CN111997646A - Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof - Google Patents
Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof Download PDFInfo
- Publication number
- CN111997646A CN111997646A CN202011033144.9A CN202011033144A CN111997646A CN 111997646 A CN111997646 A CN 111997646A CN 202011033144 A CN202011033144 A CN 202011033144A CN 111997646 A CN111997646 A CN 111997646A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- supporting
- construction
- pipe curtain
- temporary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention discloses a mine method supporting structure for running high-speed rail by underpass, which comprises a pipe curtain structure, primary support and secondary lining; the secondary lining is positioned on the inner side of the primary support, and the pipe curtain structure is positioned on the outer side of the primary support and distributed on the top and the side of the primary support structure; temporary support steel frames which are transversely and vertically staggered are further arranged in the tunnel and are used as temporary supports for tunnel excavation; the top of the constructed section structure at the two ends of the tunnel is respectively provided with a tip ring beam structure, and the two ends of the pipe curtain structure are fixed on the corresponding tip ring beam structure as supporting points. The invention also discloses a construction method of the mine method supporting structure for running high-speed rail by underpass. The construction method adopts the combination of primary support, temporary support and secondary lining as a tunnel support structure, adopts the pipe curtain as pre-support and adopts the construction method of subsection excavation in the tunnel, and has the advantages of strong sedimentation control capability and safe and reliable construction compared with the common mine method tunnel.
Description
Technical Field
The invention belongs to the technical field of mine method tunnel construction, and particularly relates to a mine method tunnel supporting structure for running high-speed rail through and a construction method thereof.
Background
With the rapid development of traffic infrastructure construction, newly-built tunnels meet the complex working conditions of more and more ground structures such as railways, buildings, roads and the like. Particularly, when the railway line in the underpass operation, especially a high-speed railway, is improperly selected by engineering measures, large ground surface settlement or uneven settlement can be caused, the line is deformed to exceed the limit and needs to be operated at a limited speed, and a large safety accident is caused if the line is deformed to exceed the limit, so that the life and property safety of people is seriously threatened.
At the present stage, the cross section of each type of tunnel is large, on one hand, the faced geological condition is relatively complex, on the other hand, the measures which can be taken are limited due to the limitation of the line arrangement condition, and although the application of the shield construction method has high construction speed and mature technology, the shield construction method is not economical in the construction of short-distance and large-section tunnels. The pipe curtain is used as a construction measure for crossing roads, railways, structures, airports and the like, can greatly reduce the influence of construction on ground activities and other underground construction and pipelines, and has the advantages of no noise and vibration during construction, no need of reducing underground water level, no influence on normal use of upper construction, effective control of ground settlement, reduction of influence on the surrounding environment and the like.
However, the method of using the pipe curtain to wear important facilities at the present stage has the following problems: for rectangular tunnels with extremely high requirements on settlement control, such as a low-speed rail, the construction of jacking or open excavation and cast-in-place after track underpinning is generally adopted, and the construction by a mining method is only selected. Firstly, the conventional pipe curtain auxiliary underground excavation construction technology only depends on a pipe curtain structure as an advance support for a rectangular section tunnel, and the safety of the tunnel in the construction period and the safety of a ground surface building structure are difficult to guarantee; secondly, for the projects such as a low-speed rail penetrating machine which is extremely sensitive to stratum settlement, the conventional pipe curtain method tunnel construction may cause overlarge stratum settlement to influence the operation of railways, corresponding auxiliary measures are required to be taken for processing in the aspect of settlement control, and meanwhile, the safety problem of large-section tunnel construction is solved by combining the situation that the section form and the size of the tunnel at the present stage are various.
Disclosure of Invention
Aiming at the defects or improvement requirements in the prior art, the invention provides a mine method tunnel supporting structure for running high-speed rail downwards and a construction method thereof.
In order to achieve the above object, according to one aspect of the present invention, there is provided a mine method supporting structure for running high-speed rail by underpass, comprising a pipe curtain structure, primary supports, and a secondary lining; wherein the content of the first and second substances,
the secondary lining is positioned on the inner side of the primary support, and the pipe curtain structure is positioned on the outer side of the primary support and distributed on the top and the side of the primary support structure; temporary support steel frames which are transversely and vertically staggered are further arranged in the tunnel and are used as temporary supports for tunnel excavation;
the top of the constructed section structure at the two ends of the tunnel is respectively provided with a tip ring beam structure, and the two ends of the pipe curtain structure are fixed on the corresponding tip ring beam structure as supporting points.
