CN212835477U - Collapsible loess foundation structure - Google Patents
Collapsible loess foundation structure Download PDFInfo
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- CN212835477U CN212835477U CN202021527077.1U CN202021527077U CN212835477U CN 212835477 U CN212835477 U CN 212835477U CN 202021527077 U CN202021527077 U CN 202021527077U CN 212835477 U CN212835477 U CN 212835477U
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Abstract
The utility model relates to a collapsible loess foundation structure, it includes a plurality of pile foundations, and the bearing plate is installed to the upper end of pile foundation, and the lower extreme of pile foundation pierces through soil body layer and gets into the strength layer, be provided with a plurality of branches on the lateral wall of pile foundation, branch sliding connection just props up the slip direction on the pile foundation and puts towards the central point of pile foundation, the inside of pile foundation is hollow structure, seted up the through-hole on the branch, through-hole and the inside intercommunication of pile foundation, the inside of pile foundation has grouted the grout through-hole to soil body layer and strength in situ. The utility model discloses have the effect that the soil body around the reduction pile foundation subsides bearing capacity influence the cushion cap board.
Description
Technical Field
The utility model belongs to the technical field of the technique of collapsible loess construction and specifically relates to a collapsible loess foundation structure is related to.
Background
Collapsible loess is formed under drought weather conditions, loose particles are adhered together by a small amount of seasonal rainwater at the early formation stage, and water is continuously evaporated by long-term drought to form a porous structure taking coarse particles as a main framework. Its characteristic is that it has higher intensity and less compressibility under natural dry state, once a large amount of precipitation or canal water infiltrate, the multiple soluble salt in the loess is dissolved after soaking, the cement in the soil weakens, the soil body structure destroys rapidly under the combined action of dead weight and certain load, the bearing capacity also reduces sharply, produces a large amount of collapsible deformation, causes the structure above it to suffer destruction. In arid and semiarid climatic environments in northwest regions, loess accumulation has an under-pressure dense macroporous structure.
The patent document with the publication number of CN209989656U discloses a deep collapsible loess subgrade foundation structure, which comprises a plurality of pile foundations longitudinally distributed at intervals along a foundation, a bracket arranged at the upper end of each pile foundation and a bearing plate longitudinally extending along the foundation, wherein the pile foundations vertically penetrate through a soil body and are consolidated with a bearing layer, the bearing plate is supported on the bracket and is connected with the bracket, and a backfill layer is arranged between the pile foundations and the soil body as well as between the pile foundations and the bearing layer; and the upper end of the backfill layer and the lower end of the bracket are provided with reset components for lifting the pile foundation and the bearing plate, and the reset components are circumferentially distributed along the pile foundation. The pile foundation is driven into after the backfill layer is laid in the pile hole, so that the hard shell layer of the soil around the pile can be effectively prevented from being directly driven, the generation of negative friction force is effectively reduced, and the settlement of the pile foundation is reduced.
The pile foundation and the bearing plate can be restored under the action of the resetting component, but the depth of the pile foundation in the soil body and the bearing layer is insufficient, so that the pressure which can be borne by the bearing plate can be influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a collapsible loess foundation structure, it has the effect that reduces the soil body settlement around the pile foundation and influences bearing capacity of bearing plate.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a collapsible loess foundation structure, includes a plurality of pile foundations, and the bearing board is installed to the upper end of pile foundation, and the lower extreme of pile foundation pierces through the soil body layer and gets into the holding power layer, be provided with a plurality of forks on the lateral wall of pile foundation, fork sliding connection just props up the slip direction of fork on the pile foundation and puts towards the central point of pile foundation, the inside of pile foundation is hollow structure, seted up the through-hole on the fork, through-hole and the inside intercommunication of pile foundation, the inside of pile foundation has grouted the grout through the through-hole to the soil body layer and holding power in situ.
Through adopting above-mentioned technical scheme, during the use, with the lower extreme of pile foundation vertical squeeze into soil layer and hold the power in situ, then follow the inside roll-off of pile foundation with a plurality of forks in the pile foundation, then the fork stretches out the back and pours into grout in the inside of pile foundation, because the through-hole has been seted up on the fork, thereby grout can enter into soil layer and hold the power in situ around, the soil layer and hold the power layer reinforcement around the fork will be propped up to grout, and then reduce the influence of soil body subsides around the pile foundation to bearing plate bearing capacity.
The utility model discloses further set up to: the pile foundation is characterized in that a pushing block is arranged inside the pile foundation, a first inclined surface is arranged on the pushing block, the first inclined surface inclines from the lower end of the pushing block to the upper end of the pushing block to the position of a supporting fork, a second inclined surface is arranged at one end, located in the pile foundation, of the supporting fork, and the first inclined surface and the second inclined surface are arranged in parallel.
Through adopting above-mentioned technical scheme, set up the ejector pad in the inside of pile foundation, be provided with inclined plane one on the ejector pad, inclined plane one and prop up and have seted up two parallels on the fork on the inclined plane, when placing the pile foundation with the ejector pad in, inclined plane one on the ejector pad extrudees inclined plane two, makes a fork stretch out from the pile foundation.
The utility model discloses further set up to: the one end slope that the fork is located the pile foundation sets up downwards, the slip direction of fork on the pile foundation is on a parallel with the extending direction of fork.
Through adopting above-mentioned technical scheme, the one end downward sloping of fork outside the pile foundation when the fork stretches out, can make the fork move down, and the effort of ejector pad effect on the fork is bigger, makes the fork stretch out more easily, and the in-process of squeezing into at the pile foundation simultaneously can prevent that the fork from stretching out in the pile foundation.
The utility model discloses further set up to: the pile foundation comprises an inner layer and an outer layer, the outer layer is of a tubular structure made of metal materials, the inner layer is of a tubular structure prefabricated by concrete materials, and the outer diameter of the inner layer is equal to the inner diameter of the outer layer.
Through adopting above-mentioned technical scheme, the pile foundation includes inlayer and skin, and the skin is made for metal material, and the inlayer is the prefabricated formation of concrete material, makes the intensity of pile foundation higher, makes things convenient for the pile foundation to insert in soil body layer and the holding power layer.
The utility model discloses further set up to: the pile foundation is characterized in that a plurality of steel bars are arranged inside the pile foundation, a supporting seat is arranged between the bearing plate and the pile foundation, and the supporting seat is placed at the upper end of the pile foundation.
Through adopting above-mentioned technical scheme, the inside of pile foundation sets up the reinforcing bar, and after pouring into grout, the reinforcing bar can be connected with grout, increases the intensity after grout solidifies, fixes the supporting seat on the reinforcing bar simultaneously, can make supporting seat and pedestal connection more firm.
The utility model discloses further set up to: the upper end of reinforcing bar is provided with the screw thread, and the supporting seat includes lower plate and upper plate, the upper plate is located the top of lower plate, is provided with the support between upper plate and the lower plate, the upper end of reinforcing bar runs through lower plate and threaded connection has the nut.
Through adopting above-mentioned technical scheme, the upper end of reinforcing bar processes out the screw thread, and when placing the pile foundation with the lower plate on, the reinforcing bar is worn out the lower plate and is fixed through the nut, makes the supporting seat connection more convenient.
The utility model discloses further set up to: a plurality of the fork has the multilayer along the length direction evenly distributed of pile foundation, and every layer of fork evenly distributed has four in the circumference of pile foundation.
Through adopting above-mentioned technical scheme, set the fork to the multilayer to every layer all sets up four, makes the fork support a plurality of positions of pile foundation, improves the support stability of pile foundation.
The utility model discloses further set up to: the distance between two adjacent pile foundations is 3-5 m.
By adopting the technical scheme, the distance between two adjacent pile foundations is 3-5m, and when cement paste is poured into the pile foundations, the cement paste is mutually diffused into the range of the two pile foundations after the two adjacent pile foundations are poured into the cement paste, so that the bearing capacity of the pile foundations is further improved.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the lower end of the pile foundation is vertically driven into the soil layer and the holding force layer, then the support forks in the pile foundation slide out from the interior of the pile foundation, cement paste is poured into the interior of the pile foundation after the support forks extend out, and due to the fact that the through holes are formed in the support forks, the cement paste can enter the surrounding soil layer and the holding force layer, the soil layer and the holding force layer around the support forks are reinforced by the cement paste, and further the influence of soil body sedimentation around the pile foundation on the bearing capacity of the bearing plate is reduced;
2. the pushing block is arranged in the pile foundation, the first inclined surface is arranged on the pushing block and is parallel to the second inclined surface arranged on the fork, when the pushing block is placed in the pile foundation, the second inclined surface is extruded by the first inclined surface on the pushing block, so that the fork extends out of the pile foundation, and the fork can be prevented from extending out of the pile foundation in the process of driving the pile foundation;
3. through the one end downward sloping of a fork outside the pile foundation, when a fork stretches out, can make a fork remove downwards, the effort of ejector pad effect on a fork is bigger, makes a fork stretch out more easily.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of a pile foundation;
FIG. 3 is an internal structural schematic view of a pile foundation;
fig. 4 is a positional relationship diagram of the push block and the yoke.
In the figure, 1, pile foundation; 11. an inner layer; 12. an outer layer; 2. a supporting seat; 21. a lower base plate; 22. an upper base plate; 23. a support; 3. a bearing plate; 4. a support layer; 5. a soil layer; 6. a chute; 7. a branch fork; 71. a second inclined surface; 72. a through hole; 8. a push block; 81. a first inclined surface; 9. reinforcing steel bars; 10. and a nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a collapsible loess foundation structure, including a plurality of pile foundations 1, a plurality of pile foundations 1 are horizontal longitudinal array and distribute, and the interval between two adjacent pile foundations 1 is 3-5 m. The upper end of pile foundation 1 is provided with supporting seat 2, and supporting seat 2 is used for connecting pile cap board 3, and 3 level settings of pile cap board stretch into and run through to soil body layer 5 at the lower extreme of pile foundation 1, and the lower tip of pile foundation 1 inserts in the holding power layer 4 and consolidates with holding power layer 4, and pile foundation 1 is hollow structure, and the lower extreme of pile foundation 1 is for sealing, drives into the lower extreme of pile foundation 1 from subaerial downwards.
Referring to fig. 2 and 3, in order to further increase the connection strength of the pile foundation 1 between the soil body layer 5 and the supporting layer 4, a plurality of sliding grooves 6 have been opened on the side wall of the pile foundation 1, a branch 7 is provided in each sliding groove 6, the branch 7 is slidably fitted in the sliding groove 6, in the process that the pile foundation 1 is driven into the soil body layer 5 and the supporting layer 4, the branch 7 retracts into the pile foundation 1, and after the pile foundation 1 reaches a predetermined position, the branch 7 is extended out to the outside of the pile foundation 1 along the sliding groove 6.
Referring to fig. 3 and 4, a plurality of support forks 7 are uniformly distributed in multiple layers along the length direction of the pile foundation 1, four support forks 7 are arranged on each layer, four support forks 7 are circumferentially and uniformly distributed on the pile foundation 1, a push block 8 is arranged inside the pile foundation 1, a first inclined surface 81 is formed on the push block 8, four first inclined surfaces 81 are respectively corresponding to the four support forks 7 on one layer, the lower end of the push block 8 is smaller than the upper end of the push block 8 due to the first inclined surfaces 81, the first inclined surface 81 inclines from the lower end of the push block 8 to the upper end of the push block 8 to the position of the support forks 7, a second inclined surface 71 parallel to the first inclined surface 81 is formed on the support forks 7, when the push block 8 is placed inside the pile foundation 1, the first inclined surface 81 is attached to the second inclined surfaces 71, and when the push block 8 is pressed downward, the first inclined surfaces 81 push the support forks 7 to extend out of the pile foundation 1. The chute 6 is arranged to be inclined, and the length direction of the branch fork 7 installed in the chute 6 is along the length direction of the chute 6, and the end part of the branch fork 7 is inclined downwards, so that the branch fork 7 moves downwards when extending out of the pile foundation 1 under the action of the push block 8.
Referring to fig. 3, the pile foundation 1 includes an inner layer 11 and an outer layer 12, the inner layer 11 is a tubular structure prefabricated by concrete materials, the outer layer 12 is a tubular structure made of metal materials, the outer layer 12 is arranged on the inner layer 11, the inner diameter of the outer layer 12 is equal to the inner odd outer diameter, so that the pile foundation 1 is improved in strength and convenient to insert when being inserted into the soil body layer 5 and the bearing layer 4. Seted up the through-hole 72 on fork 7, the through-hole 72 communicates in the inside of pile foundation 1, reinforcing bar 9 has been inserted in the inside of pile foundation 1, the lower extreme of reinforcing bar 9 is to the bottom of pile foundation 1, the upper end of reinforcing bar 9 stretches out in pile foundation 1, then to the central point of inlayer 11 pouring cement mortar, when pouring into cement mortar in pile foundation 1, can add the gravel in the pile foundation 1 earlier, reduce the use amount of cement mortar, after cement mortar enters into pile foundation 1, flow out from the position of through-hole 72, cement mortar pours into soil body layer 5 and holding power layer 4 in, distribute around fork 7, make the impetus ability of the tip of fork 7 strengthen, thereby can reduce the settlement of pile foundation 1.
Referring to fig. 2 and 3, the support base 2 includes a lower base plate 21 and a lower base plate 21, an upper base plate 22 and the lower base plate 21 are arranged in parallel, the upper base plate 22 is located right above the lower base plate 21, a support 23 is arranged between the upper base plate 22 and the lower base plate 21, and the upper base plate 22 and the lower base plate 21 are integrally formed through the support 23. At the upper end of placing pile foundation 1 with lower plate 21, the upper end of reinforcing bar 9 is seted up threadedly, and the upper end of reinforcing bar 9 runs through lower plate 21 threaded connection has nut 10, fixes supporting seat 2 in the upper end of pile foundation 1 through nut 10, then places the upper surface of upper plate 22 with the pile cap board 3 and fixes.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a collapsible loess foundation structure, includes a plurality of pile foundations (1), and bearing board (3) are installed to the upper end of pile foundation (1), and the lower extreme of pile foundation (1) pierces through soil layer (5) and gets into bearing layer (4), its characterized in that: be provided with a plurality of forks (7) on the lateral wall of pile foundation (1), fork (7) sliding connection is on pile foundation (1) and fork (7) slide direction on pile foundation (1) puts towards the central point of pile foundation (1), the inside of pile foundation (1) is hollow structure, through-hole (72) have been seted up on fork (7), and through-hole (72) and pile foundation (1) inside intercommunication, the grout has been poured into through-hole (72) in the inside of pile foundation (1) to soil body layer (5) and holding power layer (4).
2. The collapsible loess foundation structure according to claim 1, wherein: the utility model discloses a pile foundation, including pile foundation (1), push block (8) are provided with inclined plane one (81), inclined plane one (81) are from the lower extreme of push block (8) to the upper end of push block (8) to the position slope of fork (7), the one end that fork (7) are located pile foundation (1) is provided with inclined plane two (71), inclined plane one (81) and inclined plane two (71) parallel arrangement.
3. The collapsible loess foundation structure according to claim 1 or 2, wherein: the one end slope that fork (7) are located pile foundation (1) is set up downwards, slip direction of fork (7) on pile foundation (1) is on a parallel with the extending direction of fork (7).
4. The collapsible loess foundation structure according to claim 3, wherein: pile foundation (1) includes inlayer (11) and skin (12), and skin (12) are the tubular structure that metal material made, and inlayer (11) are the tubular structure that concrete material prefabricated becomes, the external diameter of inlayer (11) equals the internal diameter of skin (12).
5. The collapsible loess foundation structure according to claim 4, wherein: the novel pile is characterized in that a plurality of steel bars (9) are arranged inside the pile foundation (1), a supporting seat (2) is arranged between the pile foundation plate (3) and the pile foundation (1), and the supporting seat (2) is placed at the upper end of the pile foundation (1).
6. The collapsible loess foundation structure according to claim 5, wherein: the upper end of reinforcing bar (9) is provided with the screw thread, and supporting seat (2) include lower plate (21) and upper plate (22), upper plate (22) are located the top of lower plate (21), are provided with support (23) between upper plate (22) and lower plate (21), the upper end of reinforcing bar (9) runs through lower plate (21) and threaded connection has nut (10).
7. The collapsible loess foundation structure according to claim 1, wherein: a plurality of the branch forks (7) are uniformly distributed with a plurality of layers along the length direction of the pile foundation (1), and four branch forks (7) are uniformly distributed on each layer in the circumferential direction of the pile foundation (1).
8. The collapsible loess foundation structure according to claim 1, wherein: the distance between two adjacent pile foundations (1) is 3-5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021527077.1U CN212835477U (en) | 2020-07-28 | 2020-07-28 | Collapsible loess foundation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021527077.1U CN212835477U (en) | 2020-07-28 | 2020-07-28 | Collapsible loess foundation structure |
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| CN212835477U true CN212835477U (en) | 2021-03-30 |
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| CN202021527077.1U Active CN212835477U (en) | 2020-07-28 | 2020-07-28 | Collapsible loess foundation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931164A (en) * | 2021-11-01 | 2022-01-14 | 西宁碧胜房地产开发有限公司 | Club-footed pile construction method for pre-soaking and compacting collapsible loess |
-
2020
- 2020-07-28 CN CN202021527077.1U patent/CN212835477U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931164A (en) * | 2021-11-01 | 2022-01-14 | 西宁碧胜房地产开发有限公司 | Club-footed pile construction method for pre-soaking and compacting collapsible loess |
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