CN114151093A - Construction method for continuously pushing shield through vertical shaft in air and carrying out secondary starting - Google Patents
Construction method for continuously pushing shield through vertical shaft in air and carrying out secondary starting Download PDFInfo
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- CN114151093A CN114151093A CN202111336224.6A CN202111336224A CN114151093A CN 114151093 A CN114151093 A CN 114151093A CN 202111336224 A CN202111336224 A CN 202111336224A CN 114151093 A CN114151093 A CN 114151093A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 9
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000009545 invasion Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
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- 239000000463 material Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
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- 229920000742 Cotton Polymers 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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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
- E21D11/08—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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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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
- 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
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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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
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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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)
- Structural Engineering (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method for continuously pushing a shield through a vertical shaft in an empty way and carrying out secondary starting, which adopts a horizontal transportation device and carries out real-time monitoring on the connecting position of a horizontal support and an inclined strut of a starting reaction frame and the displacement condition of the tail end of the inclined strut by a monitoring means of automatic monitoring; the risk of manual measurement is reduced, the purpose of real-time monitoring is achieved, and the construction safety and controllability are ensured; the method aims to solve the technical problems that the secondary starting difficulty is high, the reaction frame is mounted and dismounted, the manual monitoring data feedback efficiency is limited, and the construction risks such as monitoring operation are increased due to the fact that large-scale equipment cannot enter a field and materials cannot be transported in a narrow space of a vertical shaft in many projects at present.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a construction method for continuously pushing a shield through a vertical shaft in an empty mode and carrying out secondary starting.
Background
With the rapid advance of the urbanization process, the urban rail transit is well-established. The shield construction method is very suitable for the construction of urban tunnels, and establishes a dominance in the urban subway tunnel construction technology. In recent years, shield technology is well applied and developed, shield launching, arrival, station passing and other technologies are mature day by day, but shield air pushing is not mature, a narrow-space underground excavation tunnel is constructed through a structure, and a technology for realizing secondary launching in the underground excavation tunnel is not mature.
Due to the influence of narrow space of the underground excavation tunnel, large construction equipment cannot enter a field, the construction risk of assembling and disassembling negative ring pipe pieces required by starting the shield through the vertical shaft is high, the process conversion is slow, the cost is easily increased, and the construction period is easily prolonged; meanwhile, the stress condition of the shield tunneling machine in the space-time thrust process is complex, and particularly the main bearing is easily damaged due to the bias condition; the monitoring means of the stress deformation condition of the reaction device in the starting process is single, the field operation space is limited, the difficulty is easily caused to the development of monitoring operation of individual key parts, the information feedback is not timely, and great risks and challenges are brought to the shield air thrust advancing, the reaction frame erecting and the negative ring pipe piece dismantling. The problem that how to efficiently and smoothly realize the shield air-pushing stepping and the secondary starting of the shield on the premise of ensuring the safety is urgently needed to be solved.
Disclosure of Invention
The invention aims to provide a construction method for continuously pushing a shield through a vertical shaft in an empty mode and carrying out secondary starting, and aims to solve the technical problems that construction risks such as high secondary starting difficulty, limited efficiency of reaction frame installation and dismantling, manual monitoring data feedback, monitoring operation and the like are increased due to the fact that large-scale equipment cannot enter a field and materials cannot be transported in a narrow space of the vertical shaft in many projects at present.
In order to solve the technical problems, the invention adopts the following technical scheme:
a construction method for continuously pushing a shield through a vertical shaft in an empty mode and carrying out secondary initiation is designed, and comprises the following steps:
(1) constructing a concrete guide platform and compounding a full section by underground excavation and air pushing, and sequentially performing guide platform construction, checking a center line of the guide platform, processing an invasion part of a primary support section, chiseling underexcavated positions of an underground excavation tunnel and a vertical shaft guide platform and paving a track;
(2) hoisting the shield machine and arranging a segment horizontal transportation device, sequentially carrying out the back matching and host hoisting operation of the shield machine, laying a portal frame and a steel plate on the right side of an originating well, transversely laying two rows of tracks and arranging a segment translation trolley on the tracks;
(3) installing a counterforce device, wherein the steps sequentially comprise: the inclined struts on the two sides of the reaction frame are supported by H-shaped steel, the bottom longitudinal horizontal support is supported on the bottom plate by the shaped steel, the bottom reaction frame is installed, the reaction frames on the two sides are installed, and the reaction frames on the two sides of the upper part and the top reaction frame are installed;
(4) a top supporting measure is welded between the cutter head and the soil bin: the cutter head is connected with the host machine through the main bearing, and a section steel supporting top is welded between the bottom of the cutter head and the soil bin partition plate after the cutter head is pushed to a fixed position;
(5) automatic monitoring: the method comprises the following steps of monitoring the connection position of a horizontal support and an inclined support of an initial reaction frame and the displacement condition of the tail end of the inclined support in real time by means of automatic monitoring and manual rechecking, and monitoring the deformation condition of each key part of the reaction frame in the initial process;
(6) piling up the bean gravels: one part of the bean gravel is stacked above the central knife in front of the cutter head, and the other part of the bean gravel in the hole is stacked towards two sides;
(7) controlling shield empty-pushing parameters: the thrust of the early-stage air-thrust construction is less than or equal to 500 t;
(8) positioning a shield through a vertical shaft negative ring pipe sheet;
(9) assembling negative ring pipe pieces: the segment is replaced by profile steel support, staggered joint assembly is adopted to prevent the segment from out of round, and drawknot support is adopted to prevent the segment from deviating from the tail of the shield to two sides;
(10) secondary initiation propulsion, comprising in sequence: clearing dregs at a hole opening, installing a temporary sealing device, adjusting a tunneling posture, plugging and grouting a hole door and propelling a duct piece.
Preferably, in the step (2), the track pitch of the transverse laying is 700-800 mm.
Preferably, in the step (3), the H-shaped steel and the reaction frame are arranged at an angle of 40-55 degrees.
Preferably, in the step (4), 100mm section steel is welded to the positions of 4 points, 6 points and 8 points of the cutter head respectively to support the top.
Preferably, in the step (9), the L2 and the K blocks in the negative ring segment are replaced by section steel supports, and the segment pulling supports are respectively used for segment pulling at the 11-point, 1-point, 4-point and 8-point directional positions in the segment by using 40mm square steel.
Preferably, in the step (10), the grouting for blocking the portal comprises synchronous grouting for shield tail grouting and double-liquid grouting for grouting in a secondary reinforcement grouting mode in the portal.
Compared with the prior art, the invention has the main beneficial technical effects that:
1. the horizontal duct piece conveying device reduces duct piece damage caused by duct piece hoisting, accelerates duct piece conveying and saves construction time.
2. The inclined struts on the two sides of the reaction frame are supported by H-shaped steel at an angle of 40-55 degrees with the reaction frame, the bottom longitudinal horizontal supports are supported on the bottom plate by the shaped steel, the bottom reaction frame is firmly welded with the bottom after the installation and the reinforcement of the reaction frame on the two sides are completed, and the reaction frames on the two sides of the upper part and the top part are sequentially installed to form a whole. The risk of deformation and instability of the reaction frame caused by displacement overrun due to overlarge stress on the bottom of the reaction frame is effectively avoided.
3. The invention can monitor the connection position of the horizontal support and the inclined support of the starting reaction frame and the displacement condition of the tail end of the inclined support in real time. On one hand, the risk of manual measurement is reduced, and meanwhile, the purpose of real-time monitoring is achieved, and the construction safety and controllability are ensured.
Drawings
FIG. 1 is a schematic view of installation of a transverse rail in a project construction process in the embodiment of the present invention.
