CN113216693A - Construction method for statically dismantling open cut tunnel of up-crossing railway business line - Google Patents
Construction method for statically dismantling open cut tunnel of up-crossing railway business line Download PDFInfo
- Publication number
- CN113216693A CN113216693A CN202110381647.3A CN202110381647A CN113216693A CN 113216693 A CN113216693 A CN 113216693A CN 202110381647 A CN202110381647 A CN 202110381647A CN 113216693 A CN113216693 A CN 113216693A
- Authority
- CN
- China
- Prior art keywords
- dismantling
- open cut
- cut tunnel
- arch
- arch ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to the technical field of railway construction, in particular to a construction method for statically dismantling an open cut tunnel of an up-span railway business line; the method comprises the following steps: (1) erecting protective shed frames on two sides of the door opening according to the structural form of the existing open cut tunnel; (2) removing the pavement layer and the retaining wall around the open cut tunnel; (3) placing a crane for dismantling the arch ring; (4) dismantling the main body and the arch ring of the open cut tunnel; (5) and (5) dismantling the arch wall and the side wall, and cleaning the side slope. The construction method reduces the influence of railway transportation to the minimum, adopts a static cutting method to remove the open cut tunnel, fully utilizes the construction of railway skylight points, and has less influence on the railway transportation. The open cut tunnel is removed by a static cutting method, the existing contact network wire is protected, existing equipment such as a contact network does not need to be moved and changed, the construction method is safe and reliable, and the practicability is high. The influence of dust, noise to nearby resident has been reduced, adopts static cutting method to demolish the open cut tunnel, and the job site does not have the dust influence basically, accords with the green construction that current building market advocated.
Description
Technical Field
The invention relates to the technical field of railway construction, in particular to a construction method for statically dismantling an open cut tunnel of an up-span railway business line.
Background
In recent years, with the rapid development of railway construction in China, single-track railway reconstruction energy-expanding projects originally built in the sixth and seventies of the last century are gradually increased, and in the process of reconstructing and expanding existing railways, construction of dismantling existing over-track open tunnels, over-track bridges and other structures is involved. When the over-span railway structure is dismantled, the traditional process adopts blasting or mechanical dismantling, the construction interruption railway transportation time is long, the existing equipment moving and modifying engineering quantity is large, the dust raising and vibration are large, and the influence on the surrounding environment is large.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a construction method for dismantling a clear tunnel of an up-span railway business line by static force.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a construction method for statically dismantling an open cut tunnel of an upper-span railway business line comprises the following steps:
(1) erecting protective shed frames on two sides of the door opening according to the structural form of the existing open cut tunnel;
(2) removing the pavement layer and the retaining wall around the open cut tunnel;
(3) placing a crane for dismantling the arch ring;
(4) dismantling the main body and the arch ring of the open cut tunnel: the main body of the open cut tunnel is dismantled and is all finished by adopting the static cutting of water drilling and rope saw, and after the cutting is blocked, the main body is abandoned except that the main body is hung by a crane, and the method specifically comprises the following steps:
the first step is as follows: drilling phi 100mm holes as cutting holes at 0.3m positions on two sides of the top of the cutting joint of the vertical open cut tunnel along the axis of the vertical open cut tunnel and at the arching lines on two sides, and simultaneously drilling phi 100mm holes as hoisting holes at 0.5m and 1.5m positions above the root of the arch crown and the arch ring on each side; the cutting holes and the hoisting holes are drilled in a row at intervals of 0.5m according to the weight of the arch ring;
the second step is that: cutting along the arch lifting line of the open cut tunnel, simultaneously cutting by three sets of cutting machines, binding the arch ring and the shed frame by using steel wires after the first piece is cut, binding the second piece and the previous piece later, and analogizing in sequence to ensure the stability of the second piece;
the third step: after the arch ring is completely cut, the protective shed frame on one side is firstly dismantled due to the influence of hoisting;
the fourth step: the method comprises the following steps that a plurality of sections are sequentially dismantled and cleared through arch top holes and 5 hoisting holes at positions 0.5m and 1.5m above the root of an arch ring, a dismantled main framework of a protective shed frame is used as an inner lining at the inner side of the arch ring during hoisting, and the integrity of the arch ring is ensured during hoisting;
the fifth step: dismantling the protective shed frame on the other side;
(5) and (5) dismantling the arch wall and the side wall, and cleaning the side slope.
