CN115450229A - Pipeline groove excavation backfill construction method based on in-situ solidification of retaining wall slurry - Google Patents
Pipeline groove excavation backfill construction method based on in-situ solidification of retaining wall slurry Download PDFInfo
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- CN115450229A CN115450229A CN202211051951.2A CN202211051951A CN115450229A CN 115450229 A CN115450229 A CN 115450229A CN 202211051951 A CN202211051951 A CN 202211051951A CN 115450229 A CN115450229 A CN 115450229A
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- 239000002002 slurry Substances 0.000 title claims abstract description 54
- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000009412 basement excavation Methods 0.000 title claims abstract description 22
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 14
- 238000007711 solidification Methods 0.000 title claims description 6
- 230000008023 solidification Effects 0.000 title claims description 6
- 239000002689 soil Substances 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 238000004642 transportation engineering Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- E02D17/18—Making embankments, e.g. dikes, dams
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
-
- 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
- E02D2300/0023—Slurry
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0025—Adhesives, i.e. glues
Abstract
The invention discloses a pipeline trench excavation backfill construction method based on retaining wall slurry in-situ curing, which comprises the following steps of: the method comprises the steps of excavating a groove on a current road, excavating, injecting slurry into the groove and enabling the slurry liquid level to be always located on the bottom surface of the pavement of the current road until the groove is excavated to a design elevation; hoisting and lowering the pipe section to a preset position in the groove, and enabling the slurry liquid level to be always positioned on the bottom surface of the pavement of the existing road; adding a curing agent into the slurry in the groove and stirring and mixing the curing agent and the slurry to form fluid cured soil; and after the fluid solidified soil is hardened and reaches the design strength, constructing a road restoration pavement on the hardened fluid solidified soil. The invention has the advantages that: the method has the characteristics of reducing the quantity of earthwork outward transportation engineering, being convenient and quick to construct, being reliable in groove backfill quality, saving engineering cost and the like.
Description
Technical Field
The invention relates to the technical field of pipeline groove excavation and backfilling, in particular to a pipeline groove excavation and backfilling construction method based on wall protection slurry in-situ curing.
Background
Along with the development and construction of cities, municipal pipeline is newly built and rebuilt increasingly, and pipeline groove excavation is everywhere visible. In the traditional pipeline groove excavation construction, a pile plate type supporting structure and an inner supporting system are adopted, the construction process is complicated, and the assembly, disassembly and disturbance of components are frequent; the quantity of earthwork external transportation engineering is large, the earthwork is difficult to place, and dust generated in the transportation process pollutes the environment; the grooves need to be compacted in a layering mode during backfilling, the processes are multiple, additional disturbance is easily caused to a newly-arranged pipeline, the construction speed is low, and the backfilling quality is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a pipeline trench excavation backfill construction method based on wall protection slurry in-situ solidification, according to the defects of the prior art, slurry is injected into a trench while the trench is excavated, a pipeline is hoisted into the slurry in the trench, and a curing agent is added into the slurry to form hardened fluid-state solidified soil, so that the backfill quality of the trench can be effectively improved.
The purpose of the invention is realized by the following technical scheme:
a pipeline trench excavation backfill construction method based on wall protection slurry in-situ curing is characterized by comprising the following steps:
(S1) excavating a groove on a current road, and excavating, injecting slurry into the groove, and enabling the slurry liquid level to be always positioned on the bottom surface of the road surface of the current road until the groove is excavated to a designed elevation;
(S2) hoisting and lowering the pipe section to a preset position in the groove, and enabling the slurry liquid level to be always located on the bottom surface of the road surface of the existing road;
(S3) adding a curing agent into the slurry in the groove and stirring and mixing the curing agent and the slurry to form fluid cured soil;
and (S4) after the fluid solidified soil is hardened and reaches the designed strength, applying a road restoration pavement on the hardened fluid solidified soil.
Preparing the slurry by utilizing soil generated by excavating the groove, wherein the preparation proportion of the slurry is as follows: water to soil = 10.
The curing agent comprises the following components in percentage by weight: 40-60% of cement and 20-35% of Al rich in activity 2 O 3 And SiO 2 2 to 3 percent of surface modifier and 5 to 10 percent of activity excitant.
The preparation proportion of the flow state solidified soil is as follows: slurry curing agent =1, 0.5-0.7.
The pipeline section comprises pipeline and pipeline foundation just the pipeline passes through the pipeline staple bolt and the crab-bolt is fixed on the pipeline foundation, wherein, the pipeline foundation is followed the length direction interval arrangement of pipeline has a plurality of, seted up on the pipeline foundation with the arc recess of pipeline bottom looks adaptation, place the pipeline bottom in the arc recess, the pipeline staple bolt hug closely in pipeline top outer wall sets up and passes through the crab-bolt is fixed on the pipeline foundation.
The invention has the advantages that:
1. static pressure generated by slurry is utilized in the process of trench excavation, mud skin is formed on the trench wall, the trench wall can be prevented from collapsing, the water permeability of the trench wall is reduced, the problems that the construction process of the traditional pile-plate type enclosure structure and the inner support system is complicated, and the assembly and disassembly disturbance is frequent are effectively avoided, and the method has the advantage of convenient and rapid construction;
2. the earthwork excavated on site can be used as a preparation raw material of the breast wall slurry and the fluidized solidified soil, so that the external transportation engineering quantity of the earthwork is reduced, and the problems of difficult placement of the abandoned soil, dust emission, environmental pollution and the like are relieved to a certain extent;
3. after the pipeline is installed in place, curing agents are added into the groove retaining wall slurry and stirred to form fluid-state solidified soil, in-situ solidification backfilling is achieved, large tamping and rolling equipment is not needed on site, multiple procedures such as layering compaction backfilling and the like are not needed, additional damage to the pipeline in construction machines is reduced, the method has the advantages of being flexible and flexible in construction, high in construction speed, reliable in backfilling quality and the like, engineering quality can be guaranteed to the maximum extent, and engineering cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the step S1 of the construction method for excavating and backfilling the pipeline trench according to the invention;
FIG. 2 is a schematic diagram of step S2 of the pipeline trench excavation and backfilling construction method of the invention;
FIG. 3 is a schematic diagram of the step S3 of the construction method for excavating and backfilling the pipeline trench according to the present invention;
FIG. 4 is a schematic diagram of the pipeline trench excavation backfill construction method of the invention in step S4;
FIG. 5 is a schematic cross-sectional view of a duct and duct foundation of the present invention;
FIG. 6 is a schematic longitudinal cross-section of the pipe and pipe foundation of the present invention;
FIG. 7 is a schematic flow chart of a backfill construction method for a premixed flow state solidified soil foundation trench in the prior art.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1 to 6, reference numerals 1 to 10 denote a current road pavement 1, a current road subgrade 2, a trench 3, slurry 4, a pipeline 5, a pipeline foundation 6, an anchor bolt 7, a pipeline anchor ear 8, fluid solidified soil 9 and a road restoration pavement 10, respectively.
As shown in fig. 7, the backfill construction method for the premixed flow state solidified soil foundation trench in the prior art mainly comprises the following steps:
s1: preparing solidified soil, namely determining a solidified soil feeding mode, and feeding by adopting a stirring station or building a station on site;
s2: cleaning a foundation trench, namely cleaning the bottom of the foundation trench;
s3: constructing a gravel drainage ditch;
s4: building templates in a layered and sectional manner according to a solidified soil filling process;
s5: pouring solidified soil in layers;
s6: and after the lower layer construction is finished, the surface is strickled off, when the strength of the solidified soil reaches the strength of the human body, the next layer of solidified soil construction is carried out, and after the surface layer construction is finished, the surface is strickled off by using a special tool.
S7: and (4) protecting a finished product on site.
S8: curing the solidified soil.
The construction method has the advantages that:
1. the characteristics of fluidity and self-sealing property of the fluidized solidified soil are utilized, the chute or the pumping is used for backfilling the foundation trench, vibration is not needed, the construction process is convenient, and the problems of high difficulty and long backfilling period of the traditional backfilling construction are solved;
2. the fluid-state solidified soil is constructed in a layering way, the layering construction joint surface can be well combined without chiseling, a construction joint cannot be formed, and the backfilling quality can be guaranteed through layering construction and maintenance.
The disadvantages of this method are:
1. the templates and the supporting system thereof need to be built layer by layer, and the building, the inspection, the removal and the like of the templates still need to occupy a certain time;
2. the fluidized solidified soil needs to be fed by a mixing station or a field station, so that the construction site is occupied, and the transportation and transfer cost is high;
3. before backfilling, a supporting structure is still required to excavate the trench.
The embodiment is as follows: as shown in fig. 1 to 6, the present embodiment relates to a pipeline trench excavation backfill construction method based on in-situ curing of retaining wall slurry, and the construction method includes the following steps:
(S1) as shown in figure 1, excavating a groove 3 on the current road from top to bottom, and injecting slurry 4 into the groove 3 while excavating the groove 3 until the groove 3 is excavated to the designed elevation. Specifically, according to the design pipe position, construction layout is performed on the current road surface 1, the trench excavation width is determined, a slurry pool is arranged, and slurry 4 is configured by using the trench excavation soil body, in this embodiment, the preparation proportion of the slurry 4 may be: soil =10, and the practical application determines a proper proportion according to soil layer properties after tests. The slurry 4 is adopted to protect the wall of the excavated groove 3, the slurry 4 is replenished and injected along with the increase of the excavation depth, the liquid level of the slurry is always positioned at the bottom surface of the current road pavement 1 (the top surface of the current road subgrade 2), the wall of the groove is prevented from peeling and collapsing, the seepage inside and outside the wall of the groove is cut off, and the stability of the wall of the groove is ensured until the groove 3 is excavated to the designed elevation.
(S2) after the groove 3 is excavated to the designed elevation, hoisting a pipe section consisting of a pipeline 5 and a pipeline foundation 6 and lowering the pipe section into the groove 3 filled with the slurry 4, slowly adjusting the position and the elevation of the pipeline, and avoiding collision and disturbance of the wall of the groove in the hoisting process to influence the overall stability of the groove 3, wherein the pipeline foundation 6 is positioned on the bottom surface of the groove 3 in the embodiment. In the process of lowering the pipe section, the redundant slurry 4 in the groove 3 is timely pumped out, so that the liquid level is always positioned on the bottom surface of the road surface 1 of the current situation. As shown in fig. 5 and 6, the pipeline 5 is fixed on the pipeline foundation 6 through the pipeline hoop 8 and the anchor bolt 7, wherein the pipeline foundation 6 is provided with a plurality of parts along the length direction of the pipeline 5 at intervals, the pipeline foundation 6 is provided with an arc-shaped groove matched with the bottom of the pipeline 5, the bottom of the pipeline 5 is placed in the arc-shaped groove, and the pipeline hoop 8 is tightly attached to the outer wall of the top of the pipeline 5 and is fixed on the pipeline foundation 6 through the anchor bolt 7 arranged on two sides of the arc-shaped groove. The pipe sections can be manufactured in factories and then transported to the site or assembled directly on the site, and the pipeline foundation 6 is of a concrete structure and can be prefabricated or cast in situ.
(S3) as shown in figure 3, after the pipe section is put down in place, adding a curing agent into the slurry 4 in the groove 3, fully stirring the curing agent and the slurry 4 to form fluid solidified soil 9, and rapidly filling a gap between the pipe section and the groove 3 by utilizing the fluidity and the self-sealing property of the fluid solidified soil 9 positioned at the bottom surface of the road surface 1 to finish the groove backfilling. The fluid solidified soil 9 should be pre-prepared, and the slurry solidification can be carried out according to the proportion after the proportion of the slurry 4, the solidifying agent and the water is determined. Wherein the curing agent is CaO and active Al 2 O 3 And SiO 2 The inorganic hydraulic cementing material as main component consists of the following components in proportion: 40-60% of cement and 20-35% of Al rich in activity 2 O 3 And SiO 2 2 to 3 percent of surface modifier, 5 to 10 percent of activity excitant and the like. The preparation proportion of the fluid solidified soil 9 can be as follows: the slurry and curing agent =1 and the ratio is 0.5-0.7, and the actual application needs to be determined according to soil layer properties after tests.
(S4) as shown in FIG. 4, after the fluid solidified soil 9 is gradually hardened and reaches the designed strength, a road restoration pavement 10 is constructed on the hardened fluid solidified soil 9.
The embodiment also has the following beneficial effects: the defects that in the traditional pipeline groove excavation and backfilling construction process, the construction process of a pile plate type enclosure structure and an inner support system is complex, the assembly and disassembly disturbance is frequent, the earthwork outward transport engineering quantity is large, the compaction quality is difficult to guarantee, the construction period is long, the environmental protection problem is obvious and the like are overcome, and the method has the characteristics of reducing the earthwork outward transport engineering quantity, being convenient and rapid to construct, being reliable in groove backfilling quality, saving the engineering cost and the like.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (5)
1. A pipeline groove excavation backfill construction method based on wall protection slurry in-situ solidification is characterized by comprising the following steps:
(S1) excavating a groove on a current road, and excavating, injecting slurry into the groove, and enabling the slurry liquid level to be always positioned on the bottom surface of the road surface of the current road until the groove is excavated to a designed elevation;
(S2) hoisting and lowering the pipe section to a preset position in the groove, and enabling the slurry liquid level to be always located on the bottom surface of the road surface of the existing road;
(S3) adding a curing agent into the slurry in the groove and stirring and mixing the curing agent and the slurry to form fluid cured soil;
and (S4) after the fluid state solidified soil is hardened and reaches the design strength, constructing a road restoration pavement on the hardened fluid state solidified soil.
2. The pipeline trench excavation backfill construction method based on in-situ curing of the retaining wall slurry, as claimed in claim 1, wherein: preparing the slurry by utilizing soil generated by excavating the groove, wherein the preparation proportion of the slurry is as follows: water to soil = 10.
3. The pipeline trench excavation backfill construction method based on the in-situ curing of the retaining wall slurry as claimed in claim 1, characterized in that: the curing agent comprises the following components in percentage by weight: 40-60% of cement and 20-35% of Al rich in activity 2 O 3 And SiO 2 2 to 3 percent of surface modifier and 5 to 10 percent of activity excitant.
4. The pipeline trench excavation backfill construction method based on the in-situ curing of the retaining wall slurry as claimed in claim 1, characterized in that: the preparation proportion of the fluid solidified soil is as follows: slurry curing agent = 1.
5. The pipeline trench excavation backfill construction method based on the in-situ curing of the retaining wall slurry as claimed in claim 1, characterized in that: the pipeline section comprises pipeline and pipeline foundation just the pipeline passes through the pipeline staple bolt and the crab-bolt is fixed on the pipeline foundation, wherein, the pipeline foundation is followed the length direction interval arrangement of pipeline has a plurality of, seted up on the pipeline foundation with the arc recess of pipeline bottom looks adaptation, place the pipeline bottom in the arc recess, the pipeline staple bolt hug closely in pipeline top outer wall sets up and passes through the crab-bolt is fixed on the pipeline foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051951.2A CN115450229A (en) | 2022-08-31 | 2022-08-31 | Pipeline groove excavation backfill construction method based on in-situ solidification of retaining wall slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051951.2A CN115450229A (en) | 2022-08-31 | 2022-08-31 | Pipeline groove excavation backfill construction method based on in-situ solidification of retaining wall slurry |
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| CN115450229A true CN115450229A (en) | 2022-12-09 |
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|---|---|---|---|---|
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| CN112359848A (en) * | 2020-10-30 | 2021-02-12 | 北京住总第六开发建设有限公司 | Construction method for backfilling fertilizer groove by using solidified soil |
| KR20210043402A (en) * | 2019-10-13 | 2021-04-21 | 김건 | The safty construction method of the side ditch using the hardening agent |
| CN114086539A (en) * | 2021-11-24 | 2022-02-25 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Equipment and method for in-situ curing of building waste slurry |
| CN114411766A (en) * | 2022-03-01 | 2022-04-29 | 中煤江南建设发展集团有限公司 | Construction method of enclosure structure |
-
2022
- 2022-08-31 CN CN202211051951.2A patent/CN115450229A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329083A (en) * | 1977-01-26 | 1982-05-11 | Societe Soletanche | Methods of laying underground conduits |
| CN104895174A (en) * | 2015-06-02 | 2015-09-09 | 杭州江润科技有限公司 | Construction method of large-diameter rain sewage pipeline assembling type component structure |
| CN107572956A (en) * | 2017-09-11 | 2018-01-12 | 王继忠 | A kind of premixing fluidised form solidified earth |
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| KR20210043402A (en) * | 2019-10-13 | 2021-04-21 | 김건 | The safty construction method of the side ditch using the hardening agent |
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| CN114086539A (en) * | 2021-11-24 | 2022-02-25 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Equipment and method for in-situ curing of building waste slurry |
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