Furthermore, a primary support steel frame is arranged in the primary support, one end of a vertical temporary support steel frame is fixed with the primary support steel frame at the top, and the other end of the vertical temporary support steel frame is supported at the bottom of the tunnel; two ends of the transverse temporary support steel frame are respectively fixed on the primary support steel frames at two transverse sides of the tunnel.
Furthermore, the joints of the temporary support steel frames and the primary support steel frames and the joints of the transverse temporary support steel frames and the vertical temporary support steel frames are fixed by steel frame joints.
Furthermore, a foot locking steel pipe is further arranged at the joint of the transverse and vertical temporary support steel frame.
Furthermore, the temporary support steel frame divides the section of the tunnel into a plurality of parts, so that when the tunnel is excavated, according to the divided parts, the tunnel excavation is carried out according to the sequence of the two sides, the middle and the top and the bottom.
Furthermore, a plurality of end ring beam supporting piles are arranged at the bottom of the end ring beam structure.
Furthermore, a waterproof device is arranged at the joint of the pipe curtain structure and the end ring beam structure.
According to another aspect of the invention, a construction method of a mine-method supporting structure for running high-speed rail under is provided, which comprises the following steps:
s1, constructing a working well and a foundation pit excavated by slope release, and taking the foundation pit as a tunnel construction working surface;
s2, constructing an end ring beam structure on the two-end constructed section structure, and supporting and fixing the pipe curtain structure;
s3, constructing a pipe curtain structure, fixing the pipe curtain structure with the corresponding end ring beam structure, and constructing a water stopping and fixing device at the joint of the end ring beam structure and the pipe curtain structure;
s4, performing tunnel excavation and block construction, wherein construction is performed sequentially from two sides to the middle and from top to bottom, and the block span can be properly adjusted according to the settlement control requirement;
s5, constructing a secondary lining, wherein the secondary lining is constructed in sections from bottom to top, and the temporary support steel frame is correspondingly dismantled;
s6 the steps S4 and S5 are circulated, and the next section of tunnel is excavated.
Further, in step S4, during each construction, the method specifically includes the following steps:
after core soil is reserved in a tunnel and excavated, a primary supporting structure is constructed in advance, concrete is sprayed, temporary supporting steel frames are arranged among all blocks, steel frames are connected stably through steel frame joints, and locking steel pipes are arranged at the bottoms of the steel frames.
Further, in step S5, the secondary lining should follow the excavated tunnel face as closely as possible so that the constructed segment structure can be used as a supporting point of the pipe curtain structure.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the mine-method tunnel supporting structure for running high-speed rails in a downward-penetrating mode adopts a pipe curtain structure as an advanced pre-supporting structure, two ends of the pipe curtain are fixed through end ring beam structures arranged on a constructed section, and the primary supporting and secondary lining are combined.
(2) According to the mine-method tunnel supporting structure for running high-speed rails through underpass, the temporary supporting steel frames which are staggered transversely and vertically are arranged at intervals inside the mine-method tunnel supporting structure, and the temporary supporting steel frames are fixedly connected with the supports in the primary support, so that the temporary supporting effect during excavation can be achieved on the end face of the rectangular tunnel on one hand through the temporary supporting steel frames, and on the other hand, the end face is divided into a plurality of parts through the temporary supporting steel frames, so that the whole construction is divided by the temporary supporting steel frames, and excavation is performed in sections by sectioning from top to bottom according to the sequence of sectioning from two sides.
(3) The construction method of the mine-method tunnel supporting structure for running high-speed rail in a downward-penetrating mode adopts pipe curtains with ring beam structures at two ends as supporting points as advanced pre-supports, flexibly adopts a subsection and block-dividing excavation method in a tunnel, ensures construction safety and controllable deformation of a surface railway by controlling the excavation step pitch and the distance between an excavation surface and two linings, and has the advantages of safety, reliability and strong settlement control capability.
(4) According to the construction method of the mine tunnel supporting structure for running high-speed rail in a downward-penetrating mode, the construction is carried out by adopting the sub-blocks, the sub-blocks can be flexibly adjusted according to the requirements of span, height and settlement control, and the construction method has the advantage of strong adaptability; the requirement on the settlement control standard is low, the vertical support can be arranged to be 6-8 m, and the horizontal support is cancelled; the vertical supports are arranged to be 3-4 m and have the pipe diameter of 800-1000 mm under the condition of high settlement requirement control of a lower-crossing road, a railway and the like, and the settlement control capability is favorably enhanced.
Drawings
FIG. 1 is a schematic diagram of a mine-method supporting structure for running high-speed rail by underpass in an embodiment of the invention;
fig. 2 is a schematic cross-sectional view of steel frames and excavation sequence related to a mine-method supporting structure for running high-speed rails through a lower pass in an embodiment of the invention;
FIG. 3 is a schematic longitudinal sectional view of a mine-method supporting structure for running high-speed rail by underpass in the embodiment of the invention;
fig. 4 is a schematic structural view of an end ring beam and a support pile related to a mine-method support structure for running high-speed rail through the lower part in the embodiment of the invention;
fig. 5 is a schematic connection diagram of pipe curtain structures related to a mine method supporting structure for running high-speed rail by underpass in the embodiment of the invention.
In all the figures, the same reference numerals denote the same features, in particular: the method comprises the following steps of 1-pipe curtain structure, 2-primary support, 3-secondary lining, 4-primary support steel frame, 5-temporary support steel frame, 6-secondary lining construction joint, 7-steel frame joint, 8-locking steel pipe, 9-constructed section structure, 10-excavation face, 11-end ring beam structure and 12-end ring beam support pile.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Aiming at the defects of a common mining method construction method, the application provides a tunnel supporting structure of primary supporting, temporary supporting and secondary lining combined supporting for an operation high-speed railway and the like which are penetrated under a tunnel and are sensitive to sedimentation, and a construction method of adopting a pipe curtain as a pre-supporting and adopting subsection excavation in the tunnel. Fig. 1 is a mine method supporting structure for running high-speed rail by underpass in an embodiment of the present invention. As shown in the figure, the mine method supporting structure for running high-speed rail by underpass comprises a pipe curtain structure 1, a primary support 2, a secondary lining 3, a primary support steel frame 4, a temporary support steel frame 5, an end ring beam structure 11 and the like.
Specifically, the secondary lining 3 is located on the inner side of the primary support 2, and the secondary lining 3 is separately arranged on the top and the side of the inner side of the primary support 1 and also arranged on the bottom surface of the tunnel. The pipe curtain structures 1 are located on the outer side of the primary support 2 and distributed on the top and the side edges of the primary support 2, the mutual connection structural schematic diagram between the pipe curtain structures 1 is shown in fig. 5, and two adjacent pipe curtain structures 1 are connected through mutually matched connecting pieces.
Fig. 2 is a schematic cross-sectional view of steel frames and an excavation sequence related to a mine method supporting structure for running high-speed rails through underpass in an embodiment of the invention, and as shown in fig. 2, a primary supporting steel frame 4 is arranged in a primary support 2, the mine method supporting structure further comprises temporary supporting steel frames 5, the temporary supporting steel frames 5 are transversely and vertically arranged in a staggered manner, wherein one end of each vertical temporary supporting steel frame 5 is fixed with the primary supporting steel frame 4 at the top through a steel frame joint 7, and the other end of each vertical supporting steel frame 5 is supported at the bottom of a tunnel; two ends of a transverse temporary support steel frame 5 are respectively fixed on primary support steel frames 4 at two sides of the tunnel and are fixed through steel frame joints 7; handing-over department between horizontal and vertical temporary support steelframe 5, the steelframe that passes through equally connects 7 fixedly to handing-over department still is equipped with lock foot steel pipe 8, further strengthens strutting in the tunnel. In the tunnel longitudinal direction, temporary support steel frames 5 are arranged at certain intervals.
