CN113431587B - Construction method of shield tunnel connecting channel - Google Patents
Construction method of shield tunnel connecting channel Download PDFInfo
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- CN113431587B CN113431587B CN202110831310.8A CN202110831310A CN113431587B CN 113431587 B CN113431587 B CN 113431587B CN 202110831310 A CN202110831310 A CN 202110831310A CN 113431587 B CN113431587 B CN 113431587B
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- 239000002893 slag Substances 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
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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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
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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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
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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
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application discloses a construction method of a shield tunnel connecting channel, which comprises the steps of selecting an opening position of the connecting channel on a side wall of a first shield tunnel which is penetrated, arranging concrete patches at the corresponding opening positions of the first shield tunnel and a second shield tunnel, and carrying out anchor cable opposite pulling on the concrete patches after the strength of the concrete patches reaches a preset strength so as to fix the concrete patches and segments of the shield tunnel; then, drilling operation is carried out at the opening position so as to penetrate through the first shield tunnel and the second shield tunnel, and after penetrating, concrete patches are broken and slag is removed to form an initial channel; finally, reinforcing the initial channel and installing a fireproof door in the initial channel to form a communication channel; the strength of the first shield tunnel and the strength of the second shield tunnel are guaranteed by utilizing the concrete patch and the anchor cable to oppositely pull, construction safety problems such as collapse or sedimentation in the drilling process are avoided, and the connecting channel is reinforced, so that the strength and the safety of the connecting channel are guaranteed.
Description
Technical Field
The application relates to the technical field of shield tunnel construction, in particular to a construction method of a shield tunnel connecting channel.
Background
Due to the limitation of the closed space of the subway, a certain potential safety hazard is brought to the operation of the subway, and once the subway is in fire, the result is very serious. The direction of the heat waves, toxic gases and the like is consistent with the direction of people flow escape from bottom to top, and the device is particularly unfavorable for people evacuation, escape and the like in subways.
In order to solve the problem, a communication channel is arranged between two single-line-section tunnels, so that the hazard value of fire to subways is reduced. At present, shield construction is a main construction method for subway section tunnel construction, but the communication channel is small in engineering quantity and is generally positioned under a current road or an underground pipeline, the communication channel can not carry out precipitation operation in most cases, only auxiliary construction measures such as grouting and freezing can be adopted, the construction safety risk is high, and safety accidents and environmental accidents are easy to occur.
Disclosure of Invention
The present application has been made in order to solve the above technical problems. The embodiment of the application provides a construction method of a shield tunnel connecting channel, which solves the problem of high construction risk.
The application provides a construction method of a shield tunnel connection channel, which comprises the following steps: selecting an opening position of a connecting channel on the side wall of a first shield tunnel which is penetrated according to the opening diameter of the connecting channel; a first concrete patch and a second concrete patch are respectively arranged in a preset radius range at the opening position of the first shield tunnel and the position of the second shield tunnel corresponding to the opening position; the first shield tunnel and the second shield tunnel are through shield tunnels, and the communication channel is communicated with the first shield tunnel and the second shield tunnel; after the strength of the first concrete patch and the second concrete patch reach preset strength, carrying out anchor cable opposite pulling on the first concrete patch and the second concrete patch so as to fix the segments of the first concrete patch and the first shield tunnel and the segments of the second concrete patch and the second shield tunnel; drilling operation is carried out at the opening position so as to penetrate through the first shield tunnel and the second shield tunnel; breaking the first concrete patch and the second concrete patch and removing slag soil to form an initial channel; and reinforcing the initial channel and installing a fireproof door in the initial channel to form the communication channel.
In one embodiment, the drilling operation at the open position includes: installing a backing system and drilling equipment in the first shield tunnel; installing an originating cannula at the open position; wherein one end of the originating cannula near the opening position comprises a cutter; the backup system and the drilling apparatus drive the originating casing to perform a drilling action; after the starting sleeve drills a preset distance, welding a second sleeve and the starting sleeve; the backing system and the drilling equipment drive the welding sleeve to execute drilling action; wherein the welded sleeve represents a sleeve formed by welding a plurality of sleeves; and after the welding sleeve drills the preset distance, welding the subsequent sleeve and the welding sleeve, and continuously welding the sleeve until the starting sleeve reaches the segment of the second shield tunnel.
In one embodiment, the reclining system includes a jack; wherein, when the welding sleeve drills the preset distance, welding the subsequent sleeve with the welding sleeve comprises: stopping drilling and shrinking the jack when the length of the welding sleeve left in the first shield tunnel is smaller than or equal to a preset value; and welding a subsequent sleeve with the welded sleeve.
In an embodiment, the backup system and the drilling apparatus driving the welding sleeve to perform a drilling action includes: determining a baseline of the communication channel and a base point of a current drilling action; and determining a drilling direction of the current drilling action based on the baseline and the base point.
In one embodiment, the breaking the first concrete patch and the second concrete patch and clearing the slag soil comprises: breaking the first concrete patch and the second concrete patch and performing a digging operation on soil within the casing.
In one embodiment, the reinforcing the initial channel includes: grouting operation is carried out in the sleeve, secondary lining is carried out, and a reinforcing ring beam is arranged.
In one embodiment, the sleeve includes a plurality of preformed holes therein; wherein, the grouting operation in the sleeve comprises the following steps: grouting the outer side of the sleeve through the reserved holes.
In an embodiment, before the drilling operation is performed at the opening position, the construction method of the shield tunnel connection channel further includes: and a first water stop frame and a second water stop frame are respectively arranged in the first shield tunnel and the second shield tunnel.
In an embodiment, after the forming of the initial tunnel, the construction method of the shield tunnel connection tunnel further includes: and performing node waterproof treatment on the sleeve.
In an embodiment, before the drilling operation is performed at the opening position, the construction method of the shield tunnel connection channel further includes: and reinforcing the first shield tunnel and the second shield tunnel.
According to the construction method of the shield tunnel connecting channel, the opening position of the connecting channel is selected on the side wall of the first shield tunnel which is penetrated, the concrete patch is arranged at the position of the corresponding opening of the first shield tunnel and the position of the corresponding opening of the second shield tunnel, and after the strength of the concrete patch reaches the preset strength, anchor cable opposite pulling is carried out on the concrete patch so as to fix the concrete patch and the segment of the shield tunnel; then, drilling operation is carried out at the opening position so as to penetrate through the first shield tunnel and the second shield tunnel, and after penetrating, concrete patches are broken and slag is removed to form an initial channel; finally, reinforcing the initial channel and installing a fireproof door in the initial channel to form a communication channel; the strength of the first shield tunnel and the strength of the second shield tunnel are guaranteed by utilizing the concrete patch and the anchor cable to be oppositely pulled, construction safety problems such as collapse or sedimentation in the drilling process are avoided, the concrete patch is broken after the drilling is completed, and the connecting channel is reinforced, so that the strength and the safety of the connecting channel are guaranteed.
Drawings
The foregoing and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.
Fig. 1 is a schematic flow chart of a construction method of a shield tunnel connection channel according to an exemplary embodiment of the present application.
Fig. 2 is a flow chart of a method of drilling operation according to an exemplary embodiment of the present application.
Fig. 3 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application.
Fig. 4 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application.
Fig. 5 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application.
Fig. 6 is a schematic structural diagram of a construction device for a shield tunnel connection channel according to an exemplary embodiment of the present application.
Fig. 7 is a schematic structural diagram of construction equipment of a shield tunnel connection channel according to another exemplary embodiment of the present application.
Fig. 8 is a block diagram of an electronic device according to an exemplary embodiment of the present application.
Detailed Description
Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application and not all of the embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.
Fig. 1 is a schematic flow chart of a construction method of a shield tunnel connection channel according to an exemplary embodiment of the present application. As shown in fig. 1, the construction method of the shield tunnel connection channel includes:
step 110: and selecting the opening position of the communication channel on the side wall of the penetrated first shield tunnel according to the opening diameter of the communication channel.
The scheme is mainly used for solving the problem of the line provided with four layers of underground water, and can be applied to the construction of other similar lines, wherein the four layers of underground water are respectively upper layer water stagnation, diving, interlayer diving and pressure bearing water. The first layer is upper layer water retention, which changes along with seasonal variation, without obvious change rule, the second layer groundwater is diving, annual dynamic and atmospheric precipitation are closely related, annual average amplitude is about 1-2 m, the third layer groundwater is interlayer diving, annual change range is about 3-4 m, the fourth layer groundwater is pressure-bearing water, annual change range is about 2-3 m.
The opening diameter of the communication passage is determined, and a suitable opening position is selected within the opening range of the communication passage according to the opening diameter, for example, the right line shield tunnel which is penetrated can be used as a working surface, and the left line shield tunnel which is penetrated can be used as a working surface. The inner diameter of the first shield tunnel and the second shield tunnel is 5.8m, the included angle of the opening position of the first shield tunnel and the second shield tunnel is 69 degrees, and the opening size can be borne better than that of the shield tunnel with the inner diameter of 5.4 m.
Step 120: and respectively setting a first concrete patch and a second concrete patch in a preset radius range at the opening position of the first shield tunnel and the corresponding opening position of the second shield tunnel.
The first shield tunnel and the second shield tunnel are through shield tunnels, and the communication channel is communicated with the first shield tunnel and the second shield tunnel. After the opening position is determined, concrete patch setting is carried out on the opening position in a certain range, so that broken pipe pieces cut by the drilling machine are prevented from being scattered due to the fact that the broken pipe pieces are not connected with the whole pipe pieces. The setting of concrete patch must be bigger than the drilling machine, and one end sets up to the plane, and the other end sets up to the cambered surface and is unanimous with main tunnel arc.
Step 130: and after the strength of the first concrete patch and the second concrete patch reaches the preset strength, carrying out anchor cable opposite pulling on the first concrete patch and the second concrete patch so as to fix the first concrete patch and the duct piece of the first shield tunnel and the second concrete patch and the duct piece of the second shield tunnel.
And after the strength of the first concrete patch and the second concrete patch reach the preset strength, carrying out anchor cable opposite pulling on the first concrete patch and the second concrete patch to fix the concrete patch and the duct piece so as to improve the strength of the first concrete patch and the second concrete patch.
Step 140: drilling operation is performed at the opening position so as to penetrate through the first shield tunnel and the second shield tunnel.
In the construction preparation stage, a series of construction preparation such as a starting platform of a construction drilling machine of a large-diameter sleeve drilling method of a connecting channel, a device for starting and receiving sealing of the drilling machine, assembly and debugging of the drilling machine, installation of a back device system, installation of a positive line tunnel segment reinforcing system, entering of a sleeve and the like are required to be completed, and then drilling operation is carried out at an opening position so as to penetrate through a first shield tunnel and a second shield tunnel.
Step 150: and breaking the first concrete patch and the second concrete patch and removing slag soil to form an initial channel.
After the drilling work is completed, the first concrete patch and the second concrete patch are broken, the redundant sleeve is cut to be consistent with the positive line radian of the tunnel, and the soil in the sleeve is excavated to form an initial channel.
In an embodiment, the implementation manner of the step 150 may be: breaking the first concrete patch and the second concrete patch and performing a digging operation on the soil within the casing.
Step 160: the initial channel is reinforced and fire doors are installed in the initial channel to form a communication channel.
The method comprises the steps of reinforcing the initial passage to improve the strength and safety of the communication passage, and installing a fireproof door in the communication passage to improve the fireproof safety. The fire door needs to have a function that satisfies the requirements of fire resistance stability, heat insulation and integrity in a predetermined period of time. Fireproof doors need to have fireproof dividers with certain fire resistance, the fireproof doors have the function of common doors and the function of preventing fire from spreading or smoke from spreading outwards, and the spread fire is prevented in a certain time, so that people can be evacuated in more time, personal and property safety is guaranteed, and the fireproof door in the application is 2100 multiplied by 900mm in size.
In one embodiment, the specific implementation of step 160 may be: grouting operation is carried out in the sleeve, secondary lining is carried out, and a reinforcing ring beam is arranged. The diameter of the cutter of the drilling machine is 20mm wider than the diameter of the casing, and a cavity can appear after the drilling is completed on the casing wall. In order to avoid the occurrence of voids and loose areas between the concrete and the sleeve, the required compactness is achieved so as to prevent sedimentation. Grouting is carried out before the concrete for secondary molding is applied, wherein the grouting pressure is controlled carefully, and the gaps are compacted and filled with the grouting as much as possible. After the drilling machine finishes the drilling work, after the sleeve penetrates through the whole connecting channel and enters the whole receiving device, grouting is fixed at the connecting part of the first shield tunnel, the second shield tunnel and the sleeve of the connecting channel, and the reserved air bags in the originating end, the receiving end and the receiving device are inflated, so that gaps which possibly exist can be blocked. And after confirming that all the reinforcement measures and the plugging measures are effective, separating the sleeve from the drilling machine and disassembling the drilling machine. And excavating and clearing soil in the casing, and performing backfill grouting. Cutting the rest part of the sleeve to ensure that the radian of the sleeve is suitable for the whole tunnel and meets the requirements of processing the detail waterproof nodes. The joints of the communication channel and the positive tunnel structure are subjected to waterproof treatment, soil in the sleeve is cleaned, and the like, so that the degree of no influence on subsequent construction is finally achieved. And simultaneously grouting is carried out on the wall of the sleeve through the sleeve preformed hole, and grouting pressure is controlled so that a cavity does not appear behind the wall. And removing the plug in the preformed hole of the sleeve, and installing grouting equipment on the inner wire pipe hoop to perform back grouting. In order to achieve the grouting effect required by grouting, the main parameters of the backfill grouting selected by the user mainly comprise grouting pressure and grouting speed, wherein the grouting pressure is 0.2-0.5 MPa, and the grouting speed is 5-15L/min. The grouting slurry is selected as micro-expansion cement slurry, and the ratio of the grouting slurry to the micro-expansion cement slurry is 1:1. Grouting is carried out by a grouting machine, the initial pressure is 0.3MPa, and the final pressure is 0.6MPa. After the grouting pipes are connected, a pressurized water test is used for checking whether a pipeline is smooth or not before grouting, and then a grouting pump is started for grouting. Specifically, the casing pipe comprises a plurality of preformed holes, and the preformed holes are used for grouting the outer side of the casing pipe.
The application provides a connecting channel construction method, adopts the core to bore, and the sleeve pipe follows, and the sleeve pipe is the structure promptly with the first sleeve pipe that drilling machine assembly has the cutter bore while advancing in connecting channel opening part promptly, forms the sleeve pipe and imbeds soil, and the intraductal state of filling up the dregs of packing into, after the sleeve pipe link up, clear away the intraductal dregs of sleeve pipe, the sleeve pipe is the primary support of connecting channel promptly. The method is not influenced by the ground environment and groundwater, soil reinforcement is not considered, and the overall risk is relatively small, so that the risk in the construction process is reduced.
According to the construction method of the closed shield tunnel connecting channel, the opening position of the connecting channel is selected on the side wall of the first shield tunnel which is penetrated, the concrete patch is arranged at the corresponding opening position of the first shield tunnel and the second shield tunnel, and after the strength of the concrete patch reaches the preset strength, the anchor cable is pulled to the concrete patch so as to fix the concrete patch and the segment of the shield tunnel; then, drilling operation is carried out at the opening position so as to penetrate through the first shield tunnel and the second shield tunnel, and after penetrating, concrete patches are broken and slag is removed to form an initial channel; finally, reinforcing the initial channel and installing a fireproof door in the initial channel to form a communication channel; the strength of the first shield tunnel and the strength of the second shield tunnel are guaranteed by utilizing the concrete patch and the anchor cable to be oppositely pulled, construction safety problems such as collapse or sedimentation in the drilling process are avoided, the concrete patch is broken after the drilling is completed, and the connecting channel is reinforced, so that the strength and the safety of the connecting channel are guaranteed.
Fig. 2 is a flow chart of a method of drilling operation according to an exemplary embodiment of the present application. As shown in fig. 2, the step 140 may include:
step 141: and installing a backing system and drilling equipment in the first shield tunnel.
A backing system and drilling equipment are installed in the first shield tunnel, and the coordinates of the vertical axis and the horizontal axis are adjusted to be consistent with the position of the construction machinery of the communication channel, so that the overlarge deviation of the position is avoided; and after the installation is finished, debugging the reclining system. And (3) carrying out combined installation and debugging of the drilling machine on the ground, and installing the drilling machine starting platform and the drilling machine at the construction operation surface. The installation needs to pay attention to the accuracy of the opening position of the communication channel and pay attention to the degree of fit with the reclining system. After the installation is finished, the whole system is required to be finely adjusted, checked and debugged.
Step 142: installing an originating cannula at the open position; wherein the end of the originating cannula adjacent the opening location comprises a cutter.
Cutters are typically provided on the originating casing to cut the soil during drilling of the originating casing to effect advancement of the originating casing and other casing to intersect the first and second shield tunnels. The length of the sleeve (comprising the starting sleeve) is 1.4m, the thickness is 22mm, the weight is 2.5t, and in the process of processing, manufacturing and transporting, in order to ensure that the sleeve is a perfect circle, cross I-shaped steel is added into the sleeve for temporary support. When the sleeve is conveyed to the construction work surface, the sleeve is welded with the previous sleeve and is installed on the drilling machine, and the I-steel can be removed. And it is necessary to carry out the epoxy asphalt paint 2 layer on the surface of the casing at least 24 hours in advance to avoid the casing from damaging rust corrosion in drilling.
Step 143: the reclining system and the drilling apparatus drive the originating casing to perform a drilling action.
The drilling equipment is driven by the backing system to drive the starting sleeve to rotate and advance, namely the drilling action of the starting sleeve is realized, and therefore, the cutter on the starting sleeve is used for cutting soil.
Step 144: and after the original casing is drilled for a preset distance, welding the second casing and the original casing.
And stopping drilling after the original sleeve drills a preset distance, for example, after the original sleeve drills to about 20mm (namely, the length left in the first shield tunnel is about 20 mm), contracting the jack, welding the second sleeve and the original sleeve, and continuously jacking the jack.
Step 145: the backing system and the drilling equipment drive the welding sleeve to execute drilling action; wherein, the welding sleeve represents a sleeve formed by welding a plurality of sleeves.
In the drilling process, a single sleeve is continuously welded to the drilled welding sleeve so as to increase the length of the welding sleeve, and the welding sleeve is driven by a backing system and drilling equipment to perform drilling action after welding, so that continuous drilling to a second shield tunnel is realized, and penetration of the first shield tunnel and the second shield tunnel is realized.
In an embodiment, the implementation manner of the step 145 may be: a baseline of the communication channel and a base point of the current drilling action are determined, and a drilling direction of the current drilling action is determined based on the baseline and the base point. Before the drilling machine starts to drill, a base line and a base point are selected, so that the accuracy degree of the guide bracket is ensured. Wherein, the base line is the central line of the connecting channel design, and the base point is the temporary level point. The base line and the base point are required to be firmly arranged, and the guide bracket cannot move in the whole construction process. In particular, if the direction is slightly shifted, a particularly large error may be caused. Control in the vertical direction: the single-side thrust of the jack is mainly used for controlling the direction of the drilling machine, the relation between the single-side thrust and the attitude variable quantity of the drilling machine is very discrete, when the drilling machine is in a downward depression state, the thrust of the jack at the lower side can be increased, and when the drilling machine is in a upward depression state, the thrust of the jack at the upper side can be increased. Control in the horizontal direction: the principle of correcting deviation in the vertical direction is the same, if the left deviation is caused, the propelling pressure of the left jack needs to be increased, and if the right deviation is caused, the propelling pressure of the right jack needs to be increased for adjustment, so that the drilling machine drills along the direction of the designed plane route.
Step 146: and after the welding sleeve drills a preset distance, welding the subsequent sleeve and the welding sleeve, and continuously welding the sleeve until the starting sleeve reaches the segment of the second shield tunnel.
In one embodiment, the reclining system includes a jack; the specific implementation manner of the step 146 may be: and stopping drilling and shrinking the jack when the length of the welding sleeve remaining in the first shield tunnel is smaller than or equal to a preset value, and welding the subsequent sleeve and the welding sleeve. And stopping drilling after the welding sleeve drills a preset distance, for example, after the welding sleeve drills to about 20mm (namely, the length left in the first shield tunnel is about 20 mm), contracting the jack, welding the subsequent sleeve and the welding sleeve, and continuously jacking the jack. And (3) normally drilling for a certain distance, cutting to a position close to the segment of the second shield tunnel by the drilling machine, slowing down the drilling and jacking speed, and after the support and support are finished around the segment connecting channel opening of the left-hand working face of the second shield tunnel, performing drilling and cutting on the segment of the second shield tunnel.
Cutting a concrete patch by adopting a specially designed drilling machine, then cutting the concrete patch to a tunnel segment, slightly slowing down the drilling speed after cutting and cutting the tunnel segment, jacking the drilling machine by a device system, starting the casing drilling machine, then cutting the soil part, stopping drilling after the casing drilling machine drills to the left 20mm, contracting a jack, welding the next casing, and continuously jacking the jack. Drilling to soil, and gradually adjusting the drilling speed from 4r/min to 1r/min.
Fig. 3 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application. As shown in fig. 3, before step 140, the construction method of the shield tunnel connection channel may further include:
step 170: and a first water stop frame and a second water stop frame are respectively arranged in the first shield tunnel and the second shield tunnel.
The water-stopping frame body is arranged outside the concrete patch and fixed by expansion bolts, and the water-stopping frame body is slightly larger than the diameter of the sleeve. The opening end of the water stop frame body is provided with a circle of Y-shaped rubber sealing strip device pointing to the outer side of the tunnel structure, and the sealing strip is fixed in the water stop tank body through a pressing strip. Wherein, there is the round inlet tube on the water stop box body, can open and shut at will, with the cooling when cutting the section of jurisdiction. The first pipe joint enters the water stop frame body and begins to cut the concrete patch and the pipe piece, and the drilling speed of the drilling machine is 4r/min. When cutting concrete patch and section of jurisdiction, cooling through the water pipe in the stagnant water framework. The water stop frame blocks the sediment gushed out when cutting the cut-through pipe piece, so that sediment loss is prevented, and the whole instability, upper sedimentation and the like are caused. Note the degree of adhesion between the concrete patch and the water-stop frame, and the degree of adhesion and fastening between the whole and the pipe pieces, the water-stop rubber on the water-stop frame needs to be checked to prevent excessive silt from overflowing.
Fig. 4 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application. As shown in fig. 4, after step 150, the construction method of the shield tunnel connection channel may further include:
step 180: and performing node waterproof treatment on the sleeve.
And carrying out waterproof treatment on joints of the communication channel, the first shield tunnel and the second shield tunnel structure, cleaning soil in the sleeve, and the like, and finally achieving the degree of not influencing subsequent construction. Checking whether the corner part connected between the duct piece and the sleeve is leaked or not, and tamping cotton wires and asbestos ashes to be compact, wherein each step is required to reach the standard. So as to achieve the effect of preventing water leakage.
Fig. 5 is a schematic flow chart of a construction method of a shield tunnel connection channel according to another exemplary embodiment of the present application. As shown in fig. 5, before step 140, the construction method of the shield tunnel connection channel may further include:
step 190: and reinforcing the first shield tunnel and the second shield tunnel.
After grouting is finished after the sleeve wall is finished, a certain standard is reached, then the reinforcing ring beam and the secondary lining are constructed, after the secondary lining is finished and has strength, the reinforcing measures of the positive line segment are removed, and the site is cleaned. After the construction of the communication channel is finished, the soil is cleaned up, and the sleeve is of a communication channel structure, which is equivalent to the primary support of the communication channel. Setting the thickness of the secondary lining to be 200mm, selecting C40 concrete, and carrying out reinforcement construction according to structural stress. Attention is paid to the coordination relationship between node waterproof construction and reinforced ring beam construction.
Fig. 6 is a schematic structural diagram of a construction device for a shield tunnel connection channel according to an exemplary embodiment of the present application. As shown in fig. 6, the construction equipment 60 of the shield tunnel connection passage includes: an opening position selecting module 61, configured to select an opening position of a communication channel on a sidewall of a first shield tunnel that has been penetrated according to an opening diameter of the communication channel; the concrete patch setting module 62 is configured to set a first concrete patch and a second concrete patch within a preset radius range at an opening position of the first shield tunnel and a corresponding opening position of the second shield tunnel, respectively; the anchor cable opposite-pulling module 63 is configured to perform anchor cable opposite-pulling on the first concrete patch and the second concrete patch after the strength of the first concrete patch and the second concrete patch reach a preset strength, so as to fix the first concrete patch and a segment of the first shield tunnel, and fix the second concrete patch and a segment of the second shield tunnel; a drilling operation module 64 for performing a drilling operation at the open position to penetrate the first shield tunnel and the second shield tunnel; an initial channel forming module 65 for breaking the first concrete patch and the second concrete patch and removing the slag soil to form an initial channel; the communication channel forming module 66 is used for reinforcing the initial channel and installing fire doors in the initial channel to form a communication channel.
According to the construction equipment for the closed shield tunnel connecting channel, the opening position of the connecting channel is selected on the side wall of the first shield tunnel which is already penetrated through by the opening position selection module 61, the concrete patch setting module 62 sets concrete patches at the positions of the corresponding openings of the first shield tunnel and the second shield tunnel, and after the strength of the concrete patches reaches the preset strength, the anchor cable counter-pulling module 63 carries out anchor cable counter-pulling on the concrete patches so as to fix the concrete patches and segments of the shield tunnel; then, the drilling operation module 64 performs a drilling operation at the opening position to penetrate the first shield tunnel and the second shield tunnel, and the initial passage forming module 65 breaks the concrete patch and clears the slag after the penetration to form an initial passage; finally, the communication channel forming module 66 reinforces the initial channel and installs a fire door within the initial channel to form a communication channel; the strength of the first shield tunnel and the strength of the second shield tunnel are guaranteed by utilizing the concrete patch and the anchor cable to be oppositely pulled, construction safety problems such as collapse or sedimentation in the drilling process are avoided, the concrete patch is broken after the drilling is completed, and the connecting channel is reinforced, so that the strength and the safety of the connecting channel are guaranteed.
In one embodiment, the initial channel formation module 65 may be further configured to: breaking the first concrete patch and the second concrete patch and performing a digging operation on the soil within the casing.
In one embodiment, the contact channel formation module 66 may be further configured to: grouting operation is carried out in the sleeve, secondary lining is carried out, and a reinforcing ring beam is arranged.
In one embodiment, the drilling operation module 64 may be further configured to: installing a backing system and drilling equipment in a first shield tunnel; installing an originating cannula at the open position; wherein one end of the originating sleeve close to the opening position comprises a cutter; the backing system and the drilling equipment drive the starting sleeve to execute the drilling action; after the original casing is drilled for a preset distance, welding the second casing and the original casing; the backing system and the drilling equipment drive the welding sleeve to execute drilling action; wherein, the welding sleeve represents a sleeve formed by welding a plurality of sleeves; and after the welding sleeve drills a preset distance, welding the subsequent sleeve and the welding sleeve, and continuously welding the sleeve until the starting sleeve reaches the segment of the second shield tunnel.
Fig. 7 is a schematic structural diagram of construction equipment of a shield tunnel connection channel according to another exemplary embodiment of the present application. As shown in fig. 7, the construction equipment 60 for the shield tunnel connection channel may further include: and the water stop module 67 is used for respectively installing a first water stop frame and a second water stop frame in the first shield tunnel and the second shield tunnel.
In an embodiment, as shown in fig. 7, the construction equipment 60 for the shield tunnel connection channel may further include: and a waterproof module 68 for performing node waterproof treatment on the sleeve.
In an embodiment, as shown in fig. 7, the construction equipment 60 for the shield tunnel connection channel may further include: and the tunnel reinforcing module 69 is used for reinforcing the first shield tunnel and the second shield tunnel.
Next, an electronic device according to an embodiment of the present application is described with reference to fig. 8. The electronic device may be either or both of the first device and the second device, or a stand-alone device independent thereof, which may communicate with the first device and the second device to receive the acquired input signals therefrom.
Fig. 8 illustrates a block diagram of an electronic device according to an embodiment of the present application.
As shown in fig. 8, the electronic device 10 includes one or more processors 11 and a memory 12.
The processor 11 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.
Memory 12 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that may be executed by the processor 11 to implement the method of construction of a shield tunnel connection channel and/or other desired functions of the various embodiments of the present application described above. Various contents such as an input signal, a signal component, a noise component, and the like may also be stored in the computer-readable storage medium.
In one example, the electronic device 10 may further include: an input device 13 and an output device 14, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
When the electronic device is a stand-alone device, the input means 13 may be a communication network connector for receiving the acquired input signals from the first device and the second device.
In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.
The output device 14 may output various information to the outside, including the determined distance information, direction information, and the like. The output device 14 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device 10 that are relevant to the present application are shown in fig. 8 for simplicity, components such as buses, input/output interfaces, etc. are omitted. In addition, the electronic device 10 may include any other suitable components depending on the particular application.
In addition to the methods and apparatus described above, embodiments of the present application may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the construction method of a shield tunnel connection channel according to the various embodiments of the present application described in the "exemplary methods" section of the present specification.
The computer program product may write program code for performing the operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer-readable storage medium, having stored thereon computer program instructions, which when executed by a processor, cause the processor to perform the steps in the construction method of a shield tunnel connection channel according to various embodiments of the present application described in the above-mentioned "exemplary method" section of the present specification.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not intended to be limited to the details disclosed herein as such.
The block diagrams of the devices, apparatuses, devices, systems referred to in this application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent to the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (7)
1. The construction method of the shield tunnel connecting channel is characterized by comprising the following steps of:
selecting an opening position of a connecting channel on the side wall of a first shield tunnel which is penetrated according to the opening diameter of the connecting channel;
a first concrete patch and a second concrete patch are respectively arranged in a preset radius range at the opening position of the first shield tunnel and the position of the second shield tunnel corresponding to the opening position; the first shield tunnel and the second shield tunnel are through shield tunnels, and the communication channel is communicated with the first shield tunnel and the second shield tunnel;
after the strength of the first concrete patch and the second concrete patch reach preset strength, carrying out anchor cable opposite pulling on the first concrete patch and the second concrete patch so as to fix the segments of the first concrete patch and the first shield tunnel and the segments of the second concrete patch and the second shield tunnel;
performing a drilling operation at the open position so as to penetrate through the first shield tunnel and the second shield tunnel, installing a backing system and a drilling device in the first shield tunnel, installing an originating sleeve at the open position, wherein one end of the originating sleeve close to the open position comprises a cutter, the backing system and the drilling device drive the originating sleeve to perform a drilling action, welding a second sleeve and the originating sleeve after the originating sleeve drills a preset distance, and the backing system and the drilling device drive a welding sleeve to perform the drilling action, wherein the welding sleeve represents a sleeve formed by welding a plurality of sleeves, and after the welding sleeve drills the preset distance, welding a subsequent sleeve and the welding sleeve continuously until the originating sleeve reaches the position of the second shield tunnel;
breaking the first concrete patch and the second concrete patch and removing slag soil to form an initial channel; and
the method comprises the steps of reinforcing the initial channel, grouting in the sleeve, carrying out secondary lining and arranging a reinforcing ring beam, wherein the sleeve comprises a plurality of preformed holes, and grouting in the sleeve comprises the following steps: grouting the outer side of the sleeve through the plurality of reserved holes, and installing a fireproof door in the initial channel to form the communication channel.
2. The method of constructing a shield tunnel junction tunnel according to claim 1, wherein the reclining system includes a jack; wherein, when the welding sleeve drills the preset distance, welding the subsequent sleeve with the welding sleeve comprises:
stopping drilling and shrinking the jack when the length of the welding sleeve left in the first shield tunnel is smaller than or equal to a preset value; and
and welding the subsequent sleeve and the welding sleeve.
3. The method of constructing a shield tunnel junction according to claim 1, wherein the backing system and the drilling apparatus driving the welding sleeve to perform the drilling action comprises:
determining a baseline of the communication channel and a base point of a current drilling action; and
a drilling direction of the current drilling action is determined based on the baseline and the base point.
4. The method of constructing a shield tunnel junction according to claim 1, wherein the breaking the first concrete patch and the second concrete patch and removing the slag soil comprises:
breaking the first concrete patch and the second concrete patch and performing a digging operation on soil within the casing.
5. The method for constructing a communication tunnel of a shield tunnel according to claim 1, further comprising, before the drilling operation is performed at the opening position:
and a first water stop frame and a second water stop frame are respectively arranged in the first shield tunnel and the second shield tunnel.
6. The method for constructing a shield tunnel junction tunnel according to claim 1, further comprising, after said forming of the initial tunnel:
and performing node waterproof treatment on the sleeve.
7. The method for constructing a communication tunnel of a shield tunnel according to claim 1, further comprising, before the drilling operation is performed at the opening position:
and reinforcing the first shield tunnel and the second shield tunnel.
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