CN114319376A - Deep foundation pit supporting and excavating structure for complicated irregular staged implementation and construction method - Google Patents
Deep foundation pit supporting and excavating structure for complicated irregular staged implementation and construction method Download PDFInfo
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- CN114319376A CN114319376A CN202111608345.1A CN202111608345A CN114319376A CN 114319376 A CN114319376 A CN 114319376A CN 202111608345 A CN202111608345 A CN 202111608345A CN 114319376 A CN114319376 A CN 114319376A
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Abstract
The invention relates to a deep foundation pit supporting excavation structure implemented by complicated irregular stages and a construction method, which comprises the following steps: 1) constructing a steel pipe-steel plate-steel pipe support combined support; 2) constructing a double-row steel pipe-steel plate combined support; 3) the drilling cast-in-place pile-double row reinforced cement soil pile anchor combined supporting construction; 4) constructing a reinforced concrete support formwork; 5) reinforcing the pavement plate at the soil outlet; 6) and (5) earth excavation construction. The invention has the beneficial effects that: in the steel pipe-steel plate-steel pipe support combined supporting structure, the retractable quick-dismounting steel pipe bent frame arranged at the lower part of the steel pipe inclined support can be repeatedly used, is convenient to dismount and mount and has better benefit; in the double-row steel pipe-steel plate combined supporting structure, the adjustable inner support frame arranged between the double-row steel pipe piles can adjust the two rows of steel pipe piles by replacing the replaceable adjusting plates with different sizes, so that the double-row steel pipe-steel plate combined supporting structure is high in applicability.
Description
Technical Field
The invention relates to a complex irregular stage-by-stage deep foundation pit supporting excavation structure and a construction method, which are mainly suitable for supporting construction with narrow construction site and deeper foundation pit excavation.
Background
Along with the acceleration of the urbanization process, the land resources are more and more valuable, the foundation pit at the lower part of the building is deeper and deeper, the foundation pit is closer to the original peripheral buildings and the red line of the building, and the construction of underground engineering such as basements, civil air defense and the like of high-rise buildings in the complex environment that dense building groups and pipelines are criss-cross is more and more common. The condition is that the surrounding environmental conditions of the foundation pit are limited, no slope space exists, no construction surface for large-scale construction machinery operation exists, large-diameter cast-in-place piles or continuous walls cannot be constructed, and the traditional soil nailing wall, anchor-shotcrete support or pile-anchor support mode cannot meet the engineering requirements.
The steel pipe pile has many advantages in the foundation pit supporting engineering, can be widely applied to the engineering such as limited surrounding environmental conditions of the foundation pit, emergency rescue reinforcement and the like, but some construction sites are very narrow and small, the excavation depth is deep, the bearing capacity requirement cannot be met by a single supporting mode, and the construction space which is too small leads the excavator to have to walk on the horizontal support, so that the requirement on the bearing capacity of the horizontal support is extremely high.
In view of the above, aiming at various construction problems existing in the current deep foundation pit supporting construction, the invention of a simple, effective, complex and irregular deep foundation pit supporting excavation structure and construction method implemented in stages is urgently needed to improve the construction quality and construction efficiency of deep foundation pit supporting and excavation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a complex irregular excavation structure for implementing deep foundation pit supporting by stages and a construction method.
