CN111058458A - Construction method and structure based on cutter suction type ground connecting wall local replacement row pile support - Google Patents
Construction method and structure based on cutter suction type ground connecting wall local replacement row pile support Download PDFInfo
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- CN111058458A CN111058458A CN201911338252.4A CN201911338252A CN111058458A CN 111058458 A CN111058458 A CN 111058458A CN 201911338252 A CN201911338252 A CN 201911338252A CN 111058458 A CN111058458 A CN 111058458A
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- pipeline
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- reinforcement cage
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- shaped steel
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- 238000010276 construction Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 230000002787 reinforcement Effects 0.000 claims abstract description 46
- 239000000725 suspension Substances 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 15
- 210000001503 joint Anatomy 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 2
- 230000009189 diving Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
Abstract
The invention relates to a construction method and a structure for supporting by partially replacing row piles based on a cutter-suction type ground connecting wall, which comprises a pipeline suspension protection structure and a pipeline external reinforcement cage; the pipeline suspension protection structure comprises lattice columns on two transverse sides of a pipeline, a transverse I-shaped steel platform is arranged at the top of each lattice column, a longitudinal steel truss is arranged above each I-shaped steel platform, upper I-shaped steels which are arranged in parallel along the longitudinal direction are arranged above each steel truss, lower I-shaped steels which are positioned below the pipeline are suspended on two transverse sides of the upper I-shaped steel through a chain block, and the pipeline is positioned above the lower I-shaped steel. The invention partially replaces row pile support, suspends the pipeline through a steel truss, forms a groove by a submersible drilling gas lift reverse circulation, processes a steel reinforcement cage in two sections, then butts in a male-female mode, pours concrete to form a wall, thereby achieving the purpose that the foundation pit at the position where the pipeline can not be moved in a busy road section in the city can be normally closed.
Description
Technical Field
The invention belongs to the technical field of foundation pit engineering, and particularly relates to a construction method and a structure based on a cutter-suction type diaphragm wall local replacement row pile support.
Background
Subway construction is often in the busy highway section in city, and peripheral pipeline is numerous, and most pipeline can move temporarily or permanently to change to the subway construction influence scope outside, but also some important pipeline often can't move and change (like 220KV electric power pipe ditch) to pipeline diameter or width are great, and under this condition, ordinary row stake pore-forming or ground wall grooving equipment meets the pipeline that can't move and change, causes unable closed foundation ditch.
Disclosure of Invention
The invention aims to provide a construction method and a structure for partially replacing a row pile support based on a cutter-suction type ground connecting wall, wherein the row pile support is partially replaced, a pipeline is suspended through a steel truss, a submersible drill gas lift reverse circulation is adopted to form a groove, a steel reinforcement cage is processed in two sections and then is butted in a male-female mode, and concrete is poured to form a wall, so that the aim that a foundation pit at the position where the pipeline cannot be moved and changed in a busy road section in the city can be normally closed is fulfilled.
The technical scheme adopted by the invention is as follows:
based on construction structures that formula ground is wall local substitution row pile was strutted even to cutter-suction type, its characterized in that:
the device comprises a pipeline suspension protection structure and a pipeline external reinforcement cage;
the pipeline suspension protection structure comprises lattice columns on two transverse sides of a pipeline, a transverse I-shaped steel platform is arranged at the top of each lattice column, a longitudinal steel truss is arranged above each I-shaped steel platform, upper I-shaped steels arranged in parallel along the longitudinal direction are arranged above each steel truss, lower I-shaped steels located below the pipeline are suspended on two transverse sides of the upper I-shaped steel through a chain block upper hanging piece, a chain block and a chain block lower hanging piece, and the pipeline is located above the lower I-shaped steel.
The outer reinforcement cage of pipeline includes left side reinforcement cage and the right side reinforcement cage of the horizontal both sides of pipeline, merges the butt joint to the pipeline center.
The two end parts of the steel truss are fixed on the hardened ground, the middle of the steel truss is fixed at the top of the I-shaped steel platform, and the hardened ground and the top of the I-shaped steel platform are located at the same elevation.
