CN114277762A - Foundation treatment method for vibration control of power machine foundation - Google Patents
Foundation treatment method for vibration control of power machine foundation Download PDFInfo
- Publication number
- CN114277762A CN114277762A CN202111638980.4A CN202111638980A CN114277762A CN 114277762 A CN114277762 A CN 114277762A CN 202111638980 A CN202111638980 A CN 202111638980A CN 114277762 A CN114277762 A CN 114277762A
- Authority
- CN
- China
- Prior art keywords
- foundation
- cement
- soil
- rolling
- replacement
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 86
- 239000002689 soil Substances 0.000 claims abstract description 226
- 239000004568 cement Substances 0.000 claims abstract description 199
- 238000005096 rolling process Methods 0.000 claims abstract description 95
- 238000010276 construction Methods 0.000 claims abstract description 76
- 238000011049 filling Methods 0.000 claims abstract description 67
- 238000002156 mixing Methods 0.000 claims abstract description 54
- 238000005056 compaction Methods 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 45
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000007689 inspection Methods 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 74
- 239000010410 layer Substances 0.000 claims description 41
- 238000013461 design Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 13
- 238000003892 spreading Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 230000007480 spreading Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 6
- 239000002985 plastic film Substances 0.000 claims description 6
- 229920006255 plastic film Polymers 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000007373 indentation Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009964 serging Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a foundation treatment method for vibration control of a power machine foundation, which comprises the steps of firstly, simulating foundation dynamic characteristic test, drawing up a foundation treatment scheme of' rolling cemented soil replacement and filling + tamping and expanding pile locking, designing foundation treatment parameters, then carrying out material preparation, indoor compaction tests, field rolling tests and other construction process tests, carrying out replacement and filling preparation work, carrying out mixing and transportation, layering and paving, rolling and quality inspection of cemented soil until the total designed thickness of a replacement and filling area is reached, carrying out maintenance, and finally adopting tamping and expanding pile locking along the periphery of the replacement and filling area. The invention improves the performance of soil by means of cement, reduces the deformation of the foundation, improves the bearing capacity of the foundation, effectively controls the settlement of the foundation, ensures the safe operation of a power machine, and has the advantages of simple, convenient, efficient and rapid construction, strong quality controllability and obvious economic benefit.
Description
Technical Field
The invention belongs to the technical field of foundation construction of constructional engineering, and particularly relates to a foundation treatment method for vibration control of a power machine foundation.
Background
With the rapid development of industrial technology, machine equipment is continuously updated, and large-tonnage, high-rotation-speed and high-power machines, such as large-capacity or ultrahigh-pressure compressors, high-rotation-speed turbines, high-precision instruments and meters, precision machine tools and the like, are more and more commonly applied. Any power machine requires a stable foundation and a secure and reliable foundation to support. When the power machine equipment foundation is designed, the vibration of the foundation needs to be controlled within an allowable range.
When a large power machine normally runs, unbalanced disturbance force generated by the action of power load enables the machine to vibrate, so that vibration of a foundation is caused, a large part of energy is transmitted into the foundation, so that the movement of the surface of the foundation is caused, the deformation of the foundation is caused, and the bearing capacity of the foundation is reduced, and even additional settlement is increased. The deformation of the foundation can be transmitted to the upper power machine to respond, the foundation, the upper power machine form a complex vibration system, and finally the damping and natural vibration period of the whole structure is acted, so that the normal operation of the machine is influenced, the machine parts are easy to wear, the operating conditions of workers are deteriorated, and the physical and psychological health and the working efficiency of the workers are influenced. Meanwhile, excessive vibration is transmitted to nearby houses through the foundation, so that normal work and life of people are disturbed, and the precision machine tool and instruments cannot be normally used.
Theoretical research and experiments show that the influence factors of the basic vibration of the power machine are mainly the dynamic characteristics of the basic vibration and the dynamic characteristics of the foundation, and are also related to the structural form and the size of the machine foundation. The basis weight is not the only factor controlling the vibration, and the basis footprint and burial depth, as well as the dynamic characteristics of the foundation, also have a significant effect on the vibration. Therefore, the power response processing on the foundation of the power machine foundation is an important content for controlling the vibration of the foundation of the power machine, and has very important practical significance.
Disclosure of Invention
The present invention addresses the above-described needs by providing a method of treating a foundation for vibration control of a power machine foundation.
In order to achieve the purpose, the invention adopts the following technical scheme: a foundation treatment method for vibration control of a power machine foundation, characterized by: the method comprises the following steps:
s1) drawing up a foundation treatment scheme, designing foundation treatment parameters:
combining the operating frequency characteristic of a power machine and the displacement characteristic of a power machine foundation, developing a foundation treatment scheme of rolling cement soil replacement and tamping and expanding pile locking by developing a simulated foundation dynamic characteristic test, and designing replacement fillers, a mixing ratio, a total foundation treatment thickness T, a compaction coefficient k and an optimal water content WOP for foundation treatment;
s2) material preparation and construction process test:
selecting cement soil as a filling material, adopting bulk composite portland cement as cement in the cement soil, taking qualified soil materials, adding the cement according to a mixing ratio designed by foundation treatment after screening, mechanically stirring the cement uniformly into cement, adopting an electric compaction instrument to carry out compaction test, drawing a water content-dry density compaction curve of the cement soil, analyzing and determining the optimal water content WOP and the corresponding maximum dry density rho of the cement soil, developing a field rolling construction process test according to parameters obtained by an indoor compaction test, and further verifying and determining construction control parameters: rolling machine and spreading thickness t0Rolling, compacting by a compacting machine, and rolling to a thickness t1A compaction coefficient k, an optimal moisture content WOP and a maximum dry density rho;
s3) refill preparation work;
the foundation pit excavation of the site foundation treatment replacement area is carried out while material preparation and construction process tests are carried out, before replacement and filling, the underground water level is firstly reduced to 500mm below the elevation of the bottom surface of the foundation pit of the replacement and filling area to ensure that no accumulated water exists in the foundation pit, the bottom surface of the foundation pit of the replacement and filling area is leveled, all weak interlayers, silt, floating soil and sundries are thoroughly removed, the water content is appropriate through water exposure or airing, a groove is tested on site, and the elevation of the bottom surface of the foundation pit of the replacement and filling area is retested;
s4) mixing and transporting cement soil:
calculating the cement mixing amount according to the earthwork amount of the replacement and filling area, adding cement into soil materials in batches, and mixing to form cement soil;
s5) paving and rolling cement soil:
adopting an advancing occupying method to carry out along the direction of a foundation pit, filling by a leveling method, paving cement soil by a loader and a bulldozer, leveling by a grader and a frog rammer, immediately adopting a low-frequency high-amplitude vibratory roller and a bump vibratory roller to start rolling, wherein the rolling mode is parallel to the axial direction, carrying out back-and-forth full-vibration staggered rolling by an advancing and retreating full-vibration staggered method, and carrying out back-and-forth adjacent staggered rolling from the outer side to the inner side;
s6) quality inspection:
measuring the sedimentation amount with a level gauge by using a square grid method, and checking the rolling thickness t1Whether the design requirement is met or not, the excessive or insufficient parts are adjusted in a manual matching mode, the dry density of the cement soil is detected by a cutting ring method, and the cutting ring sampling depth is the rolling forming thickness t 11/3, calculating average dry density according to a plurality of measuring points, comparing the average dry density with the maximum dry density rho corresponding to the optimal moisture content WOP, determining whether the compaction coefficient k meets the designed foundation treatment requirement, continuing rolling until the compaction coefficient does not meet the designed foundation treatment requirement, and tracking and detecting the moisture content of the cement soil by adopting an alcohol burning loss method and an oven method on site;
s7) repeating the previous layer of cement soil construction:
paving and rolling a layer of cement soil, and repeating the steps S3, S4 and S5 after the quality of the cement soil is qualified, and performing uninterrupted construction on the previous layer of cement soil from bottom to top until the construction of each layer within the total thickness T of the foundation treatment is completed;
s8) replacement and filling area maintenance:
after all the cement soil in the replacement and filling area is rolled and replaced, geotextile, plastic film or straw bag is adopted for heat preservation and covering, and watering maintenance is carried out for not less than 7 days;
s9) carrying out side locking construction on the rammed and expanded pile:
adopting cement gravel soil to tamp and expand a pile to lock the edge along the periphery of the replacement filling area, aligning and forming a hole to the designed depth by using a pile machine, tamping by using a heavy hammer, then filling cement gravel soil stones into the pile hole, and continuously tamping and expanding the area with the depth of 800-1200 mm at the lower part of the pile to form an expanded head on the pile body, so that the continuity and compactness of the pile body are ensured;
s10) evaluating foundation treatment:
after the border locking construction of the tamping-expanding pile in the whole replacement and filling area is completed, the bearing capacity and compressibility of the cement soil foundation are measured by using a bearing capacity tester, the foundation treatment is evaluated, and whether the design requirement of the foundation treatment is met or not is verified.
According to the scheme, the cement is added with soil materials and mixed in the step S4), a road mixing method and a gridding paving construction are adopted, or a plant mixing method is adopted in large-scale power machine foundation treatment construction, and a mixer is selected to mix the cement with water.
According to the scheme, the water content of the cement soil is checked in time in the mixing process in the step S4), and the water content is controlled to be-2% to + 3% of the optimal water content WOP.
According to the scheme, in the rolling and segmented construction in the step S5), the joint of two adjacent segments is cut into a slope shape or a tooth ridge shape, the slope is not steeper than 1: 3, the joint positions are mutually overlapped during rolling, the overlapping width is controlled to be 0.3-0.5 m, and the working procedures of two adjacent segments of paving and rolling are simultaneously carried out.
According to the scheme, the cement soil is paved within 2h in the step S5), and the time from mixing to compaction is controlled within 4 h.
According to the scheme, the dry density detection in the step S6) is carried out by adopting a sand filling method or a nuclear density instrument, and then the dry density detection is compared and checked with a cutting ring method.
According to the scheme, the quality inspection in the step S7) is completed within 4 hours after the rolling of each layer of cement soil is completed, and the covering of the upper layer of cement soil is completed within 6-8 hours.
The invention has the beneficial effects that: the foundation treatment method for controlling the vibration of the power machine foundation is provided, the foundation treatment technology of 'rolling cement soil replacement and filling + tamping and expanding pile locking edge' is adopted, the difficult problem of controlling the vibration of the power machine foundation is effectively solved, on the premise that the size of the power machine foundation is determined, the performance of soil is improved by means of cement, the deformation of the foundation is reduced, the bearing capacity of the foundation is improved, the foundation settlement is effectively controlled, and the safe operation of the power machine is ensured; the local materials of the soil materials are obtained, the transportation is reduced while the materials are saved, the continuous and large-scale construction can be realized, the construction is simple, convenient, easy, efficient and quick, the cost is low, and the economic benefit is obvious; the foundation treatment method provided by the invention has the advantages that reasonable process measures are made according to the characteristics of high construction condition requirement, multiple working procedures and difficult quality control, the controllability is strong, and the construction quality is easy to guarantee.
Drawings
FIG. 1 is a flow chart of one embodiment of the present invention.
Fig. 2 is a schematic diagram of layered paving and rolling of cemented soil according to an embodiment of the present invention.
Fig. 3 is a schematic plan view of a compressor foundation, a foundation treatment and replacement area, and a rammed pile according to a third embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a compressor foundation, a foundation treatment and replacement area, and a rammed pile according to a third embodiment of the present invention.
Fig. 5 is an enlarged partial cross-sectional view of the rammed pile of fig. 4.
Wherein: 1-foundation pit bottom surface, 2-foundation pit side slope, 3-cement, 4-cement soil, 5-power machine foundation, 6-replacement and filling area, 7-rammed pile, 8-construction channel and 9-cement gravel soil.
Detailed Description
The embodiments of the present invention will now be described with reference to the accompanying drawings, and the present invention is not limited to the following examples.
A foundation treatment method for vibration control of power machine foundation includes such steps as simulating foundation dynamic characteristic test, planning foundation treatment scheme of "rolling and filling with cement soil and tamping and expanding pile to form a foundation, designing foundation treatment parameters, preparing material, indoor compacting test, on-site rolling test, mixing and transporting cement soil, layering and rolling, quality test until the thickness of filling area is reached, curing, and tamping and expanding pile to form a pile.
Example one
As shown in FIG. 1, the foundation treatment method for controlling the vibration of the foundation of the power machine is realized by the following steps:
s01, drawing up foundation treatment scheme and designing foundation treatment parameters
By combining the operating frequency characteristic of a power machine and the displacement characteristic of a power machine foundation 5, a foundation treatment scheme of 'rolling cement soil replacement and filling + tamping and expanding pile locking edge' is drawn up by developing a simulated foundation dynamic characteristic test, and parameters such as filler replacement, mixing ratio, total foundation treatment thickness T, compaction coefficient k, optimal water content WOP and the like of foundation treatment are designed.
S02 preparation and construction process test
Selecting raw materials
And selecting the cement soil 4 as a replacement material. The soil material in the cement soil 4 is selected from cohesive soil or powdery clay, and poor cohesive soil materials containing saline soil, expansive soil, frozen soil, organic matters and the like cannot be used. The water content of the soil material is strictly controlled according to the design requirements of foundation treatment, if the soil material is too wet, the soil material needs to be aired, and if the soil material is too dry, the water needs to be sprayed. The soil material should not have turf, and the large blocks should be crushed and sieved to have particle size of not more than 50 mm. The cement 3 in the cement soil 4 is bulk composite portland cement, the strength grade is determined according to the design requirement of foundation treatment, and the cement soil continuously enters the field according to the same manufacturer, the same grade, the same variety and the same batch number.
Second indoor compaction test
And (3) taking qualified soil, adding cement 3 according to the mixing ratio designed by foundation treatment after screening, mechanically stirring the mixture into cement 4, and performing compaction test by adopting an electric compaction tester to draw a compaction curve of the water content corresponding to the dry density. And analyzing the compaction curve of the cement soil 4, and determining the maximum dry density rho corresponding to the optimal water content WOP of the cement soil 4.
③ in situ Rolling test
According to the parameters obtained by the indoor compaction test, carrying out the rolling construction process test of the on-site cement soil 4, verifying and determining the rolling machinery and the paving material virtual thickness t0Rolling, compacting machine, and forming thickness t after rolling1Construction control parameters such as compactness k, optimal water content WOP, maximum dry density rho and the like. Preferentially selecting test parameters and procedures which meet the design rule of foundation treatment, have good quality, fast progress and are economic and reasonable as the test parameters and proceduresConstruction control parameters and quality control technical requirements for replacement and filling of cement soil 4 in foundation treatment.
S03 filling preparation
Earth excavation
And (3) performing foundation pit excavation in the site foundation treatment and replacement area 6 while material preparation and construction process tests are performed. And (5) performing contour lofting according to the size of the design drawing, and performing slope ratio excavation by adopting machinery. When excavating to 100 ~ 200mm above 1 basic unit's soil in foundation ditch bottom surface, trade the manual work and maintain, clear away silt and broken rock of foundation ditch bottom surface 1, avoid the overexcavation.
② lowering the underground water level
Before replacement and filling, the underground water level is firstly reduced to 500mm below 1 elevation of the bottom surface of the foundation pit in the replacement and filling area 6, so that no accumulated water is in the foundation pit.
Thirdly, cleaning the bottom surface of the foundation pit
And (4) carrying out leveling treatment on the bottom surface 1 of the foundation pit in the replacement and filling area 6, and thoroughly removing all weak interlayers, silt, floating soil and sundries. If the soil of the base layer 1 on the bottom surface of the foundation pit is generally loose and seriously loses water, sprinkling water and statically grinding; and if the water content of the base soil of the bottom surface 1 of the foundation pit is too high and is in a soft plastic state, airing, and performing the next construction after the water content is proper.
Fourthly, concealed acceptance inspection
And (3) inspecting the groove on site, retesting the elevation of the bottom surface 1 of the foundation pit in the replacement and filling area 6, and using a 2m long steel chisel for cuttage to check whether the base soil of the bottom surface 1 of the foundation pit is uniform.
S04, mixing and transporting cement soil
And calculating the mixing amount of the cement 3 according to the earthwork amount of the replacement and filling area 6, adding the cement 3 into soil materials in batches, and mixing to form the cement soil 4.
And (3) adopting a road mixing method and carrying out gridding paving construction. And after the soil material is paved, planning a square grid according to the calculated mixing amount of the cement 3, dividing the paving area corresponding to the cement 3 of 50kg or 100kg into square grid cells, paving and uniformly spraying the cement 3 in the cells of each square grid manually, and rotationally stirring for 4-6 times by using a rotary cultivator until the materials are uniformly mixed and have consistent color and luster, no blank spots, gray strips, gray clusters or flower surfaces, and no plain soil material interlayer.
And in the mixing process, the water content of the cement soil 4 is checked in time, and the water content is controlled to be-2% to + 3% of the optimal water content WOP. If the humidity of the cement soil 4 is too high, airing is carried out; if the humidity of the cement soil 4 is too low, the water is supplemented by a water gun nozzle or a sprinkler.
S05 spreading and rolling cement soil
Paving and leveling cement soil
The filling is carried out along the direction of the foundation pit by adopting a 'filling method' and a 'leveling method', the cement soil 4 is spread by a loader and a bulldozer, and the cement soil is leveled by a leveler and a frog hammer. Before the first layer of paving material, firstly, a layer of cement 3 is spread on the bottom surface 1 of the foundation pit, then the virtual material of cement soil 4 is spread, and the virtual thickness t of the paving material0The thickness is properly increased by 50 to 100 mm. The method comprises the steps of firstly roughly leveling by using a loader and a flat plate vibrator, and then finely leveling for 3-5 times by using a land leveler and a frog hammer according to the sequence of firstly leveling at the periphery and then leveling at the middle. And leveling the corner part by adopting superfilling and manual matching.
Further, the prepared soil cement 4 was completely paved within 2 hours.
② compacting cement soil
And immediately after the cement soil 4 is paved and leveled, a low-frequency high-amplitude vibratory roller and a bump vibratory roller are adopted to start rolling. The rolling mode is parallel to the axis direction, the full-vibration staggered distance method of forward and backward movement is adopted to perform back and forth comprehensive rolling, and the rolling is performed in an adjacent staggered arrangement in a mode of forward and backward movement from the outer side to the inner side. And controlling the vibration rolling frequency of the bump at 8-10 times, carrying out static pressure for 2 times, then carrying out vibration rolling for 4-6 times, and finally carrying out static pressure for 2 times until the surface is flat and has no obvious indentation. The running speed is not more than 2.5km/h during rolling, slow running is suitable when rolling is started, and the track is rolled to be wider than 1/2 mm and not less than 200mm by adopting a track arranging and pressing method. The large construction machines such as bulldozers and excavators cannot turn around, brake suddenly or spin on the rolled cement soil 4, and obvious wheel tracks are avoided.
Furthermore, during sectional construction, the joint of two adjacent sections is cut into a slope shape or a tooth ridge shape, the slope is not steeper than 1: 3, the joint positions are mutually overlapped during rolling, the overlapping width is controlled to be 0.3-0.5 m, and the paving and rolling processes of two adjacent sections are simultaneously carried out.
Furthermore, a small frog hammer is adopted to tamper the corners which can not be crushed by the vibration roller and the corners are tamped by manual cooperation. When rolling, if the unfavorable phenomena of spring soil, loose soil, peeling and the like occur, the soil is timely turned over and removed, and a proper amount of cement 3 is added to be mixed again or replaced by new cement soil 4. And (3) paving fine materials of the cement soil 4 in the rolled wavy hollow part in a manual matching manner, and continuing rolling until the surface is flat and has no obvious indentation.
Further, the time from mixing to compaction of the cement soil 4 is controlled within 4 h.
Attention points in construction: in the rolling process, the surface of the cement soil 4 is always kept wet, if the water is evaporated too fast, a small amount of water is timely added.
S06, quality inspection
After the cement soil 4 is paved and rolled, the settlement measurement, the compaction degree inspection and the water content detection are immediately carried out.
Measuring sedimentation amount
The method adopts a grid method, and a level gauge is used for measuring the sedimentation amount to ensure the forming thickness t of the paving material1The design requirement is met. And manually adjusting the excessive or insufficient parts.
Second degree of compaction test
The dry density of the cement soil 4 is detected by adopting a cutting ring method, and the sampling depth of the cutting ring is the paving forming thickness t 11/3, calculating the average dry density according to the plurality of measuring points, and comparing the average dry density with the maximum dry density rho corresponding to the optimal moisture content WOP to determine whether the compactness k meets the designed foundation treatment requirement. And when the compaction degree does not meet the designed foundation treatment requirement, continuously rolling until the compaction degree meets the requirement.
Third, detecting the water content
And tracking and detecting the water content of the cement soil 4 by adopting an alcohol burning loss method and an oven method on site.
S07, repeating the previous layer of cement soil construction
And after paving and rolling the cement soil 4 of one layer and quality inspection are qualified, repeating the steps of S03, S04 and S05, and carrying out uninterrupted construction on the cement soil 4 of the previous layer from bottom to top until construction of each layer within the total thickness T of the foundation treatment is completed. The construction of the cement soil 4 on each layer follows the principles of quick paving, quick leveling, compact tamping and quick detection.
Furthermore, the layered joint of the cement soil 4 is cut into a slope shape or a tooth ridge shape, the slope is not steeper than 1: 3, the width is controlled within 500-1000 mm, and the joint position of each layer is staggered by 500-1000 mm. And after finishing rolling of each layer of the cement soil 4, removing the loose cement soil 4 at the joint.
Further, after each layer of cement soil 4 is rolled, the quality detection is completed within 4 hours, and the covering of the upper layer of cement soil 4 is completed within 6-8 hours.
Attention points in construction: the construction should pay special attention to weather changes. And when the weather is continuous in low-temperature overcast and rainy days, stopping construction, and quickly rolling, covering and covering the paved cement soil 4 to ensure that the water content of the cement soil 4 is not changed too much. During construction in winter, covering and heat-preserving measures are taken for the rolled cement soil 4 to prevent freezing; if frozen, it is mechanically crushed or temporarily removed, and then thawed for use. When the construction is interrupted due to the reasons, after the construction is recovered, the new and old joint surfaces are planed and then the joint is constructed, the joint is lapped according to the slope shape or the tooth ridge shape, the lapping width is not less than 2m, and the joint is strengthened and rolled.
S08, area maintenance of replacement and filling
And after rolling and replacing the whole cement soil 4 in the replacement and filling area 6, adopting geotextile, plastic film or straw bag for heat preservation and covering, and performing watering maintenance for not less than 7 days. The number of times of sprinkling each day is determined according to the conditions of climate and humidity, the amount and the number of times of sprinkling are properly reduced in rainy days, the amount and the number of times of sprinkling are properly increased in sunny days, and the surface of the cement soil 4 is kept wet all the time in the maintenance period.
S09, rammed pile serging construction
And tamping a pile 7 to lock edges along the periphery of the replacement and filling area 6 by adopting cement and gravel soil 9. The method comprises the steps of firstly using a pile machine to position and form a hole to a designed depth, tamping by a heavy hammer, then filling cement gravel soil 9 stones into the pile hole, and continuously tamping and expanding the depth area of 800-1200 mm at the lower part of the pile to form an expanded head on the pile body, thereby ensuring the continuity and compactness of the pile body.
Example two
The difference between this embodiment and the first embodiment is:
step S04, mixing and transporting cement soil:
in the foundation treatment construction of the large-scale power machine foundation 5, a plant mixing method is adopted, and a mixer is selected to mix the cement 4. And mixing the cement soil 4 according to the mixing proportion determined by the design of foundation treatment, stirring repeatedly by using a stirrer until the color is uniform, and carrying out EDTA titration detection on the mixing amount of the cement 3 on the cement soil 4.
Furthermore, the amount of each mixing is not suitable to be excessive, the size of a mixing field is taken as a limit, the thickness is not more than 500mm, and the uneven mixing caused by the over-thick soil is avoided. Meanwhile, the mixing quantity in each time is 1.1-1.2 times of the quantity required by construction of each layer, and the cement soil 4 is prevented from being solidified due to excessive mixing and residual stacking.
Attention points in construction: the prepared cement soil 4 is temporarily covered by industrial felt or plastic film in the transportation process, so that the water loss or rain is prevented.
Step S06, quality inspection step (compactness inspection):
and (4) carrying out dry density detection by adopting a sand filling method or a nucleon density instrument, and then carrying out comparison and check with a cutting ring method.
Step S09, carrying out side locking construction on the rammed and expanded pile:
after the border locking construction of the tamping and expanding pile 7 in the whole replacement and filling area 6 is finished, the bearing capacity and the compressibility of the foundation of the cement soil 4 are measured by a bearing capacity tester, the foundation treatment is evaluated, and whether the design requirement of the foundation treatment is met or not is verified.
The second embodiment is particularly suitable for controlling the vibration of the large-scale, important and high-precision power machine foundation 5.
EXAMPLE III
The design basic size of a large high-precision compressor of a certain project is 41035 multiplied by 11400 multiplied by 6100mm (length multiplied by width multiplied by height), the foundation burial depth is about minus 6.0m, the working frequency of a compressor motor is 1.6 to 15.7Hz, and differential settlement is sensitive. The foundation is located in a soil filling area, foundation treatment is required for controlling foundation vibration, the rigidity, compactness and bearing capacity of foundation soil are required to be improved, and the compression rigidity, shear rigidity, bending rigidity, torsional rigidity, compaction coefficient, foundation bearing capacity, foundation horizontal resistance and the like of the treated foundation soil have clear requirements, and the foundation treatment method is realized by the following steps:
s01, drawing up foundation treatment scheme and designing foundation treatment parameters
By combining the operating frequency characteristic of a power machine and the displacement characteristic of a power machine foundation 5, a foundation treatment scheme of 'rolling cemented soil replacement and filling + pile tamping and expanding locking' is drawn up by developing a simulated foundation dynamic characteristic test, the replacement filler for foundation treatment is designed to be cemented soil 4, the volume mixing ratio of cement 3 to soil is 2: 8, the cement 3 adopts P.O 42.5.5 common portland cement, the total thickness T of the foundation treatment is 2.2m, the compaction coefficient k is not less than 0.95, the water content is controlled at the optimal water content WOP +/-2%, the foundation treatment range is 5m or 6m of the foundation of the power machine on each side, and the edge of the foundation treatment range is subjected to edge locking treatment by adopting cement gravel soil 9 and pile tamping 7.
S02 preparation and construction process test
Selecting raw materials
And selecting the cement soil 4 as a replacement material. The soil material in the cement soil 4 is selected from cohesive soil or powdery clay, bad cohesive soil materials containing saline soil, expansive soil, frozen soil, organic matters and the like cannot be used, the maximum particle size of the soil material after sieving is less than or equal to 15mm, the water content is controlled to be within the range of the optimal water content WOP +/-2 percent, the organic matter content is less than or equal to 2 percent, and the soil material is required to be held by hands for conglomeration and falling to the ground for flowering. If the soil is too wet, the soil needs to be aired, and if the soil is too dry, the water needs to be sprayed. The cement 3 in the cement soil 4 adopts the bulk composite portland cement with the strength grade of P.O 42.5.5, and continuously enters the field according to the same manufacturer, the same grade, the same variety and the same batch number.
Second indoor compaction test
And (3) taking qualified soil, adding cement 3 according to the mixing proportion designed by foundation treatment after screening, mechanically stirring uniformly to form cement soil 4, and performing compaction test by adopting an electric compaction tester to draw a compaction curve of the water content of the cement soil corresponding to the dry density. And analyzing the compaction curve of the cement soil 4, and determining the optimal water content WOP of the cement soil 4 and the corresponding optimal water content WOP maximum dry density rho.
③ in situ Rolling test
According to the parameters obtained by the indoor compaction test, the on-site rolling construction process test is carried out, the construction control parameters are verified and determined, and the test parameters meeting the design specification of foundation treatment, good quality, fast progress, economy and reasonability are selected as rolling machinery and the paving virtual thickness t0About 400mm, 10 times of rolling and forming thickness t1The thickness is approximately equal to 200mm, the compaction coefficient k is more than or equal to 0.95, the water content is controlled within the optimal water content WOP +/-2%, and the water content is used as the construction control parameter and the quality control technical requirement for replacing and filling the cement soil 4 in the foundation treatment.
S03 filling preparation
Earth excavation
And (3) performing foundation pit excavation in the site foundation treatment and replacement area 6 while material preparation and construction process tests are performed. And (3) performing contour lofting according to about 6m of the foundation 5 of the power machine widened from each side, and excavating by adopting machinery according to the slope ratio of 1: 1.5. When the soil is excavated to a position 100-200 mm above 1 base layer soil on the bottom surface of the foundation pit (namely excavating 1 elevation-8.0-8.1 m on the bottom surface of the foundation pit), manual trimming is replaced, 1 silt and broken rocks on the bottom surface of the foundation pit are removed, and overexcavation is avoided.
② lowering the underground water level
Before replacement and filling, the underground water level is firstly reduced to 500mm below 1 elevation of the bottom surface of the foundation pit in the replacement and filling area 6, so that no accumulated water is in the foundation pit. And arranging a drainage ditch on the bottom surface 1 of the foundation pit in the replacement and filling area 6, draining the open water into a water collecting well according to the gradient of 1 percent, and pumping and draining the water by adopting a submersible pump.
Thirdly, cleaning the bottom surface of the foundation pit
And (4) carrying out leveling treatment on the bottom surface 1 of the foundation pit in the replacement and filling area 6, and thoroughly removing all weak interlayers, silt, floating soil and sundries. If the soil of the base layer 1 on the bottom surface of the foundation pit is generally loose and seriously loses water, sprinkling water and statically grinding; and if the water content of the base soil of the bottom surface 1 of the foundation pit is too high and is in a soft plastic state, airing, and performing the next construction after the water content is proper.
Fourthly, concealed acceptance inspection
And (3) inspecting the groove on site, retesting the elevation 1 of the bottom surface of the foundation pit 6 in the replacement and filling area, and using a 2m long steel chisel for cuttage to check whether the base soil of the bottom surface 1 of the foundation pit is uniform.
S04, mixing and transporting cement soil
And calculating the mixing amount of the cement 3 according to the earth volume of the filling area 6, and adding the cement 3 into the soil material in batches and mixing to form the cement soil 4.
The plant mixing method is adopted, and a mixer is selected to mix the cement soil 4. And stirring the cement soil 4 according to the volume mixing ratio of the cement 3 to the soil of 2: 8, repeatedly stirring by using a stirrer until the color is uniform, and carrying out EDTA titration detection on the cement soil 4 according to the cement 3 mixing amount.
Furthermore, the amount of each mixing is not suitable to be excessive, the size of a mixing field is taken as a limit, the thickness is not more than 500mm, and the uneven mixing caused by the over-thick soil is avoided. Meanwhile, the mixing quantity in each time is 1.1-1.2 times of the quantity required by construction of each layer, and the cement soil 4 is prevented from being solidified due to excessive mixing and residual stacking.
Attention points in construction: the prepared cement soil 4 is temporarily covered by industrial felt or plastic film in the transportation process, so that the water loss or rain is prevented.
S05 spreading and rolling cement soil
Paving and leveling cement soil
The filling is carried out along the direction of the foundation pit by adopting a 'filling method' and a 'leveling method', the cement soil 4 is spread by a loader and a bulldozer, and the cement soil is leveled by a leveler and a frog hammer. Spreading a layer of cement 3 before the first layer of spreading material, and spreading the virtual material of cement soil 4 to a virtual thickness t0Thickening to 500 mm. The method comprises the steps of firstly roughly leveling by using a loader and a flat plate vibrator, and then finely leveling for 3-5 times by using a land leveler and a frog hammer according to the sequence of firstly leveling at the periphery and then leveling at the middle. And leveling the corner part by adopting superfilling and manual matching.
Further, the prepared soil cement 4 was completely paved within 2 hours.
② compacting cement soil
After the cement soil 4 is paved and leveled, a 20t low-frequency high-amplitude vibratory roller and a bump vibratory roller are adopted immediately to start rolling. The rolling mode is parallel to the axis direction, the full-vibration staggered distance method of forward and backward movement is adopted to perform back and forth comprehensive rolling, and the rolling is performed in an adjacent staggered arrangement in a mode of forward and backward movement from the outer side to the inner side. The vibration rolling frequency of the bump is controlled to be 10 times, firstly the transverse and longitudinal two-way static pressure is carried out for 2 times, then the transverse and longitudinal two-way vibration rolling is carried out for 6 times, and finally the surface is statically pressed for 2 times until the surface is flat and has no obvious indentation. The running speed is not more than 2.5km/h during rolling, slow running is suitable when rolling is started, and the track is rolled to be wider than 1/2 mm and not less than 200mm by adopting a track arranging and pressing method. The large construction machines such as bulldozers and excavators cannot turn around, brake suddenly or spin on the rolled cement soil 4, and obvious wheel tracks are avoided.
Furthermore, during sectional construction, the joint of two adjacent sections is cut into a slope shape or a tooth ridge shape, the slope is not steeper than 1: 3, the joint positions are mutually overlapped during rolling, the overlapping width is controlled to be 0.3-0.5 m, and the paving and rolling processes of two adjacent sections are simultaneously carried out.
Furthermore, a small electric frog hammer is adopted to tamper the corners which cannot be rolled by the vibration roller in a manual matching mode, and the tamping times are 5-7 times. When rolling, if the unfavorable phenomena of spring soil, loose soil, peeling and the like occur, the soil is timely turned over and removed, and a proper amount of cement 3 is added to be mixed again or replaced by new cement soil 4. And (3) paving fine materials of the cement soil 4 in the rolled wavy hollow part in a manual matching manner, and continuing rolling until the surface is flat and has no obvious indentation.
Further, the time from mixing to compaction of the cement soil 4 is controlled within 4 h.
Attention points in construction: in the rolling process, the surface of the cement soil 4 is always kept wet, if the water is evaporated too fast, a small amount of water is timely added.
S06, quality inspection
After the cement soil 4 is paved and rolled, the settlement measurement, the compaction degree inspection and the water content detection are immediately carried out.
Measuring sedimentation amount
The method adopts a grid method, and a level gauge is used for measuring the sedimentation amount to ensure the forming thickness t of the paving material1200 mm. And manually adjusting the excessive or insufficient parts.
Second degree of compaction test
And (3) carrying out dry density detection on the cement soil 4 by adopting a sand filling method or a nucleon density instrument, and then comparing and checking with a cutting ring method to determine whether the compactness k is more than or equal to 0.95. And when the compaction degree does not meet the designed foundation treatment requirement, continuously rolling until the compaction degree meets the requirement.
Third, detecting the water content
And tracking and detecting the water content of the cement soil 4 by adopting an alcohol burning loss method and an oven method on site.
S07, repeating the previous layer of cement soil construction
And after paving and rolling the one layer of cement soil 4 and passing quality inspection, repeating the steps S03, S04 and S05, and continuously constructing the previous layer of cement soil 4 from bottom to top until finishing the construction of each layer within the range of the total thickness T of the foundation treatment being 2200 mm. In this example, the paving material virtual thickness t of each layer of the cement soil 40400mm, spreading and forming thickness t1Spreading and rolling 11 layers together for 200 mm. The construction of each layer of the cement soil 4 follows the principles of quick paving, quick leveling, compact tamping and quick detection.
Furthermore, the layered joint of the cement soil 4 is cut into a slope shape or a tooth ridge shape, the slope is not steeper than 1: 3, the width is controlled within 500-1000 mm, and the joint position of each layer is staggered by 500-1000 mm. And after finishing rolling of each layer of the cement soil 4, removing the loose cement soil 4 at the joint.
Further, after each layer of cement soil 4 is rolled, the quality detection is completed within 4 hours, and the covering of the upper layer of cement soil 4 is completed within 6-8 hours.
Attention points in construction: the construction should pay special attention to weather changes. And when the weather is continuous in low-temperature overcast and rainy days, stopping construction, and quickly rolling, covering and covering the paved cement soil 4 to ensure that the water content of the cement soil 4 is not changed too much. During construction in winter, covering and heat-preserving measures are taken for the rolled cement soil 4 to prevent freezing; if frozen, it is mechanically crushed or temporarily removed, and then thawed for use. When the construction is interrupted due to the reasons, after the construction is recovered, the new and old joint surfaces are planed and then the joint is constructed, the joint is lapped according to the slope shape or the tooth ridge shape, the lapping width is not less than 2m, and the joint is strengthened and rolled.
S08, area maintenance of replacement and filling
And after rolling and replacing the whole cement soil 4 in the replacement and filling area 6, adopting geotextile, plastic film or straw bag for heat preservation and covering, and performing watering maintenance for not less than 7 days. The number of times of sprinkling each day is determined according to the conditions of climate and humidity, the amount and the number of times of sprinkling are properly reduced in rainy days, the amount and the number of times of sprinkling are properly increased in sunny days, and the surface of the cement soil 4 is kept wet all the time in the maintenance period.
S09, rammed pile serging construction
And tamping a pile 7 to lock edges along the periphery of the replacement and filling area 6 by adopting cement and gravel soil 9. The diameter of a tamped and expanded pile is 550mm, the pile spacing is 1.2m, the pile body is made of cement gravel soil 9, the volume ratio of gravel to soil is 2: 5, cement 3 in each gravel soil is not less than 200kg, the cement 3 is P.O 42.5.5 common portland cement, the particle size of the gravel is 10-30 mm, and the water content of the mixture is controlled to be within +/-2% of the optimal water content WOP. Firstly, a pile machine is used for contraposition hole forming until the pile end is deep into the designed depth, a heavy hammer is used for tamping for 1-2 times, then cement gravel soil 9 stones are filled into the pile hole, and the pile deep area of the pile lower part of 800-1200 mm is continuously tamped and expanded to form an expanded head on the pile body; feeding 0.1-0.2 m3 each time, and tamping 2-3 strokes per 500-800 mm pile depth; within the pile depth range of 2.0m to the pile top, the tamping is not less than 3 times, the weight of the tamping hammer is about 3t each time, and the continuity and compactness of the pile body are ensured. The pile forming test requires that the bearing capacity of the composite foundation reaches 220 kPa.
Further, after the border locking construction of the tamping and expanding pile 7 of the whole replacement and filling area 6 is completed, the bearing capacity and the compressibility of the foundation of the cement soil 4 are measured by a bearing capacity tester, the strength of the cement soil 4 is ensured to reach 0.8MPa, the foundation treatment is evaluated, and whether the design requirement of the foundation treatment is met is verified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A foundation treatment method for vibration control of a power machine foundation, characterized by: the method comprises the following steps:
s1) drawing up a foundation treatment scheme, designing foundation treatment parameters:
combining the operating frequency characteristic of a power machine and the displacement characteristic of a power machine foundation, developing a foundation treatment scheme of rolling cement soil replacement and tamping and expanding pile locking by developing a simulated foundation dynamic characteristic test, and designing replacement fillers, a mixing ratio, a total foundation treatment thickness T, a compaction coefficient k and an optimal water content WOP for foundation treatment;
s2) material preparation and construction process test:
selecting cement soil as a filling material, adopting bulk composite portland cement as cement in the cement soil, taking qualified soil materials, adding the cement according to a mixing ratio designed by foundation treatment after screening, mechanically stirring the cement uniformly into cement, adopting an electric compaction instrument to carry out compaction test, drawing a water content-dry density compaction curve of the cement soil, analyzing and determining the optimal water content WOP and the corresponding maximum dry density rho of the cement soil, developing a field rolling construction process test according to parameters obtained by an indoor compaction test, and further verifying and determining construction control parameters: rolling machine and spreading thickness t0Rolling, compacting by a compacting machine, and rolling to a thickness t1A compaction coefficient k, an optimal moisture content WOP and a maximum dry density rho;
s3) refill preparation work;
the foundation pit excavation of the site foundation treatment replacement area is carried out while material preparation and construction process tests are carried out, before replacement and filling, the underground water level is firstly reduced to 500mm below the elevation of the bottom surface of the foundation pit of the replacement and filling area to ensure that no accumulated water exists in the foundation pit, the bottom surface of the foundation pit of the replacement and filling area is leveled, all weak interlayers, silt, floating soil and sundries are thoroughly removed, the water content is appropriate through water exposure or airing, a groove is tested on site, and the elevation of the bottom surface of the foundation pit of the replacement and filling area is retested;
s4) mixing and transporting cement soil:
calculating the cement mixing amount according to the earthwork amount of the replacement and filling area, adding cement into soil materials in batches, and mixing to form cement soil;
s5) paving and rolling cement soil:
adopting an advancing occupying method to carry out along the direction of a foundation pit, filling by a leveling method, paving cement soil by a loader and a bulldozer, leveling by a grader and a frog rammer, immediately adopting a low-frequency high-amplitude vibratory roller and a bump vibratory roller to start rolling, wherein the rolling mode is parallel to the axial direction, carrying out back-and-forth full-vibration staggered rolling by an advancing and retreating full-vibration staggered method, and carrying out back-and-forth adjacent staggered rolling from the outer side to the inner side;
s6) quality inspection:
measuring the sedimentation amount with a level gauge by using a square grid method, and checking the rolling thickness t1Whether the design requirement is met or not, the excessive or insufficient parts are adjusted in a manual matching mode, the dry density of the cement soil is detected by a cutting ring method, and the cutting ring sampling depth is the rolling forming thickness t11/3, calculating average dry density according to a plurality of measuring points, comparing the average dry density with the maximum dry density rho corresponding to the optimal moisture content WOP, determining whether the compaction coefficient k meets the designed foundation treatment requirement, continuing rolling until the compaction coefficient does not meet the designed foundation treatment requirement, and tracking and detecting the moisture content of the cement soil by adopting an alcohol burning loss method and an oven method on site;
s7) repeating the previous layer of cement soil construction:
paving and rolling a layer of cement soil, and repeating the steps S3, S4 and S5 after the quality of the cement soil is qualified, and performing uninterrupted construction on the previous layer of cement soil from bottom to top until the construction of each layer within the total thickness T of the foundation treatment is completed;
s8) replacement and filling area maintenance:
after all the cement soil in the replacement and filling area is rolled and replaced, geotextile, plastic film or straw bag is adopted for heat preservation and covering, and watering maintenance is carried out for not less than 7 days;
s9) carrying out side locking construction on the rammed and expanded pile:
adopting cement gravel soil to tamp and expand a pile to lock the edge along the periphery of the replacement filling area, aligning and forming a hole to the designed depth by using a pile machine, tamping by using a heavy hammer, then filling cement gravel soil stones into the pile hole, and continuously tamping and expanding the area with the depth of 800-1200 mm at the lower part of the pile to form an expanded head on the pile body, so that the continuity and compactness of the pile body are ensured;
s10) evaluating foundation treatment:
after the border locking construction of the tamping-expanding pile in the whole replacement and filling area is completed, the bearing capacity and compressibility of the cement soil foundation are measured by using a bearing capacity tester, the foundation treatment is evaluated, and whether the design requirement of the foundation treatment is met or not is verified.
2. The method of claim 1, wherein the step S4) comprises mixing the cement with soil by road mixing, grid paving, or mixing the cement with water by a mixer during foundation treatment of large-scale power machine foundation.
3. The method of claim 2, wherein the moisture content of the soil cement is checked during the mixing process in step S4) and is controlled to be-2% to + 3% of the optimal moisture content WOP.
4. The method for foundation treatment for vibration control of a power machine foundation according to claim 1, wherein in the rolling and rolling step S5), the joints of two adjacent sections are cut into a slope or a notched ridge, the slope is not steeper than 1: 3, the joint positions are overlapped with each other during rolling, the overlapping width is controlled to be 0.3-0.5 m, and the paving and rolling processes of two adjacent sections are performed simultaneously.
5. The foundation treatment method for vibration control of a power machine foundation according to claim 1, wherein the cement soil spreading in step S5) is completed within 2h, and the time from the cement soil mixing to the completion of the compaction is controlled within 4 h.
6. The method of claim 1, wherein the dry density detection in step S6) is performed by sand-filling or nuclear densitometer, and then compared and checked with the ring cutter method.
7. The method of claim 1, wherein the quality inspection in step S7) is performed within 4 hours after the rolling of each layer of soil cement, and the covering of the upper layer of soil cement is performed within 6-8 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111638980.4A CN114277762B (en) | 2021-12-29 | 2021-12-29 | Foundation treatment method for foundation vibration control of power machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111638980.4A CN114277762B (en) | 2021-12-29 | 2021-12-29 | Foundation treatment method for foundation vibration control of power machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114277762A true CN114277762A (en) | 2022-04-05 |
| CN114277762B CN114277762B (en) | 2023-10-27 |
Family
ID=80877878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111638980.4A Active CN114277762B (en) | 2021-12-29 | 2021-12-29 | Foundation treatment method for foundation vibration control of power machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114277762B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198693A (en) * | 2022-07-18 | 2022-10-18 | 国网江苏省电力有限公司经济技术研究院 | Construction method and construction equipment for water conservancy dike |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311418A (en) * | 2007-05-25 | 2008-11-26 | 中国二十冶建设有限公司 | Exchange filling method for deep-foundation pit and large area equipment foundation |
| JP2009133202A (en) * | 2009-03-25 | 2009-06-18 | Yoshiro Watanabe | Mat foundation construction method and mat foundation |
| CN104818658A (en) * | 2015-05-13 | 2015-08-05 | 山西省交通科学研究院 | Road widening system and road widening method for collapsible yellow earth foundation layer |
| CN107974888A (en) * | 2017-12-01 | 2018-05-01 | 江苏中路工程技术研究院有限公司 | Construction method of the strength concrete pile as roadbed filling |
| CN111979846A (en) * | 2019-05-21 | 2020-11-24 | 牟航 | High-speed railway roadbed reinforcement treatment construction technology |
-
2021
- 2021-12-29 CN CN202111638980.4A patent/CN114277762B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311418A (en) * | 2007-05-25 | 2008-11-26 | 中国二十冶建设有限公司 | Exchange filling method for deep-foundation pit and large area equipment foundation |
| JP2009133202A (en) * | 2009-03-25 | 2009-06-18 | Yoshiro Watanabe | Mat foundation construction method and mat foundation |
| CN104818658A (en) * | 2015-05-13 | 2015-08-05 | 山西省交通科学研究院 | Road widening system and road widening method for collapsible yellow earth foundation layer |
| CN107974888A (en) * | 2017-12-01 | 2018-05-01 | 江苏中路工程技术研究院有限公司 | Construction method of the strength concrete pile as roadbed filling |
| CN111979846A (en) * | 2019-05-21 | 2020-11-24 | 牟航 | High-speed railway roadbed reinforcement treatment construction technology |
Non-Patent Citations (1)
| Title |
|---|
| 王素灵;: "水泥改良土路基填筑施工技术", no. 03 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198693A (en) * | 2022-07-18 | 2022-10-18 | 国网江苏省电力有限公司经济技术研究院 | Construction method and construction equipment for water conservancy dike |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114277762B (en) | 2023-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106836186A (en) | A kind of construction technology of utilizing solidified earth from sludge | |
| CN103806432B (en) | Method for treating foundations in slope filling and digging joint part of wet and soft zone in loess region | |
| CN106049407A (en) | Foundation dynamic compaction construction method | |
| CN107675577B (en) | Road subgrade closed cushion structure in soft soil area and construction method thereof | |
| CN107237301B (en) | The construction method of high altitude localities sand-gravel dam continuous laying | |
| CN101311418A (en) | Exchange filling method for deep-foundation pit and large area equipment foundation | |
| CN115288162B (en) | Reinforcing method for soft soil foundation filling side slope | |
| CN108486976A (en) | Mountain highway, which is filled out, digs intersection road structure and its construction method | |
| CN111778796A (en) | Roadbed construction process | |
| CN102182866A (en) | Backfilling process for large ultra-deep circulating water pipe | |
| CN114277762B (en) | Foundation treatment method for foundation vibration control of power machine | |
| CN110820456A (en) | Anti-settling and replacement-filling alternate airport runway and construction method thereof | |
| CN112627168A (en) | High-density polymer grouting reinforcement method for roadbed at sunken part of bridge and culvert butt strap | |
| CN110029626B (en) | Reinforcing treatment method for revetment foundation on soft stratum slope | |
| CN112813756A (en) | Roadbed based on municipal soft soil and construction method | |
| CN208455387U (en) | Mountain highway, which is filled out, digs intersection road structure | |
| CN116377780A (en) | Mountain highway high-fill roadbed filling construction method | |
| CN107386212B (en) | The method of high altitude localities asphalt concrete core dam construction | |
| CN113638299B (en) | Construction method for repairing temporary asphalt pavement | |
| CN215977337U (en) | Composite sandwich liner barrier type impervious wall | |
| CN116103969A (en) | High-efficiency highway engineering saline soil roadbed treatment process | |
| CN115434202A (en) | Dongfeng poor-grade coral soil base layer construction method based on double-layer waterproof design | |
| Wilson et al. | The use of low grade rockfill at Roadford Dam | |
| CN111304986A (en) | Construction method for treating soft foundation settlement in plateau frozen soil area | |
| Hicks et al. | Design and construction of base courses |
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 |