CN109630175B - Movable prestress supporting system and using method thereof - Google Patents
Movable prestress supporting system and using method thereof Download PDFInfo
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- CN109630175B CN109630175B CN201811222194.4A CN201811222194A CN109630175B CN 109630175 B CN109630175 B CN 109630175B CN 201811222194 A CN201811222194 A CN 201811222194A CN 109630175 B CN109630175 B CN 109630175B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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Abstract
The invention discloses a movable prestress supporting system and a using method thereof, which are characterized by comprising a main body frame type steel support, a reclining counter force seat, an inverted arch counter force seat, a construction side counter force seat, an arch bottom counter force seat, a supporting protection support bottom plate, an under-plate movable wheel rail and a wheel rail vertical telescopic device; main part frame-type steel shotcrete includes 8 main structure posts that enclose into the rectangle, lean on the reaction seat after including horizontal telescopic back reaction seat support and lean on the stress buffer block after, the inverted arch reaction seat includes vertical telescopic inverted arch reaction seat support and inverted arch stress buffer block, construction side reaction seat includes two construction side stress buffer blocks of horizontal telescopic construction side reaction seat support and symmetric distribution, it includes vertical telescopic arch bottom reaction seat support and arch bottom stress buffer block to encircle the bottom reaction seat, it sets up the lower extreme at the main structure post to support the fixed setting of protective housing bottom plate, the advantage is portable, fast supporting, can provide the recoil for the contact channel entry driving machine, vertical evenly distributed is realized to the load.
Description
Technical Field
The invention belongs to the field of underground engineering, and particularly relates to a movable prestress supporting system and a using method thereof.
Background
In recent years, the shield method is widely applied to engineering construction due to the characteristics of good construction quality, safety, small influence on the surrounding environment and the like. In the shield construction, the construction situation of a tunnel lateral opening exists, including the conditions of the construction of a communication channel between two single-line section tunnels, the construction of an air shaft and the like, and the construction method can adopt an open excavation method, a soil body reinforcement subsurface excavation method, a pipe shed method, a small shield method and the like. Wherein the small-sized shield method adopts mechanical excavation, which not only solves the problem of starting in narrow space, but also can easily control the construction axis of the connecting channel. However, in the excavation process, the shield machine may apply pressure to the tunnel, especially, the lateral opening-shaped unstable structure is easy to generate additional deformation to the tunnel segment, so that in order to ensure the segment safety of the excavation part, a temporary support protective bracket is usually required to be arranged at the local part of the excavation part.
The conventional support protective support is manufactured by splicing and erecting two jacks of a pressurizer at the pressurizing position of a loose head according to the length required by design in a construction site through flange extension, positioning and pressurizing the two jacks of the pressurizer at the pressurizing position of the loose head after the two jacks meet the requirements, stopping pressurizing after the axial force is predicted by design, driving a steel wedge into a reserved hole of the loose head, decompressing and unloading the jacks, and dismantling the steel support in sequence after the construction is finished. The conventional support and protection bracket has the following disadvantages: (1) the disassembly and the assembly are inconvenient in a narrow space of the tunnel, and particularly the steel wedge at the bolt part of the movable head is not easy to disassemble under the pressurizing condition; (2) when the lateral construction is carried out on the connecting passage, the recoil force cannot be well provided for the shield tunneling machine, and the deformation is easily caused due to the uneven stress of the duct piece; (3) can not be used repeatedly; (4) the supporting axial force is difficult to adjust in the construction process.
Disclosure of Invention
The invention aims to provide a movable prestress supporting system which is movable and fast in supporting, can provide recoil for an interconnection tunnel boring machine, realizes longitudinal uniform distribution of load, realizes passive feedback of supporting and active control, and a using method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: a movable prestress support system comprises a main body frame type steel support, a reclining counter-force seat, an inverted arch counter-force seat, a construction side counter-force seat, an arch bottom counter-force seat, a support protection support base plate, an under-plate movable wheel rail and a wheel rail vertical telescopic device;
the main frame type steel support comprises 8 main structural columns which are enclosed into a rectangle, four main structural columns are arranged in parallel along the axial plane of the shield tunnel, and two main structural columns are arranged in parallel along the radial plane of the shield tunnel;
the rear leaning reaction seat comprises a transverse telescopic rear leaning reaction seat support and a rear leaning stress buffer block, the inner side of the rear leaning stress buffer block is connected with the adjacent side wall of the main structure column through the rear leaning reaction seat support, and the shape of the outer side surface of the rear leaning stress buffer block is attached to the inner wall of the shield tunnel;
the inverted arch counter force seat comprises a vertical telescopic inverted arch counter force seat support and an inverted arch stress buffering block, the bottom surface of the inverted arch stress buffering block is connected with the top of the main structure column through the inverted arch counter force seat support, and the top surface of the inverted arch stress buffering block is in fit with the inner wall of the shield tunnel;
the construction side reaction seat comprises a transverse telescopic construction side reaction seat support and two construction side stress buffer blocks which are symmetrically distributed, the inner sides of the construction side stress buffer blocks are connected with the adjacent side walls of the main structure columns through the construction side reaction seat support, the shapes of the outer side surfaces of the construction side stress buffer blocks are attached to the inner wall of the shield tunnel, and a space between the two construction side stress buffer blocks forms a shield machine construction hole;
the arch bottom counter-force seat comprises a vertical telescopic arch bottom counter-force seat support and an arch bottom stress buffer block, the arch bottom stress buffer block is connected with the bottom of the main structure column through the arch bottom counter-force seat support, and the bottom surface of the arch bottom stress buffer block is in fit with the inner wall of the shield tunnel;
the supporting and protecting support bottom plate is fixedly arranged at the lower end of the main structure column, and a groove for erecting a shield machine is arranged in the middle of the supporting and protecting support bottom plate;
the lower plate moving wheel rail is fixed at the bottom of the bottom plate of the supporting and protecting bracket through the wheel rail vertical telescopic device.
The main structure post with support protective bracket bottom plate between be provided with radial bearing diagonal post between the column sheet and the axial bearing diagonal post between the column sheet respectively, along two of shield tunnel axial symmetry the main structure post between be provided with the radial floor between the post, along shield tunnel radial symmetry and lie in adjacent two of lateral part the main structure post between be provided with the axial floor between the post. The rigidity of the whole structure and better stress transmission are ensured through the connection of the supporting columns and the rib plates.
The backrest counter-force seat support, the inverted arch counter-force seat support, the construction side counter-force seat support and the arch bottom counter-force seat support are all hydraulic jacks. Through adjusting the support, adaptable different tunnel sizes to the prestressing force size of adjustment applying to the shield tunnel inner wall.
The material of the rear leaning stress buffer block, the inverted arch stress buffer block, the construction side stress buffer block and the arch bottom stress buffer block is a steel block which is coated with a rubber buffer layer and the outer surface of the steel block is arc-shaped. The shape of the outer surface of the stress buffer block can be adjusted according to the shape of the tunnel, preferably adopting a circular arc shape, but the adjustability is kept to increase the application range of the support and protection bracket system.
The wheel rail vertical telescopic device is a servo jack with a mechanical lock.
The use method of the movable prestressed support system comprises the following specific steps:
(1) completely assembling the movable prestressed supporting system outside the hole or partially assembling the movable prestressed supporting system according to construction conditions;
(2) pushing the movable prestress support system to a construction point position through the movable wheel rail under the plate;
(3) ejecting a rear leaning stress buffer block, an inverted arch stress buffer block, a construction side stress buffer block and an arch bottom stress buffer block through corresponding counter force seat supports, respectively attaching the buffer blocks to the inner wall of the shield tunnel, moving the wheel rail downwards to be retracted and suspended, and fixing a movable prestress supporting system;
(4) erecting a shield machine in a middle groove of a bottom plate of a supporting and protecting bracket;
(5) the movable prestress support system provides recoil for the construction of the shield tunneling machine;
(6) after the construction is finished, the shield machine is disassembled and transported;
(7) withdrawing the rear leaning stress buffer block, the inverted arch stress buffer block, the construction side stress buffer block and the arch bottom stress buffer block through corresponding counter force seat brackets, extending the movable wheel rail under the plate out of the support, pushing the tunnel out through the movable wheel rail under the plate, or carrying out partial or complete splitting according to construction conditions and then transporting the tunnel out;
(8) and the movable prestressed supporting system is recycled to realize subsequent reutilization.
Compared with the prior art, the invention has the advantages that: the invention discloses a movable prestressed supporting system and a using method thereof for the first time, wherein the movable prestressed supporting system can be assembled in advance or pushed in after partial assembly is carried out according to construction conditions, and then the movable prestressed supporting system is completely assembled in a hole. The bottom plate is provided with a movable wheel rail, after the movable wheel rail is pushed to a construction point, the arch bottom stress buffer block is ejected out through a telescopic counter-force seat support, a wheel rail vertical telescopic device is retracted, the movable wheel rail is suspended, and the support is fixed. After the construction is finished, the arch bottom stress buffer block is recovered, the wheel rail vertical telescopic device extends out, the movable wheel rail falls to the ground, the support system moves fast to push out the tunnel, and the tunnel can be transported out after partial splitting or complete splitting according to construction conditions. The frame type steel support is formed by processing prefabricated parts outside the tunnel and assembling the prefabricated parts outside the tunnel and adjusting the steel support in the tunnel, is stable in structure, uniform in stress, reliable in strength and rigidity, capable of avoiding additional deformation of tunnel main bodies caused by tunnel inner side construction, adjustable in radius, capable of being repeatedly used after being disassembled and assembled, capable of reducing construction cost and improving economic benefits.
In conclusion, the movable prestress supporting system has the advantages of being movable, fast in supporting, capable of providing recoil for the communication channel heading machine, achieving longitudinal uniform distribution of load, achieving passive feedback of supporting and active control, and suitable for existing tunnels, and is convenient to support entering and disassemble in narrow space of the tunnel, and capable of achieving subsequent recycling of the support.
Drawings
FIG. 1 is a front view of the mobile pre-stressed support system of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of the mobile prestressed support system of the present invention;
FIG. 3 is a schematic perspective view of the movable prestressed supporting system according to the present invention;
FIG. 4 is a schematic illustration of the present invention in an existing tunnel;
FIG. 5 is a schematic diagram of an embodiment of the present invention installed in an existing tunnel;
FIG. 6 is a schematic top view of a shield machine constructed in an existing tunnel according to the present invention;
the parts are indicated by reference numerals:
1, a main body frame type steel support;
2, a backward leaning reaction seat, 21 backward leaning reaction seat brackets and 22 backward leaning stress buffer blocks;
3 an inverted arch counter-force seat, 31 inverted arch counter-force seat brackets and 32 inverted arch stress buffer blocks;
4 construction side reaction seat, 41 construction side reaction seat bracket and 42 construction side stress buffer block;
5 arch bottom reaction force seats, 51 arch bottom reaction force seat supports and 52 arch bottom stress buffer blocks;
6 supporting the bottom plate of the protective bracket;
7, moving wheel rails under the plate;
8 wheel rail vertical telescopic devices;
9, grooves;
10 radial oblique supporting columns between the column plates;
11 axial oblique supporting columns between the column plates;
12 inter-column radial ribs;
13 axial rib plates between the columns;
14 shield machine.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
A movable prestressed supporting system and a using method thereof are disclosed, as shown in figure 1, figure 2 and figure 3, the movable prestressed supporting system comprises a main frame type steel support 1, a reclining counter force seat 2, an inverted arch counter force seat 3, a construction side counter force seat 4, an arch bottom counter force seat 5, a supporting protection support bottom plate 6, a plate lower moving wheel rail 7 and a wheel rail vertical telescopic device 8;
the main frame type steel support 1 comprises 8 main structural columns which are enclosed into a rectangle, four main structural columns are arranged in parallel along the axial plane of the shield tunnel, and two main structural columns are arranged in parallel along the radial plane of the shield tunnel;
the reclining reaction seat 2 comprises a transverse telescopic reclining reaction seat support 21 and a reclining stress buffer block 22, the inner side of the reclining stress buffer block 22 is connected with the adjacent side wall of the main structure column through the reclining reaction seat support 21, and the shape of the outer side surface of the reclining stress buffer block 22 is attached to the inner wall of the shield tunnel;
the inverted arch reaction force seat 3 comprises a vertical telescopic inverted arch reaction force seat support 31 and an inverted arch stress buffering block 32, the bottom surface of the inverted arch stress buffering block 32 is connected with the top of the main structure column through the inverted arch reaction force seat support 31, and the top surface shape of the inverted arch stress buffering block 32 is attached to the inner wall of the shield tunnel;
the construction side reaction seat 4 comprises a transverse telescopic construction side reaction seat support 41 and two construction side stress buffer blocks 42 which are symmetrically distributed, the inner sides of the construction side stress buffer blocks 42 are connected with the adjacent side walls of the main structure columns through the construction side reaction seat support 41, the outer side surface shapes of the construction side stress buffer blocks 42 are attached to the inner wall of the shield tunnel, and a space between the two construction side stress buffer blocks 42 forms a shield machine construction hole;
the arch bottom reaction force seat 5 comprises a vertical telescopic arch bottom reaction force seat support 51 and an arch bottom stress buffer block 52, the arch bottom stress buffer block 52 is connected with the bottom of the main structure column through the arch bottom reaction force seat support 51, and the bottom surface shape of the arch bottom stress buffer block 52 is attached to the inner wall of the shield tunnel;
the supporting and protecting support bottom plate 6 is fixedly arranged at the lower end of the main structure column, and a groove 9 for erecting a shield machine 14 is arranged in the middle of the supporting and protecting support bottom plate 6;
the underfloor moving wheel rail 7 is fixed at the bottom of the supporting protection support bottom plate 6 through a wheel rail vertical telescopic device 8.
In this embodiment, as shown in fig. 1, 2 and 3, an inter-column-slab radial diagonal support column 10 and an inter-column-slab axial diagonal support column 11 are respectively disposed between the main structural columns and the supporting and protecting support bottom plate 6, an inter-column radial rib plate 12 is disposed between two main structural columns that are axially symmetric along the shield tunnel, and an inter-column axial rib plate 13 is disposed between two adjacent main structural columns that are radially symmetric along the shield tunnel and located at the side.
In this embodiment, the reclining reaction seat support 21, the inverted arch reaction seat support 31, the construction-side reaction seat support 41, and the arch-bottom reaction seat support 51 are all hydraulic jacks, and the supports can be adjusted to adapt to different tunnel sizes and adjust the magnitude of the prestress applied to the inner wall of the shield tunnel. The materials of the rear leaning stress buffer block 22, the inverted arch stress buffer block 32, the construction side stress buffer block 42 and the arch bottom stress buffer block 52 are all steel blocks which are coated with rubber buffer layers and the outer surface of each steel block is in the shape of a circular arc, the outer surface of each stress buffer block can be adjusted according to the shape of a tunnel, preferably, the shape of the outer surface of each steel block is in the shape of a circular arc, and the adjustability of each steel block is reserved so as to increase the application range of the support protection support system. The wheel-rail vertical telescopic device 8 is a servo jack with a mechanical lock.
The implementation process of the movable prestressed supporting system is shown in fig. 4, 5 and 6, and the specific steps are as follows:
(1) completely assembling outside the hole or partially assembling according to construction conditions;
(2) the wheel rail 7 is moved under the plate to be pushed to a construction point position;
(3) the rear leaning stress buffer block 22, the inverted arch stress buffer block 32, the construction side stress buffer block 42 and the arch bottom stress buffer block 52 are ejected out through corresponding counter force seat supports and are respectively attached to the inner wall of the shield tunnel, the movable wheel rail 7 under the plate is withdrawn and suspended, and the movable prestress supporting system is fixed;
(4) a shield machine 14 is erected in the middle groove 9 of the supporting and protecting support bottom plate 6;
(5) the movable prestress supporting system provides recoil for the construction of the shield tunneling machine 14 and guarantees the integral rigidity of the construction tunnel section;
(6) after the construction is finished, the shield tunneling machine 14 is disassembled;
(7) the rear leaning stress buffer block 22, the inverted arch stress buffer block 32, the construction side stress buffer block 42 and the arch bottom stress buffer block 52 are retracted through corresponding counter force seat supports, the lower plate moving wheel rail 7 extends out of the support, and the tunnel is pushed out through the lower plate moving wheel rail 7, or is transported out of the tunnel after being partially or completely split according to construction conditions;
(8) and the movable prestressed supporting system is recycled to realize subsequent reutilization.
The above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (6)
1. A movable prestressing force braced system which characterized in that: the device comprises a main frame type steel support, a backrest counter-force seat, an inverted arch counter-force seat, a construction side counter-force seat, an arch bottom counter-force seat, a support protection support bottom plate, an underfloor moving wheel rail and a wheel rail vertical telescopic device; the main frame type steel support comprises 8 main structural columns which are enclosed into a rectangle, four main structural columns are arranged in parallel along the axial plane of the shield tunnel, and two main structural columns are arranged in parallel along the radial plane of the shield tunnel; the rear leaning reaction seat comprises a transverse telescopic rear leaning reaction seat support and a rear leaning stress buffer block, the inner side of the rear leaning stress buffer block is connected with the adjacent side wall of the main structure column through the rear leaning reaction seat support, and the shape of the outer side surface of the rear leaning stress buffer block is attached to the inner wall of the shield tunnel; the inverted arch counter force seat comprises a vertical telescopic inverted arch counter force seat support and an inverted arch stress buffering block, the bottom surface of the inverted arch stress buffering block is connected with the top of the main structure column through the inverted arch counter force seat support, and the top surface of the inverted arch stress buffering block is in fit with the inner wall of the shield tunnel; the construction side reaction seat comprises a transverse telescopic construction side reaction seat support and two construction side stress buffer blocks which are symmetrically distributed, the inner sides of the construction side stress buffer blocks are connected with the adjacent side walls of the main structure columns through the construction side reaction seat support, the shapes of the outer side surfaces of the construction side stress buffer blocks are attached to the inner wall of the shield tunnel, and a space between the two construction side stress buffer blocks forms a shield machine construction hole; the arch bottom counter-force seat comprises a vertical telescopic arch bottom counter-force seat support and an arch bottom stress buffer block, the arch bottom stress buffer block is connected with the bottom of the main structure column through the arch bottom counter-force seat support, and the bottom surface of the arch bottom stress buffer block is in fit with the inner wall of the shield tunnel; the supporting and protecting support bottom plate is fixedly arranged at the lower end of the main structure column, and a groove for erecting a shield machine is arranged in the middle of the supporting and protecting support bottom plate; the lower plate moving wheel rail is fixed at the bottom of the bottom plate of the supporting and protecting bracket through the wheel rail vertical telescopic device.
2. The moveable prestressed support system of claim 1, wherein: the main structure post with support protective bracket bottom plate between be provided with radial bearing diagonal post between the column sheet and the axial bearing diagonal post between the column sheet respectively, along two of shield tunnel axial symmetry the main structure post between be provided with the radial floor between the post, along shield tunnel radial symmetry and lie in adjacent two of lateral part the main structure post between be provided with the axial floor between the post.
3. The moveable prestressed support system of claim 1, wherein: the backrest counter-force seat support, the inverted arch counter-force seat support, the construction side counter-force seat support and the arch bottom counter-force seat support are all hydraulic jacks.
4. The moveable prestressed support system of claim 1, wherein: the material of the rear leaning stress buffer block, the inverted arch stress buffer block, the construction side stress buffer block and the arch bottom stress buffer block is a steel block which is coated with a rubber buffer layer and the outer surface of the steel block is arc-shaped.
5. The moveable prestressed support system of claim 1, wherein: the wheel rail vertical telescopic device is a servo jack with a mechanical lock.
6. The method of using the moveable pre-stressed support system of any one of claims 1-5, characterized by the following steps:
(1) completely assembling the movable prestressed support system of any one of claims 1-5 outside the hole or partially assembling according to construction conditions;
(2) pushing the movable prestress support system to a construction point position through the movable wheel rail under the plate;
(3) ejecting a rear leaning stress buffer block, an inverted arch stress buffer block, a construction side stress buffer block and an arch bottom stress buffer block through corresponding counter force seat supports, respectively attaching the buffer blocks to the inner wall of the shield tunnel, moving the wheel rail downwards to be retracted and suspended, and fixing a movable prestress supporting system;
(4) erecting a shield machine in a middle groove of a bottom plate of a supporting and protecting bracket;
(5) the movable prestress support system provides recoil for the construction of the shield tunneling machine;
(6) after the construction is finished, the shield machine is disassembled and transported;
(7) withdrawing the rear leaning stress buffer block, the inverted arch stress buffer block, the construction side stress buffer block and the arch bottom stress buffer block through corresponding counter force seat brackets, extending the movable wheel rail under the plate out of the support, pushing the tunnel out through the movable wheel rail under the plate, or carrying out partial or complete splitting according to construction conditions and then transporting the tunnel out;
(8) and the movable prestressed supporting system is recycled to realize subsequent reutilization.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811222194.4A CN109630175B (en) | 2018-10-19 | 2018-10-19 | Movable prestress supporting system and using method thereof |
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| CN201811222194.4A CN109630175B (en) | 2018-10-19 | 2018-10-19 | Movable prestress supporting system and using method thereof |
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| CN109630175A CN109630175A (en) | 2019-04-16 |
| CN109630175B true CN109630175B (en) | 2020-04-21 |
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| CN111173525B (en) * | 2020-03-05 | 2024-07-02 | 西南科技大学 | Supporting device for shield underpass building |
| CN113863269B (en) * | 2021-09-29 | 2022-12-20 | 铁科院(深圳)研究设计院有限公司 | Pipe shed for reinforcing rock-soil layer |
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| CN102644467B (en) * | 2012-04-27 | 2015-01-07 | 上海隧道工程股份有限公司 | Tunnel connecting passage construction method for directly cutting segment rings through pipe jacking machine |
| CN105041328B (en) * | 2015-07-29 | 2017-03-29 | 中铁工程装备集团有限公司 | It is a kind of for big horse-shoe tunnel can cast-in-place supporting shield machine |
| CN107060788A (en) * | 2016-09-19 | 2017-08-18 | 中铁隧道集团有限公司 | A kind of tunnel connection channel excavating device |
| CN206174961U (en) * | 2016-11-07 | 2017-05-17 | 中铁工程装备集团有限公司 | Tunnel contact is shield structure machine for passageway |
| CN106437735B (en) * | 2016-11-07 | 2018-06-01 | 中铁工程装备集团有限公司 | Tunnel connection channel shield machine and its service channel driving method |
| CN107288645B (en) * | 2017-08-07 | 2019-05-17 | 北京工业大学 | A kind of moveable model shielding machine initiator device of reaction support |
| CN107989623B (en) * | 2017-11-24 | 2019-10-08 | 上海市基础工程集团有限公司 | The mounting device and method leaned on after tunnel inner ring type |
| CN108397201A (en) * | 2018-01-31 | 2018-08-14 | 中铁二十二局集团第工程有限公司 | The safe construction method of rock tunnel(ling) machine |
| CN108590695B (en) * | 2018-05-30 | 2023-05-23 | 中山大学 | Communication channel shield construction method and communication channel |
| CN108691553B (en) * | 2018-06-12 | 2024-02-20 | 中铁工程装备集团有限公司 | Rectangular-like pipe jacking machine for construction of connecting channel |
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Application publication date: 20190416 Assignee: Guangzhou Metro Design and Research Institute Co.,Ltd. Tianjin Branch Assignor: NINGBO YONGGONG INTELLIGENT TECHNOLOGY Co.,Ltd. Contract record no.: X2024980004801 Denomination of invention: A movable prestressed support system and its usage method Granted publication date: 20200421 License type: Common License Record date: 20240423 |
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