CN110055948A - A kind of big Treatment Methods of Karst Foundation of depth and device - Google Patents
A kind of big Treatment Methods of Karst Foundation of depth and device Download PDFInfo
- Publication number
- CN110055948A CN110055948A CN201910353872.9A CN201910353872A CN110055948A CN 110055948 A CN110055948 A CN 110055948A CN 201910353872 A CN201910353872 A CN 201910353872A CN 110055948 A CN110055948 A CN 110055948A
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- punching
- solution cavity
- gravelly soil
- karst
- foundation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- 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
-
- 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
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Foundations (AREA)
Abstract
A kind of big Treatment Methods of Karst Foundation of depth, the method carry out strong rammer pretreatment (5) to solution cavity (1) bottom plate；Solution cavity is filled to Karst roof position with gravelly soil (6)；Impact extrusion gravelly soil is hammered into shape using punching, until punching is formed on solution cavity bottom；It is refilled at gravelly soil to Karst roof position, is hammered into shape using punching and squeeze gravelly soil, until punching is formed on solution cavity bottom；Repeat again the filling and impact extrusion of next stage gravelly soil (8)；Borehole cleaning processing is carried out to the stake holes of completion；The construction of pile foundation (10), form compound foundation can be carried out on this basis.The present invention is directed to large and medium-sized solution cavity problem, fills the good gravelly soil of compactness, basis is made to have better stability, and construction technology is simple, economical and practical using gravelly soil, environmentally protective, therefore has good prospect of the application.And the gravelly soil materials filled are convenient, and cost is relatively low.
Description
Technical field
The present invention relates to a kind of big Treatment Methods of Karst Foundation of depth and device, dependent territory to build technical field of construction.
Background technique
Karst exists generally, the building in Southwestern China mountain area is applied as a kind of unfavorable geology disaster in In Limestone Area
It is even more to frequently encounter during work.The method of conventional process solution cavity generallys use cement grouting, concrete or other waste residues to fill
Solution cavity is filled out, or pile foundation is used to pass through the method for solution cavity with consolidated subsoil.But when solution cavity to be treated is compared with deep, range is larger
When, if continuing the method using material filling, it will appear that consumptive material is serious, uneconomic phenomenon, therefore this method is no longer applicable in.
When conventionally employed pile foundation passes through, spillage, necking down and collapse hole are easily caused in stake holes forming process, and when concrete perfusion, be easy
Cause the superfilled amount of concrete, fullness coefficient high, and pile foundation bottom lacks firm pier.
Summary of the invention
The object of the present invention is to deficiency in view of the above technology, the present invention proposes a kind of big Treatment Methods of Karst Foundation of depth
And device.
The technical solution that the present invention realizes is as follows, and a kind of big Treatment Methods of Karst Foundation of depth, the method is to solution cavity bottom plate
Carry out strong rammer pretreatment；Solution cavity is filled to Karst roof position with gravelly soil；Impact extrusion gravelly soil is hammered into shape using punching, until solution cavity bottom
Form punching；It is refilled at gravelly soil to Karst roof position, is hammered into shape using punching and squeeze gravelly soil, until punching is formed on solution cavity bottom
Hole；Repeat again the filling and impact extrusion of next stage gravelly soil；Borehole cleaning processing is carried out to the stake holes of completion；It on this basis can be into
The construction of row pile foundation, form compound foundation.
Specific step is as follows for a kind of big Treatment Methods of Karst Foundation of depth:
(1) advance drilling geological mapping: determining solution cavity development range and spatial shape, and deep drilling verifies the form and solution cavity of solution cavity
Interior water-filling fills mud situation；
(2) punch work platform is set up in basement process point be punched out construction；
(3) pretreatment of solution cavity bottom plate is carried out；
(4) at gravelly soil filling solution cavity to Karst roof position, impact extrusion gravelly soil then is hammered into shape using punching, gravelly soil can rush
Under drift effect, to two sides solution cavity cavity rolling extrusion, until punching is formed on punching hammer punching to solution cavity bottom；
(5) backfill and compacting for carrying out next stage gravelly soil are refilled with rubble that is, into the punching of the step (4) formation
At soil to Karst roof position, further uses punching and hammer punching into shape to solution cavity bottom；
(6) techniqueflow for repeating step (5), carries out again the filling and impact extrusion of next stage gravelly soil；When punching rubble is hammered in punching into shape
Number of shocks needed for soil to bottom plate, when number of shocks needed for differential settlement identical as general soil layer arrival is impacted is consistent, then at this
After the completion of level punching, the backfill of gravelly soil is no longer carried out；
(7) borehole cleaning processing is carried out to the stake holes that step (6) are completed, then can carries out the construction of pile foundation on this basis, formed multiple
Close ground.
The frequency of the punching is 2 times/min-5 times/min, stroke 1-3m.
The solution cavity bottom plate pretreatment, 3 ~ 10 tons of punching hammer, which is promoted to certain altitude, using hoist engine makes under its freedom
It falls, tamps solution cavity bottom plate using powerful tamping energy.
The pile foundation includes reinforced concrete pile, broken stone pile or CFG.
The punched hole construction includes smooth location, clears up construction site；It is in place to place perforating press for measure of pile position setting-out；It buries
If casing is punched out operation, boulder layer is encountered, explosion is carried out using stake stone hole；Complete punching in punching to solution cavity position.
The method can be used for clump of piles processing.
A kind of big karst ground treatment device of depth of the present invention, including hoist engine, punching hammer, casing and punch work platform；
The punch work platform is arranged on the ground outside karst hole；Hoist engine is mounted on punch work platform；Punching hammer peace
On perforating press, drawn by the guide rod of hoist engine；Casing be it is columnar structured, casing vertical level is mounted under hoist engine
Side；Punching hammer does up-and-down motion in casing, and compacting solution cavity bottom plate, punching are completed under the traction of hoist engine and is stood
Stake.
The invention has the advantages that the present invention is directed to large and medium-sized solution cavity problem, the good gravelly soil of compactness is filled, is made
There is better stability on basis, and construction technology is simple, economical and practical using gravelly soil, environmentally protective, thus have make well
Use prospect.And the gravelly soil materials filled are convenient, and cost is relatively low.
Detailed description of the invention
Fig. 1 is general deep big karst schematic diagram；Fig. 2 is that Upper Plate of Karst Cave schematic diagram is worn in punching hammering；
Fig. 3 is rubble earthen backfill schematic diagram；Fig. 4 is punching hammering blow gravelly soil pore-forming schematic diagram；
Fig. 5 is next stage rubble earthen backfill schematic diagram；Fig. 6 is that next stage gravelly soil hammers punching schematic diagram；
Fig. 7 is armored concrete pile composite foundation schematic diagram；Fig. 8 is replacement stone pile composite foundation schematic diagram；
Fig. 9 is CFG pile composite foundation schematic diagram；Figure 10 is that a clump of piles handles big karst schematic diagram；
In figure, 1 is deep big karst；2 be punch work platform；3 be punching hammer；4 be general soil layer；5 be that solution cavity jacking of floor is pre-
Processing；6 be gravelly soil；7 be impact holing；8 be next stage rubble earthen backfill；9 be next stage impact holing；10 be reinforced concrete
Native stake；11 be broken stone pile；12 be CFG；13 be a clump of piles.
Specific embodiment
A specific embodiment of the invention is as shown in the picture.
A kind of big Treatment Methods of Karst Foundation of depth of the present embodiment, specifically includes the following steps:
Step 1, advance drilling geological mapping: determine that solution cavity 1 develops range and spatial shape, deep drilling verifies the form of solution cavity 1
And water-filling in solution cavity 1, fill mud situation.
Step 2, it sets up punch work platform 2 and is punched out construction: mainly including 1) smooth location, clearing up construction site；
2) it is in place to place perforating press for measure of pile position setting-out；3) casing is buried, operation is punched out, encounters boulder layer, using stake Shi Kongjin
Row explosion；4) punching is completed in punching to 1 position of solution cavity, wherein the punching frequency is 2 times/min-5 times/min, stroke 1-3m.
Step 3, the pretreatment of 1 bottom plate of solution cavity is carried out:
3 pairs of 1 bottom plates of solution cavity are hammered into shape using punching and carry out strong rammer pretreatment, and 3 ~ 10 tons of punching hammer 3 is promoted to one using hoist engine
It is fixed highly to make its free-falling, solution cavity bottom plate is tamped using powerful tamping energy, as shown in Figure 2.
Step 4, it is filled at solution cavity 1 to Karst roof position with gravelly soil 6, as shown in figure 3, then hammering impact extrusion into shape using punching
Gravelly soil 6, gravelly soil can be in the case where 3 effects be hammered in punching into shape, to two sides solution cavity cavity rolling extrusion, until punching hammer is rushed to solution cavity bottom
Punching is formed, as shown in Figure 4.
Step 5, the backfill and compacting of next stage gravelly soil is carried out to be refilled with that is, into the punching of the step 4 formation
At gravelly soil 5 to Karst roof position, as shown in Figure 5.It further uses punching and hammers punching into shape to solution cavity bottom, as shown in Figure 6.
Step 6, the techniqueflow of step 5 is repeated, the filling and impact extrusion of next stage gravelly soil are carried out again.When 3 punching of punching hammer
Number of shocks needed for hole gravelly soil to bottom plate, when consistent with number of shocks needed for general soil layer 4 reaches identical differential settlement is impacted,
Then after the completion of the level punching, the backfill of gravelly soil is no longer carried out.
Step 7, borehole cleaning processing is carried out to the stake holes that step 6 is completed, then can carries out reinforced concrete pile on this basis
The construction of (as shown in Figure 7), broken stone pile (as shown in Figure 8) or CFG (as shown in Figure 9), form compound foundation.
The operating condition excessive for solution cavity horizontal area range, as shown in Figure 10, single pile is not enough to play the work of consolidated subsoil
The inventive method can be used in used time, carries out multi-column pier foundation construction.
The method for so using classification backfill gravelly soil and shock ramming is constructed, can be existing molten using pile foundation processing
On the basis of hole, solid pier is formed in pile foundation lower part, makes list (group) stake that there is better stability.
Claims (8)
1. a kind of big Treatment Methods of Karst Foundation of depth, which is characterized in that the method carries out strong rammer pretreatment to solution cavity bottom plate；With
Gravelly soil fills solution cavity to Karst roof position；Impact extrusion gravelly soil is hammered into shape using punching, until punching is formed on solution cavity bottom；It is refilled with
It at gravelly soil to Karst roof position, is hammered into shape using punching and squeezes gravelly soil, until punching is formed on solution cavity bottom；Repeat next stage again
The filling and impact extrusion of gravelly soil；Borehole cleaning processing is carried out to the stake holes of completion；The construction of pile foundation can be carried out on this basis, formed multiple
Close ground.
2. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 1, which is characterized in that the specific step of the method
It is rapid as follows:
(1) advance drilling geological mapping: determining solution cavity development range and spatial shape, and deep drilling verifies the form and solution cavity of solution cavity
Interior water-filling fills mud situation；
(2) punch work platform is set up in basement process point be punched out construction；
(3) pretreatment of solution cavity bottom plate is carried out；
(4) at gravelly soil filling solution cavity to Karst roof position, impact extrusion gravelly soil then is hammered into shape using punching, gravelly soil can rush
Under drift effect, to two sides solution cavity cavity rolling extrusion, until punching is formed on punching hammer punching to solution cavity bottom；
(5) backfill and compacting for carrying out next stage gravelly soil are refilled with rubble that is, into the punching of the step (4) formation
At soil to Karst roof position, further uses punching and hammer punching into shape to solution cavity bottom；
(6) techniqueflow for repeating step (5), carries out again the filling and impact extrusion of next stage gravelly soil；When punching rubble is hammered in punching into shape
Number of shocks needed for soil to bottom plate, when number of shocks needed for differential settlement identical as general soil layer arrival is impacted is consistent, then at this
After the completion of level punching, the backfill of gravelly soil is no longer carried out；
(7) borehole cleaning processing is carried out to the stake holes that step (6) are completed, then can carries out the construction of pile foundation on this basis, formed multiple
Close ground.
3. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 2, which is characterized in that the frequency of the punching is
2 times/min-5 times/min, stroke 1-3m.
4. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 2, which is characterized in that the solution cavity bottom plate is located in advance
Reason, 3 ~ 10 tons of punching hammer, which is promoted to certain altitude, using hoist engine makes its free-falling, is tamped using powerful tamping energy
Solution cavity bottom plate.
5. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 2, which is characterized in that the pile foundation includes reinforcing bar
Concrete-pile, broken stone pile or CFG.
6. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 2, which is characterized in that the punched hole construction includes
Smooth location clears up construction site；It is in place to place perforating press for measure of pile position setting-out；Embedded casing, is punched out operation, encounters
Boulder layer carries out explosion using stake stone hole；Complete punching in punching to solution cavity position.
7. the big Treatment Methods of Karst Foundation of a kind of depth according to claim 1, which is characterized in that the method can be used for group
Stake processing.
8. a kind of big karst ground treatment device of depth, which is characterized in that described device includes hoist engine, punching hammer, casing and punching
Hole workbench；The punch work platform is arranged on the ground outside karst hole；Hoist engine is mounted on punch work platform
On；Punching hammer is mounted on perforating press, is drawn by the guide rod of hoist engine；Casing is columnar structured, casing vertical level peace
Below hoist engine；Punching hammer does up-and-down motion in casing, and compacting solution cavity is completed under the traction of hoist engine
Bottom plate, punching and staking out.
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| CN201910353872.9A CN110055948A (en) | 2019-04-29 | 2019-04-29 | A kind of big Treatment Methods of Karst Foundation of depth and device |
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| CN201910353872.9A CN110055948A (en) | 2019-04-29 | 2019-04-29 | A kind of big Treatment Methods of Karst Foundation of depth and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112001014A (en) * | 2020-08-24 | 2020-11-27 | 湖南大学 | Method for treating karst cave area foundation by dynamic compaction |
| CN113931161A (en) * | 2021-10-29 | 2022-01-14 | 贵州建工集团第一建筑工程有限责任公司 | Dynamic compaction treatment method for karst landform foundation |
| CN114108675A (en) * | 2021-12-06 | 2022-03-01 | 中冶集团武汉勘察研究院有限公司 | Pile forming method for pile foundation in karst area |
| CN115492088A (en) * | 2022-09-28 | 2022-12-20 | 中铁二院昆明勘察设计研究院有限责任公司 | Pile forming method for CFG (cement fly-ash gravel) pile bottom expanding grouting in karst region |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112001014A (en) * | 2020-08-24 | 2020-11-27 | 湖南大学 | Method for treating karst cave area foundation by dynamic compaction |
| CN113931161A (en) * | 2021-10-29 | 2022-01-14 | 贵州建工集团第一建筑工程有限责任公司 | Dynamic compaction treatment method for karst landform foundation |
| CN114108675A (en) * | 2021-12-06 | 2022-03-01 | 中冶集团武汉勘察研究院有限公司 | Pile forming method for pile foundation in karst area |
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| CN115492088A (en) * | 2022-09-28 | 2022-12-20 | 中铁二院昆明勘察设计研究院有限责任公司 | Pile forming method for CFG (cement fly-ash gravel) pile bottom expanding grouting in karst region |
| CN115492088B (en) * | 2022-09-28 | 2023-09-12 | 中铁二院昆明勘察设计研究院有限责任公司 | Pile forming method for pile bottom enlarged grouting CFG pile in karst region |
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