CN113774922B - Foundation pit support structure and construction method thereof - Google Patents
Foundation pit support structure and construction method thereof Download PDFInfo
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- CN113774922B CN113774922B CN202111146636.3A CN202111146636A CN113774922B CN 113774922 B CN113774922 B CN 113774922B CN 202111146636 A CN202111146636 A CN 202111146636A CN 113774922 B CN113774922 B CN 113774922B
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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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Abstract
The application relates to the technical field of foundation pit bracing, in particular to a foundation pit bracing structure and a construction method thereof. Wherein a foundation ditch envelope, it includes the first section well body and a plurality of anti scouring board of connecting in first section well body upstream face one side, the vertical sliding connection of anti scouring board is in the lateral wall of the first section well body, can dismantle on the anti scouring board and be connected with the showy subassembly that is used for providing buoyancy to anti scouring board. This application has and provides the protection to the upstream face one side riverbed of the first section well body, ensures the construction quality's of the first section well body effect.
Description
Technical Field
The application relates to the technical field of foundation pit bracing, in particular to a foundation pit bracing structure and a construction method thereof.
Background
The enclosure structure of the foundation pit mainly bears water pressure and soil pressure generated by unloading during excavation of the foundation pit, wherein the enclosure structure of the soft foundation usually adopts a sunk well structure, and particularly excavates the foundation pit on a riverbed which is soft in texture and is muddy soil.
When the open caisson structure is adopted for construction in a flow area, the common foundation pit support structure comprises a first section well body, a high-connection well body positioned at the top end of the first section well body and a sealing bottom plate positioned at the bottom end of the first section well body.
The first section of the well body usually adopts a steel box structure formed by enclosing a plurality of plates, and the plates are vertically provided with positioning sinking grooves. The well wall of the high well body corresponds to and is fixedly connected to the top end of the plate, and the high well body is formed by pouring reinforced concrete.
With respect to the related art in the above, the inventors consider that: when the positioning sinking groove of the first-section well body is filled with concrete and sinks, because the water flow impacts the upstream surface of the first-section well body, a rotational flow towards the riverbed is formed at the bottom end of the first-section well body, the rotational flow scours the riverbed and carries soil, the whole first-section well body is inclined towards the upstream surface, and the construction quality of the first-section well body is affected.
Disclosure of Invention
In order to reduce the inclination of the first-section well body during open caisson construction and guarantee the construction quality of the first-section well body, the application provides a foundation pit support structure and a construction method thereof.
In a first aspect, the application provides a foundation pit support structure, which adopts the following technical scheme:
the utility model provides a foundation pit retaining structure, its includes the first section well body and a plurality of anti-scouring board of connecting in first section well body upstream face one side, the vertical sliding connection of anti-scouring board is in the lateral wall of the first section well body, can dismantle on the anti-scouring board and be connected with the showy subassembly that is used for providing buoyancy to anti-scouring board.
Through adopting above-mentioned technical scheme, when floating the subassembly and be connected with anti scouring board, float the subassembly and can make anti scouring board float in aqueous to float the transportation with first section well body together aquatic. The floating assembly and the anti-scouring plate are detached and separated, and the anti-scouring plate is abutted against the riverbed on one side of the upstream face under the action of gravity, so that the riverbed is protected, and the probability that the riverbed is scoured by the rotational flow formed by water flow impacting the first section of well body is reduced.
Optionally, energy dissipation grooves are formed in the upper surface of the anti-scouring plate, the cross sections of the energy dissipation grooves are arc-shaped, and one end, close to the first-section well body, of each energy dissipation groove is higher than one end, away from the first-section well body, of each energy dissipation groove.
By adopting the technical scheme, the rotational flow deviates from the flow of the riverbed along the arc-shaped groove wall of the energy dissipation groove, so that the protective effect of the anti-impact brushing plate on the riverbed is improved.
Optionally, the lower surface of the anti-scouring plate is fixedly connected with a plurality of inserting piles, and the inserting piles are distributed at intervals along the upstream face of the first section of the well body.
Through adopting above-mentioned technical scheme, the bottom of grafting stake is worn to locate in the riverbed, improves the stability of being connected of anti-scouring board and riverbed, and through the anti-scouring board of whirl impact, still will resist and erode the board and provide a vertical load to the grafting stake is whole to stretch into to the riverbed in.
Optionally, the bottom end of the insertion pile is provided with a guide tip end which is convenient for the insertion pile to extend into the riverbed.
Through adopting above-mentioned technical scheme, the leading point is so that the grafting stake stretches into in the riverbed.
Optionally, clamping grooves are formed in one side, close to the axis of the first section of well body, of each anti-scouring plate; fixedly connected with a plurality of direction ribs on the upstream face of first section well body, the parallel axis setting of first section well body of direction rib, the direction rib corresponds the joint groove, the cooperation of the mutual horizontal joint in direction rib and joint groove.
Through adopting above-mentioned technical scheme, through the cooperation of joint groove with the direction rib, the first section well body provides the spacing of horizontal direction to anti scouring board is firm to be connected on the river bed. Meanwhile, when the first section of well body sinks for construction, the anti-scouring plate is connected with the first section of well body in a vertical sliding mode, so that the probability of mutual limiting interference between the anti-scouring plate and the first section of well body is reduced.
Optionally, a limiting component for limiting the impact-resistant brushing plate to be disengaged from the top end of the guide rib is detachably connected to the top end of the guide rib.
Through adopting above-mentioned technical scheme, when spacing part is connected with the top of guide rib, spacing part will reduce the probability that anti-scouring board breaks away from the guide rib top. When the limiting component is detached from the top end of the guide rib, when the first section of well body completely sinks into the river bed and the guide rib also sinks into the river bed, the top end of the anti-scouring plate self-guide rib is separated from the first section of well body, so that the probability of mutual limiting interference between the anti-scouring plate and the first section of well body is reduced.
Optionally, the floating assembly comprises a buoyancy providing part, a connecting cable and a mounting plate, the mounting plate is detachably connected to the anti-scouring plate, and the connecting cable is fixedly connected between the buoyancy providing part and the mounting plate.
Through adopting above-mentioned technical scheme, buoyancy provides the portion and can be for high-pressure gasbag, through the installation with be connected anti brush board and can dismantle the connection. Before separation mounting panel and anti brush board, the connecting cable is in the state of straining under the action of gravity of anti brush board, when mounting panel and anti brush board are dismantled, are separated, the stress release on the connecting cable, the connecting cable upwards kick-backs, will order about the mounting panel rebound, thereby the mounting panel will produce the stress of the corresponding resistance of taking out the connecting cable release with rivers this moment, compare directly be connected connecting cable and anti brush board, be connected through mounting panel and anti brush board, when can improving showy subassembly and anti brush board separation, on-the-spot personnel's security.
Optionally, the connecting cable is fixedly connected with a plurality of energy releasing blocks, and the energy releasing blocks are sequentially distributed along the axial direction of the connecting cable.
Through adopting above-mentioned technical scheme, release can the piece when the connecting cable releases stress, release can the piece and produce the resistance with rivers, eliminate the stress that the connecting cable released when floating subassembly separates with anti brush board, can further improve on-the-spot personnel's security.
In a second aspect, the application provides a construction method of a foundation pit support structure, which adopts the following technical scheme:
a construction method of a foundation pit support structure is characterized in that a first section of a well body is prefabricated in a factory, transported and hoisted to a river, and the construction method comprises the following steps of S1, preparing for operation before construction; s1-1, assembling and constructing an anti-scouring plate and a floating assembly, connecting the anti-scouring plate to the upstream surface of the prefabricated well body in a hoisting mode, and then connecting the floating assembly to the anti-scouring plate; s1-2, positioning and sinking a first section of well body, transporting the first section of well body, an anti-scouring plate and a floating assembly to a designed position together, and then loading the first section of well body for positioning and sinking; s1-3, disassembling and separating the floating component and the anti-scouring plate; s2, performing high-sinking construction on the first section of well body; s3, cleaning and constructing the first section of the well body; and S4, sealing the bottom of the foundation pit.
By adopting the technical scheme, the foundation pit is formed through the construction method. When the float assembly is connected to the erosion resistant plate, the erosion resistant plate is transported with the first section of the well. Before the first section of well body is connected with high-sinking construction, the anti-impact brushing plate and the floating assembly are separated, the anti-impact brushing plate slides downwards under the action of gravity until the anti-impact brushing plate is abutted to a river bed, so that the river bed on the side of the upstream face is protected, and the scouring of the river bed by rotational flow is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the floating assembly and the anti-scouring plate are disassembled and separated, and the anti-scouring plate is abutted against the riverbed on one side of the upstream face under the action of gravity, so that the riverbed is protected, the probability that the riverbed is scoured by rotational flow formed by water flow impacting the first section of well body is reduced, the inclination of the sinking first section of well body is reduced, and the sinking construction quality of the first section of well body is guaranteed;
2. when the floating assembly is connected with the anti-scouring plate, the floating assembly can enable the anti-scouring plate to float in water so as to be transported in water together with the first section of the well body in a floating manner;
3. when the stopper member is coupled to the top end of the guide rib, the stopper member will reduce the probability that the anti-collision brush plate will be disengaged from the top end of the guide rib. When the limiting component is detached from the top end of the guide rib, when the first section of well body completely sinks into the river bed and the guide rib also sinks into the river bed, the top end of the anti-scouring plate self-guide rib is separated from the first section of well body, so that the probability of mutual limiting interference between the anti-scouring plate and the first section of well body is reduced.
Drawings
FIG. 1 is a side view of an embodiment of the present application with an impact resistant plate attached to a float member.
Fig. 2 isbase:Sub>A schematic sectional view atbase:Sub>A-base:Sub>A in fig. 1.
FIG. 3 is a side view of an embodiment of the present application with the anti-erosion plate separated from the float member.
Description of reference numerals: 1. a first section of the well body; 2. a scouring resistant plate; 3. a horizontal clamping component; 4. a float assembly; 5. an energy dissipation groove; 6. inserting piles; 7. a leading tip; 8. a clamping groove; 9. a guide rib; 10. a limiting component; 11. a limiting flat plate; 12. a limit bolt; 13. a buoyancy providing part; 14. a connecting cable; 15. mounting a plate; 16. connecting a screw rod; 17. an energy releasing block; 18. and (4) a drop-proof groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses foundation ditch envelope. Referring to fig. 1 and 2, the foundation pit support structure comprises a first-section pit body 1 and an anti-scouring plate 2 connected to the water-facing side of the first-section pit body 1. A horizontal clamping component 3 is connected between the anti-scouring plate 2 and the first-section well body 1, and the horizontal clamping component 3 is arranged along the height direction of the first-section well body 1. The anti-scouring plate 2 is vertically connected to the horizontal clamping part 3 in a sliding manner, and the anti-scouring plate 2 is also detachably connected with a floating assembly 4 for providing buoyancy for the anti-scouring plate 2.
When the first-section well body 1 is transported in water, the anti-scouring plate 2 is connected to the first-section well body 1 through the horizontal clamping component 3. At this time, the floating assembly 4 provides buoyancy for the anti-scouring plate 2, so that the anti-scouring plate 2 can float to a designed and designated position along with the first section of the well body 1 for sinking construction.
Referring to fig. 1 and 3, during sinking construction, the floating assembly 4 and the anti-scouring plate 2 are disassembled and separated, so that the anti-scouring plate 2 slides downwards along the axial direction of the horizontal clamping component 3 under the self gravity, and the horizontal clamping component 3 restrains the anti-scouring plate 2 in the horizontal direction. When the lower surface of the anti-scouring plate 2 is attached to the bottom end of the river bed, the water flow impacts the upstream surface of the first-section well body 1 to generate rotational flow for scouring the river bed, and the rotational flow is blocked by the anti-scouring plate 2 to reduce scouring of the rotational flow on the river bed, so that the inclination amount of the first-section well body 1 towards the upstream surface side during sinking construction is reduced.
Referring to fig. 1 and 2 again, the energy dissipation groove 5 is formed in the upper surface of the anti-erosion brush plate 2, the length direction of the energy dissipation groove 5 is parallel to the length direction of the upstream face of the first-section well body 1, one end, away from the first-section well body 1, of the energy dissipation groove 5 is flush with one end, away from the first-section well body 1, of the anti-erosion brush plate 2, and one end, away from the first-section well body 1, of the energy dissipation groove 5 is lower than one end, close to the first-section well body 1, of the energy dissipation groove 5.
The arc-shaped energy dissipation groove 5 can guide the rotational flow to move away from the riverbed along the lower end of the energy dissipation groove 5, so that the scouring of the riverbed is reduced, the vertical load is generated on the anti-scouring plate 2 under the scouring of the rotational flow, and the probability that the anti-scouring plate 2 is separated from the riverbed due to the impact of the blind flow on the riverbed is reduced.
The lower surface of the anti-scouring plate 2 is fixedly connected with an inserting pile 6 which can be connected in a welding and fixing mode. The insertion pile 6 is vertically arranged, and the bottom end of the insertion pile 6 is provided with a conical guide tip 7. The diameter of the peg 6 becomes progressively larger upwards from the leading tip 7 so that the top diameter of the peg 6 is greater than the bottom diameter of the peg 6.
During the sinking construction, the inserting pile 6 penetrates through the riverbed, the guide tip 7 is convenient for the inserting pile 6 to extend into the riverbed, the diameter size of the inserting pile 6 is gradually increased from bottom to top, the contact area between the peripheral side wall of the inserting pile 6 and the riverbed is increased, the connection stability of the inserting pile 6 on the riverbed is improved, and the stability of the anti-scouring plate 2 is guaranteed.
One side of the anti-scouring plate 2 close to the first section well body 1 is provided with a vertically through clamping groove 8, and the clamping groove 8 can be a dovetail groove or a T-shaped groove. In the embodiment of the present application, the fastening groove 8 is a T-shaped groove.
The horizontal clamping part 3 comprises a guide rib 9 arranged along the height direction of the upstream face of the first-section well body 1 and a limiting part 10 detachably and fixedly connected to the top end of the guide rib 9.
The guide rib 9 is fixedly connected to the upstream surface of the first-section well body 1, the top end of the guide rib 9 is flush, and the bottom end of the guide rib 9 is inclined to form a cutting edge, so that the guide rib 9 sinks into the river bed along with the first-section well body 1. The cross section shape of guide rib 9 is the T shape of cooperation joint groove 8 shape, and guide rib 9 wears to locate in joint groove 8.
Thereby the anti-scouring board 2 through the joint groove 8 with the cooperation of guide rib 9 vertical sliding connection on the upstream face of the first section well body 1 to guide rib 9 still will restrain the horizontal displacement of anti-scouring board 2, improves the stability ability of the vertical removal of anti-scouring board 2.
The limiting component 10 comprises a limiting flat plate 11 and a limiting bolt 12 penetrating through the limiting flat plate 11, the lower surface of the limiting flat plate 11 is abutted to the top end of the guide rib 9, the limiting bolt 12 penetrates through the limiting flat plate 11 and extends into the guide rib 9, and the limiting bolt 12 is in threaded connection with the guide rib 9. The limit bolt 12 is disassembled, and the limit flat plate 11 can be taken down.
After the limiting part 10 is detached, the first-section well body 1 sinks, when the top end of the guide rib 9 is lower than the lower surface of the anti-impact brushing plate 2, the anti-impact brushing plate 2 can be separated from the top end of the guide rib 9 and the first-section well body 1, at the moment, the anti-impact brushing plate 2 is connected to a river bed through the inserting pile 6, the influence of the anti-impact brushing plate 2 on the continuous sinking construction of the first-section well body 1 is reduced, and the sinking stability of the first-section well body 1 is guaranteed.
The float assembly 4 includes a buoyancy provider 13, a connecting line 14 and a mounting plate 15. The lower surface of the mounting plate 15 abuts the upper surface of the anti-erosion plate 2. The buoyancy imparting portion 13 may be a high-pressure inflatable bladder.
The connecting cable 14 is fixedly connected between the mounting plate 15 and the buoyancy providing part 13, the connecting cable 14 is fixedly connected with energy releasing blocks 17, the energy releasing blocks 17 are distributed at intervals along the axis of the connecting cable 14, and the energy releasing blocks 17 can be foam plates. Before the mounting plate 15 and the anti-impact brushing plate 2 are disassembled, the connecting cable 14 is under the action of gravity of the anti-impact brushing plate 2 and is in a stretched straight state, when the connecting bolt is disassembled, the connecting cable 14 generates corresponding resilience force, at the moment, the energy release block 17 and the connecting cable 14 displace together, and resilience displacement of the connecting cable 14 is relieved through resistance generated by movement of water and the energy release block 17, so that safety of field personnel during disassembling the mounting plate 15 is guaranteed.
A connecting screw rod 16 vertically penetrates through the mounting plate 15, the connecting screw rod 16 penetrates through the mounting plate 15 and penetrates through a coaxial threaded connecting nut at one end of the mounting plate 15, and the other end, opposite to the connecting screw rod 16, of the connecting screw rod is fixedly connected with the mounting plate 15, so that the mounting plate 15 is detachably connected with the anti-scouring plate 2.
The mounting plate 15 is still seted up anticreep groove 18 near the one side of first section well body 1, and anticreep groove 18's shape forms looks adaptation with the cross section of guide rib 9, thereby the mounting plate 15 passes through anticreep groove 18 and the cooperation of guide rib 9 sliding connection on guide rib 9. When the mounting plate 15 and the anti-impact brush plate 2 are disassembled and separated, the anti-drop groove 18 of the mounting plate 15 is matched with the guide rib 9, so that the displacement of the mounting plate 15 in the horizontal direction is limited, the mounting plate 15 moves along the length direction of the guide rib 9 until the mounting plate 15 is separated from the top end of the guide rib 9. The mounting plate 15 vertically moves along the guide ribs 9, the probability that the mounting plate 15 is subjected to the maximum water resistance is increased, and therefore the displacement of the mounting plate 15 is driven by resilience force generated when the connecting cable 14 is self-tightened to be loosened when the mounting plate 15 and the anti-impact brushing plate 2 are separated, and safety when the mounting plate 15 is detached by field personnel is guaranteed.
The implementation principle of the foundation pit support structure of the embodiment of the application is as follows: when transporting the first-section well body 1 in a river, the anti-scouring plate 2 is firstly connected to the guide ribs 9 in a sliding mode, and the anti-scouring plate 2 is connected with the floating assembly 4, so that the anti-scouring plate 2 and the first-section well body 1 can be transported in a river in a floating mode, and the transportation cost is reduced.
When the first section of the well body 1 reaches the designed position, the anti-scouring plate 2 and the floating assembly 4 are separated, so that the anti-scouring plate 2 vertically moves along the guide rib 9 under the action of self weight until the anti-scouring plate is abutted to the river bed, and the rotational flow formed by the upstream face impacted by water flow scours the anti-scouring plate 2, so that the probability of scouring the river bed by the rotational flow is reduced. The peg 6 will extend into the river bed, improving the stability of the anti-erosion plate 2. Dismantle stop part 10, float subassembly 4 and can separate from guide rib 9 top, retrieve float subassembly 4, reduce construction cost.
When the first section well body 1 sinks to be constructed, the first section well body 1 gradually sinks into a river bed along with subsequent concrete pouring construction, and the limiting part 10 is detached, namely the first section well body 1 sinks into the river bed, the anti-scouring plate 2 can be separated from the top end of the guide rib 9 and the first section well body 1, so that the mutual interference influence between the anti-scouring plate 2 and the first section well body 1 is reduced, and the convenience in sinking construction of the first section well body 1 and the stability of the anti-scouring plate 2 are guaranteed.
The embodiment of the application also discloses a construction method of the foundation pit support structure. The first section of the well body 1 is prefabricated and formed for a factory and is transported and hung in water flow, and the construction method of the foundation pit support structure comprises the following steps: s1, preparation before construction.
S1-1, assembling and constructing an anti-impact brushing plate 2 and a floating assembly 4. The anti-erosion plate 2 is assembled on the guide rib 9 by lifting so that the anti-erosion plate 2 is connected to the first-stage shaft body 1, and then the floating assembly 4 and the stopper member 10 are installed on the anti-erosion plate 2.
Before the floating assembly 4 is installed, the buoyancy providing part 13 with proper size is selected, so that after the buoyancy providing part 13 is inflated in saturation, the buoyancy generated in water is larger than the gravity of the anti-scouring plate 2.
S1-2, positioning and sinking the first section well body 1. The first-section well body 1 and the anti-scouring plate 2 float and move in the river together in a pushing and pulling mode of a transport ship until the designed position is reached, and the position of the anti-scouring plate 2 is the upstream face of the first-section well body 1.
Then, the first-section well body 1 is loaded and fixed by adopting a carrier ship in a pulling mode, and the first-section well body 1 is abutted against the riverbed by applying load to the first-section well body 1.
S1-3, disassembling and separating the floating component 4 and the anti-scouring plate 2. The connecting nut is disassembled, and the connecting nut is easy to disassemble in a central symmetry mode when disassembled.
After the floating component 4 and the anti-scouring plate 2 are separated, the anti-scouring plate 2 moves downwards along the guide rib 9 under the action of gravity, the lower surface of the anti-scouring plate 2 is attached to a river bed, and the inserting plate of the guide rib 9 extends into the river bed.
S1-4, disassembling the limiting component 10. The limit bolt 12 is unscrewed, and then the limit plate 11 is removed.
After the stopper member 10 is removed, the mounting plate 15 is detached from the top end of the guide rib 9 by sliding the mounting plate 15.
And S2, performing high-sinking construction on the first section well body 1. And (3) supporting templates at the top end of the first section of the well body 1 along the well wall of the well body, then sequentially constructing reinforced concrete in a layered mode, and after each layer of concrete is poured and hardened, detaching the templates and moving upwards until the designed elevation is reached.
The first section of the well body 1 gradually sinks into the river bed in the process of gradually growing. At this time, the anti-scouring plate 2 separates the top end of the self-guide rib 9 from the first section well body 1, so that the probability of collision interference between the high construction concrete and the anti-scouring plate 2 is reduced, and the interference of the anti-scouring plate 2 on sinking construction is reduced.
And S3, cleaning and constructing the first section of the well body 1. And pumping water and sludge in the first section of the well body 1 by a water pump to form a foundation pit.
And S4, sealing the bottom of the foundation pit, constructing reinforced concrete in the first section of the well body 1 to form a bottom plate, and performing bottom sealing construction.
The construction method of the foundation pit support structure in the embodiment of the application has the following implementation principle: the first-section well body 1 and the anti-scouring plate 2 are convenient to transport together through the steps. When the first-section well body 1 sinks, the mutual interference between the anti-scouring plate 2 and the first-section well body 1 can be reduced.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. A foundation pit support structure is characterized in that: the anti-scouring well comprises a first-section well body (1) and a plurality of anti-scouring plates (2) connected to the water-facing side of the first-section well body (1), wherein the anti-scouring plates (2) are vertically connected to the outer side wall of the first-section well body (1) in a sliding manner, and floating assemblies (4) used for providing buoyancy for the anti-scouring plates (2) are detachably connected to the anti-scouring plates (2);
energy dissipation grooves (5) are formed in the upper surfaces of the anti-scouring plates (2), the cross sections of the energy dissipation grooves (5) are arc-shaped, and one ends, close to the first-section well body (1), of the energy dissipation grooves (5) are higher than one ends, far away from the first-section well body (1), of the energy dissipation grooves (5);
the lower surface of the anti-scouring plate (2) is fixedly connected with a plurality of inserting piles (6), and the inserting piles (6) are distributed at intervals along the upstream face of the first section of the well body (1);
clamping grooves (8) are formed in one side, close to the axis of the first-section well body (1), of each anti-scouring plate (2); the guide rib type well is characterized in that a plurality of guide ribs (9) are fixedly connected to the upstream face of the first-section well body (1), the guide ribs (9) are arranged in parallel to the axis of the first-section well body (1), the guide ribs (9) correspond to the clamping grooves (8), and the guide ribs (9) and the clamping grooves (8) are horizontally clamped and matched with each other;
the top end of the guide rib (9) is detachably connected with a limiting component (10) used for limiting the impact-resistant brushing plate (2) to be separated from the top end of the guide rib (9).
2. A foundation pit enclosure according to claim 1 wherein: the bottom end of the insertion pile (6) is provided with a guide tip (7) which is convenient for the insertion pile (6) to extend into the riverbed.
3. A foundation pit enclosure according to claim 1 wherein: the floating assembly (4) comprises a buoyancy providing part (13), a connecting cable (14) and a mounting plate (15), the mounting plate (15) is detachably connected to the anti-scouring plate (2), and the connecting cable (14) is fixedly connected between the buoyancy providing part (13) and the mounting plate (15).
4. A foundation pit enclosure according to claim 3 wherein: the energy releasing device is characterized in that a plurality of energy releasing blocks (17) are fixedly connected to the connecting cable (14), and a plurality of blocks are sequentially distributed on the energy releasing blocks (17) along the axial direction of the connecting cable (14).
5. A construction method of a foundation pit enclosure structure according to any one of claims 1-4, wherein the first section of the well body (1) is prefabricated in a factory, transported and hoisted to a river, and is characterized in that: the method comprises the following steps of S1, preparing before construction; s1-1, assembling and constructing an anti-scouring plate (2) and a floating assembly (4), connecting the anti-scouring plate (2) to the upstream face of a prefabricated well body in a hoisting mode, and then connecting the floating assembly (4) to the anti-scouring plate (2);
s1-2, positioning and sinking a first section of well body (1), conveying the first section of well body (1), an anti-scouring plate (2) and a floating assembly (4) to a designed position together, and then loading the first section of well body (1) to position and sink;
s1-3, disassembling and separating the floating component (4) and the anti-scouring plate (2);
s2, performing high-sinking construction on the first section well body (1);
s3, cleaning and constructing the interior of the first section of well body (1);
and S4, sealing the bottom of the foundation pit.
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| CN202111146636.3A CN113774922B (en) | 2021-09-28 | 2021-09-28 | Foundation pit support structure and construction method thereof |
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| CN212405208U (en) * | 2020-02-24 | 2021-01-26 | 中交武汉港湾工程设计研究院有限公司 | Cabin sealing plate structure for open caisson self-floating and floating transportation |
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2021
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| CN2905651Y (en) * | 2006-04-13 | 2007-05-30 | 远东塑胶金属工业（武汉）有限公司 | Waterborne float connecting fitting |
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| CN211849251U (en) * | 2020-01-09 | 2020-11-03 | 滁州欣皓工程技术有限公司 | Floating box type breakwater structure |
| CN212405208U (en) * | 2020-02-24 | 2021-01-26 | 中交武汉港湾工程设计研究院有限公司 | Cabin sealing plate structure for open caisson self-floating and floating transportation |
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| CN113774922A (en) | 2021-12-10 |
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