In a preferred embodiment of the invention, two temporary support steel frames 5 are vertically arranged, one temporary support steel frame 5 is transversely arranged, the transverse and vertical primary support steel frames divide a rectangular section of an excavated tunnel into six parts, soil bodies on the upper parts of the two transverse sides are excavated firstly, soil bodies on the lower parts corresponding to the two transverse sides are excavated, soil bodies on the upper middle parts are excavated, and finally soil bodies on the bottom middle parts are excavated when the tunnel is excavated according to the sequence of a, b, c and d; namely, the two sides are arranged first, the middle is arranged second, and the upper part is arranged first, and the lower part is arranged second. The mine method supporting structure is suitable for the tunnel with the rectangular section, and the soil body in the middle can serve as a supporting function due to the fact that the transverse span of the rectangular section is long, and the stability in the excavation process is improved.
The secondary lining is divided into four parts from e to g, namely a top section, a bottom section and two side surface sections; after the soil body excavation from a to d is finished, secondary lining is carried out according to the sequence of e, f and g, namely according to the sequence of a bottom section, a side section and a top section.
Fig. 3 is a schematic longitudinal sectional structure view of a mine-method supporting structure for running high-speed rail by underpass in the embodiment of the invention. Fig. 4 is a schematic structural view of an end ring beam and a support pile related to a mine-method support structure for running high-speed rail through the lower part in the embodiment of the invention. According to the mine method tunnel supporting structure, the open excavation method is adopted at two ends of the tunnel, a working well or a foundation pit excavated by slope excavation can be constructed in advance to serve as a working surface for tunnel construction, and tunnel construction is respectively carried out from two ends of the tunnel. The top of the section structure 9 that has been constructed at both ends is equipped with tip collar tie beam structure 11 respectively for the pipe curtain structure 1 at fixed top is equipped with the steel reinforcement cage in the pipe curtain structure 1 and is used for pouring into the concrete, in order to increase supporting construction's rigidity, pipe curtain structure 1 both ends are fixed in on the tip collar tie beam structure 11 and are regarded as stable strong point, have reduced the settlement of tunnel excavation in-process. The bottom of the end ring beam structure 11 is transversely provided with a plurality of end ring beam supporting piles 12 which play a role in temporarily supporting the end ring beam structure 11.
Preferably, the joint of the pipe curtain structure 1 and the end ring beam structure 11 is provided with a waterproof device, so as to play a role in waterproof and water-proof.
The mine method supporting structure for running high-speed rail by underpass has the advantages that the pipe curtain structure is adopted as an advanced pre-supporting structure, two ends of the pipe curtain are fixed through the end ring beam structure arranged on the constructed section, and the primary support and the secondary lining are combined, so that the mine method supporting structure has the advantages of strong settlement control capability and safe and reliable construction compared with a common mine method tunnel.
According to the mine method supporting structure for running high-speed rails through underpass, the temporary supporting steel frames which are staggered transversely and vertically are arranged at intervals inside the mine method supporting structure, the temporary supporting steel frames are fixedly connected with the supports in the primary support, on one hand, the temporary supporting effect during excavation can be achieved on the end face of the rectangular tunnel through the temporary supporting steel frames, on the other hand, the end face is divided into a plurality of parts through the temporary supporting steel frames, so that the temporary supporting steel frames are used as boundaries in the whole construction, and the excavation is carried out in a segmented mode from top to bottom according to the mode that the temporary supporting steel frames are.
The invention relates to a mine method supporting structure for running high-speed rail by underpass, which is implemented by the following steps:
(1) constructing a working well or a foundation pit excavated by slope putting, and taking the foundation pit as a tunnel construction working surface, wherein the size of the position space is determined by the space required by a construction machine of the pipe curtain structure 1;
(2) constructing an end part ring beam structure 11 on the two end constructed section structures 9 for supporting and fixing the pipe curtain structure 1, wherein the end part ring beam structure has a stable foundation and certain rigidity, and arranging pipe curtain initiation and receiving related equipment at the end part;
(3) constructing the pipe curtain structure 1, fixing the pipe curtain structure 1 with the corresponding end ring beam structure 11, and constructing a water stopping and fixing device at the joint of the end ring beam structure 11 and the pipe curtain structure 1;
the arrangement of the pipe curtain structure 1 is adjusted according to the section of the tunnel structure, and the diameter and the wall thickness of the pipe curtain structure are determined according to external load conditions and settlement control requirements;
(4) after the construction of the pipe curtain structure 1 and the end ring beam structure 11 is completed, tunnel excavation construction is carried out, the excavation sequence is generally determined according to the span and the height of the tunnel structure, and the longitudinal construction range of each part is determined according to the requirements of construction machines and the rigidity of the primary support 2 and the temporary support steel frame 5; the block construction sequence is constructed according to the principle that two sides are firstly constructed, then the middle is constructed, and the upper part is constructed and the lower part is constructed, so that the block span can be properly reduced according to the settlement control requirement;
during construction of each part, after core soil is reserved for excavation, a primary support structure 2 is constructed in advance, and sprayed concrete construction is carried out, wherein the distance between primary support steel frames 4 and the thickness of sprayed concrete are determined according to the requirement of overlying load and the target deformation value of a tunnel structure, temporary support steel frames 5 are arranged among all the blocks, the steel frames are connected and stabilized through steel frame joints 7, foot locking steel pipes 8 are arranged at the bottoms of the steel frames, front and rear steps, left and right steps are staggered to a certain degree during excavation of the blocks, and the staggered distance is determined according to the rigidity of a pipe curtain support structure;
the construction is carried out by adopting the sub-blocks, and the sub-blocks can be flexibly adjusted according to the requirements of span, height and settlement control, so that the construction method has the advantage of strong adaptability. The requirement on the settlement control standard is low, the vertical supports can be arranged to be 6-8 m, the horizontal supports are omitted, the pipe diameter is 600mm, the settlement requirement on a downward-crossing road, a railway and the like is controlled to be high, the vertical supports are arranged to be 3-4 m, the pipe diameter is 800-1000 mm, and the settlement control capability is enhanced;
(5) constructing a secondary lining 3 and dismantling the temporary support steel frame 5, wherein the secondary lining 3 is constructed in sections from bottom to top, so that the temporary support steel frame 5 is prevented from being dismantled in a large range at one time, and during construction of the secondary lining 3, structural back waterproofing and secondary lining construction joint 6 position waterproofing are required;
the secondary lining 3 is used as a main supporting structure of the tunnel and is close to the excavation face 10 as far as possible, so that the constructed section structure 9 can be used as a supporting point of the pipe curtain structure 1 to effectively control the settlement amount during construction, and the distance between the secondary lining 3 and the excavation face 10 is determined according to the rigidity of the pipe curtain structure and the rigidity of the supporting structure;
(6) and (5) circulating the steps (4) and (5) and excavating the next part of tunnel.
According to the facility method for the mine method supporting structure for running the high-speed rail in the downward penetration mode, the two ends of the tunnel are constructed by the open cut method, a working well or a foundation pit excavated by slope relief can be constructed in advance and used as a tunnel construction working surface, a ring beam at the end part of a pipe curtain is constructed, a water blocking structure is installed during the pipe curtain construction period, and meanwhile, the water blocking structure is used as an end part fixing structure after the construction is finished. Carry out the construction of pipe curtain top advance in the foundation ditch, execute after the construction of pipe curtain and do pipe curtain tip watertight fittings, both ends are fixed in and are regarded as stable strong point on the pipe curtain ring roof beam, establish the steel reinforcement cage in the pipe curtain and pour into concrete in order to increase supporting construction rigidity, reduce the settlement among the tunnel excavation process.
The facility method of the mine method supporting structure for running the high-speed rail in a downward-penetrating mode is characterized in that tunnel excavation construction is carried out after pipe curtain construction is finished, the tunnel excavation construction is carried out in a sub-block mode, the number and the size of the sub-blocks are determined according to the span and the height of a tunnel, and the sub-block construction is carried out in the principle of firstly carrying out two sides and then carrying out middle, and then carrying out upward and downward. During each piece of construction, after reserving core soil and excavating, constructing a primary supporting structure in advance and performing concrete spraying construction; and (3) excavating in parts according to the arrangement of steps in front and back, left and right, and determining the step layout and the distance between the secondary lining and the tunnel face according to the structural rigidity of the pipe curtain and the structural rigidity of the supporting structure. After the primary support is constructed step by step, a ring secondary lining structure is constructed next to the primary support, and waterproof measures are taken.
