CN109973130B - Construction system and method for realizing one-time traction of extra-long tunnel anchor narrow space by main cable strand - Google Patents
Construction system and method for realizing one-time traction of extra-long tunnel anchor narrow space by main cable strand Download PDFInfo
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- CN109973130B CN109973130B CN201910342163.0A CN201910342163A CN109973130B CN 109973130 B CN109973130 B CN 109973130B CN 201910342163 A CN201910342163 A CN 201910342163A CN 109973130 B CN109973130 B CN 109973130B
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 124
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 7
- 238000007796 conventional method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction system and a construction method for realizing one-time traction of an ultra-long tunnel anchor narrow space by a main cable strand by utilizing a traction system conversion device; the construction system is provided with a traction system and a conversion device; the operation comprises the following steps: (1) an arrangement of traction systems; (2) an arrangement of conversion means; (3) conversion method: (1) pulling the strand pulling rope before conversion; (2) the first conversion device is used for hanging a traction rope; (3) the second conversion device is separated from the traction rope; (4) the second conversion device is used for hanging the traction rope; (5) the third conversion device is separated from the traction rope; (6) and a third conversion device is used for hanging the traction rope. When the cable is suitable for the tunnel anchor with longer length, narrow space and larger gradient, the main cable strand can be efficiently and safely pulled in place at one time by utilizing the conversion device arranged on the cable saddle portal frame.
Description
Technical Field
The invention relates to the field of civil engineering suspension bridge construction, in particular to a construction system and a method for realizing one-time traction of an ultra-long tunnel anchor narrow space by a traction system switching device.
Background
When the main cable strand of the suspension bridge is pulled to the tunnel anchor cable saddle, large mechanical equipment cannot enter a tunnel for construction due to gradient change and narrow space, and the conventional main cable strand pulling process cannot achieve one-time pulling in place, so that the system can achieve one-time pulling in place through simple conversion of the device, and the pulling efficiency is improved.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides a construction system and a construction method for realizing one-time traction of the anchor narrow space of the ultra-long tunnel by the main cable strand, which can efficiently and safely traction the main cable in place.
The invention is realized by constructing a construction system for realizing one-time traction of an ultra-long tunnel anchor narrow space by a main cable strand, which is characterized in that: the construction system is provided with a traction system and a conversion device;
the traction system mainly comprises a cable saddle portal, a chain block, a catwalk portal, catwalk portal guide wheel sets, a main traction winch, a secondary traction winch, a traction cable, a puller, a catwalk bottom plate traction, a horizontal guide wheel and an anchoring steel pipe; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller to finally form a traction system; the catwalk portal frame guide wheel sets are arranged on catwalk portal frames, the horizontal guide wheels are arranged on the anchoring steel pipes, the conversion device is arranged in a cable saddle portal frame in a tunnel anchor, 3 catwalk portal frame guide wheel sets are arranged on the coaxial line, and the catwalk portal frame guide wheel sets are fixed on primary arch ring section steel of the tunnel anchor through a chain block; the puller is arranged on the traction rope, and the traction rope passes through the corresponding rotating wheels of the 3 conversion devices and then bypasses the guide wheels at the bottom to be connected to the horizontal guide wheels.
A construction method for realizing one-time traction of a main cable strand in an ultra-long tunnel anchor narrow space is characterized by comprising the following steps: the method is realized in the following manner;
step one: arrangement of the traction system: the traction system mainly comprises the following components: the cable saddle support pier portal frame, tunnel anchor portal frame, tower top arc guide wheel set, traction winch (main and auxiliary), traction cable, puller, catwalk portal frame guide wheel set, supporting rollers at each part, related guide wheels and the like; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller to finally form a traction system;
step two: arrangement of the conversion means: the conversion device is arranged in a cable saddle dispersing portal frame in the tunnel anchor, 3 conversion devices are arranged on the coaxial line, and the conversion device is fixed on the primary arch ring section steel of the tunnel anchor through a chain block;
step three: the conversion operation method comprises the following steps:
(1) pulling the strand pulling rope before conversion; the main cable strand is pulled to the front end of the tunnel anchor and cable saddle by a conventional method and passes through a first conversion device, the process is to effectively raise the height of a pulling rope at the tunnel anchor and cable saddle, the pulling rope is required to be hung in the rotating wheel grooves of a second conversion device and a third conversion device, and the height of the pulling rope is controlled by a chain block;
(2) the first conversion device hangs the traction rope: when the main cable strand anchor head is pulled to approach the first conversion device, controlling and reducing the pulling speed, stopping pulling when the cable strand anchor head exceeds 50cm of the first conversion device, lowering a chain block at the first conversion device, hooking a block hook on the conversion device, hooking a pulling rope of a pulling system in a rotating wheel groove of the first conversion device, and slowly lifting the chain block due to the limitation of space height, so that the cable strand anchor head is lifted to a certain height without contacting with the ground;
(3) the second switching device is separated from the traction rope: continuing to pull the main cable strand, stopping pulling when the cable strand anchor head is 50cm away from the second conversion device, separating the second conversion device from the pulling rope, and continuing to pull to enable the cable strand anchor head to pull smoothly through the second conversion device;
(4) the second conversion device hangs the traction rope: when the cable strand anchor head passes through the second conversion device, traction is stopped, a traction rope is hung in a wheel groove of a rotating wheel of the second conversion device, the traction rope is lifted to the maximum height by using a chain block, and the main cable strand is continuously pulled;
(5) the third switching device is separated from the traction rope: when the cable strand anchor head is pulled to be 50cm away from the third conversion device, the first conversion device and the second conversion device are used as fulcrums, the third conversion device is separated from the pulling rope, and the pulling is continued;
(6) the third conversion device hangs the traction rope: after the cable strand anchor head passes through the third conversion device, if the traction cable strand is continuously contacted with the loose saddle pier cap concrete to generate friction so as to damage the main cable strand due to the limitation of space height, the traction is stopped just after the cable strand anchor head passes through the third conversion device, the traction rope is hung in a rotating wheel groove of the third conversion device, the main cable strand is lifted by using the chain block, and the main cable strand is continuously pulled in place once.
The invention has the following advantages: the invention discloses a construction system and a construction method for realizing one-time traction of an ultra-long tunnel anchor narrow space by a main cable strand by utilizing a traction system conversion device; the construction system is provided with a traction system and a conversion device; the operation comprises the following steps: (1) an arrangement of traction systems; (2) an arrangement of conversion means; (3) conversion method: (1) pulling the strand pulling rope before conversion; (2) the first conversion device is used for hanging a traction rope; (3) the second conversion device is separated from the traction rope; (4) the second conversion device is used for hanging the traction rope; (5) the third conversion device is separated from the traction rope; (6) and a third conversion device is used for hanging the traction rope. When the cable is suitable for the tunnel anchor with longer length, narrow space and larger gradient, the main cable strand can be efficiently and safely pulled in place at one time by utilizing the conversion device arranged on the cable saddle portal frame.
Drawings
FIG. 1 is a traction system and conversion device layout;
FIG. 2 is a schematic diagram of a switching device arrangement;
fig. 3 is a schematic diagram of a switching device.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a construction system for realizing one-time traction of an ultra-long tunnel anchor narrow space by improving a main cable strand, which is characterized in that: the construction system is provided with a traction system and a conversion device;
the traction system mainly comprises a cable saddle portal 1, a chain block 2, a catwalk portal 3, catwalk portal guide wheel groups 4, a main traction winch, a secondary traction winch, a traction cable 5, a puller 6, a catwalk bottom plate traction 7, a horizontal guide wheel 8 and an anchoring steel pipe 9; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller 6 to finally form a traction system; the catwalk door frame guide wheel group 4 is arranged on the catwalk door frame 3, the horizontal guide wheel 8 is arranged on the anchoring steel pipe 9, the conversion device 10 is arranged in the cable saddle portal 1 in the tunnel anchor, 3 catwalk door frame guide wheel groups are arranged on the coaxial line, and the catwalk door frame guide wheel group is fixed on the tunnel anchor primary support arch ring section steel through the chain block 2; the puller 6 is arranged on the traction rope 5, and the traction rope 5 passes through the corresponding rotating wheels of the 3 conversion devices 10, bypasses the bottom guide wheel 11 and is connected to the horizontal guide wheel 8.
The construction method for realizing one-time traction of the anchor narrow space of the ultra-long tunnel by the main cable strand is realized in the following manner;
step one: arrangement of the traction system: the traction system mainly comprises the following components: the cable saddle support pier portal frame, tunnel anchor portal frame, tower top arc guide wheel set, traction winch (main and auxiliary), traction cable, puller, catwalk portal frame guide wheel set, supporting rollers at each part, related guide wheels and the like; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller to finally form a traction system;
step two: arrangement of the conversion means: the conversion device is arranged in a cable saddle dispersing portal frame in the tunnel anchor, 3 conversion devices are arranged on the coaxial line, and the conversion device is fixed on the primary arch ring section steel of the tunnel anchor through a chain block;
step three: the conversion operation method comprises the following steps:
(1) pulling the strand pulling rope before conversion; the main cable strand is pulled to the front end of the tunnel anchor and cable saddle by a conventional method and passes through a first conversion device, the process is to effectively raise the height of a pulling rope at the tunnel anchor and cable saddle, the pulling rope is required to be hung in the rotating wheel grooves of a second conversion device and a third conversion device, and the height of the pulling rope is controlled by a chain block;
(2) the first conversion device hangs the traction rope: when the main cable strand anchor head is pulled to approach the first conversion device, controlling and reducing the pulling speed, stopping pulling when the cable strand anchor head exceeds 50cm of the first conversion device, lowering a chain block at the first conversion device, hooking a block hook on the conversion device, hooking a pulling rope of a pulling system in a rotating wheel groove of the first conversion device, and slowly lifting the chain block due to the limitation of space height, so that the cable strand anchor head is lifted to a certain height without contacting with the ground;
(3) the second switching device is separated from the traction rope: continuing to pull the main cable strand, stopping pulling when the cable strand anchor head is 50cm away from the second conversion device, separating the second conversion device from the pulling rope, and continuing to pull to enable the cable strand anchor head to pull smoothly through the second conversion device;
(4) the second conversion device hangs the traction rope: when the cable strand anchor head passes through the second conversion device, traction is stopped, a traction rope is hung in a wheel groove of a rotating wheel of the second conversion device, the traction rope is lifted to the maximum height by using a chain block, and the main cable strand is continuously pulled;
(5) the third switching device is separated from the traction rope: when the cable strand anchor head is pulled to be 50cm away from the third conversion device, the first conversion device and the second conversion device are used as fulcrums, the third conversion device is separated from the pulling rope, and the pulling is continued;
(6) the third conversion device hangs the traction rope: after the cable strand anchor head passes through the third conversion device, if the traction cable strand is continuously contacted with the loose saddle pier cap concrete to generate friction so as to damage the main cable strand due to the limitation of space height, the traction is stopped just after the cable strand anchor head passes through the third conversion device, the traction rope is hung in a rotating wheel groove of the third conversion device, the main cable strand is lifted by using the chain block, and the main cable strand is continuously pulled in place once.
The invention has the advantages that:
1. the system not only can solve the difficult problem that the anchor cannot be pulled in place once in the narrow space of the ultra-long tunnel, but also can solve the effective conversion of different gradient and inclination conditions in the anchor of the ultra-long tunnel, and can be pulled in place once, thereby simplifying a plurality of complex links, improving the efficiency and ensuring the construction safety.
2. The system can be repeatedly and circularly utilized, the cost is low, and the operation is simple and the labor is saved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A construction system for realizing one-time traction of an ultra-long tunnel anchor narrow space by a main cable strand is characterized in that: the construction system is provided with a traction system and a conversion device;
the traction system structurally comprises a cable saddle portal (1), a chain block (2), a catwalk portal frame (3), catwalk portal frame guide wheel sets (4), a main traction winch, an auxiliary traction winch, a traction cable (5), a dragging device (6), catwalk bottom plate traction (7), horizontal guide wheels (8), an anchoring steel pipe (9), a conversion device (10), bottom guide wheels (11), a carrier roller, a tunnel anchor portal frame, a tower portal frame and a tower arc guide wheel set; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller (6) to finally form a traction system; the catwalk door frame guide wheel group (4) is arranged on the catwalk door frame (3), the horizontal guide wheel (8) is arranged on the anchoring steel pipe (9), the conversion device (10) is arranged in the scattered cable saddle door frame (1) in the tunnel anchor, 3 conversion devices (10) are arranged on the coaxial line, and the catwalk door frame guide wheel group is fixed on the tunnel anchor primary support arch ring section steel through the chain block (2); the puller (6) is arranged on the traction rope (5), and the traction rope (5) passes through the rotating wheels corresponding to the 3 conversion devices (10) and then bypasses the bottom guide wheel (11) to be connected to the horizontal guide wheel (8).
2. A construction method for realizing one-time traction of a main cable strand in an ultra-long tunnel anchor narrow space is characterized by comprising the following steps: the method is realized in the following manner;
step one: arrangement of the traction system: the traction system structure comprises the following components: the cable saddle portal frame (1), a chain block (2), a catwalk portal frame (3), a catwalk portal frame guide wheel set (4), a main traction winch, an auxiliary traction winch, a traction cable (5), a puller (6), a catwalk bottom plate traction (7), a horizontal guide wheel (8), an anchoring steel pipe (9), a conversion device (10), a bottom guide wheel (11), a carrier roller, a tunnel anchor portal frame, a tower top portal frame and a tower top arc guide wheel set; connecting traction ropes on the main traction winch and the auxiliary traction winch through a puller to finally form a traction system;
step two: arrangement of the conversion means: the conversion device is arranged in a cable saddle portal in the tunnel anchor, 3 conversion devices (10) are arranged on the coaxial line, and the conversion devices are fixed on the primary arch ring section steel of the tunnel anchor through a chain block;
step three: the conversion operation method comprises the following steps:
(1) pulling the strand pulling rope before conversion; the main cable strand is pulled to the front end of the tunnel anchor and cable saddle by a conventional method and passes through a first conversion device, the process is to effectively raise the height of a pulling rope at the tunnel anchor and cable saddle, the pulling rope is required to be hung in the rotating wheel grooves of a second conversion device and a third conversion device, and the height of the pulling rope is controlled by a chain block;
(2) the first conversion device hangs the traction rope: when the main cable strand anchor head is pulled to be close to the first conversion device, controlling and reducing the pulling speed, stopping pulling when the cable strand anchor head exceeds 50cm of the first conversion device, lowering a chain block at the first conversion device, hooking a block hook on the conversion device, hooking a pulling rope of a pulling system in a rotating wheel groove of the first conversion device, and lifting the chain block to ensure that the cable strand anchor head is lifted to a certain height without contacting with the ground;
(3) the second switching device is separated from the traction rope: continuing to pull the main cable strand, stopping pulling when the cable strand anchor head is 50cm away from the second conversion device, separating the second conversion device from the pulling rope, and continuing to pull to enable the cable strand anchor head to pull smoothly through the second conversion device;
(4) the second conversion device hangs the traction rope: when the cable strand anchor head passes through the second conversion device, traction is stopped, a traction rope is hung in a wheel groove of a rotating wheel of the second conversion device, the traction rope is lifted to the maximum height by using a chain block, and the main cable strand is continuously pulled;
(5) the third switching device is separated from the traction rope: when the cable strand anchor head is pulled to be 50cm away from the third conversion device, the first conversion device and the second conversion device are used as fulcrums, the third conversion device is separated from the pulling rope, and the pulling is continued;
(6) the third conversion device hangs the traction rope: after the cable strand anchor head passes through the third conversion device, if the traction cable strand is continuously contacted with the loose saddle pier cap concrete to generate friction so as to damage the main cable strand due to the limitation of space height, the traction is stopped just after the cable strand anchor head passes through the third conversion device, the traction rope is hung in a rotating wheel groove of the third conversion device, the main cable strand is lifted by using the chain block, and the main cable strand is continuously pulled in place once.
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| CN201910342163.0A CN109973130B (en) | 2019-04-26 | 2019-04-26 | Construction system and method for realizing one-time traction of extra-long tunnel anchor narrow space by main cable strand |
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| CN111877176B (en) * | 2020-07-31 | 2021-12-31 | 中交武汉港湾工程设计研究院有限公司 | Anchor structure for spreading anchor cable into anchor of guide tunnel and construction method |
| CN112176871B (en) * | 2020-09-15 | 2022-04-15 | 中交二公局第二工程有限公司 | Method for erecting suspension bridge main cable with tunnel type anchors at two sides |
| CN113830111B (en) * | 2021-10-30 | 2022-08-02 | 浙江天弘机器人科技有限公司 | Low-carbon cableway for power transmission line construction and working method thereof |
| CN114108480B (en) * | 2021-12-01 | 2023-05-26 | 中交第二航务工程局有限公司 | Suspension bridge catwalk full-section lower sliding frame arrangement structure and construction method thereof |
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