CN114961743A - Large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method - Google Patents
Large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method Download PDFInfo
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- CN114961743A CN114961743A CN202210626483.0A CN202210626483A CN114961743A CN 114961743 A CN114961743 A CN 114961743A CN 202210626483 A CN202210626483 A CN 202210626483A CN 114961743 A CN114961743 A CN 114961743A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses a side-hole synchronous mileage construction method of a large-section tunnel by a double-side-wall pilot tunnel method, which comprises the following steps: excavating a left pilot tunnel; mounting a primary support; installing a distance measuring instrument and a display screen; ensuring that the actual construction data of the left pilot tunnel is consistent with the design data; excavating a right pilot tunnel; installing a primary support in the right pilot tunnel; installing a distance measuring instrument and a display screen; actual construction data in the right pilot tunnel is consistent with actual construction data in the left pilot tunnel; and excavating the middle pilot tunnel after the left pilot tunnel and the right pilot tunnel meet the space required by design and specification. The method provided by the invention utilizes the left pilot tunnel data as control data to effectively control the mileage of the single-truss grating excavated by the right pilot tunnel, thereby realizing the purpose of synchronous mileage of excavation. The method effectively solves the problem of the deviation of the connecting nodes of the grid of the middle pilot tunnel, ensures that the nodes of the left pilot tunnel, the right pilot tunnel and the grid of the middle pilot tunnel are positioned on the same vertical surface, further effectively connects the primary supports of the side pilot tunnels on two sides and the middle pilot tunnel, ensures the firmness and stability of the primary support structure, and is suitable for urban rail transit construction.
Description
Technical Field
The invention belongs to the field of building construction, relates to urban rail transit construction, and particularly relates to a side hole synchronous mileage construction method of a large-section tunnel by a double-side-wall pit guiding method.
Background
With the development of domestic rail transit, the situations of mutual intersection, parallel connection, co-construction and the like among all rail lines are increasing day by day. In order to save underground space development and facilitate transportation, newly-built underground structures are increasingly designed by adopting large-section tunnels. A large-section tunnel under a newly-built line is usually constructed by a double-side-wall pit guiding method, and the principle of the construction of the double-side-wall pit guiding method is as follows: the whole large section of the tunnel is divided into 6 pilot holes of left, middle and right small sections by two middle partitions for construction, the left pilot hole and the right pilot hole on the upper layer are constructed in advance, then the left pilot hole and the right pilot hole on the lower layer are constructed in advance, finally the middle pilot hole is constructed in an upper-lower mode, the middle pilot hole section is constructed in a connecting mode with the pilot holes on the two sides, and then the full section is formed.
The construction method has the following problems: firstly, the out-of-step construction problem exists between the side holes and the middle holes, and the initial support construction of the subsequent middle holes is influenced; secondly, primary support is mainly connected by virtue of grid node bolts, and asynchronous construction causes that the node bolts cannot be connected, so that the quality and effect of connection cannot be guaranteed by aid welding or lap welding; and constructing a double-side-wall pilot tunnel method by connecting 6 small pilot tunnels to form an integral stress system, wherein the middle pilot tunnel is a key link for connecting side holes to form an integral structure, and a stable foundation for primary support is ensured. There is a left side always in the upper layer pilot tunnel work progress, right entrance to a cave construction is asynchronous, reserve scute or steel sheet and well hole grid node not at same perpendicular facade, the unable installation of bolt or connection, use L type or U shaped steel muscle connection in-process, the welding of adoption all, can't guarantee the position and the direction and the overlap joint length and the welding quality of connecting when the finite space operation, and then produce both sides limit hole and well hole preliminary bracing and can not effectively be connected, and then influence the overall structure atress.
Therefore, in order to ensure the structural safety of the primary support and the effective connection of the grille of the middle tunnel and the side holes on the two sides, the invention needs to invent a side hole synchronous mileage construction method of the double-side-wall pilot tunnel of the large-section tunnel so as to solve the technical problems.
Disclosure of Invention
The invention provides a side hole synchronous mileage construction method of a large-section tunnel by a double-side-wall pit guiding method, which aims to solve the problems in the prior art.
The invention provides a side-hole synchronous mileage construction method of a large-section tunnel by a double-side-wall pit guiding method, which comprises the following steps of:
dividing the upper section of the tunnel into a left pilot tunnel, a middle pilot tunnel and a right pilot tunnel for construction;
step two, excavating a left pilot tunnel;
step three, installing a primary support in the left pilot tunnel;
fourthly, mounting a distance meter and a display screen on the primary support;
fifthly, ensuring that the actual construction data of the left pilot tunnel is consistent with the design data;
sixthly, excavating a right pilot tunnel
Excavating a right pilot tunnel after the left pilot tunnel enters a certain distance;
step seven, installing a primary support in the right pilot tunnel;
step eight, mounting a distance meter and a display screen on the primary support of the right pilot tunnel;
step nine, the actual construction data in the right pilot tunnel and the actual construction data in the left pilot tunnel are kept consistent; if the grid positions are inconsistent, adjusting the grid positions in the right pilot hole until the grid positions are consistent;
step ten, excavating middle pilot tunnels after the left pilot tunnels and the right pilot tunnels meet the space required by design and specification;
and step eleven, repeating the step two to the step eleven until the whole tunnel excavation is finished.
And in the third step, the primary support is a steel grating, three simultaneous gratings are installed in the left pilot hole, the mileage and the coordinate of each grating are recorded, and embedded parts are reserved at the positions of upper rows of bolt holes on the outer side of the third side wall connecting plate and the positions of lower rows of bolt holes on the arch crown connecting plate.
And measuring mileage and coordinate positions of each truss from the third truss, recording data, excavating the upper step to 3-5m, installing a distance meter at the position of the embedded part when excavating the lower step, wherein the distance between the distance meter and the main ribs in the row in the grating is 500mm, and well performing mechanical safety protection.
In the fourth step, when the step on the left pilot tunnel advances to 3-5m, a display screen is installed on the side wall, the data link is corrected, and the background data transmission is linked; the previously measured data is simultaneously transmitted to the control system.
And in the fourth step, the shielding control plates which are in one-to-one correspondence with the distance measuring instruments are installed on the tunnel face grating under construction according to the preset distance, and the positioning check data and the display screen design data are compared and corrected.
And in the fifth step, when the left pilot tunnel enters the ruler by 10-15m, starting the excavation of the right pilot tunnel.
And in the fifth step, the right pilot tunnel distance measuring instrument (2) and the display screen (3) are arranged on the shielding control plate (4) and are arranged in the same left pilot tunnel.
The data of the left pilot tunnel and the data of the face to be cut and excavated of the right pilot tunnel are synchronously updated and compared, so that the cut and construction mileage of the excavation is controlled, the effective correspondence of the mileage of the excavated side holes is further ensured, and the smooth construction of the grating of the middle pilot tunnel is ensured;
and the distance measuring instruments (2) in the left pilot tunnel and the right pilot tunnel are two in number and are respectively arranged on the side wall and the arch top in the tunnel.
Moreover, the data displayed by the display screen comprises: the method comprises the following steps of excavating the top of the left pilot tunnel, excavating the right pilot tunnel, and carrying out grating excavation on the left pilot tunnel and the right pilot tunnel.
The invention has the advantages and positive effects that:
1. the method adopts the side pilot holes on two sides firstly, and the middle pilot hole secondly can be constructed after the first pilot hole deviates the interval of the specification and the design requirement. And (3) controlling distance mileage and coordinates of each grid during construction of the side pilot tunnel, making corresponding records, indicating the design position of each grid through data transmission in the tunnel, and displaying the design position on a display screen in the tunnel. After the construction of the front three grilles in the side guide hole is finished, relevant data are recorded, a distance meter is installed at each of the side wall and the arch top, the same position of the palm surface is subjected to line drop and distance measurement by the distance meter, and corresponding data are transmitted to a display screen to be compared with design data, so that the position mileage of the grilles is guaranteed to be accurate. When the side hole is drilled to 10-15m, the construction of the side hole is started, actual and designed data of each roof truss of the side hole is consistent with actual and designed data of the side hole, and the structures of the side guide hole are consistent with the structures in the side guide hole. The method simply, conveniently and accurately controls the data of the synchronous mileage, so that the effective connection of the middle pilot tunnel and the grid in the later period is achieved, the grid nodes of the side pilot tunnel and the middle pilot tunnel are positioned on the same vertical face, the stability of the primary supporting structure is effectively guaranteed, the construction safety in the excavation process is guaranteed, the waste of materials is reduced, the construction cost is reduced, the construction progress is accelerated, and the method is suitable for urban rail transit construction.
2. The method effectively controls the excavation footage and the position in the process of primary support excavation, thereby achieving synchronous excavation with the mileage of the left pilot tunnel and the right pilot tunnel, storing and uploading data measured in real time by a distance meter to a control system, and displaying the design value and comparing the actual measured value by a display screen to adjust the position of the grating, thereby achieving the aim of synchronous control.
3. The method is simple in construction, effectively reduces the problem of the deviation of the connecting nodes of the medium pilot tunnel grating, and reduces the potential safety hazard of the whole structure, so that the whole settlement is reduced, and the operation safety of the existing station is ensured; the method has the advantages of simple equipment, high repeated utilization rate, accurate data transmission and background control, strong applicability, effectively reduced construction cost, potential safety hazard and improved construction progress, and has wide popularization and application values.
Drawings
FIG. 1 is a flow chart of the construction method of the present invention;
FIG. 2 is a schematic cross-sectional view of an initial position of the construction method of the present invention;
FIG. 3 is a schematic view of a construction excavation face of the construction method of the present invention;
FIG. 4 is a schematic cross-sectional view of a flat-top straight-wall double-side-wall pit-guiding construction structure according to the construction method of the present invention;
FIG. 5 is a schematic cross-sectional view of an elliptical double-side-wall pit-guiding construction structure according to the construction method of the present invention.
In the figure, 1 is a supporting structure, 2 is a distance measuring instrument, 3 is a display screen, and 4 shields the control panel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a side-hole synchronous mileage construction method of a large-section tunnel by a double-side-wall pit guiding method, which comprises the following steps as shown in figures 1 to 3:
the method comprises the following steps that firstly, the upper section of a tunnel is divided into a first left pilot tunnel, a second middle pilot tunnel and a third right pilot tunnel for construction;
step two, excavating first-number left pilot tunnel
Dismantling the horsehead range of a first-number left pilot tunnel according to a design drawing, installing three simultaneous grids, recording the mileage and the coordinates of each grid, and reserving embedded parts at the upper row of bolt hole positions on the outer side of a third side wall connecting plate and the lower row of bolt hole positions of a vault connecting plate;
step three, measuring mileage and coordinate positions of each roof truss from the third roof truss, recording data, excavating an upper step to 5m, installing a distance meter 2 at the position of the embedded part when the lower step begins to excavate, wherein the distance between the position of the distance meter 2 and main ribs arranged in the grating is 500mm, and well performing mechanical safety protection;
fourthly, when the step on the first left pilot tunnel advances to 5m, starting to position and install the display screen 3 on the side wall, correcting data link, and performing link in background data transmission; the previous measured data is also transmitted to the system;
the installed tunnel face grating is provided with shielding control plates 4 which correspond to the range finders 2 one by one according to the customized distance, and positioning check data and display screen design data are compared and corrected;
ensuring that the actual construction data of the first left pilot tunnel is consistent with the design data;
step five, constructing No. three right pilot tunnel
When the No. one left pilot tunnel enters the ruler by 10-15m, starting excavation of the No. three right pilot tunnel;
dismantling the horse head door range of the No. three right pilot tunnel according to the position of a design drawing, installing three simultaneous grids, corresponding to the recorded mileage and coordinates of the No. one left pilot tunnel grid, rechecking by using a total station, and reserving embedded parts at the upper row bolt hole positions on the outer side of the third side wall connecting plate and the lower row bolt hole positions of the vault connecting plate;
seventhly, when the upper step of the No. three right pilot tunnel is excavated to 5m and the lower step starts to be excavated, installing a distance meter 2 at the position of the embedded part, wherein the distance between the position of the distance meter 2 and the main ribs in the inner row of the grating is 500mm, and well performing mechanical safety protection;
eighthly, when the footage of the upper step of the No. three right pilot tunnel reaches 5m, positioning and installing a display screen (3) on the side wall, correcting data link, and transmitting background data;
the actual construction data in the No. three right pilot tunnel and the actual construction data in the left pilot tunnel are kept consistent; if not, adjusting the position of the grid in the No. three right pilot hole until the grid is consistent. Through the steps, grid nodes of the side pilot tunnels III and the middle pilot tunnels III are effectively ensured to be positioned on the same vertical face, so that the firmness and stability of the primary supporting structure are ensured, and the construction safety in the excavation process is ensured.
And step nine, synchronously updating and comparing the data of the No. one left pilot tunnel and the data of the No. three right pilot tunnels to be cut into the tunnel face. Controlling the footage and construction of excavation; and then, the effective correspondence of the mileage of the two excavated side holes is ensured, and the smooth construction of the No. two middle pilot tunnel grids is ensured.
Step ten, excavating a No. two middle pilot tunnel after the left pilot tunnel and the right pilot tunnel meet the space required by design and specification;
eleven steps of excavating No. 2 pilot tunnel
And step twelve, repeating the step two to the step eleven until the whole tunnel is excavated.
In this example, the distance measuring instruments 2 are two in number and are respectively installed on the side walls and the vault of the first left pilot tunnel and the third right pilot tunnel.
The data displayed by the display screen 3 includes: the method comprises the following steps of excavating the guide hole name and position, initial grid control point coordinates and mileage, grid design distance and number corresponding data, data of grids of a left guide hole and a right guide hole, data of grids of a right guide hole and the like. Constructors can quickly know the construction process of another cavern by observing the display screen 3, so that the construction progress is accurately controlled, and the synchronization of construction data in the left and right pilot tunnels is ensured.
The distance measuring instrument 2 and the display screen 3 adopt a Bluetooth transmission mode and transmit the distance measuring instrument and the display screen to a control system.
The distance measuring principle of the distance measuring instrument 2 matched with the shielding control plate 4 is as follows:
laser of the range finder 2 is emitted to the position of the shielding control plate 4 and then reflected to the initial position, and a receiver in the range finder 2 receives the laser and then measures the round trip time t of the laser, and uploads the measured data to the control system;
the distance d is ct, wherein c is the speed of light propagating in the atmosphere, and t is the laser round-trip time;
the measurement data are visually reflected by installing the display screen 3, and a constructor can quickly know the construction progress of another cavern by observing the display screen 3, so that the construction progress is accurately controlled.
The method effectively reduces the problem of the deviation of the connecting nodes of the medium-guide-hole grating, and reduces the potential safety hazard of the whole structure, thereby reducing the whole settlement and ensuring the operation safety of the existing station; the construction method has the advantages of simple steps, convenience in mounting and dismounting of equipment, high repeated utilization rate, accurate data transmission and background control, simple data comparison and strong applicability, reduces construction cost and potential safety hazards in construction, effectively improves construction progress, and is suitable for various construction occasions.
The method can be used in the flat-top straight-wall type double-side-wall pit guiding method of the existing subway station (figure 4) or the oval double-side-wall pit guiding method of the interval (figure 5).
For example, in the elliptical double-sidewall pit guiding method (fig. 5), all the two connection points of the arc-shaped segment are used for controlling, the two distance measuring instruments 2 are adjusted to be the two connection points of the arc-shaped segment for controlling, the two shielding control plates 4 can control the reflection distance and position of light by matching the light reflecting paste with the vertical line, and then the position of the grid to be erected is adjusted. The relevant data on the display screen 3 can be adjusted to other data that are actually needed. All device data links may communicate using bluetooth, wireless networks, or internet cables, etc.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A large-section tunnel double-side-wall pit guiding method side hole synchronous mileage construction method is characterized by comprising the following steps:
dividing the upper section of the tunnel into a left pilot tunnel, a middle pilot tunnel and a right pilot tunnel for construction;
step two, excavating a left pilot tunnel;
thirdly, mounting a primary support (1) in the left pilot tunnel;
fourthly, mounting a distance meter (2) and a display screen (3) on the primary support (1);
fifthly, ensuring that the actual construction data of the left pilot tunnel is consistent with the design data;
sixthly, excavating a right pilot tunnel
Excavating a right pilot tunnel after the left pilot tunnel enters a certain distance;
step seven, installing a primary support (1) in the right pilot tunnel;
step eight, mounting a distance meter (2) and a display screen (3) on the primary support (1) of the right pilot tunnel;
step nine, the actual construction data in the right pilot tunnel and the actual construction data in the left pilot tunnel are kept consistent; if not, adjusting the position of the grid in the right pilot tunnel until the grid is consistent;
step ten, excavating middle pilot tunnels after the left pilot tunnels and the right pilot tunnels meet the space required by design and specification;
and step eleven, repeating the step two to the step eleven until the whole tunnel excavation is finished.
2. The method for constructing the synchronous mileage of the side hole of the large-section tunnel according to claim 1, wherein in the third step, the primary support is a steel grating, three simultaneous gratings are installed in the left pilot hole, the mileage and the coordinates of each grating are recorded, and embedded parts are reserved at the positions of upper rows of bolt holes on the outer side of the side wall connecting plate and the positions of lower rows of bolt holes on the arch crown connecting plate.
