CN112376581B - Deep foundation pit supporting structure and construction method thereof - Google Patents
Deep foundation pit supporting structure and construction method thereof Download PDFInfo
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- CN112376581B CN112376581B CN202011437214.7A CN202011437214A CN112376581B CN 112376581 B CN112376581 B CN 112376581B CN 202011437214 A CN202011437214 A CN 202011437214A CN 112376581 B CN112376581 B CN 112376581B
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 19
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention discloses a deep foundation pit supporting structure and a construction method thereof, wherein the supporting structure comprises a protective frame, a supporting plate, a foundation pit side wall and a foundation pit bottom wall, the supporting plate is tightly attached to the foundation pit side wall, a fixed cross rod and a fixed vertical rod are fixed on the outer side surface of the supporting plate through fixing screws, the fixed cross rod and the fixed vertical rod are fixed in a crossed mode, a through hole is formed in the middle of the supporting plate, and a check cover is installed in the through hole.
Description
Technical Field
The invention relates to the technical field of deep foundation pit supporting, in particular to a deep foundation pit supporting structure and a construction method thereof.
Background
The deep foundation pit is an engineering with the excavation depth of more than 5 meters or the excavation depth of less than 5 meters but particularly complex geological conditions, surrounding environments and underground pipelines, the foundation pit engineering mainly comprises foundation pit supporting system design and construction and earthwork excavation and is a system engineering with strong comprehensiveness, the deep foundation pit supporting refers to a supporting, reinforcing and protecting measure adopted for the side wall of the deep foundation pit and the surrounding environment for ensuring the safety of the underground structure construction and the surrounding environment of the foundation pit, along with the high-speed development of the economy of China, the urban space is more and more dense, particularly along with the development of the coastal cities, the encountered deep foundation pit engineering is increasingly increased and is positioned in the downtown areas of the cities, so that the requirement on the foundation pit supporting structure is more and more strict and higher, the inner support can meet the requirement on the deformation control of the foundation pit while ensuring the safety of the side slope of the foundation pit, and is in a structural form consisting of a soil retaining structure and an inner support system, the foundation pit protection structure is high in rigidity, small in deformation and capable of effectively controlling deformation of the soil retaining structure and deformation of surrounding terrains, but the internal supporting structure rods of the existing foundation pit protection structure occupy more space, internal construction of workers is seriously hindered, the structure is relatively complex, and installation takes time.
Therefore, it is necessary to provide a deep foundation pit supporting structure and a construction method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a deep foundation pit supporting structure and a construction method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a deep basal pit supporting construction, includes protection frame, backup pad, ground, foundation ditch lateral wall and foundation ditch diapire, its characterized in that: the backup pad is hugged closely on the foundation ditch lateral wall, be fixed with fixed horizontal pole and fixed vertical pole through set screw on the backup pad lateral surface, cross fixation between fixed horizontal pole and the fixed vertical pole, the through-hole has been seted up in the middle of the backup pad, install contrary lid that ends in the through-hole, install the tightening rod on the through-hole horizontal direction, during the outside end that the foundation ditch was kept away from to the tightening rod inserted the foundation ditch lateral wall perpendicularly, the tightening rod tip that corresponds from top to bottom runs through fixedly through the fixed montant that has vertical setting, the top surface both sides of backup pad are fixed with the protection frame of vertical setting, install the horizontal direction's horizontal pole between the protection frame, the horizontal pole is provided with two from top to bottom altogether, two install the cylinder through the axis of rotation between the horizontal pole, post the reflection of light subsides on the cylinder.
Preferably, install the rotation installation axle on the fixed horizontal pole of installation in the backup pad, two rotate and install the telescopic link that forms between spiral shell section of thick bamboo and the screw rod between the installation axle, install the rotation hand (hold) in the middle of the screw rod, the screw thread on the screw rod of rotation hand (hold) both sides is opposite, two install the cat ladder between the fixed horizontal pole in the backup pad.
Preferably, the upper side and the right side of the supporting plate are provided with mounting grooves, the upper side and the lower side of the left side of the supporting plate are fixedly provided with mounting raised heads, the mounting grooves are matched with the mounting raised heads, and the supporting plates are fixedly connected through the mounting raised heads and the mounting grooves.
