CN117166462B - Rotary drilling pile foundation construction device and method for hard rock combined stratum - Google Patents
Rotary drilling pile foundation construction device and method for hard rock combined stratum Download PDFInfo
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- CN117166462B CN117166462B CN202311154031.8A CN202311154031A CN117166462B CN 117166462 B CN117166462 B CN 117166462B CN 202311154031 A CN202311154031 A CN 202311154031A CN 117166462 B CN117166462 B CN 117166462B
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- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 239000011435 rock Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 238000007142 ring opening reaction Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 14
- 210000001503 joint Anatomy 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 description 2
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- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003032 molecular docking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a rotary drilling pile foundation construction device for combining hard rock with stratum, which comprises a construction platform, wherein a pile foundation opening is formed in the construction platform, a guide beam positioned at the side of the pile foundation opening is arranged at the top of the construction platform, a sliding block is arranged on the guide beam, one side of the sliding block is connected with a stand column in a vertical sliding manner, an inner movable supporting frame and an outer movable limiting frame positioned at one side of the inner movable supporting frame are connected to the top of the stand column in a hanging manner through V-shaped rods, and an inner expansion driving inserted rod is arranged on the inner movable supporting frame. According to the invention, the inner movable supporting frame and the outer movable limiting frame are arranged, so that the butt joint and the connection of the two locking steel pipes are more convenient, and the throwing and the fixing of the slice support are more convenient through arranging the supporting rod and other components. The construction method of the rotary drilling pile foundation combining hard rock with stratum has the advantages that the construction device is used for installing the lock catch steel pipe and the weir crest support, the installation difficulty is greatly reduced, and the sealing and waterproof effects are improved.
Description
Technical Field
The invention relates to the technical field of bridge pile foundation cofferdam construction, in particular to a rotary drilling pile foundation construction device and method for hard rock combined stratum.
Background
When the bridge is constructed, piers (pile foundations) are required to be built on the river bed, cofferdams are required to be built on the river bed before the piers are built, and after the cofferdams are built, the pile foundations are built in the cofferdams. At present, most of geological layers in the river bed are hard rocks, so that the difficulty in constructing the cofferdam is increased.
At present, most of common cofferdams are locking steel pipes, the locking steel pipes are mutually connected with each other to form a cofferdam, and then a weir mouth support is arranged in the cofferdam to improve the bearing strength and the sealing degree of the cofferdam. However, due to the blocking effect of the locking structure and the hard rock layer of the locking steel pipes, the joint resistance of two adjacent locking steel pipes is larger, that is to say, when the locking steel pipes are impacted, the locking steel pipes can shift, and when shifting, the locking steel pipes which are installed can apply larger resistance to the locking steel pipes to be installed through the locking, so that the installation speed is influenced, the problem that the locking steel pipes incline easily occurs after the installation, and the installation of the subsequent locking steel pipes is influenced. After the lock catch steel pipes are installed, the problem that the inner walls of the cofferdam are not flush easily occurs, so that the difficulty of installing the weir crest support is increased, and after the installation, the condition that the weir crest support is difficult to be in a state with equal spacing with all the lock catch steel pipes in the cofferdam is easily caused, so that the subsequent sealing treatment is affected.
Therefore, the invention provides a rotary drilling pile foundation construction device and method for combining hard rock with stratum.
Disclosure of Invention
The invention aims at: in order to solve the problems of large butt joint and connection resistance of lock catch steel pipes, the problem that the installation of a weir crest support is affected by the fact that the inner wall is not flush after the cofferdam is formed, the construction device and the construction method for the rotary drilling pile foundation of the hard rock combined stratum are provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a hard rock combines rotary drilling pile foundation construction device in stratum, includes the construction platform, be provided with the pile foundation mouth on the construction platform, the top of construction platform is provided with the guide beam that is located pile foundation mouth avris, is provided with the slider on this guide beam, sliding connection has the stand about one side of slider, the top of stand hangs through the V type pole and is connected with interior movable strut and is located the outer movable spacing of interior movable strut one side, be provided with interior inflation drive inserted bar on the interior movable strut, be provided with outer clamping ring frame on the outer movable spacing, the top of construction platform is provided with the portal frame, is provided with the lifter on this portal frame, the bottom fixedly connected with of this lifter hangs the post, and the bottom of this hanging the post articulates there are four vaulting poles, four the equal fixedly connected with push pedal of free end of vaulting pole, the last relative vaulting pole of hanging post is synchronous syntropy swing setting.
As a further description of the above technical solution:
The utility model discloses a pile foundation, including the guide beam, the both ends fixedly connected with landing leg of guide beam, the constant head tank that is close to pile foundation mouth avris and peg graft complex with the landing leg has been seted up at construction platform's top, rotate on the guide beam and be connected with the lead screw of closing soon with the slider and be connected, one side fixedly connected with stand upper and lower sliding fit's uide bushing of slider.
As a further description of the above technical solution:
The inner movable support comprises a top support plate, the inner expansion driving inserting rod comprises a pile column and a plurality of eccentric rollers, the top of the pile column is fixedly connected with the bottom of the top support plate, the eccentric rollers are arranged on the periphery of the pile column, the top of each eccentric roller is provided with a swing arm, the top of each pile column is provided with a jack, and one side of each swing arm is connected with a pin shaft in a sliding mode.
As a further description of the above technical solution:
the outer clamping ring frame comprises a positioning plate positioned on one side of the top supporting plate, a C-shaped ring opening is formed in the positioning plate, the outer clamping ring frame comprises a clamping shaft in screwed connection with one end of the positioning plate and a V-shaped roller positioned in the C-shaped ring opening, and one side of a roller frame on which the V-shaped roller is in sliding connection with the positioning plate is in rotary connection with one end of the clamping shaft.
As a further description of the above technical solution:
The bottom fixedly connected with round platform of post hangs, lower floor's gear storehouse and upper strata gear storehouse have been seted up to the bottom of this round platform, lower floor's gear storehouse internal rotation is connected with two lower gears of intermeshing, upper strata gear storehouse internal rotation is connected with two upper gears of intermeshing, the equal fixedly connected with of peripheral wall of lower gear and upper gear and stay bar fixed connection's connecting rod, the axis of rotation of lower gear and upper gear is perpendicular.
As a further description of the above technical solution:
One side of the push plate is provided with a rotary roller.
The construction method of the rotary drilling pile foundation combining hard rock with stratum is characterized by comprising the following steps: step one, building a construction platform, sequentially machining a plurality of slots on the construction platform by using rotary drills, and righting the rotary drills during machining so that all the slots are enclosed into a square shape.
And secondly, hanging a single lock catch steel pipe into a single slot, and then supporting the lock catch steel pipe by using a protective sleeve to enable the lock catch steel pipe to be in a vertical state and ensure that a lock catch sleeve on the lock catch steel pipe is in a connection position.
And thirdly, knocking the top of the lock catch steel pipe by using an impact hammer, so that the lock catch steel pipe is inserted into the bottom of the slot.
And fourthly, hoisting another locking steel pipe on one side of the mounted locking steel pipe by means of the inner movable supporting frame and the outer clamping ring frame, and then performing impact mounting, so that slot mounting of all the locking steel pipes is completed and a square cofferdam is formed.
And fifthly, supporting and shaping the inner peripheral wall of the weir crest by using four push plates.
And step six, hanging and placing a slice support in the slice, and then installing padding between the slice support and the lock catch steel pipe.
And step seven, installing a large-caliber column support in the weir crest support.
As a further description of the above technical solution:
And installing a water seal or pouring concrete at the joint of the adjacent lock catch steel pipes.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. According to the invention, the inner movable supporting frame and the outer movable limiting frame are arranged to facilitate butt joint of the mounted lock catch steel pipes and the unmounted lock catch steel pipes, and the resistance of staggered movement of the lock catch steel pipes to be mounted and the mounted lock catch steel pipes can be greatly reduced when the lock catch steel pipes to be mounted are hammered, so that the lock catch connection efficiency of the two lock catch steel pipes is greatly improved.
2. According to the invention, the portal frame, the lifting rods, the suspension columns and the four supporting rods are arranged, and the push plates are arranged at the free ends of the four supporting rods.
3. According to the invention, through righting control on rotary excavation, the slot for the processed lock catch steel pipe is in a vertical state, the verticality of the lock catch steel pipe after hammering installation is improved, the lock catch steel pipe in the cofferdam is firstly corrected and leveled, and then the weir opening support is installed in the cofferdam, so that the difficulty of the installation of the weir opening support can be reduced, the bearing strength of the whole cofferdam is improved, and the subsequent sealing treatment is facilitated.
Drawings
FIG. 1 is a schematic structural view of a construction device for rotary drilling pile foundation of hard rock combined stratum;
FIG. 2 is a schematic view of the structure of FIG. 1 with a portion "a" enlarged;
FIG. 3 is a schematic structural view of an outer movable limiting frame of a rotary drilling pile foundation construction device for hard rock combined with stratum;
Fig. 4 is a schematic structural diagram of connection between a circular table and a stay bar of a rotary drilling pile foundation construction device for combining hard rock with stratum.
Legend description:
1. A construction platform; 11. a positioning groove; 2. pile foundation openings; 3. a guide beam; 31. a support leg; 4. a slide block; 5. a column; 8. a V-shaped rod; 9. an inner movable support; 91. the inner expansion drives the inserted link; 911. pile columns; 9111. a jack; 912. an eccentric roller; 9121. swing arms; 91211. a pin shaft; 92. a top pallet; 101. an outer movable limiting frame; 1011. an outer clamping ring frame; 10111. a positioning plate; 101111, C-ring mouth; 10112. a clamping shaft; 10113. a V-shaped roller; 102. a portal frame; 103. a lifting rod; 104. a hanging column; 1041. round bench; 10411. a lower layer gear bin; 10412. an upper layer type gear bin; 105. a brace rod; 1051. a push plate; 10511. a rotating roller; 106. and (5) a screw rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-4, a construction device for a rotary drilling pile foundation of a hard rock combined stratum comprises a construction platform 1, wherein a pile foundation opening 2 is formed in the construction platform 1, the construction platform 1 is an operation platform for pile foundation manufacture, a rotary drilling rig is placed on the construction platform 1, a rotary drilling rig drills through the pile foundation opening 2 to process slots, and the rotary drilling rig moves to process a plurality of slots, wherein the slots are mounting slots for lock catch steel pipes.
The top of construction platform 1 is provided with the guide beam 3 that is located pile foundation mouth 2 avris, be provided with slider 4 on this guide beam 3, specifically the both ends fixedly connected with landing leg 31 of guide beam 3, the constant head tank 11 that is close to pile foundation mouth 2 avris and peg graft complex with landing leg 31 is offered at the top of construction platform 1, rotate on the guide beam 3 and be connected with the lead screw 106 that closes the connection soon with slider 4, sliding fit's uide bushing about one side fixedly connected with stand 5 of slider 4, the effect that this kind of setting is the position that can adjust whole guide beam 3 place, the convenient processing position that switches.
The vertical sliding connection has stand 5 about one side of slider 4, the top of stand 5 is through V type pole 8 suspension connection has interior movable strut 9 and be located the outer movable spacing 101 of interior movable strut 9 one side, be provided with interior inflation drive inserted bar 91 on the interior movable strut 9, specifically interior movable strut 9 includes top layer board 92, interior inflation drive inserted bar 91 includes stake 911 and a plurality of eccentric roller 912 of setting in stake 911 periphery of top and top layer board 92 bottom fixed connection, wherein the otic placode of rotating connection with the roller of eccentric roller 912 is fixed connection at the both ends of stake 911, the top of eccentric roller 912 is provided with swing arm 9121, the one end fixed connection of the roller of swing arm 9121 and eccentric roller 912, jack 9111 has been seted up at the top of stake 911, one side sliding connection of swing arm 9121 has round pin axle 91211, round pin axle 91211 and jack 9111 cooperation use, the purpose is locked eccentric roller 912. In use, the inner expansion driving plunger 91 is inserted into the top of an already installed lock steel tube.
The outer movable limiting frame 101 is provided with an outer clamping ring frame 1011, specifically the outer clamping ring frame 1011 comprises a positioning plate 10111 positioned at one side of a top supporting plate 92, a C-shaped ring opening 101111 is formed on the positioning plate 10111, the outer clamping ring frame 1011 comprises a clamping shaft 10112 in screwed connection with one end of the positioning plate 10111 and a V-shaped roller 10113 positioned in the C-shaped ring opening 101111, one side of a roller frame on which the V-shaped roller 10113 and the positioning plate 10111 are in sliding connection with one end of the clamping shaft 10112 are in rotating connection, specifically a guide plate in sliding connection with the positioning plate 10111 is welded on the roller frame of the V-shaped roller 10113, under the action of the clamping shaft 10112, the V-shaped roller 10113 applies extrusion force to a lock catch steel pipe placed in the C-shaped ring opening 101111, and the direction of the extrusion force is towards the adjacent installed lock catch steel pipe. During the use, will need install the hasp steel pipe and lead-in through outer clamp ring frame 1011, the convenience dock with the hasp steel pipe that has installed, specifically the hasp butt joint on two hasp steel pipes uses the jump bit installation to strike and wait to install the hasp steel pipe after the butt joint, this kind of setting can reduce the resistance that adjacent hasp steel pipe links up, also can not appear the problem of hasp steel pipe slope.
The top of the construction platform 1 is provided with a portal frame 102, the portal frame 102 is provided with a lifting rod 103, the lifting rod 103 is an oil cylinder, the bottom of the lifting rod 103 is fixedly connected with a hanging column 104, the output end of the oil cylinder is fixedly connected with the top of the hanging column 104, the bottom of the hanging column 104 is hinged with four supporting rods 105, each supporting rod 105 of the four supporting rods 105 corresponds to one surface on the inner side of a square cofferdam, the length of each supporting rod 105 is determined according to the specification of a weir mouth, the free ends of the four supporting rods 105 are fixedly connected with a push plate 1051, when the construction platform is used, the push plate 1051 and the peripheral wall of an inserted lock catch steel pipe are propped against each other, the opposite supporting rods 105 on the hanging column 104 are arranged in a synchronous and same-direction swinging mode, in particular, the bottom of the hanging column 104 is fixedly connected with a round table 1041, the bottom of the round table 1041 is provided with a lower layer gear bin 10411 and an upper layer gear bin 10412, two lower gears meshed with each other are rotatably connected with each other in the lower layer gear bin 10412, two upper gears meshed with each other are rotatably, the two upper gears meshed with each other, and the upper gears 105 are connected with the peripheral walls of the upper gears 105 in a rotary mode, and the upper supporting rods are connected with the opposite shafts and the upper supporting rods 105 in a rotary mode, and the upper supporting rods are perpendicular to the opposite shafts are connected. This kind of setting can ensure that the relative lateral wall atress is even in the weir mouth, and four vaulting poles 105 cooperation push pedal 1051 have the effect of correcting the hasp steel pipe of the range after the installation, and the convenience is put in the weir mouth after correcting and is propped, reduces the degree of difficulty that the weir mouth propped the installation, and the weir mouth props square frame construction, and it plays the cofferdam that forms the hasp steel pipe and improves the effect of supporting strength. Wherein, one side of push pedal 1051 is provided with roller 10511, roller 10511 can with hasp steel pipe contact, this kind of setting can not harm the hasp steel pipe.
A construction method of a rotary drilling pile foundation by combining hard rock with stratum comprises the following steps:
Step one, building a construction platform 1, sequentially machining a plurality of slots on the construction platform 1 by using rotary drills, and righting the rotary drills during machining to enable all the slots to enclose a square, wherein all the slots are connected.
After the slot is machined, firstly hanging a single lock catch steel pipe into the single slot by using a crane, then supporting the lock catch steel pipe by using a pile casing to enable the lock catch steel pipe to be in a vertical state, and ensuring that a lock catch sleeve on the lock catch steel pipe is in a connection position, specifically, enabling a lock catch to be oriented to the installation position of the next lock catch steel pipe.
And thirdly, knocking the top of the lock catch steel pipe by using an impact hammer, enabling the lock catch steel pipe to be inserted into the bottom of the slot, and then ensuring that the lock catch steel pipe is in a vertical state.
And fourthly, hoisting another locking steel pipe on one side of the mounted locking steel pipe by means of the inner movable supporting frame 9 and the outer clamping ring frame 1011, and then performing impact mounting, wherein the effect of the mode reduces the difficulty of butt joint of the locking steel pipe and the adjacent locking steel pipe, and accordingly slot mounting of all the locking steel pipes is completed and a square cofferdam is formed.
And fifthly, correcting the square cofferdam in the fourth step, namely supporting and shaping the inner peripheral wall of the weir crest by using four pushing plates 1051, so that the four rows of locking steel pipes are in a flush state.
And step six, hanging a weir crest support in the weir crest, then installing padding between the weir crest support and the lock catch steel pipes, wherein the padding is used for filling gaps between the weir crest support and the lock catch steel pipes, and after the padding is installed, installing a water-stop seal or pouring concrete at the joint of the adjacent lock catch steel pipes, wherein the water-stop seal or the pouring concrete plays a role in sealing and waterproofing.
And step seven, installing a large-caliber column support in the weir crest support, and reducing the support density and increasing the working space in the cofferdam by using a large-diameter inner support.
The working principle of the pile foundation construction device is as follows: firstly, a rotary drilling bit is used on a construction platform 1 to process a slot for installing a lock catch steel pipe, then the rotary drilling bit is removed, and the following operations are carried out:
and (3) installing a guide component: the guide beam 3 is arranged in two positioning grooves 11 on one side of the cofferdam through the supporting legs 31, and then the screw 106 is controlled to rotate to drive the sliding block 4 to move to one end of the guide beam 3.
Installing a single lock catch steel pipe: and inserting a lock catch steel pipe into the slot by using the crane, and then using the impact hammer to impact and install the lock catch steel pipe to finish the installation of the lock catch steel pipe.
Docking: the control slide block 4 slides to the upper part of the mounted lock catch steel pipe, the inner movable support 9 is ensured to be at the highest position, then the inner movable support 9 is released to be inserted into the mounted lock catch steel pipe, the top support plate 92 is lapped in the mounted lock catch steel pipe, then the eccentric roller 912 is driven to rotate through the swing arm 9121, the eccentric roller 912 can squeeze the inner peripheral wall of the lock catch steel pipe, at the moment, the inner movable support 9 and the lock catch steel pipe are in a fastening connection state, then the other lock catch steel pipe is hoisted and lowered through the C-shaped ring opening 101111, locks on the two lock catch steel pipes are aligned, at the moment, the control clamping shaft 10112 rotates, the V-shaped roller 10113 can squeeze the lock catch steel pipe to be mounted, the lock catch steel pipe and the lock catch steel pipe to be docked are in an aligned state, then the lock catch steel pipe to be mounted is impacted by using the impact hammer, and the two lock catch steel pipes can be successfully and quickly docked under the limitation of the inner movable support 9 and the outer clamping ring frame 1011, and the installation of all lock catches is completed in this way.
Installing a slice support: the method comprises the steps of pre-lifting a weir crest support below a portal frame 102, then controlling a lifting rod 103 to descend, enabling a sagged support rod 105 and a push plate 1051 on the sagged support rod to penetrate through the weir crest support and then enter a cofferdam, welding a baffle plate at the same height position of the outer wall of each locking steel pipe in the cofferdam, unfolding the support rod 105, putting a rotating roller 10511 on the baffle plate, continuously controlling the lifting rod 103 to descend, enabling the locking steel pipes in the cofferdam to be in a flush state under the pushing of the support rod 105, at the moment, easily lifting the weir crest support to the middle position in the cofferdam, then placing padding between the weir crest support and the locking steel pipes, and fastening and connecting the weir crest support and the locking steel pipes by using bolts.
Withdrawal: the lifting rod 103 is controlled to lift, at this time, the four stay bars 105 can be easily separated from the lock catch steel pipes and droop, then move upwards from the weir crest support and separate, and at this time, sealing and waterproof treatment can be carried out at the joint of the adjacent lock catch steel pipes.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a hard rock combines rotary drilling pile foundation construction device in stratum, includes construction platform (1), be provided with pile foundation mouth (2) on construction platform (1), its characterized in that, the top of construction platform (1) is provided with guide beam (3) that are located pile foundation mouth (2) avris, is provided with slider (4) on this guide beam (3), sliding connection has stand (5) about one side of slider (4), the top of stand (5) is hung through V type pole (8) and is connected with interior movable strut (9) and is located the outer movable spacing (101) of interior movable strut (9) one side, be provided with interior inflation drive inserted bar (91) on interior movable strut (9), be provided with outer clamping ring frame (1011) on outer movable spacing (101), the top of construction platform (1) is provided with portal frame (102), is provided with lifter (103) on this portal frame (102), the bottom fixedly connected with suspension post (104) of this lifter (103), the bottom of this suspension post (104) hangs four articulated strut (105), four strut (105) are all connected with synchronous push pedal (105) to synchronous end (105) on the same swing free end (1);
The two ends of the guide beam (3) are fixedly connected with supporting legs (31), a positioning groove (11) which is close to the side of the pile foundation opening (2) and is in plug-in fit with the supporting legs (31) is formed in the top of the construction platform (1), a screw rod (106) which is in rotary fit with the sliding block (4) is rotationally connected to the guide beam (3), and a guide sleeve which is in vertical sliding fit with the upright column (5) is fixedly connected to one side of the sliding block (4);
The inner movable support (9) comprises a top support plate (92), the inner expansion driving inserting rod (91) comprises a pile column (911) with the top fixedly connected with the bottom of the top support plate (92) and a plurality of eccentric rollers (912) arranged on the periphery of the pile column (911), swing arms (9121) are arranged at the tops of the eccentric rollers (912), jacks (9111) are formed at the tops of the pile column (911), and one side of each swing arm (9121) is connected with a pin shaft (91211) in a sliding mode;
The outer clamping ring frame (1011) comprises a positioning plate (10111) positioned at one side of the top supporting plate (92), the positioning plate (10111) is provided with a C-shaped ring opening (101111), the outer clamping ring frame (1011) comprises a clamping shaft (10112) which is rotationally connected with one end of the positioning plate (10111) and a V-shaped roller (10113) positioned in the C-shaped ring opening (101111), and the V-shaped roller (10113) is rotationally connected with one side of the roller frame on which the positioning plate (10111) is slidingly connected and one end of the clamping shaft (10112);
The bottom fixedly connected with round platform (1041) of suspension post (104), lower floor's gear storehouse (10411) and upper strata gear storehouse (10412) have been seted up to the bottom of this round platform (1041), lower floor's gear storehouse (10411) internal rotation is connected with two lower gears of intermeshing, upper strata gear storehouse (10412) internal rotation is connected with two upper gears of intermeshing, the equal fixedly connected with of periphery wall of lower gear and upper gear and stay bar (105) fixed connection's connecting rod, the rotation axis of lower gear and upper gear is perpendicular.
2. The rotary drilling pile foundation construction device for hard rock combined stratum according to claim 1, wherein a rotary roller (10511) is arranged on one side of the push plate (1051).
3. A construction method using the rotary drilling pile foundation construction device for hard rock combined with stratum according to any one of claims 1-2, characterized by comprising the following steps:
firstly, building a construction platform (1), sequentially machining a plurality of slots on the construction platform (1) by using rotary drills, and righting the rotary drills during machining to ensure that all the slots are enclosed into a square;
secondly, hanging a single lock catch steel pipe into a single slot, and then supporting the lock catch steel pipe by using a protective cylinder to enable the lock catch steel pipe to be in a vertical state, and ensuring that a lock catch sleeve on the lock catch steel pipe is in a connection position;
thirdly, knocking the top of the lock catch steel pipe by using an impact hammer so that the lock catch steel pipe is inserted into the bottom of the slot;
hoisting another locking steel pipe on one side of the mounted locking steel pipe by means of an inner movable supporting frame (9) and an outer clamping ring frame (1011), and then performing impact mounting, so that slot mounting of all the locking steel pipes is completed and a square cofferdam is formed;
fifthly, supporting and shaping the inner peripheral wall of the weir crest by using four pushing plates (1051);
step six, hanging and placing a weir crest support in the weir crest, and then installing padding between the weir crest support and the lock catch steel pipe;
And step seven, installing a large-caliber column support in the weir crest support.
4. A construction method of a rotary drilling pile foundation for hard rock combined stratum according to claim 3, wherein water-stop seals or casting concrete are installed at the joints of adjacent lock catch steel pipes.
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| CN202311154031.8A CN117166462B (en) | 2023-09-08 | 2023-09-08 | Rotary drilling pile foundation construction device and method for hard rock combined stratum |
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| CN202311154031.8A CN117166462B (en) | 2023-09-08 | 2023-09-08 | Rotary drilling pile foundation construction device and method for hard rock combined stratum |
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| CN113322990A (en) * | 2021-07-08 | 2021-08-31 | 中建三局集团有限公司 | Construction method of lock catch steel pipe pile cofferdam suitable for thin-covering-layer hard riverbed |
| CN215165468U (en) * | 2021-06-15 | 2021-12-14 | 湖北波森特岩土工程有限公司 | High-precision automatic packing ramming equipment for construction of compression-resistant piles |
| CN114277819A (en) * | 2021-12-25 | 2022-04-05 | 中铁广州工程局集团有限公司 | Construction method of super-long CO male-female lock catch steel pipe pile cofferdam |
| CN116136095A (en) * | 2023-03-05 | 2023-05-19 | 中铁五局集团第二工程有限责任公司 | Construction method of deep and large-grain-size sandy pebble cover layer riverbed locking steel pipe pile cofferdam |
| CN116220079A (en) * | 2023-03-27 | 2023-06-06 | 广东水电二局股份有限公司 | Locking steel pipe pile cofferdam structure method |
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| CN113322990A (en) * | 2021-07-08 | 2021-08-31 | 中建三局集团有限公司 | Construction method of lock catch steel pipe pile cofferdam suitable for thin-covering-layer hard riverbed |
| CN114277819A (en) * | 2021-12-25 | 2022-04-05 | 中铁广州工程局集团有限公司 | Construction method of super-long CO male-female lock catch steel pipe pile cofferdam |
| CN116136095A (en) * | 2023-03-05 | 2023-05-19 | 中铁五局集团第二工程有限责任公司 | Construction method of deep and large-grain-size sandy pebble cover layer riverbed locking steel pipe pile cofferdam |
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| CN117166462A (en) | 2023-12-05 |
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