CN115324281A - Compacted confined cement column for resource utilization of engineering muck and construction method thereof - Google Patents
Compacted confined cement column for resource utilization of engineering muck and construction method thereof Download PDFInfo
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- CN115324281A CN115324281A CN202211011327.XA CN202211011327A CN115324281A CN 115324281 A CN115324281 A CN 115324281A CN 202211011327 A CN202211011327 A CN 202211011327A CN 115324281 A CN115324281 A CN 115324281A
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- 239000004568 cement Substances 0.000 title claims abstract description 164
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 239000002689 soil Substances 0.000 claims abstract description 157
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 239000002893 slag Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000005056 compaction Methods 0.000 claims description 22
- 239000011083 cement mortar Substances 0.000 claims description 16
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 12
- 239000004917 carbon fiber Substances 0.000 claims description 12
- 239000003365 glass fiber Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 34
- 239000011151 fibre-reinforced plastic Substances 0.000 abstract description 34
- 230000006835 compression Effects 0.000 abstract description 14
- 238000007906 compression Methods 0.000 abstract description 14
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 239000003733 fiber-reinforced composite Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000004567 concrete Substances 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- 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
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a compacted confined cement soil column for resource utilization of engineering muck and a construction method thereof. The cement soil column comprises cement soil and a steel pipe or a fiber reinforced composite (FRP) pipe. According to the invention, the cement soil is combined with the steel pipe or the Fiber Reinforced Plastic (FRP) pipe, the steel pipe or the FRP pipe provides peripheral transverse constraint for the cement soil, and the cement soil in the pipe is compacted to form a compacted constraint cement soil column member, so that the compression mechanical property of the engineering slag soil is greatly improved, and a new path is developed for the efficient resource utilization of the engineering slag soil.
Description
Technical Field
The invention relates to the technical field of engineering waste recycling, in particular to a compacted confined cement soil column for engineering muck resource utilization and a construction method thereof.
Background
Along with the rapid development of urban construction in China in recent years, more than 35 hundred million tons of construction waste are generated every year, which causes harm to the environment, wherein the engineering residual soil accounts for more than 70% of the total amount of the construction waste. The engineering muck is mainly waste soil generated in underground engineering or basic engineering. At present, the resource utilization rate of the engineering muck in China is only less than 5 percent, and meanwhile, the resource utilization rate of the engineering muck in developed countries reaches more than 90 percent. The disposal modes of the engineering muck in China mainly comprise low-lying land filling, foundation backfilling, pit backfilling, land reclamation by surrounding sea and the like, and large-scale engineering muck discharge depends on remote disposal to a great extent for constructing cities with large scale. With the increasing ecological environment protection requirement, the traditional extensive engineering muck disposal mode cannot adapt to the sustainable development of cities in China. How to promote the recycling of engineering muck resources becomes a new subject for examining the urban treatment capability and the treatment level in the rapid development period of modern cities.
Steel or Fiber Reinforced Plastic (FRP) is widely used as a constraint or structural material in civil engineering by virtue of its excellent properties of light weight and high strength. At present, in practical engineering, a steel pipe concrete structure and a Fiber Reinforced Plastic (FRP) constrained concrete structure are applied more, and concrete is constrained, so that the bearing capacity and the ductility of the concrete can be improved.
The soil cement is a material prepared by mixing soil, cement, water and other components according to a proper proportion, stirring and hardening. Cement soil is a mixed engineering material, and the mechanical property of the cement soil is between that of soil and concrete. The cement soil can be used as a base material under asphalt concrete and cement concrete pavements, and engineering materials such as slope reinforcement of dams and embankments, liners of grooves-reservoirs-shallow lakes, large-volume water soil embankment, foundation stabilization, pavement bases, slope reinforcement, impermeable linings and the like. The cement soil has the advantages of local material utilization, reduced transportation, convenient construction, low cost, and remarkable economic benefit due to the mass popularization and application of the cement soil technology.
The traditional steel tube or FRP tube confined concrete column needs to consume a large amount of resources such as sand, cement and the like, carbon dioxide discharged by the building material for manufacturing cement accounts for 7% of the global carbon dioxide discharge, china covers nearly half of the global cement production and the carbon discharge in cement production, and great pressure is brought to China to achieve the aim of 'double carbon'. The mechanical property of the traditional cement soil which is not compacted and has no transverse constraint is poor, the unconfined compressive strength is only 0.3-2.0 MPa, and the unconfined compressive strength greatly depends on the mixing amount of cement, so that great limitation and constraint are caused to the application of cement soil (Wangzuan, research on horizontal bearing characteristics of large-diameter cement soil composite steel pipe piles, [ D ], southeast university, 2021.). Therefore, a new method is needed to solve the problems that the compressive strength of cement in the existing engineering is obviously lower, the cement consumption is relatively higher, and the like.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a compacted confined cement column for efficient resource utilization of engineering muck and a construction method thereof.
According to the invention, the cement soil is combined with the steel pipe or the Fiber Reinforced Plastic (FRP) pipe, the steel pipe or the FRP pipe provides transverse restraint for the cement soil, and the cement soil in the pipe is compacted to form a compacted restrained cement soil column member, so that the compression mechanical property of the engineering muck is greatly improved, and a new path is opened for efficient resource utilization of the engineering muck.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme.
The invention provides a compacted confined cement soil column for resource utilization of engineering muck, which comprises cement soil and a steel pipe or a Fiber Reinforced Polymer (FRP) pipe, wherein the cement soil comprises the following raw materials in parts by weight:
100-140 parts of engineering slag soil after the water content is deducted;
0-15 parts of cement;
0-25 parts of water (including water contained in the engineering slag soil);
the cement soil is positioned in the steel pipe or the FRP pipe, and the cement soil in the pipe is compacted to form a compacted constraint cement soil column component.
Further, the engineering muck is waste soil generated in underground engineering or basic engineering.
Further, the cross-sectional shape of the steel pipe or the FRP pipe is circular, rectangular or other polygonal shape.
Further, the soil cement may be doped or doped with one or more kinds of fibers such as chopped steel fibers, basalt fibers, carbon fibers, glass fibers, and synthetic fibers. When the fiber is added, the adding amount is 0.55-50 kg/m 3 。
Furthermore, the cement column also comprises high-strength cement mortar, the compressive strength of the high-strength cement mortar ranges from 30MPa to 100MPa, the high-strength cement mortar is positioned in a gap between the upper surface of the cement soil and the upper end opening of the steel pipe or the FRP pipe, and the thickness of the high-strength cement mortar is 0-10 mm.
Further, the compaction treatment is to apply vertical pressure to the cement soil in the pipe by using pressure equipment to compact the cement soil, wherein the diameter of a pressure head of the pressure equipment is 5-10 mm smaller than the inner diameter of the steel pipe or the FRP pipe.
The invention provides a construction method of a compacted pipe confined cement soil column for resource utilization of engineering muck, which comprises the following steps:
(1) Placing engineering muck, cement and water in parts by weight into a stirrer, and fully stirring and mixing to obtain cement soil;
(2) Filling cement soil into the steel pipe or the FRP pipe until the cement soil is flush with the upper end opening of the steel pipe or the FRP pipe;
(3) Applying vertical pressure to the soil cement in the pipe by using a pressure device to compact the soil cement;
(4) The height of the cement soil in the pipe is reduced after compaction, the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated until the distance between the upper surface of the compacted cement soil and the upper end opening of the steel pipe or the FRP pipe is not more than 10mm
(5) And finally, sealing and leveling by adopting high-strength cement mortar.
Further, the pressure range of the vertical pressure applied in the step (3) is 20MPa to 45MPa.
Further, in the step (3), in the process of applying vertical pressure to the cement soil in the pipe by using pressure equipment, the transverse strain of the steel pipe is less than the yield strain of steel, and the transverse strain of the FRP pipe does not exceed 80% of the limit strain of the FRP.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) In the invention, the main material is the engineering muck which has large engineering output and is difficult to dispose, compared with the traditional engineering muck treatment mode, the resource utilization rate of the engineering muck is greatly improved, the application field of the engineering muck is widened, a new thought is provided for the resource utilization of the engineering muck, and remarkable economic benefit and social benefit can be generated.
(2) Compared with traditional FRP (fiber reinforced plastic) confined concrete or steel pipe concrete, the invention adopts compacted cement soil to directly replace concrete, greatly reduces the consumption of resources such as sand, stone, cement and the like, can relieve the predicament of shortage of natural gravels and the pressure of the produced cement on the environment, and is highly in accordance with the green development concept.
(3) The steel pipe or the FRP pipe is combined with the cement soil, and the steel pipe or the FRP pipe provides effective transverse restraint effect for the cement soil, so that the compaction treatment of the cement soil is realized, the compression mechanical property of the cement soil is greatly improved compared with the cement soil which is not compacted, and the application range of the cement soil is greatly expanded.
Drawings
FIG. 1 is a schematic view of the overall structure of a compacted cementitious column;
FIG. 2 is a schematic cross-sectional view of a compacted cementitious column;
FIG. 3 is a schematic longitudinal cross-section of a compacted cementitious column;
wherein: 1-compacted cement soil; 2-steel or FRP pipe; 3-high strength cement mortar.
Detailed Description
The embodiments of the present invention will be further described with reference to the drawings and specific examples, but the embodiments of the present invention are not limited thereto. It is noted that the following processes or parameters, if not specified in particular detail, are understood or implemented by those skilled in the art with reference to the prior art.
The engineering muck used in the embodiment of the invention is granite weathered soil taken from a foundation pit of a second-stage project of a No. seven-line Rough post station of track traffic in Guangzhou city, and the granite weathered soil is very common engineering muck in the engineering construction process of Guangdong region.
Example 1
This example prepares a compacted type confined cement column, whose overall structure is shown in fig. 1 (left), cross-sectional view in transverse section is shown in fig. 2 (left), cross-sectional view in longitudinal section is shown in fig. 3, in which 1-compacted cement soil; 2-steel or FRP pipe; 3-high strength cement mortar.
In this embodiment, the cement soil comprises the following raw materials in parts by mass:
100 parts of engineering slag soil after the water content is deducted;
15 parts of cement;
25 parts of water (including moisture contained in engineering slag soil);
the restriction of the peripheral pipe of cement soil in this embodiment adopts the circular seamless steel pipe of Q235, and the steel pipe external diameter is 325mm, and the wall thickness is 6mm, and is highly 900mm.
The pressure equipment used in the compaction process in this example is a reaction frame and a jack, wherein the diameter of the pressure head is 5mm smaller than the inner diameter of the steel pipe.
The specific construction method of the embodiment comprises the following steps:
(1) Taking 110kg of engineering slag soil after the moisture content is deducted, 16.5kg of cement, 27.5kg of water (including the moisture content of the engineering slag soil) and 3.3kg of chopped steel fibers, and putting the materials into a stirrer to be fully stirred and mixed to obtain cement soil;
(2) Filling cement soil into the steel pipe until the cement soil is flush with the upper opening of the steel pipe;
(3) Applying vertical pressure to the cement soil in the pipe by using a reaction frame and a jack, wherein the applied pressure is 30MPa;
(4) The height of the cement soil in the pipe is reduced after compaction, the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated, and after the last compaction is finished, the distance between the upper surface of the compacted cement soil and the upper end opening of the steel pipe is 5mm;
(5) And finally, sealing and leveling by adopting high-strength cement mortar with the compressive strength of 40 MPa.
In the process of applying vertical pressure to the cement soil in the pipe by using the reaction frame and the jack, the maximum transverse strain of the steel pipe is 70% of the yield strain of Q235 steel.
When the compacted type confined cement soil column manufactured by the embodiment reaches 28 days of age, the compression resistance bearing capacity is detected, the compression resistance bearing capacity is measured to reach more than 2800kN, and the compression mechanical property of the compacted type confined cement soil column is greatly improved compared with that of cement soil which is not compacted and has no transverse confinement.
Example 2
This example prepares a compacted type confined cement column, whose overall structure is shown in fig. 1 (left), cross-sectional view in transverse section is shown in fig. 2 (left), cross-sectional view in longitudinal section is shown in fig. 3, in which 1-compacted cement soil; 2-steel pipes or FRP pipes; 3-high strength cement mortar.
In this embodiment, the cement soil comprises the following raw materials in parts by mass:
130 parts of engineering slag soil after the water content is deducted;
4 parts of cement;
6 parts of water (including moisture contained in engineering slag soil);
in this embodiment, the cement peripheral pipe is constrained by a circular glass fiber pipe (the glass fiber pipe is one of the FRP pipes), the outer diameter of the glass fiber pipe is 350mm, the wall thickness is 6mm, and the height is 900mm.
The pressure equipment used in the compaction process in this example was a reaction frame and jack, where the diameter of the head was 7mm smaller than the inner diameter of the glass fiber tube.
The specific construction method of the embodiment comprises the following steps:
(1) Taking 162.5kg of engineering residue soil after the moisture content is deducted, 5kg of cement and 7.5kg of water (including the moisture content of the engineering residue soil), and putting the materials into a stirrer to be fully stirred and mixed to obtain cement soil (the embodiment is not doped with fibers);
(2) Filling cement soil into the glass fiber tube until the cement soil is flush with the upper end opening of the glass fiber tube;
(3) Applying vertical pressure to the cement soil in the pipe by using a reaction frame and a jack, wherein the applied pressure is 25MPa;
(4) The height of the cement soil in the pipe is reduced after the compaction, the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated, and after the last compaction is finished, the distance between the upper surface of the compacted cement soil and the upper end opening of the glass fiber pipe is 10mm
(5) And finally, sealing and leveling by adopting high-strength cement mortar with the compressive strength of 30 MPa.
When a reaction frame and a jack are used for applying vertical pressure to the cement soil in the pipe, the maximum transverse strain of the glass fiber pipe is 50% of the ultimate strain of the pipe.
When the compacted type confined cement soil column manufactured by the embodiment reaches 28 days of age, the compression resistance bearing capacity is detected, the compression resistance bearing capacity is measured to reach more than 2500kN, and the compression mechanical property of the compacted type confined cement soil column is greatly improved compared with that of cement soil which is not compacted and has no lateral confinement.
Example 3
This example prepares a compacted confined cement column, which has the overall structure shown in fig. 1 (right), the cross-sectional view in the transverse direction shown in fig. 2 (right), and the cross-sectional view in the longitudinal direction shown in fig. 3, wherein 1-compacted soil cement is obtained; 2-steel pipe or FRP pipe 3-high strength cement mortar.
In this embodiment, the cement soil comprises the following raw materials in parts by mass:
120 parts of engineering slag soil after the water content is deducted;
5 parts of cement;
15 parts of water (including moisture contained in engineering slag soil);
in this embodiment, the cement peripheral pipe is constrained by a square carbon fiber pipe (the carbon fiber pipe is one of the FRP pipes), the side length of the carbon fiber pipe is 300mm, the wall thickness of the pipe is 5mm, and the height of the carbon fiber pipe is 900mm.
The pressure equipment used in the compaction treatment in this embodiment is a reaction frame and a jack, wherein the side length of the square pressure head is 6mm smaller than that of the carbon fiber tube.
The specific construction method of the embodiment comprises the following steps:
(1) Taking 132kg of engineering residue soil after the moisture content is removed, 5.5kg of cement and 16.5kg of water (including the moisture content of the engineering residue soil), and putting the materials into a stirrer to be fully stirred and mixed to obtain cement soil (the embodiment is not doped with fibers);
(2) Filling cement soil into the carbon fiber pipe until the cement soil is flush with the upper end opening of the carbon fiber pipe;
(3) Applying vertical pressure to the cement soil in the pipe by using a reaction frame and a jack, wherein the applied pressure is 40MPa;
(4) The height of the cement soil in the pipe is reduced after compaction, the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated, and after the last compaction is finished, the distance between the upper surface of the compacted cement soil and the opening at the upper end of the carbon fiber pipe is 8mm;
(5) And finally, sealing and leveling by adopting high-strength cement mortar with the compressive strength of 55 MPa.
In the process of applying vertical pressure to the cement soil in the pipe by using the reaction frame and the jack, the maximum transverse strain of the carbon fiber pipe is 60 percent of the limit strain of the pipe.
When the compacted type confined cement soil column manufactured by the embodiment reaches 28 days of age, the compression resistance bearing capacity is detected, the compression resistance bearing capacity is measured to be more than 4000kN, and the compression mechanical property of the compacted type confined cement soil column is greatly improved compared with that of cement soil which is not compacted and has no lateral confinement.
Example 4
This example prepares a compacted type confined cement column, whose overall structure is shown in fig. 1 (right), cross-sectional view in transverse section is shown in fig. 2 (right), cross-sectional view in longitudinal section is shown in fig. 3, in which 1-compacted cement soil; 2-steel or FRP pipe; 3-high strength cement mortar.
In this embodiment, the soil cement comprises the following raw materials in parts by mass:
120 parts of engineering slag soil after the water content is deducted;
8 parts of cement;
12 parts of water (including moisture contained in engineering slag soil);
in the embodiment, the peripheral pipe of the cement-soil cylinder is constrained by a Q345B square seamless steel pipe, the outer side length of the steel pipe is 300mm, the wall thickness of the steel pipe is 8mm, and the height of the steel pipe is 900mm.
The pressure equipment used in the compaction treatment in this embodiment is a reaction frame and a jack, wherein the side length of the square pressure head is 8mm shorter than the inner side length of the steel pipe.
The specific construction method of the embodiment comprises the following steps:
(1) Taking 132kg of engineering residue soil after the moisture content is deducted, 8.8kg of cement, 13.2kg of water (including the moisture content of the engineering residue soil) and 0.33kg of glass fiber, and putting the materials into a stirrer to be fully stirred and mixed to obtain cement soil;
(2) Filling cement soil into the steel pipe until the cement soil is flush with the upper opening of the steel pipe;
(3) Applying vertical pressure to the cement soil in the pipe by using a reaction frame and a jack, wherein the applied pressure is 45MPa;
(4) The height of the cement soil in the pipe is reduced after compaction, the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated, and after the last compaction is finished, the distance between the upper surface of the compacted cement soil and the upper end opening of the steel pipe is 7mm;
(5) And finally, sealing and leveling by adopting high-strength cement mortar with the compressive strength of 60 MPa.
And in the process of applying vertical pressure to the cement soil in the pipe by using the reaction frame and the jack, the maximum transverse strain of the steel pipe is 85 percent of steel yield strain.
When the compacted type confined cement soil column manufactured by the embodiment reaches the age of 28 days, the compression resistance bearing capacity is detected to reach over 4500kN, and the compression mechanical property of the compacted type confined cement soil column is greatly improved compared with that of cement soil which is not compacted and has no lateral confinement.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (10)
1. A compacted confined cement column for resource utilization of engineering muck is characterized by comprising cement soil and a steel pipe or an FRP pipe; the cement soil comprises the following raw materials in parts by weight:
100-140 parts of engineering slag soil after the water content is deducted;
0-15 parts of cement;
0-25 parts of water;
wherein the water comprises water contained in the engineering muck; the cement soil is positioned in the steel pipe or the FRP pipe, and the cement soil in the pipe is compacted to form a compacted type confined cement soil column member.
2. The compacted confined cement soil column for resource utilization of engineering muck as claimed in claim 1, wherein the engineering muck is waste soil generated in underground engineering or foundation engineering.
3. The compacted confined cement column for resource utilization of engineering muck as claimed in claim 1, wherein the cross-sectional shape of the steel tube or FRP tube is circular, rectangular or other polygonal shape.
4. The compacted confined cement soil column for resource utilization of engineering muck as claimed in claim 1, wherein chopped steel fibers, basalt fibers, carbon fibers, glass fibers or synthetic fibers are doped in the cement soil, and the doping amount of the fibers is 0.55-50 kg/m 3 。
5. The compacted confined cement column for resource utilization of engineering muck as claimed in claim 1, wherein short steel fibers, basalt fibers, carbon fibers, glass fibers or synthetic fibers are not added in the cement soil.
6. The compacted confined cement column for resource utilization of engineering muck as claimed in claim 1, wherein the column further comprises high-strength cement mortar, the compressive strength of the column is 30MPa to 100MPa, the column is located in a gap between the upper surface of the cement soil and the upper end opening of the steel pipe or FRP pipe, and the column has a thickness of 0mm to 10mm.
7. The compacted confined cement soil column for resource utilization of engineering muck as claimed in claim 1, wherein the compacting treatment is to apply vertical pressure to the cement soil in the pipe by using a pressure device to compact the cement soil, wherein the head diameter of the pressure device is 5-10 mm smaller than the inner diameter of the steel pipe or FRP pipe.
8. The construction method of the compacted confined cement soil column for resource utilization of the engineering muck as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) Placing engineering muck, cement and water in parts by weight into a stirrer, and fully stirring and mixing to obtain cement soil;
(2) Filling cement soil into the steel pipe or the FRP pipe until the cement soil is flush with the upper end opening of the steel pipe or the FRP pipe;
(3) Applying vertical pressure to the soil cement in the pipe by using a pressure device to compact the soil cement;
(4) The height of the cement soil in the pipe is reduced after compaction, and the filling and compaction operations of the cement soil in the steps (2) and (3) are repeated until the distance between the upper surface of the compacted cement soil and the upper end opening of the steel pipe or the FRP pipe is not more than 10mm;
(5) And finally, sealing and leveling by adopting high-strength cement mortar.
9. The construction method of the compacted confined cement column for resource utilization of engineering muck as claimed in claim 8, wherein the range of the pressure for applying the vertical pressure in the step (3) is 20MPa to 45MPa.
10. The construction method of the compacted confined cement soil column for resource utilization of the engineering muck as claimed in claim 8, wherein in the step (3) of applying vertical pressure to the cement soil in the tube by using pressure equipment, the transverse strain of the steel tube is less than the yield strain of steel, and the transverse strain of the FRP tube is not more than 80% of the limit strain of FRP.
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| CN202211011327.XA CN115324281A (en) | 2022-08-22 | 2022-08-22 | Compacted confined cement column for resource utilization of engineering muck and construction method thereof |
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| CN (1) | CN115324281A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006032033A2 (en) * | 2004-09-15 | 2006-03-23 | University Of Utah Research Foundation | Shape modification and reinforcement of columns confined with frp composites |
| CN101899828A (en) * | 2010-04-27 | 2010-12-01 | 河海大学 | Construction method of bagged rammed small-diameter soil-cement pile composite foundation |
| CN104141304A (en) * | 2014-08-06 | 2014-11-12 | 冠鲁建设股份有限公司 | Extrusion formed precast pile stiffness core and cement soil combined Y-shaped pile and construction method thereof |
| CN105421587A (en) * | 2015-12-14 | 2016-03-23 | 广州大学 | Sand filling steel pipe composite component and manufacturing method thereof |
| CN105839620A (en) * | 2016-03-29 | 2016-08-10 | 中铁时代建筑设计院有限公司 | Plastic-sleeve bamboo-reinforcement cemented soil pile and construction method thereof |
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
| CN113445516A (en) * | 2021-07-28 | 2021-09-28 | 深圳市金量建设科技有限公司 | Drilling and pouring type cement soil pile and construction method thereof |
-
2022
- 2022-08-22 CN CN202211011327.XA patent/CN115324281A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006032033A2 (en) * | 2004-09-15 | 2006-03-23 | University Of Utah Research Foundation | Shape modification and reinforcement of columns confined with frp composites |
| CN101899828A (en) * | 2010-04-27 | 2010-12-01 | 河海大学 | Construction method of bagged rammed small-diameter soil-cement pile composite foundation |
| CN104141304A (en) * | 2014-08-06 | 2014-11-12 | 冠鲁建设股份有限公司 | Extrusion formed precast pile stiffness core and cement soil combined Y-shaped pile and construction method thereof |
| CN105421587A (en) * | 2015-12-14 | 2016-03-23 | 广州大学 | Sand filling steel pipe composite component and manufacturing method thereof |
| CN105839620A (en) * | 2016-03-29 | 2016-08-10 | 中铁时代建筑设计院有限公司 | Plastic-sleeve bamboo-reinforcement cemented soil pile and construction method thereof |
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
| CN113445516A (en) * | 2021-07-28 | 2021-09-28 | 深圳市金量建设科技有限公司 | Drilling and pouring type cement soil pile and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 代国忠、顾欢达: "《土力学与基础工程》", 重庆大学出版社, pages: 410 - 411 * |
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