CN115596456B - A shield machine with corrective function suitable for karst geology - Google Patents
A shield machine with corrective function suitable for karst geology Download PDFInfo
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- CN115596456B CN115596456B CN202211102826.XA CN202211102826A CN115596456B CN 115596456 B CN115596456 B CN 115596456B CN 202211102826 A CN202211102826 A CN 202211102826A CN 115596456 B CN115596456 B CN 115596456B
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- shield
- cushion layer
- driving belt
- bin
- lining
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明涉及盾构机技术领域，公开了一种适用于岩溶地质的可纠偏盾构机，包括：前盾与后盾，前盾与后盾之间采用球铰连接，前盾的外侧设有用于辅助纠偏的盾壳；前盾在轴向上由外至内依次包括刀盘、土仓与设备仓，后盾包括驱动机构、推进顶与设置在衬砌前方的预设件；驱动机构包括内垫层与外垫层，内垫层上设有纵向驱动带与横向驱动带，外垫层上设有用于推移内垫层的挤压件；设备仓一端为圆柱形，另一端为球台形，圆柱形一侧与土仓连接，球台一侧分别与纵向驱动带、横向驱动带相接触。本发明适用于岩溶地层，当前盾发生栽头或偏转后，可以在不破坏已安装衬砌块的情况下对前盾进行姿态调整，同时可以在栽头事故中最大程度上减少事故对设备的损伤。
The invention relates to the technical field of shield machines, and discloses a shield machine suitable for karst geology that can be corrected, comprising: a front shield and a rear shield, the front shield and the rear shield are connected by a ball joint, and a shield shell for assisting in correcting the deviation is arranged on the outer side of the front shield; the front shield includes a cutter head, a soil bin and an equipment bin in the axial direction from the outside to the inside, and the rear shield includes a driving mechanism, a propulsion top and a preset part arranged in front of the lining; the driving mechanism includes an inner cushion layer and an outer cushion layer, a longitudinal driving belt and a transverse driving belt are arranged on the inner cushion layer, and an extrusion member for pushing the inner cushion layer is arranged on the outer cushion layer; one end of the equipment bin is cylindrical, and the other end is spherical, one side of the cylinder is connected to the soil bin, and one side of the spherical table is in contact with the longitudinal driving belt and the transverse driving belt respectively. The invention is suitable for karst formations, and when the front shield is head-dumped or deflected, the posture of the front shield can be adjusted without destroying the installed lining blocks, and the damage to the equipment caused by the head-dumping accident can be minimized to the greatest extent.
Description
Technical Field
The invention relates to the technical field of shield machines, in particular to a correctable shield machine suitable for karst geology.
Background
The shield machine is a construction machine and a powerful temporary supporting structure, and uses lining segments with installed tail parts as supporting points to push forwards, and uses a cutter disc to cut soil bodies, and simultaneously, the soil bodies are discharged and the following precast concrete lining blocks are assembled.
The shield construction method is a fully mechanized construction method in the construction of the undermining method, and is characterized in that shield machinery is pushed in soil or rock, and collapse in a tunnel is prevented by a shield shell and surrounding rocks around a duct piece support. Meanwhile, soil is excavated in front of the excavation face by using a cutting device, the soil is transported out of the tunnel through a soil-out machine, the soil is pressurized and jacked in the rear part by using a jack, and precast concrete segments are assembled to form the mechanized construction method of the tunnel structure. When the shield machine tunnels in karst strata, the shield machine has the risk of head planting due to the existence of weak strata such as a submerged karst cave, if the head planting happens in the tunneling process, the posture of the shield machine is difficult to adjust, and the shield tail has the risk of crushing lining segments due to overlarge displacement generated by the head planting.
Disclosure of Invention
The invention provides a deviation-rectifying shield machine suitable for karst geology, which solves the problem that the posture of the shield machine is not easy to adjust after head planting occurs in karst areas.
A shield machine capable of correcting deviation suitable for karst geology comprises a front shield and a rear shield, wherein the front shield and the rear shield are connected by adopting a spherical hinge, a shield shell for assisting in correcting deviation is arranged on the outer side of the front shield, the front shield sequentially comprises a cutter disc, a soil bin and an equipment bin from outside to inside in the axial direction, and the rear shield comprises a driving mechanism, a pushing top and a preset piece arranged in front of a lining;
The driving mechanism comprises an inner cushion layer and an outer cushion layer, a longitudinal driving belt and a transverse driving belt are arranged on the inner cushion layer, and an extrusion part for pushing the inner cushion layer is arranged on the outer cushion layer;
One end of the equipment bin is cylindrical, the other end of the equipment bin is in a spherical table shape, one cylindrical side of the equipment bin is connected with the soil bin, and one side of the spherical table is respectively contacted with the longitudinal driving belt and the transverse driving belt.
The technical scheme has the advantages that the front shield and the rear shield are connected in the spherical hinge mode on the basis of a traditional shield machine, when the front shield has a head planting accident in a karst area, the posture of the rear shield is not influenced, the longitudinal and transverse driving belts are adopted on the spherical hinge contact surface to drive and adjust the posture of the front shield, the rear shield is connected with the lining through the preset piece in the adjusting process, the reaction force generated by adjusting the front shield cannot directly act on the lining, the safety of rear shield equipment and the installed duct piece lining is guaranteed, the rear shield tail is prevented from crushing the lining, the driving mechanism is adopted in the adjusting process of the front shield, and the influence of external geological conditions is small.
Further, the shield shell is of an arc-shaped structure and is provided with a penetrating inflation inlet, the outer side of the inflation inlet is connected with an air bag, and the inner side of the inflation inlet is provided with a sealing cover.
The technical scheme has the beneficial effects that the air bags are arranged on the outer side of the shield shell to assist the front shield in posture adjustment, so that the adjustment speed and the working efficiency are increased.
Further, the longitudinal driving belt and the transverse driving belt are sleeved on an output shaft of the driving piece and driven by the driving piece to rotate.
Further, a sensor for detecting the rotation torque of the front shield is arranged on the inner cushion layer, and the sensor is in communication connection with an external signal receiver.
The technical scheme has the beneficial effects that the torque change condition of the front shield can be detected through the sensor, so that internal staff can conveniently master the gesture adjustment precision of the front shield in real time.
Further, two ends of the preset piece are respectively connected with the rear shield and the lining, and a gap is reserved between the preset piece and the lining.
Further, the front end of the pushing roof is connected with the driving mechanism, and the rear end of the pushing roof is contacted with the lining.
Further, a spiral soil outlet device, a man bin and a cutter head driver are fixedly arranged in the equipment bin.
Further, the pressing member is a hydraulic jack.
The correcting shield machine is suitable for karst strata, after the front shield is planted or deflected, the front shield can be adjusted in posture under the condition that the installed lining building blocks are not damaged, the shield machine is divided into the front shield which is responsible for excavation and the rear shield which is responsible for pushing and installing lining segments through a ball hinged connection mode, the posture of the front shield is adjusted while the rear shield is fixed, meanwhile, the damage of accidents to equipment can be reduced to the greatest extent in the event of planting the front shield, and the construction efficiency of the shield machine in the karst strata can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of an inner mat according to the present invention;
FIG. 3 is a schematic view of the outer mat according to the present invention;
fig. 4 is a schematic structural view of a shield shell according to the present invention.
In the figure, 1-front shield, 11-cutterhead, 12-soil bin, 13-equipment bin, 14-shield shell, 141-air bag, 142-inflation port, 143-sealing cover, 2-rear shield, 21-driving mechanism, 211-inner cushion, 212-outer cushion, 213-longitudinal driving belt, 214-transverse driving belt, 215-extrusion piece, 216-driving piece, 22-lining, 23-pushing top and 24-preset piece.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Referring to fig. 1 to 4, the invention provides a shield machine applicable to karst geology and capable of correcting deviation, which comprises a front shield 1 and a rear shield 2, wherein the front shield 1 and the rear shield 2 are connected by adopting a spherical hinge, and a shield shell 14 for assisting in correcting deviation is arranged on the side surface of the front shield 1;
The front shield 1 sequentially comprises a cutter head 11, a soil bin 12 and an equipment bin 13 from outside to inside in the axial direction, and the rear shield 2 comprises a driving mechanism 21, a pushing top 23 and a preset piece 24 arranged in front of a lining 22;
the equipment bin 13 has a cylindrical shape at one end and a spherical table shape at the other end, one side of the cylindrical shape is connected with the soil bin 12, and one side of the spherical table is respectively contacted with a longitudinal driving belt 213 and a transverse driving belt 214 in the driving mechanism 21.
The equipment bin 13 is internally fixedly provided with necessary facilities such as a spiral soil outlet device, a man bin and a cutter head driver, so that normal propulsion of the shield machine is ensured, the facilities are not movable, and the facilities fixed in the equipment bin 13 are ensured not to fall when the front shield 1 rotates for propulsion or head planting occurs.
The driving mechanism 21 comprises an inner cushion layer 211 and an outer cushion layer 212, wherein the inner cushion layer 211 and the outer cushion layer 212 are of arc structures, stainless steel is used for shaping the outline edges, a longitudinal driving belt 213 and a transverse driving belt 214 are arranged in the inner cushion layer 211, an extrusion piece 215 for pushing the inner cushion layer 211 is arranged on the outer cushion layer 212, the extrusion piece 215 acts on the inner cushion layer 211 to enable the longitudinal driving belt 213 and the transverse driving belt 214 on the inner cushion layer 211 to be tightly pressed on a hinged spherical surface of the equipment bin 13, the longitudinal driving belt 213 and the transverse driving belt 214 are made of rubber with high adhesiveness, in order to ensure that the driving belt and the hinged spherical surface have enough friction force so as not to slide mutually, the extrusion piece 215 is a hydraulic jack, the longitudinal driving belt 213 and the transverse driving belt 214 are sleeved on an output shaft of a driving piece 216, the driving piece 216 is driven to rotate by the driving piece 216 can select a motor, and the driving piece 216 can drive the whole front shield 1 to rotate when the longitudinal driving belt 213 and the transverse driving belt 214 rotate.
The driving mechanism 21 has two working states for the equipment bin 13, one is active, the other is passive, the driving belt is in an active working state when driven by the driving piece 216, and the equipment bin 13 rotates to a passive working state under the action of external force and friction between the driving piece 216 when the driving piece 216 does not work.
The sensor for detecting the rotation torque of the front shield 1 is arranged on the inner cushion layer 211, the sensor is in communication connection with an external signal receiver, when the front shield 1 deflects or is planted, the rotation angle can be judged by detecting the torque of the front shield 1 through the sensor, and when the posture of the front shield 1 is adjusted, the adjusting condition can be mastered in real time through the sensor.
The shield shell 14 is of an arc-shaped structure and is provided with a penetrating inflation port 142, the outer side of the inflation port 142 is connected with an air bag 141, the inner side of the inflation port 142 is provided with a sealing cover 143, when the front shield 1 is planted, the air bag 141 is inflated through the inflation port 142, the air bag 141 is inflated between the front shield 1 and the inner wall of a tunnel, posture adjustment of the front shield 1 is assisted, the air bag 141 is made of wear-resistant and high-pressure-resistant materials, the reaction force of the front shield 1 adjustment process is conveniently borne, and the air bag 141 can be inflated by liquid filling modes such as grouting besides inflation.
The preset piece 24 is an annular lining block, compared with a normally installed lining block, the preset piece 24 has the function of reserving enough safety space for the shield machine and the lining 22 and preventing the lining 22 from being damaged when the rear shield 2 is displaced, two ends of the preset piece 24 are respectively connected with the rear shield 2 and the lining 22, and a gap is reserved between the preset piece 24 and the lining 22.
The front end of the pushing roof 23 is connected with the driving mechanism 21, the rear end is in contact with the lining 22, when the whole shield machine needs to advance, the bottom end of the pushing roof 23 acts on the side surface of the lining 22 and pushes the shield machine forward, and then the lining 22 is installed at the position of the original pushing roof 23, so that the circular operation completes the installation of the lining 22.
The working process of the invention comprises the following steps:
When the shield is excavated normally, the driving mechanism fixes the equipment bin to be in a passive rotation state, and simultaneously, the posture and the rotation torque of the front shield are detected through the sensor. When the rotation torque is increased severely, the driving mechanism is allowed to reduce the clamping force on the equipment bin (namely, the pushing of the extrusion piece to the inner cushion layer is closed, so that the positive pressure of the inner cushion layer and the hinged spherical surface is reduced), the posture of the front shield is prevented from being damaged, the posture of the rear shield is prevented from being changed, and the rear shield is prevented from crushing the installed lining. When the front shield is changed in large postures such as head planting, the preset piece and the trolley of the rear shield are connected and fixed through the connecting piece, so that a certain gap is kept between the rear shield and the lining, and the posture of the front shield is adjusted through the driving mechanism. The auxiliary air bags are released outwards through the shield shell inflation openings on the outer side of the front shield, and the posture between the front shield and the stratum is regulated in an auxiliary mode until the posture of the shield machine is regulated. And finally, advanced grouting is carried out on the stratum in the shield machine, and the stratum in front of and below the shield machine is reinforced until the stratum can normally pass.
The foregoing is merely a preferred embodiment of the invention, which is not representative of all possible forms of the invention, and the scope of the invention is not limited to such specific statements and embodiments. Various other modifications and improvements can be made in light of the teachings of the present disclosure without departing from the spirit and scope of the invention.
Claims (8)
1. The shield machine capable of correcting deviation is characterized by comprising a front shield (1) and a rear shield (2), wherein the front shield (1) and the rear shield (2) are connected by adopting a spherical hinge, and a shield shell (14) for assisting in correcting deviation is arranged on the outer side of the front shield (1);
The front shield (1) sequentially comprises a cutter head (11), a soil bin (12) and an equipment bin (13) from outside to inside in the axial direction, and the rear shield (2) comprises a driving mechanism (21), a pushing top (23) and a preset piece (24) arranged in front of the lining (22);
The driving mechanism (21) comprises an inner cushion layer (211) and an outer cushion layer (212), wherein a longitudinal driving belt (213) and a transverse driving belt (214) are arranged on the inner cushion layer (211), and an extrusion piece (215) for pushing the inner cushion layer (211) is arranged on the outer cushion layer (212);
One end of the equipment bin (13) is cylindrical, the other end of the equipment bin is in a spherical table shape, one cylindrical side of the equipment bin is connected with the soil bin (12), and one spherical table side is respectively contacted with the longitudinal driving belt (213) and the transverse driving belt (214).
2. The deviation-rectifying shield machine suitable for karst geology of claim 1, wherein the shield shell (14) is of an arc-shaped structure and is provided with a penetrating inflation inlet (142), an air bag (141) is connected to the outer side of the inflation inlet (142), and a sealing cover (143) is arranged on the inner side of the inflation inlet (142).
3. The correctable shield tunneling machine suitable for karst geology of claim 1, wherein the longitudinal driving belt (213) and the transverse driving belt (214) are both sleeved on an output shaft of a driving member (216), and are driven to rotate by the driving member (216).
4. The correctable shield tunneling machine suitable for karst geology of claim 1, wherein the inner cushion layer (211) is provided with a sensor for detecting the rotation torque of the front shield (1), and the sensor is in communication connection with an external signal receiver.
5. The correctable shield tunneling machine suitable for karst geology according to claim 1, wherein the two ends of the pre-set piece (24) are respectively connected with the rear shield (2) and the lining (22), and the pre-set piece (24) and the lining (22) are kept with a gap.
6. The shield tunneling machine applicable to karst geology of claim 1, wherein said pushing ram (23) has a front end connected to said driving mechanism (21) and a rear end in contact with said lining (22).
7. The correcting shield machine suitable for karst geology of claim 1, wherein the equipment bin (13) is fixedly provided with a spiral soil outlet, a human bin and a cutter head driver.
8. The machine for the correctable shield of karst geology of any one of claim 1 to 7, wherein the extrusion (215) is a hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211102826.XA CN115596456B (en) | 2022-09-09 | 2022-09-09 | A shield machine with corrective function suitable for karst geology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211102826.XA CN115596456B (en) | 2022-09-09 | 2022-09-09 | A shield machine with corrective function suitable for karst geology |
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| Publication Number | Publication Date |
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| CN115596456A CN115596456A (en) | 2023-01-13 |
| CN115596456B true CN115596456B (en) | 2025-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211102826.XA Active CN115596456B (en) | 2022-09-09 | 2022-09-09 | A shield machine with corrective function suitable for karst geology |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518446A (en) * | 2012-01-12 | 2012-06-27 | 北京众策创晟掘进装备有限公司 | Automatic deviation rectifying method of shield tunneling machine |
| CN113944475A (en) * | 2021-10-23 | 2022-01-18 | 中电建十一局工程有限公司 | Large-size rectangular pipe jacking construction method for stratum with upper soft layer and lower hard layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5605103B2 (en) * | 2010-09-08 | 2014-10-15 | 株式会社大林組 | Shield machine and attitude control method of shield machine |
| CN102383805B (en) * | 2011-10-19 | 2013-12-04 | 中铁隧道装备制造有限公司 | Mixed TBM (Tunnel Boring Machine) with multiple-boring mode and tunnel supporting mode |
| CN103343691A (en) * | 2013-07-25 | 2013-10-09 | 湖南大学 | Posture adjusting device of minitype shield tunneling machine |
| JP6470077B2 (en) * | 2015-03-13 | 2019-02-13 | 日本シビックコンサルタント株式会社 | Cutting bit mounting structure of tunnel machine |
| CN108661653A (en) * | 2018-05-22 | 2018-10-16 | 中交二公局第三工程有限公司 | The method realized and quickly rectified a deviation is promoted by the way that manual operation shield machine is actively hinged |
| CN211081858U (en) * | 2019-10-17 | 2020-07-24 | 中铁十六局集团北京轨道交通工程建设有限公司 | Subway tunnel shield machine with attitude adjustment device |
-
2022
- 2022-09-09 CN CN202211102826.XA patent/CN115596456B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518446A (en) * | 2012-01-12 | 2012-06-27 | 北京众策创晟掘进装备有限公司 | Automatic deviation rectifying method of shield tunneling machine |
| CN113944475A (en) * | 2021-10-23 | 2022-01-18 | 中电建十一局工程有限公司 | Large-size rectangular pipe jacking construction method for stratum with upper soft layer and lower hard layer |
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| CN115596456A (en) | 2023-01-13 |
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