Preferably, the tightening rod comprises a screw rod part and a main rod part, a sharp end head is arranged at the top end of the right side of the main rod part, a limiting jack is arranged on the left side of the sharp end head, a rotary round table is arranged on the screw rod part, a movable screw barrel is spirally mounted on the left side of the rotary round table, a rotary handle is fixed on the side face of the movable screw barrel, and a limiting block is arranged at the top end of the left side of the screw rod part.
Preferably, an anti-seepage cloth is arranged between the supporting plate and the side wall of the foundation pit.
Preferably, the distance between the fixed vertical rod and the side wall of the foundation pit is determined jointly according to factors such as the water content of the foundation, the soil softness degree and the depth of the foundation pit.
Preferably, when the tightening rod and the fixed vertical rod are installed, the tightening rod and the fixed vertical rod are positioned by means of an underground pipeline detection technology.
During the specific construction, the method comprises the following steps;
A. leveling the side wall of the foundation pit, paving a water seepage prevention layer on the side wall of the foundation pit, and vertically paving a circle of supporting plate from the bottom wall of the foundation pit;
B. a vertical rod and a fixed cross rod are fixed on the surface of the supporting plate through fixing screws, a telescopic rod consisting of a screw cylinder and a screw rod is arranged between rotary mounting shafts on the adjacent side surfaces, and the supporting plate is tightly supported by the telescopic rod by force through rotating the screw rod;
C. after the next layer is fixedly installed, the supporting plate of the previous layer is continuously installed, and the installation convex head of the supporting plate of the previous layer is inserted into the installation groove of the next layer to realize the connection and the fixation between the upper layer and the lower layer; the same principle is carried out until the uppermost end of the foundation pit is reached;
D. mounting a protective frame on the supporting plate at the uppermost end, and surrounding the foundation pit by a circle by using the protective frame;
E. turning the hole to the outer side of the foundation pit in the transverse vertical direction through the through hole by utilizing an underground pipeline detection technology, keeping the direction and the depth of the hole turned through the through hole in the same vertical line direction consistent, installing the clamping rod into the turning hole, and keeping the inlet of the limiting jack on the clamping rod upward;
F. a fixing vertical rod is installed downwards on the ground right above the limiting insertion hole, so that the fixing vertical rod sequentially penetrates through the limiting insertion hole to limit and fix the clamping rod;
G. the movable screw cylinder is rotated to tighten the tightening rod, so that an interaction force is generated between the supporting plate and the fixed vertical rod;
H. and finishing the installation and the fixation of the deep foundation pit support.
The invention has the technical effects and advantages that: the supporting plate is reinforced in an auxiliary mode through the fixing vertical rods and the tightening rods, so that the installation amount of the supporting rods inside the foundation pit can be reduced, the occupation of the supporting rods on the internal space of the foundation pit can be reduced, the construction of workers is facilitated, meanwhile, the structure of the supporting foundation pit support inside the foundation pit can be simplified, the installation of the foundation pit support is facilitated, the foundation around the foundation pit is fixed into a whole through the supporting plates, the tightening rods and the fixing vertical rods, the foundation pit is not prone to being extruded into the foundation pit, the extrusion force of the foundation on the supporting frame is reduced, and the whole system is stable and safe.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic diagram of a support plate structure according to the present invention.
Fig. 4 is a schematic structural view of the tightening rod of the present invention.
In the figure: the protective frame comprises a protective frame 1, a foundation pit side wall 2, a foundation 3, a foundation pit 4, a foundation pit bottom wall 5, a supporting plate 6, a fixed vertical rod 7, a fixed cross rod 8, a through hole 9, a fixing screw 10, a non-return cover 11, a tightening rod 12, a fixed vertical rod 13, a light reflecting sticker 14, a roller 15, a rotating shaft 16, a cross beam 17, a ladder stand 18, a rotating installation shaft 19, a screw barrel 20, a screw rod 21, a rotating handle 22, an installation raised head 23, an installation groove 24, a rotating handle 25, a rotating circular truncated cone 26, a main rod part 27, a tip head 28, a limiting block 29, a movable screw barrel 30, a limiting jack 31 and a screw rod part 32.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a deep foundation pit supporting structure and a construction method thereof, the deep foundation pit supporting structure comprises a protective frame 1, a supporting plate 6, a foundation 3, a foundation pit 4, a foundation pit side wall 2 and a foundation pit bottom wall 5, and the deep foundation pit supporting structure is characterized in that: backup pad 6 is hugged closely on foundation ditch lateral wall 2, be fixed with fixed horizontal pole 8 and fixed vertical pole 7 through set screw 10 on the 6 lateral surfaces of backup pad, cross fixation between fixed horizontal pole 8 and the fixed vertical pole 7, through-hole 9 has been seted up in the middle of the backup pad 6, install contrary lid 11 in the through-hole 9, install on the 9 horizontal direction of through-hole and add tight pole 12, wear fixed vertical pole 13 in the tight pole 12, the top 6 top surfaces of backup pad are fixed with fender bracket 1, install horizontal pole 17 between the fender bracket 1, horizontal pole 17 is provided with two altogether, two install cylinder 15 through axis of rotation 16 between the horizontal pole, post on the cylinder 16 and paste 14 in the reflection of light.
Further, in the above technical solution, the fixed cross bar 8 mounted on the supporting plate 6 is mounted with a rotary mounting shaft 19, a telescopic rod formed between a screw cylinder 20 and a screw rod 21 is rotatably mounted between the two rotary mounting shafts 19, a rotary handle 22 is mounted in the middle of the screw rod 21, the screw threads on the screw rods 21 on both sides of the rotary handle 22 are opposite, and a ladder 18 is mounted between the two fixed cross bars 8 on the supporting plate 6.
Further, in the above technical solution, the upper side and the right side of the supporting plate 6 are provided with mounting grooves 24, the upper side and the lower side of the left side of the supporting plate 6 are fixed with mounting raised heads 23, the mounting grooves 24 and the mounting raised heads 23 are matched with each other, and the supporting plates 6 are fixedly connected through the mounting raised heads 23 and the mounting grooves 24.
Further, in the above technical scheme, the tightening rod 12 includes a screw rod portion 32 and a main rod portion 27, the top end of the right side of the main rod portion 27 is provided with a pointed end 28, the left side of the pointed end 28 is provided with a limiting jack 31, a rotating circular truncated cone 26 is arranged on the screw rod portion 32, a movable screw barrel 30 is spirally installed on the left side of the rotating circular truncated cone 26, a rotating handle 25 is fixed on the side of the movable screw barrel 30, and a limiting block 29 is arranged on the top end of the left side of the screw rod portion 32.
Further, in the above technical scheme, an anti-seepage cloth is arranged between the support plate 6 and the side wall 2 of the foundation pit.
Further, in the above technical solution, the distance between the fixed vertical rod 13 and the side wall 2 of the foundation pit is determined according to the water content of the foundation 3, the softness of the soil, the depth of the foundation pit 4 and other factors.
Further, in the above technical solution, the tightening rod 12 and the fixing vertical rod 13 are positioned by using an underground pipeline detection technology when being installed.
Further, in the above technical solution, the method comprises the following steps;
A. carrying out leveling operation on the side wall 2 of the foundation pit, paving a water seepage prevention layer on the side wall 2 of the foundation pit, and paving a circle of supporting plate 6 from the bottom wall 5 of the foundation pit;
B. a vertical rod 7 and a fixed cross rod 8 are fixed on the surface of the supporting plate 6 through a fixing screw 10, a telescopic rod consisting of a screw cylinder 20 and a screw rod 21 is arranged between rotary mounting shafts 19 on the adjacent side surfaces, and the supporting plate is forcibly supported by the telescopic rod by rotating the screw rod 21;
C. after the next layer is fixedly installed, the supporting plate 6 of the previous layer is continuously installed, and the connection and the fixation between the upper layer and the lower layer are realized by inserting the installation raised head 23 of the supporting plate 6 of the previous layer into the installation groove 24 of the next layer; the same principle is carried out until the uppermost end of the foundation pit 4 is reached;
D. mounting a protective frame 1 on the supporting plate 6 at the uppermost end, and surrounding the foundation pit 4 by using the protective frame 1 for one circle;
E. turning the hole to the outer side of the foundation pit 3 in the transverse vertical direction through the through hole 9 by using an underground pipeline detection technology, keeping the direction and the depth of the hole turned through the through hole 9 in the same vertical line direction consistent, installing the tightening rod 12 into the turning hole, and keeping the inlet of the limiting insertion hole 31 on the tightening rod 12 upward;
F. the fixing vertical rod 13 is downwards arranged on the ground right above the limiting insertion hole 31, so that the fixing vertical rod 13 sequentially penetrates through the limiting insertion hole 31 to limit and fix the clamping rod 12;
G. the tightening rod 12 is tightened by rotating the movable screw cylinder 30, so that there is an interaction force between the support plate 6 and the fixed vertical rod 13.
H. And finishing the installation and the fixation of the deep foundation pit support.
The working principle of the invention is as follows: firstly, leveling the side wall of a foundation pit, paving a water seepage prevention layer on the side wall of the foundation pit, paving a circle of supporting plates from the bottom wall of the foundation pit, fixing a vertical rod and a fixed cross rod on the surface of each supporting plate through fixing screws, installing a telescopic rod consisting of a screw cylinder and a screw rod between rotary installing shafts on adjacent side surfaces, forcibly supporting the supporting plates by rotating the screw rods, continuously installing the supporting plates on one layer after the next layer is fixedly installed, and inserting an installing raised head of the supporting plate on the previous layer into an installing groove on the next layer to realize the connection and fixation between the upper layer and the lower layer; according to the same principle until reaching the foundation ditch topmost, install the fender bracket in the backup pad of topmost, utilize the fender bracket to enclose the round with the foundation ditch, utilize pipeline detection technique to pass through the through-hole and turn to the horizontal vertical direction in the foundation ditch outside hole, and the direction and the degree of depth through the hole that the through-hole changes on same vertical line direction keep unanimous, and will step up the pole and install in turning to the hole, keep simultaneously that the spacing jack import on the pole that steps up upwards, subaerial fixed montant of installation downwards directly over spacing jack, make fixed montant pass spacing jack in proper order, realize spacing fixed to the pole that steps up, make to step up the pole tighten through rotating movable barrel, thereby make to have interact's power between backup pad and the fixed montant.
Finally, it should be noted that: 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 (5)
1. The utility model provides a deep basal pit supporting construction, includes protection frame (1), backup pad (6), ground (3), foundation ditch (4), foundation ditch lateral wall (2) and foundation ditch diapire (5), its characterized in that: the supporting plate (6) is tightly attached to the side wall (2) of the foundation pit, a fixed transverse rod (8) and a fixed vertical rod (7) are fixed on the outer side surface of the supporting plate (6) through a fixing screw (10), the fixed transverse rod (8) and the fixed vertical rod (7) are fixed in a cross mode, a through hole (9) is formed in the middle of the supporting plate (6), a check cover (11) is installed in the through hole (9), a tightening rod (12) is installed in the horizontal direction of the through hole (9), the outer side end, far away from the foundation pit (4), of the tightening rod (12) is vertically inserted into the side wall of the foundation pit, the end portions of the tightening rod (12) corresponding to each other up and down penetrate through and are fixed through a fixed vertical rod (13) with vertical arrangement, protective frames (1) with vertical arrangement are fixed on two sides of the top surface of the supporting plate (6) at the top, and a transverse rod (17) in the horizontal direction is installed between the protective frames (1), the transverse rods (17) are provided with an upper transverse rod and a lower transverse rod, a roller (15) is installed between the two transverse rods through a rotating shaft (16), and a reflective sticker (14) is attached to the roller (15);
a fixed cross rod (8) arranged on the supporting plate (6) is provided with a rotary mounting shaft (19), a telescopic rod formed between a screw cylinder (20) and a screw rod (21) is rotatably arranged between the two rotary mounting shafts (19), a rotary handle (22) is arranged in the middle of the screw rod (21), the screw threads on the screw rods (21) at two sides of the rotary handle (22) are opposite, and a ladder stand (18) is arranged between the fixed cross rods (8) on the two supporting plates (6);
the tightening rod (12) comprises a screw rod part (32) and a main rod part (27), a sharp end head (28) is arranged at the top end of the right side of the main rod part (27), a limiting insertion hole (31) is arranged on the left side of the sharp end head (28), a rotating round table (26) is arranged on the screw rod part (32), a movable screw barrel (30) is spirally arranged on the left side of the rotating round table (26), a rotating handle grip (25) is fixed on the side surface of the movable screw barrel (30), and a limiting block (29) is arranged at the top end of the left side of the screw rod part (32);
mounting grooves (24) are formed in the upper side face and the right side face of the supporting plate (6), mounting raised heads (23) are fixed on the upper side face and the lower side face of the left side face of the supporting plate (6), the mounting grooves (24) are matched with the mounting raised heads (23), and the supporting plate (6) is fixedly connected with the mounting grooves (24) through the mounting raised heads (23).
2. A deep foundation pit supporting construction according to claim 1, wherein: and anti-seepage cloth is arranged between the supporting plate (6) and the side wall (2) of the foundation pit.
3. A deep foundation pit supporting construction according to claim 1, wherein: the distance between the fixed vertical rod (13) and the side wall (2) of the foundation pit is determined jointly according to the water content of the foundation (3), the soft degree of soil and the depth of the foundation pit (4).
4. A deep foundation pit supporting construction according to claim 1, wherein: when the tightening rod (12) and the fixed vertical rod (13) are installed, the tightening rod and the fixed vertical rod are positioned by means of an underground pipeline detection technology.
5. A construction method of a deep foundation pit supporting structure according to any one of claims 1 to 4, comprising the steps of:
A. carrying out leveling operation on the side wall (2) of the foundation pit, paving a water seepage prevention layer on the side wall (2) of the foundation pit, and vertically paving a circle of supporting plate (6) from the bottom wall (5) of the foundation pit;
B. a vertical rod (7) and a fixed cross rod (8) are fixed on the surface of the supporting plate (6) through a fixing screw (10), a telescopic rod consisting of a screw cylinder (20) and a screw rod (21) is arranged between rotary mounting shafts (19) on the adjacent sides, and the supporting plate is forcibly braced by the telescopic rod by rotating the screw rod (21);
C. after the next layer is fixedly installed, the supporting plate (6) of the previous layer is continuously installed, and the connection and the fixation between the upper layer and the lower layer are realized by inserting the installation raised head (23) of the supporting plate (6) of the previous layer into the installation groove (24) of the next layer; the same principle is carried out until the uppermost end of the foundation pit (4) is reached;
D. mounting a protective frame (1) on the supporting plate (6) at the uppermost end, and surrounding the foundation pit (4) by using the protective frame (1) for one circle;
E. the hole is rotated towards the transverse vertical direction of the outer side of the foundation pit (4) through the through hole (9) by utilizing the underground pipeline detection technology, the direction and the depth of the hole rotated through the through hole (9) in the same vertical line direction are kept consistent, the tightening rod (12) is installed in the rotating hole, and meanwhile, the inlet of the limiting insertion hole (31) on the tightening rod (12) is kept upward;
F. a fixing vertical rod (13) is downwards arranged on the ground right above the limiting insertion hole (31), so that the fixing vertical rod (13) sequentially penetrates through the limiting insertion hole (31) to limit and fix the clamping rod (12);
G. the tightening rod (12) is tightened by rotating the movable screw cylinder (30), so that the supporting plate (6) and the fixed vertical rod (13) have interaction force;
H. and finishing the installation and the fixation of the deep foundation pit support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437214.7A CN112376581B (en) | 2020-12-10 | 2020-12-10 | Deep foundation pit supporting structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011437214.7A CN112376581B (en) | 2020-12-10 | 2020-12-10 | Deep foundation pit supporting structure and construction method thereof |
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| CN112376581A CN112376581A (en) | 2021-02-19 |
| CN112376581B true CN112376581B (en) | 2022-05-13 |
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| CN211143081U (en) * | 2019-09-20 | 2020-07-31 | 岳连成 | Subway deep basal pit supporting construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170284055A1 (en) * | 2016-03-29 | 2017-10-05 | Hydrogard, LLC | System and method for mounting a waterproofing system to shoring for an excavation wall |
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| CN209523200U (en) * | 2018-12-04 | 2019-10-22 | 南通勘察设计有限公司 | Pattern foundation pit supporting structure bracing means |
| CN209482315U (en) * | 2018-12-21 | 2019-10-11 | 葛鹏 | A kind of deep foundation pit supporting structure that impact resistant capability is strong |
| CN110158617A (en) * | 2019-06-24 | 2019-08-23 | 中信国安建工集团有限公司 | Combined type deep foundation pit support stability maintenance structure and method |
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| CN112376581A (en) | 2021-02-19 |
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