CN114673134A - Solid-gas coupling one-ramming multi-impact rammer device - Google Patents
Solid-gas coupling one-ramming multi-impact rammer device Download PDFInfo
- Publication number
- CN114673134A CN114673134A CN202210540932.XA CN202210540932A CN114673134A CN 114673134 A CN114673134 A CN 114673134A CN 202210540932 A CN202210540932 A CN 202210540932A CN 114673134 A CN114673134 A CN 114673134A
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- rammer
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- 230000008878 coupling Effects 0.000 title claims abstract description 7
- 238000010168 coupling process Methods 0.000 title claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 7
- 230000000903 blocking effect Effects 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
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
-
- 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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of solid-gas coupling one rammer device that many hits, the fixed rammer hammer of the underpart of the supporting cylinder of the device is used for ramming the soil body of road bed for the first time, then the sliding rammer hammer slides downward and strikes the fixed rammer hammer and ram ramms for the second time, because the falling speed of the rammer device is very fast, but the interval between sliding rammer hammer and the fixed rammer hammer is limited, so the interval time of ramming for two times is very short, can reach the effect of ramming for two times, rammer for two times makes the rammer hammer device ram the time of the soil body lengthen, will receive rammer of the rammer hammer device again when the reflected vibration wave of rammer for one time returns to the road bed surface, reflect the vibration wave continuously, can discharge the water in the soil rapidly, and raise the bearing depth of the soil body of road bed greatly; the air separation ring that the terminal surface set up under the fixed ram is used for forming the air cushion when ramming, and the cushioning effect of air cushion can effectively reduce speed of ramming and frequency of ramming, makes the energy distribution of ramming more even, can effectively solve the problem that high liquid limit soil road bed ramming was difficult.
Description
Technical Field
The invention relates to the technical field of civil engineering soft foundation treatment, in particular to a solid-gas coupling one-ramming multi-impact ramming device.
Background
High liquid limit soil refers to soil with a particle content of less than 0.075mm greater than 50%, a liquid limit greater than 50%, and a plasticity index greater than 26. The high liquid limit soil is mainly characterized by poor compactibility, larger compressibility and obvious strain softening after compaction. The road bed surface layer bears the action force of driving the vehicle the most, from the top downwards, and the atress reduces sharply, and under the effect of general car load, its influence degree of depth is 1.0 ~ 2.0m scope, and its influence degree of depth can reach 2.9m to heavier car, therefore to the road bed of filling high liquid limit soil, it is the key of road bed quality to how to tamp the road bed and satisfy the strength requirement. The vibration that the road bed ramming in-process caused is propagated to the underground with the form of shock wave in soil, the compression wave (longitudinal wave) most in the shock wave passes through liquid phase motion, make the pore water pressure increase gradually, make the soil body skeleton disintegrate, and the shear wave (shear wave) that reaches afterwards makes the soil body granule of disintegrating be in more closely knit state, and current rammer device is single hammer ramming usually, the time of ramming at every turn is short, can not reflect the shock wave in succession, be unfavorable for discharging the water in the soil rapidly, be unfavorable for improving the depth of force of the soil body.
Disclosure of Invention
In order to solve the problems, the invention provides a solid-gas coupling-ramming multi-impact ramming hammer device.
The technical scheme of the invention is as follows: a solid-gas coupling one-rammer multi-strike rammer device comprises a circular supporting cylinder, a cylindrical fixed rammer and a cylindrical sliding rammer; the fixed rammer is fixedly sleeved on the lower portion of the supporting barrel, the bottom surface of the fixed rammer is flush with the bottom surface of the supporting barrel, the sliding rammer is slidably sleeved on the upper portion of the supporting barrel, a lifting lug is arranged in the middle of the upper surface of the sliding rammer, and a plurality of limiting baffle plates extending into the port of the supporting barrel are uniformly distributed on the upper end surface of the supporting barrel in the circumferential direction.
Preferably, the bottom surface of the fixed rammer is coaxially provided with an air blocking ring, and the outer diameter of the air blocking ring is the same as the diameter of the fixed rammer.
Preferably, the inner surface of the air blocking ring is a tapered surface, and the air blocking ring is formed in a flared shape that opens downward.
Preferably, a plurality of air channels which are communicated up and down are uniformly distributed in the fixed rammer, and the air channels are arranged along the radial direction.
Preferably, the air channel comprises a circular channel at the lower half part and a circular truncated cone-shaped channel at the upper half part, and the small-size end of the circular truncated cone-shaped channel is connected with the circular channel.
Preferably, the middle part of the air channel in the fixed rammer is provided with a sand blocking net.
Preferably, the height of the support cylinder is 1.5m, the diameter of the fixed ram is 1.3m, the height of the fixed ram is 0.5m, and the diameter of the sliding ram is 1.3m, and the height of the sliding ram is 0.5 m.
The beneficial technical effects of the invention are as follows:
(1) the fixed rammer at the lower end of the supporting cylinder body is used for ramming a roadbed soil body for the first time, then the sliding rammer slides downwards to impact the fixed rammer for secondary ramming, the falling speed of the ramming device is high, but the distance between the fixed rammer and the sliding rammer is limited, so that the interval time of the two times of ramming is short, the effect of one ramming and two times of ramming can be achieved, the time for ramming the soil body by the ramming device is prolonged by the two times of ramming, when the reflected vibration wave of one time of ramming returns to the surface of a roadbed, the ramming energy of the ramming device can be used again, the vibration wave is continuously reflected, water in the soil can be quickly drained away, and the stress depth of the roadbed soil body is greatly improved.
(2) The air blocking ring arranged on the bottom surface of the fixed rammer can form a closed space with roadbed soil during ramming, the closed space can effectively prevent air between the bottom surface of the fixed rammer and the soil from diffusing outwards, and an air cushion is formed at the lower end of the fixed rammer; the air passage that sets up in the fixed rammer is used for supporting the inside cavity of barrel and the intra-annular airtight space intercommunication of air separation, ram the air in the in-process slip rammer gliding compression cavity, it is intra-annular to make it enter into the air separation from air passage, can form the air cushion at fixed rammer lower extreme once more, the cushioning effect of air cushion can effectively reduce speed of ramming and the frequency of ramming, be favorable to the transmission of the energy of ramming, the energy distribution that makes the rammer hit is more even, the effect of ramming is better, can effectively solve the problem of high liquid limit soil road bed ramming difficulty.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a sectional view taken along line B-B of FIG. 3;
FIG. 5 is a schematic bottom view of the present invention;
FIG. 6 is a schematic perspective view of the stationary ram of the present invention.
In the figure, 11, a supporting cylinder body, 111, a limit baffle, 12, a fixed rammer, 13, a sliding rammer, 131, a lifting lug, 14, an air blocking ring, 141, a conical surface, 15, an air channel, 151, a circular channel, 152, a truncated cone-shaped channel and 16, a sand blocking net.
Detailed Description
First embodiment, referring to the attached figures 1-6 of the specification, a solid-gas coupling one-ramming multi-strike ramming device comprises a circular supporting cylinder, a cylindrical fixed rammer and a cylindrical sliding rammer; the fixed suit of fixed ram is in the lower part of supporting the barrel, the bottom surface of fixed ram and the bottom surface parallel and level of support barrel, the slip ram slip suit is on the upper portion of supporting the barrel, leave certain clearance between slip ram and the support barrel, be equipped with the lug in the middle of the upper surface of slip ram, this lug is used for articulating the lifting rope, the up end of support barrel has a plurality of to stretch into this to support intraoral limit baffle of barrel along the circumferencial direction equipartition, when upwards pulling up the ram device through the lug, the slip ram upwards slides in the support barrel earlier, limit baffle keeps off the up end at the slip ram when sliding to support barrel up end, the slip ram stops sliding, continue upwards to pull up and pull up the ram device.
The fixed ram of downward slip striking of slip ram in the support barrel is in order to realize the secondary ramming, and at this in-process, the support barrel can play the effect to slip ram sliding guide, makes the stress point of the upper surface of the fixed ram of slip ram striking concentrate, can improve the impact of secondary striking.
The bottom surface of the fixed rammer is coaxially provided with an air blocking ring, and the outer diameter of the air blocking ring is the same as the diameter of the fixed rammer; the inner side surface of the air blocking ring is a conical surface, a downward opening bell mouth shape is formed in the air blocking ring, the downward opening bell mouth can change the stress direction of air entering the air blocking ring, the downward pressure of the air blocking ring to the inside air is enhanced, and the pressure of a generated air cushion is improved.
The fixed rammer in evenly distributed have a plurality of air passage that link up from top to bottom, air passage is along radially arranging, air passage includes the circular passageway of lower half and the first round platform shape passageway, the small-size end and the circular passageway of round platform shape passageway are connected, round platform shape passageway forms the gaseous passageway of water conservancy diversion at the upper surface of fixed rammer, when the inside air of the compression support barrel of slip rammer lapse, can let in the inner space of air separation ring with the inside air of the support barrel with higher speed, improve the pressure of air cushion. In addition, the structure with the wide upper part and the narrow lower part of the air channel can also play a role in blocking sand and stone from entering the supporting cylinder body.
The middle part of the supporting cylinder body is fixed with a sand blocking net, the bottom surface of the sand blocking net is attached to the upper surface of the fixed rammer, sand stones in the roadbed can be bounced into the supporting cylinder body from the air channel in the ramming process, the sand blocking net can block the sand stones from entering the supporting cylinder body, the sand stone pad is prevented from being arranged between the sliding rammer and the fixed rammer, and the ramming effect of secondary ramming is guaranteed. The sand blocking net can be arranged in the middle of the air channel, so that the sand blocking net can be prevented from being damaged by tamping of the sliding rammer, and the service life of the sand blocking net is prolonged.
The height of the supporting cylinder body is set to be 1.5m, the diameter of the fixed rammer is set to be 1.3m, the height of the fixed rammer is set to be 0.5m, the diameter of the sliding rammer is set to be 1.3m, the height of the sliding rammer is set to be 0.5m, and the height of the air blocking ring is set to be 0.1 m.
The using process and principle of the invention are as follows:
when the rammer device is used for ramming operation, a lifting rope of a lifting device is connected into a lifting lug of a sliding rammer, the lifting device starts to pull the rammer device upwards through the lifting rope, the sliding rammer is stressed to slide upwards in a supporting cylinder firstly, a limit baffle is blocked on the upper end face of the sliding rammer when the sliding rammer slides to the upper end opening of the supporting cylinder, the sliding rammer stops moving, the rammer device is pulled upwards continuously, then the lifting device releases the lifting rope, the rammer device falls, a fixed rammer at the lower end of the supporting cylinder contacts roadbed soil mass for the first ramming, then the sliding rammer slides downwards to impact the fixed rammer for the second ramming, the falling speed of the rammer device is high, but the distance between the fixed rammer and the sliding rammer is limited, the interval time of two rammers is short, the effect of one rammer and two rammers is achieved, and the rammer device prolongs the ramming time of the rammer device for ramming the soil mass by one rammer and two rammers, when the reflected vibration wave of one-time ramming returns to the surface of the roadbed, the vibration wave is subjected to the ramming energy action of the ramming hammer device again, the vibration wave is continuously reflected, water in soil can be rapidly drained away, and the stress depth of the roadbed soil body is greatly improved.
Claims (7)
1. The utility model provides a rammer device is hit more to solid gas coupling unification rammer which characterized by:
comprises a circular supporting cylinder, a cylindrical fixed rammer and a cylindrical sliding rammer;
the fixed rammer is fixedly sleeved on the lower portion of the supporting barrel, the bottom surface of the fixed rammer is flush with the bottom surface of the supporting barrel, the sliding rammer is slidably sleeved on the upper portion of the supporting barrel, a lifting lug is arranged in the middle of the upper surface of the sliding rammer, and a plurality of limiting baffle plates extending into the port of the supporting barrel are uniformly distributed on the upper end surface of the supporting barrel in the circumferential direction.
2. The solid-gas coupling-ramming multi-strike ramming device of claim 1, wherein: the bottom surface of the fixed rammer is coaxially provided with an air blocking ring, and the outer diameter of the air blocking ring is the same as the diameter of the fixed rammer.
3. The solid-gas coupling-ramming multi-strike ramming device of claim 2, wherein: the inner side surface of the air blocking ring is a conical surface, and a flared opening shape which is opened downwards is formed in the air blocking ring.
4. The solid-gas coupling-ramming multi-strike ramming device of claim 3, wherein: a plurality of air channels which are communicated up and down are uniformly distributed in the fixed rammer, and the air channels are arranged along the radial direction.
5. The solid-gas coupling-ramming multi-strike ramming device of claim 4, wherein: the air channel comprises a circular channel at the lower half part and a circular truncated cone-shaped channel at the upper half part, and the small-size end of the circular truncated cone-shaped channel is connected with the circular channel.
6. The solid-gas coupling-ramming multi-strike ramming device of claim 4, wherein: and a sand blocking net is arranged in the middle of the air channel in the fixed rammer.
7. The solid-gas coupling-ramming multi-strike ramming device of claim 1, wherein: the height of the supporting cylinder body is set to be 1.5m, the diameter of the fixed rammer is set to be 1.3m, the height of the fixed rammer is set to be 0.5m, the diameter of the sliding rammer is set to be 1.3m, and the height of the sliding rammer is set to be 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540932.XA CN114673134B (en) | 2022-05-19 | 2022-05-19 | Solid-gas coupling one-rammer multi-rammer device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540932.XA CN114673134B (en) | 2022-05-19 | 2022-05-19 | Solid-gas coupling one-rammer multi-rammer device |
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| Publication Number | Publication Date |
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| CN114673134A true CN114673134A (en) | 2022-06-28 |
| CN114673134B CN114673134B (en) | 2023-08-22 |
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| CN202210540932.XA Active CN114673134B (en) | 2022-05-19 | 2022-05-19 | Solid-gas coupling one-rammer multi-rammer device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960607A (en) * | 2022-07-12 | 2022-08-30 | 中化岩土集团股份有限公司 | Progressive dynamic compaction construction method and construction equipment thereof |
| CN116356647A (en) * | 2023-03-22 | 2023-06-30 | 江阴华信建设工程有限公司 | Rammed earth structure for municipal engineering road pavement |
| CN118127879A (en) * | 2024-05-06 | 2024-06-04 | 河南远辰祥建设工程有限公司 | Compacting equipment for paving hydraulic engineering pavement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960607A (en) * | 2022-07-12 | 2022-08-30 | 中化岩土集团股份有限公司 | Progressive dynamic compaction construction method and construction equipment thereof |
| CN116356647A (en) * | 2023-03-22 | 2023-06-30 | 江阴华信建设工程有限公司 | Rammed earth structure for municipal engineering road pavement |
| CN116356647B (en) * | 2023-03-22 | 2023-10-24 | 江阴华信建设工程有限公司 | Rammed earth structure for municipal engineering road pavement |
| CN118127879A (en) * | 2024-05-06 | 2024-06-04 | 河南远辰祥建设工程有限公司 | Compacting equipment for paving hydraulic engineering pavement |
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| Publication number | Publication date |
|---|---|
| CN114673134B (en) | 2023-08-22 |
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