CN213867843U - Deep foundation pit supporting structure for deep sludge layer - Google Patents
Deep foundation pit supporting structure for deep sludge layer Download PDFInfo
- Publication number
- CN213867843U CN213867843U CN202022556833.XU CN202022556833U CN213867843U CN 213867843 U CN213867843 U CN 213867843U CN 202022556833 U CN202022556833 U CN 202022556833U CN 213867843 U CN213867843 U CN 213867843U
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- cement
- deep
- jet grouting
- supporting structure
- 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.)
- Active
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a deep foundation pit supporting structure of a deep silt layer, wherein an outer side pile wall is formed by meshing at least three drainage mud high-pressure rotary spraying piles, two adjacent cement high-pressure rotary spraying piles are meshed with each other, the outer side pile wall is arranged around the northwest side to the northeast side of a foundation pit, and the south side and the east side of the foundation pit are in slope arrangement; the core tube bearing platform is arranged in the foundation pit, and bored piles are drilled below the core tube bearing platform to form pile groups; the lattice type cement soil retaining wall is arranged at the bottom of the foundation pit and comprises a plurality of columns of longitudinal cement soil retaining walls arranged at intervals on the transverse direction and a plurality of columns of transverse cement soil retaining walls arranged at intervals on the longitudinal direction, wherein the longitudinal cement soil retaining walls are formed by a plurality of cement high-pressure jet grouting pile occlusion arranged on the longitudinal direction, and the transverse cement soil retaining walls are formed by a plurality of cement high-pressure jet grouting pile occlusion arranged on the transverse direction. The utility model provides a technical scheme's beneficial effect is: compared with the conventional drilling and pouring drill, the cost is greatly reduced, and the construction period is shortened.
Description
Technical Field
The utility model relates to a excavation supporting field especially relates to a deep excavation supporting construction of deep silt layer.
Background
The problem that the deep foundation pit supporting engineering and the slope supporting of a deep sludge layer are relatively complex is proved by the fact that if the deep foundation pit supporting engineering and the slope supporting are improperly processed, even if the excavation depth is not large, integral instability or large deformation is easy to occur to cause deviation of an engineering pile, so that the engineering is failed.
The rainbow energy mansion built by the hong energy industry and trade company Limited in Hubei is positioned at the crossing of a Chinese building Daodao and pier, is positioned on a deep mud layer, is very close to a building Daodao on the west side, a nine-story Changdong mansion on the west side and two seven-story residential buildings on the east side, and is also provided with a cable trench, a gas pipeline, a sewer and the like in the middle, the excavation depth is 2.5m on the south side, 4.3m on the west side, 5.3m on the east side and 6.6m in local depth. The surrounding environment is complex, and sludge soft soil is mainly in the excavation depth, so that the safety level of the foundation pit is positioned at one level, and the common deep foundation pit slope support is characterized in that cast-in-situ bored piles are drilled around the foundation pit, and a jet grouting pile curtain is added to block mud and stop water, so that the manufacturing cost reaches 600 ten thousand yuan, the manufacturing cost is overlarge, and the construction period is long.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the above problem, an embodiment of the present invention provides a deep foundation pit supporting structure for a deep sludge layer.
An embodiment of the utility model provides a deep excavation supporting construction in deep silt layer, include:
the outside pile wall is formed by the interlock of at least three drainage mud high-pressure jet grouting piles, two adjacent cement high-pressure jet grouting piles are mutually interlocked, the top elevation of the outside pile wall is flush with the ground elevation, the outside pile wall is arranged around the northwest side to the northeast side of the foundation pit, and the south side and the east side of the foundation pit are in slope setting;
the core tube bearing platform is arranged in the foundation pit, and bored piles are drilled below the core tube bearing platform to form pile groups; and the number of the first and second groups,
lattice formula soil cement barricade locates the foundation ditch bottom, including multiseriate longitudinal cement soil barricade that the interval set up on horizontal and the multiseriate horizontal soil cement barricade that sets up on vertical, longitudinal cement soil barricade is formed by a plurality of cement high pressure jet grouting stake interlocks of arranging on vertical, horizontal soil cement barricade is formed by a plurality of cement high pressure jet grouting stake interlocks of arranging on horizontal, the summit height of lattice formula soil cement barricade is located the end elevation top of outside pile wall, the end elevation of lattice formula soil cement barricade is located the end elevation below of outside pile wall.
Furthermore, a plurality of cement high-pressure rotary jet grouting piles are arranged on each row of the longitudinal cement retaining wall in the transverse direction and are arranged in an occlusion manner; and/or the presence of a gas in the gas,
and each row of the transverse cement retaining walls is provided with a plurality of cement high-pressure rotary jet grouting piles in the longitudinal direction and is arranged in an occlusion manner.
Furthermore, a concrete layer is laid on the top of the outer side pile wall.
Further, the cement high-pressure rotary jet grouting pile is a dry jet grouting pile.
Furthermore, a plurality of steel templates which are arranged closely are fixed on the inner side wall of the outer side pile wall.
Further, the steel template is connected with the core tube bearing platform through a plurality of oblique supporting pieces.
Further, a plurality of the diagonal support members are connected with the steel molding plates of different heights.
Furthermore, the inclined support piece comprises a plurality of metal pipes which are arranged in parallel, and a connecting plate is connected between every two adjacent metal pipes.
Further, the inclined support member includes three metal tubes, and the inclined support member is triangular in cross section.
Furthermore, one side of the steel formwork back to the outer side pile wall is fixed with a plurality of transverse pipes which are arranged at intervals from top to bottom, one side of each transverse pipe back to the steel formwork is fixed with a plurality of vertical pipes which are arranged at intervals, and the inclined support piece is fixedly connected with the vertical pipes.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the construction method is most economical and effective by adopting the jet grouting piles (deep mixing conjoined piles) to form outer side pile wall support water insulation, and because the excavation depth of the south side slope and the east side slope of the foundation pit is shallow, the soil quality is better, slope excavation can be adopted, and the side slope support and mud blocking and water stopping are needed to be carried out on the northwest side and the northeast side. Because the foundation ditch bottom is the silt layer, when the uninstallation of digging in the foundation ditch, can cause outside pile wall silt to extrude to the foundation ditch in, make the foundation ditch middle part uplift, in order to avoid this kind of condition, adopt the jet grouting stake to form lattice formula cement retaining wall bottom the foundation ditch, improved the intensity of blockking to silt, can prevent that the silt of outside pile wall from extruding to the foundation ditch in, strengthen the intensity of strutting of foundation ditch, compared with conventional brill and establish drilling perfusion brill, the cost that adopts the jet grouting stake is only 115 ten thousand yuan, the cost is greatly reduced and the time limit for a project is shortened.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the deep foundation pit supporting structure for a deep sludge layer provided by the present invention;
FIG. 2 is a schematic partial cross-sectional view of A-A' of FIG. 1;
FIG. 3 is an enlarged schematic view at B in FIG. 2;
fig. 4 is a schematic structural view of the diagonal support member of fig. 1.
In the figure: the core tube retaining platform comprises a core tube retaining platform 1, an outer side pile wall 2, a foundation pit 3, grouped piles 4, a lattice type cement retaining wall 5, a steel template 6, an inclined support member 7, a metal tube 71, a connecting plate 72, a horizontal tube 8 and a vertical tube 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, an embodiment of the present invention provides a deep foundation pit supporting structure for a deep sludge layer, including an outer pile wall 2, a core tube bearing platform 1 and a lattice type cement retaining wall 5.
The outer side pile wall 2 is formed by meshing at least three drainage mud high-pressure jet grouting piles, two adjacent cement high-pressure jet grouting piles are meshed with each other, the top elevation of the outer side pile wall 2 is flush with the ground elevation, the outer side pile wall 2 is arranged around the northwest side to the northeast side of a foundation pit 3, and the south side and the east side of the foundation pit 3 are in slope setting; the core tube bearing platform 1 is arranged in a foundation pit 3, and bored piles are drilled below the core tube bearing platform 1 to form a pile group 4, so that a solid foundation is provided for the core tube; lattice formula soil cement barricade 5 locates foundation ditch 3 bottoms, including multiseriate vertical soil cement barricade that the interval set up on horizontal and multiseriate horizontal soil cement barricade that the interval set up on vertical, vertical soil cement barricade is formed by a plurality of cement high pressure jet grouting pile interlocks of arranging on vertical, horizontal soil cement barricade is formed by a plurality of cement high pressure jet grouting pile interlocks of arranging on horizontal. It should be noted that the directions of the transverse cement-soil retaining wall and the longitudinal cement-soil retaining wall are opposite, and the directions of the transverse cement-soil retaining wall and the longitudinal cement-soil retaining wall in the foundation pit can be specifically set according to the edge of the foundation pit, for example, because the edge of the northwest side of the foundation pit extends along the northeast-southwest direction, the direction of the longitudinal cement-soil retaining wall of the northwest side is the northeast-southwest direction, and the direction of the transverse cement-soil retaining wall is the northwest-southeast direction; the direction of the longitudinal cement-soil retaining wall on the east side of the foundation pit is the same as the extending direction of the edge on the east side of the foundation pit, and the direction of the transverse cement-soil retaining wall is perpendicular to the direction of the longitudinal cement-soil retaining wall. Lattice formula soil cement barricade 5's top elevation is located outside pile wall 2's end elevation top, lattice formula soil cement barricade 5's end elevation is located outside pile wall 2's end elevation below.
The utility model discloses an adopt jet grouting pile (deep stirring disjunctor stake) to form outside pile wall 2 and strut the water proof, be most economical and effective, because foundation ditch 3 south slope, east slope excavation degree of depth are lighter, and the soil property is better, can adopt and put the slope excavation, and northwest side and northeast side need carry out the side slope and strut and keep off mud stagnant water. Because the bottom of foundation ditch 3 is the silt layer, when the uninstallation of digging in foundation ditch 3, can cause the silt outside the outside pile wall 2 to extrude in foundation ditch 3, make 3 middle parts of foundation ditch uplift, in order to avoid this condition, adopt the jet grouting stake to form lattice formula soil cement barricade 5 in the bottom of foundation ditch 3, the strength of blockking to silt has been improved, can prevent that the silt of outside pile wall 2 from extruding to foundation ditch 3 in, strengthen the intensity of strutting of foundation ditch 3, compared with the conventional drilling perfusion brill of establishing, the cost of adopting the jet grouting stake is only 115 ten thousand yuan, the cost is greatly reduced and the time limit for a project has been shortened.
In order to avoid that the top of the jet grouting pile is easily damaged, a concrete layer is laid on the top of the outer side pile wall to enhance the strength of the top of the jet grouting pile, and further, the outer side pile wall can also be set in a lattice type (please refer to the outer side pile wall at the northwest of the foundation pit in fig. 1, only the outer side pile wall at the northwest is shown in the figure, actually, the outer side pile walls from the northwest to the northeast are all set in a lattice type), so that the strength of the outer side pile wall can be enhanced, and the supporting strength of the foundation pit is enhanced.
Every row vertical cement retaining wall is equipped with a plurality of cement high pressure jet grouting piles on horizontal and is the interlock setting, every row horizontal cement retaining wall is equipped with a plurality of cement high pressure jet grouting piles on vertical and is the interlock setting, can strengthen outside pile wall 2's intensity.
Because the regional slope of the south of core tube cushion cap is great, 1 south of core tube cushion cap also lays the cement retaining wall that multirow jet grouting pile formed, and the degree of depth of this cement retaining wall north reaches 7 meters, and the degree of depth of the south of cement retaining wall is 5 meters, and the soil property is relatively poor, lays this cement retaining wall and can avoid the clay under the foundation ditch to appear sliding.
The cement high-pressure rotary jet grouting pile is a dry jet grouting pile, can absorb moisture in dry sludge, well changes the soil structure of a soft soil layer, and achieves the effect of safely and smoothly completing foundation pit 3 soil excavation construction.
Because the jet grouting pile is better in vertical compressive strength, and bending-resistant shear-resistant effect is relatively poor, in order to avoid the jet grouting pile to buckle, the 2 inside walls of outside pile wall are fixed with the steel form 6 that a plurality of next-door neighbour set up, can improve the compressive strength of jet grouting pile side direction. The steel template 6 is connected with the core tube bearing platform 1 through the plurality of oblique supporting pieces 7, the steel template 6 is supported, the compressive strength of the jet grouting pile can be further improved, and the supporting strength of the foundation pit 3 is enhanced.
It is a plurality of slant support piece 7 and co-altitude steel form 6 is connected, lays outside pile wall 2 and lattice formula soil cement barricade 5 after, can adopt the layering excavation and put the mode of slope excavation to the soil property in foundation ditch 3, and the limit excavation limit is at the fixed steel form 6 of 2 inside walls of outside pile wall, and steel form 6's fixing is prior art, does not do the concrete description here. Because the jet grouting pile is roughly cylindrical, a gap exists between the steel template 6 and the outer side pile wall 2, and silt, which is generated when the jet grouting pile is drilled, is filled between the steel template 6 and the outer side pile wall 2, the silt is added between the steel template 6 and the outer side pile wall 2, and the steel template 6 and the outer side pile wall 2 can be tightly fixed through compaction of the steel template 6.
And connecting the core tube bearing platform 1 and the steel template 6 by using the oblique supporting piece 7 until the excavation of the foundation pit 3 is finished. Specifically, the inclined support member 7 includes a plurality of metal tubes 71 arranged in parallel, and a connecting plate 72 is connected between two adjacent metal tubes 71, so that the strength of the inclined support member 7 can be enhanced. The steel form 6 and the diagonal support 7 can be detached for recycling after completion, which can further reduce the cost.
Referring to fig. 3, the diagonal support member 7 includes three metal tubes 71, and the cross section of the diagonal support member 7 is triangular, so that the strength of the diagonal support member 7 can be ensured on the premise of reducing the cost. In this embodiment, the metal tube 71 is a steel tube with a diameter of 50mm, the connecting plate 72 is a steel plate, the material is easy to obtain, and the metal tube and the connecting plate can be connected by welding.
In this embodiment, one side of steel form 6 back to outside pile wall 2 is fixed with a plurality of violently pipes 8 of the downward spaced setting from top to bottom, and again violently manage 8 one side back to the steel form and be fixed with the standpipe 9 that a plurality of intervals set up, diagonal brace spare 7 and standpipe 9 fixed connection through violently managing 8 and standpipe 9's setting, can strengthen each steel form 6's joint strength, through providing fixed basis for diagonal brace spare 7.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a deep excavation supporting construction in deep silt layer which characterized in that includes:
the outside pile wall is formed by the interlock of at least three drainage mud high-pressure jet grouting piles, two adjacent cement high-pressure jet grouting piles are mutually interlocked, the top elevation of the outside pile wall is flush with the ground elevation, the outside pile wall is arranged around the northwest side to the northeast side of the foundation pit, and the south side and the east side of the foundation pit are in slope setting;
the core tube bearing platform is arranged in the foundation pit, and bored piles are drilled below the core tube bearing platform to form pile groups; and the number of the first and second groups,
lattice formula soil cement barricade locates the foundation ditch bottom, including multiseriate longitudinal cement soil barricade that the interval set up on horizontal and the multiseriate horizontal soil cement barricade that sets up on vertical, longitudinal cement soil barricade is formed by a plurality of cement high pressure jet grouting stake interlocks of arranging on vertical, horizontal soil cement barricade is formed by a plurality of cement high pressure jet grouting stake interlocks of arranging on horizontal, the summit height of lattice formula soil cement barricade is located the end elevation top of outside pile wall, the end elevation of lattice formula soil cement barricade is located the end elevation below of outside pile wall.
2. The deep foundation pit supporting structure of a deep sludge layer according to claim 1, wherein each row of the longitudinal cement retaining wall is provided with a plurality of cement high-pressure jet grouting piles in a lateral direction and in an engaged arrangement; and/or the presence of a gas in the gas,
and each row of the transverse cement retaining walls is provided with a plurality of cement high-pressure rotary jet grouting piles in the longitudinal direction and is arranged in an occlusion manner.
3. The deep foundation pit supporting structure for a deep sludge layer as claimed in claim 1, wherein a concrete layer is laid on top of the outer pile walls.
4. The deep foundation pit supporting structure of a deep sludge layer according to claim 2 or 3, wherein the cement high-pressure jet grouting pile is a dry-jet grouting pile.
5. The deep foundation pit supporting structure for a deep sludge layer according to claim 1, wherein a plurality of steel forms disposed closely to each other are fixed to the inner side wall of the outer pile wall.
6. The deep foundation pit supporting structure of a deep sludge layer of claim 5, wherein the steel form is connected to the core tube cap by a plurality of diagonal support members.
7. The deep foundation pit supporting structure of a deep sludge layer of claim 6, wherein a plurality of the inclined supporting members are connected to the steel form plates of different heights.
8. The deep foundation pit supporting structure of a deep sludge layer according to claim 6, wherein the inclined supporting member comprises a plurality of metal pipes arranged in parallel, and a connecting plate is connected between adjacent two of the metal pipes.
9. The deep foundation pit supporting structure for a deep sludge layer according to claim 8, wherein said diagonal support member comprises three of said metal pipes, said diagonal support member having a triangular shape in cross section.
10. The deep foundation pit supporting structure for the deep sludge layer as claimed in claim 6, wherein a plurality of horizontal pipes are fixed to one side of the steel form opposite to the outer pile wall at intervals in the up-down direction, a plurality of vertical pipes are fixed to one side of the horizontal pipes opposite to the steel form at intervals, and the inclined supporting members are fixedly connected to the vertical pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022556833.XU CN213867843U (en) | 2020-11-06 | 2020-11-06 | Deep foundation pit supporting structure for deep sludge layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022556833.XU CN213867843U (en) | 2020-11-06 | 2020-11-06 | Deep foundation pit supporting structure for deep sludge layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213867843U true CN213867843U (en) | 2021-08-03 |
Family
ID=77053703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022556833.XU Active CN213867843U (en) | 2020-11-06 | 2020-11-06 | Deep foundation pit supporting structure for deep sludge layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213867843U (en) |
-
2020
- 2020-11-06 CN CN202022556833.XU patent/CN213867843U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110331727B (en) | Support structure combining cast-in-place pile and underground diaphragm wall and construction method | |
| WO2022100346A1 (en) | Reinforcement structure for entry and exit of large-diameter jacking pipe group in water-rich sand stratum, and construction method | |
| CN103321246A (en) | Underground diaphragm wall based foundation pit construction method | |
| CN110700280A (en) | Narrow zone foundation pit supporting construction flow guide device and construction method | |
| CN111236952A (en) | Full-recovery assembly type rectangular pipe-jacking working well steel structure supporting device and construction method of working well | |
| CN110117959B (en) | Construction method for foundation pit support near river | |
| CN213867843U (en) | Deep foundation pit supporting structure for deep sludge layer | |
| CN111042161A (en) | Slope collapse high slope flexible processing structure and construction method thereof | |
| CN113957880B (en) | Construction method of steel-concrete underground continuous wall | |
| CN215977295U (en) | Foundation pit supporting structure | |
| CN213448506U (en) | Plugging structure arranged between foundation pit fender posts | |
| CN210887256U (en) | Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam | |
| CN113914909A (en) | Tunnel water inrush point emergency rescue plugging structure and construction method thereof | |
| CN210141142U (en) | Underground structure is built in same direction as digging in hole stake secret | |
| CN220099935U (en) | Steel pipe pile supporting structure for limited space supporting in sandy pebble area | |
| CN114482079B (en) | Construction method for deep foundation pit of pipe jacking well | |
| CN218175855U (en) | Storehouse section of thick bamboo type secant pile underground lattice wall underground structure for protecting foundation pit | |
| CN218562366U (en) | Underground continuous wall and TRD link up stagnant water architecture | |
| CN115492161B (en) | Construction method for building basement storey-adding three-side surrounding pipe curtain of existing building | |
| CN217601487U (en) | Dredging well plugging construction node | |
| CN219158994U (en) | Deep soft soil area ultra-deep large-diameter round pipe jacking working well foundation pit supporting structure | |
| CN219080388U (en) | Pier circular deep foundation | |
| CN218667648U (en) | Pass through shaft structure of existing pipeline transformation | |
| CN221193424U (en) | Retaining wall prefab | |
| CN217556947U (en) | Reinforcing structure for joint area of underground continuous wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |