CN111042151A - Foundation pit supporting structure for suspension protection of large-diameter and large-weight pipeline and construction method - Google Patents
Foundation pit supporting structure for suspension protection of large-diameter and large-weight pipeline and construction method Download PDFInfo
- Publication number
- CN111042151A CN111042151A CN202010003709.2A CN202010003709A CN111042151A CN 111042151 A CN111042151 A CN 111042151A CN 202010003709 A CN202010003709 A CN 202010003709A CN 111042151 A CN111042151 A CN 111042151A
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- China
- Prior art keywords
- pipeline
- concrete
- foundation pit
- steel
- truss
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
- F16L3/1091—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing with two members, the two members being fixed to each other with fastening members on each side
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
- F16L3/11—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing and hanging from a pendant
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a foundation pit supporting structure for suspension protection of a large-diameter and heavy-weight pipeline and a construction method thereof, wherein the foundation pit supporting structure comprises a foundation pit support structure, a concrete cross brace, a pipeline and a suspension protection system; the suspension protection system comprises a concrete tie beam, a steel truss and a steel wire rope; the concrete tie beam is arranged along the direction of the pipeline, and the concrete tie beam, the foundation pit support structure and the concrete cross brace are combined to form a concrete support truss system; the steel truss and the steel wire rope are arranged between the pipeline and the concrete cross brace to suspend and protect the pipeline; the steel truss comprises a plurality of vertical rods and a plurality of transverse rods, and the vertical rods and the transverse rods are fixed in a bolt connection or welding mode. During construction, a concrete tie beam is arranged along the direction of a pipeline to form a concrete support truss system; and then the steel truss and the steel wire rope are used for carrying out suspension protection on the pipeline. The concrete supporting truss system is adopted, so that the requirement of horizontal foundation pit supporting stress can be met, and the requirement of heavy pipeline suspension stress can be met.
Description
Technical Field
The invention relates to the technical field of foundation pit support construction, in particular to a foundation pit support structure for suspension protection of a large-diameter and heavy-weight pipeline and a construction method.
Background
Municipal pipelines below the urban road are dense; the underground space development is often carried out by moving and modifying, and the normal operation of urban functions is influenced by the moving and modifying of pipelines related to serious civil problems, so that the in-situ protection of the pipelines is often required.
The existing protection methods such as steel truss, section steel beam and the like are only suitable for pipelines (such as power supply, communication and the like) with low requirements on deformation control, but cannot meet the requirements of pipelines with large diameter and heavy weight, such as water pressing pipes or rain and sewage pipes with the diameter larger than D800mm and the weight larger than 1 t/m.
Therefore, preventing the deformation of the large-diameter and heavy-weight pipeline under the urban road is a technical problem which needs to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a foundation pit supporting structure for suspension protection of large-diameter and heavy-weight pipelines and a construction method, and aims to strictly control deformation and ensure normal use of pipelines when large-diameter and heavy-weight pipelines are encountered in the excavation process of an underground engineering foundation pit.
In order to achieve the purpose, the invention discloses a foundation pit supporting structure for suspension protection of a large-diameter and heavy-weight pipeline, which comprises a foundation pit support structure, a concrete cross brace, a pipeline and a suspension protection system.
The suspension protection system comprises a concrete tie beam, a steel truss and a steel wire rope;
the concrete tie beam is arranged along the pipeline direction, and the concrete tie beam, the foundation pit support structure and the concrete cross brace are combined to form a concrete support truss system;
the steel truss and the steel wire rope are arranged between the pipeline and the concrete cross brace to suspend and protect the pipeline;
the steel truss comprises a plurality of vertical rods and a plurality of transverse rods, and the vertical rods and the transverse rods are fixed in a bolt connection or welding mode.
Preferably, the steel truss is arranged in the middle of the pipeline, and the steel wire ropes are arranged at two ends of the pipeline.
Preferably, the pipeline joint of the pipeline is provided with a hoop, and the density of the steel truss at the pipeline joint is increased.
Preferably, each vertical rod is H-shaped steel or I-shaped steel; each cross bar is a channel steel.
Preferably, the cross bar at the uppermost part of the steel truss is arranged above the concrete wale, and an i-shaped steel bolster is arranged between the cross bar at the uppermost part and the concrete wale.
The invention also provides a construction method of the foundation pit supporting structure for suspension protection of the large-diameter and heavy-weight pipeline, which comprises the following steps:
step one, arranging the concrete tie beam along the pipeline direction, and combining the concrete tie beam with the foundation pit support structure and the concrete cross brace to form a concrete support truss system;
secondly, the steel truss and the steel wire rope are used for carrying out suspension protection on the pipeline; the steel truss is arranged in the middle of the pipeline, and the steel wire ropes are arranged at two ends of the pipeline;
and step three, applying prestress on the steel wire rope to tighten the steel wire rope, and adjusting the deformation of the pipeline.
The invention has the beneficial effects that:
the invention is combined with a foundation pit supporting system, and adopts a concrete supporting truss system, thereby not only meeting the requirement of supporting stress of the horizontal foundation pit, but also meeting the requirement of suspension stress of a heavy pipeline.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic plan view of an embodiment of the present invention.
Fig. 2 shows a schematic cross-sectional structure of a part of a steel truss in one embodiment of the invention.
Fig. 3 shows a schematic cross-sectional structure of a part of a steel wire rope according to an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view showing a part of the pipe joint according to an embodiment of the present invention.
Figure 5 shows a schematic view of a pipe joint section of a pipeline according to an embodiment of the present invention.
Figure 6 shows a schematic cross-sectional view of a pipe joint section of a pipe in an embodiment of the present invention.
Fig. 7 is a schematic structural view illustrating a connection between a vertical rod and a horizontal rod by welding according to an embodiment of the present invention.
Fig. 8 is a schematic structural view showing the bolted connection of the vertical bars and the horizontal bars in one embodiment of the invention.
Detailed Description
Examples
As shown in fig. 1 to 8, the foundation pit supporting structure for suspension protection of the large-diameter and heavy-weight pipeline comprises a foundation pit enclosure structure 3, a concrete cross brace 4, a pipeline 1 and a suspension protection system.
The suspension protection system comprises a concrete tie beam 2, a steel truss 5 and a steel wire rope 6;
the concrete tie beam 2 is arranged along the direction of the pipeline 1, and the concrete tie beam 2 is combined with the foundation pit support structure 3 and the concrete cross brace 4 to form a concrete support truss system;
the steel truss 5 and the steel wire rope 6 are arranged between the pipeline 1 and the concrete cross-brace 4 to suspend and protect the pipeline 1;
the steel truss 5 comprises a plurality of vertical rods 9 and a plurality of cross rods 10, and the vertical rods 9 and the cross rods 10 are fixed in a bolt connection or welding mode.
The principle of the invention is as follows:
the steel truss 5 is welded by a steel structure 12 or connected by bolts 13 to form a suspension system, so that the lateral stability and the vertical bearing effect are ensured; for narrow space where the steel truss 5 cannot be constructed, the steel wire ropes 6 are adopted at two ends of the pipeline 1 to play a vertical bearing role, the steel wire ropes 6 apply prestress to tighten up, and deformation of the pipeline is adjusted.
In some embodiments, a steel truss 5 is provided in the middle of the pipe 1 and steel cables 6 are provided at both ends of the pipe 1.
The steel wire rope 6 is adopted to suspend the pipeline in the end part area where the steel truss cannot be installed on the pipeline 1, and construction can be facilitated.
In some embodiments, the pipe 1 is provided with anchor ears 8 at the pipe joints 7, and the density of the steel trusses 5 at the pipe joints 7 is increased.
The pipe joint 7 is reinforced by the anchor ear 8 with a large diameter, and the support of the steel truss 5 is reinforced and fixed at the anchor ear 8, so that the important protection effect is achieved.
In some embodiments, each vertical rod 9 is H-section steel or i-section steel; each cross bar 10 is a channel steel.
In some embodiments, the uppermost cross bar 10 of the steel truss 5 is disposed above the concrete wale 4, and an i-beam pad 11 is disposed between the uppermost cross bar 10 and the concrete wale 4.
The invention also provides a construction method of the foundation pit supporting structure for suspension protection of the large-diameter and heavy-weight pipeline, which comprises the following steps:
step one, arranging a concrete tie beam 1 along the direction of a pipeline 1, and combining the concrete tie beam 1 with a foundation pit support structure 3 and a concrete cross brace 4 to form a concrete support truss system;
secondly, the pipeline 1 is suspended and protected by using a steel truss 5 and a steel wire rope 6; wherein, the steel truss 5 is arranged in the middle of the pipeline 1, and the steel wire ropes 6 are arranged at two ends of the pipeline 1;
and step three, applying prestress on the steel wire rope 6 for tightening, and adjusting the deformation of the pipeline.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. The foundation pit supporting structure for suspension protection of the large-diameter and heavy-weight pipeline comprises a foundation pit support structure (3) and a concrete cross brace (4); the device is characterized by also comprising a pipeline (1) and a suspension protection system;
the suspension protection system comprises a concrete tie beam (2), a steel truss (5) and a steel wire rope (6);
the concrete tie beam (2) is arranged along the direction of the pipeline (1), and the concrete tie beam (2), the foundation pit support structure (3) and the concrete cross brace (4) are combined to form a concrete support truss system;
the steel truss (5) and the steel wire rope (6) are arranged between the pipeline (1) and the concrete cross brace (4) to suspend and protect the pipeline (1);
the steel truss (5) comprises a plurality of vertical rods (9) and a plurality of transverse rods (10), and the vertical rods (9) and the transverse rods (10) are fixed through bolts or welding.
2. The large-diameter heavy-weight pipeline suspension protection foundation pit supporting structure according to claim 1, wherein the steel truss (5) is arranged in the middle of the pipeline (1), and the steel wire ropes (6) are arranged at two ends of the pipeline (1).
3. The large-diameter heavy-weight pipeline suspension protection foundation pit supporting structure according to claim 1, wherein an anchor ear (8) is arranged at a pipeline joint (7) of the pipeline (1), and the density of the steel truss (5) at the pipeline joint (7) is increased.
4. The large-diameter and heavy-weight pipeline suspension protection foundation pit supporting structure as claimed in claim 1, wherein each vertical rod (9) is an H-shaped steel or an I-shaped steel; each cross rod (10) is a channel steel.
5. The large-diameter heavy-weight pipeline suspension protection foundation pit supporting structure according to claim 1, wherein the uppermost cross bar (10) of the steel truss (5) is arranged above the concrete cross-brace (4), and an I-shaped steel backing beam (11) is arranged between the uppermost cross bar (10) and the concrete cross-brace (4).
6. The construction method of the foundation pit supporting structure for the suspension protection of the large-diameter and heavy-weight pipeline according to claim 1, comprising the following steps:
step one, arranging the concrete tie beam (1) along the direction of the pipeline (1), and combining the concrete tie beam (1), the foundation pit support structure (3) and the concrete cross brace (4) to form a concrete support truss system;
secondly, the steel truss (5) and the steel wire rope (6) are used for carrying out suspension protection on the pipeline (1); the steel truss (5) is arranged in the middle of the pipeline (1), and the steel wire ropes (6) are arranged at two ends of the pipeline (1);
and step three, applying prestress to the steel wire rope (6) for tightening, and adjusting the deformation of the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003709.2A CN111042151A (en) | 2020-01-03 | 2020-01-03 | Foundation pit supporting structure for suspension protection of large-diameter and large-weight pipeline and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003709.2A CN111042151A (en) | 2020-01-03 | 2020-01-03 | Foundation pit supporting structure for suspension protection of large-diameter and large-weight pipeline and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111042151A true CN111042151A (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010003709.2A Pending CN111042151A (en) | 2020-01-03 | 2020-01-03 | Foundation pit supporting structure for suspension protection of large-diameter and large-weight pipeline and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111042151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541414A (en) * | 2022-03-03 | 2022-05-27 | 深圳市工勘岩土集团有限公司 | Underground pipe culvert foundation pit reverse construction method excavation support construction method |
-
2020
- 2020-01-03 CN CN202010003709.2A patent/CN111042151A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541414A (en) * | 2022-03-03 | 2022-05-27 | 深圳市工勘岩土集团有限公司 | Underground pipe culvert foundation pit reverse construction method excavation support construction method |
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Address after: 230041 floors 14, 15, 16, 17 and 18 floors, Yingshang Road West and Yijing Road South, Hefei, Anhui Province Applicant after: HEFEI MUNICIPAL DESIGN AND RESEARCH INSTITUTE Co.,Ltd. Address before: 230041 floor 14, 15, 16, 17, 18, South riotous Nanguo office building, Yingshang Road West, Yijing Road South, Hefei City, Anhui Province Applicant before: HEFEI MUNICIPAL DESIGN AND RESEARCH INSTITUTE Co.,Ltd. |