CN115949082B - Cofferdam structure and construction method thereof - Google Patents
Cofferdam structure and construction method thereof Download PDFInfo
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- CN115949082B CN115949082B CN202310027148.3A CN202310027148A CN115949082B CN 115949082 B CN115949082 B CN 115949082B CN 202310027148 A CN202310027148 A CN 202310027148A CN 115949082 B CN115949082 B CN 115949082B
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Abstract
The invention discloses a cofferdam structure and a construction method thereof, and belongs to the technical field of cofferdam construction. Including main atress stake, vertical the inserting riverbed, main atress stake is provided with four, and four main atress stake are located the rectangle four corners respectively, and the breakwater mounting groove sets up the opposite face at four main atress stake, and the extending direction of breakwater mounting groove is the same with the extending direction of main atress stake, and inboard breakwater is located the opposite side of main atress stake, and inboard breakwater is provided with four altogether, and inboard breakwater extends to the breakwater mounting groove of two main atress stake respectively towards the both ends of main atress stake. The invention uses the main stress pile and the inner water baffle to provide support for the peripheral weir structure, so that the main stress pile and the inner water baffle can jointly block water flow impact, and the impact resistance of the peripheral weir structure can be improved, thereby ensuring the subsequent construction safety degree and further improving the construction safety.
Description
Technical Field
The invention relates to a cofferdam structure and a construction method thereof, and belongs to the technical field of cofferdam construction.
Background
The cofferdam is a temporary building envelope constructed for constructing permanent hydraulic facilities in hydraulic engineering construction, and has the function of preventing water and soil from entering a construction position of a building so as to drain water in the cofferdam, excavate a foundation pit and construct the building.
The traditional cofferdam structure is mostly suitable for the construction environment of still water, and for the construction environment of moving water, the traditional cofferdam structure such as earth-rock cofferdam can not keep stable under the continuous impact of water flow, so that the stability of the cofferdam is seriously influenced, and meanwhile, the construction safety is seriously influenced under the working condition.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the cofferdam structure and the construction method thereof solve the problems that in the prior art, part of traditional cofferdam structures cannot be kept stable under the continuous impact of water flow, so that the stability of the cofferdam is seriously influenced, and the construction safety is seriously influenced under the working condition.
The technical problems to be solved by the invention are realized by adopting the following technical scheme: a cofferdam structure, comprising
The main stress piles are vertically inserted into the river bed, four main stress piles are arranged, the four main stress piles are respectively positioned at four corners of the rectangle,
the water baffle mounting grooves are arranged on the opposite surfaces of the four main stress piles, the extending direction of the water baffle mounting grooves is the same as the extending direction of the main stress piles,
the inner side water baffles are positioned on the opposite sides of the main stress piles, four inner side water baffles are arranged, the two ends of the inner side water baffles, which face the main stress piles, extend into the water baffle mounting grooves of the two main stress piles respectively, the inner side water baffles are in sliding butt joint with the water baffle mounting grooves and are sealed at the butt joint positions, the four inner side water baffles and the four main stress piles form a closed rectangular structure together,
the peripheral weir structure is arranged at the outer side of the closed rectangular structure and is connected with the main stress pile,
the peripheral weir structure, the main stress pile and the inner water baffle form a water baffle structure together, and water flow is prevented from entering the inner side of the closed rectangular structure.
Through adopting above-mentioned technical scheme, use main atress stake and inboard breakwater to provide the support for peripheral weir structure, make it block the rivers impact jointly, can improve the shock resistance of peripheral weir structure to make follow-up construction safety degree obtain guaranteeing, further improved construction safety.
The invention is further provided with: the peripheral weir structure comprises
The auxiliary stress piles are vertically inserted into the river bed, a plurality of auxiliary stress piles are arranged, the auxiliary stress piles are distributed on the outer side of the closed rectangular structure in an arc shape, the arc-shaped protruding ends of the auxiliary stress piles face to one side far away from the closed rectangular structure, the auxiliary stress piles close to the main stress piles are fixedly connected with the outer side wall of the main stress piles,
the outer water baffle is vertically inserted into the riverbed, the outer water baffle is sleeved outside the adjacent auxiliary stress piles, the main stress piles, the auxiliary stress piles, the outer water baffle and the inner water baffle surround to form a closed supporting structure, auxiliary stress piles and the outer water baffle are arranged on four sides of the outer side of the closed rectangular structure,
and the geotechnical bags are stacked in the closed supporting structure, and fully fill the inner side of the closed supporting structure.
Through adopting above-mentioned technical scheme, the vertical riverbed that inserts of supplementary atress stake, the outside breakwater is established to the cover simultaneously on supplementary atress stake, and outside breakwater stops rivers through this moment, fills a large amount of geotechnique bags through the one side at supplementary atress stake orientation closed rectangular structure, makes geotechnique bag and outside breakwater carry out the direct blocking to rivers, can geotechnique bag can provide stable support for outside breakwater this moment to avoid outside breakwater to take place deformation or slope in blocking rivers in-process, improved the stability of peripheral weir structure.
The invention is further provided with: the inner side of the closed rectangular structure is provided with a reinforcing device, and the reinforcing device comprises
The sliding adjusting groove is arranged on the opposite surface of the adjacent main stress pile, the extending direction of the sliding adjusting groove is the same as that of the water baffle mounting groove,
the sliding block is arranged in the sliding adjusting groove in a sliding way,
one end of the auxiliary water baffle is hinged with the two sliding blocks which are oppositely arranged, the other end of the auxiliary water baffle is in a movable state,
a vertical reinforcement arranged on one side of the sliding block facing the river bed,
the locking component is detachably arranged in the sliding adjusting groove,
wherein, the locking subassembly is through the mode of joint with supplementary breakwater and main atress stake fixed connection, and vertical reinforcement consolidates main atress stake through the mode of direct insertion riverbed.
Through adopting above-mentioned technical scheme, auxiliary breakwater passes through locking subassembly and slip adjustment tank and is fixed with main atress stake, this moment when rivers are impacted on peripheral weir structure, peripheral weir structure can give the inboard breakwater with the power, when rivers pressure is too big, the inboard breakwater can take place deformation and influence safety, use auxiliary breakwater and inboard breakwater butt this moment, the atress thickness of auxiliary breakwater and inboard breakwater in the rivers direction can be increased this moment, the power upper limit that auxiliary breakwater and inboard breakwater take place deformation improves this moment, thereby improve auxiliary breakwater and inboard breakwater's stability, avoid inboard breakwater atress to warp and influence construction safety, the position of auxiliary breakwater can be adjusted in real time through the sliding block in slip adjustment tank simultaneously, thereby can carry out real-time adjustment to auxiliary breakwater position according to the inside depth of water of closed rectangle structure and the depth of cut into the river bed, auxiliary breakwater's adjustability has been improved.
The invention is further provided with: the vertical reinforcement comprises an expansion stress rod which is arranged in the sliding adjusting groove, the expansion stress rod slides along the extending direction of the sliding adjusting groove, one end of the sliding adjusting groove, which faces the river bed, is an opening, and the expansion stress rod extends outwards from the opening of the sliding adjusting groove.
Through adopting above-mentioned technical scheme, when supplementary breakwater moves to the position that is close to the riverbed, indicate at this moment that the inboard water level of closed rectangle structure or riverbed highly reduce, the power that shifts to on the main atress stake through peripheral weir structure, inboard breakwater and supplementary breakwater at this moment increases, inserts deeper riverbed through expanding the vertical motion of atress pole, can improve the anti-tilt ability of main atress stake to improve the stability of main atress stake, and then improve overall structure's stability, be favorable to guaranteeing construction safety.
The invention is further provided with: the locking assembly comprises
The fixed clamping hole is arranged on the opposite surface of the sliding adjusting groove, and the extending direction of the fixed clamping hole is perpendicular to the sliding adjusting groove.
The movable clamping hole is arranged on one side surface of the auxiliary water baffle, which faces the sliding adjusting groove, the extending direction of the movable clamping hole is the same as that of the fixed clamping hole,
the connecting block is arranged in the sliding adjusting groove in a sliding way along the extending direction of the sliding adjusting groove,
the sliding cavity is arranged in the connecting block, the extending direction of the sliding cavity is the same as that of the connecting block,
the abutting separation block is arranged in the abutting separation block in a sliding way along the extending direction of the sliding cavity,
the clamping blocks are arranged on one side of the sliding cavity close to the river bed, two clamping blocks are arranged and slide in the sliding cavity towards the directions of the fixed clamping holes and the movable clamping holes respectively, the end parts of the two clamping blocks can penetrate through the connecting block and extend into the fixed clamping holes and the movable clamping holes respectively, gaps exist between the clamping blocks, the abutting separation blocks can move into the gaps to push the clamping blocks to the directions away from each other,
and the driving part is arranged on one side of the abutting and separating block away from the clamping block and is used for driving the abutting and separating block to slide in the sliding cavity.
Through adopting above-mentioned technical scheme, drive portion passes through the vertical position of drive butt separation piece to adjust the distance between two joint pieces, it is too big when the distance between two joint pieces, two joint pieces extend to in fixed joint hole and the activity joint hole respectively this moment, make supplementary breakwater keep away from articulated one end and main atress stake and pass through locking component fixed, supplementary breakwater can keep the support to inboard breakwater for a long time this moment, be favorable to improving the connection stability of inboard breakwater and supplementary breakwater.
The invention is further provided with: the joint piece opposite face is provided with the connection chamber, is provided with connecting spring in the connection chamber, and connecting spring's both ends are respectively with two joint piece fixed connection.
Through adopting above-mentioned technical scheme, when the butt separation piece moves to the direction of keeping away from the joint piece, can be with two joint pieces to the direction pulling that is close to each other through connecting spring's elasticity effect, thereby make two joint pieces deviate from in fixed joint hole and the activity joint hole respectively and assist the breakwater this moment and can follow articulated department upset, when assist the breakwater upset and with the inboard parallel butt of riverbed bottom of closed rectangle structure, two relative assist breakwater will seal the inboard riverbed face of rectangle structure and shelter from, because the riverbed texture is softer, shelter from the pressure that can make the riverbed unit area receive through assist the breakwater this moment, make object and apparatus that weight is great can remove at the riverbed surface temporarily, the degree of convenience to the inboard construction of closed rectangle structure has been improved.
The invention is further provided with: the driving part comprises
The thread block is fixedly connected with the abutting separation block, is arranged in the sliding cavity in a sliding way along the extending direction of the sliding cavity,
the axial direction of the threaded rod is the same as the extending direction of the sliding cavity, one end of the threaded rod extends into the threaded block to be in threaded connection with the threaded block, and one end of the threaded rod, which is far away from the threaded block, penetrates through the connecting block to extend to the outer side of the connecting block.
