CN213978972U - Soil nail and miniature steel pipe pile combined supporting system for deep foundation pit in soft soil area - Google Patents
Soil nail and miniature steel pipe pile combined supporting system for deep foundation pit in soft soil area Download PDFInfo
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- CN213978972U CN213978972U CN202022301672.XU CN202022301672U CN213978972U CN 213978972 U CN213978972 U CN 213978972U CN 202022301672 U CN202022301672 U CN 202022301672U CN 213978972 U CN213978972 U CN 213978972U
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Abstract
The utility model discloses a weak soil area deep basal pit soil nail and miniature steel-pipe pile combination support system, including soil nail body, guan liang and push rod, the outside of soil nail body closely laminates and has the installation frame, and the right side of installation frame closely laminates and have guanliang, the internally mounted of guanliang has the drilling rod, and the downside of drilling rod installs from boring the steel pipe, the outside top threaded connection of self-boring steel pipe has stop screw, and has seted up the grout groove from the inside of boring the steel pipe. This weak soil area deep basal pit soil nail and miniature steel-pipe pile combination support system, effectively solve the problem of strutting under the narrow area weak soil geological environment, great reduction construction cost, the pneumatic pipe machine device of beating that is provided with the leading truck carries out the soil nail construction, realize that the soil nail is installed fast and accurate location, practice thrift construction period greatly, the structure atress is more even, effectively reduce the bearing capacity design parameter of each subsection, reduce soil nail and miniature steel-pipe pile use amount, reduce engineering cost.
Description
Technical Field
The utility model relates to a foundation ditch technical field specifically is a weak soil area deep basal pit soil nail and miniature steel-pipe pile combination support system.
Background
At present, domestic medium-high-rise buildings and super high-rise buildings are more and more, so that the scale and the depth of a foundation pit are continuously increased, the surrounding environment of the newly-built foundation pit is more and more complex, the traditional single-form supporting mode is difficult to be safely and efficiently applied under the condition, a combined supporting and reinforcing mode is developed to ensure the integral stability and the safety of the foundation pit, generally, a pile anchor support at the lower part of an upper soil nail and a combined supporting and protecting of a cement mixing pile and a composite soil nail are adopted, the combined supporting and reinforcing mode on the market is various, and some defects still exist;
however, in the existing combined support, the support problem exists in a soft soil geological environment in a narrow area, the construction cost is high, soil nails are inconvenient to install and position, the construction period is long, the structural stress is not uniform enough, and the use amount of the soil nails and the micro steel pipe piles is large, so that a combined support system of the soil nails and the micro steel pipe piles in the deep foundation pit in the soft soil area is provided, so that the problem provided in the above is solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a weak soil area deep basal pit soil nail and miniature steel-pipe pile combination support system to there is the problem of strutting in the current combination support system that proposes in solving above-mentioned background art under the narrow area weak soil geological environment, construction cost is higher, the inconvenient installation of soil nail and location, construction period is longer, the structure atress is not enough even, the problem of soil nail and miniature steel-pipe pile use amount.
In order to achieve the above object, the utility model provides a following technical scheme: a combined supporting system of a deep foundation pit soil nail and a miniature steel pipe pile in a soft soil area comprises a soil nail body, a crown beam and a push rod, wherein an installation frame is tightly attached to the outer side of the soil nail body, the crown beam is tightly attached to the right side of the installation frame, a drill rod is installed inside the crown beam, a self-drilling steel pipe is installed on the lower side of the drill rod, a limit screw is in threaded connection with the upper portion of the outer side of the self-drilling steel pipe, a grouting groove is formed in the self-drilling steel pipe, a through hole is integrally formed in the outer side of the grouting groove, a spiral drill bit is welded on the lower side of the self-drilling steel pipe, a drainage groove is formed in the right side of the self-drilling steel pipe, a guide rail is arranged on the upper side of the crown beam, a guide sleeve is tightly attached to the outer side of the guide rail, a positioning, the spring is wound on the outer side of the air pick, and the positioning sleeve is integrally arranged in the middle of the push rod.
Preferably, the soil nail body is array distribution on the installation frame, and the longitudinal section of installation frame is latticed structure to the soil nail body inclines on the vertical plane and sets up.
Preferably, the drill rod and the crown beam are connected in a clamping groove connection mode, and the length of the cross section of the drill rod is smaller than that of the cross section of the self-drilling steel pipe.
Preferably, the through holes are distributed on the grouting groove at equal intervals, the through holes are symmetrically arranged about a vertical central axis of the grouting groove, and the vertical central axis of the grouting groove is superposed with a vertical central axis of the self-drilling steel pipe.
Preferably, the push rod and the guide rail are vertically arranged on a vertical surface, the guide rail and the guide sleeve are connected in a clamping groove connection mode, and the guide rail and the guide sleeve are connected with the positioning pin in a through connection mode.
Preferably, the air pick forms a sliding structure on the supporting plate, and the springs are symmetrically arranged about a horizontal central axis of the air pick.
Compared with the prior art, the beneficial effects of the utility model are that: the combined supporting system of the soil nails of the deep foundation pit and the miniature steel pipe piles in the soft soil area effectively solves the supporting problem in the soft soil geological environment of the narrow area, greatly reduces the construction cost, and the pneumatic pipe punching machine device provided with the guide frame is used for carrying out soil nail construction, so that the rapid installation and accurate positioning of the soil nails are realized, the construction period is greatly shortened, the structural stress is more uniform, the bearing capacity design parameters of all subsections are effectively reduced, the use amount of the soil nails and the miniature steel pipe piles is reduced, and the construction cost is reduced;
1. the self-drilling steel pipe is driven into a soil body through a self-drilling technology and a spiral drill bit, pressure grouting is carried out after self-drilling of the self-drilling steel pipe is finished, slurry can penetrate into the surrounding soil body to be partially cured, the overall rigidity between piles and pile soil is increased, concrete slurry is poured into the self-drilling steel pipe from the grouting groove, and the slurry is uniformly distributed on the outer side of the self-drilling steel pipe through the through holes distributed at equal intervals on the outer side of the grouting groove, so that the supporting problem in the soft soil geological environment of a narrow area is effectively solved, and the construction cost is greatly reduced;
2. the soil nail installing device is provided with a guide sleeve, an installing frame and guide rails, the guide sleeves on the two sides of the air pick are oppositely arranged through gaps of the guide sleeves on the two sides of the air pick, the guide sleeves are respectively sleeved on the two guide rails through the gaps, the guide sleeves slide relative to the guide rails, a soil nail body is driven into a side slope, the included angle between the soil nail body driven into the side slope and the side slope is kept constant, the soil nail is quickly installed and accurately positioned, the construction period is greatly saved, and the structural stress is more uniform;
3. be provided with the soil nail body, crown beam and installation frame, through the connection in installation frame department, make the soil pressure of foundation ditch slope body partly transmit to stable stratum by the soil nail body and share, partly transmit to the stable stratum outside the self-drilling steel pipe and share, pass through the anchor section with the pressure on the soil nail body and transmit in stable stratum, thereby make the gliding force of slope body obtain effective control, effectively reduce the bearing capacity design parameter of each subsection, reduce soil nail and miniature steel-pipe pile use amount, reduce engineering cost.
Drawings
Fig. 1 is a schematic view of the front cross-sectional structure of the present invention;
FIG. 2 is a schematic view of a side view cross-sectional structure of the installation frame and the soil nail body of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;
fig. 4 is the utility model discloses the overall structure schematic diagram is connected to uide bushing and locating pin.
In the figure: 1. a soil nail body; 2. a mounting frame; 3. a crown beam; 4. a drill stem; 5. a limit screw; 6. self-drilling a steel pipe; 7. grouting grooves; 8. a through hole; 9. a helical drill bit; 10. a water discharge tank; 11. a push rod; 12. a guide rail; 13. a positioning sleeve; 14. a pneumatic pick; 15. a guide sleeve; 16. positioning pins; 17. a spring; 18. and a support plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a deep foundation pit soil nail and miniature steel pipe pile combined supporting system in a soft soil area comprises a soil nail body 1, an installation frame 2, a crown beam 3, a drill rod 4, a limit screw 5, a self-drilling steel pipe 6, a grouting groove 7, a through hole 8, a spiral drill bit 9, a drainage groove 10, a push rod 11, a guide rail 12, a positioning sleeve 13, an air pick 14, a guide sleeve 15, a positioning pin 16, a spring 17 and a supporting plate 18, wherein the installation frame 2 is tightly attached to the outer side of the soil nail body 1, the crown beam 3 is tightly attached to the right side of the installation frame 2, the drill rod 4 is installed inside the crown beam 3, the self-drilling steel pipe 6 is installed on the lower side of the drill rod 4, the limit screw 5 is in threaded connection with the upper portion of the outer side of the self-drilling steel pipe 6, the grouting groove 7 is formed inside the self-drilling steel pipe 6, the through hole 8 is integrally formed in the outer side of the grouting groove 7, the spiral drill bit 9 is welded on the lower side of the self-drilling steel pipe 6, the right side of the self-drilling steel pipe 6 is provided with the drainage groove 10, the upper side of the crown beam 3 is provided with a guide rail 12, the outer side of the guide rail 12 is tightly attached with a guide sleeve 15, an inner clamping groove of the guide sleeve 15 is connected with a positioning pin 16, the inner side of the guide rail 12 is welded with a support plate 18, the inner part of the support plate 18 is movably connected with an air pick 14, the outer side of the air pick 14 is wound with a spring 17, and the middle part of the push rod 11 is integrally provided with a positioning sleeve 13.
As shown in fig. 1 and 2, the soil nail bodies 1 are distributed on the installation frame 2 in an array manner, the longitudinal section of the installation frame 2 is of a grid structure, and the soil nail bodies 1 are arranged in an inclined manner on a vertical surface, so that part of the soil pressure of the foundation pit slope can be transferred to a stable stratum by the soil nail bodies 1 for sharing, as shown in fig. 1 and 2, the drill rods 4 and the crown beams 3 are connected in a clamping groove connection manner, the length of the cross sections of the drill rods 4 is smaller than that of the self-drilling steel pipes 6, the steel is shared through the stable stratum, the structural stress is more uniform, as shown in fig. 2, the through holes 8 are distributed at equal intervals in the grouting grooves 7, the through holes 8 are symmetrically arranged about the vertical central axis of the grouting grooves 7, and the vertical central axes of the grouting grooves 7 and the self-drilling steel pipes 6 are coincident, the concrete is convenient to pour, and the ultimate bearing capacity of the pile foundation is greatly improved;
as shown in fig. 1, 3 and 4, the push rod 11 and the guide rail 12 are vertically arranged on a vertical surface, the guide rail 12 and the guide sleeve 15 are connected in a clamping groove connection mode, the guide rail 12 and the guide sleeve 15 are both connected with the positioning pin 16 in a through connection mode, the pneumatic pick 14 can be effectively supported, as shown in fig. 3, the pneumatic pick 14 forms a sliding structure on the supporting plate 18, and the springs 17 are symmetrically arranged relative to a horizontal central axis of the pneumatic pick 14, so that the rapid installation and the accurate positioning of the soil nail body 1 are realized, and the construction period is greatly saved.
The working principle is as follows: when the deep foundation pit soil nail and miniature steel pipe pile combined supporting system is used in the soft soil area, firstly, as shown in attached drawings 1, 3 and 4, the guiding structure of the foundation slope reinforcement pneumatic pipe-driving machine comprises two parallel guide rails 12 and a supporting plate 18 fixed between the two guide rails 12, a guide sleeve 15 is positioned on a pushing frame, a guiding gap is arranged on the guide sleeve 15, the gaps of the guide sleeve 15 on two sides of an air pick 14 are oppositely arranged, the guide sleeves 15 on two sides of the air pick 14 are respectively sleeved on the two guide rails 12 through the gaps, the guide sleeves 15 slide relative to the guide rails 12, the soil nail body 1 is driven into the slope through a mounting frame 2, the included angle between the soil nail body 1 driven into the slope is ensured to be constant, accurate positioning is realized, the construction period is greatly saved, a positioning pin 16 is connected with the guide sleeve 15 and a clamping groove of the guide rails 12, and the guide sleeve 15 can be fixed, the spring 17 can reduce the vibration of the hand-held air pick 14;
as shown in attached figures 1 and 2, through the connection at the crown beam 3, a part of the soil pressure of the foundation pit slope is transmitted to a stable stratum by the soil nail body 1 to be shared, and a part of the soil pressure is transmitted to the stable stratum outside the self-drilling steel pipe 6 to be shared, so that the structural stress is more uniform, the tension force generated by the soil pressure on the structure by the upper soil nail body 1 is transmitted to the soil nail by the installation frame 2, the pressure on the soil nail body 1 is transmitted to the stable stratum by the anchoring section, the gliding force of the slope is effectively controlled, the stability of the foundation pit is maintained, the construction quality and safety of the foundation pit support are ensured, the self-drilling steel pipe 6 is driven into the soil body through the self-drilling technology and the spiral drill bit 9, the self-drilling steel pipe 6 can squeeze the soil body to improve the soil body strength, after the self-drilling of the pile is finished, the pressure grouting is carried out, on one hand, the grouting pressure can generate a compaction effect on the surrounding soil body, the mud can penetrate into the surrounding soil body to be partially solidified, the soil body property is further improved, the integral rigidity between piles and between pile soil is increased, the synergy performance is better, the concrete mud is poured from the grouting groove 7, the mud is uniformly distributed on the outer side of the self-drilling steel pipe 6 through the through holes 8 which are distributed at equal intervals outside the grouting groove 7, a series of operations of the deep foundation pit soil nail and micro steel pipe pile combined supporting system in the soft soil area are completed, and the content which is not described in detail in the description belongs to the prior art which is known by persons skilled in the art.
The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a soft soil area deep basal pit soil nail and miniature steel-pipe pile combination braced system, includes soil nail body (1), crown beam (3) and push rod (11), its characterized in that: the outer side of the soil nail body (1) is tightly attached with an installation frame (2), the right side of the installation frame (2) is tightly attached with a crown beam (3), a drill rod (4) is installed inside the crown beam (3), a self-drilling steel pipe (6) is installed on the lower side of the drill rod (4), a limiting screw (5) is in threaded connection with the upper portion of the outer side of the self-drilling steel pipe (6), a grouting groove (7) is formed inside the self-drilling steel pipe (6), a through hole (8) is integrally formed in the outer side of the grouting groove (7), a spiral drill bit (9) is welded on the lower side of the self-drilling steel pipe (6), a drainage groove (10) is formed in the right side of the self-drilling steel pipe (6), a guide rail (12) is arranged on the upper side of the crown beam (3), a guide sleeve (15) is tightly attached to the outer side of the guide rail (12), and a positioning pin (16) is connected with an internal clamping groove of the guide sleeve (15), the inboard welding of guide rail (12) has backup pad (18), and the inside swing joint of backup pad (18) has pneumatic pick (14), the outside winding of pneumatic pick (14) has spring (17), the middle part integration of push rod (11) is provided with position sleeve (13).
2. The soil nail and miniature steel pipe pile combined supporting system for the deep foundation pit in the soft soil area according to claim 1, characterized in that: soil nail body (1) is array distribution on installation frame (2), and the longitudinal section of installation frame (2) is latticed structure to soil nail body (1) slope setting on vertical face.
3. The soil nail and miniature steel pipe pile combined supporting system for the deep foundation pit in the soft soil area according to claim 1, characterized in that: the drill rod (4) is connected with the crown beam (3) in a clamping groove connection mode, and the length of the cross section of the drill rod (4) is smaller than that of the self-drilling steel pipe (6).
4. The soil nail and miniature steel pipe pile combined supporting system for the deep foundation pit in the soft soil area according to claim 1, characterized in that: the through holes (8) are distributed on the grouting groove (7) at equal intervals, the through holes (8) are symmetrically arranged about the vertical central axis of the grouting groove (7), and the vertical central axis of the grouting groove (7) is coincided with the vertical central axis of the self-drilling steel pipe (6).
5. The soil nail and miniature steel pipe pile combined supporting system for the deep foundation pit in the soft soil area according to claim 1, characterized in that: push rod (11) and guide rail (12) set up perpendicularly on the vertical face, and guide rail (12) and uide bushing (15) adopt the mode of draw-in groove connection to guide rail (12) and uide bushing (15) all are connected with locating pin (16) adoption through connection's mode.
6. The soil nail and miniature steel pipe pile combined supporting system for the deep foundation pit in the soft soil area according to claim 1, characterized in that: the air pick (14) forms a sliding structure on the supporting plate (18), and the springs (17) are symmetrically arranged around the horizontal central axis of the air pick (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022301672.XU CN213978972U (en) | 2020-10-16 | 2020-10-16 | Soil nail and miniature steel pipe pile combined supporting system for deep foundation pit in soft soil area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022301672.XU CN213978972U (en) | 2020-10-16 | 2020-10-16 | Soil nail and miniature steel pipe pile combined supporting system for deep foundation pit in soft soil area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213978972U true CN213978972U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022301672.XU Active CN213978972U (en) | 2020-10-16 | 2020-10-16 | Soil nail and miniature steel pipe pile combined supporting system for deep foundation pit in soft soil area |
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| Country | Link |
|---|---|
| CN (1) | CN213978972U (en) |
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- 2020-10-16 CN CN202022301672.XU patent/CN213978972U/en active Active
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