The two ends of a steel truss are fixed on a hardened ground, after the middle of the steel truss is fixed on the top of an I-shaped steel platform, hanging parts on inverted chains are hung on the two transverse sides of the I-shaped steel respectively, the inverted chains penetrate through inverted chain holes of the hanging parts, after soil bodies are excavated downwards from the ground to the top of a pipeline and covered soil on the two sides of the pipeline is removed, a narrow soil groove is excavated at the bottom of the pipeline and penetrates through I-shaped steel, the inverted chain hanging parts are installed on the two transverse sides of the I-shaped steel at the moment, the inverted chains penetrate through the inverted chain holes of the inverted chain hanging parts, the inverted chains are closed, the I-shaped steel is leveled to the same elevation by the inverted chains, the suspension protection work of the pipeline is finished, and after the.
A construction method based on a cutter-suction type ground connecting wall local replacement row pile support is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps: firstly, completing a pipeline suspension protection structure which cannot be changed, firstly constructing a lattice column, transversely placing an I-shaped steel platform on the top of the lattice column, erecting a steel truss on the upper part of the I-shaped steel platform, and connecting upper I-shaped steel and lower I-shaped steel of the steel truss through a chain block upper hanging piece, a chain block and a chain block lower hanging piece to form a suspension protection structure to suspend a pipeline to be protected;
step two: grabbing a leading guide groove with the length of 2m and the width of 0.8m at two sides of the pipeline for suspension protection by using a hydraulic grab; after the first guide groove is finished, the submersible drill is put in place, the guniting guide pipe is inserted into the first guide groove, the submersible drill is driven to drill a soil body which cannot be grabbed by the hydraulic grab below the pipeline downwards along the guniting guide pipe, a drill bit cuts mud blocks to fall into the bottom of the groove in the drilling process, and the residue soil is discharged into a ground residue hopper along with slurry through the guniting guide pipe by utilizing an air-lift reverse circulation air column formed by an air pipe;
step three: processing and hoisting of reinforcement cage
Processing the reinforcement cage into two parts, namely a left reinforcement cage and a right reinforcement cage, by taking the center of a steel truss of a pipeline which cannot be moved and changed and needs to be suspended and protected as a boundary, wherein the two parts adopt a male-female butt joint mode; after the reinforcement cage is processed, the left reinforcement cage and the right reinforcement cage are respectively hung from the two sides of the steel truss and move to the center of the suspended and protected pipeline, when the upper parts of the two cages are all hung in place, then each cage is hung at the side hanging point of the suspended and protected pipeline at the same time, and the cages are lifted up and down back and forth, so that the two cages are fully combined into a whole, and the integral reinforcement cage is formed.
Step four: pouring concrete into wall
And pouring concrete to form the underground diaphragm wall, and finishing foundation pit sealing.
In the second step, when the grooving finishes drilling, the diving drill is lifted, so that the drill bit is close to the position below the steel truss and is higher than the un-drilled soil surface; and simultaneously lifting the jet guide pipe to be 50-100 cm away from the bottom surface of the groove, moving the groove frame backwards to prepare for next drilling construction, overlapping 1/3 drill bit diameters at the front and back drilling positions, controlling the horizontal footage within 20cm each time according to stratum characteristics, drilling from one end of the unit groove section to the direction of the suspension frame until the grooving drilling at one side of the suspension frame is completed, and then constructing the other side, and completing 5-6 drills at least at one side until the grooving construction of the whole groove section is completed.
The invention has the following advantages:
the invention provides a novel design concept, enriches the existing hole forming (grooving) process, widens the design idea of foundation pit closure, has higher economic benefit and social benefit, and has wide application prospect in engineering foundation pits of urban rail transit, railways, highways and the like.
Drawings
FIG. 1 is a schematic longitudinal section of a pipeline suspension.
Figure 2 is a schematic cross-sectional view of a pipeline suspension.
Fig. 3 is a cross-sectional view of the chain hoist.
Fig. 4 is a schematic diagram of a drill work track.
Fig. 5 is a schematic diagram of the construction of a submerged drill grooving.
Fig. 6 is a schematic diagram of reinforcement cage docking.
In the figure, 1-steel truss, 2-lattice column, 3-I-steel platform, 4-pipeline, 5-lower I-steel, 6-upper I-steel, 7-inverted chain, 8-inverted chain upper hanger, 9-inverted chain lower hanger, 10-hardened ground, 11-guide wall, 12-auxiliary wall, 13-working track, 14-guniting guide pipe, 15-pilot guide groove, 16-submerged drill, 17-air pipe, 18-left reinforcement cage, 19-right reinforcement cage, 20-integral reinforcement cage and 21-ground connecting wall.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to a construction structure based on a cutter-suction type ground connecting wall local replacement row pile support, which comprises a pipeline suspension protection structure and a pipeline external reinforcement cage. The pipeline suspension protection structure comprises lattice columns 2 on two transverse sides of a pipeline 4, a transverse I-shaped steel platform 3 is arranged at the top of each lattice column 2, a longitudinal steel truss 1 is arranged above each I-shaped steel platform 3, upper I-shaped steels 6 arranged in parallel along the longitudinal direction are arranged above each steel truss 1, lower I-shaped steels 5 located below the pipeline 4 are suspended on two transverse sides of the upper I-shaped steels 6 through inverted chain upper hanging pieces 8, inverted chains 7 and inverted chain lower hanging pieces 9, and the pipeline 4 is located above the lower I-shaped steels 5. The external reinforcement cage of the pipeline comprises a left reinforcement cage 18 and a right reinforcement cage 19 on the two transverse sides of the pipeline 4, and the left reinforcement cage and the right reinforcement cage are merged and butted towards the center of the pipeline 4.
The two ends of a steel truss 1 are fixed on a hardened ground 8, after the middle of the steel truss 1 is fixed on the top of an I-steel platform 3, two sides of the transverse direction of an I-steel 6 are respectively hung with a chain block upper hanging piece 8, a chain block passes through a chain block hole of the upper hanging piece 8, after soil is excavated downwards from the ground to the top and two sides of a pipeline 4 are removed, a narrow soil groove is dug at the bottom of the pipeline 4 to pass through a lower I-steel 5, the chain block lower hanging pieces 9 are installed at two sides of the transverse direction of the lower I-steel 5, then the chain block 7 passes through the chain block hole of the chain block lower hanging piece 8, the chain block is closed, the lower I-steel 5 is leveled to the same elevation by using the chain block, the suspension protection work of the pipeline 4 is finished, and the downward.
The construction method based on the cutter-suction type ground connecting wall local replacement row pile supporting is realized by four steps of pipeline suspension protection structure, grooving, reinforcement cage processing and hoisting, and concrete pouring to form the wall, and specifically comprises the following steps:
the method comprises the following steps: the pipeline suspension protection structure which cannot be changed is completed firstly, a lattice column 2 is constructed firstly, an I-shaped steel platform 3 is transversely placed at the top of the lattice column 2, a steel truss 1 is erected on the upper portion of the I-shaped steel platform 3, and an upper I-shaped steel 6 above the steel truss 1 and a lower I-shaped steel 5 below the steel truss are connected through a chain block upper hanging piece 8, a chain block 7 and a chain block lower hanging piece 9 to form a suspension protection structure to suspend a pipeline 4 to be protected.
Step two: the construction guide wall 9 is below the pipeline 4, the masonry auxiliary wall 12 is higher than the steel truss 1, the working rail 13 is fixed on the auxiliary wall 12, and the grooving drilling machine can move back and forth by using the working rail 15 during working. Grabbing a 2m long and 0.8m wide advance guide groove 15 at two sides of the suspension protected pipeline 4 by using a hydraulic grab; after the first guide groove 15 is finished, the underwater drill 16 is in place, the guniting guide pipe 14 is inserted into the first guide groove 15, the underwater drill 16 is enabled to move downwards along the guniting guide pipe 14 to a soil body which cannot be grabbed by a hydraulic grab below a drilling pipeline, a drill bit cuts mud blocks to fall into the bottom of a groove in the drilling process, and the residue soil is discharged into a ground residue bucket along with slurry through the guniting guide pipe 14 by utilizing a gas lift reverse circulation gas column formed by a gas pipe 17;
when the grooving is completed, the underwater drill 16 is lifted so that the drill bit is close to the position below the steel truss 1 and above the un-drilled soil surface; and simultaneously lifting the jet guide pipe to be 50-100 cm away from the bottom surface of the groove, moving the groove frame backwards to prepare for next drilling construction, overlapping 1/3 drill bit diameters at the front and back drilling positions, controlling the horizontal footage within 20cm each time according to stratum characteristics, drilling from one end of the unit groove section to the direction of the suspension frame until the grooving drilling at one side of the suspension frame is completed, and then constructing the other side, and completing 5-6 drills at least at one side until the grooving construction of the whole groove section is completed. The guide wall is L-shaped from the ground downwards and is positioned perpendicular to the pipeline, and the position can be seen on the longitudinal section.
Step three: processing and hoisting of reinforcement cage
Processing the reinforcement cage into two parts, namely a left reinforcement cage 18 and a right reinforcement cage 19, by taking the center of the steel truss 1 of the pipeline which cannot be moved and needs to be suspended and protected as a boundary, wherein the two parts adopt a male-female butt joint mode; after the reinforcement cage is processed, the left reinforcement cage 18 and the right reinforcement cage 19 are respectively hung from two sides of the steel truss 1 and move to the center of the suspended and protected pipeline 4, when the upper parts of the two cages are all hung in place, then each cage is hung at a hanging point close to the suspended and protected pipeline 4, and the cages are lifted up and down back and forth, so that the two cages are fully combined into a whole, and the integral reinforcement cage 20 is formed.
Step four: pouring concrete into wall
And pouring concrete to form the underground diaphragm wall 21 to finish foundation pit sealing.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (6)
1. Based on construction structures that formula ground is wall local substitution row pile was strutted even to cutter-suction type, its characterized in that:
the device comprises a pipeline suspension protection structure and a pipeline external reinforcement cage;
the pipeline suspends protection architecture in midair includes lattice column (2) of pipeline (4) horizontal both sides, lattice column (2) top sets up horizontal I-steel platform (3), I-steel platform (3) top sets up fore-and-aft steel truss (1), steel truss (1) top sets up along vertical parallel arrangement's last I-steel (6), go up I-steel (6) horizontal both sides and hang down I-steel (5) that are located pipeline (4) below through pendant (8) on the chain block, chain block (7), pendant (9) suspend in midair under the chain block, pipeline (4) are located I-steel (5) top down.
2. The construction structure based on cutter-suction type ground wall local replacement row pile support of claim 1, characterized in that:
the outer reinforcement cage of pipeline includes left side reinforcement cage (18) and right side reinforcement cage (19) of the horizontal both sides of pipeline (4), merges the butt joint to pipeline (4) center.
3. The construction structure based on cutter-suction type ground wall local replacement row pile support of claim 1, characterized in that:
the two end parts of the steel truss (1) are fixed on the hardened ground (8), the middle of the steel truss (1) is fixed at the top of the I-shaped steel platform (3), and the hardened ground (8) and the top of the I-shaped steel platform (3) are located at the same elevation.
4. The construction structure based on cutter-suction type ground wall local replacement row pile support of claim 1, characterized in that:
the two end parts of a steel truss (1) are fixed on a hardened ground (8), after the middle of the steel truss (1) is fixed on the top of an I-shaped steel platform (3), a chain block upper hanging piece (8) is hung on each of the two transverse sides of an I-shaped steel (6), a chain block passes through a chain block hole of the upper hanging piece (8), after soil is excavated downwards from the ground to the top and two sides of a pipeline (4) are removed, a narrow soil groove is dug at the bottom of the pipeline (4) to pass through a lower I-shaped steel (5), chain block lower hanging pieces (9) are installed on the two transverse sides of the lower I-shaped steel (5), then a chain block (7) passes through the chain block hole of the chain block lower hanging piece (9), the chain block is closed, the lower I-shaped steel (5) is leveled to the same elevation by the chain block, the suspension protection work of the pipeline (4) is completed, and the downward excavation is continued.
5. A construction method based on a cutter-suction type ground connecting wall local replacement row pile support is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps: firstly, a lattice column (2) is constructed, an I-shaped steel platform (3) is transversely placed at the top of the lattice column (2), a steel truss (1) is erected on the upper portion of the I-shaped steel platform (3), an upper I-shaped steel (6) and a lower I-shaped steel (5) of the steel truss (1) are connected through a chain block upper hanging piece (8), a chain block (7) and a chain block lower hanging piece (9) to form a hanging protection structure for hanging a pipeline (4) to be protected;
step two: two sides of the pipeline (4) for suspension protection are grabbed out of a leading guide groove (15) with the length of 2m and the width of 0.8m by a hydraulic grab bucket; after the first guide groove (15) is finished, the submersible drill (16) is in place, the guniting guide pipe (14) is inserted into the first guide groove (15), the submersible drill (16) is enabled to move downwards along the guniting guide pipe (14) to a soil body which cannot be grabbed by a hydraulic grab below a drilling pipeline, a drill bit cuts mud blocks and falls into the bottom of a groove in the drilling process, and dregs are discharged into a ground dreg bucket through the guniting guide pipe (14) along with mud by utilizing an air-lift reverse circulation air column formed by an air pipe (17);
step three: processing and hoisting of reinforcement cage
Processing the reinforcement cage into two parts, namely a left reinforcement cage (18) and a right reinforcement cage (19), by taking the center of a steel truss (1) of a pipeline which cannot be moved and changed and needs to be suspended and protected as a boundary, wherein the two parts adopt a male-female butt joint mode; after the reinforcement cage is processed, respectively hoisting a left reinforcement cage (18) and a right reinforcement cage (19) from two sides of a steel truss (1), moving to the center of a pipeline (4) protected by suspension, hoisting the upper parts of the two cages in place, then hoisting the side hoisting points of each cage close to the pipeline (4) protected by suspension simultaneously, and hoisting up and down back and forth to enable the two cages to be fully integrated to form an integral reinforcement cage (20);
step four: pouring concrete into wall
And pouring concrete to form the underground diaphragm wall (21) to finish the foundation pit sealing.
6. The construction method based on the cutter-suction type ground connecting wall local replacement row pile support as claimed in claim 5, characterized in that:
in the second step, when the grooving finishes drilling, the underwater drill (16) is lifted, so that the drill bit is close to the position below the steel truss (1) and is higher than the un-drilled soil surface; and simultaneously lifting the jet guide pipe to be 50-100 cm away from the bottom surface of the groove, moving the groove frame backwards to prepare for next drilling construction, overlapping 1/3 drill bit diameters at the front and back drilling positions, controlling the horizontal footage within 20cm each time according to stratum characteristics, drilling from one end of the unit groove section to the direction of the suspension frame until the grooving drilling at one side of the suspension frame is completed, and then constructing the other side, and completing 5-6 drills at least at one side until the grooving construction of the whole groove section is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338252.4A CN111058458A (en) | 2019-12-23 | 2019-12-23 | Construction method and structure based on cutter suction type ground connecting wall local replacement row pile support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911338252.4A CN111058458A (en) | 2019-12-23 | 2019-12-23 | Construction method and structure based on cutter suction type ground connecting wall local replacement row pile support |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749292A (en) * | 2020-07-02 | 2020-10-09 | 北京城建集团有限责任公司 | Construction process for grooving wall-connecting ground in pipeline dense area |
| CN113529693A (en) * | 2021-06-03 | 2021-10-22 | 中建一局集团建设发展有限公司 | Construction method for penetrating pipeline through cutter-suction type corner amplitude ground connecting wall |
| CN113863282A (en) * | 2021-09-14 | 2021-12-31 | 中建三局基础设施建设投资有限公司 | Continuous large-diameter pipeline underground diaphragm wall section construction method |
| CN113944185A (en) * | 2021-11-06 | 2022-01-18 | 中国建筑一局(集团)有限公司 | Large-scale municipal pipeline in-situ protection device and construction method thereof |
| CN113981952A (en) * | 2021-12-07 | 2022-01-28 | 中国铁建大桥工程局集团有限公司 | Air-lift reverse circulation cutter-suction type underground continuous wall construction method and underground continuous wall |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749292A (en) * | 2020-07-02 | 2020-10-09 | 北京城建集团有限责任公司 | Construction process for grooving wall-connecting ground in pipeline dense area |
| CN113529693A (en) * | 2021-06-03 | 2021-10-22 | 中建一局集团建设发展有限公司 | Construction method for penetrating pipeline through cutter-suction type corner amplitude ground connecting wall |
| CN113863282A (en) * | 2021-09-14 | 2021-12-31 | 中建三局基础设施建设投资有限公司 | Continuous large-diameter pipeline underground diaphragm wall section construction method |
| CN113944185A (en) * | 2021-11-06 | 2022-01-18 | 中国建筑一局(集团)有限公司 | Large-scale municipal pipeline in-situ protection device and construction method thereof |
| CN113981952A (en) * | 2021-12-07 | 2022-01-28 | 中国铁建大桥工程局集团有限公司 | Air-lift reverse circulation cutter-suction type underground continuous wall construction method and underground continuous wall |
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