CN110593264B - Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit - Google Patents
Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit Download PDFInfo
- Publication number
- CN110593264B CN110593264B CN201910709428.6A CN201910709428A CN110593264B CN 110593264 B CN110593264 B CN 110593264B CN 201910709428 A CN201910709428 A CN 201910709428A CN 110593264 B CN110593264 B CN 110593264B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- excavation
- foundation pit
- retaining wall
- equal
- 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.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
Abstract
The invention discloses an excavation construction method of an underground pipeline in-situ protection long and narrow deep foundation pit, which comprises the steps of measurement lofting, pipeline exploration, foundation pit support and foundation pit soil excavation, and is characterized in that: the excavation supporting includes: constructing steel sheet piles on two sides of the pipeline for enclosing; then obliquely driving the steel perforated pipe into the bottom of the pipeline at the gap between the steel sheet pile and the pipeline to complete hole leading and pipe burying of the steel perforated pipe, and then performing grouting construction; excavation of the foundation pit soil body comprises: and excavating a pipeline part soil body and excavating a steel sheet pile part soil body. The construction method can solve the technical problems of complex pipeline moving and changing, long construction period and high cost in the construction of the long and narrow foundation pit.
Description
Technical Field
The invention belongs to the technical field of foundation pit construction, and particularly relates to an excavation construction method of an underground pipeline in-situ protection long and narrow deep foundation pit.
Background
Along with the rapid development of various cities, the original overhead high-voltage electric wire is gradually cabled down to develop the construction of the comprehensive pipe rack; because the pipelines under urban main roads in old cities are numerous and have different burial depths and are complicated, a large amount of hidden pipelines with unobserved geophysical prospecting data exist, particularly, the pipelines at crossroads are difficult to move and change secondarily, the construction site is narrow and small, the construction period is long, no specific process report exists in the current research literature, and no better solution exists all the time.
At present, the common pipeline mode is changed construction in the excavation process of a foundation pit, so that the cost and the manufacturing cost are high, and the construction period is prolonged. Therefore, the foundation pit excavation construction method for pipeline in-situ protection is developed, and the important requirements for ensuring the construction period and the pipeline safety are met.
Disclosure of Invention
Aiming at the problems, the invention provides an excavation construction method for an underground pipeline in-situ protection long and narrow deep foundation pit, which aims to solve the technical problems of complex pipeline moving and changing, long construction period and high cost in the construction of the long and narrow foundation pit.
The invention is realized by the following technical scheme.
The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit comprises the steps of measurement lofting, pipeline exploration, foundation pit support and foundation pit soil excavation, and is characterized in that:
the excavation supporting includes: constructing steel sheet piles on two sides of the pipeline for enclosing; then obliquely driving the steel perforated pipe into the bottom of the pipeline at the gap between the steel sheet pile and the pipeline to complete hole leading and pipe burying of the steel perforated pipe, and then performing grouting construction;
excavation of the foundation pit soil body comprises: excavating a pipeline part soil body and excavating a steel sheet pile part soil body;
the excavation of the partial soil body of the steel sheet pile adopts layered and segmented excavation, the layer height of each layer of excavation is controlled to be less than or equal to 1m, and the width of each section of excavation is controlled to be less than or equal to 1 m;
in the excavation of the soil body of the pipeline part, the excavation of the soil above the pipeline is carried out in layers, and the layer height of each layer of excavation is less than or equal to 1 m; for earthwork excavation below a pipeline, when the pipe diameter of the pipeline is larger than or equal to 800mm, adopting layered and segmented excavation, namely excavating from one side of the pipeline in sequence, wherein the width of each segment of excavation is smaller than or equal to 1m, and the height of each layer of excavation is smaller than or equal to 1 m; when the pipe diameter of the pipeline is less than 800mm, adopting layered excavation, wherein the height of each excavated layer is less than or equal to 1 m; in the pipeline part soil excavation, after each layer or section of soil is excavated, performing wall protection construction of each section layer by layer or section by section until the pipeline part soil is excavated to the design depth of a foundation pit; the retaining wall construction method specifically comprises the steps of obliquely driving an anchor rod into the side face of a foundation pit of the pipeline part, welding and anchoring two ends of a horizontal support bar to the inner side of a steel sheet pile, connecting the horizontal support bar with the anchor rod in a spot welding mode, hanging a reinforcing mesh sheet, and pouring concrete to form the concrete retaining wall.
As a specific technical scheme, in the measurement lofting, the distance between the excavation side line of the foundation pit and the side line of the structure is 40-80 cm.
According to the specific technical scheme, in the pipeline exploration, the exploratory trenches are excavated along the longitudinal direction of the foundation pit and attached to the two sides of the foundation pit, 1 exploratory trench crossing the foundation pit is excavated every 6-15 m, and the exploratory trench depth is 0.6-2.5 m.
According to the specific technical scheme, in the foundation pit support, the pile length of a steel plate pile is more than or equal to 2 times of the depth of the foundation pit, the distance between the steel plate pile and the structural edge of a pipeline is more than or equal to 50cm, and the pile head is 0.15-0.3 m higher than the ground; the pile sinking tolerance of the steel sheet pile is controlled as follows: the longitudinal direction of the plane position is 100 mm, the transverse direction of the plane position is-50 mm-0 mm, and the verticality is not more than 5 per mill.
As a specific technical scheme, in the wall protection construction, when the pipe diameter of the pipeline is less than 300mm, a horizontal support is not arranged at the position of the pipeline; and when the pipe diameter of the pipeline is larger than or equal to 300mm, the horizontal branch stop is cut off at the position of the pipeline, and annular additional reinforcing steel bars are arranged around the pipeline and connected and reinforced with the horizontal branch stop.
As a specific technical scheme, in the wall protection construction, the anchoring length of the anchor rod is more than or equal to 3m, the anchoring angle is 45-60 degrees, and the tail end of the anchor rod is bent to form a hook part which is hung on the horizontal branch stop.
According to the specific technical scheme, in the retaining wall construction, each section of concrete retaining wall is of a trapezoidal structure with a wide upper part and a narrow lower part, and after the next section of concrete retaining wall is poured, mortar is adopted to trowel the previous section of concrete retaining wall; the top end of the concrete retaining wall at the topmost layer is poured into an inverted L shape with the length being more than or equal to 1m and 200-300 mm higher than the original ground.
According to the specific technical scheme, in the construction of the protective wall, the bent hook part hung on the horizontal supporting rail is in spot welding reinforcing connection with the horizontal supporting rail.
As a specific technical scheme, in the wall protection construction, a single-layer phi 14mm @200mm multiplied by 200mm steel bar mesh is adopted as the steel bar mesh; the concrete retaining wall is cast by C25 concrete, and an early strength agent is added.
As a specific technical scheme, in the retaining wall construction, the lower ends of the vertical steel bars of the upper layer of concrete retaining wall are anchored into the lower layer of concrete retaining wall, the lower ends of the vertical steel bars and the vertical steel bars of the lower layer of concrete retaining wall are overlapped by adopting double-sided spot welding, and the overlapping length is more than or equal to 5 d.
The invention has the beneficial effects that: the method can reduce the excavation area of the foundation pit so as to achieve the aims of green construction, land and soil resource saving, waste avoidance, environmental protection and safety; in the invention, the concrete retaining wall can be used as a waterproof layer, and the waterproof coiled material of the structure can be directly attached to the concrete retaining wall, so that the work efficiency is improved, and the construction period is shortened; the concrete retaining wall can be used as a structural outer wall template, so that the working hours of the procedures of formwork support, formwork removal, support erection and the like are reduced, and the efficiency is improved; the backfill of the wall back of the structure is avoided, and the uneven settlement can be reduced; the moving and the modifying of the pipeline are avoided, the construction site is saved, a large amount of temporary land can be saved, the later-stage road recovery time is reduced, and meanwhile, the moving and the modifying cost of the pipeline can be reduced, and the cost is saved.
Drawings
FIG. 1 is a plan view of the underground pipeline in-situ protection long and narrow deep foundation pit during excavation construction;
FIG. 2 is a schematic cross-sectional view of the underground pipeline in-situ protection long and narrow deep foundation pit during excavation construction according to the present invention;
FIG. 3 is a schematic layout view of steel floral tubes during excavation construction of the underground pipeline in-situ protection long and narrow deep foundation pit according to the present invention;
FIG. 4 is a schematic layout view of horizontal retaining pieces during excavation construction of the underground pipeline in-situ protection long and narrow deep foundation pit according to the present invention;
FIG. 5 is a schematic layout view of horizontal retaining pieces during excavation construction of the underground pipeline in-situ protection long and narrow deep foundation pit according to the present invention;
the meanings of the marks in the above figures are as follows: 1-steel flower pipes, 2-steel sheet piles, 3-pipelines, 4-concrete retaining walls, 5-horizontal retaining walls, 6-intercepting ditches, 7-existing ground, 8-drainage ditches, 9-central core soil, 10-anchor rods, 11-annular additional steel bars, 12-bent hook parts, 13-steel bar meshes, 14-steel sheet pile part soil bodies, 15-pipeline part soil bodies and 16-foundation pit elevation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Examples
Referring to fig. 1 and 2, the excavation construction method for an underground pipeline in-situ protection long and narrow deep foundation pit includes:
step one, measuring and lofting
Measuring and lofting according to the calculated width of the side line of the foundation pit;
step two, pipeline exploration
Manually exploring the pipelines within the range of the foundation pit, and identifying and protecting the explored pipelines;
step three, supporting the foundation pit
Constructing steel sheet piles 2 on two sides of the pipeline 3 for enclosing; then obliquely driving the steel perforated pipe 1 into the bottom of the pipeline 3 at the gap between the steel sheet pile 2 and the pipeline 3 to complete hole leading and pipe burying of the steel perforated pipe 1, and then performing grouting construction, as shown in fig. 3;
fourthly, excavating foundation pit soil body
Excavation of foundation pit soil bodies comprises: excavating a pipeline part soil body and excavating a steel sheet pile part soil body;
during excavation of partial soil body of the steel sheet pile, layered and segmented excavation is adopted, the height of each layer of excavation is controlled to be less than or equal to 1m, and the width of each section of excavation is controlled to be less than or equal to 1 m;
in the excavation of the soil body of the pipeline part, the excavation of the soil above the pipeline 3 is carried out in layers, and the layer height of each layer of excavation is less than or equal to 1 m; for the earthwork excavation below the pipeline 3, when the pipe diameter of the pipeline 3 is more than or equal to 800mm, the layered and segmented excavation is adopted, namely the excavation is sequentially started from one side of the pipeline 3, the width of each section of excavation is less than or equal to 1m, and the layer height of each layer of excavation is less than or equal to 1 m; when the pipe diameter of the pipeline 3 is less than 800mm, adopting layered excavation, wherein the height of each excavated layer is less than or equal to 1 m; in the pipeline part soil body excavation and the steel sheet pile part soil body excavation, the elevation of a foundation pit after the steel sheet pile part soil body excavation is controlled to be always 0.8-1.2 m lower than that of the foundation pit after the pipeline part soil body excavation, so that an operation platform is reserved for excavating the pipeline part soil body, and the pipeline part soil body excavation and the steel sheet pile part soil body excavation are both performed in a reserved core earthwork type step-by-step excavation mode; after the foundation pit bottom is excavated, gravel replacement and concrete cushion (the thickness of C20 is 15cm) pouring are carried out in time, and a rigid hinge is formed at the foundation pit bottom to play a role in supporting a foundation pit enclosure structure;
in addition, in the excavation of the pipeline part soil body, after each layer or section of soil body is excavated, the retaining wall construction of each section is carried out layer by layer or section by section, namely after each layer or section of supporting construction is finished, the core soil and the soil bodies on two sides of the next layer or section of foundation pit are excavated simultaneously, and the retaining wall construction and excavation processes of each section are carried out circularly until the pipeline part soil body is excavated to the designed depth of the foundation pit; referring to fig. 2, the retaining wall construction is specifically that an anchor rod 10 is obliquely driven into the side surface of a foundation pit of a pipeline part, then two ends of a horizontal support 5 are welded and anchored on the inner side of a steel sheet pile 2 and are connected with the anchor rod 10 in a spot welding mode, finally a steel bar mesh 13 is hung, and concrete is poured to form a concrete retaining wall 4;
further, in a specific embodiment, when the measurement lofting is carried out, the distance between the side line of the foundation pit excavation and the side line of the structure is 40-80 cm.
Further, in a specific embodiment, when the pipeline is explored, the exploratory trench is excavated along the longitudinal direction of the foundation pit and attached to two sides of the foundation pit, 1 exploratory trench crossing the foundation pit is excavated every 6-15 m, and the exploratory trench depth is 0.6-2.5 m.
Further, in a specific embodiment, during foundation pit supporting, the pile length of the steel sheet pile 2 is more than or equal to 2 times of the depth of the foundation pit, the distance between the steel sheet pile 2 and the structural edge of the pipeline 3 is more than or equal to 50cm, and the pile head is 0.15-0.3 m higher than the ground; the pile sinking tolerance of the steel sheet pile 2 is controlled as follows: the longitudinal direction of the plane position is 100 mm, the transverse direction of the plane position is-50 mm-0 mm, and the verticality is not more than 5 per mill.
Further, in a specific embodiment, when the pipe diameter of the pipeline 3 is less than 300mm, the horizontal support 5 is not provided at the position of the pipeline 3, please refer to fig. 5; referring to fig. 4, when the pipe diameter of the pipeline 3 is greater than or equal to 300mm, the horizontal support 5 is cut off at the position meeting the pipeline 3, and an annular additional steel bar 11 is arranged around the pipeline 3 to connect and reinforce the horizontal support 5.
Further, in a specific embodiment, during the wall protection construction, the anchoring length of the anchor rod 10 is more than or equal to 3m, the anchoring angle is 45-60 degrees, and the tail end of the anchor rod 10 is bent to form a hook part 12 which is hung on the horizontal supporting rail 5.
Further, in a preferred embodiment, when the retaining wall is constructed, please refer to fig. 2, each concrete retaining wall 4 is a trapezoid structure with a wide top and a narrow bottom, and after the next concrete retaining wall 4 is poured, mortar is used to trowel the previous concrete retaining wall 4; the top end of the concrete retaining wall 4 at the topmost layer is poured into an inverted L shape with the length being more than or equal to 1m and 200-300 mm higher than the original ground.
Further, in a preferred embodiment, the bent hook part 12 hung on the horizontal branch rail 5 is connected with the horizontal branch rail 5 by spot welding reinforcement during the construction of the protective wall.
Further, in a specific embodiment, when the wall protection is constructed, the reinforcing mesh 13 adopts a single layer of reinforcing mesh with the diameter of 14mm @200mm multiplied by 200 mm; the concrete retaining wall 4 is cast by C25 concrete, and an early strength agent is added.
Further, in a specific embodiment, during the construction of the retaining wall, the lower ends of the vertical steel bars of the previous layer of concrete retaining wall 4 are anchored into the next layer of concrete retaining wall 4, and are overlapped with the vertical steel bars of the next layer of concrete retaining wall 4 by adopting double-sided spot welding, and the overlapping length is more than or equal to 5 d.
Claims (8)
1. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit comprises the steps of measurement lofting, pipeline exploration, foundation pit support and foundation pit soil excavation, and is characterized in that:
the excavation supporting includes: constructing steel sheet piles (2) on two sides of the pipeline (3) for enclosing; then obliquely driving the steel perforated pipe (1) into the bottom of the pipeline (3) at the gap between the steel sheet pile (2) and the pipeline (3) to complete hole leading and pipe burying of the steel perforated pipe (1), and then performing grouting construction;
excavation of the foundation pit soil body comprises: excavating a pipeline part soil body and excavating a steel sheet pile part soil body;
the excavation of the partial soil body of the steel sheet pile adopts layered and segmented excavation, the layer height of each layer of excavation is controlled to be less than or equal to 1m, and the width of each section of excavation is controlled to be less than or equal to 1 m;
in the excavation of the soil body of the pipeline part, the earthwork above the pipeline (3) is excavated in layers, and the layer height of each layer of excavation is less than or equal to 1 m; for earth excavation below the pipeline (3), when the pipe diameter of the pipeline (3) is larger than or equal to 800mm, layered and segmented excavation is adopted, namely excavation is sequentially carried out from one side of the pipeline (3), the width of each excavation is smaller than or equal to 1m, and the layer height of each excavation is smaller than or equal to 1 m; when the pipe diameter of the pipeline (3) is less than 800mm, adopting layered excavation, wherein the height of each layer of excavation is less than or equal to 1 m; in the pipeline part soil excavation, after each layer or section of soil is excavated, performing wall protection construction of each section layer by layer or section by section until the pipeline part soil is excavated to the design depth of a foundation pit; the retaining wall construction is specifically that an anchor rod (10) is obliquely driven into the side face of a foundation pit of a pipeline part, then two ends of a horizontal supporting rail (5) are welded and anchored on the inner side of a steel sheet pile (2) and are connected with the anchor rod (10) in a spot welding mode, finally a reinforcing mesh (13) is hung, and concrete is poured to form the concrete retaining wall (4);
in the wall protection construction, when the pipe diameter of the pipeline (3) is less than 300mm, the position of the pipeline (3) is not provided with a horizontal support (5); when the pipe diameter of the pipeline (3) is larger than or equal to 300mm, the horizontal branch bumper (5) is cut off at the position meeting the pipeline (3), and an annular additional reinforcing steel bar (11) is arranged around the pipeline (3) to be connected and reinforced with the horizontal branch bumper (5);
in the retaining wall construction, each section of concrete retaining wall (4) is of a trapezoidal structure with a wide upper part and a narrow lower part, and after the next section of concrete retaining wall (4) is poured, mortar is adopted to trowel the previous section of concrete retaining wall (4); the top end of the concrete retaining wall (4) at the topmost layer is poured into an inverted L shape with the length being more than or equal to 1m and 200-300 mm higher than the original ground.
2. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 1, characterized in that in the measurement lofting, the distance between the excavation side line of the foundation pit and the side line of the structure is 40-80 cm.
3. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit as claimed in claim 1, wherein in the pipeline exploration, the exploratory trench is excavated along the longitudinal direction of the foundation pit and attached to two sides of the foundation pit, 1 exploratory trench crossing the foundation pit is excavated every 6-15 m, and the exploratory trench depth is 0.6-2.5 m.
4. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 1, characterized in that in the foundation pit support, the pile length of the steel sheet pile (2) is more than or equal to 2 times the depth of the foundation pit, the structural edge of the steel sheet pile (2) from the pipeline (3) is more than or equal to 50cm, and the pile head is 0.15-0.3 m higher than the ground; the pile sinking tolerance of the steel sheet pile (2) is controlled as follows: the longitudinal direction of the plane position is 100 mm, the transverse direction of the plane position is-50 mm-0 mm, and the verticality is less than or equal to 5 per mill.
5. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 1, characterized in that in the retaining wall construction, the anchoring length of the anchor rod (10) is more than or equal to 3m, the anchoring angle is 45 degrees to 60 degrees, and the tail end of the anchor rod (10) is bent to form a hook part (12) hung on the horizontal supporting rail (5).
6. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 5, characterized in that in the retaining wall construction, the hook part (12) hung on the horizontal supporting rail (5) is connected with the horizontal supporting rail (5) by spot welding for reinforcement.
7. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 1, characterized in that in the retaining wall construction, a single layer of phi 14mm @200mm x 200mm reinforcing mesh is adopted as the reinforcing mesh (13); the concrete retaining wall (4) is cast by C25 concrete, and an early strength agent is added.
8. The excavation construction method of the underground pipeline in-situ protection long and narrow deep foundation pit according to claim 1, characterized in that in the retaining wall construction, the lower ends of the vertical steel bars of the concrete retaining wall (4) in the previous layer are anchored into the concrete retaining wall (4) in the next layer, and the vertical steel bars of the concrete retaining wall (4) in the next layer are overlapped by adopting double-sided spot welding, and the overlapping length is more than or equal to 5 d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709428.6A CN110593264B (en) | 2019-08-01 | 2019-08-01 | Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709428.6A CN110593264B (en) | 2019-08-01 | 2019-08-01 | Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110593264A CN110593264A (en) | 2019-12-20 |
| CN110593264B true CN110593264B (en) | 2021-02-26 |
Family
ID=68853269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910709428.6A Active CN110593264B (en) | 2019-08-01 | 2019-08-01 | Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110593264B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501769B (en) * | 2020-04-30 | 2021-07-02 | 中国建筑第四工程局有限公司 | Construction method for protecting vertical main pipe of thermal spring well in foundation pit |
| CN112064751A (en) * | 2020-08-08 | 2020-12-11 | 上海静安市政工程有限公司 | Deep groove construction method for drainage pipeline |
| CN112921988B (en) * | 2021-02-25 | 2022-06-17 | 中国水利水电第五工程局有限公司 | Groove protection excavation supporting device and construction method thereof |
| CN113216215A (en) * | 2021-05-31 | 2021-08-06 | 中国水利水电第十一工程局有限公司 | Deep groove support reverse construction method in complex environment |
| CN113338307A (en) * | 2021-06-21 | 2021-09-03 | 中铁十二局集团有限公司 | Construction method of urban underground complex pipeline migration and transformation project based on box casing method |
| CN113684839B (en) * | 2021-09-07 | 2022-09-16 | 中电建十一局工程有限公司 | Excavation and support method for deep and narrow pipe trench under complex conditions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2291253C1 (en) * | 2005-06-30 | 2007-01-10 | Валерий Петрович Петрухин | Method for existent building, building structure and underground service line protection in construction affected zone |
| CN103321230A (en) * | 2013-07-12 | 2013-09-25 | 上海隧道工程股份有限公司 | Excavation method for deep and big foundation pit in long-distance crossing field for shallow-buried subway |
| CN106120801A (en) * | 2016-08-18 | 2016-11-16 | 中铁隧道集团二处有限公司 | In water-rich sand layer, pipeline crosses the construction method at foundation ditch |
| CN108442382A (en) * | 2018-03-06 | 2018-08-24 | 中铁十局集团城市轨道工程有限公司 | It crosses the pressure line in-situ conservation of deep basal pit and goes along with sb. to guard him soil-baffling structure and construction method |
| CN109024674A (en) * | 2018-07-26 | 2018-12-18 | 中国华冶科工集团有限公司 | Underground pipe gallery passes through protection underground utilities construction method |
-
2019
- 2019-08-01 CN CN201910709428.6A patent/CN110593264B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2291253C1 (en) * | 2005-06-30 | 2007-01-10 | Валерий Петрович Петрухин | Method for existent building, building structure and underground service line protection in construction affected zone |
| CN103321230A (en) * | 2013-07-12 | 2013-09-25 | 上海隧道工程股份有限公司 | Excavation method for deep and big foundation pit in long-distance crossing field for shallow-buried subway |
| CN106120801A (en) * | 2016-08-18 | 2016-11-16 | 中铁隧道集团二处有限公司 | In water-rich sand layer, pipeline crosses the construction method at foundation ditch |
| CN108442382A (en) * | 2018-03-06 | 2018-08-24 | 中铁十局集团城市轨道工程有限公司 | It crosses the pressure line in-situ conservation of deep basal pit and goes along with sb. to guard him soil-baffling structure and construction method |
| CN109024674A (en) * | 2018-07-26 | 2018-12-18 | 中国华冶科工集团有限公司 | Underground pipe gallery passes through protection underground utilities construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110593264A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110593264B (en) | Excavation construction method for underground pipeline in-situ protection long and narrow deep foundation pit | |
| CN109723065B (en) | Reinforcing device and deep foundation pit local freezing reinforcing construction method in water-rich gravel stratum | |
| CN102966119B (en) | Geogrid reinforced wall and construction method thereof | |
| CN112554198B (en) | Construction method of deep foundation pit protection structure adjacent to high-rise building | |
| CN105587320B (en) | Rich water sand-pebble layer abnormal shape deep shaft structural system and its construction method | |
| CN112982481B (en) | Structure construction method for crossing subway intersection node on pipe gallery | |
| CN102505704A (en) | Large open caisson construction method in soft geological shaft | |
| CN110820793A (en) | Composite foundation for collapsible loess area and construction method | |
| CN111779025A (en) | In-situ protection structure crossing foundation pit municipal pipe network box culvert and construction method | |
| CN113863367A (en) | In-situ protection suspension method for existing underground pipeline | |
| CN209923959U (en) | Open caisson structure for dry-process operation of high-groundwater-level soft soil field | |
| CN212175751U (en) | Integrated steel reinforcement cage for combined construction of underground continuous wall and cast-in-situ bored pile | |
| CN211312489U (en) | High rich water faces sea area diaphragm wall and connects sealing device | |
| CN110306989B (en) | Non-open-cut assembled pipe trench excavation supporting and reinforcing method | |
| CN110735641B (en) | Construction method of transfer passage of underpass pipeline | |
| CN111139863A (en) | Waterproof construction method for open cut semi-reverse construction method tunnel purlin enclosing node | |
| CN114033388B (en) | Shaft construction method for water-rich silty sand layer underground tunnel roof pipe | |
| CN216108526U (en) | Underground continuous wall structure for foundation pit support | |
| CN215256188U (en) | Overlapping shield tunnel foundation treatment structure for next-to-old house | |
| CN106968271B (en) | Underground pipe gallery excavates and the construction method of support | |
| CN111576393A (en) | Underground continuous wall construction method near subway | |
| CN112609706B (en) | Construction method of opposite-bracing angle brace concrete horizontal supporting structure of foundation pit in sea reclamation area | |
| CN111456029B (en) | Foundation pit supporting structure and construction method thereof | |
| CN218175855U (en) | Storehouse section of thick bamboo type secant pile underground lattice wall underground structure for protecting foundation pit | |
| CN107023012A (en) | Multiple tracks annular concrete support Deep Foundation Pit Excavation outward transport construction method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |