CN210031840U - Foundation pit support structure - Google Patents
Foundation pit support structure Download PDFInfo
- Publication number
- CN210031840U CN210031840U CN201920429512.8U CN201920429512U CN210031840U CN 210031840 U CN210031840 U CN 210031840U CN 201920429512 U CN201920429512 U CN 201920429512U CN 210031840 U CN210031840 U CN 210031840U
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- Prior art keywords
- foundation ditch
- foundation pit
- trd
- anchor cable
- campshed
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- 239000002689 soil Substances 0.000 claims abstract description 60
- 239000004568 cement Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a foundation ditch enclosure technical field discloses a foundation ditch enclosure structure, including the campshed of locating foundation ditch one side, the campshed top is connected through the guan liang, one side that is located the campshed and is close to the foundation ditch is equipped with cement mixing pile, cement mixing pile forms the stagnant water curtain, one side that is located the campshed and keeps away from the foundation ditch is equipped with thickness cement mixing wall such as TRD, the soil layer that foundation ditch one side was kept away from to thickness cement mixing wall such as guanliang and TRD passes through anchor rope one taut and is connected, one side that the campshed is close to the foundation ditch is located guanliang below and is equipped with longitudinal structure spare, longitudinal structure spare supports in one side that the campshed is close to the foundation ditch, the soil layer that foundation ditch one side was kept away from. The utility model is suitable for the construction environment with complex geological conditions such as high water level, abundant underground water, silty soil and the like, and has good water-stopping effect, safety and reliability; the method can also limit the row piles adopting the cast-in-place piles to a certain extent, and avoid the pollution of the mud retaining wall of the row piles to the environment.
Description
Technical Field
The utility model relates to a foundation ditch enclosure technical field especially relates to a foundation ditch enclosure structure.
Background
With the rapid development of economy, particularly in coastal areas of China, the process of urbanization construction is increasingly accelerated. The coastal areas of China are relatively poor in land resources, the available land resources are less and less, the development of underground spaces is favored more and more in order to increase the living space of cities, and the coastal areas are mostly soft soil, so that a large number of problems of soft soil foundation pit supporting design are generated, and the problems become hot spots and difficulties of the current basic engineering.
Chinese patent No. CN204780941U discloses a foundation pit enclosure structure, which comprises a plurality of row piles arranged in sequence and arranged on one side of a foundation pit, wherein the row piles are inserted into a soil layer, and the top ends of the row piles are connected through a top connecting structure; the plurality of longitudinal structural members are arranged on one side, close to the foundation pit, of the row piles, each longitudinal structural member is connected with the plurality of row piles, a plurality of anchor cable fixing positions are arranged on each longitudinal structural member, and each anchor cable fixing position is located between every two adjacent row piles; a plurality of anchor cables of the rotary jet piles are arranged on one side of the row piles, which is far away from the foundation pit, and are inserted into the soil layer in an inclined mode; every spouts a anchor rope soon includes spouts a body soon, spouts this internal anchor rope body that is equipped with of stake soon, and the one end of anchor rope body is passed through fixed connection piece and is connected with anchor rope fixed position.
The row pile generally adopts the bored concrete pile as foundation ditch support, and envelope is comparatively firm, but the stagnant water effect is relatively poor. Under the construction environments with complex geological conditions such as high water level, abundant underground water, silt and the like, the water stopping function is not provided, and the construction requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's shortcoming, a foundation ditch envelope is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
the utility model provides a foundation pit retaining structure, including locating a plurality of camps of foundation pit one side along sharp interval arrangement in proper order, the bottom of camps inserts in the soil layer, the top of camps is connected through hat roof beam, it is equipped with cement mixing pile to be located one side that the camps are close to the foundation pit, cement mixing pile continuous arrangement forms stagnant water curtain, it is equipped with thickness cement mixing wall such as TRD to be located one side that the foundation pit is kept away from to the camps, the soil layer that the foundation pit one side was kept away from to thickness cement mixing wall such as hat roof beam and TRD is connected through the tensioning of anchor rope one, the one side that the camps is close to the foundation pit is located hat roof beam below and is equipped with vertical structure, vertical structure supports in one side that the camps is close to the foundation pit, vertical structure is connected.
Preferably, the first anchor cable is a recoverable rotary-spraying hole-expanding prestressed anchor cable, an anchoring section of the first anchor cable is fixed in a soil layer on one side, away from the foundation pit, of the TRD equal-thickness cement soil mixing wall, and a free section of the first anchor cable sequentially penetrates through the TRD equal-thickness cement soil mixing wall and the crown beam and then is fixed on the crown beam through a fixed connecting block; the upper side of one side of the crown beam close to the foundation pit is provided with an inclined plane for obliquely placing the fixed connecting block.
By adopting the scheme, the stress form of the row pile is improved, and the integral overturning of the row pile caused by overlarge displacement of the top end of the row pile under the horizontal force action of a soil body can be prevented; and the stability that anchor rope one is connected with the crown beam is improved, can be with row's pile top fixed more firm.
Preferably, the anchor cable II is a recoverable rotary-spraying hole-expanding prestressed anchor cable, an anchoring section of the anchor cable II is fixed in a soil layer on one side, away from the foundation pit, of the TRD equal-thickness cement-soil mixing wall, and a free section of the anchor cable II sequentially penetrates through the TRD equal-thickness cement-soil mixing wall, soil layers between adjacent row piles and the longitudinal structural member and then is fixedly connected with the longitudinal structural member.
By adopting the scheme, the stress form of the row pile is further improved, and the row pile is prevented from being wholly overturned due to overlarge displacement of the top end of the row pile under the action of the horizontal force of a soil body.
Preferably, the anchor cable I and the anchor cable II are arranged at intervals in the horizontal direction.
By adopting the scheme, the stress form of the row piles is further improved, so that the acting force of the anchor cable I and the anchor cable II on the row piles is more uniform, and the stability of the row piles is improved.
Preferably, if the pre-stressed pipe piles are inserted into the TRD equal-thickness soil cement mixing wall at intervals, the pre-stressed pipe piles are arranged corresponding to the row piles.
By adopting the scheme, the rigidity of the TRD equal-thickness cement-soil mixing wall is improved.
Preferably, a plurality of H-shaped steels are inserted into the TRD equal-thickness cemented soil mixing wall at intervals, and the H-shaped steels are arranged corresponding to the row piles.
By adopting the scheme, the bending resistance and the shearing resistance of the TRD equal-thickness cement-soil mixing wall are improved, the H-shaped steel can be dismantled and recycled under the condition that the design meets the requirements, and the cost is reduced.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the side of the row piles close to the foundation pit and the side of the row piles far away from the foundation pit are respectively provided with a cement soil mixing pile and a TRD (blast furnace direct reduction) equal-thickness cement soil mixing wall, and the row piles are reinforced through a first anchor cable and a second anchor cable, so that the water-stopping device is suitable for construction environments with complex geological conditions such as high water level, abundant underground water and silt, and is good in water-stopping effect, safe and reliable; the method can also limit the row piles adopting the cast-in-place piles to a certain extent, and avoids the pollution of the slurry retaining wall of the row piles to the environment to the maximum extent.
Drawings
Fig. 1 is a schematic lateral structure diagram of a foundation pit enclosure in embodiment 1;
fig. 2 is a schematic longitudinal structure view of a foundation pit enclosure in embodiment 1;
fig. 3 is a schematic lateral structure diagram of a foundation pit enclosure in embodiment 2;
fig. 4 is a schematic longitudinal structure view of a foundation pit enclosure in embodiment 2;
fig. 5 is a schematic longitudinal structure diagram of a foundation pit enclosure in embodiment 3.
The names of the parts indicated by the numerical references in the above figures are as follows: 1. pile arrangement; 2. a crown beam; 21. a bevel; 3. mixing the cement soil with the pile; 4. TRD equal thickness cement mixing wall; 5. an anchor cable I; 6. fixing a connecting block; 7. a longitudinal structural member; 8. anchor cable II; 9. pre-stressing pipe piles; 10. h-shaped steel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1 and 2, the foundation pit support structure comprises a plurality of row piles 1 which are sequentially, uniformly and linearly arranged at intervals and arranged on one side of a foundation pit A1, wherein the row piles 1 adopt cast-in-situ bored piles with the diameter of 1000mm, the bottom ends of the row piles 1 are inserted into a soil layer, and the tops of the row piles 1 are connected through crown beams 2. And a cement-soil mixing pile 3 is arranged on one side of the row piles 1 close to the foundation pit A1, the cement-soil mixing piles 3 adopt triaxial cement-soil mixing piles with the diameter of 850mm, the triaxial cement-soil mixing piles are continuously arranged to form a waterproof curtain, and when a pit is dug in the foundation pit A1, the part of the cement-soil mixing pile 3 above the foundation pit A1 can be dug along with the chisel. The TRD equal-thickness cement-soil mixing wall 4 is arranged on one side, far away from the foundation pit A1, of the row piles 1, the TRD equal-thickness cement-soil mixing wall 4 is continuous in wall forming, smooth in surface, consistent in thickness, good in wall uniformity, good in anti-seepage performance, small in caused environmental pollution and safe in construction, and the thickness of the TRD equal-thickness cement-soil mixing wall 4 is smaller than the diameter of the cement-soil mixing pile 3 and is 700 mm. The bottom end of the cement mixing pile 3 is flush with the bottom end of the TRD equal-thickness cement mixing wall 4, and the bottom end of the row pile 1 is deeper than the bottom end of the cement mixing pile 3 and the bottom end of the TRD equal-thickness cement mixing wall 4.
The soil layer of the side, far away from the foundation pit A1, of the equal-thickness cement soil mixing wall 4 of the TRD is connected in a tensioning mode through an anchor rope I5, the anchor rope I5 adopts a recoverable jet grouting chambering prestress anchor rope, the inclination angle of the anchor rope I5 is 20 degrees, the anchoring section of the anchor rope I5 is fixed in the soil layer of the side, far away from the foundation pit A1, of the equal-thickness cement soil mixing wall 4 of the TRD, the free section of the anchor rope I5 sequentially penetrates through the equal-thickness cement soil mixing wall 4 of the TRD and the crown beam 2 and then is fixed on the crown beam 2 through a fixed connecting block 6, and the upper side, close to the side of the foundation pit A1, of the.
One side of each row pile 1, which is close to the foundation pit A1, is located below the crown beam 2, a longitudinal structural member 7 is arranged at intervals on the longitudinal structural member 7, the longitudinal structural member 7 is vertically arranged with the row piles 1 by adopting profile steel, the longitudinal structural member 7 is connected with a soil layer, which is far away from the foundation pit A1, of the TRD equal-thickness cement soil mixing wall 4 in a tensioning mode through a second anchor cable 8, the second anchor cable 8 adopts a recoverable jet grouting reaming prestress anchor cable, the inclination angle of the second anchor cable 8 is 20 degrees, an anchoring section of the second anchor cable 8 is fixed in the soil layer, which is far away from the foundation pit A1, of the TRD equal-thickness cement soil mixing wall 4, a soil layer between adjacent row piles 1 and the longitudinal structural member 7, and then the free section of the second anchor cable 8 sequentially penetrates through the TRD. The anchor cables I5 and the anchor cables II 8 are arranged at intervals in the horizontal direction.
Example 2
Referring to fig. 3 and 4, the difference between the embodiment and the first embodiment is that a plurality of prestressed pipe piles 9 are uniformly inserted into the equal-thickness cement-soil mixing wall 4 of the TRD at intervals, the prestressed pipe piles 9 are specifically prestressed concrete pipe Piles (PC), the rigidity of the equal-thickness cement-soil mixing wall 4 of the TRD can be effectively improved, and the prestressed pipe piles 9 correspond to the pile arrangement 1 in sequence.
Example 3
Referring to fig. 5, the difference between the embodiment and the second embodiment is that a plurality of H-shaped steels 10 are inserted into a TRD equal-thickness cemented soil stirring wall 4 at uniform intervals to replace prestressed pipe piles 9, and the H-shaped steels 10 sequentially correspond to the row piles 1. After the basement structure construction of foundation ditch A1 is accomplished, carry out the closely knit backfill of layering, after retrieving the prestressing steel strand in anchor rope one 5 and the anchor rope two 8, alright carry out the foundation ditch excavation in order to carry out the foundation ditch to the A2 region, after the construction of the regional foundation ditch of A2 is accomplished, under the condition that campshed 1 and cement mixing pile 3 satisfy the designing requirement, can also pull out the H shaped steel 10 in the equal thickness cement mixing wall 4 such as TRD and retrieve the recycle, have more economic nature.
Claims (6)
1. The utility model provides a foundation pit retaining structure, includes row's stake (1) of locating a plurality of roots in proper order along sharp interval arrangement on one side of the foundation pit, and the bottom of row's stake (1) inserts in the soil layer, and the top of row's stake (1) is connected its characterized in that through guan liang (2): be located one side that campshed (1) is close to the foundation ditch and be equipped with cement mixing pile (3), cement mixing pile (3) are arranged in succession and are formed the stagnant water curtain, one side that is located campshed (1) and keeps away from the foundation ditch is equipped with thickness cement mixing wall (4) such as TRD, the soil layer that foundation ditch one side was kept away from in thickness cement mixing wall (4) such as hat beam (2) and TRD passes through anchor rope one (5) taut connection, one side that campshed (1) is close to the foundation ditch is located hat beam (2) below and is equipped with longitudinal structure spare (7), longitudinal structure spare (7) are supported in one side that campshed (1) is close to the foundation ditch, longitudinal structure spare (7) and the soil layer that foundation ditch one side was kept away from in thickness cement mixing wall (4) such as TRD pass.
2. A foundation pit enclosure according to claim 1 wherein: the anchor cable I (5) adopts a recoverable rotary-spraying hole-expanding prestressed anchor cable, an anchoring section of the anchor cable I (5) is fixed in a soil layer on one side, away from the foundation pit, of the TRD equal-thickness cement soil mixing wall (4), and a free section of the anchor cable I (5) sequentially penetrates through the TRD equal-thickness cement soil mixing wall (4) and the crown beam (2) and then is fixed on the crown beam (2) through a fixed connecting block (6); an inclined plane (21) used for obliquely placing the fixed connecting block (6) is arranged on the upper side of one surface, close to the foundation pit, of the top beam (2).
3. A foundation pit enclosure according to claim 1 wherein: and the anchor cable II (8) adopts a recoverable jet grouting hole expansion prestressed anchor cable, the anchoring section of the anchor cable II (8) is fixed in the soil layer on one side, away from the foundation pit, of the TRD equal-thickness cement soil mixing wall (4), and the free section of the anchor cable II (8) sequentially penetrates through the TRD equal-thickness cement soil mixing wall (4), the soil layers between adjacent row piles (1) and the longitudinal structural member (7) and then is fixedly connected with the longitudinal structural member (7).
4. A foundation pit enclosure according to claim 1 wherein: the anchor cable I (5) and the anchor cable II (8) are arranged at intervals in the horizontal direction.
5. A foundation pit enclosure according to claim 1 wherein: if the stress pipe piles (9) are inserted into the TRD equal-thickness cement soil mixing wall (4) at intervals, the prestress pipe piles (9) are arranged corresponding to the row piles (1).
6. A foundation pit enclosure according to claim 1 wherein: a plurality of H-shaped steel (10) are inserted into the TRD equal-thickness cement soil mixing wall (4) at intervals, and the H-shaped steel (10) and the row piles (1) are arranged correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429512.8U CN210031840U (en) | 2019-04-01 | 2019-04-01 | Foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429512.8U CN210031840U (en) | 2019-04-01 | 2019-04-01 | Foundation pit support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210031840U true CN210031840U (en) | 2020-02-07 |
Family
ID=69357625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920429512.8U Expired - Fee Related CN210031840U (en) | 2019-04-01 | 2019-04-01 | Foundation pit support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210031840U (en) |
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2019
- 2019-04-01 CN CN201920429512.8U patent/CN210031840U/en not_active Expired - Fee Related
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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: 20200207 |