CN117231227A - TBM diversion inclined shaft construction method - Google Patents
TBM diversion inclined shaft construction method Download PDFInfo
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- CN117231227A CN117231227A CN202311022205.5A CN202311022205A CN117231227A CN 117231227 A CN117231227 A CN 117231227A CN 202311022205 A CN202311022205 A CN 202311022205A CN 117231227 A CN117231227 A CN 117231227A
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- 238000010276 construction Methods 0.000 title claims abstract description 91
- 238000009412 basement excavation Methods 0.000 claims abstract description 93
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 17
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 24
- 230000008859 change Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000005641 tunneling Effects 0.000 claims description 11
- 230000001141 propulsive effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
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Classifications
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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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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application relates to the technical field of TBM equipment construction, in particular to a TBM diversion inclined shaft construction method. It comprises the following steps: developing a TBM equipment excavation well experiment to obtain TBM equipment construction parameters; assembling TBM equipment and excavating a well, wherein the excavating mode adopts: firstly guiding holes, then expanding and excavating, and then carrying out forward excavation on TBM equipment; or the full-section TBM equipment is excavated forward; or reverse excavation of full-section TBM equipment; supporting while deslagging; monitoring surrounding rock geological parameters and TBM equipment parameters in the excavation process, and adjusting the TBM equipment according to the surrounding rock geological parameters and the TBM equipment parameters; after the well excavation is completed, the tail end of the well is reinforced, and secondary lining reinforcement is performed on the well. The application can reduce the manual labor amount of workers, improve the construction efficiency and ensure relatively good construction safety.
Description
Technical Field
The application relates to the technical field of TBM equipment construction, in particular to a TBM diversion inclined shaft construction method.
Background
The installed capacity of the pumped storage power station in China steadily increases every year, and in order to achieve the aims of carbon peak and carbon neutralization, the requirements of fourteen five in China and future power systems on the pumped storage power station are stronger, and the pumped storage power station can keep a faster development situation mountain. The water-pumping and energy-storing power station water-guiding inclined shaft has the characteristics of large section, long length, steep inclination angle and the like, meanwhile, the construction of the inclined shaft is often a heavy difficult point of construction of a water-pumping and energy-storing project, and is also very easy to be a key line for controlling the construction period, and the construction of the inclined shaft becomes a constraint factor of engineering construction. The existing traditional construction method, such as a drilling and blasting method, has the defects of low efficiency, poor section control, low tunneling efficiency, large disturbance on surrounding rocks, high requirement on construction materials, easiness in causing construction period delay and the like.
Disclosure of Invention
The application provides a TBM diversion inclined shaft construction method, which utilizes TBM equipment to excavate a diversion inclined shaft well, so as to solve the problems of low efficiency, poor section control, low tunneling efficiency, large disturbance on surrounding rocks, high requirement on construction materials, easiness in causing construction period delay and the like of the traditional construction method.
The application is realized by the following technical scheme:
a construction method of a TBM diversion inclined shaft comprises the following steps:
developing a TBM equipment excavation well experiment to obtain TBM equipment construction parameters;
assembling TBM equipment and excavating a well, wherein the excavating mode adopts: firstly guiding holes, then expanding and excavating, and then carrying out forward excavation on TBM equipment; or the full-section TBM equipment is excavated forward; or reverse excavation of full-section TBM equipment;
supporting while deslagging;
monitoring surrounding rock geological parameters and TBM equipment parameters in the excavation process, and adjusting the TBM equipment according to the surrounding rock geological parameters and the TBM equipment parameters;
after the well excavation is completed, the tail end of the well is reinforced, and secondary lining reinforcement is performed on the well.
In some alternative embodiments, the pilot hole, the post-expansion excavation, and the forward excavation of the TBM device comprise the following contents:
determining pre-digging positions of an upper inclined shaft and a lower inclined shaft and arranging a middle flat hole between the upper inclined shaft and the lower inclined shaft, wherein the angles of the upper inclined shaft and the lower inclined shaft are 60+/-5 degrees;
constructing guide slag sliding holes at pre-digging positions of the upper inclined shaft and the lower inclined shaft;
and arranging a conical cutter head on the TBM equipment and excavating an upper inclined shaft and a lower inclined shaft.
In some alternative embodiments, full face TBM device forward excavation includes the following:
determining pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section;
excavating a construction support hole at a pre-excavation position of the upper flat section;
and (3) entering the excavation position of the upper flat section from the construction branch hole and sequentially carrying out forward excavation of the upper flat section, the inclined shaft section and the lower flat section.
In some alternative embodiments, full face TBM apparatus reverse excavation includes the following:
determining pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section;
excavating a construction support hole at a pre-excavation position of the lower flat section;
performing TBM equipment assembly outside the tail water tunnel;
entering the excavation position of the lower flat section from the tail water hole and sequentially carrying out reverse excavation of the lower flat section, the inclined shaft section and the upper flat section;
and after the excavation is completed, enabling the TBM equipment to exit from the well from the upper flat section, the inclined shaft section, the lower flat section and the construction support hole in sequence.
In some alternative embodiments, the TBM device parameters include cutterhead speed, cutterhead torque, motor current values, propulsive force, propulsive cylinder pressure, actual tunneling speed, penetration, and propulsion speed potentiometer selection values.
In some alternative embodiments, the angle of the slag hole for slag tapping is set to be greater than 30 °.
In some alternative embodiments, the slag is removed by means of a slag removing method comprising a slag removing steel plate, a screw conveyor, a high-frequency vibrator and manual slag removal.
In some optional embodiments, when the well is excavated, if the rock stratum to be excavated is weak geology, the well section corresponding to the weak geology is subjected to anchor spraying support reinforcement after excavation.
In some alternative embodiments, when the TBM device is assembled, a front shield bracing system, a bracing shield bracing system, a rear matched double ABS bracing system, a mechanical anti-slip system and a rear matched anti-slip system are configured for the TBM device; wherein the safety factor of the tightening force is configured to be 3.58.
In some alternative embodiments, the step change is performed by the ABS system by separating the TBM device host from the post-matched anti-slip system, and the step change safety factor of the TBM device host is configured to be 5.55 and the step change safety factor of the post-matched anti-slip system is configured to be 12.9.
Compared with the prior art, the application has the following advantages and beneficial effects:
according to the TBM diversion inclined shaft construction method, the excavation of the shaft is carried out based on TBM equipment, so that continuous and rapid inclined shaft excavation can be realized, the construction efficiency is greatly improved, and compared with the traditional excavation method, the TBM equipment can rapidly complete the excavation work of the inclined shaft; meanwhile, the TBM equipment is used for diversion inclined shaft construction, so that groundwater can be effectively controlled, and construction risks are reduced; moreover, the TBM equipment is used for inclined shaft construction, so that the excavation position and the size of the inclined shaft can be accurately controlled, and damage to underground facilities is avoided; the TBM equipment can ensure the excavation quality of the inclined shaft through automatic control and an accurate guide system, and the stable construction performance of the TBM equipment can improve the accuracy and consistency of the geometric shape of the inclined shaft; moreover, compared with the traditional inclined shaft excavation, the method requires a large amount of manual labor, has high labor intensity and low efficiency, and can greatly reduce the amount of manual labor and labor intensity by using TBM equipment for diversion inclined shaft construction.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic construction flow diagram of a construction method of a TBM diversion inclined shaft provided by an embodiment of the application.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the application. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the application.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the application. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present application, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present application.
As shown in fig. 1, the embodiment of the application provides a construction method of a TBM diversion inclined shaft, which comprises the following steps:
s1, developing a TBM equipment excavation well experiment to obtain TBM equipment construction parameters.
In the concrete implementation, the TBM equipment is assembled outside the well of the test inclined shaft and is subjected to necessary adjustment and calibration so as to ensure the normal operation of mechanical parts and sensors, such as a correction instrument, a laser system, a hydraulic system and the like; before excavation, cleaning a well, installing temporary support, installing detection equipment, installing a sensor and the like; performing surrounding rock investigation on an inclined shaft test well, wherein the surrounding rock investigation comprises the steps of acquiring information such as rock structure, geological structure, groundwater condition and the like to determine excavation parameters and supporting schemes; and (3) excavating the experimental inclined shaft well according to preset excavation parameters and steps, and recording data such as the propelling speed, the cutter rotating speed, the cutter torque, the front and rear soil pressure, cutter abrasion and the like of TBM equipment in the excavation process.
S2, assembling TBM equipment and excavating a well, wherein the excavation mode adopts: firstly guiding holes, then expanding and excavating, and then carrying out forward excavation on TBM equipment; or the full-section TBM equipment is excavated forward; or reverse excavation of full-section TBM equipment.
In the embodiment of the application, the pilot hole is adopted, then the excavation is expanded, and when the TBM equipment is excavated forwards:
the diversion inclined shaft can be preset into a two-stage inclined shaft arrangement mode, pre-digging positions of an upper inclined shaft and a lower inclined shaft are determined on a construction site, and a middle flat hole is arranged between the upper inclined shaft and the lower inclined shaft, wherein the angles of the upper inclined shaft and the lower inclined shaft are 60+/-5 degrees;
constructing guide slag sliding holes at pre-digging positions of the upper inclined shaft and the lower inclined shaft;
and arranging a conical cutter head on the TBM equipment and excavating an upper inclined shaft and a lower inclined shaft.
The guide hole is used for establishing a guide channel in the diversion inclined shaft and providing accurate position and direction for entering and guiding TBM equipment. Through the excavation of guide hole, can control TBM equipment's entering angle and position, ensure TBM equipment correctly gets into the inclined shaft and coincide with the design position. The pre-supporting and reinforcing of the stratum can be realized through the guide hole and the expanding and digging combination mode, when the diversion inclined shaft passes through the softer stratum, the stability of the stratum can be increased by expanding and digging the stratum, the resistance to TBM equipment is reduced, and the safety and the stability of the whole digging process are improved. The guide holes and the expanding and excavating process can solidify the stratum and increase the compressive strength of the stratum, so that collapse and damage of the stratum can be avoided when TBM equipment excavates forwards, and smooth excavation is ensured. Through the guide hole and the expansion digging, the water flow in the stratum can be controlled, and the water burst risk is reduced. In the diversion inclined shaft, the water management and control are particularly important, and the pressure and speed of water flow can be reduced through the guide hole and the expanding and digging measures, so that the water level control and safety in the construction process are ensured. The load of TBM equipment in the excavation process can be reduced through the guide holes and the expanded excavation mode, and the guide holes and the expanded excavation pre-treat stratum, so that the stratum becomes more stable and hard, and the TBM equipment can encounter less resistance and difficulty in forward excavation, thereby improving the excavation efficiency and reducing the abrasion of the equipment.
When full section forward excavation is adopted:
the diversion inclined shaft can be preset to be a combination of a double flat section and a single inclined shaft section, and pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section are determined on a construction site;
excavating a construction support hole at a pre-excavation position of the upper flat section;
and (3) entering the excavation position of the upper flat section from the construction branch hole and sequentially carrying out forward excavation of the upper flat section, the inclined shaft section and the lower flat section.
According to the embodiment of the application, the pre-excavation positions of the upper flat section, the inclined shaft section and the lower flat section are determined, so that the excavation range and direction can be planned and determined in advance before construction, and the entering position and excavation path of TBM equipment can be accurately controlled. And a construction support hole is excavated at the pre-excavation position of the upper flat section, a channel for TBM equipment to enter the inclined shaft section can be provided, space is provided for subsequent forward excavation, and the construction support hole can play a role in supporting and reinforcing stratum at the same time. Through entering each section from construction branch hole and carrying out the sequential excavation, can advance according to the design requirement by sections, ensure that the full section forward excavation of drainage inclined shaft goes on smoothly, can reduce unnecessary deep excavation like this, improves excavation efficiency and security. The forward excavation section by section is beneficial to the stabilization of soil layers and the control of water pressure, and the collapse risk of the soil layers can be controlled by excavating construction support holes in advance and excavating section by section, and the water flow is effectively controlled, so that the construction safety can be improved, and the difficulty of water treatment and mud discharge is reduced. Through the forward excavation of piecewise, can also in time carry out support and reinforcement work, after each section excavation is accomplished, can support and consolidate the stratum, ensure the stability and the security of inclined shaft, reduce geological disasters's emergence.
When full-section TBM equipment is adopted for reverse excavation:
the diversion inclined shaft can be preset to be a combination of a double flat section and a single inclined shaft section, and pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section are determined on a construction site;
excavating a construction support hole at a pre-excavation position of the lower flat section;
performing TBM equipment assembly outside the tail water tunnel;
entering the excavation position of the lower flat section from the tail water hole and sequentially carrying out reverse excavation of the lower flat section, the inclined shaft section and the upper flat section;
and after the excavation is completed, enabling the TBM equipment to exit from the well from the upper flat section, the inclined shaft section, the lower flat section and the construction support hole in sequence.
In the embodiment of the application, the full-section TBM equipment reverse excavation method is adopted, so that rapid and continuous tunnel excavation can be realized, the construction efficiency is greatly improved, and compared with the traditional forward excavation method, the reverse excavation is more convenient and efficient. Meanwhile, the full-section TBM equipment reversely excavates from the tail part, then excavates the inclined shaft section and the upper flat section in sequence, and finally excavates the lower flat section, so that the earth surface subsidence and the damage to underground facilities caused by excavation can be effectively avoided. Reverse excavation is carried out by using TBM equipment, manual intervention and interference to the environment can be reduced in the excavation process, contact between workers and construction machinery is reduced, occurrence probability of construction accidents is reduced, and construction safety is improved. And the full-section TBM equipment reversely excavates without being limited by geological conditions, and can constantly excavate in various rock and soil strata, thereby ensuring the stability and consistency of construction quality. Compared with the traditional excavation method, the full-section TBM equipment reverse excavation can reduce the manual work load, shorten the construction period, reduce the construction cost and improve the economic benefit.
S3, supporting while deslagging.
In the embodiment of the application, the slag discharging mode can be reasonably selected according to different construction directions. For example, when the construction is performed in a construction direction from bottom to top, a hoistway is formed at a lower position of a land section, and in the process of excavating TBM equipment, the excavating materials can be subjected to slag sliding and deslagging; when the construction is performed in the construction direction from top to bottom, a hoistway is formed at a higher position of the land, and the excavation materials can be lifted and deslagged in the excavation process of TBM equipment. When the slag sliding and discharging mode is adopted, the inclination angle of the slag sliding hole is ensured to be larger than 30 degrees, so that the slag sliding of the excavated material can be realized through the action of gravity, the construction flow is simplified, and the construction efficiency is improved. Meanwhile, based on environmental protection and simplified sewage treatment, slag accumulation can be prevented by adopting modes such as slag sliding steel plates, screw conveyors, high-frequency vibrators, manual slag removal and the like, and smooth slag discharge is ensured.
Compared with aggregate excavated by other construction methods, aggregate excavated by adopting TBM equipment has high probability of poor grading and grain type, and various indexes of the concrete mixture can meet corresponding requirements by adjusting the mixing proportion of concrete, optimizing the mixing amount of raw materials such as cement, water reducer and the like, and additives. For example, in some embodiments, when the TBM device concrete is formulated, the water-gel ratio is set to be 0.55-0.75, and the compressive strength of the TBM device concrete is in a linear relationship with the water-gel ratio under the water-gel ratio, so that the compressive strength of the TBM device concrete is easier to control.
In the embodiment of the application, if the rock stratum is weak geology such as shale, sandstone and the like which are easy to collapse in the supporting process, the open well can be subjected to anchor spraying supporting reinforcement so as to ensure construction safety.
And S4, monitoring surrounding rock geological parameters and TBM equipment parameters in the excavation process, and adjusting the TBM equipment according to the surrounding rock geological parameters and the TBM equipment parameters.
The TBM equipment parameters can comprise cutter rotating speed, cutter torque, motor current value, propelling force, propelling cylinder pressure, actual tunneling speed, penetration and propelling speed potentiometer selection values.
S5, after the well excavation is completed, reinforcing the tail end of the well and performing secondary lining reinforcement on the well.
In some alternative embodiments, when the TBM device is assembled, a front shield bracing system, a bracing shield bracing system, a rear matched double ABS bracing system, a mechanical anti-slip system and a rear matched anti-slip system are configured for the TBM device; wherein the safety factor of the tightening force is configured to be 3.58.
In order to meet the construction requirements of large gradient and small turning tunneling of an inclined shaft, on the basis of the conventional shield type TBM equipment, the front shield of the conventional TBM equipment is optimally designed: a plurality of groups of stabilizer structures are additionally arranged around the front shield, so that stability of the front shield and a cutter head of TBM equipment in the tunneling and step changing processes of an inclined shaft is guaranteed, and the front shield is prevented from vibrating and overturning to cause tunneling efficiency reduction and guiding errors; the front shield stabilizer can be arranged to be of an oil cylinder jacking supporting shoe structure, the size of the outer circle of the front shield can be adjusted to meet the requirement of small turning, and meanwhile, additional supporting force can be provided for the front shield to further ensure the safety and stability of the inclined shaft in the step change process, and the cutter disc and the front shield are prevented from sliding backwards.
The structure of the tightening shield tightening system, which mainly provides supporting counterforce for the propulsion system, is a tightening shield tightening shoe structure. The construction environment of the diversion inclined shaft can adopt a structural form of combining the two side supporting shoes and the top supporting shoe, and the inside of the top supporting shoe adopts a hollow design and can be used as a ventilation or material transportation channel. The tightening shield adopts three supporting boots, so that the structural stability is good, and the TBM equipment can be prevented from reversing when the TBM equipment is driven in a large gradient.
In the embodiment of the application, TBM equipment needs to face the influence of stratum instability and soil pressure in the tunneling process, and a bracing system and an anti-slip system are configured to provide stable supporting force and traction force, so that stratum collapse and accidents in the tunneling process are effectively prevented. The tightening system can provide enough force to enable the TBM equipment to rapidly push and cut the stratum, the anti-slip system can ensure the stability of the TBM equipment, unstable factors in the inclined shaft tunneling process are reduced, and the overall construction efficiency is improved. The configuration of the tightening system and the anti-slip system can protect TBM equipment, reduce the vibration and instability possibility of the equipment, prolong the service life of the TBM equipment and ensure the normal operation and effective work of the TBM equipment. By configuring the tightening system and the anti-slip system and reasonably setting the safety coefficient of the tightening force, the force in the construction process can be controlled, the accuracy and stability of tunnel construction are ensured, the construction quality can be improved, and the occurrence of quality problems is reduced.
In some alternative embodiments, the step change is performed by the ABS system by separating the TBM device host from the post-matched anti-slip system, and the step change safety factor of the TBM device host is configured to be 5.55 and the step change safety factor of the post-matched anti-slip system is configured to be 12.9.
In the embodiment of the application, by configuring different safety coefficients, the reasonable force and distribution in the step change process can be ensured, the risk and potential safety problem in the step change process are reduced, and the construction safety is enhanced; in the construction process, more effective force control and distribution can be realized according to different characteristics and working requirements of a TBM equipment host and a rear matched anti-slip system, which is helpful for reducing vibration and instability of equipment and protecting the stability and functional integrity of the TBM equipment and the anti-slip system. And the step change force can be controlled more accurately, so that the TBM equipment can be docked more accurately in the step change process, unnecessary collision and damage are avoided, and the step change accuracy and success rate are improved. By reasonably configuring different safety coefficients and using an ABS system to realize separate step change of a host machine and a rear matched anti-slip system, the construction efficiency can be improved, the step change time can be shortened, the construction downtime and the adjustment time can be reduced, and the continuity and the efficiency of construction can be maintained.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. The TBM diversion inclined shaft construction method is characterized by comprising the following steps of:
developing a TBM equipment excavation well experiment to obtain TBM equipment construction parameters;
assembling TBM equipment and excavating a well, wherein the excavating mode adopts: firstly guiding holes, then expanding and excavating, and then carrying out forward excavation on TBM equipment; or the full-section TBM equipment is excavated forward; or reverse excavation of full-section TBM equipment;
supporting while deslagging;
monitoring surrounding rock geological parameters and TBM equipment parameters in the excavation process, and adjusting the TBM equipment according to the surrounding rock geological parameters and the TBM equipment parameters;
after the well excavation is completed, the tail end of the well is reinforced, and secondary lining reinforcement is performed on the well.
2. The construction method of the TBM diversion inclined shaft according to claim 1, wherein the construction method comprises the following steps of:
determining pre-digging positions of an upper inclined shaft and a lower inclined shaft and arranging a middle flat hole between the upper inclined shaft and the lower inclined shaft, wherein the angles of the upper inclined shaft and the lower inclined shaft are 60+/-5 degrees;
constructing guide slag sliding holes at pre-digging positions of the upper inclined shaft and the lower inclined shaft;
and arranging a conical cutter head on the TBM equipment and excavating an upper inclined shaft and a lower inclined shaft.
3. The method for constructing the TBM diversion inclined shaft according to claim 1, wherein the full-section TBM equipment forward excavation comprises the following steps:
determining pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section;
excavating a construction support hole at a pre-excavation position of the upper flat section;
and (3) entering the excavation position of the upper flat section from the construction branch hole and sequentially carrying out forward excavation of the upper flat section, the inclined shaft section and the lower flat section.
4. The method for constructing the TBM diversion inclined shaft according to claim 1, wherein the reverse excavation of the full-section TBM equipment comprises the following steps:
determining pre-digging positions of an upper flat section, an inclined shaft section and a lower flat section;
excavating a construction support hole at a pre-excavation position of the lower flat section;
performing TBM equipment assembly outside the tail water tunnel;
entering the excavation position of the lower flat section from the tail water hole and sequentially carrying out reverse excavation of the lower flat section, the inclined shaft section and the upper flat section;
and after the excavation is completed, enabling the TBM equipment to exit from the well from the upper flat section, the inclined shaft section, the lower flat section and the construction support hole in sequence.
5. The TBM diversion slant well construction method of claim 1 wherein the TBM equipment parameters include cutterhead rotational speed, cutterhead torque, motor current values, propulsive force, propulsive cylinder pressure, actual tunneling speed, penetration and propulsion speed potentiometer selection values.
6. The TBM diversion inclined shaft construction method of claim 2, wherein a slag chute inclination angle of slag chute slag is set to be greater than 30 °.
7. The construction method of the TBM diversion inclined shaft according to claim 6, wherein the slag is slipped by adopting a mode comprising a slag slipping steel plate, a screw conveyor, a high-frequency vibrator and manual slag removal.
8. The construction method of the TBM diversion inclined shaft according to claim 1, wherein when the shaft is excavated, if the rock stratum to be excavated is weak geology, the shaft section corresponding to the weak geology is subjected to anchor spraying support reinforcement after excavation.
9. The construction method of the TBM diversion inclined shaft according to claim 1, wherein when the TBM equipment is assembled, a front shield bracing system, a bracing shield bracing system, a rear matched double ABS bracing system, a mechanical anti-slip system and a rear matched anti-slip system are configured for the TBM equipment; wherein the safety factor of the tightening force is configured to be 3.58.
10. The construction method of the TBM diversion inclined shaft according to claim 9, wherein the step change of the TBM equipment host and the step change of the rear matched anti-slip system are separated through an ABS system, and the step change safety coefficient of the TBM equipment host is configured to be 5.55 and the step change safety coefficient of the rear matched anti-slip system is configured to be 12.9 during the step change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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