CN117005878A - Construction method for large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line - Google Patents
Construction method for large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line Download PDFInfo
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- CN117005878A CN117005878A CN202311068001.5A CN202311068001A CN117005878A CN 117005878 A CN117005878 A CN 117005878A CN 202311068001 A CN202311068001 A CN 202311068001A CN 117005878 A CN117005878 A CN 117005878A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 142
- 230000005641 tunneling Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000004062 sedimentation Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 238000012937 correction Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 10
- 239000013589 supplement Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a construction method for a large longitudinal slope small radius TBM to span an ultra-short distance existing operation track line, which comprises the following steps: arranging a plurality of monitoring points above an existing track tunnel to acquire monitoring data; establishing an independent coordinate system of a monitoring section, and setting a warning value of a monitoring item; installing monitoring equipment in the tunnel; finishing technical preparation and equipment inspection before the TBM passes through the existing operation track, and then continuing tunneling; adjusting tunneling parameters; in the tunneling process, 4 holes are adopted for grouting simultaneously, a pressure detector is arranged, and grouting pressure and grouting quantity are detected and controlled; and evaluating the influence of construction operation activities in the protection area on the facilities of the existing structural equipment by monitoring data acquired by the monitoring equipment and the independent coordinate system of the monitoring section, and forecasting the potential safety hazard. Monitoring data can be accurately obtained in real time, and measurement work is reduced; the influence of TBM construction on the existing operation line is reduced, the sedimentation of surrounding buildings is reduced, and the safety is ensured.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a construction method for a large longitudinal slope small radius TBM over-span super-close existing operation track line.
Background
In TBM tunnel construction, construction is often carried out by crossing the existing operation track line, and the existing traffic structure equipment is influenced in the crossing construction operation process, so that a safe and reliable construction method is required to evaluate the influence of construction operation activities in a protection area on the track traffic structure facility equipment, and accurately and timely forecast the hidden danger possibly endangering the track traffic operation safety, so that effective measures can be taken in time to eliminate the hidden danger, and the occurrence of accidents is avoided.
Disclosure of Invention
In view of the above, the invention aims to provide a construction method for a large longitudinal slope small radius TBM over-span ultra-short distance existing operation track line, and the construction method is used for construction, so that monitoring data can be accurately obtained in real time, and measurement work is reduced; the influence of shield construction on the existing operation line is reduced, the settlement of surrounding buildings is reduced, and the safety is ensured.
The invention solves the technical problems by the following technical means: the invention provides a construction method for a large longitudinal slope small radius TBM to span an ultra-short distance existing operation track line, which comprises the following steps:
arranging a plurality of monitoring points above an existing track tunnel, and acquiring monitoring data through the arranged monitoring points;
establishing a monitoring section independent coordinate system based on the laid monitoring points, and setting monitoring item warning values according to the monitoring items;
installing monitoring equipment in the tunnel;
finishing technical preparation and equipment inspection before the TBM surpasses the existing operation track, and then continuing tunneling;
adjusting tunneling parameters according to the acquired monitoring data and the stratum condition of the face;
in the tunneling process, 4 holes are adopted for simultaneous grouting, a pressure detector is arranged at the outlet of each grouting hole, and grouting pressure and grouting amount of each grouting hole are detected and controlled;
in the tunneling process and grouting process, the influence of construction operation activities in the protection area on the facilities of the existing structural equipment is assessed through monitoring data obtained by the monitoring equipment and the independent coordinate system of the monitoring section, and potential safety hazards are predicted.
Further, arranging monitoring points above the existing track tunnel comprises arranging automatic monitoring points, crack monitoring points and manual monitoring points.
Further, the automatic monitoring point layout method comprises the following steps:
arranging horizontal displacement and vertical displacement monitoring points of a ballast bed on the ballast bed through a drilling embedded small prism;
the horizontal displacement monitoring points and the vertical displacement monitoring points of the tunnel structure are completed at the two sides of the tunnel structure, the vault and the middle part of the bottom plate through the small embedded prisms;
and arranging two horizontal and vertical survey lines through the drilling buried small prism to finish the tunnel structure clearance convergence monitoring point.
Further, the artificial monitoring point comprises the following steps:
taking the automatic monitoring point as a manual checking monitoring point;
additionally drilling holes on the outer side walls of the ballast bed and the tunnel to embed sedimentation nails as supplement for manual checking of vertical displacement of the ballast bed and the tunnel structure;
and (3) sticking reflecting sheets on two sides of the tunnel to supplement the manual check of the tunnel structure clearance convergence.
Further, the crack monitoring point includes:
monitoring points are arranged on structural cracks with the width of more than 0.2mm for monitoring;
and uniformly numbering the cracks to be observed.
Further, the method comprises the steps of establishing an independent coordinate system of the monitoring section based on the laid monitoring points, forming a datum point group through the established plurality of monitoring points, converging the datum point group into a datum point, and converging working datum points through the set common section datum transfer points to form the independent coordinate system of the monitoring section.
Further, the tunneling parameters are adjusted according to the acquired monitoring data and the stratum condition of the face, and the method further comprises the steps that an alarm value and a limit value are set when the tunneling direction is adjusted, a correction program is executed when the alarm value is reached, correction is slowly carried out when correction is carried out, and the correction amount is controlled within 6 mm/ring.
According to the technical scheme, the beneficial effects of the invention are as follows: the invention provides a construction method for a large longitudinal slope small radius TBM to span an ultra-short distance existing operation track line, which comprises the following steps: arranging a plurality of monitoring points above an existing track tunnel, and acquiring monitoring data through the arranged monitoring points; establishing a monitoring section independent coordinate system based on the laid monitoring points, and setting monitoring item warning values according to the monitoring items; installing monitoring equipment in the tunnel; finishing technical preparation and equipment inspection before the TBM surpasses the existing operation track, and then continuing tunneling; adjusting tunneling parameters according to the acquired monitoring data and the stratum condition of the face; in the tunneling process, 4 holes are adopted for simultaneous grouting, a pressure detector is arranged at the outlet of each grouting hole, and grouting pressure and grouting amount of each grouting hole are detected and controlled; in the tunneling process and grouting process, the influence of construction operation activities in the protection area on the facilities of the existing structural equipment is assessed through monitoring data obtained by the monitoring equipment and the independent coordinate system of the monitoring section, and potential safety hazards are predicted. Monitoring data can be accurately obtained in real time, and measurement work is reduced; the influence of shield construction on the existing operation line is reduced, the settlement of surrounding buildings is reduced, and the safety is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic view of a horizontal displacement, vertical displacement, headroom convergence monitoring profile;
FIG. 2 is a schematic diagram of an automated measurement system architecture;
FIG. 3 is a schematic diagram of a data processing model.
Description of the embodiments
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a construction method for a large longitudinal slope small radius TBM up-span super-short distance existing operation track line, comprising the following steps:
arranging a plurality of monitoring points above an existing track tunnel, and acquiring monitoring data through the arranged monitoring points; including laying automation monitoring point, crack monitoring point and manual work monitoring point.
The method monitors the items such as horizontal displacement, vertical displacement, cracks and the like of the track structure and facility equipment, provides timely and reliable information for owners to evaluate the influence of construction operation activities in a protection area on the track traffic structure facility equipment, and accurately and timely forecasts the hidden danger possibly endangering the track traffic operation safety so as to take effective measures in time to eliminate the hidden danger and avoid accidents. The construction operation activities have a large influence on the track traffic facilities, and when the condition that the operation safety of the track traffic is possibly influenced is generated, the monitoring data is an important reference basis for adjusting the existing track traffic protection scheme.
Wherein, automatic monitoring point includes:
1) The track bed horizontal displacement and vertical displacement monitoring points are buried on the track bed through the drilling holes by the small prisms.
2) The horizontal displacement monitoring points and the vertical displacement monitoring points of the tunnel structure are buried in the two sides of the tunnel structure, the vault and the middle part of the bottom plate through drilling holes, wherein the monitoring points in the middle part of the bottom plate are co-located with the horizontal displacement and the vertical displacement of the ballast bed.
3) The tunnel structure clearance convergence monitoring points are formed by arranging two horizontal and vertical measuring lines through drilling and burying small prisms. Wherein, the monitoring points at the two ends of the horizontal measuring line are co-located with the horizontal and vertical displacement monitoring points at the two sides of the tunnel structure; and monitoring points at two ends of the vertical measuring line are co-located with horizontal displacement and vertical displacement monitoring points in the middle of the vault and the bottom plate of the tunnel structure.
The artificial monitoring points comprise:
1) All automatic monitoring points are used as manual checking monitoring points;
2) Additionally drilling holes on the outer side walls of the ballast bed and the tunnel to embed sedimentation nails, and taking the sedimentation nails as a supplementary means for manually checking the vertical displacement of the ballast bed and the vertical displacement of the tunnel structure;
3) And (3) sticking reflecting sheets on two sides of the tunnel structure to be used as a supplementary means for manual checking of the clearance convergence of the tunnel structure.
