CN114277760B - Mucky soil layer stirring pile reinforcing structure and construction method - Google Patents
Mucky soil layer stirring pile reinforcing structure and construction method Download PDFInfo
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- CN114277760B CN114277760B CN202111605387.XA CN202111605387A CN114277760B CN 114277760 B CN114277760 B CN 114277760B CN 202111605387 A CN202111605387 A CN 202111605387A CN 114277760 B CN114277760 B CN 114277760B
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Abstract
The application relates to a stirring pile reinforcing structure for a mucky soil layer and a construction method, which are applied to the technical field of stirring piles, and comprise a stirring pile body for reinforcing the mucky soil layer, wherein reinforcing ribs are arranged in the stirring pile body for reinforcing the mucky soil layer along the depth direction, and reinforcing mechanisms for improving the connection strength between the stirring pile body and the mucky soil layer on the periphery of the stirring pile body are arranged on the reinforcing ribs; the reinforcing mechanism comprises a connecting core and a plurality of outer expansion ribs, the connecting core is sleeved on the reinforcing ribs, the outer expansion ribs are hinged to the periphery of the connecting core at intervals, and the reinforcing ribs are provided with outer supporting mechanisms for supporting the outer expansion ribs into the mucky soil layer on the periphery of the stirring pile body. The application has the effect of enabling the connection between the stirring pile and the surrounding mucky soil layer to be more compact, and further improving the connection strength between the stirring pile and the surrounding mucky soil layer.
Description
Technical Field
The application relates to the technical field of stirring piles, in particular to a reinforced structure of a mucky soil layer stirring pile and a construction method.
Background
The stirring pile is one method of reinforcing saturated soft clay foundation with cement as curing agent, and through special stirring machine, soft soil and curing agent are stirred to form high quality foundation with high integrity, high water stability and high strength.
In the related art, when a mucky soil layer is constructed, a constructor firstly positions, centers and levels a stirring pile machine; then starting the stirring pile machine, so that the stirring head drills holes on the mucky soil layer, and simultaneously controlling the drill rod to drive the stirring head to sink; and in the process of drilling, cement slurry is sent to a slurry outlet of the stirring head through the slurry pump, so that the stirring head is used for pouring while stirring, after the stirring head is submerged to the designed depth, the stirring head is controlled to stir and lift, and the stirring is repeated to be submerged and lifted for a plurality of times, so that the slurry and the mucky soil layer are fully mixed, and the stirring pile can be more firmly molded.
With respect to the related art as described above, the inventors consider that cement slurry only ensures the structural strength of the mixing pile itself, but the mixing pile is not tightly connected to the surrounding layer of mucky soil, which makes the strength of the connection with the surrounding layer of mucky soil after the mixing pile is formed not high.
Disclosure of Invention
In order to solve the problem that the connection strength between the formed stirring pile and the surrounding mucky soil layer is not high, the application provides a reinforcing structure of the mucky soil layer stirring pile and a construction method.
In a first aspect, the application provides a reinforced structure of a mucky soil layer stirring pile, which adopts the following technical scheme:
the utility model provides a mucky soil layer stirring stake reinforced structure, includes the stirring stake body that is used for consolidating the mucky soil layer, is equipped with the strengthening rib along the depthwise in the stirring stake body that is used for consolidating the mucky soil layer, be equipped with the strengthening mechanism that is used for improving the joint strength between the mucky soil layer of stirring stake body and stirring stake body week side on the strengthening rib; the reinforcing mechanism comprises a connecting core and a plurality of outer expansion ribs, the connecting core is sleeved on the reinforcing ribs, the outer expansion ribs are hinged to the periphery of the connecting core at intervals, and the reinforcing ribs are provided with outer supporting mechanisms for supporting the outer expansion ribs into the mucky soil layer on the periphery of the stirring pile body.
By adopting the technical scheme, the structure that the outer expansion ribs are hinged with the connecting core ensures that one end of the outer expansion ribs, which is far away from the connecting core, can be folded towards an inclined upward direction in the process of inserting the reinforcing ribs into the stirring pile body, thereby reducing the resistance when the reinforcing ribs are inserted into the stirring pile body; after the reinforcing ribs are inserted into the preset positions, the outer expanding ribs are propped against the muddy soil layer inserted into the periphery of the stirring pile body through the outer supporting mechanism, so that the outer expanding ribs are positioned in the stirring pile body partially and positioned in the muddy soil layer around the stirring pile body partially; therefore, after the stirring pile is formed, the stirring pile can be tightly connected with the surrounding mucky soil layers, and the connection strength of the formed stirring pile and the surrounding mucky soil layers is improved.
Optionally, the outer support mechanism comprises sleeve and butt ring, the sleeve slip cap is established on the strengthening rib and be located the top of connecting the core, the butt ring is connected the bottom of sleeve, a plurality of outer expansion muscle distributes the week side of butt ring.
Through adopting above-mentioned technical scheme, after strengthening rib and sleeve insert to preset position, through the upward movement strengthening rib for the butt ring butt of outer expanding rib and sleeve bottom, thereby the butt ring alright strut outer expanding rib to insert stirring stake body week side's mucky soil in situ.
Optionally, a blocking ring is sleeved below the connecting core on the reinforcing rib, the blocking ring is attached to the connecting core, and the outer diameter of the blocking ring is larger than that of the connecting core.
By adopting the technical scheme, in the process of moving up the reinforcing ribs, the outer expansion ribs can be gradually expanded to be in a horizontal state by the abutting ring, and at the moment, the outer expansion ribs are inserted into the muddy soil layer at the periphery of the stirring pile body to be the deepest, so that the connecting effect is best; through the blocking effect of blocking ring, can carry out spacingly to the outer muscle that expands that changes to the horizontality to reduce and consolidate the excessive upward movement of muscle, lead to outer one end downward sloping that the muscle kept away from the connection core of expanding, and then influence the possibility of the connection effect of outer muscle.
Optionally, a conical tip is arranged at one end of the outer expansion rib far away from the connecting core, and a connecting assembly is arranged between two adjacent outer expansion ribs; the connecting assembly comprises two connecting ribs which are hinged with each other, wherein one connecting rib is hinged with one outer expanding rib, and the other connecting rib is hinged with the other outer expanding rib; when the outer expanded ribs are folded towards the direction of the reinforcing ribs, the two connecting ribs are also in a folded state; when a plurality of outer expansion ribs are spread in the direction away from the reinforcing ribs and are propped into the mucky soil layer at the periphery of the stirring pile body, the two connecting ribs are also in a spread state.
By adopting the technical scheme, the cone tip can enable the external expansion ribs to be more easily inserted into the mucky soil layer at the periphery of the stirring pile body; and the external expansion ribs also drive the connecting ribs to be inserted together in the process of inserting the mucky soil layer, and the connecting ribs connect all the external expansion ribs inserted into the mucky soil layer into a whole, so that the connection strength between the molded stirring pile and the mucky soil layer is further improved.
Optionally, a positioning core is sleeved on the sleeve, a plurality of positioning ribs are hinged around the circumferential side of the positioning core, a positioning sheet is hinged at one end, far away from the positioning core, of each positioning rib, and a first positioning cylinder is sleeved on each positioning rib in a sliding manner; a second positioning cylinder is sleeved on the sleeve above the positioning core in a sliding manner, positioning rods are connected between the second positioning cylinder and each first positioning cylinder, one end of each positioning rod is hinged to each first positioning cylinder, and the other end of each positioning rod is hinged to each second positioning cylinder; the sleeve is also connected with a third positioning cylinder in a threaded manner, and the outer peripheral wall of the third positioning cylinder is connected with the inner peripheral wall of the second positioning cylinder in a threaded manner.
By adopting the technical scheme, the second positioning cylinder is slid to drive the positioning rod to pull the first positioning cylinder so as to adjust the inclination of the positioning ribs, so that a plurality of positioning sheets are simultaneously attached to the inner wall of the stirring pile body, and then the third positioning cylinder is rotated to be in threaded connection with the second positioning cylinder, so that the second positioning cylinder is fixed; thereby improving the perpendicularity of the reinforcing ribs and the sleeve.
Optionally, the upper end of the sleeve is detachably connected with a first limiting block, the first limiting block is lapped on the ground on the periphery of the stirring pile body for reinforcing the mucky soil layer, and a demoulding layer is arranged on the bottom wall of the first limiting block; the upper end of strengthening rib can be dismantled and be connected with the second stopper, the size of second stopper is greater than telescopic pipe diameter, the second stopper is located the top of first stopper.
By adopting the technical scheme, the first limiting block and the second limiting block are mutually matched, so that the possibility that the reinforcing ribs and the sleeve sink into the stirring pile body is reduced, and the outer expanding ribs can be conveniently adjusted by constructors; the first limiting block and the second limiting block are detachably connected, so that after the stirring pile is formed, constructors can detach the first limiting block and the second limiting block respectively for reuse, and the utilization rate of materials is improved; meanwhile, the possibility that the first limiting block is adhered to the molded stirring pile is reduced by the demolding layer, and the first limiting block is removed.
Optionally, the opposite both sides on the second stopper horizontal direction all are equipped with the supporting shoe, two the supporting shoe all is located the upper portion of second stopper, have two standing grooves on the first stopper, one of them the standing groove is located the second stopper is towards one the one side of supporting shoe, another the standing groove is located the second stopper is towards another one side of supporting shoe, be equipped with the bracing piece in the standing groove, the one end of bracing piece articulates on the cell wall of standing groove, the other end butt of bracing piece is in on the supporting shoe.
By adopting the technical scheme, the two supporting blocks are respectively positioned on two opposite sides of the second limiting block, so that constructors can conveniently and simultaneously stably lift the second limiting block by using tools such as jacks and the like under the two supporting blocks to drive the external expanding bars to be stably inserted into the mucky soil layer on the periphery of the stirring pile body; and after the second stopper lifts to predetermineeing the position, the accessible rotates bracing piece to bracing piece butt in the bottom of supporting shoe to spacing the supporting shoe, thereby reduced stirring stake body solidification in-process and appear strengthening rib subsides, and then lead to outer expanding rib to take place the skew and influence stirring stake after the shaping and the possibility of the joint strength on mucky soil layer.
Optionally, positioning components for positioning the support rods are arranged on the two support blocks; the positioning assembly comprises a positioning block and a positioning spring, a positioning groove is formed in the bottom wall of the supporting block, the positioning block slides in the positioning groove, the positioning spring is located in the positioning groove, one end of the positioning spring is connected to the groove wall of the positioning groove, the other end of the positioning spring is connected to the positioning block, the positioning spring pushes out part of the positioning block out of the positioning groove, and one side, opposite to the second limiting block, of the part, extending out of the positioning block, of the positioning block is an inclined surface.
By adopting the technical scheme, in the process that constructors rotate the support rods to be abutted against the bottoms of the support blocks, the support rods can push the positioning blocks into the positioning grooves; when the bracing piece butt is in the bottom of supporting shoe, the locating piece is released the constant head tank by the locating spring and is laminated on the lateral wall of bracing piece to can carry out spacingly to the bracing piece, this supporting stability who has improved the bracing piece.
Optionally, be equipped with a plurality of reinforcement screw on the first stopper, reinforcement screw passes first stopper and extend into the mucky soil layer, still have the pouring hole on the first stopper.
By adopting the technical scheme, the reinforcing screw enables the first limiting block to be stably connected with the ground on the periphery of the stirring pile body, so that the fixing stability of the sleeve is improved; therefore, when constructors lift the reinforcing ribs, the abutting ring at the bottom of the sleeve can stably abut the outer expanding ribs into the mucky soil layer inserted into the periphery of the stirring pile body; and the in-process that the external expansion rib inserted the muddy soil layer of stirring stake body week side can lead to stirring stake body top layer to take place to subside, through pouring the cement paste to pouring the downthehole alright timely to the top layer of stirring stake body, make the shaping that stirring stake body can be stable.
In a second aspect, the application also provides a construction method of the reinforced structure of the mucky soil layer stirring pile, which adopts the following technical scheme:
the construction method of the reinforced structure of the mucky soil layer mixing pile comprises the following steps:
s1: positioning, centering and leveling the stirring pile machine by constructors; then starting the stirring pile machine, so that the stirring head drills holes on the mucky soil layer, and simultaneously controlling the drill rod to drive the stirring head to sink; in the drilling process, cement slurry is sent to a slurry outlet of the stirring head through a slurry pump, so that the stirring head performs pouring while stirring;
s2: after the cement paste and the mucky soil layer are fully mixed by the stirring pile machine, before the cement paste is not solidified, the reinforcing ribs and the sleeve are inserted into the stirring pile body together until the first limiting block is lapped on the ground on the periphery of the stirring pile body, and the second limiting block is lapped on the first limiting block; in the process, the inclination of the positioning ribs is adjusted by adjusting the position of the second positioning cylinder, so that a plurality of positioning sheets are simultaneously attached to the inner wall of the stirring pile body, and the second positioning cylinder is fixed through the third positioning cylinder, so that the perpendicularity of the reinforcing ribs and the sleeve is improved;
s3: fixing the first limiting block through the reinforcing screw, and then using tools such as a jack and the like to push the supporting block upwards, so that the supporting block drives the second limiting block to move upwards, and further drives the reinforcing ribs to move upwards, so that a plurality of outer expanding ribs on the connecting core are abutted with the abutting rings, and the abutting rings abut the outer expanding ribs to the soil layer inserted into the periphery of the stirring pile body;
s4: the supporting rod is rotated to be abutted with the supporting block, cement paste is supplemented into the stirring pile body through the pouring hole, after the cement paste mixed with the mucky soil layer is solidified and molded, the second limiting block and the first limiting block are respectively removed, and reinforcing ribs above the stirring pile body are cut off, so that the stirring pile can be formed.
Through adopting above-mentioned technical scheme, consolidate muscle and sleeve and insert stirring stake body and to predetermine the position after, fix first stopper through reinforcing screw, then make the second stopper drive consolidate muscle and move up together through promoting the second stopper to the butt ring just can support outer expanding muscle to insert stirring stake body week side's mucky soil in-layer, thereby alright improve stirring stake body and mucky soil layer's connection compactness, improved stirring stake shaping back and surrounding mucky soil layer's joint strength from this.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the constructor rotates all the outer expanding ribs upwards, so that one end of the outer expanding ribs, which is far away from the connecting core, is folded towards the inclined upward direction, and the resistance of the reinforcing ribs when the reinforcing ribs are inserted into the stirring pile body is reduced; after the reinforcing ribs are inserted into the preset positions, the outer expanding ribs can be propped against the muddy soil layer inserted into the periphery of the stirring pile body through the outer supporting mechanism; therefore, after the stirring pile is formed, the stirring pile can be tightly connected with the surrounding mucky soil layers, so that the connection strength between the formed stirring pile and the surrounding mucky soil layers is improved;
2. the external expansion ribs also drive the connecting ribs to be inserted together in the process of inserting the mucky soil layer, and the connecting ribs connect all the external expansion ribs inserted into the mucky soil layer into a whole, so that the connection strength between the molded stirring pile and the mucky soil layer is further improved;
3. the second positioning cylinder is slid to drive the positioning rod to pull the first positioning cylinder so as to adjust the inclination of the positioning ribs, so that a plurality of positioning sheets are simultaneously attached to the inner wall of the stirring pile body, and then the third positioning cylinder is rotated to be in threaded connection with the second positioning cylinder, so that the second positioning cylinder is fixed; thereby improving the perpendicularity of the reinforcing ribs and the sleeve.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present application with a reinforcing structure inserted into a mixing pile.
FIG. 2 is a cross-sectional view of a reinforced state of a reinforcing structure in an embodiment of the present application.
FIG. 3 is a cross-sectional view of a positioning assembly in an embodiment of the application.
Reference numerals: 1. a stirring pile body; 2. reinforcing ribs; 3. a reinforcement mechanism; 31. a connecting core; 32. outer expanding ribs; 4. an outer support mechanism; 41. a sleeve; 42. an abutment ring; 5. a blocking ring; 6. a conical tip; 7. a connection assembly; 71. a connecting rib; 8. positioning the core; 9. positioning ribs; 10. a positioning sheet; 11. a first positioning cylinder; 12. a second positioning cylinder; 13. a positioning rod; 14. a third positioning cylinder; 15. a first limiting block; 16. a release layer; 17. a second limiting block; 18. a support block; 19. a placement groove; 20. a support rod; 21. a positioning assembly; 211. a positioning block; 212. a positioning spring; 22. a positioning groove; 23. an inclined plane; 24. reinforcing the screw; 25. and (5) pouring the holes.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a reinforced structure of a stirring pile for a mucky soil layer.
Referring to fig. 1 and 2, a stirring pile reinforcing structure for a mucky soil layer comprises a stirring pile body 1 and reinforcing ribs 2, wherein the stirring pile body 1 is a cylindrical pile body, the reinforcing ribs 2 are provided with reinforcing mechanisms 3 for improving the connection strength between the stirring pile body 1 and the mucky soil layer, each reinforcing mechanism 3 is composed of a connecting core 31 and a plurality of outer expansion ribs 32 which are uniformly hinged on the periphery of the connecting core 31, the connecting core 31 is coaxially sleeved at the lower part of the reinforcing ribs 2 and welded with the reinforcing ribs 2, the lengths of the outer expansion ribs 32 are equal, and the lengths of the outer expansion ribs 32 are larger than the radius of the stirring pile body 1; when the reinforcing ribs 2 are inserted into the mixing pile body 1, one ends of all the outer ribs 32, which are far away from the connecting core 31, are folded in an obliquely upward direction, which can reduce the resistance when the reinforcing ribs 2 are inserted into the mixing pile body 1.
The external bracing mechanism 4 is further arranged above the connecting core 31 on the reinforcing rib 2, and under the action of the external bracing mechanism 4, after the reinforcing rib 2 is inserted into the stirring pile body 1 to a preset position, downward abutting force is applied to all external expansion ribs 32, so that all external expansion ribs 32 are externally expanded into a mucky soil layer inserted into the periphery of the stirring pile body 1, and after the stirring pile body 1 is solidified and molded, the external expansion ribs 32 are partially fixed in the stirring pile body 1 and partially fixed in the mucky soil layer around the stirring pile body 1; so that the stirring pile is closely connected with the surrounding layer of mucky soil, thereby improving the connection strength of the stirring pile with the surrounding layer of mucky soil.
Referring to fig. 1 and 2, the external bracing mechanism 4 comprises a sleeve 41 slidably sleeved on the reinforcing rib 2 and an abutting ring 42 integrally formed at the bottom of the sleeve 41, wherein the abutting ring 42 is a circular ring, and when the reinforcing rib 2 and the sleeve 41 are inserted into the stirring pile body 1 to a preset position, the reinforcing rib 2 is moved upwards to enable the external bracing rib 32 to abut against the abutting ring 42, so that the abutting ring 42 can externally brace the external bracing rib 32 into a mucky soil layer inserted into the periphery side of the stirring pile body 1; the conical tip 6 is integrally formed at one end of the outer expansion rib 32 far away from the connecting core 31, so that the resistance of the outer expansion rib 32 to being inserted into a mucky soil layer is reduced;
meanwhile, a connecting assembly 7 is arranged between two adjacent outer expanding ribs 32, the connecting assembly 7 is composed of two connecting ribs 71 which are hinged with each other, one connecting rib 71 is hinged at one end of one outer expanding rib 32 close to the cone tip 6 of the outer expanding rib, and the other connecting rib 71 is hinged at one end of the other outer expanding rib 32 close to the cone tip 6 of the outer expanding rib; the external expansion ribs 32 drive the connecting ribs 71 to be inserted together in the process of inserting the mucky soil layer, and the parts of all the external expansion ribs 32 positioned in the mucky soil layer are connected into a whole through the connecting ribs 71, so that the connection strength between the molded stirring pile and the mucky soil layer is further improved.
Referring to fig. 2, in addition, still coaxial cover is equipped with on the strengthening rib 2 and blocks ring 5, block ring 5 and strengthening rib 2 welding, block ring 5 and diameter be greater than the diameter of connecting core 31 for circular ring, block ring 5 laminating in the bottom of connecting core 31, because block the effect of ring 5, can block the outer expanding rib 32 that changes to the horizontality, this has reduced strengthening rib 2 excessive upward movement and has led to outer expanding rib 32 to keep away from the one end downward sloping of connecting core 31, from this can guarantee that outer expanding rib 32 is deepest inserts the muddy soil layer of stirring stake body 1 week side, thereby improved the joint strength between stirring stake and the muddy soil layer.
Referring to fig. 1 and 2, coaxial cover is equipped with location core 8 on sleeve 41, the welding of location core 8 is in the middle part of sleeve 41, evenly articulated around the week side of location core 8 has a plurality of length the same location muscle 9, the length of location muscle 9 is greater than the radius of stirring stake body 1, all the slip cap is equipped with first location section of thick bamboo 11 on each location muscle 9, the top slip cap that lies in location core 8 on sleeve 41 is equipped with second location section of thick bamboo 12, all be connected with the locating lever 13 that the length is the same between second location section of thick bamboo 12 and each first location section of thick bamboo 11, all be articulated between locating lever 13 and first location section of thick bamboo 11 and the second location section of thick bamboo 12, one side that each location muscle 9 kept away from sleeve 41 all articulates has spacer 10, still threaded connection has third location section of thick bamboo 14 on the sleeve 41, and also be threaded connection between the outer wall of third location section of thick bamboo 14 and the inner wall of second location section of thick bamboo 12.
In the process of inserting the sleeve 41 into the stirring pile body 1, a constructor can slide the second positioning cylinder 12 upwards so as to drive the positioning rod 13 to pull the first positioning cylinder 11 to synchronously adjust the inclination of all the positioning ribs 9, and simultaneously adjust the positions of the sleeve 41 so that all the positioning sheets 10 are at the same horizontal height and are attached to the inner wall of the stirring pile body 1, and at the moment, the third positioning cylinder 14 is rotated to be in threaded connection with the second positioning cylinder 12, so that the second positioning cylinder 12 is fixed; thereby, the reinforcing ribs 2 and the sleeve 41 can be inserted into the stirring pile body 1 in a state of being coaxial with the stirring pile body 1, and the subsequent external expansion ribs 32 can be well inserted into a mucky soil layer to be laid.
Referring to fig. 1 and 2, a first limiting block 15 is in threaded connection with the top of the sleeve 41, the first limiting block 15 is a circular block, the radius of the first limiting block 15 is larger than that of the stirring pile body 1, a second limiting block 17 is in threaded connection with the top of the reinforcing rib 2, and the second limiting block 17 is also a circular block; the constructor inserts the reinforcing rib 2 and the sleeve 41 into the stirring pile body 1 to the ground of the first limiting block 15 lapped on the periphery of the stirring pile body 1, and the second limiting block 17 lapped on the first limiting block 15, so that the positioning of the reinforcing rib 2 and the sleeve 41 can be realized.
Referring to fig. 1 and 2, two opposite sides of the second limiting block 17 in the horizontal direction are uniformly formed with supporting blocks 18, wherein the two supporting blocks 18 are rectangular blocks, and the two supporting blocks 18 are positioned at the upper part of the second limiting block 17; the construction staff can conveniently and simultaneously use tools such as jacks and the like to stably lift the second limiting block 17 under the two supporting blocks 18 so as to drive the reinforcing ribs 2 to move upwards, and further enable the abutting rings 42 to externally support the outer expanding ribs 32 into the mucky soil layer inserted into the periphery side of the stirring pile body 1; and when sleeve 41 inserts stirring stake body 1 to predetermineeing the position, first stopper 15 is fixed subaerial at stirring stake body 1 week side through a plurality of reinforcing screws 24, this improves sleeve 41 and the fixed stability of butt ring 42 for butt ring 42 can be stable carry out the butt to outer expanding muscle 32.
Referring to fig. 3, the first limiting blocks 15 are respectively located right below the two supporting blocks 18 and are respectively provided with a placing groove 19, a supporting rod 20 is hinged in the placing grooves 19, the supporting rod 20 is hinged at one end of the placing groove 19 close to the second limiting block 17, when a constructor uses tools such as a jack to lift the second limiting block 17 to a preset position, the supporting rod 20 can be rotated to the bottom of the supporting block 18 in a abutting mode, so that the supporting block 18 is limited, and the possibility that the outer expanding rib 32 is offset due to downward movement of the reinforcing rib 2 due to gravity is reduced.
In addition, the bottoms of the two supporting blocks 18 are both provided with positioning assemblies 21, each positioning assembly 21 is composed of a positioning block 211 and a positioning spring 212, a positioning groove 22 is formed on the bottom wall of each supporting block 18 and is positioned right above the corresponding placing groove 19, each positioning block 211 is arranged in each positioning groove 22 in a sliding manner along the vertical direction, one end of each positioning spring 212 is fixed on the groove wall of each positioning groove 22, and the other end of each positioning spring 212 is fixed on each positioning block 211; in the initial state, part of the positioning block 211 extends out of the positioning groove 22, and the part of the positioning block 211 outside the positioning groove 22, which is opposite to the side of the second limiting block 17, is an inclined surface 23; so that the supporting rod 20 can prop the positioning block 211 into the positioning groove 22 in the process of rotating to be propped against the supporting block 18; when the supporting rod 20 rotates to vertically abut against the supporting block 18, the positioning block 211 is pushed out of the positioning groove 22 by the positioning spring 212 and is attached to one side, far away from the second limiting block 17, of the supporting rod 20, and therefore the positioning block 211 can limit the supporting rod 20 so as to ensure that the supporting rod 20 stably supports the supporting block 18.
Referring to fig. 2, the first limiting block 15 is further provided with a pouring hole 25, and after the constructor supports the supporting block 18 through the supporting rod 20, the deposited surface layer in the stirring pile body 1 can be timely supplemented by pouring cement paste into the pouring hole 25, so that the stirring pile body 1 can be well formed; and be equipped with release layer 16 on the diapire of first stopper 15, in this embodiment, release layer 16 is polytetrafluoroethylene board, polytetrafluoroethylene board fixed connection on the diapire of first stopper 15, and polytetrafluoroethylene board has the low and difficult adhesion other material's of coefficient of friction characteristic, consequently, set up release layer 16 and made things convenient for constructor to demolish first stopper 15 after the shaping of stirring stake.
The embodiment of the application also discloses a construction method of the reinforced structure of the mucky soil layer stirring pile, which comprises the following steps:
s1: positioning, centering and leveling the stirring pile machine by constructors; then starting the stirring pile machine, so that the stirring head drills holes on the mucky soil layer, and simultaneously controlling the drill rod to drive the stirring head to sink; in the drilling process, cement slurry is sent to a slurry outlet of a stirring head through a slurry pump, so that the stirring head performs pouring while stirring, and a cylindrical stirring pile body 1 is formed;
s2: after the cement paste and the mucky soil layer are fully mixed by the stirring pile machine, before the cement paste is not solidified, the reinforcing ribs 2 and the sleeve 41 are inserted into the stirring pile body 1 together until the first limiting block 15 is lapped on the ground on the periphery of the stirring pile body 1, and the second limiting block 17 is lapped on the first limiting block 15; in the process, the inclination of all the positioning ribs 9 is synchronously adjusted by sliding the second positioning cylinder 12, and meanwhile, the positions of the sleeves 41 are adjusted, so that all the positioning sheets 10 are at the same horizontal height and are attached to the inner wall of the stirring pile body 1, and then the third positioning cylinder 14 is rotated to be in threaded connection with the second positioning cylinder 12, so that the second positioning cylinder 12 is fixed; thereby, the reinforcing rib 2 and the sleeve 41 can be inserted into the stirring pile body 1 while being kept coaxial with the stirring pile body 1;
s3: the first limiting block 15 is fixed through the reinforcing screw 24, and meanwhile, the second limiting block 17 is stably lifted under the two supporting blocks 18 by means of cooperation of tools such as jacks, so that the two supporting blocks 18 drive the second limiting block 17 to move upwards, and the reinforcing ribs 2 are driven to move upwards, so that a plurality of outer expanding ribs 32 on the connecting core 31 are abutted with the abutting rings 42, and the outer expanding ribs 32 are outwards supported into a mucky soil layer inserted into the periphery side of the stirring pile body 1 by the abutting rings 42;
s4: the supporting rod 20 is rotated to be perpendicular to the supporting block 18 and is abutted against the supporting block 18, water slurry is filled into the stirring pile body 1 through the filling hole 25, after cement slurry mixed with a mucky soil layer in the stirring pile body 1 is solidified and molded, the positioning block 211 is abutted into the positioning groove 22 so as to rotate the supporting rod 20 into the placing groove 19, and then the second limiting block 17 can be rotated so as to detach the second limiting block 17; pulling out the reinforcing screw 24, so that the first limiting block 15 can be rotated to detach the first limiting block 15; finally, the reinforcing ribs 2 above the stirring pile body 1 are cut off, so that the stirring pile can be formed.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The structure for reinforcing a stirring pile for a layer of mucky soil comprises a stirring pile body (1) for reinforcing a layer of mucky soil, which is characterized in that
The method is characterized in that: a reinforcing rib (2) is arranged in the stirring pile body (1) for reinforcing the mucky soil layer along the depth direction, and a reinforcing mechanism (3) for improving the connection strength between the stirring pile body (1) and the mucky soil layer at the periphery of the stirring pile body (1) is arranged on the reinforcing rib (2);
the reinforcing mechanism (3) comprises a connecting core (31) and a plurality of external expansion ribs (32), the connecting core (31) is sleeved on the reinforcing ribs (2), the external expansion ribs (32) are hinged to the periphery of the connecting core (31) at intervals, and the reinforcing ribs (2) are provided with external supporting mechanisms (4) for supporting the external expansion ribs (32) into a muddy soil layer on the periphery of the stirring pile body (1);
the outer support mechanism (4) is composed of a sleeve (41) and an abutting ring (42), the sleeve (41) is sleeved on the reinforcing rib (2) in a sliding mode and is located above the connecting core (31), the abutting ring (42) is connected to the bottom of the sleeve (41), and a plurality of outer expanding ribs (32) are distributed on the periphery side of the abutting ring (42); one end of each outer expansion rib (32) far away from the connecting core (31) is provided with a conical tip (6), and a connecting assembly (7) is arranged between two adjacent outer expansion ribs (32);
the connecting assembly (7) comprises two connecting ribs (71) which are hinged with each other, wherein one connecting rib (71) is hinged with one outer expanding rib (32), and the other connecting rib (71) is hinged with the other outer expanding rib (32); when the outer expansion ribs (32) are folded towards the direction of the reinforcing rib (2), the two connecting ribs (71) are also in a folded state; when the outer expansion ribs (32) are expanded towards the direction away from the reinforcing ribs (2) and are propped into the mucky soil layer at the periphery side of the stirring pile body (1), the two connecting ribs (71) are also in an expanded state;
a positioning core (8) is sleeved on the sleeve (41), a plurality of positioning ribs (9) are hinged around the circumferential side of the positioning core (8), a positioning sheet (10) is hinged at one end, far away from the positioning core (8), of each positioning rib (9), and a first positioning cylinder (11) is sleeved on each positioning rib (9) in a sliding mode; a second positioning cylinder (12) is sleeved on the sleeve (41) above the positioning core (8) in a sliding manner, positioning rods (13) are connected between the second positioning cylinder (12) and each first positioning cylinder (11), one end of each positioning rod (13) is hinged to each first positioning cylinder (11), and the other end of each positioning rod (13) is hinged to each second positioning cylinder (12); a third positioning cylinder (14) is further connected to the sleeve (41) in a threaded manner, and the outer peripheral wall of the third positioning cylinder (14) is connected with the inner peripheral wall of the second positioning cylinder (12) in a threaded manner;
the upper end of the sleeve (41) is detachably connected with a first limiting block (15), the first limiting block (15) is lapped on the ground on the periphery of the stirring pile body (1) for reinforcing the mucky soil layer, and a demoulding layer (16) is arranged on the bottom wall of the first limiting block (15); the upper end of the reinforcing rib (2) is detachably connected with a second limiting block (17), the size of the second limiting block (17) is larger than the pipe diameter of the sleeve (41), and the second limiting block (17) is positioned above the first limiting block (15);
the two opposite sides of the second limiting block (17) in the horizontal direction are respectively provided with a supporting block (18), two supporting blocks (18) are respectively positioned at the upper parts of the second limiting blocks (17), two placing grooves (19) are formed in the first limiting block (15), one placing groove (19) is positioned at one side, facing one supporting block (18), of the second limiting block (17), the other placing groove (19) is positioned at one side, facing the other supporting block (18), of the second limiting block (17), a supporting rod (20) is arranged in each placing groove (19), one end of each supporting rod (20) is hinged to the groove wall of each placing groove (19), and the other end of each supporting rod (20) is abutted to the corresponding supporting block (18);
positioning components (21) for positioning the support rods (20) are arranged on the two support blocks (18);
positioning assembly (21) are including locating piece (211) and positioning spring (212), have constant head tank (22) on the diapire of supporting shoe (18), locating piece (211) slide in constant head tank (22), positioning spring (212) are located in constant head tank (22), just one end of positioning spring (212) is connected on the cell wall of constant head tank (22), the other end of positioning spring (212) is connected on locating piece (211), positioning spring (212) will outside part release constant head tank (22) of locating piece (211), part that locating piece (211) stretches out one side that is opposite to second stopper (17) is inclined plane (23).
2. A mucky soil layer mixing pile reinforcing structure according to claim 1, wherein: the reinforcing rib (2) is arranged below the connecting core (31) in a sleeved mode, the blocking ring (5) is attached to the connecting core (31), and the outer diameter of the blocking ring (5) is larger than that of the connecting core (31).
3. A mucky soil layer mixing pile reinforcing structure according to claim 1, characterized in that: be equipped with a plurality of reinforcement screw (24) on first stopper (15), reinforcement screw (24) pass first stopper (15) and extend into the mucky soil layer, still have on first stopper (15) and pour into hole (25).
4. A method of constructing a reinforced structure for a muddy soil layer mixing pile according to claim 3, characterized in that: the method comprises the following steps:
s1: positioning, centering and leveling the stirring pile machine by constructors; then starting the stirring pile machine, so that the stirring head drills holes on the mucky soil layer, and simultaneously controlling the drill rod to drive the stirring head to sink; in the drilling process, cement slurry is sent to a slurry outlet of the stirring head through a slurry pump, so that the stirring head performs pouring while stirring;
s2: after the cement paste and the mucky soil layer are fully mixed by the stirring pile machine, before the cement paste is not solidified, the reinforcing ribs (2) and the sleeve (41) are inserted into the stirring pile body (1) together until the first limiting block (15) is lapped on the ground on the periphery of the stirring pile body (1), and the second limiting block (17) is lapped on the first limiting block (15); in the process, the inclination of the positioning ribs (9) is adjusted by adjusting the position of the second positioning cylinder (12), so that a plurality of positioning sheets (10) are simultaneously attached to the inner wall of the stirring pile body (1), and the second positioning cylinder (12) is fixed through the third positioning cylinder (14), so that the verticality of the reinforcing ribs (2) and the sleeve (41) is improved;
s3: fixing the first limiting block (15) through the reinforcing screw (24), and then using tools such as a jack to push the supporting block (18) upwards, so that the supporting block (18) drives the second limiting block (17) to move upwards, thereby driving the reinforcing rib (2) to move upwards, enabling a plurality of outer expanding ribs (32) on the connecting core (31) to abut against the abutting ring (42), and the abutting ring (42) abuts against the outer expanding ribs (32) to the soil layer inserted into the periphery of the stirring pile body (1);
s4: the supporting rod (20) is rotated to be abutted with the supporting block (18), cement paste is supplemented into the stirring pile body (1) through the pouring hole (25), after the cement paste mixed with the mucky soil layer is solidified and molded, the second limiting block (17) and the first limiting block (15) are detached respectively, and the reinforcing ribs (2) above the stirring pile body (1) are cut off, so that the stirring pile can be formed.
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