921371744.9U patent/CN210530827U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946350A (en) * | 2020-08-12 | 2020-11-17 | 中铁二十局集团第三工程有限公司 | Construction method for rapidly repairing edge of shield cutter based on high-abrasion stratum |
| CN112796763A (en) * | 2021-03-19 | 2021-05-14 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Deep underground tunnel ventilation shaft supporting construction |
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