3. The method for constructing the synchronous mileage of the side hole of the large-section tunnel by the double-side-wall pit guiding method according to claim 2, wherein mileage and coordinate positions need to be measured from the third roof, data are recorded, the upper step is excavated to 3-5m, when the lower step is excavated, a distance meter (2) is installed at the position of the embedded part, the distance between the position of the distance meter (2) and main ribs arranged in the grating is 500mm, and mechanical safety protection is well performed.
4. The large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method according to claim 1, characterized in that in the fourth step, when the step size on the left pilot hole reaches 3-5m, a display screen (3) is installed on the side wall, data link is well corrected, and background data transmission is well linked; the previously measured data is simultaneously transmitted to the control system.
5. The method for constructing the synchronous mileage of the side hole of the large-section tunnel by the double-side-wall pit guiding method according to claim 1, wherein in the fourth step, shielding control plates (4) which are in one-to-one correspondence with the distance measuring instruments (2) are installed on a tunnel face grating under construction according to a preset distance, and positioning check data and display screen (3) design data are compared and corrected.
6. The method for constructing the side-hole synchronous mileage of the large-section tunnel according to claim 1, wherein in the fifth step, excavation of the right pilot hole is started when the left pilot hole is advanced by 10-15 m.
7. The large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method according to claim 5, characterized in that the distance meter (2), the display screen (3) and the shielding control panel (4) in the right pilot hole are installed the same as the left pilot hole.
8. The method for synchronously constructing the side-hole and mileage of the large-section tunnel according to claim 1, wherein the actual construction data of the left pilot hole and the data of the face of the right pilot hole to be excavated are synchronously updated and compared, so as to control the excavation and construction mileage of the excavation, thereby ensuring that the mileage of the excavated left and right pilot holes effectively corresponds and ensuring that the grid of the middle pilot hole is smoothly constructed.
9. The large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method according to claim 1, characterized in that the number of the distance measuring instruments (2) in the left pilot hole and the right pilot hole is two, and the distance measuring instruments are respectively installed at the side wall and the arch top in the hole.
10. The large-section tunnel double-side-wall pit guiding method side-hole synchronous mileage construction method according to claim 1, wherein the data displayed by the display screen (3) comprises: the method comprises the following steps of excavating the top of the left pilot tunnel, excavating the right pilot tunnel, and carrying out grating excavation on the left pilot tunnel and the right pilot tunnel.
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| JPH09328999A (en) * | 1996-06-11 | 1997-12-22 | Hazama Gumi Ltd | Method for excavating large scale underground cavity |
| JP2008308835A (en) * | 2007-06-12 | 2008-12-25 | Ohbayashi Corp | Construction method for sidewall pilot tunnel type tunnel and its structure |
| CN113338952A (en) * | 2021-07-16 | 2021-09-03 | 中铁二十局集团有限公司 | Construction method for large-section tunnel with turnout line led out from railway tunnel |
| CN114215529A (en) * | 2021-11-17 | 2022-03-22 | 江苏雷威建设工程有限公司 | Multi-span large-section box culvert inter-junction jacking construction monitoring system |
| CN114483047A (en) * | 2022-01-07 | 2022-05-13 | 中铁二十二局集团轨道工程有限公司 | Method for underground excavation of double-side-wall guide pits of large-section subway tunnel |
| CN115163084A (en) * | 2022-07-22 | 2022-10-11 | 中交（广州）建设有限公司 | Mechanical construction method for ultra-large section tunnel by double-side-wall pit guiding method |
-
2022
- 2022-06-02 CN CN202210626483.0A patent/CN114961743A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09328999A (en) * | 1996-06-11 | 1997-12-22 | Hazama Gumi Ltd | Method for excavating large scale underground cavity |
| JP2008308835A (en) * | 2007-06-12 | 2008-12-25 | Ohbayashi Corp | Construction method for sidewall pilot tunnel type tunnel and its structure |
| CN113338952A (en) * | 2021-07-16 | 2021-09-03 | 中铁二十局集团有限公司 | Construction method for large-section tunnel with turnout line led out from railway tunnel |
| CN114215529A (en) * | 2021-11-17 | 2022-03-22 | 江苏雷威建设工程有限公司 | Multi-span large-section box culvert inter-junction jacking construction monitoring system |
| CN114483047A (en) * | 2022-01-07 | 2022-05-13 | 中铁二十二局集团轨道工程有限公司 | Method for underground excavation of double-side-wall guide pits of large-section subway tunnel |
| CN115163084A (en) * | 2022-07-22 | 2022-10-11 | 中交（广州）建设有限公司 | Mechanical construction method for ultra-large section tunnel by double-side-wall pit guiding method |
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