FIG. 2 is a schematic diagram of a section steel supporting top in the project construction process in the embodiment of the invention.
FIG. 3 is a schematic diagram of the number of assembled rings of negative ring duct pieces in the project construction process in the embodiment of the present invention.
FIG. 4 is a drawing of the interior of the segment during the construction of the project according to the embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of shield empty pushing in the project construction process in the embodiment of the present invention.
In the above figures, 1 is a side track, 2 is a middle track, 3 is a line center line, 4 is a transverse track, 5 is a segment conveying trolley, 6 is a cutter head panel, 7 is a primary support surface of an underground excavation tunnel, 8 is 100mm section steel, 9 is a # 1 shaft, 10 is a # 2 shaft, 11 is bean gravel and 12 is square steel.
Detailed Description
The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.
In the description of the technical solutions of the present invention, it should be understood that the orientations or positional relationships indicated as referring to the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example (b): guangzhou subway line thirteen phase engineering (plum blossom section)
The construction method for continuously pushing the shield through the vertical shaft in an empty way and carrying out secondary starting comprises the following steps in detail with reference to fig. 1-5:
(1) concrete guide platform construction and hidden excavation and empty pushing full-section rechecking
The method comprises the steps of completing guide platform construction before the shield machine goes into the well, checking a tunnel and a guide platform in a full section, checking the center line of the guide platform, processing the invasion limit part of a primary support section, chiseling underexcavated positions of an underground excavated tunnel and a 2# vertical shaft guide platform, and then laying a track to ensure that air pushing is smooth in a stepping mode.
(2) Set up section of jurisdiction horizontal transportation device
Set up section of jurisdiction horizontal transport device in the pit, lay door sub-frame and steel sheet and the door sub-frame that starts and form a whole on well right side that starts promptly, lay two horizontal tracks 4, the track interval is 700~800mm, and horizontal track 4 is located the change rail below, need advance the cushion at well rail and change rail and reserve sufficient lower part headroom, adopt horizontal input section of jurisdiction. The shield constructs quick-witted right side and adopts the steel sheet form of spreading above the door style of calligraphy frame, forms the section of jurisdiction and lays the platform, lays equidistant rail above the platform and as section of jurisdiction side direction transportation track, adopts section of jurisdiction travelling bogie 5+ electric block to reach the purpose of transporting the section of jurisdiction above the track.
(3) Mounting counter-force device and automatic monitoring
The inclined struts on the two sides of the reaction frame are supported by H-shaped steel at an angle of 40-55 degrees with the reaction frame, and the bottom longitudinal horizontal supports are supported on the bottom plate by the shaped steel. The reaction frame is lifted and divided into an upper part and a lower part, the bottom reaction frame is lowered into a guide table reserved groove by an electric hoist, the bottom block is adjusted to a design position, a rechecking position is measured, and then welding reinforcement is added. And after the bottom reaction frame is installed and reinforced, the two side reaction frames must be firmly welded with the bottom, and the two sides of the upper part and the top reaction frame are sequentially installed to form a whole. In consideration of the condition of uneven stress in the actual tunneling process, in order to ensure that the deformation condition of each key part of the reaction frame in the starting process is mastered in time, the connecting position of the horizontal support and the inclined strut of the starting reaction frame and the displacement condition of the tail end of the inclined strut are monitored by means of automatic monitoring and manual rechecking, monitoring data acquisition, sorting and analysis work is carried out in time, and the accuracy and the efficiency of the monitoring work are optimized; and (3) adopting a resistance strain measurement method to monitor the stress of each main component of the shield starting reaction frame in real time. The upper and lower beams and the left and right upright posts of the reaction frame are in bending deformation, the surface stress of the reaction frame can be approximately regarded as a one-way stress state, each support rod can also be approximately regarded as a one-way stress state along the axial direction, and the patch measurement is designed according to the single stress state. A temperature self-compensation resistance strain gauge with the resistance value of 350 omega is adopted, and 4 strain gauges are vertically and horizontally stuck to each measuring point to form a full-bridge circuit for measurement.
(4) Measures for welding and supporting top between cutter head and soil bin
The cutter head is connected with the host machine through the main bearing in the air-pushing construction process, and after the cutter head is pushed to a fixed position, a 100mm section steel supporting top is welded between the bottom of the cutter head and the soil bin partition plate and is specifically arranged at the positions of 4 points, 6 points and 8 points of the cutter head.
(5) Piling of pea gravel
When the shield machine pushes in the tunnel empty, because the place ahead resistance is very little, need to spray pea gravel 11 around shield body and the section of jurisdiction to increase frictional resistance, increase thrust, crowded tight section of jurisdiction stagnant water adhesive tape. The secondary piling of the bean gravel 11 is divided into two parts: one part of the front part of the cutter head is piled above the central cutter (for increasing the friction resistance), and the other part of the front part of the cutter head piles the bean gravel 11 which is originally transported into the hole towards two sides. The gravel is needed by about 5.2 square per meter, and the gravel is needed by about 187.2m for the 60m underground tunnel in consideration of carrying out the heavy cultivation according to 3.12m per meter in actual construction on site. It is necessary to ensure that the front gravel pack is above the center knife position to ensure sufficient counter force.
(6) Shield empty-pushing parameter control
And adjusting the stroke of each group of propelling hydraulic cylinders according to the relation between the cutter head and the guide platform, so that the shield attitude is propelled along the direction of the designed line. When the thrust is temporarily not more than 500t during the early-stage air thrust construction, if the thrust exceeds 500t, a technical responsible person needs to report the thrust to apply, and the thrust is strictly prohibited from increasing privately. The pressure of the lower hydraulic cylinder is slightly larger than that of the upper hydraulic cylinder.
(7) Positioning of shield through-shaft negative ring pipe piece
6-ring negative ring pipe pieces (40-45 rings) need to be assembled together when the 2# vertical shaft 10 is tunneled, and the negative ring pipe pieces used for starting the right line for the first time are used for saving cost by 40-45 rings. Bolts and waterproof materials of the negative ring segment: the pipe piece is only adhered with a butyronitrile cork rubber plate (longitudinal joint) and a cork gasket (circular joint), a water stop strip and a self-adhesive rubber sheet are not adhered, and a water-swelling rubber ring is not required to be added on a pipe piece connecting bolt, so that a waterproof material is required to be normally used from 0 ring.
(8) Assembling negative ring pipe pieces, and adopting staggered joint splicing and drawknot support
The negative ring duct piece is composed of B1, B2, B3, L1, L2 and K blocks, the duct piece L2 and the K blocks are supported and replaced by profile steel, and staggered assembly is adopted to prevent the duct piece from being out of round. And (3) pulling and supporting: and (3) segment drawbars are carried out at four point positions of 11 points, 1 point, 4 points and 8 points by using square steel 12, so that the segment is prevented from deviating from the tail of the shield to two sides. Supporting the top: in order to prevent the pipe piece from floating upwards, the whole circular pipe piece is bound by a steel wire rope and fixed in a concrete bottom plate of the vertical shaft (a concrete bottom plate bar-planting embedded hanging ring).
(9) Secondary initiation of propulsion
Before the shield is formally started, the muck at the opening is cleaned, and the installation of temporary sealing devices such as an opening sealing fixing plate, a hinge pressing plate, a portal curtain cloth rubber plate and the like is completed. Before the shield machine enters the soil body, the tunneling direction is given by the measuring group according to the actual posture of the shield machine in the hoisting well, the direction of the shield machine is adjusted according to the given posture, and the posture is kept stable as much as possible during tunneling. Two modes are adopted for grouting for blocking the portal: the first mode is synchronous grouting of shield tail, the synchronous grouting adopts double-liquid slurry, the synchronous grouting is started after the shield tail passes through a cord fabric rubber plate, and the grouting amount from a planned portal extension steel ring to a bored pile section is 8m for carrying out thin-film dry-method planting. If the sealing performance of the rubber plate of the hole door curtain cloth is good and the slurry leakage is less, the method is directly adopted for grouting; if the sealing of the tunnel door is poor, the gap can be filled by cotton yarn and the like, and double-liquid grouting is performed in a secondary reinforcing grouting mode in the tunnel. When the first negative ring pipe piece is pushed backwards, the strokes of the pushing oil cylinders are controlled, and the strokes of all the pushing oil cylinders are kept consistent as much as possible. After the segment is pushed, the gap between the segment and the reaction frame is wedged by a steel plate.
The horizontal transportation device is adopted, so that the damage of the duct piece caused by duct piece hoisting is reduced, the duct piece transportation is accelerated, and the construction time is saved. In addition, the connection position of the horizontal support and the inclined support of the original reaction frame and the displacement condition of the tail end of the inclined support are monitored in real time through an automatic monitoring means. On one hand, the risk of manual measurement is reduced, and meanwhile, the purpose of real-time monitoring is achieved, and the construction safety and controllability are ensured. The invention has great popularization significance, and the technology can be adopted for projects which are similar to shields and continuously pushed through a vertical shaft in an empty mode and are initiated for the second time.
While the invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes in the details of the embodiments may be made without departing from the spirit of the invention, and various changes in the details of construction and materials may be substituted for elements thereof to form various embodiments, which are within the scope of the invention and are not intended to be limited to the details of the embodiments.
Claims (6)
1. A construction method for continuously pushing a shield through a vertical shaft in an empty way and carrying out secondary starting is characterized by comprising the following steps:
(1) constructing a concrete guide platform and carrying out concealed excavation and empty pushing full-section compounding: conducting guide platform construction, checking a center line of the guide platform, processing a primary support section invasion part, chiseling a subsurface tunnel and a shaft guide platform underexcavation position, and laying a track in sequence;
(2) shield constructs quick-witted hoist and mount and sets up section of jurisdiction horizontal transport device: sequentially carrying out the back matching of the shield machine and the host hoisting operation, laying a gate frame and a steel plate on the right side of the starting well, transversely laying two rows of tracks and arranging a segment translation trolley on the tracks;
(3) installing a counterforce device: inclined struts on two sides of the reaction frame are supported by profile steel, a bottom longitudinal horizontal support is supported on the bottom plate by the profile steel, the bottom reaction frame is installed, the reaction frames on two sides are installed, and the reaction frames on two sides of the upper part and the top reaction frame are installed;
(4) a supporting top is welded between the cutter head and the soil bin: the cutter head is connected with the host machine through the main bearing, and a section steel supporting top is welded between the bottom of the cutter head and the soil bin partition plate after the cutter head is pushed to a fixed position;
(5) monitoring: the deformation condition of the connecting position of the horizontal support and the inclined support of the reaction frame is monitored in real time by adopting a sensor on-line monitoring and manual rechecking method, so that the condition that the stress of the shield equipment is not uniform in the starting process due to the deformation of the reaction frame is prevented;
(6) piling up the bean gravels: one part of the bean gravel is stacked above the central knife in front of the cutter head, and the other part of the bean gravel in the hole is stacked towards two sides;
(7) controlling shield empty-pushing parameters: the thrust of the early-stage air-thrust construction is less than or equal to 500 t;
(8) positioning a shield through a vertical shaft negative ring pipe sheet;
(9) assembling negative ring pipe pieces: the segment is replaced by profile steel support, staggered joint assembly is adopted to prevent the segment from out of round, and drawknot support is adopted to prevent the segment from deviating from the tail of the shield to two sides;
(10) and (3) secondary starting propulsion: and sequentially cleaning dregs at the opening of the hole, installing a temporary sealing device, adjusting the tunneling posture, plugging and grouting the hole door and propelling the duct piece.
2. The construction method for continuously pushing the shield through the vertical shaft in the air and carrying out secondary starting according to claim 1, wherein in the step (2), the track spacing between the transverse laying tracks is 700-800 mm.
3. The construction method for shield continuous empty pushing through shaft and secondary starting according to claim 1, characterized in that in step (3), the section steel is H-shaped steel and is arranged at 40-55 degrees with the reaction frame.
4. The construction method for continuously pushing the shield through the shaft and secondarily starting according to claim 1, wherein in the step (4), 100mm section steel is welded on the supporting top at the positions of 4 points, 6 points and 8 points of the cutter head respectively.
5. The construction method for shield continuous empty pushing through shaft and secondary starting according to claim 1, characterized in that in step (9), L2 and K blocks in the negative ring segment are replaced by section steel supports, and the segment pulling supports are used for segment pulling with 40mm square steel at 11-point, 1-point, 4-point and 8-point directional positions in the segment respectively.
6. The construction method for continuously pushing the shield through the vertical shaft in an empty way and carrying out secondary starting by the shield according to claim 1, wherein in the step (10), the tunnel portal blocking grouting comprises shield tail grouting synchronous grouting and secondary reinforcing grouting in the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336224.6A CN114151093B (en) | 2021-11-12 | 2021-11-12 | Construction method for shield to continuously push through vertical shaft in empty mode and initiate in secondary mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336224.6A CN114151093B (en) | 2021-11-12 | 2021-11-12 | Construction method for shield to continuously push through vertical shaft in empty mode and initiate in secondary mode |
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| Publication Number | Publication Date |
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| CN114151093A true CN114151093A (en) | 2022-03-08 |
| CN114151093B CN114151093B (en) | 2024-06-18 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006207140A (en) * | 2005-01-25 | 2006-08-10 | Shimizu Corp | Shield machine and tunnel construction method using the same |
| CN104775825A (en) * | 2015-05-06 | 2015-07-15 | 中铁四局集团有限公司 | Shield machine single well overall originating construction method |
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| CN214464175U (en) * | 2021-01-05 | 2021-10-22 | 中铁隧道集团二处有限公司 | Assembled shield constructs empty counterforce device that pushes away of TBM complete machine |
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2021
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| JP2006207140A (en) * | 2005-01-25 | 2006-08-10 | Shimizu Corp | Shield machine and tunnel construction method using the same |
| CN104775825A (en) * | 2015-05-06 | 2015-07-15 | 中铁四局集团有限公司 | Shield machine single well overall originating construction method |
| JP2017128898A (en) * | 2016-01-19 | 2017-07-27 | 清水建設株式会社 | Shield machine transfer system and large section tunnel construction method |
| CN109236305A (en) * | 2018-10-26 | 2019-01-18 | 中铁第勘察设计院集团有限公司 | Shield sky is pushed away through bored tunnel and the secondary construction method and its structure originated |
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| WO2021120991A1 (en) * | 2019-12-16 | 2021-06-24 | 中铁一局集团有限公司 | Method for reconstructing shield tunnel for mining construction |
| CN112065412A (en) * | 2020-09-01 | 2020-12-11 | 中铁九局集团第四工程有限公司 | Shield air-pushing construction method for closed section of mine tunnel and guide platform used by shield air-pushing construction method |
| CN214464175U (en) * | 2021-01-05 | 2021-10-22 | 中铁隧道集团二处有限公司 | Assembled shield constructs empty counterforce device that pushes away of TBM complete machine |
| CN113216990A (en) * | 2021-06-03 | 2021-08-06 | 中铁五局集团有限公司城市轨道交通工程分公司 | Starting and rapid slag discharging method in limited space of shield tunneling machine |
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| CN114151093B (en) | 2024-06-18 |
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