Crack monitoring points include:
1) And (3) arranging monitoring points for structural cracks with the width of more than 0.2mm for monitoring. In the implementation process of external operation, the newly increased cracks of the structure should be also arranged with monitoring points for monitoring.
2) The cracks to be observed should be numbered uniformly. At least two groups of observation marks are arranged on each crack, one group is at the widest part of the crack, and the other group is at the tail end of the crack. Each group should use two corresponding marks, respectively arranged at two sides of the crack.
Establishing a monitoring section independent coordinate system based on the laid monitoring points, and setting monitoring item warning values according to the monitoring items;
the specific table is as follows:
| sequence number | Monitoring items | Control value | Controlling rate |
| 1 | Vertical displacement of tunnel structure | ≤10mm | ≤1mm/d |
| 2 | Horizontal displacement of tunnel structure | ≤10mm | ≤1mm/d |
| 3 | Tunnel structure headroom convergence | ≤10mm | ≤1mm/d |
| 4 | Vertical displacement of ballast bed | ≤10mm | ≤1.5mm/d |
| 5 | Horizontal displacement of ballast bed | ≤10mm | ≤1.5mm/d |
| 6 | Crack and crack | ≤0.2mm | - |
| Monitoring and early warning level | Monitoring ratio G | Countermeasure management measure |
| Normal state | G<0.6 | Monitoring according to a monitoring scheme |
| Yellow colour | 0.6≤G<0.8 | Monitoring and alarming, and adopting measures such as encrypting monitoring points or improving monitoring frequency to strengthen monitoring of urban rail transit structure |
| Orange color | 0.8≤G<1.0 | Monitoring and alarming, enhancing the monitoring and inspection frequency of urban rail transit structures, and carrying out targeted monitoring work according to safety protection measures formulated by all parties |
| Red color | 1.0≤G | And the safety emergency plan is started, so that the urban rail transit structure is monitored in real time. |
Installing monitoring equipment in the tunnel;
specifically, an Leica TM60 total station is used for automatic monitoring. The intelligent total station has an automatic target recognition function and a precise servo motor driving system (direct drive and piezoelectric ceramic technology), the ATR angle of view of the intelligent total station can be adjusted, and a small-view field technology is provided. The total station automatic measurement adopts a multi-sensor automatic deformation monitoring system, and specifically to the total station, the whole system consists of a Leica intelligent total station, a data acquisition unit (an integrated intelligent terminal), a server and a webpage end. The system utilizes a GeoCOM interface provided by a full-automatic full-station of Leica to carry out secondary development and measurement, utilizes a cellular mobile network to realize remote communication connection, and utilizes a WebSocket technology to realize real-time two-way communication. The system architecture is shown in the following figure. Through the system, a user can complete the works of total station automation project management, remote control, real-time data acquisition, data inquiry and downloading, measuring point configuration and the like on a webpage. When the automatic monitoring of the measuring robot (total station) is in the monitoring project of the existing rail transit structure, the result of the automatic monitoring of the total station should be rechecked by combining with other automatic monitoring technologies or manual monitoring, and the comparison and the verification of two or more monitoring data projects are beneficial to the protection of the adjacent existing structure and the guarantee of the smooth progress of external construction.
Finishing technical preparation and equipment inspection before the TBM surpasses the existing operation track, and then continuing tunneling; adjusting tunneling parameters according to the acquired monitoring data and the stratum condition of the face;
specifically, the tunneling parameters should be adjusted in time according to the stratum condition of the face, the warning value and the limiting value should be set when the tunneling direction is adjusted, and the correction program should be implemented when the warning value is reached. Correction and deviation correction should be performed slowly, deviation correction is controlled to be excessive, and deviation correction amount is controlled within 6 mm/ring. Checking the condition of the equipment before crossing, making equipment maintenance in advance, and strengthening equipment inspection in the crossing process to ensure continuous crossing.
In the tunneling process, 4 holes are adopted for simultaneous grouting, a pressure detector is arranged at the outlet of each grouting hole, and grouting pressure and grouting amount of each grouting hole are detected and controlled;
specifically, 4-hole simultaneous grouting is adopted, and a pressure detector is arranged at the outlet of each grouting hole so as to detect and control grouting pressure and grouting quantity of each grouting hole, thereby realizing symmetrical and uniform grouting of back gaps of the duct piece, and controlling grouting pressure between 0.15MPa and 0.24 MPa. And (3) adopting a double index standard, namely, the grouting pressure reaches the design pressure or the grouting pressure does not reach the design pressure, but the grouting quantity reaches the design grouting quantity, and stopping grouting. And (3) carrying out perforation inspection, recording the condition of perforation inspection, judging whether grouting of the wall thickness of the duct piece is full, and carrying out secondary grouting, wherein the secondary grouting mainly controls grouting pressure.
In the tunneling process and grouting process, the influence of construction operation activities in the protection area on the facilities of the existing structural equipment is assessed through monitoring data obtained by the monitoring equipment and the independent coordinate system of the monitoring section, and potential safety hazards are predicted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (7)
1. The construction method for the large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line is characterized by comprising the following steps of:
arranging a plurality of monitoring points above an existing track tunnel, and acquiring monitoring data through the arranged monitoring points;
establishing a monitoring section independent coordinate system based on the laid monitoring points, and setting monitoring item warning values according to the monitoring items;
installing monitoring equipment in the tunnel;
finishing technical preparation and equipment inspection before the TBM passes through the existing operation track, and then continuing tunneling;
adjusting tunneling parameters according to the acquired monitoring data and the stratum condition of the face;
in the tunneling process, 4 holes are adopted for simultaneous grouting, a pressure detector is arranged at the outlet of each grouting hole, and grouting pressure and grouting amount of each grouting hole are detected and controlled;
in the tunneling process and grouting process, the influence of construction operation activities in the protection area on the facilities of the existing structural equipment is assessed through monitoring data obtained by the monitoring equipment and the independent coordinate system of the monitoring section, and potential safety hazards are predicted.
2. The construction method for the line construction of the large-longitudinal-slope small-radius TBM over-span ultra-short-distance existing operation track, which is characterized by comprising the following steps of: and arranging monitoring points above the existing track tunnel, including arranging automatic monitoring points, crack monitoring points and manual monitoring points.
3. The construction method for the line construction of the large-longitudinal-slope small-radius TBM over-span super-short-distance existing operation track, which is characterized by comprising the following steps of: the automatic monitoring point layout method comprises the following steps of:
arranging horizontal displacement and vertical displacement monitoring points of a ballast bed on the ballast bed through a drilling embedded small prism;
the horizontal displacement monitoring points and the vertical displacement monitoring points of the tunnel structure are completed at the two sides of the tunnel structure, the vault and the middle part of the bottom plate through the small embedded prisms;
and arranging two horizontal and vertical survey lines through the drilling buried small prism to finish the tunnel structure clearance convergence monitoring point.
4. The construction method for the line of the large-longitudinal-slope small-radius TBM over-span super-short-distance existing operation track, which is characterized by comprising the following steps of: the artificial monitoring point comprises the following steps:
taking the automatic monitoring point as a manual checking monitoring point;
additionally drilling holes on the outer side walls of the ballast bed and the tunnel to embed sedimentation nails as supplement for manual checking of vertical displacement of the ballast bed and the tunnel structure;
and (3) sticking reflecting sheets on two sides of the tunnel to supplement the manual check of the tunnel structure clearance convergence.
5. The construction method for the line of the large-longitudinal-slope small-radius TBM over-span super-short-distance existing operation track, which is characterized by comprising the following steps of: the crack monitoring point includes:
monitoring points are arranged on structural cracks with the width of more than 0.2mm for monitoring;
and uniformly numbering the cracks to be observed.
6. The construction method for the line of the large-longitudinal-slope small-radius TBM over-span super-short-distance existing operation track, which is characterized by comprising the following steps of: the method comprises the steps of establishing a monitoring section independent coordinate system based on laid monitoring points, forming a datum point group through the established plurality of monitoring points, converging the datum point group into a datum point, and converging working datum points through setting a common section datum transfer point to form the monitoring section independent coordinate system.
7. The construction method for the line of the large-longitudinal-slope small-radius TBM over-span super-short-distance existing operation track, which is characterized by comprising the following steps of: the tunneling parameters are adjusted according to the acquired monitoring data and the stratum condition of the face, and the tunneling method further comprises the steps that an alarm value and a limit value are set when the tunneling direction is adjusted, a correction program is implemented when the alarm value is reached, correction is slowly carried out when correction is carried out, and the correction amount is controlled within 6 mm/ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311068001.5A CN117005878A (en) | 2023-08-23 | 2023-08-23 | Construction method for large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311068001.5A CN117005878A (en) | 2023-08-23 | 2023-08-23 | Construction method for large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line |
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| Publication Number | Publication Date |
|---|---|
| CN117005878A true CN117005878A (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311068001.5A Pending CN117005878A (en) | 2023-08-23 | 2023-08-23 | Construction method for large longitudinal slope small radius TBM up-span ultra-short distance existing operation track line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117005878A (en) |
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2023
- 2023-08-23 CN CN202311068001.5A patent/CN117005878A/en active Pending
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