CN213807681U - Long-distance open type TBM (tunnel boring machine) single-head tunneling small-section quick dismantling system - Google Patents
Long-distance open type TBM (tunnel boring machine) single-head tunneling small-section quick dismantling system Download PDFInfo
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- CN213807681U CN213807681U CN202022778469.1U CN202022778469U CN213807681U CN 213807681 U CN213807681 U CN 213807681U CN 202022778469 U CN202022778469 U CN 202022778469U CN 213807681 U CN213807681 U CN 213807681U
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Abstract
The utility model discloses a quick-witted system of tearing open of single-end tunnelling small section of long distance open-type TBM aims at solving TBM stick weight big, the narrow and small, the too high technical problem of tearing open the quick-witted cost in place space. The quick dismantling system mainly comprises a dismantling chamber, a large part hoisting mechanism and an accessory hoisting mechanism; the large part hoisting mechanism comprises at least one hydraulic gantry crane arranged at the end position of tunneling and is used for hoisting a TBM cutter head, a headstock and a girder; the accessory hoisting mechanism comprises at least two electric hoists which are arranged at the top of the dismantling chamber through corresponding hoisting guide rails and used for dismantling and hoisting the TBM accessory equipment. The utility model has reasonable system setting, convenient operation, flexible allocation and transportation, low safety risk and small space requirement; the construction period is controllable and the cost is low.
Description
Technical Field
The utility model relates to a tunnel construction technical field, concretely relates to single-end driving small-section quick dismantling system of long distance open-type TBM.
Background
With the continuous development of tunnel construction technology, ultra-long and extra-long tunnels continuously appear; the TBM construction method has the characteristics of safety, high efficiency and the like compared with the traditional construction method, is one of the most advanced tunnel construction methods at home and abroad, and is widely applied to the construction of ultra-long and ultra-long tunnels. With the continuous maturity of construction technology, engineering technicians continuously challenge projects with larger scales and more difficult construction, and TBM construction is also changed from single-head tunneling into multiple opposite and back-to-back constructions or multiple receiving constructions in order to complete construction tasks better and faster.
In order to reduce the whole engineering investment and reduce the construction safety risk, TBM long-distance single-head excavation is adopted in the current large-scale engineering design. And after the tunneling reaches a preset mileage, the TBM needs to be disassembled, hoisted and transported outside. The conventional TBM decomposition hoisting method mainly comprises two methods:
firstly, the electric hoist is adopted for hoisting, so that the equipment is simple and the cost is lower; however, the hoisting weight of the electric hoist which is mature and widely used in the domestic technology at present is 50T, but the maximum weight of the existing single TBM can reach 125T, if the hoisting operation is carried out by using the method, two 80-100T electric hoists are needed, a special electric hoist needs to be customized, the comprehensive requirement on rocks is high, the construction difficulty is high, and the requirement on dismantling the machine cannot be met. The disassembly safety risk is large, the technology is immature, and no related qualification manufacturer in China can provide the high-power electric hoist.
Secondly, the bridge crane is adopted to be the most widely used form at present. But both sides of the excavated chamber need to use reinforced concrete walls as bridge crane foundations; the excavation space is large, the upper structure is complex, and the excavation cost is high; and is difficult to be applied to construction sites with narrow sites.
Disclosure of Invention
The utility model aims to solve the problem that a long distance open-type TBM single-head tunneling small section quick dismantling system aims at solving the technical problem that TBM single weight is big, the place space is narrow and small, the dismantling cost is difficult to control.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a long-distance open type TBM single-head tunneling small-section quick dismantling system is designed, and mainly comprises:
dismantling the machine chamber: the device is arranged at the TBM tunneling termination position and used as a place for disassembling, hoisting and transporting the TBM;
major possession lifts by crane mechanism: the hydraulic gantry crane is arranged at one end, close to a TBM head, in the dismantling chamber and used for hoisting a TBM cutter head, a headstock and a crossbeam;
the accessory hoisting mechanism comprises: the device comprises at least two electric hoists, wherein the electric hoists are arranged at the top of the dismantling chamber through corresponding hoisting guide rails and used for dismantling and hoisting TBM auxiliary equipment.
The dismantling chamber is of a gate tunnel type, the total height of an excavated section of the dismantling chamber is 12-14 m, the width of the excavated section of the dismantling chamber is 10-12 m, the construction length meets the requirement that TBM needs to step by 20m, and at least 10m space is ensured for temporary storage and transportation vehicle parking and part loading for dismantling a cutter head and a machine head frame.
The side wall of the dismantling machine chamber is provided with a support layer which is formed by C30 concrete spraying and steel bar net hanging. And a C30 concrete lining layer is arranged at the bottom of the dismantling chamber.
The large part hoisting mechanism comprises two 150T hydraulic gantries.
The accessory hoisting mechanism comprises two electric hoist groups arranged on two sides of the top of the dismantling chamber, and each electric hoist group comprises two 35t electric hoists, a matched pulley block and a hook.
Compared with the prior art, the utility model discloses a main beneficial technological effect lies in:
the system has reasonable structure arrangement, small space requirement, convenient operation, flexible allocation and transportation and low safety risk; the construction period is controllable, and the disassembly cost is low.
Drawings
Fig. 1 is the schematic view of the cross-section structure of the equipment layout in the demolition machine chamber of the utility model.
Fig. 2 is the structural schematic diagram of the longitudinal section of the equipment layout in the dismantling chamber of the utility model.
Fig. 3 is a schematic plan view of the equipment layout in the demolition chamber of the utility model.
In the above figures, 1 is a dismantling chamber, 2 and 5 are electric hoists, 3 and 4 are hoisting guide rails, 6 is a hydraulic gantry crane, 7 is a chamber wall support, 8 is a tunnel, 9 is a C30 concrete layer, 10 is a TBM tunneling section, 11 is a TBM, and 12 is a drilling and blasting section.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
Example 1: a certain construction section is a diversion tunnel, the tunnel is a non-pressure tunnel, the water flow direction is from small mileage to large mileage, two open TBMs 11 are adopted for tunneling, the excavation section is circular, and the excavation diameter is 7.03 m; and designing a longitudinal slope 1/2583 according to the total length of the contract standard section of 43.847km, wherein a downstream TBM5 tunnels 17.491km and is butted with a construction section of a drilling and blasting section 12 of an adjacent standard section (the section of the drilling and blasting section is small and does not meet TBM stepping conditions), but a design unit does not specially design for disassembling a TBM.
The open type TBM (DZ 308) used for construction of the construction standard section project is designed and manufactured for iron construction and heavy industry, the excavation diameter of the open type TBM is phi 7030 mm/phi 7000 mm (the cutter is worn to the limit), and the open type TBM is divided into a main machine, an equipment bridge and a rear matching part; the main machine mainly comprises a cutter head, a cutter head support body, a shield, a main bearing, a driving system, a main beam, a horizontal support, a rear support and the like, wherein the shotcrete trolley is positioned on the equipment bridge; the back supporting system is composed of a portal trolley, and a hydraulic power station, a transformer, a power distribution cabinet, a cable water pipe reel, a dust removal ventilation device and the like are arranged on the back supporting trolley. The TBM 11 has a whole machine length of 200 m, wherein the main machine length is 25 m, and the whole machine weight is about 1400 t.
The machine dismantling requirement is as follows: the planned construction length of the dismantling machine chamber 1 is 30 meters, the TBM needs to step by 20 meters (3 # main beam), and a 10-meter space is ensured for temporary storage of the cutter head and the disassembly of the machine head frame, parking of a transport vehicle and loading of parts.
The rapid dismantling system and the construction method thereof are as follows (see fig. 1 to 3):
1. excavation city gate type dismantling machine chamber
The overall construction scheme is as follows: the method comprises the steps of starting to pick a top-up upward step from an adjacent mark boundary drilling and blasting section 1, simultaneously carrying out 2-3 circulation expanding and excavating to the width of a standard section of a dismantling chamber 1, climbing for 20m to a standard section of the upper step of the dismantling chamber, carrying out temporary spraying and mixing support in the excavating process, erecting an anchor net and a temporary arch according to surrounding rock conditions, continuously excavating the upper step until the pile number of the dismantling chamber is excavated, then carrying out reverse skinning treatment and timely support, selecting an anchor net arch support according to the surrounding rock conditions in the support form, controlling slag quantity during skinning treatment, ensuring that the construction height of a rack meets the field requirement, and carrying out next step excavation after the skinning treatment is completed.
Secondly, construction steps:
the excavation of the urban gate type dismantling machine chamber 1 adopts a drilling and blasting method for construction, the excavation is carried out by steps, a manual hand-held air drill is used for drilling, an operation rack is equipped, the explosive charging and blasting are carried out manually, an anchor net is laid manually, and a wet blasting method is adopted for concrete spraying.
The construction sequence is as follows: the method comprises the steps of placing a rack in place → surveying and paying off → arranging holes, drilling → charging, blasting → ventilating → finding a prying top → discharging slag → spraying concrete for the first time → primary support → after inspection is qualified → entering the next cycle.
(iii) construction attention points
1) The demolition chamber 1 adopts a smooth blasting method for excavation, and how to ensure the smooth blasting construction quality is one of the key points of attention of the excavation.
2) The same rack is adopted for excavation and supporting of the chamber, and how to ensure the length of the reverse peeling section is ensured, so that the rack can be normally used during reverse peeling construction.
3) The excavation is divided into upper and lower bench method excavation, and the adjacent standard sections are still excavated by drilling and blasting method at present, and the dismantling chamber excavation is carried out after the excavation reaches the end pile number; meanwhile, the TBM is still in normal tunneling construction, so the construction period factor is also the key point of the excavation, and how to ensure that the TBM can still carry out drilling and blasting excavation while normally tunneling the TBM, the TBM and the TBM are not interfered with each other, and the minimum safe distance of the excavation construction is found.
2. Setting up hoisting equipment
The large part hoisting mechanism and the accessory hoisting mechanism are matched with each other, the large part hoisting mechanism comprises two hydraulic gantry cranes, and the large part hoisting mechanisms are arranged at one end, close to a TBM 11 machine head, in the dismantling chamber 1 and used for hoisting a TBM cutter head, a machine head frame and a girder; the accessory hoisting mechanism comprises four electric hoists, and the four electric hoists are mounted at the top of the dismantling chamber 1 through corresponding hoisting guide rails 3 and 4 and used for dismounting and hoisting the TBM accessory equipment.
Main component parameters of TBM
The specific sizes and weights of the large TBM parts mainly comprise a cutter head, a headstock, a main girder and the like are shown in the table 1.
TABLE 1 TBM Large parts composition and size, weight specifications
Lifting equipment selection
The headstock is the largest indivisible part of the TBM, weighs about 130T (including the special tool for hoisting, not including the main motor), and has dimensions 7646 x 5120 x 2782 (including the tool).
The total weight of the main drive is about Q =130T, and the maximum weight of the single-hook hoisting of the bridge crane is exceeded; therefore, the lifting operation is required, the weight of the lifting appliance is about 0.5T, and the lifting appliance is expressed by the formula Q1= K × Q (dynamic load coefficient K)1=1.1, coefficient of unbalance K2= 1.2), the actual hoisting weight of the hoisted object Q hoist = K1 × K2*（Q+0.5）
=（130+0.5）*1.1*1.2
=172.26T 。
In order to meet the requirement of dismantling the machine, the construction safety is considered, and therefore, the hoisting requirement is met by using the 2X 150T hydraulic gantry crane 6.
The accessory hoisting mechanism comprises two electric hoist groups arranged on two sides of the top of the dismantling chamber, and each electric hoist group comprises two 35t electric hoists 2 and 5 and a matched pulley block and a hook.
Overview of TBM dismantling machine
The TBM dismantling work is divided into three main stages, namely a preparation work stage, a dismantling work stage and a finishing stage after dismantling.
The construction length of the urban gate type dismantling tunnel 1 is 30 meters, the TBM is stepped to the position of 10 meters, and a cutter head is dismantled. And after the cutter head is conveyed away, the TBM is stepped to a position of 8 meters, and the main drive is dismounted. And (4) after the main drive is lifted, the TBM 11 loses the stepping function, and the main beam (three sections) of the machine is dismounted in situ.
Cutter head → top shield → top left and right shields → main motor → left and right side shields → main drive → bottom shield → propulsion system → shoe → first main girder → second main girder → rear support → saddle → equipment bridge → guniting bridge → first trailer → rear support trailer are dismantled in turn.
② TBM dismantling step
1) Disassembling the main machine: after the cutter head is removed, the cutter head is removed in order from the top shield → the left and right shields → the attachment → the main drive.
2) And (3) rear matched disassembly: when the TBM 11 host machine is stepped to a preset area, all hydraulic and electric pipelines and detachable auxiliary equipment are detached and then matched, the auxiliary equipment is temporarily placed on a platform at the bottom of the trailer, after the host machine is detached, the host machine is pulled to the area of the hoisting equipment by a locomotive, the auxiliary equipment is hoisted and disassembled, and then the mechanical equipment of the trailer is disassembled.
Notice items
1) The TBM equipment has large weight and size, complex equipment manufacturability, wide assembly and disassembly aspects, and large weight and size of a single piece, and the safety and quality control in the hoisting and transporting processes in a hole are undoubtedly difficult points in the disassembling process.
2) All parts of the dismantling machine need to be transported out of adjacent mark sections, how to reduce construction interference on the temporary mark sections is considered when the adjacent mark sections are in a tunneling stage, construction peak periods of the temporary mark sections are avoided as much as possible, and the alternate transportation mode is selected by utilizing the construction idleness of the temporary mark sections.
The present invention has been described in detail with reference to the accompanying drawings and examples; however, those skilled in the art will recognize that various changes may be made in the above embodiments without departing from the spirit of the invention, or equivalent substitutions of related parts, structures, and materials may be made to the above embodiments, thereby forming various embodiments, which are common variations of the invention and will not be described in detail herein.
Claims (6)
1. A long-distance open type TBM single-head tunneling small-section quick dismantling system is characterized by comprising
Dismantling the machine chamber: the device is arranged at the TBM tunneling termination position and used as a place for disassembling, hoisting and transporting the TBM;
major possession lifts by crane mechanism: the hydraulic gantry crane is arranged at one end, close to a TBM head, in the dismantling chamber and used for hoisting a TBM cutter head, a headstock and a crossbeam;
the accessory hoisting mechanism comprises: the device comprises at least two electric hoists, wherein the electric hoists are arranged at the top of the dismantling chamber through corresponding hoisting guide rails and used for dismantling and hoisting TBM auxiliary equipment.
2. The long-distance open type TBM single-head tunneling small-section quick dismantling system as claimed in claim 1, wherein the dismantling chamber is of an urban door opening type, the total height of an excavated section is 12-14 m, the width is 10-12 m, the construction length meets the requirement that the TBM needs to step by 20m, and at least 10m space is guaranteed for temporary storage of a cutter head and a machine head frame for dismantling, and for parking of a transport vehicle and loading of parts.
3. The long-distance open-type TBM single-head tunneling small-section quick dismantling system as claimed in claim 1, wherein said dismantling chamber side wall is provided with a support layer which is formed by C30 concrete spraying and steel bar net hanging.
4. The long-haul open-type TBM single-headed low-profile quick breaker system of claim 1 wherein the breaker chamber bottom is provided with a C30 concrete lining.
5. The long-distance open-type TBM single-head tunneling small-section quick dismantling machine system as claimed in claim 1, wherein said large hoisting mechanism comprises two 150T hydraulic gantries.
6. The long-distance open type TBM single-head tunneling small-section quick dismantling system as claimed in claim 1, wherein the accessory hoisting mechanism comprises two electric hoist groups arranged on two sides of the top of the dismantling chamber, and each electric hoist group comprises two 35t electric hoists and a matched pulley block and a matched lifting hook.
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| CN202022778469.1U CN213807681U (en) | 2020-11-26 | 2020-11-26 | Long-distance open type TBM (tunnel boring machine) single-head tunneling small-section quick dismantling system |
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| CN112282779A (en) * | 2020-11-26 | 2021-01-29 | 中铁隧道局集团有限公司 | Long-distance open type TBM (tunnel boring machine) single-head tunneling small-section quick dismantling system and construction method |
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| CN112282779A (en) * | 2020-11-26 | 2021-01-29 | 中铁隧道局集团有限公司 | Long-distance open type TBM (tunnel boring machine) single-head tunneling small-section quick dismantling system and construction method |
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