CN218204422U - Foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination - Google Patents
Foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination Download PDFInfo
- Publication number
- CN218204422U CN218204422U CN202221165939.XU CN202221165939U CN218204422U CN 218204422 U CN218204422 U CN 218204422U CN 202221165939 U CN202221165939 U CN 202221165939U CN 218204422 U CN218204422 U CN 218204422U
- Authority
- CN
- China
- Prior art keywords
- pile
- prc
- waterproof curtain
- tubular pile
- foundation pit
- 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
- 239000011513 prestressed concrete Substances 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract 2
- 238000010276 construction Methods 0.000 claims description 12
- 239000004567 concrete Substances 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination, belonging to the technical field of constructional engineering; the pile sinking method comprises the following steps of (1) taking a PRC (prestressed concrete) pipe pile, a waterproof curtain taking a high-pressure jet grouting pile or a cement soil mixing pile as a pile sinking measure of the PRC pipe pile, a prestressed anchor cable and a steel waist beam; the left side of the waterproof curtain is perpendicular to the bottom of the foundation pit along the boundary of the foundation pit, the upper end of the waterproof curtain is flush with the natural ground, the lower end of the waterproof curtain is positioned at the underground water below the bottom of the foundation pit, and a water retaining wall is arranged on the natural ground on the right side of the waterproof curtain; the PRC tubular pile is arranged in the PRC tubular pile corresponding to the central line of the waterproof curtain; the prestressed anchor cable is arranged in a soil layer below the natural ground on the right side of the waterproof curtain, and the left end of the prestressed anchor cable penetrates through the waterproof curtain and the PRC tubular pile to be fixedly connected with the steel waist beam. The utility model discloses a supporting structure for foundation ditch to PRC tubular pile replaces the bored concrete pile, utilizes high pressure jet grouting pile or cement soil mixing pile to regard as the stagnant water curtain simultaneously, and reduction of erection time reduces engineering cost.
Description
Technical Field
The utility model relates to a building engineering technical field, concretely relates to foundation ditch supporting construction of PRC tubular pile and prestressed anchorage cable combination.
Background
The PRC tubular pile is the same as a common prestressed concrete tubular pile, and consists of concrete, a reinforcement cage and an end plate, and the difference is that a certain amount of non-prestressed reinforcement is added in the reinforcement cage in addition to the prestressed reinforcement to form a novel mixed reinforcement cage, the reinforcement rate is high and is 1.5-2 times of that of the common tubular pile; compared with the traditional prestressed pipe pile, the PRC pipe pile has the advantages of improved horizontal bearing capacity and improved deformation performance, is suitable for low-bearing-platform pile foundations of common industrial and civil buildings, and can also be used for pile foundation and rigid pile composite foundation engineering in foundation pits, side slopes, embankments and soft soil areas.
In recent years, with the requirement of urban connotative development, the foundation pit supporting design has the advantages of competitive economy, environmental protection and construction period while meeting the necessary technical requirements; the PRC tubular pile is difficult to form in the stratum such as the compact sand layer, the silt and the like, the limitation is limited, and meanwhile, in some high water level areas, the foundation pit excavation needs precipitation. Under the condition, a supporting scheme of cast-in-situ bored piles, waterproof curtains and anchor cables is generally adopted, but the supporting mode has high environmental protection pressure, difficult concrete raw material supply, great influence on construction progress, long construction period and high cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: in order to solve the limitation that the PRC tubular pile is difficult to sink in the stratum such as a sand layer, a silt layer and the like, the PRC tubular pile and prestressed anchor cable combined foundation pit supporting structure is provided, the PRC tubular pile is used for replacing a cast-in-situ bored pile, and meanwhile, a high-pressure jet grouting pile or a cement soil stirring pile is used as a waterproof curtain, so that the economy is greatly improved, and the application range of the PRC tubular pile in geotechnical engineering is enlarged.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a foundation pit supporting structure combining a PRC (prestressed concrete) pipe pile and a prestressed anchor cable comprises the PRC pipe pile, a waterproof curtain taking a high-pressure jet grouting pile or a cement-soil mixing pile as a pile sinking measure of the PRC pipe pile, the prestressed anchor cable and a steel waist beam; the left side of the waterproof curtain is perpendicular to the bottom of the foundation pit along the boundary of the foundation pit, the upper end of the waterproof curtain is flush with the natural ground, the lower end of the waterproof curtain is positioned at the underground water below the bottom of the foundation pit, and a water retaining wall is arranged on the natural ground on the right side of the waterproof curtain; the PRC tubular pile is arranged in the PRC tubular pile corresponding to the central line of the waterproof curtain; the prestressed anchor cable is arranged in a soil layer below the natural ground on the right side of the waterproof curtain, and the left end of the prestressed anchor cable penetrates through the waterproof curtain and the PRC tubular pile to be fixedly connected with the steel waist beam.
The depth of the lower end face of the waterproof curtain is not less than 500mm compared with the depth of the lower end face of the PRC tubular pile, and the diameter of the waterproof curtain at the position of the PRC tubular pile is not less than 100mm compared with the diameter of the PRC tubular pile.
PRC tubular pile is provided with a plurality ofly and is in the inside evenly distributed of water stop curtain, interval between two adjacent PRC tubular piles is greater than 800mm.
The prestressed anchor cable is made of a plurality of steel strands, and the included angle between the prestressed anchor cable and the horizontal plane is 20-30 degrees.
The number of the prestressed anchor cables is two, and the inclination angles of the two prestressed anchor cables are different.
The utility model has the advantages that:
1) The utility model discloses a supporting structure for foundation ditch to PRC tubular pile replaces the bored concrete pile, utilizes high pressure jet grouting pile or soil cement mixing pile to regard as the stagnant water curtain simultaneously, and economic nature has great promotion, has solved PRC tubular pile and has sunk the limitation of stake difficulty in strata such as sand bed, silt layer, has increased the range of application of PRC tubular pile in geotechnical engineering.
2) The utility model discloses a supporting construction of foundation ditch influences little, the no mud emission of all ring edge borders, can shorten the time limit for a project greatly, has reduced engineering cost, and simple structure convenient to use.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-natural ground, 2-foundation pit bottom, 3-waterproof curtain, 4-PRC pipe pile, 5-prestressed anchor cable, 6-steel waist beam and 7-water retaining wall.
In the figure, underground water is arranged at the bottom of the foundation pit and below the ground shadow line.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
Example (b): as shown in fig. 1, the utility model provides a foundation pit supporting structure of PRC tubular pile and prestressed anchor cable combination, including PRC tubular pile 4, waterproof curtain 3 using high-pressure jet grouting pile or cement mixing pile as pile sinking measure of PRC tubular pile 4, prestressed anchor cable 5 and steel waist beam 6; the left side of the waterproof curtain 3 is arranged along the boundary of the foundation pit and is vertical to the bottom 2 of the foundation pit, the upper end of the waterproof curtain is flush with the natural ground 1, the lower end of the waterproof curtain is positioned at the underground water below the bottom 2 of the foundation pit, and a water retaining wall 7 is arranged on the natural ground 1 on the right side of the waterproof curtain 3; the PRC tubular pile 4 is arranged in the waterproof curtain 3 corresponding to the central line of the waterproof curtain; the prestressed anchor cable 5 is arranged in a soil layer below the natural ground 1 on the right side of the waterproof curtain 3, and the left end of the prestressed anchor cable 5 penetrates through the waterproof curtain 3 and the PRC tubular pile 4 to be fixedly connected with the steel waist beam 6.
The depth of the lower end face of the waterproof curtain 3 is not less than 500mm compared with the depth of the lower end face of the PRC tubular pile 4, and the diameter of the waterproof curtain 3 at the position of the PRC tubular pile 4 is not less than 100mm compared with the diameter of the PRC tubular pile 4.
The PRC tubular piles 4 are arranged in a plurality of and uniformly distributed in the waterproof curtain 3, and the distance between every two adjacent PRC tubular piles 4 is larger than 800mm.
The prestressed anchor cable 5 is made of a plurality of steel strands, and the included angle between the prestressed anchor cable 5 and the horizontal plane is 20-30 degrees. The number of the prestressed anchor cables 5 is two, and the inclination angles of the two prestressed anchor cables 5 are different.
The working construction step:
clearing the surface of the field, determining the excavation boundary of the foundation pit, placing the waterproof curtain 3 and the PRC tubular pile 4 into the central line, and constructing the waterproof curtain 3 until the length is not less than 500mm of the pile bottom of the PRC tubular pile 4; then, constructing the PRC tubular piles 4, wherein the space, the length and the diameter of the PRC tubular piles 4 are constructed according to the design, and the central line of the PRC tubular piles is aligned with the central line of the waterproof curtain 3; and after the construction, the excavation of the first layer of earthwork is started to 50cm below the first prestressed anchor cable 5, the construction of the anchor cable and the installation of the steel waist beam 6 are started, and after the strength reaches the design requirement, the excavation of the second layer of earthwork is started, and then the construction of the second prestressed anchor cable 5 and the installation of the steel waist beam 6 are carried out.
The prestressed anchor cables 5 are installed in the holes after being drilled by a drilling tool, wherein the included angle between the first prestressed anchor cable 5 and the horizontal line is 25 degrees, and the included angle between the second prestressed anchor cable 5 and the horizontal line is 30 degrees; the waterproof curtain 3 meets the seepage-proofing requirement, and the seepage coefficient is not more than 1.0 multiplied by 10 -6 The diameter of the waterproof curtain 3 at the position of the PRC tubular pile 4 in cm/s is not less than 100mm of the diameter of the PRC tubular pile 4, so that the PRC tubular pile 4 can be smoothly pressed into the designed depth.
An anchor cable tensioning machine is further connected to the part, extending out of the steel waist beam 6, of the prestressed anchor cable 5, and after construction is completed, the prestressed anchor cable 5 is tensioned to bear force so as to fasten the landslide-prone soil body on the rock body.
The utility model discloses a supporting construction of foundation ditch influences little, the no mud emission of all ring edge borders, can shorten the time limit for a project greatly, has reduced engineering cost, and simple structure convenient to use. The PRC tubular pile is used for replacing a cast-in-situ bored pile, and meanwhile, the high-pressure jet grouting pile or the cement soil mixing pile is used as a waterproof curtain, so that the economy is greatly improved, the limitation that the PRC tubular pile is difficult to sink in the sand layer, the silt layer and other strata is solved, and the application range of the PRC tubular pile in geotechnical engineering is enlarged.
The above description is only used for illustrating the technical solutions of the present invention and not for limiting the same, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a foundation ditch supporting construction of PRC tubular pile and prestressed anchorage cable combination which characterized in that: the pile sinking method comprises the following steps of (1) forming a PRC (prestressed concrete) tubular pile (4), a waterproof curtain (3) taking a high-pressure jet grouting pile or a cement soil mixing pile as a pile sinking measure of the PRC tubular pile (4), a prestressed anchor cable (5) and a steel waist beam (6); the left side of the waterproof curtain (3) is perpendicular to the bottom (2) of the foundation pit along the boundary of the foundation pit, the upper end of the waterproof curtain is flush with the natural ground (1), the lower end of the waterproof curtain is positioned at the underground water below the bottom (2) of the foundation pit, and a water retaining wall (7) is arranged on the natural ground (1) on the right side of the waterproof curtain (3); the PRC tubular pile (4) is arranged in the waterproof curtain (3) corresponding to the central line of the waterproof curtain; the waterproof curtain is characterized in that the prestressed anchor cables (5) are arranged in a soil layer below a natural ground (1) on the right side of the waterproof curtain (3), and the left ends of the prestressed anchor cables (5) penetrate through the waterproof curtain (3), the PRC tubular piles (4) and the steel waist beam (6) to be fixedly connected.
2. The foundation pit supporting structure of the PRC tubular pile and prestressed anchor rope combination of claim 1, wherein: the depth of the lower end face of the waterproof curtain (3) is not less than 500mm compared with the depth of the lower end face of the PRC tubular pile (4), and the diameter of the waterproof curtain (3) at the position where the PRC tubular pile (4) is located is not less than 100mm compared with the diameter of the PRC tubular pile (4).
3. The foundation pit supporting structure of the PRC tubular pile and prestressed anchor rope combination of claim 1, wherein: PRC tubular pile (4) are provided with a plurality ofly and be in the inside evenly distributed of water-stop curtain (3), and the interval between two adjacent PRC tubular piles (4) is greater than 800mm.
4. The foundation pit supporting structure of claim 1, wherein the PRC tubular pile and prestressed anchor cable combined therewith comprises: the prestressed anchor cable (5) is made of a plurality of steel strands, and the included angle between the prestressed anchor cable (5) and the horizontal plane is 20-30 degrees.
5. The PRC tubular pile and prestressed anchor rope combined foundation pit supporting structure according to claim 1 or 4, wherein: the number of the prestressed anchor cables (5) is two, and the inclination angles of the two prestressed anchor cables (5) are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221165939.XU CN218204422U (en) | 2022-05-16 | 2022-05-16 | Foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221165939.XU CN218204422U (en) | 2022-05-16 | 2022-05-16 | Foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218204422U true CN218204422U (en) | 2023-01-03 |
Family
ID=84646531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221165939.XU Active CN218204422U (en) | 2022-05-16 | 2022-05-16 | Foundation pit supporting structure of PRC tubular pile and prestressed anchorage cable combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218204422U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289988A (en) * | 2023-03-15 | 2023-06-23 | 中基发展建设工程有限责任公司 | A deep foundation pit support structure of soil-rock combined stratum suspension foot piles |
| CN118756762A (en) * | 2024-07-23 | 2024-10-11 | 中交四航局第六工程有限公司 | Monitoring system and method for PRC prestressed pipe pile foundation pit support in gravel sand layer |
| CN119243725A (en) * | 2024-07-23 | 2025-01-03 | 中交四航局第六工程有限公司 | A design method for a deep foundation pit support system with PRC prestressed pipe piles in gravel and sand layers |
-
2022
- 2022-05-16 CN CN202221165939.XU patent/CN218204422U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289988A (en) * | 2023-03-15 | 2023-06-23 | 中基发展建设工程有限责任公司 | A deep foundation pit support structure of soil-rock combined stratum suspension foot piles |
| CN118756762A (en) * | 2024-07-23 | 2024-10-11 | 中交四航局第六工程有限公司 | Monitoring system and method for PRC prestressed pipe pile foundation pit support in gravel sand layer |
| CN119243725A (en) * | 2024-07-23 | 2025-01-03 | 中交四航局第六工程有限公司 | A design method for a deep foundation pit support system with PRC prestressed pipe piles in gravel and sand layers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101864773B (en) | Deep foundation pit support process | |
| CN105840207B (en) | Construction method for comprehensive tunnel entering structure of large-span tunnel penetrating shallow-buried bias-pressure loose accumulation body | |
| CN102518135A (en) | Foundation pit support construction method combining horizontal rotary jet-grouting soil bolting and bore concrete piles | |
| CN101225661A (en) | Foundation Pit Supporting Method with Pile and Anchor | |
| CN114622574B (en) | Water-rich throwing filling deep foundation pit water interception excavation supporting method and supporting device | |
| CN105604065A (en) | Foundation fit support and peat-soil deep-foundation-pit-support high-pressure jet grouting anchoring method | |
| CN206034454U (en) | Supporting construction | |
| CN110528533A (en) | A kind of microorganism solidification impacting steel tube for soil-nail and its construction method | |
| CN106948340A (en) | A kind of construction method of the Manual excavated pile structure of high polymer grouting protection | |
| CN1131221A (en) | Foundation pit slope flat anchor spray net supporting method | |
| CN210288408U (en) | Foundation pit supporting structure | |
| CN108914945A (en) | A kind of deep basal pit pile for prestressed pipe, prestress anchorage cable combined supporting construction method | |
| CN212506313U (en) | Combined foundation pit supporting structure | |
| CN101886385A (en) | Construction process of long-auger jet-grouting mixing curtain pile | |
| CN201406687Y (en) | Deep foundation pit supporting structure | |
| CN217556961U (en) | Expanding shell type prestressed anchor rod and spray anchor combined supporting structure for vertical shaft deep foundation pit | |
| CN115094946B (en) | Back wall construction method for pipe jacking construction | |
| CN105484270A (en) | Reinforcement protection construction method of high steep old rubble retaining wall adjacent to deep foundation pit | |
| CN213625605U (en) | Dig deep basal pit structure of stake anchor and hanging net injection concrete soon | |
| CN217974507U (en) | Protection system of subway tunnel structure crouches down during soft soil foundation ditch excavation | |
| CN214061636U (en) | Support-before-dig bored pile and inclined H-shaped steel enclosure | |
| CN223329873U (en) | Construction structure for constructing open caisson | |
| CN115787628B (en) | A construction method for underpinning piles and anchor piles for testing | |
| CN216839459U (en) | Vertical variable cross-section structure adjacent to deep and shallow foundation pit in foundation pit | |
| CN220565238U (en) | Pile anchor and inner support combined supporting system suitable for large-height-difference deep foundation pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |