CN114606842A - Construction device and construction method for EPS foam particle mixed light soil roadbed - Google Patents
Construction device and construction method for EPS foam particle mixed light soil roadbed Download PDFInfo
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- CN114606842A CN114606842A CN202210285934.9A CN202210285934A CN114606842A CN 114606842 A CN114606842 A CN 114606842A CN 202210285934 A CN202210285934 A CN 202210285934A CN 114606842 A CN114606842 A CN 114606842A
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- 239000002689 soil Substances 0.000 title claims abstract description 110
- 238000010276 construction Methods 0.000 title claims abstract description 70
- 239000002245 particle Substances 0.000 title claims abstract description 51
- 239000006260 foam Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 abstract description 9
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000011417 postcuring Methods 0.000 abstract description 2
- 239000004575 stone Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011378 shotcrete Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- -1 rectangle Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a construction device and a construction method for an EPS foam particle mixed light soil roadbed, belonging to the technical field of building construction, wherein the construction device can be combined with a vibration drainage device of the existing sand and stone material mixer, and comprises a vibration device, a guniting device and a connecting sleeve, wherein the top end of the connecting sleeve is welded with a telescopic arm, the vibration device is welded with the connecting sleeve, and the guniting device is arranged in the connecting sleeve; the detachable vibration hammer is arranged at the top of the connecting sleeve, so that the problems caused by the rolling type soil roadbed solidifying device are solved, a mud pit is not required to be built, and the land is saved; the method of the invention controls the high-speed vibration device to make the sandy soil vibrate and liquefy; the EPS foam particles and the silty sand soil body can be fully stirred, so that the integral uniformity is realized; after the uniformity reaches a target value, adding a curing agent, stirring, and performing post-curing for a specified age to form the EPS foam particle mixed silt light soil embankment; the method has the advantages of few procedures, high construction speed and small influence of weather factors.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction device and a construction method of an EPS foam particle mixed light soil roadbed.
Background
With the development of highway construction, the problem of treatment of special roadbed sections is increasingly prominent, embankments are built on weak foundations and foundations with poor geological conditions, and roadbed treatment is generally needed due to settlement and uneven settlement of the roadbed. When the bridge head embankment is filled and the road is widened and spliced, the construction difficulty is particularly remarkable, and the key point is the problem of differential settlement with the built road or the structure. The traditional process is to reinforce the foundation (such as cement mixing piles and concrete pipe piles) or pre-press the drainage of the foundation (such as plastic drainage plate treatment) in the filling range, but the similar method has higher cost and longer construction period, and the ideal requirement on eliminating differential settlement is difficult to achieve. Except for conventional soft foundation treatment methods such as drainage consolidation, pile foundation construction and the like, the light mixed soil filler has been deeply researched and applied at home and abroad in the years. If the light filler can be used for replacing the common soil filler, the additional load of the light filler to the foundation can be greatly reduced, so that the stability requirement of the soft foundation to the embankment is easier to meet, and the construction cost of reinforcement and the like is greatly reduced. It is therefore desirable to find a lightweight material that replaces the traditional road base filler to reduce the road base load and the additional stress of soft soil foundations.
The EPS foam particle mixed light soil is used as the bridge head embankment filler, which is an important way for solving the problems. Compared with common soil, the EPS foam particle mixed light soil has the characteristics of ultralight weight, compression resistance, self-supporting property, high strength and the like, and the characteristics ensure that the embankment has higher modulus of resilience and smaller settlement and deformation, thereby ensuring the stability of the embankment and providing good conditions for reducing the compaction requirement of the embankment. Therefore, the method is widely applied in China, effectively solves the problems of settlement and uneven settlement of the soft foundation transition section, differential settlement of the connection part of the embankment and the abutment and the like, and has better effect.
At present, EPS particle mixed light soil can be divided into two types according to construction methods: firstly, raw material soil, EPS particles, a curing material and water are mixed into flowable slurry, and then the slurry is conveyed to a construction site by taking a pump as a power supply device and taking a pipeline as a medium for casting construction. The method is characterized by convenient and quick construction, and is particularly suitable for silt and cohesive soil with high water content; secondly, the rolling type EPS particles mixed light soil is prepared by mixing raw material soil, EPS particles, curing materials and water into loose mixture, then transporting the mixture to a construction site by a truck, compacting the mixture by layering rolling or tamping, and curing the mixture to form a whole body with required strength. The key technology is the control of water content, and the method is suitable for sandy soil and silty soil with low water content. However, according to the current roadbed filler test detection method, long-time curing reaction is needed to achieve the optimal water content, complex procedures such as paving and rolling are needed, the construction period is long, the construction procedures are multiple, the control is difficult, the construction cost is high, and the construction period is obviously influenced by weather. The existence of the problems influences the large-scale application of EPS particle mixed light soil as the bridge head embankment filler.
Silt is composed of fine sand and silt particles, and has a lower cohesive force compared with a fine clay filler. At present, the technology of adding water to silt for pulping and mixing EPS foam particles is adopted, and the specific construction method is that part of raw materials of the silt, the water for pulping and the EPS foam particles are mixed and put into a stirrer for stirring, and meanwhile, the rest raw materials of the silt, the curing agent and the mixture are added into the stirrer for stirring until the mixture is uniform.
In summary, in order to solve the problems of multiple construction processes, long construction period, easy weather influence and high construction cost of the rolling type EPS particle light embankment, a construction method which has fewer processes, is simple to control and can better balance the construction period and the engineering quality is urgently needed.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides a construction device of an EPS foam particle mixed light soil subgrade, which is suitable for solving the problems of settlement and uneven settlement of a soft foundation transition section, differential settlement of a joint of an embankment and a bridge abutment and the like in highway engineering; the invention also aims to provide a construction method of the construction device for the EPS foam particle mixed light soil roadbed.
The technical scheme is as follows: in order to achieve the purpose, the construction device of the EPS foam particle mixed light soil roadbed comprises a vibration device, a guniting device and a connecting sleeve, wherein the top end of the connecting sleeve is welded with a telescopic arm, the vibration device is welded with the connecting sleeve, and the guniting device is arranged in the connecting sleeve; and a detachable vibration hammer is arranged at the top of the connecting sleeve.
Further, the vibration device comprises a limiting plate, a transverse vibration plate, a rib plate, a connecting shaft and a rotary guide piece; the transverse vibrating plate is hinged with a connecting plate through a connecting shaft, the connecting plate is welded on the connecting sleeve in an inclined manner, and the transverse vibrating plate rotates in a vertical plane; the limiting plate and the rib plate are welded between the connecting sleeve and the bottom of the transverse vibrating plate and used for reinforcing the connecting plate.
Further, the guniting device comprises a proportional valve assembly and a guniting pipe which are connected, wherein the guniting pipe comprises a grout inlet and an air jet; the inner convex part of the rotary guide piece is inserted into the concave part of the connecting sleeve to be connected; and the proportional valve assembly is welded at the inlet of the guniting pipe and controls the opening and closing of the guniting port and the air jet port.
Further, the connecting sleeve comprises a necking sleeve and a fitting port, and the fitting port is welded at the joint of the necking sleeve.
Furthermore, the number of the limiting plates is four, the limiting plates are respectively welded with the connecting sleeve, and the limiting plates are hinged with the connecting shaft; the four transverse vibrating plates are uniformly arranged on the same plane; the connecting plates are four, the connecting plates are perpendicular to the telescopic arms, the protruding parts of the transverse vibrating plates are inserted into the concave parts of the connecting plates, and the connecting plates are connected through rotary connecting shafts.
Furthermore, the surface material of the connecting sleeve adopts steel wires, non-woven geotextile and permeable filter membranes; the transverse vibrating plate is made of any one of rectangular steel, reinforcing steel bars and T-shaped steel.
Further, the construction method of the construction device for the EPS foam particle mixed light soil roadbed comprises the following steps:
the guniting device is used for air-jet drilling, and the vibration hammer drives the telescopic arm to enable the connecting sleeve to be inserted into a soil body;
liquefying a fine sand soil body by the vibration device;
through closing vibrating device vibration function and through injecting EPS foam granule mixed cement thick liquid in the whitewashing device into the soil body, open vibrating device rotatory stirring function stirring mixed soil body, wait after the stirring, form this regional solidification light soil embankment.
Further, liquefying the fine silt soil body by the vibration device includes:
step one, selecting the length 1/2D of a transverse vibrating plate according to the designed beating distance D of an internal stirrer to manufacture a corresponding vibrating device, and welding the corresponding vibrating device on a connecting sleeve;
step two, digging out the upper layer soil body by using a digging machine;
thirdly, in the process of driving the vibration device, a vibration hammer is adopted to hammer the sleeve, the guniting device is used for spraying air, the whole device is driven into the sleeve under the action of the vibration hammer to vibrate the soil body, so that the soil is rapidly reduced or completely loses the shear strength, and the foundation is liquefied;
after the fine sand soil body is liquefied, pulling up 1/2D to make the transverse vibrating plate completely unfolded and vertical to the connecting sleeve;
injecting EPS foam particle mixed cement slurry into the slurry spraying device, starting a rotation function of the vibration device, and rotating and stirring the transverse vibration plate at a low speed around the rotating connecting shaft until the light soil is uniform;
and step six, stopping spraying the slurry and pulling up the connecting sleeve.
Furthermore, the connecting sleeve is a steel pipe with the outer diameter of 30cm, the inner diameter of 27cm and the wall thickness of a round pipe of 15 mm; a necking sleeve is arranged at the position 50cm away from the bottom of the connecting sleeve, and the outer diameter of the bottom of the necking sleeve is 13cm, and the inner diameter of the bottom of the necking sleeve is 10 cm; manufacturing the vibration device according to the design parameters of the connecting sleeve; the length of the transverse vibrating plate is 0.5m, and the cross-sectional dimension is 10cm x 2 cm; the connecting plate is welded on the connecting sleeve, and the cross section of the connecting plate is 5cm by 2cm, and the thickness of the connecting plate is 2 cm; the transverse vibrating plate is hinged with the connecting plate through a steel shaft with the diameter of 1cm and the length of 10cm as a rotating connecting shaft.
Further, after the fine sand soil body is liquefied, the upper drawing height of the telescopic arm is 0.5m, so that the transverse vibrating plate is completely unfolded and is perpendicular to the connecting sleeve; the spraying device injects EPS foam particle mixed cement slurry, the vibration device starts the rotation function, and the transverse vibration plate rotates around the connecting shaft at a low speed for stirring until the light soil is uniform; then, the guniting is stopped and the telescopic arm is pulled up until the connecting sleeve is completely pulled out of the ground.
Has the advantages that: compared with the prior art, the construction device of the EPS foam particle mixed light soil roadbed of the invention,
the vibration drainage device capable of being combined with the existing sand and stone material mixer comprises a vibration device, a guniting device and a connecting sleeve, wherein the top end of the connecting sleeve is welded with a telescopic arm, the vibration device is welded with the connecting sleeve, and the guniting device is arranged in the connecting sleeve; the detachable vibrating hammer is arranged at the top of the connecting sleeve, so that the problems caused by the rolling type solidified soil roadbed device are solved, a mud pit is not required to be built, and the land is saved; the construction method of the invention promotes the liquefaction of the raw material soil, and the EPS foam particles are added to be stirred with the cement slurry in situ after the raw material soil is liquefied to form the solidified soil subgrade.
Drawings
FIG. 1 is a front view of a vibration device (with a transverse vibrating plate deployed);
FIG. 2 is a front view of the vibration apparatus (with the transverse vibrating plate retracted);
FIG. 3 is a cross-sectional view of a vibrating device (including a shotcrete tube);
FIG. 4 is a front view of the coupling sleeve (containing the shotcrete tube);
FIG. 5 is a cross-sectional view of the connecting sleeve (containing the shotcrete tube);
FIG. 6 is a view showing the construction process of the vibration liquefaction method of the light silt foundation;
the reference signs are: the device comprises a telescopic arm 1, a vibrating device 2, a guniting device 3, a connecting sleeve 4, a limiting plate 5, a transverse vibrating plate 6, a ribbed plate 7, a connecting plate 8, a connecting shaft 9, a rotating guide 10, a proportional valve assembly 11, a guniting pipe 12, a vibrating hammer 13, a necking sleeve 14 and a fitting opening 15.
Detailed Description
The structure and performance of the present invention will be further explained with reference to the accompanying drawings.
It is to be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
The invention aims to overcome the defects that the traditional rolling type solidified soil roadbed is easily influenced by weather, has complicated working procedures and long construction period, can obviously shorten the construction period, reduce the angle of slope and reduce the earthwork amount of the solidified soil light embankment construction technology.
The construction device for the EPS foam particle mixed light soil subgrade comprises a vibration device 2, a guniting device 3 and a connecting sleeve 4. The vibrating device 2 comprises a limiting plate 5, a transverse vibrating plate 6, a rib plate 7, a connecting plate 8, a connecting shaft 9 and a rotary guide 10.
The guniting device 3 comprises a proportional valve assembly 11 and a guniting pipe 12 which are connected, and the guniting pipe 12 is provided with a grout inlet and an air jet.
The bottom of the connecting sleeve 4 consists of a necking sleeve 14 and an attaching opening 15.
The top end of the connecting sleeve 4 is welded with the telescopic arm 1, the vibration device 2 used in a combined mode needs to be welded with the connecting sleeve 4, and the guniting device 3 is arranged in the connecting sleeve 4. Using a guniting device 3 to jet air and punch holes, inserting the device into a soil body under the action of a vibration hammer 13, and starting a vibration device 2 to liquefy a fine-grained sand soil body; then the vibration function of the vibration device 2 is closed, EPS foam particle mixed cement slurry is injected into the soil body through the slurry spraying device 3, the vibration device 2 is opened to rotate and stir the mixed soil body, and after the mixed soil body is uniformly stirred, the solidified light soil embankment in the area is formed.
The vibration hammer 13 is a high-speed vibration hammer with the frequency of 30Hz to 60Hz and the power of 3kw for pulling the electric hammer is selected as the motor, and the vibration hammer is 2.5 t.
In the process of driving the vibration device 2, the proportional valve component 11 of the guniting device 3 opens an air jet of the guniting pipe 12, the whole device is driven to enter under the action of the vibration hammer 13, vibration is dispersed and transmitted to surrounding soil bodies through the transverse vibration plate 6, the soil bodies are fully vibrated, after silt soil is subjected to the action of vibration force, the volume of the soil is reduced, the pore pressure is increased suddenly, the effective pressure is reduced, the soil is reduced rapidly or the shear strength is completely lost, and the soil bodies flow like liquid or are sprayed out of the ground to be liquefied; the telescopic boom 1 is pulled out to a certain height, the transverse vibrating plate 6 can be unfolded under the resistance of an upper soil body, meanwhile, the limited plate 5 and the ribbed plate 7 are used for unfolding the top plate, and the transverse vibrating plate 6 is perpendicular to the connecting sleeve 4; in order to facilitate uniform mixing, in the process of pulling out and inserting the telescopic boom 1, a proportional valve assembly 11 of the guniting device 3 closes an air jet of a guniting pipe 12 and opens a grout inlet, EPS foam particle mixed cement slurry is injected, a vibration device 2 starts a rotation function, a transverse vibration plate 6 rotates and stirs at a low speed around a connecting shaft 9 under the guidance of a rotation guide piece 10 until a light soil body is uniform, and finally the light soil body is pulled out and recovered.
The transverse vibrating plates 6 are four in total, are uniformly distributed on the same plane and are hinged to the connecting plates 8 through connecting shafts 9, the connecting plates 8 are welded on the connecting sleeve 4 in an inclined mode by 45 degrees, and the transverse vibrating plates 6 can rotate in the vertical plane. The transverse vibrating plate 6 is made of steel such as rectangle, steel bar, T-shaped steel and the like.
And the four limiting plates 5 are respectively welded with the connecting sleeve 4 and hinged with the connecting shaft 9. And a rib 7 welded between the coupling sleeve 4 and the bottom of the lateral vibration plate 6 for reinforcing the coupling plate 8.
The connecting plates 8, four in total, are perpendicular to the telescopic arm 1, and the convex part of the transverse vibrating plate 6 is inserted into the concave part of the connecting plates 8 and connected by a rotary connecting shaft 9. The rib 7 is welded between the connecting sleeve 4 and the connecting plate 8 for reinforcing the connecting plate 8.
The inner protrusion is inserted into the concave of the coupling sleeve 4 to be coupled with the rotary guide 10.
And the proportional valve assembly 11 is welded at the inlet of the guniting pipe 12 and controls the opening and closing of the guniting port and the air jetting port.
The connecting sleeve 4 is welded with the vibration device 2 and the telescopic arm 1 respectively, and the top of the connecting sleeve is provided with a vibration hammer 13 which can be detached. The surface material adopts steel wires, non-woven geotextile and permeable filter membranes. The seam 15 is welded to the neck sleeve 14 junction.
The vibration liquefaction stirring method adopting the vibration device 2 comprises the following steps:
step one, according to the designed beating distance D of the built-in stirrer, selecting the length 1/2D of the transverse vibrating plate 6 to manufacture the corresponding vibrating device 2, and welding the corresponding vibrating device 2 on the connecting sleeve 4.
And step two, digging out the soil body on the upper layer part by using a digging machine.
And step three, in the process of driving the vibration device 2, a vibration hammer 13 is adopted to hammer the sleeve, the guniting device 3 is used for spraying air, the whole device is driven into the sleeve under the action of the vibration hammer 13, the soil body is vibrated, the shear strength of the soil is rapidly reduced or completely lost, and the soil becomes foundation liquefaction.
And step four, after the fine sand soil body is liquefied, the telescopic arm 1 is pulled up to a height 1/2D, so that the transverse vibrating plate 6 is completely unfolded and is perpendicular to the connecting sleeve 4.
And fifthly, injecting EPS foam particle mixed cement slurry into the slurry spraying device 3, starting a rotating function of the vibration device, and rotating and stirring the transverse vibration plate 6 at a low speed around the rotating connecting shaft 9 until the light soil is uniform.
And step six, stopping spraying the slurry and pulling up the connecting sleeve 4.
The EPS foam particle mixed powder sand light soil roadbed comprises preparation of slurry, and manufacturing and construction methods of a vibration device 2, a trapezoidal support frame, a high-speed vibrator and a slurry spraying device 3.
As shown in fig. 1, the main structure of the vibration device 2 welded to the telescopic arm 1 is a connecting sleeve 4 with a transverse vibration plate 6, the transverse vibration plate 6 is hinged to a connecting plate 8 through a rotating connecting shaft 9, and the connecting plate 8 is welded to the connecting sleeve 4. The rib 7 is welded between the connecting sleeve 4 and the connecting plate 8 for reinforcing the connecting plate 8.
When the upper part of the diaphragm 6 receives resistance, as shown in fig. 2, it is retracted to the position of the diaphragm 6 shown in fig. 4, which facilitates the upward pulling of the telescopic arm 1.
As shown in fig. 3, the transversal vibrating plate 6 is rotated in the vertical plane by the limiting plate 5 perpendicular to the connecting sleeve 4.
As shown in fig. 4, contains surface materials: steel wires, non-woven geotextile and a permeable filter membrane.
As shown in fig. 5, the guniting pipe 12 abuts against the inner wall of the connecting sleeve 4.
As shown in fig. 6, the construction method of the EPS foam particle mixed silt lightweight soil roadbed comprises the following steps:
(1) the connecting sleeve 4 is a steel pipe with the outer diameter of 30cm, the inner diameter of 27cm and the wall thickness of a round pipe of 15mm, a necking sleeve 14 is arranged at the position 50cm of the bottom, the outer diameter of the bottom is 13cm, the inner diameter of the bottom is 10cm, and the surface material adopts steel wires, non-woven geotextile and permeable filter membranes; manufacturing a vibration device 2 according to the sleeve and design parameters; the transverse vibrating plate 6 is 0.5m in length and 10cm by 2cm in cross section; the connecting plate 8 is welded on the connecting sleeve 4, and the cross section size is 5cm x 2cm, and the thickness is 2 cm; the transverse vibrating plate 6 is hinged with the connecting plate 8 by taking a steel shaft with the diameter of 1cm and the length of 10cm as a rotating connecting shaft 9;
(2) welding the vibration device 2 on the connecting sleeve 4; welding the connecting sleeve 4 on the excavator telescopic arm 1;
(3) positioning the driving position of the vibrating device 2, and driving the vibrating device 2 into the foundation through a sleeve; the vibration hammer is 2.5t, and the motor is used for driving the electric hammer with the power of 3 kw; hammering the sleeve to drive the sleeve into the foundation, and simultaneously, expanding the transverse vacuum plate under the resistance of the lower soil body to vibrate and liquefy the surrounding soil body;
(4) a slurry inlet of the slurry spraying device 3 is provided with an air blower and a vacuum pump in advance, and EPS foam particles are mixed with cement slurry;
after the appliances are manufactured, the construction of the EPS foam particle mixed powder sand light soil roadbed is carried out; and selecting a certain section to be constructed, wherein the design height of the embankment of the section is 2m, the length of the standard section is 200m, and the scale of one construction area is 5 multiplied by 5 m.
The specific field construction process comprises the following steps:
step one, selecting the length of a transverse vibrating plate 6 to be 0.5m, manufacturing a corresponding vibrating device 2, and welding the vibrating device on a connecting sleeve 4;
step two, digging out the upper layer soil body by using a digging machine;
thirdly, in the process of driving the vibration device 2, a vibration hammer 13 is adopted to hammer the sleeve, the guniting device 3 is used for spraying air, the whole device is driven into the sleeve under the action of the vibration hammer 13, the soil body is vibrated, the shear strength of the soil is rapidly reduced or completely lost, and the soil becomes foundation liquefaction;
after the fine sand soil body is liquefied, the telescopic arm 1 is pulled up to 0.5m, so that the transverse vibrating plate 6 is completely unfolded and is vertical to the connecting sleeve 4;
injecting EPS foam particle mixed cement slurry into the slurry spraying device 3, starting a rotation function of a vibration device, and rotating and stirring the transverse vibration plate 6 at a low speed around a rotating connecting shaft 9 until the light soil is uniform;
and step six, stopping guniting, and pulling the telescopic arm 1 upwards until the device is completely pulled out of the ground.
The invention enriches the processing method of the EPS foam particle mixed silt light soil foundation, has obvious soil body fluidity compared with the control method of a rolling type solidified soil foundation, and is convenient for mixing with EPS foam particles; compared with the method of mixing in the factory and then transporting, paving and rolling, the construction cost can be greatly reduced, and the construction period is shortened. In the construction process, the connecting sleeve 4 is only required to be welded with the vibrating device 2 and the telescopic arm 1 respectively, and the construction is simple.
The invention makes the sandy soil vibrated and liquefied by controlling the high-speed vibration device 2; the EPS foam particles and the fine sand soil body can be fully stirred, so that the whole uniformity is realized; after the uniformity reaches a target value, adding a curing agent, stirring, and performing post-curing for a specified age to form the EPS foam particle mixed silt light soil embankment; the method has the advantages of less procedures, high construction speed and small influence of weather factors, can quickly finish the filling of embankment and dam, reduce the slope angle and the earthwork amount, better balance the relation among the construction period, the engineering quality and the engineering investment, and can recycle the vertical template, thereby being green and environment-friendly.
Compared with the construction technology of the embankment of EPS foam particle mixed light soil, the in-situ solidified roadbed provided by the invention directly injects EPS and cement slurry into a roadbed cavity, does not need the construction of a slurry pool, saves land, and can effectively increase the prepressing period of the foundation. The invention is suitable for solving the problems of settlement and uneven settlement of the soft foundation transition section, differential settlement at the joint of the embankment and the abutment and the like in highway engineering.
Claims (10)
- The construction device of the EPS foam particle mixed light soil roadbed is characterized in that: the device comprises a vibration device (2), a guniting device (3) and a connecting sleeve (4), wherein the top end of the connecting sleeve (4) is welded with a telescopic arm (1), the vibration device (2) is welded with the connecting sleeve (4), and the guniting device (3) is arranged in the connecting sleeve (4); and a detachable vibration hammer (13) is arranged at the top of the connecting sleeve (4).
- 2. The construction equipment of EPS foam particle mixed light soil roadbed of claim 1, characterized in that: the vibrating device (2) comprises a limiting plate (5), a transverse vibrating plate (6), a rib plate (7), a connecting plate (8), a connecting shaft (9) and a rotary guide piece (10); the transverse vibrating plate (6) is hinged with a connecting plate (8) through a connecting shaft (9), the connecting plate (8) is welded on the connecting sleeve (4) in an inclined mode of 45 degrees, and the transverse vibrating plate (6) rotates in a vertical plane; the limiting plate (5) and the rib plate (7) are welded between the connecting sleeve (4) and the bottom of the transverse vibrating plate (6) and used for reinforcing the connecting plate (8).
- 3. The construction equipment of EPS foam particle mixed light soil roadbed of claim 2, characterized in that: the guniting device (3) comprises a proportional valve assembly (11) and a guniting pipe (12) which are connected, and the guniting pipe (12) comprises a grout inlet and an air jet; the rotary guide piece (10) is connected by inserting an inner convex part into a concave part of the connecting sleeve (4); and the proportional valve assembly (11) is welded at the inlet of the guniting pipe (12) and controls the opening and closing of the guniting port and the air jetting port.
- 4. The construction equipment of EPS foam particle mixed light soil roadbed of claim 3, characterized in that: the connecting sleeve (4) comprises a necking sleeve (14) and an attaching opening (15), and the attaching opening (15) is welded at the joint of the necking sleeve (14).
- 5. The construction device of the EPS foam particle mixed light soil roadbed as claimed in claim 4, wherein: the number of the limiting plates (5) is four, the limiting plates (5) are respectively welded with the connecting sleeve (4), and the limiting plates (5) are hinged with the connecting shaft (9); the number of the transverse vibrating plates (6) is four, and the transverse vibrating plates are uniformly distributed on the same plane; the connecting plates (8) are four, the connecting plates (8) are perpendicular to the telescopic arm (1), the protruding part of the transverse vibrating plate (6) is inserted into the concave part of the connecting plates (8), and the connecting plates (8) are connected by a rotary connecting shaft (9).
- 6. The construction equipment of EPS foam particle mixed light soil roadbed of claim 2, characterized in that: the surface material of the connecting sleeve (4) adopts steel wires, non-woven geotextile and a permeable filter membrane; the transverse vibrating plate (6) is made of any one of rectangular steel, reinforcing steel bars and T-shaped steel.
- 7. The construction method of the construction device for the EPS foam particle mixed light weight soil roadbed as claimed in any one of the claims 4-6, characterized in that the method comprises:the guniting device (3) is used for air-jet drilling, and the vibration hammer (13) drives the telescopic arm (1) to enable the connecting sleeve (4) to be inserted into a soil body;liquefying a fine sand soil body by the vibration device (2);through closing vibrating device (2) vibration function and through injecting EPS foam granule mixed cement thick liquid into the soil body in whitewashing device (3), open vibrating device (2) rotatory stirring function stirring mixed soil body waits to stir the back, forms the solidification light soil embankment in this region.
- 8. The construction method of a construction device for an EPS foam particle mixed lightweight soil roadbed according to claim 7, wherein liquefying a fine sand soil body by the vibration device (2) comprises:step one, selecting the length 1/2D of a transverse vibrating plate (6) according to a designed beating distance D of an internal stirrer to manufacture a corresponding vibrating device (2), and welding the vibrating device on a connecting sleeve (4);step two, digging out the upper layer soil body by using a digging machine;thirdly, in the process of driving the vibration device (2), a vibration hammer (13) is adopted to hammer the sleeve, the guniting device (3) is used for spraying air, the whole device is driven into the device under the action of the vibration hammer (13), the soil body is vibrated, the shear strength of the soil is rapidly reduced or completely lost, and the soil becomes foundation liquefaction;after the fine sand soil body is liquefied, pulling up 1/2D on the telescopic arm (1) to completely expand the transverse vibrating plate (6) to be vertical to the connecting sleeve (4);injecting EPS foam particle mixed cement slurry into the slurry spraying device (3), starting a rotation function of the vibration device, and rotationally stirring the transverse vibration plate (6) around the rotating connecting shaft (9) until the light soil is uniform;and step six, stopping guniting and pulling up the connecting sleeve (4).
- 9. The construction method of the construction device of the EPS foam particle mixed lightweight soil roadbed as claimed in claim 8, wherein the connecting sleeve (4) is a steel pipe with an outer diameter of 30cm, an inner diameter of 27cm and a circular pipe wall thickness of 15 mm; a necking sleeve (14) is arranged at the position 50cm away from the bottom of the connecting sleeve (4), and the outer diameter of the bottom of the necking sleeve (14) is 13cm, and the inner diameter of the bottom of the necking sleeve is 10 cm; manufacturing the vibration device (2) according to the design parameters of the connecting sleeve (4); the length of the transverse vibrating plate (6) is 0.5m, and the cross-sectional dimension is 10cm x 2 cm; the connecting plate (8) is welded on the connecting sleeve (4) and has the cross section size of 5cm by 2cm and the thickness of 2 cm; the transverse vibrating plate (6) and the connecting plate (8) are hinged through the connecting shaft (9) which is a steel shaft with the diameter of 1cm and the length of 10cm and serves as a rotating connecting shaft (9).
- 10. The construction method of the construction device of the EPS foam particle mixed lightweight soil roadbed as claimed in claim 8, wherein after the fine sand soil body is liquefied, the telescopic arm (1) is pulled up by 0.5m to fully unfold the transverse vibration plate (6), and the transverse vibration plate (6) is vertical to the connecting sleeve (4); the EPS foam particle mixed cement slurry is injected into the slurry spraying device (3), the vibration device starts a rotation function, and the transverse vibration plate (6) rotates around the rotating connecting shaft (9) to stir until the light soil is uniform; then, stopping guniting and pulling up the telescopic arm (1) until the connecting sleeve (4) is completely pulled out of the ground.
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| CN202210285934.9A CN114606842B (en) | 2022-03-23 | Construction device and construction method for EPS foam particle mixed light soil roadbed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210285934.9A CN114606842B (en) | 2022-03-23 | Construction device and construction method for EPS foam particle mixed light soil roadbed |
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