CN212742608U - Soft soil foundation pile group semi-supported disc pile foundation structure - Google Patents
Soft soil foundation pile group semi-supported disc pile foundation structure Download PDFInfo
- Publication number
- CN212742608U CN212742608U CN202022213253.0U CN202022213253U CN212742608U CN 212742608 U CN212742608 U CN 212742608U CN 202022213253 U CN202022213253 U CN 202022213253U CN 212742608 U CN212742608 U CN 212742608U
- Authority
- CN
- China
- Prior art keywords
- pile
- foundation
- stake
- soft soil
- bottom plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002689 soil Substances 0.000 title claims abstract description 53
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 238000007569 slipcasting Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 230000003487 anti-permeability effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005056 compaction Methods 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000003776 cleavage reaction Methods 0.000 abstract description 2
- 230000007017 scission Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a soft soil foundation pile half tray pile foundation structure, including the half tray of big bottom plate and drilling mud jacking stake, software foundation cleavage slip casting, the bottom of big bottom plate is provided with drilling mud jacking stake the pile outside 0.5 ~ 1.0 times stake footpath department of the adjacent stake inter-pile point department of drilling mud jacking stake group stake, the limit stake of group stake or angle stake sets up half tray, the thickness of half tray is not less than 2 ~ 3 stake footpaths. The utility model adopts the drilling mud jacking pile foundation and the soft soil foundation group pile semi-supporting disc foundation treatment technology for the thicker soft soil foundation, which can effectively improve the bearing capacity/reduce the settlement volume, the settlement difference and the gradient of the building; the drilling mud jacking pile is more beneficial to compacting soil among piles than a precast pile, and the split grouting/pressure stabilizing grouting technology enables the foundation to have the characteristic of a composite foundation; the construction of the pile group semi-supporting disc after pile forming is simple in construction process relative to the supporting disc pile, and secondary compaction can be realized on foundation soil to enable the foundation soil to be more compact.
Description
Technical Field
The utility model relates to a soft soil foundation pile foundation engineering technical field, in particular to soft soil foundation pile group half-supporting disk pile foundation structure.
Background
The basic construction speed of China is rapidly developed along with the rapid increase of the economic construction speed. Some industrial buildings such as energy, chemical and petrochemical buildings need to be far away from social living environment and are built in regional territories which are not easy to build human and civil living environment. Such regional geographical geological environmental conditions are relatively unsatisfactory, soft soil foundation problems are generally easy to exist, large settlement, uneven settlement and other phenomena are easy to generate due to poor treatment of building foundation, damage accidents such as cracking and collapse of the building and the like are caused, equipment pipeline breakage, serious deformation, incapability of running and other matters affect the orderly running of normal production and life, and social development speed and stable life problems are seriously affected.
The foundation treatment of the soft soil foundation is important due to high importance level of bearing equipment and building (structure) and high manufacturing cost, and millions of foundation treatment can be realized with slight careless loss. At present, the project cases are gradually highlighted, and even some projects adopt pile foundations, the projects cannot be fortunate. Engineering hazards which are possible to settle, crack, stop production and are difficult to repair or incapable of being repaired occur in backfill areas/blow-fill areas of coastal seas, regions with gully and soft soil of the beach, regions with unfavorable long-term constant load effect on pile foundation treatment and the like. The main reasons of the harm are mostly represented by insufficient foundation compactness and high underground water level, the settlement is continuous under the constant load long-term action, the settlement observation records are represented by continuous linear settlement, the settlement amount is as high as 360-460 mm within short 4-5 years, and related group enterprise companies cry and do not repeat. Of course, the problem of soft soil foundation settlement has been a long standing problem. Engineering technicians struggle to solve the problem of settlement on the road and struggle with the situation.
SUMMERY OF THE UTILITY MODEL
In order to solve at least or partially the above problems, a soft soil foundation pile half-supported disc pile foundation structure is provided.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model relates to a soft soil foundation pile half tray pile foundation structure, including the half tray of big bottom plate and drilling mud jacking stake, software foundation cleavage slip casting, its characterized in that, the bottom of big bottom plate is provided with drilling mud jacking stake 0.5 ~ 1.0 times stake footpath department sets up half tray in the adjacent stake interlude department of drilling mud jacking stake group stake, the limit stake of group stake or the group stake outside of angle stake, the thickness of half tray is not less than 2 ~ 3 stake footpaths.
As an optimal technical scheme the 6 ~ 8m departments of big bottom plate are provided with the half dish of second, the thickness of the half dish of second is not less than 2 ~ 3 times stake footpaths.
As an optimal technical scheme of the utility model, the reinforcing bar of big bottom plate bottom needs to be located the top of the pile head of drilling mud jacking stake.
