CN114277780A - Construction method of marine soft soil foundation structure - Google Patents
Construction method of marine soft soil foundation structure Download PDFInfo
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- CN114277780A CN114277780A CN202111605388.4A CN202111605388A CN114277780A CN 114277780 A CN114277780 A CN 114277780A CN 202111605388 A CN202111605388 A CN 202111605388A CN 114277780 A CN114277780 A CN 114277780A
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Abstract
The invention discloses a construction method of a marine soft soil foundation structure, which is applied to the technical field of foundation construction and comprises the following steps: s1, compacting the marine soft soil; s2, excavating a foundation pit on the compacted marine soft soil, and arranging anchor rods on the peripheral side of the foundation pit to support the foundation pit; s3, positioning the pile position of the cast-in-place pile at the bottom of the foundation pit; a supporting sleeve is arranged at the positioning position to support the upper part of the cast-in-place pile; s4, drilling holes at the positioning positions to form filling holes, driving the limiting mechanisms to be inserted into the marine soft soil, and then pouring and forming the filling piles; s5, paving a bidirectional reinforcing mesh in the foundation pit, pouring concrete into the foundation pit, and connecting all cast-in-place piles into a whole after the concrete is formed, so that the construction of the marine soft soil foundation structure is completed. The invention has the following effects: the possibility of floating up or sinking down of the reinforcement cage can be reduced, so that the strength of the cast-in-place pile after molding is improved, and the strength of the whole foundation structure is further improved.
Description
Technical Field
The invention relates to the technical field of foundation construction, in particular to a construction method of a marine soft soil foundation structure.
Background
Soft soil is cohesive soil with large natural water content, high compressibility, low bearing capacity and very low shear strength. Soft soil is generally in a soft plastic or flow plastic state; because the strength of the soft soil is low, the construction of the soft soil foundation is particularly important when the building construction is carried out on the soft soil, and if the treatment is improper, the construction and the use are greatly influenced.
In the related art, after the soft soil is compacted, a foundation pit is excavated on the soft soil, then a plurality of filling holes are formed in the foundation pit through drilling by a pile machine, a reinforcement cage is arranged in each filling hole, then the filling holes are poured to form filling piles, and finally concrete is poured in the foundation pit to connect each filling pile into a whole, so that the strength of the whole foundation structure is ensured.
In view of the above related technologies, the inventor believes that in the process of pouring the pouring hole, the reinforcement cage in the pouring hole often floats upwards or sinks, which may result in low strength of the poured pile after molding, and further reduce the strength of the whole foundation structure.
Disclosure of Invention
In order to improve that the steel reinforcement cage can take place the come-up or sink when pouring, lead to the not high problem of the bulk strength of foundation structure, this application provides a construction method of marine soft soil foundation structure.
The technical purpose of the invention is realized by the following technical scheme: a construction method of a marine soft soil foundation structure comprises the following steps: s1, compacting the marine soft soil through equipment such as a road roller and the like;
s2, excavating a foundation pit on the compacted marine soft soil, and arranging anchor rods on the peripheral side of the foundation pit to support the foundation pit;
s3, positioning the pile position of the cast-in-place pile at the bottom of the foundation pit by using equipment such as a total station and the like; a supporting sleeve is arranged at the positioning position to support the upper part of the cast-in-place pile;
s4, driving the drill rod and the drill bit to drill at the positioning position through the pile driver to form a pouring hole, driving the limiting mechanism on the reinforcement cage to be inserted into the marine phase soft soil on the peripheral side of the pouring hole to prevent the reinforcement cage from floating upwards and sinking during pouring, and then pouring concrete into the pouring hole to form the mixing pile;
s5, paving a bidirectional reinforcing mesh in the foundation pit, pouring concrete into the foundation pit, and connecting all cast-in-place piles into a whole after the concrete is formed, so that the construction of the marine soft soil foundation structure is completed.
By the technical scheme, the sea-phase soft soil is compacted, so that guarantee can be provided for excavation of the foundation pit; the anchor rods improve the stability of the foundation pit; support the sleeve and improved the stability when filling hole pore-forming, and stop gear has reduced the steel reinforcement cage when pouring concrete in the filling hole and has taken place the possibility that come-up and sink, and this intensity after having improved the bored concrete pile shaping, and then has improved the intensity of whole foundation structure. In addition, the bidirectional reinforcing mesh improves the strength of the foundation pit after forming.
The invention is further configured to: in the step S4, the positioning mechanism on the reinforcement cage is adjusted before the reinforcement cage is placed, so as to position the reinforcement cage in the process of placing the reinforcement cage into the pouring hole.
Through above-mentioned technical scheme, positioning mechanism has guaranteed inserting to predetermineeing the position that the steel reinforcement cage can be accurate to guarantee that stop gear can be fine insert the marine facies weak soil of pouring hole week side.
The invention is further configured to: in step S5, during the laying process of the bidirectional reinforcing mesh, the bidirectional reinforcing mesh is connected to the portion of each steel reinforcement cage from which the vertical bars extend out of the cast-in-place pile.
Through above-mentioned technical scheme, the operator can use the bundle silk to carry out the ligature with the two-way reinforcing bar net in the vertical muscle of steel reinforcement cage and the foundation ditch to improve the foundation ditch shaping back and the joint strength between the bored concrete pile.
The invention is further configured to: step S2 stop gear includes that two expand the board outward and will two expand the pipe respectively and support into the subassembly that extrapolates in the marine soft soil of pouring hole week side, two expand the board outward and all be located same on the stirrup of steel reinforcement cage and be parallel to each other, one side of steel reinforcement cage is equipped with and supplies one of them expand the gliding first sleeve of board cooperation outward, the opposite side of steel reinforcement cage is equipped with and supplies another expand the gliding second sleeve of board cooperation outward.
Through the technical scheme, the outward pushing mechanism can push the two outward expansion plates so that the two outward expansion plates are respectively inserted into the marine soft soil on the peripheral side of the pouring hole; when concrete is poured into the pouring hole, the two outer expansion plates can be matched with each other to limit the steel reinforcement cage, so that the possibility of floating and sinking of the steel reinforcement cage is reduced; meanwhile, after the cast-in-place pile is formed, the outer expansion plate is partially fixed in the cast-in-place pile, and partially fixed in the marine soft soil, so that the connection strength between the cast-in-place pile and the marine soft soil on the peripheral side is improved.
The invention is further configured to: the extrapolation subassembly includes gear and transfer line, the gear is located two expand between the board outward, two expand the board one side that is close to each other outward and all be equipped with the confession along self length direction one side male slot of gear, and two all be equipped with in the slot with the rack of the teeth of a cogwheel looks meshing of gear, transfer line and the coaxial setting of gear, the transfer line drives the gear revolve, the transfer line is kept away from the one end of gear extends to the top of filling the hole.
Through the technical scheme, an operator can drive the gear to rotate by rotating the transmission rod, so that the two outer expansion plates are driven to be respectively inserted into the marine soft soil on the two sides of the pouring hole until the two outer expansion plates are separated from the gear, and the two outer expansion plates can well limit the reinforcement cage so as to prevent the reinforcement cage from floating upwards and sinking when concrete is poured; and after the two outward-expanding plates are separated from the gear, an operator can take the transmission rod and the gear out of the pouring hole, so that the gear and the transmission rod are recycled.
The invention is further configured to: limiting blocks are arranged on one side, back to the gear, of the first sleeve and one side, back to the gear, of the second sleeve, limiting holes for the limiting blocks to fit through are formed in the side wall of the first sleeve and the side wall of the second sleeve, the limiting holes correspond to the limiting blocks in a one-to-one mode, limiting grooves for the limiting blocks to fit into are formed in one sides, back to the gear, of the two outer expansion plates, and the limiting grooves correspond to the limiting blocks in a one-to-one mode;
the first sleeve and the second sleeve are both provided with double torsion springs, two ends of one double torsion spring are fixed on the first sleeve, and two ends of the other double torsion spring are fixed on the second sleeve; the two limiting blocks are provided with abutting grooves for abutting against the connecting arms of the double torsion springs on one sides back to the gear, and the abutting grooves correspond to the double torsion springs one by one;
when the gears are separated from the two slots, the limiting grooves move to be aligned with the limiting holes one by one, and the connecting arms of the double torsion springs abut the corresponding limiting blocks into the limiting grooves.
Through the technical scheme, the abutting groove reduces the possibility that the connecting arm of the double torsion spring is separated from the limiting block, so that the double torsion spring can stably abut against the limiting block; when the reinforcement cage is placed in the pouring hole, the limiting block is abutted in the limiting hole by the double torsion springs; when the gear orders about outer board removal that expands when board and gear separation, the spacing groove just in time with spacing hole one-to-one to two torsional springs alright support the spacing inslot of going into with the stopper that corresponds, with the removal of the board that expands outward in the restriction, expand the board just so can be stable outward from this and carry on spacingly to the steel reinforcement cage.
The invention is further configured to: first positioning grooves which are perpendicular to and communicated with the limiting holes are formed in the first sleeve and the second sleeve, the first positioning grooves correspond to the limiting holes one to one, a first sliding block is arranged in the first positioning grooves in a sliding mode, positioning springs are further installed in the first positioning grooves, the first sliding blocks are connected with the groove walls of the first positioning grooves through the positioning springs, second positioning grooves into which the first sliding blocks are inserted in a matched mode are formed in the limiting blocks, and one side, back to the outward expansion plate, of each first sliding block is a cambered surface;
when the limiting block abuts against the outer expansion plate, the positioning spring pushes the first sliding block to be inserted into the second positioning groove.
Through the technical scheme, when the reinforcement cage is placed in the pouring hole, the first sliding block is partially positioned in the second positioning groove and partially positioned in the first positioning groove, so that the possibility of separation of the limiting block from the limiting hole can be reduced; when expanding board and gear outward and breaking away from, a pair of right time in spacing groove and spacing hole, because first slider dorsad expand the structure of one side cambered surface of board outward, so two torsional springs can promote the stopper in order to support into first locating groove with slider a whole, the stopper alright support into spacing inslot simultaneously to expand the board outward and carry on spacingly.
The invention is further configured to: the positioning mechanism comprises a positioning ring, a plurality of positioning plates, a plurality of first adjusting rods and a plurality of second adjusting rods;
the positioning ring is sleeved on the outer side of the reinforcement cage and located at the lower part of the reinforcement cage, the first adjusting rods are arranged around the positioning ring, one end of each first adjusting rod is hinged to the positioning ring, one ends of the first adjusting rods, far away from the positioning ring, are hinged to one ends of the second adjusting rods in a one-to-one correspondence mode, the positioning plates are connected to the hinged positions of the first adjusting rods and the corresponding second adjusting rods in a one-to-one correspondence mode, the second adjusting rods are arranged around the stirrups of the same reinforcement cage, and one ends of the second adjusting rods, far away from the first adjusting rods, are hinged to the stirrups of the reinforcement cage;
be equipped with on the steel reinforcement cage and be used for right the locating component that the holding ring advances line location, locating component fixes on the steel reinforcement cage, locating component still with the holding ring is connected.
Through the technical scheme, the operator is putting into the in-process of filling the hole with steel reinforcement cage, through removing the holding ring, the position of adjustable each locating plate, when the holding ring orders about each locating plate simultaneously with the marine soft soil of bored concrete pile week side laminating, fix the holding ring through locating component, so that each locating plate mutually supports and fixes a position steel reinforcement cage, from this steel reinforcement cage is just difficult for taking place the skew putting into the in-process of filling the hole, thereby can be with stable transferring to preset the position of steel reinforcement cage.
The invention is further configured to: the positioning assembly comprises a positioning rod, a second sliding block and a positioning screw rod;
the locating lever is connected along vertical direction the outside of steel reinforcement cage just is located stop gear's below, the locating lever dorsad one side of steel reinforcement cage has the confession along vertical direction the gliding spout of second slider cooperation, the second slider is in slide in the spout, the holding ring is fixed on the second slider, the bottom of locating lever is equipped with the connecting block, have on the connecting block with positioning screw matched with screw hole, the positioning screw thread runs through second slider piece just is adjusted well the screw hole.
Through above-mentioned technical scheme, just can drive reciprocating of holding ring through the second slider that slides, when the holding ring orders about each locating plate simultaneously with the marine soft soil of bored concrete pile week side with the laminating, through rotating the positioning screw with second slider threaded connection to order about screw hole threaded connection on positioning screw and the connecting block, alright fix the holding ring, thereby each locating plate just can be stable fix a position the steel reinforcement cage.
The invention is further configured to: the limiting mechanism in the step S2 comprises a connecting rib, a connecting core and a plurality of external expansion ribs;
the splice bar wears to locate along vertical direction in the steel reinforcement cage and with the coaxial setting of steel reinforcement cage, the upper portion threaded connection of splice bar has the lantern ring, the lantern ring is equipped with a plurality of connecting rods along the periphery, and a plurality of connecting rods are same around locating the stirrup of steel reinforcement cage, each connecting rod is kept away from the one end of the lantern ring is all connected this on the stirrup of steel reinforcement cage, the connecting core cover is established the lower part of splice bar, just the connecting core with the connecting rib rotates to be connected, and is a plurality of expand the muscle outward around locating the connecting core, each the one end that expands the muscle outward is all connected on the connecting core, it is a plurality of the length that expands the muscle outward all is greater than the radius of filling hole.
Through the technical scheme, when the reinforcement cage is placed in the pouring hole, one sides of the external expansion ribs, which are far away from the connecting core, extend upwards in an inclined mode and abut against stirrups of the same reinforcement cage; after the reinforcement cage is placed to the preset position, the connecting rib is rotated to drive the connecting core to move upwards, so that the outer expansion rib can be driven to move upwards, and the outer expansion rib is abutted with the stirrup of the reinforcement cage in the process of moving upwards, so that the stirrup of the reinforcement cage can abut the outer expansion rib to the marine soft soil inserted into the peripheral side of the filling hole; when outer expanding muscle is in the horizontality, the stop rotation expands the muscle outward, and the degree of depth that outer expanding muscle inserted sea phase soft soil this moment is deepest to outer expanding muscle alright carry on spacingly with fine when concreting the steel reinforcement cage, with the come-up and the sinking that prevent the steel reinforcement cage.
In conclusion, the invention has the following beneficial effects:
1. the limiting mechanism reduces the possibility that the reinforcement cage floats upwards and sinks when concrete is poured into the pouring hole, so that the strength of the formed pouring pile is improved, and the strength of the whole foundation structure is further improved;
2. the positioning mechanism ensures that the reinforcement cage can be accurately inserted to a preset position, so that the limiting mechanism can be well inserted into the marine soft soil around the pouring hole;
3. an operator binds the vertical bars of the reinforcement cage with the bidirectional reinforcing mesh in the foundation pit through the binding wires so as to improve the connection strength between the foundation pit and the cast-in-place pile after the foundation pit is formed.
Drawings
Fig. 1 is a schematic view of the construction stage of the foundation structure in this embodiment.
Fig. 2 is a cross-sectional view of the reinforcement cage of this embodiment as it is placed in the perfusion orifice.
Fig. 3 is a sectional view of the positioning mechanism in this embodiment.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is a cross-sectional view of the stop mechanism of this embodiment as it enters the reinforcement cage.
Fig. 6 is a sectional view of the stopper mechanism of the present embodiment at the time of stopper.
Fig. 7 is an enlarged view of a portion B in fig. 5.
Fig. 8 is an enlarged view of a portion C in fig. 6.
Fig. 9 is a cross-sectional view of another stop mechanism of this embodiment shown in place in the pour hole.
Fig. 10 is a sectional view of another stopper mechanism according to the present embodiment.
Fig. 11 is a schematic view of the bidirectional mesh reinforcement of this embodiment.
Fig. 12 is an enlarged view of a portion D in fig. 11.
Reference numerals: 1. a foundation pit; 2. a support sleeve; 3. a perfusion hole; 4. a reinforcement cage; 41. hooping; 42. erecting ribs; 5. a limiting mechanism; 51. an outward expansion plate; 52. an extrapolation component; 521. a gear; 522. a transmission rod; 53. connecting ribs; 54. a connecting core; 55. expanding the ribs outwards; 6. a positioning mechanism; 61. a positioning ring; 62. positioning a plate; 63. a first adjusting lever; 64. a second adjusting lever; 7. a first sleeve; 8. a second sleeve; 9. a slot; 10. a rack; 11. a limiting block; 12. a limiting hole; 13. a limiting groove; 14. a double torsion spring; 15. a butt joint groove; 16. a first positioning groove; 17. a first slider; 18. a positioning spring; 19. a second positioning groove; 20. a cambered surface; 21. a positioning assembly; 211. positioning a rod; 212. a second slider; 213. positioning a screw rod; 22. a chute; 23. connecting blocks; 24. a threaded hole; 25. a collar; 26. a connecting rod; 27. a bidirectional reinforcing mesh; 28. bundling the wires; 29. and (4) the ground.
Detailed Description
The present invention is described in further detail below with reference to figures 1-12.
Example (b): a construction method of a marine soft soil foundation structure refers to fig. 1, a constructor firstly compacts marine soft soil through equipment such as a road roller and the like to form a ground 29 with a hard soil body, then excavates a foundation pit 1 on the compacted soft soil, and the compacted marine soft soil provides guarantee for excavation of the foundation pit 1; and meanwhile, anchor rods are arranged on the peripheral side of the foundation pit 1, so that the stability of the foundation pit 1 is further improved.
Referring to fig. 1, a constructor uses a total station instrument or other equipment to position the pile positions of a cast-in-place pile on the ground 29 in a foundation pit 1, so as to ensure that the intervals among the pile positions are uniform, and thus the overall strength of the foundation structure after casting is uniform. After the positioning is completed, constructors respectively set supporting sleeves 2 at all the positioning positions to support the upper part of the cast-in-place pile, and then drive a drill rod and a drill bit to drill holes at all the positioning positions through a pile machine so as to form matrix-shaped arranged cast-in-place holes 3.
Referring to fig. 2 and 3, constructor places steel reinforcement cage 4 in to each pouring hole 3, is provided with positioning mechanism 6 and locating component 21 on the steel reinforcement cage 4, is placing steel reinforcement cage 4's in-process, fixes a position in order to fix steel reinforcement cage 4 through adjusting positioning mechanism 6 to fix positioning mechanism 6 through adjusting locating component 21, so that steel reinforcement cage 4 can be accurate transfer to preset the position.
Referring to fig. 2, the reinforcement cage 4 is composed of a plurality of stirrups 41 and a plurality of vertical bars 42, the plurality of stirrups 41 are evenly arranged along the vertical direction interval, and the plurality of vertical bars 42 are arranged around the periphery of the inside of the interval that the plurality of stirrups 41 enclose and are welded with the stirrups 41.
Referring to fig. 3 and 4, the positioning mechanism 6 includes a positioning ring 61, a plurality of positioning plates 62, a plurality of first adjusting rods 63 and a plurality of second adjusting rods 64; the positioning assembly 21 comprises a positioning rod 211, a second sliding block 212 and a positioning screw rod 213; after steel reinforcement cage 4 inserts pouring hole 3, positioning mechanism 6 and locating component 21 all are in steel reinforcement cage 4's outside and are located steel reinforcement cage 4 and are close to one side of pouring hole 3 diapire.
The locating lever 211 is welded in the outside of steel reinforcement cage 4 along vertical direction, and the spout 22 has been seted up along vertical direction to one side that steel reinforcement cage 4 was kept away from to locating lever 211, and second slider 212 slides in spout 22, and the coaxial cover of holding ring 61 is established in the steel reinforcement cage 4 outside and is welded with second slider 212 to can drive reciprocating of holding ring 61 through sliding second slider 212 from top to bottom.
The second adjusting rods 64 are arranged around the same stirrup 41, the stirrup 41 is positioned above the positioning ring 61, and one ends of the second adjusting rods 64 are hinged with the stirrup 41; the plurality of second adjusting rods 64 are arranged around the positioning ring 61, one ends of the plurality of second adjusting rods 64 are hinged to the positioning ring 61, the other ends of the plurality of second adjusting rods 64 are hinged to one ends, far away from the stirrups 41, of the plurality of first adjusting rods 63 in a one-to-one correspondence manner, and the positioning plates 62 are fixed at the hinged positions of the second adjusting rods 64 and the corresponding first adjusting rods 63 in a one-to-one correspondence manner; therefore, the positioning ring 61 can adjust the positions of all the positioning plates 62 at the same time when moving.
The positioning screw 213 penetrates through the second sliding block 212 along a vertical direction thread, the connecting block 23 is welded at the bottom of one side, away from the reinforcement cage 4, of the positioning rod 211, and a threaded hole 24 aligned and matched with the positioning screw 213 is formed in the connecting block 23; when a constructor puts down the reinforcement cage 4, the positioning ring 61 is driven to move by sliding the second sliding block 212, so that each positioning plate 62 can be driven to abut against the marine soft soil on the peripheral side of the pouring hole 3 at the same time, and then the positioning screw rod 213 is rotated until the positioning screw rod 213 is in threaded connection with the threaded hole 24, so that the positioning ring 61 can be fixed; from this steel reinforcement cage 4 alright keep with the vertical inserting in the filling hole 3 of the coaxial state in filling hole 3 to with stable the transferring to preset the position of steel reinforcement cage 4.
Referring to fig. 5 and 6, limiting mechanism 5 is arranged on reinforcement cage 4, and after the constructor puts reinforcement cage 4 to the preset position, limiting mechanism 5 can be driven to be inserted into the marine soft soil around pouring hole 3 to prevent reinforcement cage 4 from floating or sinking when the cast pile is poured, thereby affecting the forming quality of the cast pile.
Referring to fig. 2 and 5, the limiting mechanism 5 is located above the positioning mechanism 6, and the limiting mechanism 5 includes two outer expanding plates 51 and an outer pushing assembly 52 for pushing the two outer expanding pipes into the marine soft soil around the pouring hole 3; the extrapolation assembly 52 includes a gear 521 and a transmission rod 522.
Referring to fig. 2 and 5, two outward-expanding plates 51 are parallel to each other and located on the same stirrup 41, a first sleeve 7 for the outward-expanding plates 51 to slide in a matching manner is welded on one side of the stirrup 41, a second sleeve 8 for the outward-expanding plates 51 to slide in a matching manner is welded on the other side of the stirrup 41, one of the outward-expanding plates 51 slides in the first sleeve 7, and the other outward-expanding plate 51 slides in the second sleeve 8; the gear 521 is positioned between the two outer expansion plates 51, and the two outer expansion plates 51 are provided with slots 9 for the gear 521 to be inserted in a matching manner along the length direction of one side of the outer expansion plate 51 facing the gear 521, and the two slots 9 are provided with racks 10 engaged with the gear 521; when the reinforcement cage 4 is placed into the pouring hole 3, the gear 521 is simultaneously positioned in the two slots 9 and keeps a state of being meshed with the rack 10, and the transmission rod 522 is coaxially arranged with the gear 521 and is integrally formed with the gear 521;
referring to fig. 3 and 6, after the reinforcement cage 4 is lowered to the preset position, one end of the transmission rod 522, which is far away from the gear 521, is located above the pouring hole 3; thereby constructor alright drive gear 521 through rotating transfer line 522 and rotate, and then order about two and expand the board 51 respectively and insert the marine facies weak soil of 3 both sides in the filling hole, when gear 521 changes to and two expand the board 51 and break away from outward, two expand the board 51 just can the deepest marine facies weak soil of 3 both sides in the insertion filling hole of ability, thereby can carry on spacingly to steel reinforcement cage 4, prevent that the steel reinforcement cage 4 from appearing the come-up or sinking when concreting, guaranteed the shaping intensity of bored concrete pile from this.
And after the gear 521 is separated from the two outward-expanding plates 51, an operator can take the transmission rod 522 and the gear 521 out of the pouring hole 3, so that the utilization rate of materials is improved, and the gear 521 and the transmission rod 522 are recycled.
Referring to fig. 5 and 7, both sides of the first sleeve 7, which are away from the gear 521, and both sides of the second sleeve 8, which are away from the gear 521, are provided with limiting holes 12, limiting blocks 11 are inserted in the two limiting holes 12, the first sleeve 7 and the second sleeve 8 are provided with double torsion springs 14, both ends of one of the double torsion springs 14 are fixed on the first sleeve 7, and both ends of the other double torsion spring 14 are fixed on the second sleeve 8; the two double torsion springs 14 and the two limit blocks 11 are arranged in a one-to-one correspondence manner, and one side of each limit block 11, which is far away from the outward expansion plate 51, is provided with an abutting groove 15 for abutting against a connecting arm of the corresponding double torsion spring 14; when the reinforcement cage 4 is placed into the pouring hole 3, the connecting arms of the double torsion springs 14 abut against the corresponding abutting grooves 15 to abut the limiting blocks 11 against the outward expansion plate 51.
Referring to fig. 5 and 7, meanwhile, a first positioning groove 16 perpendicular to and communicated with the limiting hole 12 is formed in each of the first sleeve 7 and the second sleeve 8, a first sliding block 17 is slidably arranged in the first positioning groove 16, a positioning spring 18 is installed on one side, away from the limiting block 11, of the first sliding block 17, the first sliding block 17 is connected to the groove wall of the first positioning groove 16 through the positioning spring 18, and a second positioning groove 19 matched with the first sliding block 17 is formed in the limiting block 11; when the stop block 11 abuts on the outward expansion plate 51, the positioning spring 18 pushes the first slide block 17 to be inserted into the second positioning slot 19, so that the possibility that the stop block 11 is separated from the stop hole 12 can be reduced.
Referring to fig. 6 and 8, two expand outward board 51 and all be equipped with on the board and supply stopper 11 cooperation male spacing groove 13, when gear 521 changes to expand outward board 51 with two and separate, two expand outward board 51 respectively move to spacing groove 13 and spacing hole 12 and align one by one, and the one side that first slider 17 expands outward board 51 is cambered surface 20, thereby the linking arm of two torsional springs 14 alright promote stopper 11 and support first slider 17 into first locating groove 16, stopper 11 is supported by the linking arm of two torsional springs 14 to insert corresponding spacing groove 13 simultaneously, in order to expand outward board 51 spacing, this has reduced the possibility that expand outward board 51 breaks away from marine soft soil, expand outward board 51 just can be stable carry on spacingly to steel reinforcement cage 4 from this.
Referring to fig. 9 and 10, another limiting mechanism 5 can be used in the reinforcement cage 4, the limiting mechanism 5 is also disposed above the positioning mechanism 6, and the limiting mechanism 5 includes a connecting rib 53, a connecting core 54, and a plurality of outer expansion ribs 55.
Connecting rib 53 and the coaxial setting of steel reinforcement cage 4 and lie in steel reinforcement cage 4, the cover is equipped with the lantern ring 25 on connecting rib 53, lantern ring 25 and connecting rib 53 threaded connection, the week side of lantern ring 25 is encircleed and is equipped with a plurality of connecting rods 26, the one end welding of a plurality of connecting rods 26 is on lantern ring 25, the other end welding of a plurality of connecting rods 26 is on same stirrup 41 to can realize reciprocating of connecting rib 53 in steel reinforcement cage 4 through rotating connecting rib 53.
Referring to fig. 9 and 10, the connecting core 54 is rotatably sleeved on the connecting ribs 53, the connecting core 54 is located below the lantern ring 25, the plurality of outer expansion ribs 55 are arranged around the periphery of the connecting core 54, one ends of the plurality of outer expansion ribs 55 are hinged on the connecting core 54, and the lengths of the plurality of outer expansion ribs 55 are all greater than the radius of the pouring hole 3; when the steel reinforcement cage 4 is put into the filling hole 3, one ends of the outer expansion ribs 55 far away from the connecting core 54 are inclined and folded upwards, and the outer expansion ribs 55 are overlapped on the same stirrup 41, so that the steel reinforcement cage 4 can smoothly enter the filling hole 3.
Referring to fig. 9 and 10, after the reinforcement cage 4 is placed at the preset position, the connecting rib 53 is rotated to move the connecting rib 53 upward, so that the connecting core 54 is driven to move upward together, the plurality of outer expanded ribs 55 abut against the hoop 41 above, and the hoop 41 abuts against the plurality of outer expanded ribs 55 to the marine soft soil inserted into the peripheral side of the pouring hole 3; and one ends of the external expansion ribs 55 far away from the connecting core 54 are all conical, which is beneficial to the smooth insertion of the external expansion ribs 55 into the marine soft soil; when outer expansion rib 55 was supported to the horizontality, the degree of depth that outer expansion rib 55 inserted the marine soft soil was deepest this moment, alright stall outer expansion rib 55 to outer expansion rib 55 alright be fine carry on spacingly to steel reinforcement cage 4 when concreting, in order to prevent the come-up and sink of steel reinforcement cage 4.
Referring to fig. 11 and 12, after the constructor inserts the limiting mechanism 5 into the marine soft soil around the pouring hole 3, concrete can be poured into the pouring hole 3, and after the concrete is formed, a pouring pile is formed. Then, a bidirectional reinforcing mesh 27 is laid in the foundation pit 1 to improve the strength of the foundation pit 1 after forming; the transverse bars and the longitudinal bars of the bidirectional reinforcing mesh 27 are bound through the binding wires 28, and meanwhile, the vertical bars 42 extending out of the reinforcement cage 4 above the cast-in-place pile are also bound with the bidirectional reinforcing mesh 27 through the binding wires 28, so that the connection strength between the foundation pit 1 and the cast-in-place pile is improved; and finally, pouring concrete into the foundation pit 1, and connecting all cast-in-place piles into a whole when the concrete is formed, so that the construction of the marine soft soil foundation structure is completed.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A construction method of a marine soft soil foundation structure is characterized by comprising the following steps: the method comprises the following steps:
s1, compacting the marine soft soil through equipment such as a road roller and the like;
s2, excavating a foundation pit (1) on the compacted marine soft soil, and arranging anchor rods on the peripheral side of the foundation pit (1) to support the foundation pit (1);
s3, positioning the pile position of the cast-in-place pile at the bottom of the foundation pit (1) by using equipment such as a total station and the like; a supporting sleeve (2) is arranged at the positioning position to support the upper part of the cast-in-place pile;
s4, driving the drill rod and the drill bit to drill at the positioning position through the pile driver to form a pouring hole (3), driving the limiting mechanism (5) on the reinforcement cage (4) to be inserted into the marine phase soft soil on the peripheral side of the pouring hole (3) to prevent the reinforcement cage (4) from floating upwards and sinking during pouring, and then pouring concrete into the pouring hole (3) to enable the mixing pile to be formed;
s5, paving the bidirectional reinforcing mesh (27) in the foundation pit (1), then pouring concrete into the foundation pit (1), and connecting all the cast-in-place piles into a whole after the concrete is formed, thereby completing the construction of the marine soft soil foundation structure.
2. The construction method of the marine soft soil foundation structure according to claim 1, characterized in that: in the step S4, the positioning mechanism (6) on the reinforcement cage (4) is adjusted before the reinforcement cage (4) is placed, so that the reinforcement cage (4) is positioned in the process of placing the reinforcement cage (4) into the pouring hole (3).
3. The construction method of the marine soft soil foundation structure according to claim 1, characterized in that: in step S5, during the laying process of the bidirectional reinforcing mesh (27), the bidirectional reinforcing mesh (27) is connected to the portion of each steel reinforcement cage (4) from which the vertical bar (42) extends out of the cast-in-place pile.
4. The construction method of the marine soft soil foundation structure according to claim 2, characterized in that: step S2 stop gear (5) include two outer expand board (51) and will two outer expand the pipe respectively and support into extrapolate subassembly (52) in the marine soft soil of filling hole (3) week side, two outer expand board (51) all are located same on stirrup (41) of steel reinforcement cage (4) and be parallel to each other, one side of steel reinforcement cage (4) is equipped with and supplies one of them outer expand board (51) cooperation gliding first sleeve (7), the opposite side of steel reinforcement cage (4) is equipped with and supplies another outer expand board (51) cooperation gliding second sleeve (8).
5. The construction method of the marine soft soil foundation structure according to claim 4, characterized in that: the outward pushing assembly (52) comprises a gear (521) and a transmission rod (522), the gear (521) is located between the two outward expansion plates (51), one side, close to each other, of the two outward expansion plates (51) is provided with a slot (9) for one side of the gear (521) to be inserted into, racks (10) meshed with gear teeth of the gear (521) are arranged in the two slots (9), the transmission rod (522) and the gear (521) are coaxially arranged, the transmission rod (522) drives the gear (521) to rotate, and one end, far away from the gear (521), of the transmission rod (522) extends to the position above the filling hole (3).
6. The construction method of the marine soft soil foundation structure according to claim 5, characterized in that: one side of the first sleeve (7) facing away from the gear (521) and one side of the second sleeve (8) facing away from the gear (521) are both provided with limit blocks (11), the side wall of the first sleeve (7) and the side wall of the second sleeve (8) are both provided with limit holes (12) for the limit blocks (11) to pass through in a matching manner, the limit holes (12) are in one-to-one correspondence with the limit blocks (11), one sides of the two outer expansion plates (51) facing away from the gear (521) are both provided with limit grooves (13) for the limit blocks (11) to be inserted in a matching manner, and the limit grooves (13) are also in one-to-one correspondence with the limit blocks (11);
the first sleeve (7) and the second sleeve (8) are both provided with double torsion springs (14), two ends of one double torsion spring (14) are fixed on the first sleeve (7), and two ends of the other double torsion spring (14) are fixed on the second sleeve (8); one sides of the two limiting blocks (11) back to the gear (521) are respectively provided with a butting groove (15) for butting against a connecting arm of the double torsion springs (14), and the butting grooves (15) correspond to the double torsion springs (14) one by one;
when the gears (521) are separated from the two slots (9), the limiting grooves (13) are moved to be aligned with the limiting holes (12) one by one, and the connecting arms of the double torsion springs (14) enable the corresponding limiting blocks (11) to abut into the limiting grooves (13).
7. The construction method of the marine soft soil foundation structure according to claim 6, characterized in that: first positioning grooves (16) which are perpendicular to and communicated with the limiting holes (12) are formed in the first sleeve (7) and the second sleeve (8), the first positioning grooves (16) correspond to the limiting holes (12) one to one, first sliding blocks (17) are arranged in the first positioning grooves (16) in a sliding mode, positioning springs (18) are further installed in the first positioning grooves (16), the first sliding blocks (17) are connected with the groove walls of the first positioning grooves (16) through the positioning springs (18), second positioning grooves (19) for the first sliding blocks (17) to be inserted in a matched mode are formed in the limiting blocks (11), and cambered surfaces (20) are arranged on the sides, back to the outward expansion plate (51), of the first sliding blocks (17);
when the limiting block (11) abuts against the outward expansion plate (51), the positioning spring (18) pushes the first sliding block (17) to be inserted into the second positioning groove (19).
8. The construction method of the marine soft soil foundation structure according to claim 2, characterized in that: the positioning mechanism (6) comprises a positioning ring (61), a plurality of positioning plates (62), a plurality of first adjusting rods (63) and a plurality of second adjusting rods (64);
the positioning ring (61) is sleeved on the outer side of the steel reinforcement cage (4) and located at the lower portion of the steel reinforcement cage (4), the first adjusting rods (63) are arranged around the positioning ring (61), one end of each first adjusting rod (63) is hinged to the positioning ring (61), one end, far away from the positioning ring (61), of each first adjusting rod (63) is hinged to one end of each second adjusting rod (64) in a one-to-one correspondence mode, the positioning plates (62) are connected to the hinged positions, far away from the first adjusting rods (63) and the corresponding second adjusting rods (64), of each second adjusting rod (64) is arranged around the hoop (41) of the same steel reinforcement cage (4), and one end, far away from the first adjusting rods (63), of each second adjusting rod (64) is hinged to the hoop (41) of the steel reinforcement cage (4);
be equipped with on steel reinforcement cage (4) and be used for right locating ring (61) carry out locating component (21) of fixing a position, locating component (21) are fixed on steel reinforcement cage (4), locating component (21) still with locating ring (61) are connected.
9. The construction method of the marine soft soil foundation structure according to claim 8, characterized in that: the positioning assembly (21) comprises a positioning rod (211), a second sliding block (212) and a positioning screw rod (213);
locating lever (211) are connected along vertical direction the outside of steel reinforcement cage (4) just is located stop gear's (5) below, locating lever (211) dorsad one side of steel reinforcement cage (4) has the confession along vertical direction second slider (212) cooperation gliding spout (22), second slider (212) are in slide in spout (22), holding ring (61) are fixed on second slider (212), the bottom of locating lever (211) is equipped with connecting block (23), have on connecting block (23) with positioning screw (213) matched with screw hole (24), positioning screw (213) screw thread runs through second slider (212) just is adjusted well screw hole (24).
10. The construction method of the marine soft soil foundation structure according to claim 2, characterized in that: the limiting mechanism (5) in the step S2 comprises a connecting rib (53), a connecting core (54) and a plurality of outer expanding ribs (55);
the connecting rib (53) penetrates through the reinforcement cage (4) along the vertical direction and is coaxially arranged with the reinforcement cage (4), the upper part of the connecting rib (53) is in threaded connection with a lantern ring (25), the lantern ring (25) is provided with a plurality of connecting rods (26) along the periphery, the connecting rods (26) are wound on the same stirrup (41) of the reinforcement cage (4), one end of each connecting rod (26) far away from the lantern ring (25) is connected to the stirrup (41) of the reinforcement cage (4), the connecting core (54) is sleeved on the lower part of the connecting rib (53), and the connecting core (54) is rotatably connected with the connecting rib (53), a plurality of outer expansion ribs (55) are wound on the connecting core (54), one ends of the outer expansion ribs (55) are connected to the connecting core (54), and the lengths of the outer expansion ribs (55) are larger than the radius of the filling hole (3).
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| CN202111605388.4A CN114277780B (en) | 2021-12-25 | 2021-12-25 | Construction method of marine soft soil foundation structure |
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