The invention adopts the pipe curtain with the ring beam structures at the two ends as the supporting points as the advanced pre-support, flexibly adopts a subsection and block excavation method in the tunnel, ensures the construction safety and the controllable deformation of the surface railway by controlling the excavation step pitch, the excavation surface and the distance between the two linings, and has the advantages of safety, reliability and strong settlement control capability. Compared with the existing open excavation tunnel, the construction method of underground excavation by adopting a tunnel mine method has smaller influence on ground surface construction structures such as railways and the like, and the removal of surface construction structures or the speed-limited operation of railways can be avoided.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A mine method supporting structure for running high-speed rail under a tunnel is characterized by comprising a pipe curtain structure (1), a primary support (2) and a secondary lining (3); wherein the content of the first and second substances,
the secondary lining (3) is positioned on the inner side of the primary support (2), and the pipe curtain structure (1) is positioned on the outer side of the primary support (2) and distributed on the top and the side edges of the primary support (2); temporary support steel frames (5) which are transversely and vertically staggered are further arranged in the tunnel and are used as temporary supports for tunnel excavation;
the top of the tunnel two-end constructed section structure is respectively provided with a tip ring beam structure (11), and the two ends of the pipe curtain structure (1) are fixed on the corresponding tip ring beam structure (11) as supporting points.
2. The mining method supporting structure of a underpass operation high-speed railway according to claim 1, wherein a primary supporting steel frame (4) is arranged in the primary support (2), one end of a vertical temporary supporting steel frame (5) is fixed with the primary supporting steel frame (4) at the top, and the other end of the vertical temporary supporting steel frame is supported at the bottom of a tunnel; two ends of the transverse temporary support steel frame (5) are respectively fixed on the primary support steel frames (4) at two transverse sides of the tunnel.
3. The mining method supporting structure of a underpass high-speed railway according to claim 2, wherein the joint of the temporary support steel frame (5) and the primary support steel frame (4) and the joint of the transverse and vertical temporary support steel frames (5) are fixed by steel frame joints (7).
4. The mine-method supporting structure for running high-speed rails downwards according to any one of claims 1 to 3, wherein a locking steel pipe (8) is further arranged at the joint of the transverse and vertical temporary supporting steel frames (5).
5. The mining method supporting structure for underpass operation of high-speed railway according to claim 4, wherein the temporary supporting steel frames (5) divide the section of the tunnel into a plurality of parts, so that when the tunnel is excavated, according to the divided parts, the excavation is performed in the order of two sides first, then the middle, and then the top and the bottom.
6. The mining method supporting structure of a underpass operating high-speed railway according to claim 1 or 5, characterized in that a plurality of end ring beam supporting piles (12) are arranged at the bottom of the end ring beam structure (11).
7. The mining method supporting structure for underpass operation of high-speed railway according to claim 6, characterized in that a waterproof device is arranged at the joint of the pipe curtain structure (1) and the end ring beam structure (11).
8. A construction method of a mine method supporting structure for running high-speed rail by underpass is characterized by comprising the following steps:
s1, constructing a working well and a foundation pit excavated by slope release, and taking the foundation pit as a tunnel construction working surface;
s2, constructing an end ring beam structure (11) on the two-end constructed section structure, and supporting and fixing the pipe curtain structure (1);
s3, constructing a pipe curtain structure (1), fixing the pipe curtain structure with the corresponding end ring beam structure (11), and constructing a water stopping and fixing device at the joint of the end ring beam structure (11) and the pipe curtain structure (1);
s4, performing tunnel excavation and block construction, wherein construction is performed sequentially from two sides to the middle and from top to bottom, and the block span can be properly adjusted according to the settlement control requirement;
s5, constructing a secondary lining (3), wherein the secondary lining (3) is constructed in sections from bottom to top, and the temporary support steel frame (5) is correspondingly dismantled;
s6 the steps S4 and S5 are circulated, and the next section of tunnel is excavated.