As an optimal technical scheme of the utility model, big bottom plate is reinforced concrete structure, and the intensity level of concrete is not less than C30, and the impervious grade of concrete is not less than P6, double-deck arrangement of reinforcement about the big bottom plate, the arrangement of reinforcement rate is not less than 0.15%, and the reinforcing bar adopts HRB 400.
As an optimized technical proposal of the utility model, the surface of the large bottom plate needs to be coated with two modified hot asphalts.
As an optimized technical scheme of the utility model, the slip casting pressure control of half dish is at 0.4 ~ 0.6 MPa.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the thick soft soil foundation is treated by adopting a drilling mud jacking pile foundation and a soft soil foundation pile group semi-supporting disc foundation treatment technology, so that the bearing capacity can be effectively improved, and the settlement amount, the settlement difference and the inclination of a building (structure) can be effectively reduced; the drilling mud jacking pile is more beneficial to compacting soil among piles than a precast pile, and the split grouting/pressure stabilizing grouting technology enables the foundation to have the characteristic of a composite foundation; the construction process is simple compared with that of a supporting disc pile, the hole forming/pile forming is not influenced, secondary compaction can be realized on the foundation soil to enable the foundation soil to be more compact, and a weak foundation area is reinforced more powerfully to enable the technical economy to be more reasonable; the pile group semi-supporting disc can eliminate the phenomenon of high bearing platform piles, and is more stable, more reliable and safer for the horizontal force resistance (wind load effect, earthquake effect and the like) of the towering/isolated particle structure and the coordination and deformation resistance of the whole foundation structure.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of pile arrangement on a plane according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment 1-1 of a reinforcing area by half-braced disc grouting;
fig. 3 is a schematic view of bending a reinforcing bar of a large bottom plate of a pile top according to an embodiment of the present invention;
in the figure: 1. a large bottom plate; 2. drilling and grouting piles; 3. pile group semi-supported disc.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted. It should be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, the utility model provides a soft soil foundation pile group semi-supported disc pile foundation structure, which comprises a large bottom plate 1 (including the large bottom plate and the ring wall thereof); 2, drilling and grouting piles; 3 after drilling and grouting to form piles in the soft soil foundation area, implementing special split grouting to the inter-pile soft soil with the pile diameter thickness of 2-3 times (determined according to the actual soft soil thickness) in the inter-pile area to form a supporting disc which is not integrated with the grouped piles, and aiming at assisting the secondary compaction of the inter-pile soil to have a grouped pile supporting disc effect, namely a grouped pile semi-supporting disc for short.
1 large base plate (including large base plate and its ring wall), and is mainly used as the foundation of steel plate storehouse, bulk material storehouse, petrochemical industry/chemical industry large-scale tank body, etc.
The soft soil foundation drilling mud jacking pile is a preferred pile type for reinforcing a thick and soft soil foundation, the pile formed by splitting and grouting is 'disc root staggered joint', a ground connecting wall can be formed by high-pressure stabilization if necessary, the bearing capacity of the foundation can be improved to the maximum extent, and specific pile forming parameters are adopted for synchronous analysis with technical economy during use.
3 soft soil foundation pile group semi-supported disc pile foundation technology, called pile group semi-supported disc technology for short. The technology aims at compacting the soil among piles secondarily, and the secondarily-compacted soft soil foundation is compacted to assist the pile group supporting disc effect due to compaction under the condition of reasonable grouting amount of the drilling and grouting piles, so that the anti-settling effect is realized to the maximum extent, the pile group effect is realized to the maximum extent, the economic construction loss caused by improper foundation treatment is guaranteed to the maximum extent, and the technology is economic and reasonable.
Referring to fig. 2, the grouting and compaction reinforcing part of the soft soil foundation under the large bottom plate after the pile foundation of the professional drilling and grouting soft soil foundation drilling mud jacking pile is formed is shown. And (4) a cross section schematic diagram of a pile group foundation after the semi-branch disc of the pile group is formed by grouting. The grouting slurry is specially prepared and meets the foundation soil property and pore condition. And (3) the grouting pressure of the grouting pipe and the equipment and the like must meet the secondary compaction condition, and the grouting is carried out under stable pressure to form a semi-supported disc.
Referring to fig. 3, a schematic diagram of a pile bending pile passing through a large bottom plate bottom layer steel bar at the joint of a drilling mud jacking pile and the large bottom plate of a soft soil foundation pile group semi-supported disc pile foundation. The reinforcing steel bars have to be bent and directly paved on the pile top to form the bottom reinforcing steel bars of the large bottom plate.
The large bottom plate is of a reinforced concrete structure, the strength grade of concrete is not lower than C30, and C35 and C40 can be adopted according to calculation. The impermeability grade of the concrete is not lower than P6. In severe cold areas and cold regions, the frost resistance grade of concrete is not lower than F200.
The large bottom plate is of a reinforced concrete structure, the upper layer and the lower layer of the bottom plate are provided with reinforcing bars, the reinforcing bar rate is not less than 0.15%, the reinforcing bars adopt HRB400, and the diameter of the reinforcing bars is preferably 20 and not more than 22. The concrete protective layer of the steel bar is 40 mm.
The large bottom plate is of a reinforced concrete structure, and a foundation bottom plate is coated with two modified hot asphalts. The two modified hot asphalts in cold areas and severe cold areas are coated to 400mm above a freeze-thaw line or 400mm above the ground.
In the drilled grouting pile, the steel reinforcement cage must be through long, and the steel adopted by the steel reinforcement cage is HRB 335; the grouting pipes are graded, pressure-stabilizing grouting and splitting grouting are carried out; the soft soil layer pressure-stabilizing grouting must meet the pressure requirement, the time requirement and the grouting quantity requirement.
The pile group semi-supporting disc is required to be fully poured in a soft soil foundation area with 2-3 times of pile diameter and even thicker under a large bottom plate (a pile foundation bearing platform) after the pile is formed by drilling and grouting piles, so that the phenomenon of high bearing platform piles is eliminated, the foundation is compact, and the corresponding supporting disc function is realized. The half supporting disc can be used as a second path in a 6-8 m deep foundation area below the foundation slab due to the soft soil, the thickness can be determined according to the thickness of the soft soil layer, and the thickness is generally not less than 2-3 times of the pile diameter and even thicker.
The pile group semi-supporting disc is not integrated with the drilling mud jacking pile and can be called as a semi-supporting disc, construction is carried out after pile forming, the purpose is to reinforce the foundation, assist in coordinating and optimizing the coordination performance of the pile and the foundation, improve the bearing capacity of the pile group composite foundation and reduce or even eliminate the problem of foundation settlement of the drilling mud jacking pile of the soft soil foundation. The grouting pressure of the pile group semi-branch disc is required to be controlled within the range of 0.4-0.6 MPa, and the volume grouting amount is controlled according to the porosity of the foundation soil reported by geological detail survey. The pile group semi-supporting disc is formed by high-pressure-stabilizing split grouting of a special material and a construction process, and the grouting material and the process are environment-friendly and civilized.
In the connection between the large bottom plate (pile foundation bearing platform) and the drilled grouting pile group pile, the steel bars of the foundation bottom plate must be bent to cross the pile head of the drilled grouting pile, and cannot pass through the pile head straightly to reduce the structural performance of the pile foundation.
Specifically, soft soil foundation and treatment technology; in the built and scaled production and living environment areas, the soft soil foundation treatment technology is not suitable for adopting technologies with large vibration influence, such as dynamic compaction/pile driving, and the like, and the foundation treatment technology which has no vibration, economic and reasonable technology, and obvious effect on improving the bearing capacity of the foundation and reducing or preventing settlement, such as the drilling and grouting pile technology, and the like, is adopted; for high-warehouse structures with large upper parts (tens of thousands to hundreds of thousands), such as structures of large-size steel plate warehouse ash storehouses, large-size bulk cargo high storage warehouses and the like, the foundation treatment technology of the soft soil foundation adopts a large-bottom plate group pile foundation; the structure of a high bearing platform pile foundation is not suitable for being adopted under the action of earthquake and wind load; the settlement of the pile foundation of the large-bottom-plate pile group under the built superstructure is still continued, and the threat/damage/destruction degree and the like to the superstructure and personnel/equipment/facilities continue to increase towards the unfavorable direction, so that the reinforcement treatment is urgently needed; the soft soil foundation between pile groups needs to be subjected to splitting grouting secondary compaction treatment to form a half-supporting disc, so that the bearing capacity of the composite foundation is improved, the composite foundation is reduced or prevented from settling, and the half-supporting disc is formed by high-pressure-stabilizing splitting grouting of special materials and a construction process. The invention/utility model patent can solve the bearing capacity settlement problem of the new building (structure) of the soft soil foundation and also can effectively solve the settlement problem of the existing building (structure).
The half-supporting disk of the soft foundation pile group is a soft foundation and is a pile group foundation, the half-supporting disk cannot be separated from the soft foundation pile group foundation and exists, and the action effect of the half-supporting disk of the soft foundation pile group is not necessary. The half-supporting discs of the pile group of the soft soil foundation are combined together, and the special properties are as above.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a soft soil foundation pile half-supporting disc pile foundation structure, includes the half-supporting disc of big bottom plate and drilling mud jacking stake, software foundation split slip casting, its characterized in that, the bottom of big bottom plate is provided with drilling mud jacking stake the adjacent stake inter-pile point department of drilling mud jacking stake group stake, the limit stake of group stake or 0.5 ~ 1.0 times stake footpath department in the group stake outside of angle stake set up half-supporting disc, the thickness of half-supporting disc is not less than 2 ~ 3 stake footpaths.
2. A soft soil foundation pile group semi-supported disc pile foundation structure of claim 1, wherein a second semi-supported disc is arranged at 6-8 m of the large bottom plate, and the thickness of the second semi-supported disc is not less than 2-3 times of the pile diameter.
3. A soft soil foundation pilework semi-supported disc pile foundation structure of claim 1, wherein the steel reinforcement at the bottom of the large bottom plate is required to be positioned at the top of the pile head of the bored grouting pile.
4. A soft soil foundation pile group semi-supported pile foundation structure as claimed in claim 1, wherein said large bottom plate is of reinforced concrete structure, the strength grade of concrete is not lower than C30, the anti-permeability grade of concrete is not lower than P6, the reinforcement of the upper and lower layers of said large bottom plate is not less than 0.15%, and the reinforcement is HRB 400.
5. A soft soil foundation pilework of a partly-supported disk pile foundation structure according to claim 1, characterized in that the surface of the large bottom plate is coated with two modified hot asphalts.
6. A soft soil foundation pile half-supporting disc pile foundation structure as claimed in claim 1, wherein the grouting pressure of the half-supporting disc is controlled to be 0.4-0.6 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022213253.0U CN212742608U (en) | 2020-10-07 | 2020-10-07 | Soft soil foundation pile group semi-supported disc pile foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022213253.0U CN212742608U (en) | 2020-10-07 | 2020-10-07 | Soft soil foundation pile group semi-supported disc pile foundation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212742608U true CN212742608U (en) | 2021-03-19 |
Family
ID=74990061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022213253.0U Expired - Fee Related CN212742608U (en) | 2020-10-07 | 2020-10-07 | Soft soil foundation pile group semi-supported disc pile foundation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212742608U (en) |
-
2020
- 2020-10-07 CN CN202022213253.0U patent/CN212742608U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Adams et al. | Geosynthetic reinforced soil integrated bridge system, synthesis report | |
| CN203603105U (en) | Wall plate type ecological retaining wall bank protection structure | |
| CN108360547B (en) | Bridge composite foundation suitable for deep water and strong earthquake conditions | |
| CN109667262B (en) | Karst water falling hole plugging structure and construction method thereof | |
| CN102434717A (en) | Construction method of joist steel pipe-jacking work pit | |
| CN103147614A (en) | Pool with multi-layer structure and building method thereof | |
| CN109944244A (en) | A kind of anti-float anchor rod and its construction method | |
| CN112726692A (en) | Multi-defense line vibration control method for ancient building | |
| CN207878473U (en) | Layer depth foundation pit hangs foot stake supporting construction to Tu Yan in combination | |
| Raju | Ground improvement-applications and quality control | |
| CN212742608U (en) | Soft soil foundation pile group semi-supported disc pile foundation structure | |
| CN100507166C (en) | Method for refitting base of vertical type oil tank made from steel through method of preset | |
| CN113718815A (en) | Soft soil foundation pile group semi-supported disc pile foundation technology | |
| CN211113579U (en) | Heavy-load ground foundation structure for seepage-proofing area of soft foundation | |
| CN110593242A (en) | Heavy-load ground foundation structure of seepage-proofing area of soft foundation and processing method thereof | |
| Yamashita et al. | Recent case histories on monitoring settlement and load sharing of piled rafts in Japan | |
| CN108647424B (en) | Method for determining tensile resistance of vertical geogrid of anti-uplift composite reinforced pile | |
| CN217078698U (en) | Composite foundation structure for reinforcing multiple layers of soft soil | |
| CN204662417U (en) | A kind of Deep Thick Soft Ground district pool roadbed foundation reinforcing structure | |
| CN218508149U (en) | Road subgrade structure near river in steep mountain area | |
| CN113463456B (en) | Method for mountain wind power road to pass through large-scale gully | |
| CN217679213U (en) | Soft soil foundation drainage pipe foundation structure | |
| CN219568892U (en) | Old cohesive soil stratum box culvert foundation pit supporting structure close to house | |
| CN202323983U (en) | Pile-free foundation for tower crane | |
| CN220953536U (en) | Long and short pile composite foundation treatment structure of lower horizontal pipe gallery structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210319 |