CN116537218A - Construction method for excavating and supporting soft stratum groove - Google Patents
Construction method for excavating and supporting soft stratum groove Download PDFInfo
- Publication number
- CN116537218A CN116537218A CN202310695330.6A CN202310695330A CN116537218A CN 116537218 A CN116537218 A CN 116537218A CN 202310695330 A CN202310695330 A CN 202310695330A CN 116537218 A CN116537218 A CN 116537218A
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- China
- Prior art keywords
- steel
- steel sheet
- groove
- excavating
- earthwork
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- 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.)
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Links
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 60
- 239000010959 steel Substances 0.000 claims description 60
- 238000009412 basement excavation Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 description 5
- 238000009933 burial Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a construction method for excavating and supporting a soft stratum trench, which belongs to the field of constructional engineering.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a construction method for excavating and supporting a soft stratum groove.
Background
Under the general condition, when old rain and sewage pipelines are reformed in urban areas, specific distribution positions and heights of the comprehensive pipelines are required to be ascertained by excavating a ditch according to underground comprehensive pipeline data provided by construction units, then supporting piles are constructed to prevent soil collapse, and newly-built rain and sewage pipelines are installed.
However, when the concrete data without pipelines only know the buried depth of the pipelines and the soil shear strength is low, and the construction area of the pipelines is difficult to ascertain, the supporting piles cannot be constructed first and then the grooves are dug, if the integral earthwork grouting reinforcement technology is adopted, the construction cost is high, the construction period is long, the environment is polluted, and the underground natural geological structure is damaged. Therefore, the invention provides a construction method for newly constructing a rain sewage pipe by digging grooves in a weak stratum or a quicksand stratum after the construction of a traditional steel plate support pile cannot be adopted because no specific data is known about the distribution and the burial depth of the pipeline when the municipal comprehensive pipeline is met.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the construction method is used for digging grooves in weak stratum or quicksand stratum, the distribution and the burial depth of municipal comprehensive pipelines are not known when the municipal comprehensive pipelines are subjected to specific data, and the novel construction method for constructing the rain sewage pipe by digging the grooves after the construction of the traditional steel plate support piles cannot be adopted.
The inventor obtains the technical proposal of the invention through practice and summary, and the invention discloses a construction method for excavating and supporting a soft stratum trench, which comprises the following steps:
leveling a weak stratum and a pipeline-free data section groove area field, determining the groove length of the section by measuring pay-off, calculating the length of a steel sheet pile needing to be spliced firstly, and according to the design elevation and the pipeline-free data section groove area field height Cheng Queding groove excavation depth;
step (2) according to the determined excavation depth, steel sheet piles with the length approximately the same as the excavation depth are selected to finish splicing on the groove area, and the spliced steel sheet piles, steel pipe supports and steel enclosing purlins are connected together in a full-welded mode;
step (3) evenly excavating and splicing earthwork between the steel sheet piles through a manual work and a long-arm excavator after the steel sheet piles and the steel pipe support and the steel surrounding purlin are welded, so that the earthwork slowly sinks through the reduction of the earthwork of an excavated area;
and (4) after sinking is completed, fully filling an upper template and square timber at the bottom of the support to prevent the continuous sinking for a part of height, and after newly building a rain sewage pipe, sectionally backfilling earthwork to sectionally cut off the connection between the bottommost steel pipe support and the steel enclosing purlin, and finally pulling out the steel sheet pile.
Preferably, in the step (2), the upper end and the lower end of the steel sheet pile are welded with steel supports and steel purlins.
Preferably, the offset is measured every 50 cm to 100cm in the sinking period in the step (3), and the offset is corrected by uneven excavation of earthwork in time until the steel pipe is supported and the thickness of the steel enclosing purlin is below the designed groove bottom elevation. .
Compared with the prior art, the invention can obtain the following technical effects:
the invention completes splicing on the groove area through the steel sheet piles, then excavates and sinks to the design elevation, effectively protects peripheral buildings and structures in soft stratum, no concrete pipeline data and town areas where slope excavation cannot be adopted, saves the cost and construction period compared with the integral grouting reinforcement method, and protects the environment and natural geological structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic plan view of the present invention.
FIG. 2 is a schematic cross-sectional view of the A-A side of the present invention.
Fig. 3 is a schematic view of a spliced steel sheet pile according to the present invention.
In the figure: 1. supporting a steel pipe; 2. steel purlin; 3. undisturbed soil; 4. road surface; 5. a synthetic pipeline; 6. spliced steel sheet piles; 7. an excavated finished region; 8. steel sheet piles.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principles of the invention will be further described with reference to the drawings and specific examples.
Examples
As shown in fig. 1-3: the figure shows undisturbed soil 3, a road surface 4, a synthetic pipeline 5 and an excavated finished region 7.
Step one: firstly, leveling a weak stratum and a pipeline-free data section groove area, determining the groove length of the section by measuring and paying off, calculating the length of the steel sheet pile 6 which needs to be spliced firstly, and according to the design elevation and the pipeline-free data section groove area height Cheng Queding groove excavation depth.
Step two: according to the determined excavation depth, steel sheet piles with the length approximately equal to the excavation depth are selected to finish splicing on the groove area, and the spliced steel sheet piles 6 after splicing are connected with the steel pipe support 1 and the steel enclosing purlin 2 in a full-welded mode, and the steel support 1 and the steel enclosing purlin 2 are welded at the upper end and the lower end of the steel sheet piles.
Step three: after the welding of the spliced steel sheet piles 6 and the steel pipe supports 1 and the steel enclosing purlins 2 is finished, the earthwork between the spliced steel sheet piles 6 is uniformly excavated and spliced by a manual work and a long-arm excavator, the earthwork is slowly sunk through the reduction of the earthwork in an excavated area, the offset is measured every 50 cm to 100cm during the sinking, and the offset is corrected through the uneven earthwork excavation in time until the thickness of the steel pipe supports 1 and the steel enclosing purlins 2 is sunk under the height of the designed tank bottom.
Step four: after sinking is completed, the upper template is fully filled at the bottom of the support, the square timber is prevented from sinking continuously for a part of height, after newly building a rain sewage pipe, the soil is backfilled in sections, the connection between the bottommost steel pipe support 1 and the steel enclosing purlin 2 is cut off in sections, and finally the steel sheet pile 8 is pulled out.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The construction method for excavating and supporting the soft stratum groove is characterized by comprising the following steps of:
leveling a weak stratum and a pipeline-free data section groove area field, determining the groove length of the section by measuring pay-off, calculating the length of a steel sheet pile needing to be spliced firstly, and according to the design elevation and the pipeline-free data section groove area field height Cheng Queding groove excavation depth;
step (2) according to the determined excavation depth, steel sheet piles with the length approximately the same as the excavation depth are selected to finish splicing on the groove area, and the spliced steel sheet piles, steel pipe supports and steel enclosing purlins are connected together in a full-welded mode;
step (3) evenly excavating and splicing earthwork between the steel sheet piles through a manual work and a long-arm excavator after the steel sheet piles and the steel pipe support and the steel surrounding purlin are welded, so that the earthwork slowly sinks through the reduction of the earthwork of an excavated area;
and (4) after sinking is completed, fully filling an upper template and square timber at the bottom of the support to prevent the continuous sinking for a part of height, and after newly building a rain sewage pipe, sectionally backfilling earthwork to sectionally cut off the connection between the bottommost steel pipe support and the steel enclosing purlin, and finally pulling out the steel sheet pile.
2. The construction method for excavating and supporting a soft stratum groove, as claimed in claim 1, wherein in the step (2), steel supports and steel purlins are welded on the upper end and the lower end of the steel sheet pile.
3. The construction method for excavating and supporting a soft stratum trench, as claimed in claim 1, wherein in the step (3), the offset is measured every 50-100cm in the sinking period, and the offset is corrected by uneven earth excavation in time until the steel pipe is sunk to the steel pipe support and the thickness of the steel purlin is below the designed trench bottom elevation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310695330.6A CN116537218A (en) | 2023-06-13 | 2023-06-13 | Construction method for excavating and supporting soft stratum groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310695330.6A CN116537218A (en) | 2023-06-13 | 2023-06-13 | Construction method for excavating and supporting soft stratum groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116537218A true CN116537218A (en) | 2023-08-04 |
Family
ID=87447265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310695330.6A Pending CN116537218A (en) | 2023-06-13 | 2023-06-13 | Construction method for excavating and supporting soft stratum groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116537218A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403340A (en) * | 2018-10-31 | 2019-03-01 | 中建三局第二建设工程有限责任公司 | A kind of construction method using open caisson as foundation pit enclosure structure |
-
2023
- 2023-06-13 CN CN202310695330.6A patent/CN116537218A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403340A (en) * | 2018-10-31 | 2019-03-01 | 中建三局第二建设工程有限责任公司 | A kind of construction method using open caisson as foundation pit enclosure structure |
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