CN116220064A - Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline - Google Patents

Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline Download PDF

Info

Publication number
CN116220064A
CN116220064A CN202310056774.5A CN202310056774A CN116220064A CN 116220064 A CN116220064 A CN 116220064A CN 202310056774 A CN202310056774 A CN 202310056774A CN 116220064 A CN116220064 A CN 116220064A
Authority
CN
China
Prior art keywords
fluid
steel sheet
solidified soil
pipeline
sheet pile
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.)
Pending
Application number
CN202310056774.5A
Other languages
Chinese (zh)
Inventor
范惜辉
史建
王军
曾文超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Environment Group Co ltd
Original Assignee
Nanjing Environment Group Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanjing Environment Group Co ltd filed Critical Nanjing Environment Group Co ltd
Priority to CN202310056774.5A priority Critical patent/CN116220064A/en
Publication of CN116220064A publication Critical patent/CN116220064A/en
Pending legal-status Critical Current

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
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/12—Back-filling of foundation trenches or ditches
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • 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
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
    • E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
    • 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)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Hydrology & Water Resources (AREA)
  • Agronomy & Crop Science (AREA)
  • Soil Sciences (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The invention discloses a construction method of a fluid-state solidified soil backfill steel sheet pile supporting pipeline backfill project, which comprises the steps of piling steel sheet piles, earth excavation, steel sheet pile supporting, foundation pit sand foundation, floating resistance of a pipeline, pouring and fixing, pile pulling, pouring the fluid-state solidified soil again, pulling out the steel sheet piles, maintaining and the like. The floating problem of pipeline in the work progress has been solved to this application adoption flow state solidified soil, and has used flow state solidified soil to backfill when the pile is pulled and the clearance filling problem of in situ behind the pile is pulled, has simplified the slurrying behind the pile is pulled, grouting process, optimizes pipeline engineering construction technology, simplifies the technological effect of work flow.

Description

Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for a fluid-state solidified soil backfill steel sheet pile support pipeline backfill project.
Background
The new construction, operation and maintenance of urban water supply and drainage pipelines involve trench excavation, and 0.3 square dregs can be produced 1 km by taking a trench with an excavation depth of 2 meters and a width of 1.5 meters as an example. The backfill material adopted usually needs backfill rolling, the typical groove section is limited by the narrow working section, the backfill material of the pipeline engineering is compacted without proper machinery, and additional manual tamping is needed; and particularly, a gravity pipe of a sewage pipeline is buried deeper, and the process is more complex when steel sheet pile support is involved.
Application publication number CN113929365A discloses self-compacting solidified soil and a use method thereof, and can solve the backfill construction problem that compacting machinery cannot enter or backfill materials cannot be compacted in the engineering. This patent describes the relevant procedures of construction of the fertilizer tank but does not relate to the process features that exist when the pipe is backfilled and when the steel sheet pile support is present.
For the buoyancy that the pipeline probably receives, application publication number "CN110566722A" discloses a construction method of restriction pipeline displacement and pipeline come-up, adopts special stull, bracing and pipeline stop device to tightly control the pipeline, but its published slot pipeline stop device is too loaded down with trivial details, based on present construction progress, uses so complicated stop device, is difficult to satisfy actual construction progress. In order to reduce the construction complexity of the process, application publication number CN114294473A discloses a floating-resistant construction method of a fluid soil trench buried pipe, and a calculation formula of a primary filling height h0 is given to avoid that buoyancy is greater than gravity, but the calculation process of the primary pouring depth h0 is excessively complicated.
Therefore, a construction method for the backfilling engineering of the fluid-state solidified soil backfilling steel sheet pile support pipeline is needed to be designed.
Disclosure of Invention
The invention aims to provide a construction method for a fluid-state solidified soil backfill steel sheet pile supporting pipeline backfill project, which solves the problems existing in the prior art, can overcome the defect that the compactness of the traditional rolling construction is difficult to meet the requirement, further expands the application scene of a fluid-state solidified soil backfill groove, and meets the project requirements of pipeline engineering on anti-floating and filling the gap after the steel sheet pile is pulled out.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a construction method of a fluid-state solidified soil backfill steel sheet pile supporting pipeline backfill project, which comprises the following steps:
s1, piling steel sheet piles, installing surrounding purlins, and pressing piles one by one after the steel sheet piles are inserted;
s2, excavating earthwork;
s3, supporting steel sheet piles;
s4, a foundation pit sand foundation; digging to the designed depth, and backfilling a sand cushion layer;
s5, installing the pipeline, stably arranging the pipeline at the bottom of the foundation pit, and smoothly connecting the pipeline
S6, floating resistance of the pipeline is achieved, and the pipeline is fixed by adopting a fluid state solidified soil pouring floating resistance or limiting device;
s7, pouring and fixing; pouring the fluid state solidified soil below a pavement, and dismantling the surrounding purlin and the steel sheet pile support;
s8, pile pulling, pouring the fluid solidified soil again, and pulling out the steel sheet pile;
s9, pouring again, and pouring the fluid solidified soil to the designed elevation after pile pulling is finished;
and S10, curing.
In the step 6, the fluid-state solidified soil pouring anti-floating is specifically that the fluid-state solidified soil is poured to the position of 1/2 of the height of the pipeline, and after standing for 2-3 hours, the fluid-state solidified soil is initially solidified, the follow-up pouring is carried out.
When the flow value of the fluid-state solidified soil is below 200mm, a vibrating procedure is added, so that the fluid-state solidified soil is ensured to fill all parts.
And after the fluid-state solidified soil is initially set, covering the fluid-state solidified soil with a film or geotextile for maintenance.
In the step 6, the limiting device comprises a u-shaped limiting block, and an arc surface at the bottom of the u-shaped limiting block is abutted to the top of the pipeline; the top of the u-shaped limiting block is fixedly provided with a perforated pipe, and the perforated pipe is fixedly connected with the bottom of the vertical supporting rod through a positioning bolt.
In the step 3, the concrete operation steps are that the steel sheet pile and the surrounding purlin are welded and reinforced in the groove along the steel sheet pile driving direction through channel steel;
a plurality of horizontal support rods are fixedly arranged in the enclosing purlin, and the horizontal support rods are fixedly connected with the tops of the vertical support rods.
The limiting device further comprises a lateral support rod, and two ends of the lateral support rod are respectively arranged on the horizontal support rod and the vertical support rod.
The distance between every two adjacent horizontal support rods is 2-3m.
In the step 8, the concrete operation steps of pile pulling are that the steel sheet pile is sequentially hammered and vibrated to pull up 1-2 m when the pile is pulled up, so that the steel sheet pile is loosened and then sequentially pulled up; and in the pile pulling process, the fluid solidified soil on the backfilled surface can directly infiltrate into the gap after pile pulling along with the vibration pile pulling process, and re-grouting is not needed.
The invention discloses the following technical effects: the floating problem of pipeline in the work progress has been solved to this application adoption flow state solidified soil, and has used flow state solidified soil to backfill when the pile is pulled and the clearance filling problem of in situ behind the pile is pulled, has simplified the slurrying behind the pile is pulled, grouting process, optimizes pipeline engineering construction technology, simplifies the technological effect of work flow.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of the construction process of the present invention;
FIG. 2 is a flow state solidified soil pouring anti-floating construction process;
FIG. 3 is a schematic illustration of an anti-float construction process for a spacing assembly;
FIG. 4 is a schematic diagram of a construction process in the prior art;
FIG. 5 is a schematic diagram of a limiting device;
FIG. 6 is an enlarged view of a portion of FIG. 5;
wherein, 1, steel sheet piles; 2. enclosing purlin; 3. a horizontal support bar; 4. a sand cushion layer; 5. a pipe; 10. a u-shaped limiting block; 11. a perforated tube; 12. positioning bolts; 13. a vertical support rod; 14. and a side support rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a construction method of a fluid-state solidified soil backfill steel sheet pile supporting pipeline backfill project, which comprises the following steps:
s1, piling steel sheet piles 1, installing enclosing purlins 2, and pressing piles one by one after the steel sheet piles 1 are inserted;
s2, excavating earthwork;
s3, supporting the steel sheet pile 1; after the steel sheet pile 1 is driven, in order to prevent the steel sheet pile 1 from deforming or tilting inwards when being subjected to lateral pressure after excavation, the surrounding purlin 2 and the steel sheet pile 1 are welded and reinforced by channel steel along the driving direction when the groove is excavated to a depth of 0.5-1 m, so that the surrounding purlin and the steel sheet pile 1 are integrated; a layer of horizontal supporting rods 3 are connected every 2-3 meters by bolts, and dregs between the supporting rods are continuously excavated until the design depth is reached.
S4, a foundation pit sand foundation; digging to the designed depth, and backfilling a sand cushion layer 4; and checking elevation at the bottom of the foundation pit to prevent over-digging or under-digging. Ensuring that no ponding, no sludge and no sundries exist at the bottom of the foundation pit, and backfilling coarse sand or broken stone in 10-20cm at the bottom of the pipeline 5;
s5, installing the pipeline 5, and adopting a manual operation mode and a crawler crane matched operation mode for the lower pipe. When the pipe is laid, the pipe joint is stably hung down, and the pipe joint is manually placed in an auxiliary manner, so that the pipelines 5 are smoothly connected;
s6, floating resistance is carried out on the pipeline 5, and the pipeline 5 is fixed by adopting a fluid state solidified soil pouring floating resistance or limiting device;
s7, pouring and fixing; pouring the fluid state solidified soil under the pavement, and dismantling the surrounding purlin 2 and the steel sheet pile 1;
s8, pile pulling, pouring fluid solidified soil again, and pulling out the steel sheet pile 1;
s9, pouring again, and pouring fluid solidified soil to the designed elevation after pile pulling is finished;
and S10, curing.
In one embodiment of the invention, the fluidized soil is solidified soil which has certain fluidity after a certain proportion and certain strength after maintenance and meets engineering requirements.
Further, the construction process of the conventional steel sheet pile supporting pipeline engineering is shown in fig. 4, wherein the steel sheet pile is removed after the pipeline 5 is installed, backfilled and tamped in layers and backfilled to the final elevation. For the residual gaps of the steel sheet piles, sand filling backfill or cement filling slurry backfill can be adopted.
Furthermore, when the steel sheet pile 1 is pulled out, part of the process is not used for recharging, and grouting is performed after the steel sheet pile 1 is pulled out, and when recharging, an additional pulping system, a grouting system and the like are involved, so that the process is complicated.
Furthermore, as the fluidized solidified soil has the characteristic of self-compaction, the complicated existing layered backfilling process can be avoided; meanwhile, due to the fluidity of the fluid-state solidified soil, the fluid-state solidified soil accumulated on the surface of the steel sheet pile 1 can directly infiltrate into the pile pulling and gaps generated after the pile pulling in the pile pulling process; and provides two feasible anti-floating measures in the construction process of the steel sheet pile supporting pipeline engineering.
In the step 6, the fluid-state solidified soil pouring anti-floating concrete is poured into the height of the pipeline 51/2, and after standing for 2-3 hours to enable the fluid-state solidified soil to be initially set, the follow-up pouring is carried out.
When the flow value of the fluid-state solidified soil is below 200mm, the vibrating procedure is added, so that the filling of all parts by the fluid-state solidified soil is ensured.
After the fluid-state solidified soil is initially set, the fluid-state solidified soil is covered with a film or geotextile for maintenance.
In the step 6, the limiting device comprises a u-shaped limiting block, and the arc surface at the bottom of the u-shaped limiting block is abutted to the top of the pipeline 5; the top of the u-shaped limiting block 10 is fixedly provided with a perforated pipe 11 which is fixedly connected with the bottom of the vertical supporting rod 13 through a positioning bolt 12.
In the step 3, the concrete operation steps are that the steel sheet pile 1 and the enclosing purlin 2 are welded and reinforced by channel steel along the driving direction of the steel sheet pile 1 in the groove;
a plurality of horizontal support rods 3 are fixedly arranged in the enclosing purlin 2, and the horizontal support rods 3 are fixedly connected with the tops of the vertical support rods 13.
The limiting device further comprises a lateral support rod 14, and two ends of the lateral support rod are respectively arranged on the horizontal support rod 3 and the vertical support rod 13.
In one embodiment of the invention, after the limit device is installed, the fluid solidified soil can be poured directly 0.5-1 m below the road surface. After the fluid-state solidified soil is initially set, the transverse support and the enclosing purlin are removed, the vertical support rod can be removed and recovered by using the limiting device, and pile pulling can be carried out by curing until the design strength is 50-70%.
The distance between two adjacent horizontal support rods is 2-3m.
In the step 8, the concrete operation steps of pile pulling are that the vibration steel sheet pile 1 is hammered in sequence to be pulled up by 1-2 meters when the pile is pulled up, so that the pile is loosened and then pulled up in sequence; in the pile pulling process, the fluid state solidified soil on the backfilled surface can directly infiltrate into the gap after pile pulling along with the vibration pile pulling process, and re-grouting is not needed.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements 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.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (9)

1. The construction method of the fluid-state solidified soil backfill steel sheet pile supporting pipeline backfill engineering is characterized by comprising the following steps:
s1, piling steel sheet piles, installing surrounding purlins, and pressing piles one by one after the steel sheet piles are inserted;
s2, excavating earthwork;
s3, supporting steel sheet piles;
s4, a foundation pit sand foundation; digging to the designed depth, and backfilling a sand cushion layer;
s5, installing the pipeline, stably arranging the pipeline at the bottom of the foundation pit, and smoothly connecting the pipeline
S6, floating resistance of the pipeline is achieved, and the pipeline is fixed by adopting a fluid state solidified soil pouring floating resistance or limiting device;
s7, pouring and fixing; pouring the fluid state solidified soil below a pavement, and dismantling the surrounding purlin and the steel sheet pile support;
s8, pile pulling, pouring the fluid solidified soil again, and pulling out the steel sheet pile;
s9, pouring again, and pouring the fluid solidified soil to the designed elevation after pile pulling is finished;
and S10, curing.
2. The construction method of the fluid-state solidified soil backfill steel sheet pile support pipeline backfill project according to claim 1, which is characterized in that: in the step 6, the fluid-state solidified soil pouring anti-floating is specifically that the fluid-state solidified soil is poured to the position of 1/2 of the height of the pipeline, and after standing for 2-3 hours, the fluid-state solidified soil is initially solidified, the follow-up pouring is carried out.
3. The construction method of the fluid-state solidified soil backfill steel sheet pile support pipeline backfill project according to claim 2, which is characterized in that: when the flow value of the fluid-state solidified soil is below 200mm, a vibrating procedure is added, so that the fluid-state solidified soil is ensured to fill all parts.
4. The construction method of the fluid-state solidified soil backfill steel sheet pile support pipeline backfill project according to claim 2, which is characterized in that: and after the fluid-state solidified soil is initially set, covering the fluid-state solidified soil with a film or geotextile for maintenance.
5. The construction method of the fluid-state solidified soil backfill steel sheet pile support pipeline backfill project according to claim 1, which is characterized in that: in the step 6, the limiting device comprises a u-shaped limiting block, and an arc surface at the bottom of the u-shaped limiting block is abutted to the top of the pipeline; the top of the u-shaped limiting block is fixedly provided with a perforated pipe, and the perforated pipe is fixedly connected with the bottom of the vertical supporting rod through a positioning bolt.
6. The construction method for the backfilling engineering of the fluid-state solidified soil backfilling steel sheet pile supporting pipeline is characterized by comprising the following steps: in the step 3, the concrete operation steps are that the steel sheet pile and the surrounding purlin are welded and reinforced in the groove along the steel sheet pile driving direction through channel steel;
a plurality of horizontal support rods are fixedly arranged in the enclosing purlin, and the horizontal support rods are fixedly connected with the tops of the vertical support rods.
7. The construction method for the backfilling engineering of the fluid-state solidified soil backfilling steel sheet pile supporting pipeline according to claim 6, which is characterized in that: the limiting device further comprises a lateral support rod, and two ends of the lateral support rod are respectively arranged on the horizontal support rod and the vertical support rod.
8. The construction method for the backfilling engineering of the fluid-state solidified soil backfilling steel sheet pile supporting pipeline according to claim 6, which is characterized in that: the distance between every two adjacent horizontal support rods is 2-3m.
9. The construction method of the fluid-state solidified soil backfill steel sheet pile support pipeline backfill project according to claim 1, which is characterized in that: in the step 8, the concrete operation steps of pile pulling are that the steel sheet pile is sequentially hammered and vibrated to pull up 1-2 m when the pile is pulled up, so that the steel sheet pile is loosened and then sequentially pulled up; and in the pile pulling process, the fluid solidified soil on the backfilled surface can directly infiltrate into the gap after pile pulling along with the vibration pile pulling process, and re-grouting is not needed.
CN202310056774.5A 2023-01-18 2023-01-18 Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline Pending CN116220064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310056774.5A CN116220064A (en) 2023-01-18 2023-01-18 Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310056774.5A CN116220064A (en) 2023-01-18 2023-01-18 Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline

Publications (1)

Publication Number Publication Date
CN116220064A true CN116220064A (en) 2023-06-06

Family

ID=86579889

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310056774.5A Pending CN116220064A (en) 2023-01-18 2023-01-18 Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline

Country Status (1)

Country Link
CN (1) CN116220064A (en)

Similar Documents

Publication Publication Date Title
CN102434717B (en) Construction method of joist steel pipe-jacking work pit
KR101179778B1 (en) Method for constructing underground structure
CN207512745U (en) A kind of caisson device and its foundation pit structure
KR100722665B1 (en) Steel guide wall for construction of underground diaphragm wall and construction method of underground diaphragm wall using the same
CN110258582B (en) Inclined support foundation pit supporting structure based on steel pipe pile and Lassen steel plate and construction method
CN111677095A (en) Construction method of drainage pipeline
CN108035379B (en) Comprehensive pipe gallery and construction method thereof
CN112064751A (en) Deep groove construction method for drainage pipeline
CN110485230B (en) Treatment structure and construction method of high-water-level soft soil bridge head roadbed
KR102196532B1 (en) Under ground structure construction method using composite steel pile underground column wall and top-down under ground structure therewith
CN113216213B (en) Basement waterproof foundation pit structure and construction method
CN110552371A (en) Construction method for eliminating horizontal construction joints of annular lining wall based on reverse construction method
CN104453915B (en) Big cross section vertical shaft pre-pouring grout reinforces Rapid Excavation method
CN104480945B (en) A kind of foundation ditch reversed construction method
CN104499489B (en) Foundation pit construction method
CN110344439B (en) Construction method of rear retaining wall drain hole
CN110241863B (en) Soft soil foundation pit excavation process pipe gallery deformation control device and control method thereof
CN218933157U (en) Backfill structure for pipeline construction
CN210163910U (en) Pipeline pipe jacking receiving well foundation pit supporting structure
CN111549789A (en) Reinforcing structure for foundation pit support and construction method thereof
CN112854198B (en) Construction method for treating old foundation of underground diaphragm wall
CN112144425B (en) Box culvert drainage ditch pouring method located at high water level and in sandy soil environment
CN116220064A (en) Construction method for backfilling engineering of fluid-state solidified soil backfilling steel sheet pile supporting pipeline
CN111042144A (en) Excavation method for foundation pit of underground beam under condition of continuous flow of riverway in cold region
CN111519603A (en) Device for comprehensively treating uneven settlement of underground buried pipe of soft soil foundation by combination of replacement and filling and grouting and 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