Through adopting above-mentioned technical scheme, the threaded rod can drive the threaded piece through the threaded connection with the threaded piece in the rotatory in-process and slide in the slip intracavity, because butt separation piece and threaded piece fixed connection, can adjust the position of butt separation piece this moment, reached the purpose of real-time drive butt separation piece, drive simple structure and easy operation.
The invention is further provided with: one side of the clamping block facing the abutting separation block is an outward expansion inclined plane, the outward expansion inclined plane inclines towards the sliding direction of the clamping block, the distance between the outward expansion inclined planes on the two clamping blocks facing one end of the abutting separation block is larger than the distance between the two clamping blocks facing one end of the abutting separation block, and one end of the outward expansion inclined plane facing the clamping block is an inward contraction inclined plane parallel to the outward expansion inclined plane.
Through adopting above-mentioned technical scheme, the outward-expanding inclined plane can make the butt separation piece get into the clearance between two joint pieces more easily to the in-process that the joint piece removed, avoids the joint piece to reset after long-time use and takes place the error and leads to the butt separation piece unable clearance between the joint piece of inserting, has improved locking assembly's reliability in use.
The invention is further provided with: the end of the main stress pile, which is inserted into the river bed, is in a conical shape, and the end of the inner water baffle and the expansion stress rod, which faces the river bed, is in a tip furling shape.
Through adopting above-mentioned technical scheme, the one end of main atress stake sets up to the toper, and inboard breakwater and the one end that expands the atress pole towards the riverbed are pointed end simultaneously, can make main atress stake, inboard breakwater and expand the atress pole more smooth and easy when inserting the riverbed like this, the installation construction of main atress stake, inboard breakwater and expansion atress pole.
A construction method of a cofferdam structure comprises the following steps:
s1: lifting the four main stress piles sequentially by using a crane, and vertically inserting the main stress piles into a river bed to enable the end parts of the main stress piles to be completely immersed in the river bed, wherein the four main stress piles are respectively positioned at four corners of a rectangle during lifting;
s2: inserting an inner side water baffle into the opposite side of the adjacent main stress pile, extending the inner side water baffle towards the end of the main stress pile to the water baffle mounting groove, inserting the inner side water baffle into the river bed towards one end of the river bed,
s3: lifting a plurality of auxiliary stress piles by using a crane, and vertically inserting the auxiliary stress piles into a river bed to enable the auxiliary stress piles to form arc distribution;
s4: sleeving the outer water baffle onto the adjacent auxiliary stress pile, and axially inserting the end part of the outer water baffle into the river bed along the auxiliary stress pile;
s5: lifting the geotechnical bags by using a crane, and then stacking and placing the geotechnical bags inside a closed supporting structure;
s6: and pumping out the water in the closed rectangular structure by using a water pump.
Through adopting above-mentioned technical scheme, insert the riverbed with main atress stake earlier, it is less to block rivers area this moment, the rivers impact force that main atress stake received is less, be favorable to keeping the stability of main atress stake, use inboard breakwater to make up four main atress stake composite connection to a closed rectangular structure after four main atress stake installations, inboard breakwater and main atress stake all insert in the riverbed this moment, block rivers area grow but owing to form overall structure, closed rectangular structure stability degree is higher this moment, then install supplementary atress stake and outside breakwater in proper order outside closed rectangular structure and be favorable to guaranteeing cofferdam structure's stability, through pile up geotechnical bag at the confined space, can avoid partial geotechnical bag to be washed away by rivers to appear, the stability of overall cofferdam structure is higher after the installation, can directly pass through the water pump with the inboard water drainage of closed rectangular structure and carry out subsequent construction.
The beneficial effects of the invention are as follows:
1. the main stress pile and the inner water baffle are used for supporting the peripheral weir structure, so that the peripheral weir structure can jointly block water flow impact, the impact resistance of the peripheral weir structure can be improved, the subsequent construction safety degree is ensured, and the construction safety is further improved.
2. The auxiliary stress pile is vertically inserted into the river bed, and meanwhile, the auxiliary stress pile is sleeved with the outer water baffle, at the moment, the outer water baffle blocks water flow, a large number of geotechnical bags are filled on one side of the auxiliary stress pile, which faces the closed rectangular structure, so that the geotechnical bags and the outer water baffle can directly block water flow, and at the moment, the geotechnical bags can provide stable support for the outer water baffle, so that the outer water baffle is prevented from deforming or inclining in the process of blocking water flow, and the stability of the peripheral weir structure is improved.
3. The position of the auxiliary water baffle can be adjusted by sliding the sliding block in the sliding adjusting groove, so that the position of the auxiliary water baffle can be adjusted in real time according to the depth of water inside the closed rectangular structure and the depth of excavation of the river bed, and the adjustability of the auxiliary water baffle is improved.
4. When the auxiliary water baffle moves to a position close to the river bed, the water level or the height of the river bed on the inner side of the closed rectangular structure is reduced, the force transferred to the main stressed pile through the peripheral weir structure, the inner water baffle and the auxiliary water baffle is increased, the deeper river bed is inserted through the vertical movement of the expansion stressed rod, the inclination resistance of the main stressed pile can be improved, the stability of the main stressed pile is improved, the stability of the whole structure is improved, and the construction safety is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the structure of the present invention when the locking assembly is used;
FIG. 4 is a schematic view of the structure of the present invention with the locking assembly removed;
FIG. 5 is a schematic view of a locking assembly according to the present invention;
FIG. 6 is a schematic view of the structure of the connection of the locking assembly of the present invention with the primary stress pile and the secondary splash plate, respectively.
In the figure: 10. a main stress pile; 11. auxiliary stress piles; 12. an outer water baffle; 13. an inner water baffle; 14. a geotechnical bag; 15. a water baffle mounting groove; 16. a peripheral weir structure; 20. an auxiliary water baffle; 21. expanding the stress rod; 22. a sliding adjustment groove; 23. a fixed clamping hole; 24. a movable clamping hole; 25. a sliding block; 30. a locking assembly; 31. a connecting block; 32. a sliding chamber; 33. a screw block; 34. abutting the separating block; 35. a threaded rod; 36. a clamping block; 37. a connecting cavity; 38. a connecting spring; 40. expanding the inclined plane; 41. and (5) an adduction inclined plane.
Detailed Description
The invention will be further described with reference to the following detailed drawings, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 6, a cofferdam structure and a construction method thereof, which comprises a main stress pile 10, an inner water baffle 13, a water baffle installation groove 15 and a peripheral weir structure 16, wherein the main stress pile 10 is vertically inserted into a river bed, the main stress pile 10 is provided with four main stress piles 10 which are respectively positioned at four corners of a rectangle, and one end of the main stress pile 10 inserted into the river bed is in a conical shape. The breakwater mounting groove 15 is arranged on the opposite surfaces of the four main stress piles 10, the extending direction of the breakwater mounting groove 15 is the same as that of the main stress piles 10, and one side of the breakwater mounting groove 15, which is far away from the conical end of the main stress pile 10, is an opening. The inner water baffle plates 13 are positioned on the opposite sides of the main stress pile 10, four inner water baffle plates 13 are arranged in total, and one end of the inner water baffle plates 13 facing the river bed is in a tip furling shape. The two ends of the inner side water baffle 13, which face the main stress piles 10, extend into water baffle installation grooves 15 of the two main stress piles 10 respectively, the inner side water baffle 13 and the water baffle installation grooves 15 are in sliding butt joint and the butt joint is sealed, and the four inner side water baffles 13 and the four main stress piles 10 form a closed rectangular structure together. The peripheral weir structure 16 is arranged outside the closed rectangular structure, and the peripheral weir structure 16 is connected with the main stress pile 10. The outer cofferdam structure 16, the main stress pile 10 and the inner water baffle 13 together form a water baffle structure, and water flow is prevented from entering the inner side of the closed rectangular structure. The peripheral weir structure 16 comprises an auxiliary stress pile 11, an outer water baffle 12 and a geotechnical bag 14, wherein the auxiliary stress pile 11 is vertically inserted into a river bed, a plurality of auxiliary stress piles 11 are arranged, the auxiliary stress piles 11 are distributed outside the closed rectangular structure in an arc shape, the arc-shaped protruding ends of the auxiliary stress piles 11 face to one side far away from the closed rectangular structure, and the auxiliary stress piles 11 close to the main stress pile 10 are fixedly connected with the outer side wall of the main stress pile 10. The four sides of the closed rectangular structure are provided with a plurality of arc-shaped bulges formed by auxiliary stress piles 11. The outside breakwater 12 is vertically inserted into the river bed, the outside breakwater 12 is sleeved outside the adjacent auxiliary stress piles 11, and a single outside breakwater 12 can only be sleeved on arc-shaped protrusions formed by a plurality of auxiliary stress piles 11 on one side of the closed rectangular structure. The main stress pile 10, the auxiliary stress pile 11, the outer water baffle 12 and the inner water baffle 13 are surrounded to form a closed supporting structure. The geotextile bags 14 are stacked within the enclosed support structure, with the geotextile bags 14 fully filling the inside of the enclosed support structure.
As shown in fig. 3 to 6, a reinforcement device is provided on the inner side of the closed rectangular structure, and the reinforcement device includes an auxiliary water baffle 20, a sliding adjustment groove 22, a sliding block 25, a vertical reinforcement member and a locking assembly 30, wherein the sliding adjustment groove 22 is provided on the opposite side of the adjacent main stress pile 10, and the extending direction of the sliding adjustment groove 22 is the same as that of the water baffle installation groove 15. The slide block 25 is slidably disposed in the slide adjustment groove 22, and the slide block 25 slides in the extending direction of the slide adjustment groove 22. The auxiliary water baffle 20 is rectangular plate-shaped, one end of the auxiliary water baffle 20 is hinged with two sliding blocks 25 which are oppositely arranged, the other end of the auxiliary water baffle 20 is in a movable state, at most two auxiliary water baffles 20 are arranged, and the two auxiliary water baffles 20 are oppositely arranged. The vertical reinforcement is provided at the side of the slider 25 facing the river bed. The locking assembly 30 is removably disposed within the sliding adjustment channel 22. The locking assembly 30 fixedly connects the auxiliary water baffle 20 with the main stressed pile 10 in a clamping manner, and the vertical reinforcement reinforces the main stressed pile 10 in a manner of being directly inserted into a river bed. The vertical reinforcement comprises an expansion stress rod 21, the expansion stress rod 21 is arranged in the sliding adjusting groove 22, the expansion stress rod 21 slides along the extending direction of the sliding adjusting groove 22, one end of the sliding adjusting groove 22, which faces the river bed, and one end, which is far away from the river bed, are both openings, and the expansion stress rod 21 extends outwards from the opening of the sliding adjusting groove 22.
As shown in fig. 5 to 6, the locking assembly 30 includes a fixed clamping hole 23, a movable clamping hole 24, a connection block 31, a sliding cavity 32, an abutting and separating block 34, a clamping block 36 and a driving part, the fixed clamping hole 23 is disposed on the opposite surface of the adjacent sliding adjustment groove 22, and the extending direction of the fixed clamping hole 23 is perpendicular to the extending direction of the sliding adjustment groove 22 and is perpendicular to the opposite surface of the sliding adjustment groove 22. The movable clamping hole 24 is arranged on one side surface of the auxiliary water baffle 20 facing the sliding adjusting groove 22, and the extending direction of the movable clamping hole 24 is the same as that of the fixed clamping hole 23. The connection block 31 is slidably provided in the sliding adjustment groove 22 in the extending direction of the sliding adjustment groove 22, and the connection block 31 can be pulled out and inserted through an end opening of the sliding adjustment groove 22 away from the river bed. The sliding chamber 32 is provided in the connection block 31, and the extending direction of the sliding chamber 32 is the same as that of the connection block 31. The abutting and separating block 34 is slidably arranged in the abutting and separating block 34 along the extending direction of the sliding cavity 32, the clamping blocks 36 are arranged on one side, close to the river bed, of the sliding cavity 32, two clamping blocks 36 are arranged in the sliding cavity 32 and slide towards the directions of the fixed clamping holes 23 and the movable clamping holes 24 respectively, the end parts of the two clamping blocks 36 can penetrate through the connecting block 31 and extend into the fixed clamping holes 23 and the movable clamping holes 24 respectively, gaps exist between the clamping blocks 36, and the abutting and separating block 34 can move into the gaps to push the clamping blocks 36 to move away from each other. The driving part is arranged at one side of the abutting and separating block 34 away from the clamping block 36, and is used for driving the abutting and separating block 34 to slide in the sliding cavity 32. The opposite surface of the clamping block 36 is provided with a connecting cavity 37, a connecting spring 38 is arranged in the connecting cavity 37, and two ends of the connecting spring 38 are fixedly connected with the two clamping blocks 36 respectively. The driving part comprises a thread block 33 and a threaded rod 35, the thread block 33 is fixedly connected with the abutting and separating block 34, and the thread block 33 is arranged in the sliding cavity 32 in a sliding manner along the extending direction of the sliding cavity 32. The axial direction of the threaded rod 35 is the same as the extending direction of the sliding cavity 32, one end of the threaded rod 35 extends into the threaded block 33 to be in threaded connection with the threaded block 33, and one end of the threaded rod 35 away from the threaded block 33 extends to the outer side of the connecting block 31 through the connecting block 31. The outward expansion inclined surface 40 is arranged on one side of the clamping block 36 facing the abutting and separating block 34, the outward expansion inclined surface 40 is inclined towards the sliding direction of the clamping block 36, the distance between the outward expansion inclined surfaces 40 on the two clamping blocks 36 facing one end of the abutting and separating block 34 is larger than the distance between the two clamping blocks facing one end of the abutting and separating block 34, and the inward expansion inclined surface 41 parallel to the outward expansion inclined surface 40 is arranged on one end of the clamping block 36.
When the cofferdam structure is constructed, the construction method comprises the following steps:
s1: the four main stress piles 10 are hoisted by using a ship-borne crane or a shore crane in sequence, then the main stress piles 10 can be vertically inserted into a riverbed by using equipment such as a ship-borne pile driver and the like, so that the conical end parts of the main stress piles 10 are completely inserted into and immersed in the riverbed, and the four main stress piles 10 are respectively positioned at four rectangular corners during hoisting;
s2: inserting an inner side water baffle 13 into the opposite side of the adjacent main stress pile 10, lifting the inner side water baffle 13 by a shipborne crane or a shore crane, aligning the end of the inner side water baffle 13 facing the main stress pile 10 with the opening of the water baffle mounting groove 15 away from the conical end of the main stress pile 10 and inserting the water baffle into the water baffle mounting groove 15, and inserting the inner side water baffle 13 into the river bed toward one end of the river bed;
s3: lifting a plurality of auxiliary stress piles 11 by using a crane, vertically inserting the auxiliary stress piles 11 into a river bed to enable the auxiliary stress piles 11 to form arc distribution, and welding or connecting the auxiliary stress piles 11 closest to the main stress pile 10 with the outer surface of the main stress pile 10 by using a threaded fastener;
s4: the outer water baffle 12 is sleeved on the adjacent auxiliary stress pile 11, and the end part of the outer water baffle 12 is axially inserted into the river bed along the auxiliary stress pile 11;
s5: lifting the geotechnical bags 14 by using a ship crane or a shore crane, and then stacking and placing the geotechnical bags inside a closed supporting structure;
s6: pumping out water in the closed rectangular structure by using a water pump, and digging the riverbed to increase the depth of the cofferdam after the water in the closed rectangular structure is pumped out;
s7: the locking assembly 30 can be selectively disassembled according to construction requirements and the upper load limit of the inner water baffle 13 and the peripheral weir structure 16 so that the auxiliary water baffle 20 can be overturned along the hinge, thereby enabling the auxiliary water baffle 20 to be abutted with the inner river bed of the closed rectangular structure, and the auxiliary water baffle 20 and the inner water baffle 13 are approximately vertical.
The main stress piles 10 are inserted into a riverbed, the blocking water flow area is smaller, the water flow impact force borne by the main stress piles 10 is smaller, the stability of the main stress piles 10 is kept, when the four main stress piles 10 are installed, the four main stress piles 10 are combined and connected into a closed rectangular structure by the inner water baffle 13, the inner water baffle 13 and the main stress piles 10 are inserted into the riverbed, the blocking water flow area is enlarged, the closed rectangular structure is higher in stability degree due to the integral structure, the auxiliary stress piles 11 and the outer water baffle 12 are sequentially installed outside the closed rectangular structure, the stability of the cofferdam structure is guaranteed, the situation that part of the geotechnical bags 14 are washed away by water flow can be avoided by stacking the geotechnical bags 14 in the closed space, the stability of the integral cofferdam structure is higher after the installation is finished, and the inner water of the closed rectangular structure can be directly discharged through a water pump and subsequent construction is carried out.
The main stress pile 10 and the inner water baffle 13 are used for supporting the peripheral weir structure 16, so that the peripheral weir structure 16 can jointly block water flow impact, the impact resistance of the peripheral weir structure 16 can be improved, the subsequent construction safety degree is ensured, and the construction safety is further improved. One end of the main stress pile 10 is arranged to be conical, and one end of the inner side water baffle 13 facing the river bed is pointed, so that the main stress pile 10 and the inner side water baffle 13 can be smoother when being inserted into the river bed, and the installation and construction of the main stress pile 10 and the inner side water baffle 13 are easy. The auxiliary stress pile 11 is vertically inserted into the river bed, meanwhile, the auxiliary stress pile 11 is sleeved with the outer water baffle 12, at the moment, the outer water baffle 12 blocks water flow, a large number of geotechnical bags 14 are filled at one side of the auxiliary stress pile 11 towards the closed rectangular structure, the geotechnical bags 14 and the outer water baffle 12 are used for directly blocking water flow, at the moment, the geotechnical bags 14 can provide stable support for the outer water baffle 12, deformation or inclination of the outer water baffle 12 in the water flow blocking process is avoided, and the stability of the peripheral weir structure 16 is improved.
The auxiliary water baffle 20 is fixed with the main stressed pile 10 through the locking assembly 30 and the sliding adjusting groove 22, when water flow impacts on the peripheral weir structure 16, the peripheral weir structure 16 can transmit force to the inner water baffle 13, when water flow pressure is overlarge, the inner water baffle 13 can deform to influence safety, the auxiliary water baffle 20 is used for being abutted with the inner water baffle 13, the stressed thickness of the auxiliary water baffle 20 and the inner water baffle 13 in the water flow direction can be increased, the upper limit of the force for deforming the auxiliary water baffle 20 and the inner water baffle 13 is increased, the stability of the auxiliary water baffle 20 and the inner water baffle 13 is improved, the construction safety is prevented from being influenced by the stressed deformation of the inner water baffle 13, meanwhile, the position of the auxiliary water baffle 20 can be adjusted by sliding the sliding block 25 in the sliding adjusting groove 22, and the position of the auxiliary water baffle 20 can be adjusted in real time according to the water depth and the river bed excavation depth of the inner side of the closed rectangular structure, and the adjustability of the auxiliary water baffle 20 is improved. The drive portion is through the vertical position of drive butt separation piece 34 to adjust the distance between two joint pieces 36, when the distance between two joint pieces 36 is too big, two joint pieces 36 extend to in fixed joint hole 23 and the activity joint hole 24 respectively this moment, make supplementary breakwater 20 keep away from articulated one end and main atress stake 10 and pass through locking subassembly 30 to be fixed, and supplementary breakwater 20 can keep the support to inboard breakwater 13 for a long time this moment, is favorable to improving the connection stability of inboard breakwater 13 and supplementary breakwater 20. The threaded rod 35 can drive the threaded block 33 to slide in the sliding cavity 32 through threaded connection with the threaded block 33 in the rotating process, and the position of the abutting and separating block 34 can be adjusted at the moment due to the fixed connection of the abutting and separating block 34 and the threaded block 33, so that the purpose of driving the abutting and separating block 34 in real time is achieved, and the driving structure is simple and easy to operate.
When the auxiliary water baffle 20 moves to a position close to the river bed, the water level or the height of the river bed on the inner side of the closed rectangular structure is reduced, the force transferred to the main stress pile 10 through the peripheral weir structure 16, the inner water baffle 13 and the auxiliary water baffle 20 is increased, and one end of the expansion stress rod 21, which faces the river bed, is pointed, so that the expansion stress rod 21 can be more smooth when being inserted into the river bed. The vertical movement of the stress rod 21 is expanded and inserted into a deeper riverbed, so that the tilting resistance of the main stress pile 10 can be improved, the stability of the main stress pile 10 is improved, the stability of the whole structure is improved, and the construction safety is guaranteed.
When the abutting separating block 34 moves in the direction away from the clamping block 36, the two clamping blocks 36 can be pulled in the direction close to each other through the elastic force of the connecting spring 38, so that the two clamping blocks 36 are separated from the fixed clamping hole 23 and the movable clamping hole 24 respectively, the auxiliary water baffle 20 can turn over along the hinged position, when the auxiliary water baffle 20 turns over and is in parallel abutting connection with the bottom of the river bed inside the closed rectangular structure (as shown in fig. 4), the two opposite auxiliary water baffles 20 shield the river bed surface inside the closed rectangular structure, and due to softer river bed texture, the pressure intensity received by the unit area of the river bed can be reduced through shielding the river bed surface by the auxiliary water baffle 20, so that objects and instruments with larger weight can be temporarily moved or stored on the surface of the river bed, and the convenience of construction on the inner side of the closed rectangular structure is improved. The outward expansion inclined surface 40 can enable the abutting separation block 34 to enter a gap between the two clamping blocks 36 more easily in the process of moving towards the clamping blocks 36, so that the situation that the abutting separation block 34 cannot be inserted into the gap between the clamping blocks 36 due to errors caused by resetting of the clamping blocks 36 after long-time use is avoided, and the use reliability of the locking assembly 30 is improved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but is capable of various changes and modifications without departing from the spirit and scope of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A cofferdam structure, its characterized in that: comprising
The main stress piles (10) are vertically inserted into the river bed, the four main stress piles (10) are arranged, the four main stress piles (10) are respectively positioned at four corners of the rectangle,
the water baffle mounting grooves (15) are arranged on the opposite surfaces of the four main stress piles (10), the extending direction of the water baffle mounting grooves (15) is the same as that of the main stress piles (10),
the inner side water baffles (13) are positioned on opposite sides of the main stress piles (10), the inner side water baffles (13) are provided with four, the two ends of the inner side water baffles (13) facing the main stress piles (10) extend into water baffle mounting grooves (15) of the two main stress piles (10) respectively, the inner side water baffles (13) are in sliding butt joint with the water baffle mounting grooves (15) and are sealed at the butt joint positions, the four inner side water baffles (13) and the four main stress piles (10) form a closed rectangular structure together,
the peripheral weir structure (16) is arranged outside the closed rectangular structure, the peripheral weir structure (16) is connected with the main stress pile (10),
wherein the peripheral weir structure (16), the main stress pile (10) and the inner water baffle (13) form a water baffle structure together to prevent water flow from entering the inner side of the closed rectangular structure,
the peripheral weir structure (16) comprises
Auxiliary stress piles (11) are vertically inserted into the river bed, the auxiliary stress piles (11) are provided with a plurality of auxiliary stress piles (11) which are distributed on the outer side of the closed rectangular structure in an arc shape, the arc-shaped protruding ends of the auxiliary stress piles (11) face to one side far away from the closed rectangular structure, the auxiliary stress piles (11) close to the main stress piles (10) are fixedly connected with the outer side walls of the main stress piles (10),
an outer water baffle (12), wherein the outer water baffle (12) is vertically inserted into a riverbed, the outer water baffle (12) is sleeved outside the adjacent auxiliary stress piles (11), the main stress piles (10), the auxiliary stress piles (11), the outer water baffle (12) and the inner water baffle (13) are surrounded to form a closed supporting structure,
geotechnical bags (14) are stacked in the closed supporting structure, the geotechnical bags (14) fully fill the inner side of the closed supporting structure,
the inner side of the closed rectangular structure is provided with a reinforcing device, and the reinforcing device comprises
The sliding adjusting groove (22) is arranged on the opposite surface of the adjacent main stress pile (10), the extending direction of the sliding adjusting groove (22) is the same as that of the water baffle mounting groove (15),
a sliding block (25) which is arranged in the sliding adjusting groove (22) in a sliding way,
one end of the auxiliary water baffle (20) is hinged with two sliding blocks (25) which are oppositely arranged, the other end of the auxiliary water baffle (20) is in a movable state,
a vertical reinforcement provided on a side of the slider (25) facing the river bed,
the locking component (30) is detachably arranged in the sliding adjusting groove (22),
wherein, locking subassembly (30) are with supplementary breakwater (20) and main atress stake (10) fixed connection through the mode of joint, and vertical reinforcement consolidates main atress stake (10) through the mode of direct insertion riverbed.
2. A cofferdam structure as in claim 1, wherein: the vertical reinforcement comprises an expansion stress rod (21), the expansion stress rod (21) is arranged in the sliding adjusting groove (22), the expansion stress rod (21) slides along the extending direction of the sliding adjusting groove (22), one end, facing the river bed, of the sliding adjusting groove (22) is provided with an opening, and the expansion stress rod (21) extends outwards from the opening of the sliding adjusting groove (22).
3. A cofferdam structure as in claim 1, wherein: the locking component (30) comprises a fixed clamping hole (23) which is arranged on the opposite surface of the sliding adjusting groove (22), the extending direction of the fixed clamping hole (23) is vertical to the sliding adjusting groove (22),
a movable clamping hole (24) arranged on one side surface of the auxiliary water baffle (20) facing the sliding adjusting groove (22), the extending direction of the movable clamping hole (24) is the same as that of the fixed clamping hole (23),
a connecting block (31) which is arranged in the sliding adjusting groove (22) in a sliding way along the extending direction of the sliding adjusting groove (22),
a sliding cavity (32) arranged in the connecting block (31), the extending direction of the sliding cavity (32) is the same as that of the connecting block (31),
an abutting and separating block (34) which is slidably arranged in the abutting and separating block (34) along the extending direction of the sliding cavity (32),
the clamping blocks (36) are arranged on one side of the sliding cavity (32) close to the river bed, two clamping blocks (36) are arranged, the two clamping blocks (36) respectively slide towards the directions of the fixed clamping holes (23) and the movable clamping holes (24) in the sliding cavity (32), the end parts of the two clamping blocks (36) can penetrate through the connecting block (31) and respectively extend into the fixed clamping holes (23) and the movable clamping holes (24),
and a driving part which is arranged on one side of the abutting and separating block (34) away from the clamping block (36) and is used for driving the abutting and separating block (34) to slide in the sliding cavity (32).
4. A cofferdam structure as claimed in claim 3, wherein: the opposite surfaces of the clamping blocks (36) are provided with connecting cavities (37), connecting springs (38) are arranged in the connecting cavities (37), and two ends of each connecting spring (38) are fixedly connected with the two clamping blocks (36) respectively.
5. A cofferdam structure as claimed in claim 3, wherein: the driving part comprises
A thread block (33) fixedly connected with the abutting separation block (34), the thread block (33) is arranged in the sliding cavity (32) in a sliding way along the extending direction of the sliding cavity (32),
the axial direction of the threaded rod (35) is the same as the extending direction of the sliding cavity (32), one end of the threaded rod (35) extends into the threaded block (33) to be in threaded connection with the threaded block (33), and one end of the threaded rod (35) away from the threaded block (33) penetrates through the connecting block (31) to extend to the outer side of the connecting block (31).
6. A cofferdam structure as claimed in claim 3, wherein: one side of the clamping block (36) facing the abutting separation block (34) is an outward expansion inclined surface (40), the outward expansion inclined surface (40) inclines towards the sliding direction of the clamping block (36), and one end of the abutting separation block (34) facing the clamping block (36) is an inward contraction inclined surface (41) parallel to the outward expansion inclined surface (40).
7. A cofferdam structure as in claim 1, wherein: one end of the main stress pile (10) inserted into the river bed is in a conical shape, and one end of the inner water baffle (13) and the expansion stress rod (21) facing the river bed is in a tip furling shape.
8. A method of constructing a cofferdam structure in accordance with any one of claims 1 to 7, wherein: the construction method comprises the following steps:
s1: the four main stress piles (10) are sequentially hoisted by using a crane, and then the main stress piles (10) are vertically inserted into a river bed, so that the ends of the main stress piles (10) are completely immersed in the river bed, and the four main stress piles (10) are respectively positioned at four rectangular corners during hoisting;
s2: an inner water baffle (13) is inserted into the opposite side of the adjacent main stress pile (10), the inner water baffle (13) extends into the water baffle installation groove (15) towards the end of the main stress pile (10), the inner water baffle (13) is inserted into the river bed towards one end of the river bed,
s3: lifting a plurality of auxiliary stress piles (11) by using a crane, and vertically inserting the auxiliary stress piles (11) into a river bed to enable the auxiliary stress piles (11) to form arc distribution;
s4: sleeving the outer water baffle (12) on the adjacent auxiliary stress pile (11), and inserting the end part of the outer water baffle (12) into the river bed along the axial direction of the auxiliary stress pile (11);
s5: lifting the geotechnical bags (14) by using a crane, and then stacking and placing the geotechnical bags inside a closed supporting structure;
s6: and pumping out the water in the closed rectangular structure by using a water pump.
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| CN202310027148.3A CN115949082B (en) | 2023-01-09 | 2023-01-09 | Cofferdam structure and construction method thereof |
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| CN116290005B (en) * | 2023-05-15 | 2023-07-14 | 山东省路桥集团有限公司 | Highway bridge construction cofferdam device |
| CN117702683B (en) * | 2023-12-19 | 2024-05-31 | 浙江江南春建设集团有限公司 | Bank protection construction method based on cofferdam |
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| CN110616726A (en) * | 2019-09-18 | 2019-12-27 | 四川锦信建筑工程有限公司 | Water retaining cofferdam structure and construction process thereof |
| CN111894019A (en) * | 2020-07-23 | 2020-11-06 | 陕西闹闹馨馨知识产权服务有限公司 | Cofferdam for hydraulic and hydroelectric engineering construction and working method thereof |
| CN212077986U (en) * | 2019-12-25 | 2020-12-04 | 陆建新 | Water conservancy construction cofferdam device |
| CN215518832U (en) * | 2021-07-30 | 2022-01-14 | 李泽峰 | Riverbed type bridge bearing platform foundation pit seepage-proofing cofferdam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100232878A1 (en) * | 2009-03-10 | 2010-09-16 | Vitaly Boris Feygin | Universal Framed Cofferdam |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616726A (en) * | 2019-09-18 | 2019-12-27 | 四川锦信建筑工程有限公司 | Water retaining cofferdam structure and construction process thereof |
| CN212077986U (en) * | 2019-12-25 | 2020-12-04 | 陆建新 | Water conservancy construction cofferdam device |
| CN111894019A (en) * | 2020-07-23 | 2020-11-06 | 陕西闹闹馨馨知识产权服务有限公司 | Cofferdam for hydraulic and hydroelectric engineering construction and working method thereof |
| CN215518832U (en) * | 2021-07-30 | 2022-01-14 | 李泽峰 | Riverbed type bridge bearing platform foundation pit seepage-proofing cofferdam |
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