The construction method for implementing the deep foundation pit supporting excavation structure by complicated irregular stages comprises the following construction methods:
1) constructing a steel pipe-steel plate-steel pipe support combined support; constructing a steel sheet pile and a steel pipe pile, driving the steel sheet pile between the two steel pipe piles, constructing a cement stirring pile in a passive area on one side of the steel pipe pile, constructing a bottom plate and a force transmission belt on one side of the steel pipe pile, constructing a buttress II on the bottom plate, constructing a buttress I on the top of the steel sheet pile, installing a retractable quick-assembly and quick-disassembly steel pipe bent frame on the bottom plate, and installing a steel pipe support on the retractable quick-assembly and quick-disassembly steel pipe bent frame;
2) constructing a double-row steel pipe-steel plate combined support; constructing a steel sheet pile and a steel pipe pile, driving the steel sheet pile between the two steel pipe piles, then constructing a cement stirring pile in a passive area on one side of the steel pipe pile, then driving an outer discharge steel pipe pile, selecting a proper replaceable adjusting plate and an expansion end head to install through a fastening bolt, and then driving an adjustable inner supporting plate;
3) the drilling cast-in-place pile-double row reinforced cement soil pile anchor combined supporting construction; the method comprises the steps of manufacturing a crown beam prefabricated section in advance, constructing a driving area double-shaft cement mixing pile, then constructing a driven area cement mixing pile on one side of the driving area double-shaft cement mixing pile, constructing a hole-turning cast-in-place pile on the other side of the driving area double-shaft cement mixing pile, then constructing double rows of oblique reinforced cement soil piles on the top of the driving area double-shaft cement mixing pile, and installing the crown beam prefabricated section;
4) constructing a reinforced concrete support formwork; welding a lattice column sealing plate inside the top surface of the lattice column, welding leakage-proof angle steel outside the corresponding position of the lattice column, then welding a pre-embedded threaded sleeve on the lattice column, and installing a horizontal support stereotyped steel mould above the leakage-proof angle steel;
5) reinforcing the pavement plate at the soil outlet; constructing and compacting backfill on the concrete horizontal support, paving a roadbed box, newly driving a cast-in-place pile at a corresponding position, pouring a ground beam and a cast-in-place plate, finally installing a truss support on the cast-in-place plate, and installing a walkway plate on the truss support;
6) excavating and constructing earthwork; the excavator walks on the roadbed box, and then the foundation pit is excavated in a subarea mode.
Preferably, the method comprises the following steps: in the step 1), the put-type quick assembly disassembly steel pipe bent mainly comprises a supporting top plate, an inclined strut, a self-locking type hinged fastener and a supporting bottom plate, wherein the self-locking type hinged fastener is arranged on the supporting top plate and the supporting bottom plate, a steel pipe strut is arranged on the supporting top plate, two ends of the steel pipe strut are respectively connected with a buttress II and a buttress I, and the supporting top plate is connected with the supporting bottom plate through the inclined strut and a vertical strut.
Preferably, the method comprises the following steps: in the step 2), the adjustable inner supporting plate mainly comprises an expansion end, a reserved bolt hole, a replaceable adjusting plate, a fastening bolt and a reserved notch, the replaceable adjusting plate is fixed with the expansion end through the fastening bolt, the reserved notch is formed in the expansion end, and the reserved bolt hole is formed in both the replaceable adjusting plate and the expansion end.
Preferably, the method comprises the following steps: step 3), welding pre-buried porous steel sections on pre-buried steel plates of the precast sections between the two crown beam precast sections, then sealing and anchoring the reinforcement body of the reinforced cement-soil pile, then erecting a crown beam shaped template at the position of the crown beam cast-in-place section, fixing the crown beam shaped template by using a template inclined strut and a ground nail, and finally pouring concrete to form the crown beam cast-in-place section; and reserved beard ribs are arranged at two ends of the precast section of the crown beam.
Preferably, the method comprises the following steps: step 4), arranging batten plates on the latticed columns; a water-swelling rubber strip is arranged in a template splicing seam between two horizontal supporting regularized steel molds, a split screw is arranged between the horizontal supporting regularized steel molds at two sides, a template mantle fiber inner stay bar is arranged on a pre-embedded threaded sleeve, the rod end of the stay bar is tightly propped against the horizontal supporting regularized steel molds, and finally concrete is poured.
The deep foundation pit supporting and excavating structure is implemented according to the complex irregular stages and is obtained by construction according to the construction method.
The invention has the beneficial effects that:
1. in the steel pipe-steel plate-steel pipe support combined supporting structure, the retractable quickly-disassembled steel pipe bent frame arranged at the lower part of the steel pipe inclined support can be repeatedly used, is convenient to disassemble and assemble and has better benefit.
2. In the double-row steel pipe-steel plate combined supporting structure, the adjustable inner support frame arranged between the double-row steel pipe piles can adjust the two rows of steel pipe piles by replacing the replaceable adjusting plates with different sizes, so that the double-row steel pipe-steel plate combined supporting structure is high in applicability.
3. In the cast-in-situ and prefabrication combined supporting structure of the cast-in-situ bored pile and the double-row stiffening cement soil pile anchor, the construction progress is greatly accelerated.
4. In the easily-disassembled type finalized formwork system, the lattice columns are used for supporting the cast-in-place reinforced concrete horizontal supports, so that the steel consumption of the formwork supporting piece is reduced, and the economic benefit is better.
5. When the excavator walks on the reinforced concrete horizontal support, the protection system is adopted to protect the reinforced concrete horizontal support, so that the safety of unearthing operation is improved.
Drawings
FIG. 1 is a schematic view of a steel pipe-steel plate-steel pipe support combined supporting structure;
FIG. 2 is a schematic view of a double-row steel pipe-steel plate combined supporting structure;
FIG. 3 is a three-dimensional structure diagram of the adjustable inner supporting plate;
FIG. 4 is a plan view of the adjustable inner supporting plate;
FIG. 5 is a schematic view of a combined supporting structure of cast-in-situ bored pile and double rows of stiffening cement piles and anchors;
FIG. 6 is a structural diagram of a cast-in-place section and a prefabricated section of a crown beam;
FIG. 7 is a crown beam finalized template installation view;
FIG. 8 is a schematic view of an easily disassembled modular formwork system for supporting reinforced concrete;
FIG. 9 is a plan view of an easily disassembled modular formwork system;
FIG. 10 is a three-dimensional structure diagram of an easy-to-disassemble patterning formwork system;
fig. 11 is a schematic view of a truss-supported walkway plate construction with a soil outlet.
Description of reference numerals: 1. crown beam 2, plain concrete slope 3, brick drainage ditch 4, reinforced cement soil pile 5, force transmission belt 6, bottom plate cushion 7, steel plate pile 8, stiffening plate 9, steel pipe pile 13, buttress I14, buttress II 15, steel pipe support 16, passive area cement stirring pile 18, embedded steel section 19 supporting top plate 20, inclined strut 21, self-locking hinge fastener 22, supporting bottom plate 23, retractable quick dismounting steel pipe bent frame 24, adjustable inner supporting plate 25, enlarged end 26, reserved bolt hole 27, replaceable adjusting plate 28, fastening bolt 29, reserved notch 30, active area double-shaft cement stirring pile 31, drilled hole pouring pile 32, crown beam finalized template 33, crown beam prefabricated section 34, crown beam cast-in-place section 35, reserved beard rib 36, ground nail 37, template inclined strut 38, prefabricated section steel plate embedded 39, horizontal supporting finalized steel template 40, angle steel 41, lattice column 42, lattice column sealing plate 43, batten template splicing 45, threaded sleeve 46, threaded sleeve 47, prefabricated section steel plate embedded steel plate 39, horizontal supporting finalized steel template 40, angle steel plate 41, anti-leakage structure column 42, lattice column sealing plate 44, split joint 45, threaded sleeve 47 and embedded steel plate The construction method comprises the steps of wire inner supporting rods 48, water-swelling rubber strips 49, concrete horizontal supports 50, newly-drilled cast-in-place piles 51, walkway plates 52, cast-in-place plates 53, ground beams 54, truss supports 55, roadbed boxes 56 and backfilled soil.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As an example, the construction method for implementing the deep foundation pit supporting excavation structure by the complicated irregular stages comprises the following construction modes:
1) constructing a steel pipe-steel plate-steel pipe support combined support; constructing a steel sheet pile 7 and a steel pipe pile 9, driving the steel sheet pile 7 between the two steel pipe piles 9, then constructing a cement mixing pile 16 in a passive area on one side of the steel pipe pile, constructing a bottom plate and a force transmission belt 5, a buttress I and a buttress II, installing a retractable quick-assembly steel pipe bent 23 on the bottom plate, and installing a steel pipe support 15 on the retractable quick-assembly steel pipe bent 23.
2) Constructing a double-row steel pipe-steel plate combined support; constructing a steel sheet pile 7 and a steel pipe pile 9, driving the steel sheet pile 7 between the two steel pipe piles 9, then constructing a cement mixing pile 16 in a passive area on one side of the steel pipe pile, then driving an outer discharge steel pipe pile, selecting a proper replaceable adjusting plate 27 according to design requirements and installing an expansion end on an adjustable inner supporting plate 24 through a fastening bolt 28, and then driving the adjustable inner supporting plate 24.
3) The drilling cast-in-place pile-double row reinforced cement soil pile anchor combined supporting construction; the method comprises the steps of manufacturing a crown beam prefabricated section 33 in advance, constructing a double-shaft cement mixing pile 30 in an active area, constructing a cement mixing pile 16 in a passive area on one side, constructing a hole-turning cast-in-place pile 31 on the other side, constructing double-row oblique reinforced cement piles, immediately installing the crown beam prefabricated section, welding and embedding perforated section steel on a prefabricated section embedded steel plate 38 between the two prefabricated sections, then performing reinforced cement pile rib body sealing and anchoring, then erecting a crown beam shaping template, fixing by using a template inclined strut 37 and a ground nail 36, and finally pouring concrete.
4) Constructing a reinforced concrete support formwork; the lattice column sealing plate 42 is welded inside the top surface of the lattice column 41, the leakage-proof angle steel 40 is welded outside the corresponding position of the lattice column 41, then the embedded threaded sleeve 46 is welded on the lattice column, the horizontal support stereotyped steel die 39 is installed, the water-swelling rubber strip 48 is installed in the template abutted seam 44, the split screw 45 is installed between the horizontal support stereotyped steel dies 39 on the two sides, the template mantle fiber inner support rod is installed on the embedded threaded sleeve 46, the rod end is tightly propped against the horizontal support stereotyped steel die 39, and finally concrete is poured.
5) Reinforcing the pavement plate at the soil outlet; the back filling 56 is constructed and compacted on the concrete horizontal support 49, then the roadbed box 55 is paved, a cast-in-place pile is newly driven at the corresponding position, then the ground beam 53 and the cast-in-place plate 52 are poured, finally the truss support 54 is installed on the cast-in-place plate 52, and the walkway plate 51 is installed on the truss support 54.
6) Excavating and constructing earthwork; due to the fact that the construction surface is narrow, the excavator walks on the roadbed box 55, and then the foundation pit is excavated in a subarea mode.
The complex irregular phased deep foundation pit supporting excavation structure constructed according to the construction method comprises a steel pipe-steel plate-steel pipe support combined supporting structure, a double-row steel pipe-steel plate combined supporting structure, a cast-in-situ bored pile-double-row stiffening cement pile anchor combined supporting structure and an easily-detachable stereotyped formwork system.
The steel pipe-steel plate-steel pipe support combined supporting structure mainly comprises steel pipe piles 9, steel plate piles 7 and steel pipe supports 15, the steel plate piles 7 are arranged among the steel pipe piles 9, retractable steel pipe bent frames 23 capable of being disassembled and assembled quickly are arranged at the bottoms of the steel pipe supports 15, and passive area cement mixing piles 16 are arranged on one sides, close to a bottom plate, of the steel plate piles 7. The put formula quick assembly disassembly steel pipe framed bent 23 mainly comprises roof 19, bracing 20, from locking-type articulated fastener 21 and supporting baseplate 22, sets up from locking-type articulated fastener 21 on roof 19 and the supporting baseplate 22, sets up steel pipe support 15 on the roof 19, and 15 one ends of steel pipe support are set up buttress two 14, and the other end sets up buttress one 13, are connected through bracing 20 and erector between roof 19 and the supporting baseplate 22.
The double-row steel pipe-steel plate combined supporting structure mainly comprises double-row steel plate piles 7 and adjustable inner supporting plates 24, passive area cement mixing piles 16 are arranged on the edges of the inner-row steel pipe piles, and the adjustable inner supporting plates 24 are arranged between the inner-row steel pipe piles and the outer-row steel pipe piles. Adjustable inner support plate 24 mainly comprises expansion end 25, reserved bolt hole 26, removable regulating plate 27, fastening bolt 28 and reservation notch 29, and removable regulating plate 27 passes through fastening bolt 28 and enlarges the end 25 fixed, is equipped with reserved notch 29 on the expansion end 25, all is equipped with reserved bolt hole 26 on removable regulating plate 27 and the expansion end 25.
The bored concrete pile-double stiffening cement soil pile anchor combined supporting structure mainly comprises pre-buried porous section steel 18, double reinforced cement soil piles 4, an active area double-shaft cement stirring pile 30 and a crown beam prefabricated section 33, a passive area cement stirring pile 16 is arranged on one side of the active area double-shaft cement stirring pile 30, a bored concrete pile 31 is arranged on the other side of the active area double-shaft cement stirring pile 30, a prefabricated section pre-buried steel plate 38 is arranged in the crown beam prefabricated section 33 at the top of the active area double-shaft cement stirring pile 30, the pre-buried porous section steel 18 is welded on the outer side of the prefabricated section pre-buried steel plate 38, and the double reinforced cement soil piles 4 are installed through the pre-buried porous section steel 18. Reserved beard ribs 35 are arranged at two ends of the crown beam prefabricated section 33, the crown beam cast-in-place section 34 is poured through a crown beam forming template 32, a template inclined strut 37 is arranged on the outer side of the crown beam forming template 32, and a ground nail 36 is arranged at the bottom of the crown beam forming template 32.
Easy open formula regularization formwork system mainly comprises horizontal support regularization steel mould 39, lattice column 41 and split screw 45, and the 41 top of lattice column sets up leak protection angle steel 40, and the regularization steel mould 39 is supported to the installation level of the 40 top surfaces of leak protection angle steel, and the horizontal support regularization steel mould 39 of both sides sets up split screw 45 within a definite time. The bottom of the lattice column 41 is provided with a lattice column sealing plate 42, the lattice column 41 is provided with a pre-buried threaded sleeve 46, a template mantle fiber inner stay bar 47 is arranged between the pre-buried threaded sleeve 46 and the horizontal support regularization steel die 39, a water-swelling rubber strip 48 is arranged in a template splicing seam 44 between the two horizontal support regularization steel dies 39, and the lattice column 41 is provided with a batten plate 43.
A steel sheet pile 7 is arranged between the two steel pipe piles 9, and the top of the steel sheet pile 7 is a crown beam 1. And one side of the plain concrete slope 2 is provided with a brick drainage ditch 3, a stiffening plate 8 is arranged on a steel sheet pile 7, and a force transmission belt 5 and a bottom plate cushion layer 6 are arranged on one side of the steel sheet pile 7.
The unearthing port is provided with a walkway plate 51, the bottom of the walkway plate 51 is provided with a truss support 54, the reinforced concrete horizontal support 49 on one side of the double-shaft cement mixing pile 30 in the active area is provided with backfill 56, the backfill 56 is provided with a roadbed box 55, one end of the walkway plate 51 is arranged on the roadbed box 55, the bottom of the truss support 54 is provided with a cast-in-situ plate 52, the bottom of the cast-in-situ plate 53 is provided with a ground beam 53, and one end of the ground beam 53 is provided with a newly-driven cast-in-situ pile 50.
Claims (6)
1. A construction method for implementing a deep foundation pit supporting and excavating structure in complicated irregular stages is characterized by comprising the following construction methods:
1) constructing a steel pipe-steel plate-steel pipe support combined support; constructing a steel sheet pile (7) and a steel pipe pile (9), driving the steel sheet pile (7) between the two steel pipe piles (9), then constructing a cement mixing pile (16) in a passive area on one side of the steel pipe pile, constructing a bottom plate and a force transmission belt (5) on one side of the steel pipe pile, then constructing a buttress II (14) on the bottom plate, constructing a buttress I (13) on the top of the steel sheet pile (7), installing a retractable quick-dismounting steel pipe bent (23) on the bottom plate, and then installing a steel pipe support (15) on the retractable quick-dismounting steel pipe bent (23);
2) constructing a double-row steel pipe-steel plate combined support; constructing a steel sheet pile (7) and a steel pipe pile (9), driving the steel sheet pile (7) between the two steel pipe piles (9), then constructing a cement mixing pile (16) in a passive area on one side of the steel pipe pile, then driving an outer row of steel pipe piles, selecting a proper replaceable adjusting plate (27) to be installed with an expanding end head (25) through a fastening bolt (28), and then driving an adjustable inner supporting plate (24);
3) the drilling cast-in-place pile-double row reinforced cement soil pile anchor combined supporting construction; the method comprises the steps of manufacturing a crown beam prefabricated section (33) in advance, constructing a driving area double-shaft cement mixing pile (30), then constructing a passive area cement mixing pile (16) on one side of the driving area double-shaft cement mixing pile (30), constructing a hole-turning cast-in-place pile (31) on the other side of the driving area double-shaft cement mixing pile (30), then constructing double rows of oblique reinforced cement soil piles (4) on the top of the driving area double-shaft cement mixing pile (30), and installing the crown beam prefabricated section (33);
4) constructing a reinforced concrete support formwork; welding a lattice column sealing plate (42) inside the top surface of the lattice column (41), welding leakage-proof angle steel (40) outside the corresponding position of the lattice column (41), then welding a pre-embedded threaded sleeve (46) on the lattice column, and installing a horizontal supporting and sizing steel mould (39) above the leakage-proof angle steel (40);
5) reinforcing the pavement plate at the soil outlet; constructing and compacting backfill (56) on the concrete horizontal support (49), then paving a roadbed box (55), newly driving a cast-in-place pile at a corresponding position, then pouring a ground beam (53) and a cast-in-place plate (52), finally installing a truss support (54) on the cast-in-place plate (52), and installing a walkway plate (51) on the truss support (54);
6) excavating and constructing earthwork; the excavator walks on the roadbed box (55), and then the foundation pit is excavated in a subarea mode.
2. The construction method for implementing the deep foundation pit supporting excavation structure according to the complex irregular classification of claim 1, wherein the construction method comprises the following steps: in the step 1), the put-type quick assembly disassembly steel pipe bent frame (23) mainly comprises a supporting top plate (19), an inclined strut (20), a self-locking type hinged fastener (21) and a supporting bottom plate (22), the self-locking type hinged fastener (21) is arranged on the supporting top plate (19) and the supporting bottom plate (22), a steel pipe strut (15) is arranged on the supporting top plate (19), two ends of the steel pipe strut (15) are respectively connected with a second buttress (14) and a first buttress (13), and the supporting top plate (19) and the supporting bottom plate (22) are connected through the inclined strut (20) and a vertical strut.
3. The construction method for implementing the deep foundation pit supporting excavation structure according to the complex irregular classification of claim 1, wherein the construction method comprises the following steps: in step 2), the adjustable inner supporting plate (24) mainly comprises an expansion end head (25), a reserved bolt hole (26), a replaceable adjusting plate (27), a fastening bolt (28) and a reserved notch (29), the replaceable adjusting plate (27) is fixed with the expansion end head (25) through the fastening bolt (28), the reserved notch (29) is formed in the expansion end head (25), and the replaceable adjusting plate (27) and the expansion end head (25) are provided with the reserved bolt hole (26).
4. The construction method for implementing the deep foundation pit supporting excavation structure according to the complex irregular classification of claim 1, wherein the construction method comprises the following steps: in the step 3), pre-buried porous steel sections (18) are welded on pre-buried steel plates (38) of the precast sections between two crown beam precast sections (33), then reinforced cement pile rib body sealing and anchoring are carried out, then a crown beam shaped template (32) is erected at the position of a crown beam cast-in-place section (34), the crown beam shaped template is fixed by a template inclined strut (37) and a ground nail (36), and finally concrete is poured to form the crown beam cast-in-place section (34); reserved beard ribs (35) are arranged at two ends of the crown beam prefabricated section (33).
5. The construction method for implementing the deep foundation pit supporting excavation structure according to the complex irregular classification of claim 1, wherein the construction method comprises the following steps: in the step 4), a batten plate (43) is arranged on the lattice column (41); a water-swelling rubber strip (48) is arranged in a template splicing seam (44) between two horizontal supporting stereotyped steel dies (39), a split screw (45) is arranged between the horizontal supporting stereotyped steel dies (39) at two sides, a template wire sleeving inner support rod (47) is arranged on a pre-embedded threaded sleeve (46), the rod end of the template wire sleeving inner support rod is tightly propped against the horizontal supporting stereotyped steel dies (39), and finally concrete is poured.
6. The utility model provides a deep basal pit supporting excavation structure is implemented in complicated irregular stage which characterized in that: the construction method according to any one of claims 1 to 5.
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| CN202111608345.1A CN114319376A (en) | 2021-12-24 | 2021-12-24 | Deep foundation pit supporting and excavating structure for complicated irregular staged implementation and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775622A (en) * | 2022-05-18 | 2022-07-22 | 中铁二十二局集团有限公司 | Construction method of special-shaped deep foundation pit with construction space limitation of adjacent building structure |
| CN115506375A (en) * | 2022-11-04 | 2022-12-23 | 浙江交工地下工程有限公司 | Near bridge pile foundation U-shaped groove foundation pit excavation supporting system and construction method |
-
2021
- 2021-12-24 CN CN202111608345.1A patent/CN114319376A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775622A (en) * | 2022-05-18 | 2022-07-22 | 中铁二十二局集团有限公司 | Construction method of special-shaped deep foundation pit with construction space limitation of adjacent building structure |
| CN114775622B (en) * | 2022-05-18 | 2024-01-02 | 中铁二十二局集团有限公司 | Construction method for special-shaped deep foundation pit with limited construction space of close-proximity building structure |
| CN115506375A (en) * | 2022-11-04 | 2022-12-23 | 浙江交工地下工程有限公司 | Near bridge pile foundation U-shaped groove foundation pit excavation supporting system and construction method |
| CN115506375B (en) * | 2022-11-04 | 2023-11-03 | 浙江交工地下工程有限公司 | Excavation supporting system for U-shaped groove foundation pit close to bridge pile foundation and construction method |
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Application publication date: 20220412 |