9. The construction method of a mine-method supporting structure for running high-speed rail by underpass according to claim 8, wherein in the step S4, each construction step specifically comprises the following steps:
after core soil is reserved in a tunnel and excavated, a primary supporting structure (2) is constructed in advance, concrete is sprayed, temporary supporting steel frames (5) are arranged among all blocks, steel frame joints (7) are adopted among the steel frames for connection and stabilization, and foot locking steel pipes (8) are arranged at the bottoms of the steel frames.
10. The method of constructing a mine-method supporting structure for running high-speed rails downwards according to any one of claims 8 or 9, wherein in step S5, the secondary lining (3) should follow the excavated tunnel face (10) as closely as possible so that the constructed section structure (9) can serve as a supporting point for the pipe-roof structure (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011033144.9A CN111997646A (en) | 2020-09-27 | 2020-09-27 | Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011033144.9A CN111997646A (en) | 2020-09-27 | 2020-09-27 | Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111997646A true CN111997646A (en) | 2020-11-27 |
Family
ID=73474937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011033144.9A Pending CN111997646A (en) | 2020-09-27 | 2020-09-27 | Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111997646A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153355A (en) * | 2021-04-26 | 2021-07-23 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for down-penetrating tunnel forepoling curtain |
| CN114542091A (en) * | 2022-04-26 | 2022-05-27 | 中国铁路设计集团有限公司 | Advanced pre-support construction method and structure for small-caliber pipe curtain of underground excavation close-connection project |
-
2020
- 2020-09-27 CN CN202011033144.9A patent/CN111997646A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153355A (en) * | 2021-04-26 | 2021-07-23 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for down-penetrating tunnel forepoling curtain |
| CN113153355B (en) * | 2021-04-26 | 2023-09-08 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for advanced pipe curtain of underpass tunnel |
| CN114542091A (en) * | 2022-04-26 | 2022-05-27 | 中国铁路设计集团有限公司 | Advanced pre-support construction method and structure for small-caliber pipe curtain of underground excavation close-connection project |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110630283B (en) | Three-layer supporting structure suitable for double-arch tunnel and construction method | |
| CN106907159A (en) | A kind of Shallow Covered Metro Station separates open type structure and its construction method | |
| CN105041349A (en) | Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel | |
| CN109723443B (en) | Tunnel construction method | |
| CN105862930B (en) | A kind of protection structure to creating existing tunnel below underground engineering | |
| CN106567718A (en) | Construction method for composite stratum single-arch super long-span subway station through groove broaching and support substitution | |
| CN109989767A (en) | The ruggedized construction and construction method of existing railway are worn under Large span tunnel | |
| CN111101540B (en) | Construction method for passing existing electric power tunnel on open cut tunnel | |
| CN110439590A (en) | Method for tunnel construction | |
| CN109707388B (en) | Method for preventing ground collapse when shield tunneling machine starts to pass through existing shield tunnel | |
| CN111997646A (en) | Mine method tunnel supporting structure for running high-speed rail through lower part and construction method thereof | |
| US20240003254A1 (en) | Vertical orthogonal top exhausting air duct structure of deeply-buried subway station and construction method therefor | |
| CN107514262A (en) | The construction method of shield piping lane | |
| CN105464685A (en) | Cave-pile method bored tunnel waterproof curtain and construction method thereof | |
| CN105888675A (en) | Construction method for shield crossing railway line | |
| CN113005918A (en) | Method for constructing large-span frame bridge by high filling of multi-strand railway in protective railway station | |
| CN112177635A (en) | Construction method of step multiple advanced small guide pipe and construction method of overlapped tunnel | |
| CN109339106B (en) | Construction method for open-cut and concealed-making integral lining | |
| CN216765941U (en) | Tunnel decompression load shedding structure under bias voltage state | |
| CN110486062A (en) | A kind of method of mechanical tunneling multilayer multispan underground engineering in weak soil | |
| CN115142403A (en) | Half-edge rock pile foundation hole-forming construction method | |
| CN212454436U (en) | Excavation station structure of tunnel-first station-later station pipe curtain hole pile method | |
| CN209704560U (en) | Build the scaffolding structure that an ultra shallow buries Large Underground space | |
| CN114542092A (en) | Shield receiving construction method without bottom plate structure | |
| CN212250051U (en) | Mine method tunnel supporting construction of operation high-speed railway is worn down |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |