CN116537152A - Elastic dynamic compaction method and construction equipment - Google Patents
Elastic dynamic compaction method and construction equipment Download PDFInfo
- Publication number
- CN116537152A CN116537152A CN202310371126.9A CN202310371126A CN116537152A CN 116537152 A CN116537152 A CN 116537152A CN 202310371126 A CN202310371126 A CN 202310371126A CN 116537152 A CN116537152 A CN 116537152A
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- China
- Prior art keywords
- rammer
- elastic
- dynamic compaction
- ram
- lifting
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- Pending
Links
- 238000005056 compaction Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000005381 potential energy Methods 0.000 claims abstract description 32
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
Abstract
The invention relates to the technical field of foundation treatment, in particular to an elastic dynamic compaction method and construction equipment, wherein an elastic device is arranged between a lifting device and a rammer; in the lifting process of the rammer, the elastic device gradually stretches the storage force under the action of the rammer; when the lifting device releases the ram, the elastic device applies elastic potential energy to the ram. The invention has the advantages that: the impact effect is ensured, the drop distance of the dynamic compaction can be reduced, and the accuracy of the compaction point can be ensured; the parameter adjustability in the dynamic compaction process is improved, the limit of the conventional construction conditions is broken through, the application scene and the range of the dynamic compaction construction are effectively expanded, and the construction cost is effectively reduced; simple and reasonable structure, convenient use and suitability for popularization.
Description
Technical Field
The invention relates to the technical field of foundation treatment, in particular to an elastic dynamic compaction method and construction equipment.
Background
The dynamic compaction process is one of conventional means for treating a foundation, and the dynamic compaction process is characterized in that a rammer is lifted to a certain height through a lifting device and then falls down freely, and the foundation soil body is compacted strongly by using the energy of the rammer, so that the bearing capacity and the compression modulus of the foundation are improved rapidly, and a uniform and compact foundation is formed.
Currently, dynamic compaction processes generally determine the drop distance of a ram by calculating an energy level, i.e., the impact energy level is equal to the weight of the ram x the drop distance x g (gravitational acceleration); the falling distance of a certain energy level is certain when the weight of the hammer is fixed, so that enough gravitational potential energy can be converted into kinetic energy to perform dynamic compaction on the foundation soil body.
However, in actual construction, the dynamic compaction process is limited in a very large number of conditions, for example: when the height limit is arranged in the construction site, but the fall distance corresponding to the tamping energy level required by foundation treatment is ultrahigh, the requirement of the tamping energy level has to be met by replacing the tamping hammer, so that the construction cost is increased; likewise, if only a rammer of a certain type is disposed in the construction site, the requirement of the ramming energy level can be met only by increasing the falling distance of the rammer, but the lifting height of the lifting device is limited, so that the rammer cannot rise infinitely on one hand, and the accuracy of the ramming point cannot be guaranteed and the construction risk increases along with the increase of the lifting height of the rammer.
Disclosure of Invention
According to the defects of the prior art, the invention provides the elastic dynamic compaction method and the construction equipment, and the elastic potential energy is additionally added to the rammer besides the gravitational potential energy of the rammer, so that the ramming energy level of the rammer is improved, and the lifting height of the rammer is reduced.
The invention is realized by the following technical scheme:
the utility model provides a spring dynamic compaction method, includes hoisting accessory and ram, the ram with hoisting accessory connects, makes hoisting accessory can with the ram lifts by crane to a take the altitude, its characterized in that: an elastic device is arranged between the lifting device and the rammer; in the lifting process of the rammer, the elastic device gradually stretches the storage force under the action of the rammer; when the lifting device releases the ram, the elastic device applies elastic potential energy to the ram.
The elastic potential energy applied by the elastic device to the rammer gradually rises along with the increase of the lifting height of the rammer, and the lifting height of the rammer is matched with the ultimate stretching length of the elastic device.
And a connecting device is arranged between the elastic device and the rammer, the rammer stretches the elastic device through the connecting device, and gravitational potential energy of the connecting device is applied to the rammer.
And comprehensively calculating the gravitational potential energy of the rammer and the elastic potential energy of the elastic device according to the ramming energy level required by the dynamic compaction method to obtain the lifting height of the rammer.
The construction equipment related to the elastic dynamic compaction method comprises a lifting device and a rammer, and is characterized in that: the construction equipment further comprises a portal frame, a baffle plate and an elastic device, wherein the portal frame is arranged on the periphery of a lifting point of the rammer, one end of the elastic device is connected with the bottom of the portal frame, the other end of the elastic device is connected with the baffle plate, the lifting device penetrates through the baffle plate to be connected with the rammer, and the rammer is in contact with the baffle plate.
A plurality of elastic devices are uniformly arranged around the baffle plate.
The baffle is a hollow circular ring that is arranged concentrically with the ram.
The invention has the advantages that: the impact effect is ensured, the drop distance of the dynamic compaction can be reduced, and the accuracy of the compaction point can be ensured; the parameter adjustability in the dynamic compaction process is improved, the limit of the conventional construction conditions is broken through, the application scene and the range of the dynamic compaction construction are effectively expanded, and the construction cost is effectively reduced; simple and reasonable structure, convenient use and suitability for popularization.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
fig. 3 is a comparison of the status of the ram of the present invention.
Description of the embodiments
The features of the invention and other related features are described in further detail below by way of example in conjunction with the following figures to facilitate understanding by those skilled in the art:
as shown in fig. 1-3, the labels 1-5 are shown as: the device comprises a lifting device 1, a rammer 2, a portal frame 3, an elastic device 4 and a baffle plate 5.
Examples: as shown in fig. 1 to 3, the construction equipment of the elastic dynamic compaction method in the embodiment comprises a lifting device 1 and a rammer 2, wherein the lifting device 1 and the rammer 2 form detachable connection, the rammer 2 can be lifted to a certain height through the lifting device 1, and when the connection is released, the rammer 2 utilizes gravitational potential energy to tamp foundation soil, so that foundation bearing capacity is effectively improved.
In this embodiment, an elastic acceleration device is disposed between the lifting device 1 and the rammer 2, and the elastic acceleration device has the function of enabling the rammer 2 to be additionally endowed with elastic potential energy besides gravitational potential energy of the rammer 2, so that the impact effect is ensured, meanwhile, the falling distance of the dynamic compaction is effectively reduced, and the accuracy of the compaction point is further improved.
Specifically, a portal frame 3 is arranged around the tamping point corresponding to the rammer 2, the bottom of the portal frame 3 is supported on the ground of a construction site, and the top of the portal frame 3 can be detachably connected with the cantilever of the lifting device 1, so that the structural stability of the portal frame 3 body is ensured. Elastic devices 4 are symmetrically arranged on two sides of the bottom of the portal frame 3, one end of each elastic device 4 can be connected with the portal frame 3 on the corresponding side through connecting pieces such as a buckle, the other ends of the two elastic devices 4 are fixedly connected with a baffle plate 5 respectively, and a steel wire rope of the lifting device 1 can penetrate through the baffle plate 5 to be connected with the rammer 2.
As shown in fig. 3, in use, the lifting device 1 lifts the ram 2 via the baffle 5, and since the ram 2 is in contact with the baffle 5, the lifting of the ram 2 simultaneously drives the baffle 5 upwards, and the baffle 5 simultaneously drives the elastic devices 4 on both sides to stretch. When the ram 2 reaches a certain height, the elastic means 4 is stretched to a certain length and the unhooking device is released. The rammer 2 moves in a free falling manner under the action of gravity, at this time, the elastic device 4 is recovered simultaneously (from the state (a) to the state (B) in fig. 3), the baffle 5 is driven to move downwards in an accelerating manner, the speed of the baffle 5 is transmitted to the rammer 2, and when the elastic device 4 is recovered to the initial position, the baffle 5 is separated from the rammer 2. This method allows the ram 2 to tamp at a better initial speed.
As shown in fig. 1, the conventional dynamic compaction method is to lift the ram 2 with the weight of m to a certain height H by using the lifting device 1, then release the ram 2 with energy being potential energy (i.e., e= mgH), then perform free-falling motion of the ram 2, and the conservation of energy at the ram 2 in the falling state is e=1/2 mv 1 2 + mgh, landing moment e=1/2 mv 2 2 . And then the energy is transferred to the foundation for foundation reinforcement.
For the elastic dynamic compaction method in this embodiment, an elastic accelerating device composed of an elastic device 4 and a baffle 5 is disposed at the height-limiting position of the rammer, the elastic device 4 is in a stretched state during the process of lifting the rammer 2 to the height H, the elastic device 4 is released after the rammer 2 is released, the elastic device 4 is rapidly recovered by its own resilience force, at this time, the energy of the rammer 2 is e= mgH +u (U is the elastic potential energy transferred from the elastic device 4 to the rammer 2), then the falling of the rammer 2, the elastic potential energy and the gravitational potential energy are simultaneously converted into kinetic energy, and the falling moment e=1/2 mv 2 ’ 2 . At this time, v 2 ' will be greater than the normal dynamic compaction final speed v 2 Therefore, the rammer 2 can transfer more energy to the foundation soil mass, thereby improving the dynamic compaction effect. In this process, when the weight of the ram is fixed and the required tamping energy level is fixed, the ram 2 in this embodiment only needs to be lifted to a relatively lower height, so as to ensure the accuracy of the tamping point.
In this embodiment, the rammer 2 in this embodiment has the gravitational potential energy of the rammer 2 itself and the elastic potential energy given by the elastic device 4, and also has the gravitational potential energy given by the baffle 5, so that the initial speed of the rammer 2 is further increased, and the ramming energy is improved. The baffle 5 in this embodiment may preferably be a hollow circular ring, wherein the aperture of the middle hole meets the requirement of the wire rope of the lifting device 1 to pass through, but the aperture is also smaller than the outer diameter of the rammer 2 and is concentrically arranged between the two, so as to ensure that the elastic device 4 and the baffle 5 can uniformly provide additional elastic potential energy and gravitational potential energy to the rammer 2, and ensure the ramming accuracy of the rammer 2.
The embodiment is implemented in specific manner: since the ramming energy level of the rammer 2 in this embodiment is provided by a multi-part device, including the gravitational potential energy of the rammer 2 itself, the elastic potential energy of the elastic means 4, and the gravitational potential energy of the baffle 5. Therefore, when the dynamic compaction is performed, the lifting height of the rammer 2, namely the drop distance of the rammer 2, can be obtained by comprehensively calculating the gravitational potential energy of the rammer 2, the elastic potential energy of the elastic device 4 and the gravitational potential energy of the baffle plate 5 according to the ramming energy level required by the dynamic compaction method.
In some cases, the drop distance of ram 2 can be dynamically adjusted according to field requirements. Specifically, since the ram drop distance in the present embodiment is smaller than that in the conventional dynamic compaction method, the present embodiment has a larger drop distance adjustment range in actual construction; therefore, for example, when the tamping energy level needs to be improved in a construction site, the tamping energy level of the dynamic compaction method can be improved only by continuously lifting the tamping hammer 2 upwards by a certain height on the basis of the initial lifting height without replacing the tamping hammer 2 and the lifting device 1, so that the weight limit of the tamping hammer 2 and the lifting height limit of the lifting device 1 in the conventional method are broken through, and the implementation of the dynamic compaction method construction is facilitated.
Although the foregoing embodiments have been described in some detail with reference to the accompanying drawings, it will be appreciated by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention as defined in the appended claims, and thus are not repeated herein.
Claims (7)
1. The utility model provides a spring dynamic compaction method, includes hoisting accessory and ram, the ram with hoisting accessory connects, makes hoisting accessory can with the ram lifts by crane to a take the altitude, its characterized in that: an elastic device is arranged between the lifting device and the rammer; in the lifting process of the rammer, the elastic device gradually stretches the storage force under the action of the rammer; when the lifting device releases the ram, the elastic device applies elastic potential energy to the ram.
2. The elastic dynamic compaction method according to claim 1, wherein: the elastic potential energy applied by the elastic device to the rammer gradually rises along with the increase of the lifting height of the rammer, and the lifting height of the rammer is matched with the ultimate stretching length of the elastic device.
3. The elastic dynamic compaction method according to claim 1, wherein: and a connecting device is arranged between the elastic device and the rammer, the rammer stretches the elastic device through the connecting device, and gravitational potential energy of the connecting device is applied to the rammer.
4. The elastic dynamic compaction method according to claim 1, wherein: and comprehensively calculating the gravitational potential energy of the rammer and the elastic potential energy of the elastic device according to the ramming energy level required by the dynamic compaction method to obtain the lifting height of the rammer.
5. Construction equipment related to the elastic dynamic compaction method according to any one of claims 1-4, comprising a hoisting device and a rammer, and characterized in that: the construction equipment further comprises a portal frame, a baffle plate and an elastic device, wherein the portal frame is arranged on the periphery of a lifting point of the rammer, one end of the elastic device is connected with the bottom of the portal frame, the other end of the elastic device is connected with the baffle plate, the lifting device penetrates through the baffle plate to be connected with the rammer, and the rammer is in contact with the baffle plate.
6. The construction equipment for the elastic dynamic compaction method according to claim 5, wherein the construction equipment comprises: a plurality of elastic devices are uniformly arranged around the baffle plate.
7. The construction equipment for the elastic dynamic compaction method according to claim 5, wherein the construction equipment comprises: the baffle is a hollow circular ring that is arranged concentrically with the ram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371126.9A CN116537152A (en) | 2023-04-10 | 2023-04-10 | Elastic dynamic compaction method and construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371126.9A CN116537152A (en) | 2023-04-10 | 2023-04-10 | Elastic dynamic compaction method and construction equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116537152A true CN116537152A (en) | 2023-08-04 |
Family
ID=87453262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310371126.9A Pending CN116537152A (en) | 2023-04-10 | 2023-04-10 | Elastic dynamic compaction method and construction equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116537152A (en) |
-
2023
- 2023-04-10 CN CN202310371126.9A patent/CN116537152A/en active Pending
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