CN108505514B - Construction method of mud retaining wall of pile foundation in complex stratum - Google Patents
Construction method of mud retaining wall of pile foundation in complex stratum Download PDFInfo
- Publication number
- CN108505514B CN108505514B CN201810321318.8A CN201810321318A CN108505514B CN 108505514 B CN108505514 B CN 108505514B CN 201810321318 A CN201810321318 A CN 201810321318A CN 108505514 B CN108505514 B CN 108505514B
- Authority
- CN
- China
- Prior art keywords
- slurry
- water
- drilling
- pile foundation
- sediment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a construction method of a mud retaining wall of a pile foundation in a complex stratum, which comprises the following steps: the construction method comprises the steps of excavating a clean water pool, filling clean water, adding alkaline matters to adjust the pH value of the clean water, embedding a protective barrel in a to-be-constructed section according to a conventional method, injecting prepared slurry water into the protective barrel, scattering polymer slurry on the slurry water in the protective barrel, stirring and standing to obtain special slurry, starting drilling by using a rotary drill, adding the slurry water and the slurry polymer into the protective barrel in the drilling process, stirring by using a rotary drill rod to finish drilling construction, detecting the thickness of sediment of the drilled hole, hoisting a steel reinforcement cage and a guide pipe to perform concrete construction after the drilled hole is checked to be qualified, and finally pulling out the guide pipe and the protective barrel to finish pile foundation construction. The invention adopts the polymer slurry with the molecular weight of 3000-3500 ten thousand, exerts the maximum viscosity after hydrolysis, simultaneously has the drilling speed of 8-10 m/h, leads the polymer slurry to be uniformly mixed with water, reduces the stirring time and promotes the high viscosity of the special slurry.
Description
Technical Field
The invention belongs to the technical field of construction, and particularly relates to a construction method of a mud dado of a pile foundation in a complex stratum.
Background
The ecological environment is fragile in northwest loess plateau areas and desert edge areas in China, the geology of a bridge section is mostly sandy new loess, medium sand and silt, the phenomena of hole collapse, drill bit burying, hole expansion, difficulty in slurry treatment and the like are very easy to occur in the construction of the sandy soil bridge foundation drilling pile under the geological condition, and the traditional bentonite mineral slurry wall protection construction method is high in manufacturing cost, large in environmental damage, long in consumed time and high in cost.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a method for constructing a mud dado of a pile foundation in a complex stratum.
In order to achieve the above objects or other objects, the present invention is achieved by the following technical solutions:
a construction method of a mud dado of a pile foundation in a complex stratum comprises the following steps:
s1: preparing muddy water: constructing and excavating a clean water pool, filling clean water, and adding alkaline substances to adjust the pH value of the clean water to 8-10;
s2: embedding a protection cylinder: excavating a round pit in a to-be-constructed section according to a conventional method and embedding a pile casing;
s3: preparing slurry: injecting the prepared slurry water into a protective cylinder by using a water pump, uniformly scattering polymer slurry on the slurry water in the protective cylinder, stirring, standing for 1-2 h, and standing for 18-24 h to obtain special slurry with the viscosity of 38-45 s and the sand content of less than 0.5%, wherein the mass-volume ratio of the slurry water injected into the protective cylinder to the polymer slurry is 1: 0.8-1.1, wherein the molecular weight of the adopted polymer slurry is 3000-3500 ten thousand;
s4: drilling to form a hole: after the preparation of the special slurry in the pile casing is finished, drilling is started by using a rotary drilling rig, during the drilling process, slurry water is added into the pile casing through a water pump, slurry polymers are uniformly scattered on the water flow sprayed into the pile casing according to the proportion in the step S3, under the action that the drilling speed is kept at 8-10 m/h, a drill rod of the rotary drilling rig is used for stirring, the slurry is always kept in a stirring state until the drilling is carried out to a position 3-5 m away from the bottom of a designed pile foundation, the slurry water and the polymer slurry are stopped being added, finally, the drilling construction is finished, and the sediment thickness of the drilled hole is detected;
s5: hoisting a steel reinforcement cage and constructing concrete: after the drilling inspection is qualified, hoisting the steel reinforcement cage and the guide pipe, and inspecting the thickness of the sediment again, and performing concrete construction after the drilling inspection is qualified;
s6: pile forming: and (4) after the concrete is poured, pulling out the guide pipe, pulling out the pile casing before the concrete is initially set, and solidifying the concrete to finish the pile foundation construction.
Further, in step S1, the size of the clean water tank is 3 to 5 × 2.5m 3.
Further, the alkaline substance can be dissolved in a water tank filled with tap water before being added to obtain an alkaline solution, and the alkaline solution is added into a clean water tank.
Further, in step S3, the polymer slurry is prepared from hydrolyzed polyacrylamide, CMC, cationic polyacrylamide, and vegetable gum in a mass ratio of 1: 2-4: 5-10: 1-3, and mixing.
Further, the thickness of the sediment is not more than 5cm when the sediment is qualified, and if the sediment is not qualified, a slurry changing method is adopted to clean the hole until the thickness of the sediment is qualified; in step S5, the thickness of the sediment is not more than 20cm when the sediment is qualified.
Further, in step S5, when the concrete is poured, the slurry can be recycled to the clean water pool for recycling.
The invention has the beneficial effects that: 1. environmental protection and no pollution: the used special mud can be gradually degraded after being aired until being evaporated, and can be directly discharged or reused after the effective components of the mud polymer are completely degraded; 2. strong viscosity and quick condensation: the polymer slurry is prepared from hydrolyzed polyacrylamide, CMC, cationic polyacrylamide and vegetable gum according to the mass ratio of 1: 2-4: 5-10: 1-3, the molecular weight of the polymer slurry is more than 3000-3500 ten thousand, the polymer slurry can exert the maximum viscosity and rapidly precipitate drilling slag after hydrolysis, and meanwhile, the polymer slurry and the slurry water which are added subsequently are uniformly mixed by the continuous stirring of a drill rod and the drilling speed of 8-10 m/h, so that the stirring time is reduced, and the high viscosity of the special slurry is promoted; 3. the wall hole has good stability, the rotary drilling construction is adopted, the tunneling speed is high, the rotary drilling can provide pressure for the wall, collapse of a drilled hole in an unstable stratum is prevented, and the tunneling speed is improved; 4. no damage to the structure: the special slurry has no damage to the mechanical property of the steel bar and the concrete; 5. the material is easy to store, the mixing process is simple, and excessive labor input is not needed.
Drawings
FIG. 1 is a construction flow chart of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
A construction method of a mud dado of a pile foundation in a complex stratum comprises the following steps: s1: preparing muddy water: constructing and excavating a clean water pool with the size of 3-5 x 2.5m3Filling clear water and adding alkaline substances to adjust the pH of the clear water to 8-10, wherein the alkaline substances can be placed into a bucket filled with tap water to be dissolved before being added to obtain alkaline solution, and then adding the obtained alkaline solution into a clear water pool; s2: embedding a protection cylinder: excavating a round pit in a to-be-constructed section according to a conventional method and embedding a pile casing; s3: preparing slurry: injecting prepared slurry water into a pile casing by using a water pump, uniformly scattering polymer slurry on the slurry water of the pile casing, stirring for 1-2 h, standing for 18-24 h to obtain special slurry with the viscosity of 38-45 s and the sand content of less than 0.5%, and detecting the performance of the prepared special slurry after stirring, wherein the mass-volume ratio of the slurry water injected into the pile casing to the polymer slurry is 1: 0.8-1.1, wherein the polymer slurry is prepared from hydrolyzed polyacrylamide, CMC, cationic polyacrylamide and vegetable gum according to a mass ratio of 1: 2-4: 5-10: 1-3, and the molecular weight of the finally prepared polymer slurry is 3000-3500 ten thousand; s4: drilling to form a hole: after the preparation of the special mud in the casing is finished, the rotary drilling is used for starting drilling, during the drilling process, the mud water is added into the casing through the water pump, the mud polymer is uniformly scattered on the water flow sprayed into the casing according to the proportion in the step S3, the polymer mud in the casing and the addition amount of the mud water are added on the premise of ensuring that the height of the mud liquid level is not lower than 1/2 of the casing, meanwhile, a specially-assigned person is required to be responsible for adding work, at the moment, under the action that the drilling speed is kept at 8-10 m/h, the rotary drilling rod is utilized for stirring, the slurry is always kept in a stirring state until the drilling reaches 3-5 m from the bottom of the designed pile foundation, the slurry water and the polymer slurry are stopped to be added, and finally the drilling construction is finished, detecting the thickness of the sediment of the drilled hole, wherein the qualified sediment thickness is not more than 5cm, and if the sediment thickness is not qualified, cleaning the hole by adopting a slurry changing method until the sediment thickness is qualified; s5: hoisting a steel reinforcement cage and constructing concrete: after the drilling inspection is qualified, hoisting the steel reinforcement cage and the guide pipe and inspecting the thickness of the sediment again, wherein the sediment thickness is qualifiedThe required thickness is not more than 20cm, unqualified holes need to be cleaned by adopting a grout changing method, high-pressure water injection assistance can be adopted, and concrete construction can be carried out after the qualified holes are formed; when concrete is poured, the specially-made slurry can be recycled and put into a clean water pool, and can be gradually degraded after being aired until being evaporated, and the slurry can be directly discharged or reused after the effective components of the slurry polymer are completely degraded; s6: pile forming: and (4) after the concrete is poured, pulling out the guide pipe, pulling out the pile casing before the concrete is initially set, and solidifying the concrete to finish the pile foundation construction.
The construction method is characterized in that firstly, polymer slurry is obtained through indoor experiments, secondly, a plurality of experimental sections which are similar to the stratum structure of the to-be-constructed section are selected near the to-be-constructed section and are summarized after a plurality of experiments, and experimental data are detailed in the following table.
Wherein A is hydrolyzed polyacrylamide, B is CMC, C is cationic polyacrylamide, D is vegetable gum, the stirring time is the stirring time in the preparation process of the special mud; as can be seen from the embodiments 1, 2, 3, 4 and 8, the method of the invention uses the rotary drilling rod to stir the polymer slurry and the muddy water in the drilling process, and the drilling speed has a certain influence on the final formation of the retaining wall; it can be seen from examples 1, 2, 4, 5, 9 that the viscosity range of the tailored slurry initially prepared in the casing has some effect on the formation of the final casing wall; from the comparison of examples 6 and 7 with the examples, it can be seen that the difference in molecular weight of the polymer slurries prepared in a certain proportion according to the invention likewise has a certain influence on the formation of the final retaining wall.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (6)
1. A construction method of a mud dado of a pile foundation in a complex stratum is characterized by comprising the following steps,
s1: preparing muddy water: constructing and excavating a clean water pool, filling clean water, and adding alkaline substances to adjust the pH value of the clean water to 8-10;
s2: embedding a protection cylinder: excavating a round pit in a to-be-constructed section according to a conventional method and embedding a pile casing;
s3: preparing slurry: injecting the prepared slurry water into a protective cylinder by using a water pump, uniformly scattering polymer slurry on the slurry water in the protective cylinder, stirring, standing for 1-2 h, and standing for 18-24 h to obtain special slurry with the viscosity of 38-45 s and the sand content of less than 0.5%, wherein the mass-volume ratio of the slurry water injected into the protective cylinder to the polymer slurry is 1: 0.8-1.1, wherein the molecular weight of the adopted polymer slurry is 3000-3500 ten thousand;
s4: drilling to form a hole: after the preparation of the special slurry in the pile casing is finished, drilling is started by using a rotary drilling rig, during the drilling process, slurry water is added into the pile casing through a water pump, slurry polymers are uniformly scattered on the water flow sprayed into the pile casing according to the proportion in the step S3, under the action that the drilling speed is kept at 8-10 m/h, a drill rod of the rotary drilling rig is used for stirring, the slurry is always kept in a stirring state until the drilling is carried out to a position 3-5 m away from the bottom of a designed pile foundation, the slurry water and the polymer slurry are stopped being added, finally, the drilling construction is finished, and the sediment thickness of the drilled hole is detected;
s5: hoisting a steel reinforcement cage and constructing concrete: after the drilling inspection is qualified, hoisting the steel reinforcement cage and the guide pipe, and inspecting the thickness of the sediment again, and performing concrete construction after the drilling inspection is qualified;
s6: pile forming: and (4) after the concrete is poured, pulling out the guide pipe, pulling out the pile casing before the concrete is initially set, and solidifying the concrete to finish the pile foundation construction.
2. The method for constructing a mud retaining wall for a pile foundation in a complex stratum according to claim 1, wherein in step S1, the size of the clean water tank is 3-5 x 2.5m3。
3. The method for constructing a mud retaining wall for a pile foundation in a complex stratum according to claim 1, wherein in step S1, the alkaline substance is dissolved in a water tank filled with tap water before being added to obtain an alkaline solution, and the alkaline solution is added to the clean water tank.
4. The construction method of the mud retaining wall of the pile foundation in the complex stratum according to claim 1, wherein in the step S3, the polymer mud is prepared from hydrolyzed polyacrylamide, CMC, cationic polyacrylamide and vegetable gum according to a mass ratio of 1: 2-4: 5-10: 1-3, and mixing.
5. The construction method of the mud retaining wall of the pile foundation in the complex stratum as claimed in claim 1, wherein in step S4, the thickness of the sediment is not more than 5cm when the sediment is qualified, and if the sediment is not qualified, the hole is cleaned by adopting a slurry changing method until the thickness of the sediment is qualified; in step S5, the thickness of the sediment is not more than 20cm when the sediment is qualified.
6. The method for constructing a mud retaining wall for a pile foundation in a complex stratum according to claim 1, wherein in the step S5, the mud is recycled to the clean water basin for recycling when the concrete is poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321318.8A CN108505514B (en) | 2018-04-11 | 2018-04-11 | Construction method of mud retaining wall of pile foundation in complex stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321318.8A CN108505514B (en) | 2018-04-11 | 2018-04-11 | Construction method of mud retaining wall of pile foundation in complex stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108505514A CN108505514A (en) | 2018-09-07 |
| CN108505514B true CN108505514B (en) | 2020-08-07 |
Family
ID=63381524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810321318.8A Active CN108505514B (en) | 2018-04-11 | 2018-04-11 | Construction method of mud retaining wall of pile foundation in complex stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108505514B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679596A (en) * | 2018-12-14 | 2019-04-26 | 沈阳建筑大学 | A kind of application method of the slurry coat method with magnetosensitive thickening power |
| CN110029660A (en) * | 2019-02-15 | 2019-07-19 | 中科兴创（北京）科技有限公司 | The construction technology of polymer mud retaining wall is used in a kind of rotary drilling rig work progress |
| CN110159186A (en) * | 2019-05-24 | 2019-08-23 | 中国建筑第五工程局有限公司 | Slurry drilled pile drilling construction method |
| CN114059560B (en) * | 2021-12-22 | 2023-04-11 | 瑞洲建设集团有限公司 | Inclined pile construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850249B (en) * | 2014-03-25 | 2015-12-02 | 陕西桩鑫建设工程有限公司 | Long spire is squeezed into rock filling pile construction technology |
| CN106284313B (en) * | 2016-08-25 | 2017-09-22 | 陕西桩鑫建设工程有限公司 | Long spire based on circulating mud retaining wall is squeezed into rock filling pile construction method |
| CN107382128B (en) * | 2017-08-09 | 2020-03-17 | 安徽中铁工程材料科技有限公司 | Anti-collapse polymer slurry powder and preparation method and application thereof |
-
2018
- 2018-04-11 CN CN201810321318.8A patent/CN108505514B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108505514A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108505514B (en) | Construction method of mud retaining wall of pile foundation in complex stratum | |
| CN1193141C (en) | Combined grouting construction process of reinforcing foundation | |
| CN104929114A (en) | High pressure jet grouting pile waterproof curtain construction device and method | |
| CN101413266B (en) | Processing method of interlayer defect injection concrete of drill filling pile | |
| CN101863643B (en) | Hydrophobic gel composite cement and plugging method thereof | |
| CN110965595B (en) | Raft foundation building lifting reinforcement structure and method under corrosive geological environment | |
| CN204753574U (en) | High pressure jet grouting pile stagnant water curtain construction equipment | |
| CN103967507A (en) | Curtain grouting process suitable for water-rich mine underground mining water plugging | |
| CN103937475A (en) | Carbon dioxide acidification blocking remover and process of not reversely discharging raffinate after acidification | |
| CN101614020A (en) | Flexible bladder type anti-corrosive apparatus and use the anticorrosion stake and the job practices of this device | |
| CN104711973A (en) | Construction method for small-diameter pile composite foundation | |
| CN102677630B (en) | Construction method of concrete cut-off wall in sludge soil with high water content | |
| CN1173097C (en) | Impervious wall construction and soilslip-resisting and leakage-blocking process | |
| CN104108919A (en) | Environment-friendly water-stop curtain | |
| CN105178333B (en) | Construction method for removing anchor rod obstacles in grooving process of underground diaphragm wall | |
| CN104005416A (en) | Method for processing major-diameter hole pile collapsed holes under high and steep slope plain fill back-pressing condition | |
| CN109537612A (en) | A kind of porous impact stirring diaphram wall Barrier Technology and its construction method | |
| Ischy et al. | AN INTRODUCTION TO ALLUVIAL GROUTING. | |
| CN104529339A (en) | Polypropylene crosslinking copolymer fiber concrete leaking stoppage paste | |
| CN114183170A (en) | Karst grouting construction method | |
| CN115852944B (en) | Cast-in-place pile construction method adopting chemical slurry to protect wall and form hole | |
| CN111269702B (en) | Tough environment-friendly slurry and preparation method and construction process thereof | |
| CN117569302B (en) | Water injection spiral drilling pore-forming construction method suitable for saline-alkali soil | |
| CN202247864U (en) | Bored pile | |
| CN1059943C (en) | Technology of high pressure jet pouring of badly weathered soft basement rocks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220801 Address after: Hefei City, Anhui Province Zhang Sag Road 230041 No. 106 Patentee after: THE FOURTH ENGINEERING CO., LTD. OF CTCE Group Patentee after: Haoji Railway Co.,Ltd. Address before: Hefei City, Anhui Province Zhang Sag Road 230041 No. 106 Patentee before: THE FOURTH ENGINEERING CO., LTD. OF CTCE Group |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qin Xiuyu Inventor after: Cheng Linmeng Inventor after: Zhou Wei Inventor after: Liu Tao Inventor after: Zhu Chao Inventor after: Wang Jianghong Inventor after: Ma Zhaofei Inventor after: Qu Ping Inventor after: Wang Hui Inventor after: Lu Yujiang Inventor after: Shen Zongbin Inventor after: Zhao Zhikun Inventor before: Qin Xiuyu Inventor before: Wang Jianghong Inventor before: Shen Zongbin Inventor before: Zhao Zhikun Inventor before: Cheng Linmeng Inventor before: Zhou Wei Inventor before: Liu Tao |