Further, the protective shed frame in the step (1) is generally arranged in the form of a concrete strip foundation, a profile steel framework, a bamboo frame plate and an insulating plate; c30 concrete with the length of 5.5m, the width of 0.6m and the height of 0.6m is poured and formed to form steel plates with the thickness of 0.22m and the thickness of 10mm, 0.22 x 0.22m is embedded every 0.5m, anchoring steel bars with hooks phi 22 are welded at the lower parts of the steel plates, the length of the anchoring steel bars is 20cm and used as a main framework connecting foundation of the protective shed, after physical isolation is set, manual excavation is adopted for the strip foundation, excavation and pit detection are carried out before excavation to detect the trend of underground pipelines, and damage to existing cables is prevented;
protection canopy frame main skeleton design adopts the curved system of H120 shaped steel to form, and 0.5m equidistant arrangement, the bottom both ends of protection canopy frame main skeleton are fixed with the bar basis, and longitudinal connection member adopts 12# shaped steel between the steelframe, and hoop interval 1m welds with H120 shaped steel steelframe, lays the bamboo frame board between two shaped steel, and the insulation board is laid in the bamboo frame board outside, adopts 12# iron wire and steel material to be connected firmly.
The rope saw static cutting method for removing the existing open cut tunnel is a novel process adopted under the background of more existing line equipment, large moving and modifying amount of engineering, high cost and long period. After the protection of various equipment of the existing line is finished, the integral structure is gradually divided into small blocks by adopting a method of water mill drilling and rope saw cutting, and then the whole structure is gradually dismantled by hoisting through a crane. The whole dismantling work can be divided into dismantling of a plurality of skylight points, and the influence on existing line transportation is small.
Further, the step (2) of removing the paving layer and the retaining wall around the open cut tunnel comprises the following specific steps:
the first step is as follows: removing the anti-collision degree and anti-throwing net adjacently; arranging a cable rope when the anti-throwing net is dismantled; the anti-collision pier is symmetrically disassembled left, right, front and back when the anti-collision pier is disassembled;
the second step is that: dismantling a rubble end wall at the upper part of the vault; manually cooperating with a gun hammer to break the pavement layer by layer, wherein each layer is no more than 20cm, and the earthwork vehicle is abandoned to an appointed place and divided into 3-4 layers;
the third step: removing the arch side wall and the front and rear retaining walls of the bridge; and (4) in the process of dismantling, the dismantling is carried out in a layered and symmetrical manner, and the dismantling height of each layer is not more than 1 m. The concrete structure is demolished by manually utilizing a small air compressor with a hand-held impact pneumatic pick to be matched with a small breaking hammer; the discarded slag is transported to a designated place by adopting a manual matching dump truck;
the left and right vertical walls are dug and transported to the bottom of the arch ring synchronously, the rope saw cutting platform is made, and the arch ring can be dismantled.
Compared with the prior art, the invention has the following beneficial effects:
the construction method reduces the influence of railway transportation to the minimum, adopts a static cutting method to remove the open cut tunnel, fully utilizes the construction of railway skylight points, and has less influence on the railway transportation.
The open cut tunnel is removed by a static cutting method, the existing contact network wire is protected, existing equipment such as a contact network does not need to be moved and changed, the construction method is safe and reliable, and the practicability is high.
The influence of dust, noise to nearby resident has been reduced, adopts static cutting method to demolish the open cut tunnel, and the job site does not have the dust influence basically, accords with the green construction that current building market advocated.
Drawings
Fig. 1 is a plan view of an existing open cut hole in example 1.
Fig. 2 is a view a-a of fig. 1.
Fig. 3 is a view B-B of fig. 1.
Fig. 4 is a schematic view of a crane station according to embodiment 1.
Fig. 5 is a schematic view of the arrangement of the cutting holes and the hoisting holes along the open cut tunnel in embodiment 1.
Fig. 6 is a schematic view of the second wire saw cutting step for dismantling the arch ring of the open cut tunnel in the embodiment 1.
FIG. 7 is a schematic view of the binding of open cut tunnel arch wire in example 1.
The figures are labeled as follows:
1-contact net rod, 2-building steel pipe bamboo bent frame physical isolation protection at a toe line, 3-protection shed frame, 4-existing overpass, 5-existing Yangan line, 6-Yangan line, 7-crane, 8-arch ring, 9-H120 section steel, 10-movable trolley, 11-cutting hole, 12-lifting hole, 13-first set of diamond rope saw, 14-second set of diamond rope saw, 15-third set of diamond rope saw and 16-iron wire binding position.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
The existing railway K322+505 open cut tunnel demolition engineering of the Yang 'an second line has the defects that the railway and the place are greatly influenced by blasting demolition or mechanical demolition because the existing Yang' an line is operating the railway and the open cut tunnel is located in the central zone of the village, and the economic and environmental protection benefits of construction units and places are not met. The Yangan project department compares and summarizes actual operation through a construction process, improves and innovates the previous construction experience, removes the open cut tunnel by adopting a static cutting method, has small construction safety risk, firstly reduces the influence of railway transportation to the minimum, secondly reduces the influence of raised dust and noise on nearby residents, and obtains good economic benefit and social benefit.
The open cut tunnel of the Sanremo is positioned on a Yandan K322+505, is orthogonal to a business line, is positioned between a plum berth and a Jian pond berth area, is 1000m away from a throat on the east of the plum berth station, and needs to be dismantled due to the requirement of newly building a second line, and a (16-20-16) m-hole hollow plate girder overpass bridge is newly built at the K322+460 position. The existing open cut tunnel has the total length of 26.4m and the width of 10.15m, and the structural form is a 1-hole concrete structural arch bridge. The bridge is designed for the interchange of the original national road and the railway, the clear width of the bridge surface road is 8.15m, and anti-collision railings and anti-throwing nets are arranged on two sides of the bridge. The distance from the road surface to the vault is 80 cm. The arch ring thickness is 60cm, the net rise is 2.8m, the net span is 5.6m, the distance of the inner arc of the arch top is 7.5m from the existing railway track top, the distance from the inner arc of the arch top to the contact network cable is 0.85m, and a return line is hung at the arch foot of the right arch ring. As shown in fig. 1-3.
The main body of the open cut tunnel in the Sanremo village is of a concrete structure, stored files are checked, actual field investigation is conducted, the main body is of a plain concrete structure, an upper-span railway is an electrified railway, the arc distance between the inner arch top of the open cut tunnel and a contact net is about 0.85m, and the existing solar security line needs to be operated normally when the open cut tunnel is dismantled.
If the open cut tunnel is dismantled by power, the protection difficulty of the existing equipment for contacting the network cable is high, the normal operation of the existing railway is greatly influenced, and the open cut tunnel is not dismantled by power crushing under the field condition. In order to ensure the normal operation of a business line and protect the existing equipment, a rope saw static cutting method is adopted for construction, two sides of the top of a cutting seam perpendicular to the axis of the open cut tunnel and two side arching line positions are drilled to be used as cutting holes, meanwhile, holes are drilled at the root parts of the arch crown and the arch ring at each side to be used as hoisting holes, the skylight is drilled to 50cm in front, 10cm is reserved, and the inside of the skylight is drilled. According to the weight of the arch ring, holes are drilled in a row at intervals of 0.5m, then a rope saw cutting machine is used for cutting from the top to two sides, after the first piece is cut, the arch ring and the shed frame are bound through steel wires, the second piece is bound with the previous piece later, and the rest is done in sequence to ensure the stability of the arch ring.
The construction method is adopted to carry out static dismantling of the open cut tunnel crossing the railway business line in the Yangtian line K322+505 village open cut tunnels. The specific steps and flows are as follows:
1. open cut tunnel dismantling construction process
And (3) performing field investigation, determining equipment, pipelines and pipelines influenced on the site → changing the influenced equipment → pouring a protective shed frame foundation in a point and an embedded steel plate → installing and welding the protective shed frame in the point, erecting a surface layer bamboo bent frame → dismantling the side wall above an arch ring of the open cut tunnel outside the point → drilling a rope saw cutting hole and a lifting hole outside the point (the outer part of the point is not penetrated and the inner part of the point), transversely cutting the arch ring by the rope saw in the point → hoisting the cutting block in the point to go out a railway limit → sequentially cutting and hoisting all the arch rings → dismantling the side wall and cleaning the side slope.
2. Building protective shed frame
According to the structural form of the existing open cut tunnel, 5m long protective shed frames are erected on two sides of a door opening for dismantling auxiliary construction, and the protective shed frames are integrally arranged in the form of a concrete strip foundation, a profile steel framework, a bamboo frame plate and an insulating plate.
The strip foundation is formed by casting C30 concrete with the length of 5.5m, the width of 0.6m and the height of 0.6m into steel plates with the thickness of 10mm and the embedded speed of 0.22 x 0.22m every 0.5m, the lower parts of the steel plates are welded with anchoring steel bars with hooks phi 22, and the length of the anchoring steel bars is 20cm and is used as a main framework connecting foundation of the protective shed frame. After physical isolation is established, manual excavation is adopted for strip foundation excavation, and the underground pipeline trend is explored by excavating exploratory pits before excavation, so that damage to existing cables is prevented. The C30 concrete pouring is carried out by manual pouring.
The protective shed frame main framework is designed by bending H120 section steel to form an arch, the H120 section steel is arranged at equal intervals of 0.5m to form 22 frames, longitudinal connecting rod pieces between steel frames are made of 12 section steel, the annular interval is 1m, the longitudinal connecting rod pieces are welded with the H120 section steel frames, a panel (a bamboo frame plate) is laid between the two section steel, and the 12# iron wire is connected with the steel material stably.
3. Paving layer and retaining wall removal
The layer of mating formation contains crashproof mound, prevents throwing net and vault upper portion slabstone headwall
The first step is as follows: and (5) removing the anti-collision degree and the anti-throwing net adjacent to the net. Arranging a cable rope when the anti-throwing net is dismantled; when the anti-collision pier is disassembled, the anti-collision pier is symmetrically disassembled left, right, front and back.
The second step is that: dismantling a rubble end wall at the upper part of the vault; the pavement is broken layer by manually matching with the cannon hammer, each layer is not more than 20cm, the earthwork vehicle is abandoned to an appointed place and is finished by 3-4 layers.
The third step: removing the arch side wall and the front and rear retaining walls of the bridge; when the device is disassembled, layered symmetrical disassembly is carried out, and the disassembly height of each layer is not more than 1 m. The concrete structure is demolished by manually utilizing a hand-held impact pneumatic pick matched with a small breaking hammer by a small air compressor. The abandoned ballast is transported to a designated place by adopting a manual matching dump truck.
The vertical walls at the left and right ends are dug and transported to the bottom of the arch ring synchronously, a rope saw cutting platform is made, and the arch ring can be dismantled; and after the arch ring is cut, the retaining wall is integrally removed.
4. The placing position and the configuration requirement of an arch ring dismantling crane
As the arch ring hoisting single piece is hoisted to be 0.5m wide, the hoisting weight is 9t, the working radius of the crane is 8.5m, the elevation angle is 45 degrees, the arm length is 12m, 80 tons of slow-moving cranes are selected, and the placing position of the cranes is schematically shown in figure 4.
5. Open cut tunnel main body dismantling mode
The main body of the open cut tunnel is dismantled and composed of two parts, namely an arch ring and a right side arch wall. And the main body of the open cut tunnel is dismantled by adopting the static cutting of a water drill drilling and a rope saw, and is abandoned after being cut into blocks and hung by a crane.
The main body of the open cut tunnel is plain concrete without steel bars through field investigation, only the arch ring is cut when the rope saw cuts, the root of the arch ring and the joint of the arch wall are drilled with a water drill with the diameter of 100mm for 2 holes (the total of 80 drill holes are drilled, and the holes are directly drilled outside the points), the arch wall is directly hoisted by a crane without cutting, the arch wall on the left side of the line is not dismantled to be used as a retaining wall for construction, the arch wall on the right side of the line is directly pushed down in the skylight point by an excavator, and the arch wall is mechanically cleared and transported out of the field.
5.1 open cut hole cutting area calculation
(1) Area of arch ring section: 3.14 x (3.42-2.82)/2 =5.84 square meter
Volume of the arch ring: 5.84 × 10.15=59.28m3
Total weight of arch ring: 59.28 × 2.5=148.2t
The open cut tunnel width is 10.15m, the arch ring is cut into 20 blocks (17 blocks are 0.5m wide and 3 blocks are 0.55m wide) in 19 times, the number of 0.5m blocks is about 7.3t, the number of 0.55 blocks is about 8.03t, and a crane hoisting scheme is adopted.
Adopting an 80-degree crane, wherein the turning radius is 8.5m, the arm length is 12m, the hoisting height is 8.5m, the rated hoisting capacity is 43.5t according to table lookup, and the hoisting safety coefficient =43.5/8.03=5.42
The cross-sectional area of each unit is 5.84 square meters
The total area of arch ring cut is 5.84 × 19=110.96 square meters
5.2, steel wire rope checking and calculating
(1) Calculating the length of the cargo boom, wherein l is more than or equal to l in an r/sin alpha formula, namely the length (m) of the cargo boom; r is the working radius of the crane, and the project takes 8.5 m; alpha-elevation angle of the crane arm, the project is 45 degrees. l is more than or equal to 8.5/sin (45 degrees) and =12.02 meters.
(2) The working range of the crane is comprehensively considered, an 80t truck crane is selected by referring to a crane performance parameter table, the minimum lifting capacity is 20.8t, and the construction requirement is met.
(3) Wire rope selection
Q = Q1+ Q2= (8.3+9.42 × 14 × 10-3) =8.43t, calculated as 9 t.
S=Q/(n*sinβ)=4.5*10/(1*sin60°)=51.963KN
Pp=S·K＝51.963×6=311.78KN
Selecting the steel wire ropes with the diameter of 24 mm, the model number of 6 x 37 and the nominal tensile strength of 1850MPa, wherein the total breaking force of the steel wire ropes is 390109.5N, and considering the load non-uniformity coefficient between the steel wire ropes of 0.82, the total breaking force of the steel wire ropes is 319889.8N =319.89KN which is more than or equal to 311.78 KN. In the above formula:
q: expressed as weight, 9 tons;
s: representing the single strand load bearing n of the lifting rope: the number of the lifting rope strands is expressed (1 rope);
pp: representing the breaking force of a single strand of the hoist rope;
k: representing the set safety factor, checking a hardware manual, and taking 6;
beta: the horizontal angle of the steel wire rope is generally between 40 and 70 degrees, and is 60 degrees. The bearing capacity of the treated subgrade foundation is required to be more than 150 KPa.
6. Open cut tunnel main body and arch ring dismantling step
Concrete dismantling process
The first step is as follows: drilling phi 100mm holes as cutting holes at 0.3m positions on two sides of the top of a cutting seam perpendicular to the axis of the open cut tunnel and at two arching lines, drilling phi 100mm holes at 0.5m positions and 1.5m positions of the arch crown and the root of each side of an arch ring upwards as hoisting holes, and drilling to 50cm positions before a locking point (namely when the railway is still in an operation state), reserving 10cm, and opening the inside of the locking point (the railway is locked) as shown in figure 5.
The second step is that: cutting along the arch-forming line of the unit segment, simultaneously cutting by three sets of cutting machines, binding the arch ring and the shed frame with steel wires after the first piece is cut, binding the second piece with the previous piece later, and analogizing in sequence to ensure the stability of the arch ring and the shed frame. As shown in fig. 6 and 7.
The third step: after the arch ring is completely cut, the protective shed frame on one side is firstly dismantled due to the influence of hoisting.
The fourth step: 20 segments are sequentially removed and cleared through arch top holes and 5 lifting holes at the positions of 0.5m and 1.5m above the root of the arch ring, the removed H120 section steel (namely, a main framework of the protective shed frame) is used as a lining at the inner side of the arch ring during lifting, and the integrity of the arch ring is ensured during lifting.
The fifth step: and (5) detaching the protective shed frame on the other side.
Claims (3)
1. A construction method for statically dismantling an open cut tunnel of an up-span railway business line is characterized by comprising the following steps:
(1) erecting protective shed frames on two sides of the door opening according to the structural form of the existing open cut tunnel;
(2) removing the pavement layer and the retaining wall around the open cut tunnel;
(3) placing a crane for dismantling the arch ring;
(4) dismantling the main body and the arch ring of the open cut tunnel: the main body of the open cut tunnel is dismantled and is all finished by adopting the static cutting of water drilling and rope saw, and after the cutting is blocked, the main body is abandoned except that the main body is hung by a crane, and the method specifically comprises the following steps:
the first step is as follows: drilling phi 100mm holes as cutting holes at 0.3m positions on two sides of the top of the cutting joint of the vertical open cut tunnel along the axis of the vertical open cut tunnel and at the arching lines on two sides, and simultaneously drilling phi 100mm holes as hoisting holes at 0.5m and 1.5m positions above the root of the arch crown and the arch ring on each side; the cutting holes and the hoisting holes are drilled in a row at intervals of 0.5m according to the weight of the arch ring;
the second step is that: cutting along the arch lifting line of the open cut tunnel, simultaneously cutting by three sets of cutting machines, binding the arch ring and the shed frame by using steel wires after the first piece is cut, binding the second piece and the previous piece later, and analogizing in sequence to ensure the stability of the second piece;
the third step: after the arch ring is completely cut, the protective shed frame on one side is firstly dismantled due to the influence of hoisting;
the fourth step: the method comprises the following steps that a plurality of sections are sequentially dismantled and cleared through arch top holes and 5 hoisting holes at positions 0.5m and 1.5m above the root of an arch ring, a dismantled main framework of a protective shed frame is used as an inner lining at the inner side of the arch ring during hoisting, and the integrity of the arch ring is ensured during hoisting;
the fifth step: dismantling the protective shed frame on the other side;
(5) and (5) dismantling the arch wall and the side wall, and cleaning the side slope.
2. A static force construction method for dismantling a clear tunnel across a railway business line according to claim 1, wherein the protective shed frames in the step (1) are arranged in the form of a concrete strip foundation, a steel skeleton, a bamboo frame plate and an insulating plate; c30 concrete with the length of 5.5m, the width of 0.6m and the height of 0.6m is poured and formed to form steel plates with the thickness of 0.22m and the thickness of 10mm, 0.22 x 0.22m is embedded every 0.5m, anchoring steel bars with hooks phi 22 are welded at the lower parts of the steel plates, the length of the anchoring steel bars is 20cm and used as a main framework connecting foundation of the protective shed, after physical isolation is set, manual excavation is adopted for the strip foundation, excavation and pit detection are carried out before excavation to detect the trend of underground pipelines, and damage to existing cables is prevented;
protection canopy frame main skeleton design adopts the curved system of H120 shaped steel to form, and 0.5m equidistant arrangement, the bottom both ends of protection canopy frame main skeleton are fixed with the bar basis, and longitudinal connection member adopts 12# shaped steel between the steelframe, and hoop interval 1m welds with H120 shaped steel steelframe, lays the bamboo frame board between two shaped steel, and the insulation board is laid in the bamboo frame board outside, adopts 12# iron wire and steel material to be connected firmly.
3. The static dismantling construction method of the open cut tunnel of the railway business line on the upper cross of the railway according to the claim 1, wherein the concrete steps of dismantling the paving layer and the retaining wall around the open cut tunnel in the step (2) are as follows:
the first step is as follows: removing the anti-collision degree and anti-throwing net adjacently; arranging a cable rope when the anti-throwing net is dismantled; the anti-collision pier is symmetrically disassembled left, right, front and back when the anti-collision pier is disassembled;
the second step is that: dismantling a rubble end wall at the upper part of the vault; manually cooperating with a gun hammer to break the pavement layer by layer, wherein each layer is no more than 20cm, and the earthwork vehicle is abandoned to an appointed place and divided into 3-4 layers;
the third step: removing the arch side wall and the front and rear retaining walls of the bridge; when in dismantling, the dismantling is layered and symmetrical, the dismantling height of each layer is not more than 1m,
the concrete structure is demolished by manually utilizing a small air compressor with a hand-held impact pneumatic pick to be matched with a small breaking hammer; the discarded slag is transported to a designated place by adopting a manual matching dump truck; the left and right vertical walls are dug and transported to the bottom of the arch ring synchronously, the rope saw cutting platform is made, and the arch ring can be dismantled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110381647.3A CN113216693A (en) | 2021-04-09 | 2021-04-09 | Construction method for statically dismantling open cut tunnel of up-crossing railway business line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110381647.3A CN113216693A (en) | 2021-04-09 | 2021-04-09 | Construction method for statically dismantling open cut tunnel of up-crossing railway business line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113216693A true CN113216693A (en) | 2021-08-06 |
Family
ID=77086829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110381647.3A Pending CN113216693A (en) | 2021-04-09 | 2021-04-09 | Construction method for statically dismantling open cut tunnel of up-crossing railway business line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113216693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059044A (en) * | 2022-08-01 | 2022-09-16 | 无锡同济工程质量检测有限公司 | Static sounding vehicle |
-
2021
- 2021-04-09 CN CN202110381647.3A patent/CN113216693A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059044A (en) * | 2022-08-01 | 2022-09-16 | 无锡同济工程质量检测有限公司 | Static sounding vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101265690B (en) | Method for protectively dismantling arch bridge | |
| CN109680716B (en) | Method for double in-situ protection of electric power culvert by adopting upper suspension and lower support | |
| CN106979021B (en) | Large-section loess tunnel excavates and preliminary bracing quick closure cyclization method | |
| CN110904867B (en) | Construction method for dismantling upper-span existing line arch bridge | |
| CN111155451A (en) | Method for dismantling highway-span iron bridge | |
| CN111173027A (en) | Construction method for reinforcing and protecting existing pipeline | |
| CN113235467A (en) | Construction method for dismantling large-span prestressed cast-in-place box girder | |
| CN109629576B (en) | Suspension protection system for water supply pipe crossing foundation pit and construction method | |
| CN102425422B (en) | Method for constructing cross-over chambers with full-coal outsize cross section under host lane ceaseless transportation condition | |
| CN110863498A (en) | Deep foundation pit combined supporting construction method next to subway station | |
| CN113482044B (en) | Power pipeline relocation method for invading subway station structure | |
| CN110043269A (en) | A kind of excavation construction process of freeway tunnel barrel | |
| CN110552296A (en) | Cable-stayed bridge dismantling construction method | |
| CN110158609A (en) | A kind of mechanization demolition reduction method of reinforced concrete brace in foundation pit | |
| WO2023020159A1 (en) | Side slope emergency rescue support apparatus and support method | |
| CN114892552A (en) | Box girder type bridge reconstruction construction method | |
| CN113216693A (en) | Construction method for statically dismantling open cut tunnel of up-crossing railway business line | |
| CN112727470B (en) | Construction reinforcing method for shield tunnel at overlapped section | |
| CN114808774B (en) | Method for dismantling upper span bridge girder | |
| CN114109416B (en) | Method for replacing TBM main bearing in tunnel | |
| CN111997043A (en) | Segmented reinforcement cage and diaphragm wall construction method under low-clearance high-voltage line | |
| CN218031749U (en) | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system | |
| CN107653787A (en) | It is a kind of to protect the construction method across the underground high voltage cable box culvert of foundation ditch | |
| CN113339003A (en) | Construction method of tunnel integrated arch sheathing trolley | |
| CN107587528B (en) | It is a kind of to protect the design and construction method across the underground high voltage cable box culvert of foundation pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |