CN116065611B - Construction method for preventing centralized leakage of cofferdam - Google Patents
Construction method for preventing centralized leakage of cofferdam Download PDFInfo
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- CN116065611B CN116065611B CN202310103230.XA CN202310103230A CN116065611B CN 116065611 B CN116065611 B CN 116065611B CN 202310103230 A CN202310103230 A CN 202310103230A CN 116065611 B CN116065611 B CN 116065611B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
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- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
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Abstract
The application relates to a construction method for preventing concentrated leakage of a cofferdam, and relates to the technical field of cofferdam construction. Which comprises the following steps: s1: establishing a measurement control point and a construction mark; s2: filling earthwork; s3: paving the composite geomembrane on the upstream surface to finish the construction of the cofferdam body; s4: reinforcing the cofferdam body; s5: and constructing a reverse filtering layer on the back water surface side of the cofferdam body. The application has the effect of improving the stability of the cofferdam body.
Description
Technical Field
The application relates to the field of cofferdam construction, in particular to a construction method for preventing centralized leakage of a cofferdam.
Background
The cofferdam is a temporary enclosure structure built for building permanent water conservancy facilities. The water and soil are prevented from entering the building construction position, so that water is drained in the cofferdam, a foundation pit is excavated, and the building is constructed.
However, at present, most of temporarily constructed cofferdams are soil cofferdams, and generally, nearby earthwork is selected, and filling and compaction are performed, so that under the conditions of long-term water seepage and water wave impact on the upstream surface, the stability of the soil cofferdams is poor, collapse is easy to occur, and construction cannot be continued in the soil cofferdams, so that improvement is needed.
Disclosure of Invention
In order to solve the problems that under the conditions of long-term water seepage and water wave impact on an upstream surface, the stability of an earth cofferdam is poor, so that collapse is easy to occur and the construction cannot be continued in the earth cofferdam, the application provides a construction method for preventing concentrated leakage of the cofferdam.
The application provides a construction method for preventing centralized leakage of a cofferdam, which adopts the following technical scheme:
a construction method for preventing centralized leakage of cofferdam comprises the following steps:
s1: establishing a measurement control point and a construction mark;
s2: filling earthwork;
s2.1: throwing filling materials into the river until the filling materials are higher than the river water level so as to form a bank slope;
s2.2: clearing dregs on a bank slope;
s2.3: layering, filling and compacting clay;
s2.4: growing the clay paving length of the bank slope;
s3: paving the composite geomembrane on the upstream surface to finish the construction of the cofferdam body;
s4: reinforcing the cofferdam body;
s5: and constructing a reverse filtering layer on the back water surface side of the cofferdam body.
By adopting the technical scheme, before the layered filling compaction, the dregs on the bank slope are further cleaned, so that the clay can be better adhered to the bank slope, and the stability of the cofferdam body can be improved; in addition, the clay covering length of the bank slope is increased, so that the seepage diameter can be prolonged, seepage is not easy to quickly leak to the back water surface side, the stability of the cofferdam body can be further improved, and the subsequent construction in the cofferdam body can be stably performed.
Optionally, the specific steps of the step S4 are:
s4.1: clay is filled into a geotechnical bag, the geotechnical bag is filled into a woven bag, and a hemp rope or a binding wire is used for binding the bag mouth;
s4.2: the woven bags are thrown into water in a layering manner in a downhill sliding manner, the upper layer and the lower layer are staggered, stacked in order, and synchronously vibrated;
s4.3: after the cofferdam body discharges water, the woven bags are evenly and tightly layered and staggered and tiled, and are manually compacted.
Through adopting above-mentioned technical scheme, can consolidate cofferdam body to the impact that the upstream face side of cofferdam body encountered with the water wave is beaten down, is difficult for taking place to collapse.
Optionally, the inverse filtering layer with the height of cofferdam body is from bottom to top including fragment of brick layer, coarse sand layer, little stone layer, big stone layer and stone layer in proper order.
By adopting the technical scheme, when large-area piping occurs in the cofferdam, the reverse filtering layer can reduce the flow velocity of water gushing, prevent the loss of mud and sand of the foundation and stabilize dangerous situations.
Optionally, the cofferdam body is inside and be close to one side of upstream face is provided with the water catch bowl, lay plastic film in the water catch bowl, the cofferdam body is inside with be provided with drainage assembly between the plastic film.
By adopting the technical scheme, the drainage assembly can drain the water seepage which leaks to the plastic film, so that the water seepage is not easy to permeate to the back surface side.
Optionally, the drainage subassembly includes main water pipe, distributive pipe and connecting cylinder, the last water leakage hole that has run through of plastic film, connecting cylinder one end with water leakage hole intercommunication, the other end through locking subassembly with the distributive pipe is connected, main water pipe and distributive pipe are all buried in the cofferdam body just the distributive pipe with main water pipe is linked together.
Through adopting above-mentioned technical scheme, after infiltration seepage to plastic film, the infiltration flows through leak hole, connecting cylinder and shunt tubes in proper order, flows to main water pipe by the shunt tubes again to carry out the drainage, thereby make the infiltration difficult infiltration to the back surface side any more, in order to improve cofferdam body's stability and be difficult for leading to collapsing because of the infiltration is too much.
Optionally, the locking subassembly includes lantern ring, connecting rod, locking pole, locking spring and stay cord, the fixed cover of lantern ring is located on the connecting cylinder, the annular has been seted up to the end wall of shunt tube just the inserting hole has been seted up to the tank bottom of annular, the locking hole has been seted up to the inner wall in inserting hole, the lantern ring insert to in the annular, the connecting rod with the lantern ring is fixed and has been seted up the accommodation hole, locking pole one end insert to in the accommodation hole, the other end insert to in the locking hole, locking spring connect in the locking pole with between the hole bottom in accommodation hole, stay cord one end with the locking pole is connected, the other end runs through to the top of lantern ring, the connecting rod insert to in the inserting hole.
Through adopting above-mentioned technical scheme, during the dismantlement, pulling stay cord to pull back the locking lever to the holding downthehole completely, then take out the connecting rod from inserting in establishing the downthehole, can accomplish the separation of connecting cylinder and shunt tubes, thereby be convenient for follow-up demolishment to cofferdam body.
Optionally, a compressing assembly is arranged in the water collecting ditch, the compressing assembly comprises a compressing part and a water stopping part, the compressing part is compressed on the plastic film, and the water stopping part is arranged on the compressing part.
By adopting the technical scheme, the compaction part can compact the plastic film, so that the plastic film is not easy to deviate; the water stopping part can further intercept water seepage, so that the water seepage is not easy to leak to the back surface side, and the cofferdam body collapses.
Optionally, the compacting part includes prefabricated concrete and waterstop, the waterstop is laid on the plastic film, prefabricated concrete compresses tightly on the waterstop, run through on the waterstop and offered the hole of stepping down just the hole of stepping down with the connecting cylinder intercommunication, the waterstop is located on the prefabricated concrete.
By adopting the technical scheme, the prefabricated concrete is orderly piled in the water collecting ditch, and the prefabricated concrete is piled to replace the clay to fill the water collecting ditch so as to compress the plastic film, so that the clay is not easy to enter the main water pipe to cause the blockage of the main water pipe.
Optionally, the water stop part comprises a soil retaining net and a water stop bar, the soil retaining net is fixed in the precast concrete, the water stop bar is arranged in the precast concrete, and the water stop bar is positioned on one side of the soil retaining net, which is close to the water stop belt.
By adopting the technical scheme, the water stop strip can absorb water seepage so that the water seepage is not easy to leak to the back surface side.
Optionally, be provided with coupling assembling on the precast concrete, coupling assembling includes connecting reinforcement and nut, the connecting reinforcement runs through precast concrete just the tip of connecting reinforcement all is provided with the screw thread, nut thread bush is located on the connecting reinforcement and with precast concrete offsets tightly.
By adopting the technical scheme, all the precast concrete is connected into a whole, so that the stability of the precast concrete is improved, and the stability of the cofferdam body is indirectly improved.
In summary, the present application includes at least one of the following beneficial effects:
1. before the layered filling compaction, further cleaning the dregs on the bank slope, so that the clay can be better adhered to the bank slope, and the stability of the cofferdam body can be improved; in addition, the clay covering length of the bank slope is increased, so that the seepage diameter can be prolonged, and seepage is not easy to quickly leak to the back water surface side, and the stability of the cofferdam body can be further improved.
2. When large-area piping occurs in the cofferdam, the reverse filtering layer can reduce the flow velocity of water gushing, prevent the loss of mud and sand of the foundation and stabilize dangerous situations.
3. The water stop strip can absorb water seepage so that the water seepage is not easy to leak to the back surface side.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present application;
FIG. 2 is a schematic diagram of a drain assembly according to an embodiment of the present application;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is an enlarged view at B in FIG. 2;
FIG. 5 is a schematic view of a structure for embodying a hold-down assembly in an embodiment of the application;
fig. 6 is an enlarged view at C in fig. 5.
In the figure: 1. a cofferdam body; 11. a water-facing surface; 12. a back surface; 2. a water collecting ditch; 21. a plastic film; 211. a water leakage hole; 3. a drainage assembly; 31. a main water pipe; 32. a water diversion pipe; 321. a ring groove; 322. inserting holes; 323. a locking hole; 33. a connecting cylinder; 4. a locking assembly; 41. a collar; 42. a connecting rod; 421. an accommodation hole; 43. a locking lever; 44. a locking spring; 5. a pressing part; 51. prefabricating concrete; 511. a water through hole; 52. a water stop; 6. a water stop part; 61. a soil retaining net; 62. a water stop strip; 7. a connection assembly; 71. connecting steel bars; 711. a thread; 72. a nut; 8. a reverse filtration layer; 81. a brick layer; 82. coarse sand layer; 83. a small stone layer; 84. a large stone layer; 85. and (5) a stone layer.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
The embodiment of the application discloses a construction method for preventing concentrated leakage of a cofferdam.
A construction method for preventing centralized leakage of cofferdam comprises the following steps:
s1: and (3) establishing a measurement control point and a construction mark, and determining the axis of the cofferdam body 1 so as to control the construction direction and the weir body construction range. Reserving a construction distance allowance, and ensuring that the cofferdam does not obstruct the construction of a building;
s2: filling earthwork;
s2.1: adopting an occupied method for construction, digging and loading earthwork by an excavator, transporting the earth to a construction site by a dump truck, and throwing filling materials into a river by the excavator until the filling materials are higher than the river water level so as to form a bank slope;
s2.2: clearing dregs on a bank slope;
s2.3: layering, filling and compacting clay;
s2.4: the clay covering length of the bank slope is increased to prolong the seepage diameter;
s3: paving the composite geomembrane on the upstream surface 11 to finish the construction of the cofferdam body 1;
s4: reinforcing the cofferdam body 1;
s4.1: clay is filled into a geotechnical bag, the geotechnical bag is filled into a woven bag, and a hemp rope or a binding wire is used for binding the bag mouth;
s4.2: the woven bags are thrown into water in a layering manner in a downhill sliding manner, the upper layer and the lower layer are staggered, stacked in order, and synchronously vibrated;
s4.3: after the cofferdam body 1 discharges water, the woven bags are uniformly and tightly layered and staggered and tiled, and are manually compacted;
s5: and constructing a reverse filtering layer 8 on the back surface 12 side of the cofferdam body 1.
Referring to fig. 1, the reverse filtering layer 8 sequentially comprises a brick layer 81, a coarse sand layer 82, a small stone layer 83, a large stone layer 84 and a stone layer 85 from bottom to top by the height of the cofferdam body 1, and when large-area piping occurs in the cofferdam body 1, the reverse filtering layer 8 can reduce the flow velocity of water gushing, prevent sediment loss of a foundation and stabilize dangerous situations.
Referring to fig. 2 and 3, a water collecting channel 2 is provided inside the cofferdam body 1 and at a side close to the upstream surface 11, and the water collecting channel 2 is close to the bottom of the cofferdam body 1. The plastic film 21 is laid in the water collecting ditch 2, and the plastic film 21 in the embodiment of the application is composed of two layers, on one hand, the plastic film 21 can block water seepage, and on the other hand, the plastic film is covered on the surface of the clay, so that the water evaporation of the clay can be slowed down, and the time for keeping the viscosity of the clay can be prolonged. The drainage assembly 3 is arranged between the inner part of the cofferdam body 1 and the plastic film 21, and the drainage assembly 3 can drain water seepage leaking to the plastic film 21, so that water seepage is not easy to permeate to the back surface 12 side.
Referring to fig. 3, the drainage assembly 3 includes a main water pipe 31, a water diversion pipe 32, and a connection tube 33, and the main water pipe 31 is buried in the cofferdam body 1 and is located below the side of the water collection channel 2. The top of the plastic film 21 is provided with a water leakage hole 211 in a penetrating way, one end of the connecting cylinder 33 is communicated with the water leakage hole 211, the other end of the connecting cylinder is communicated with the water diversion pipe 32, the water diversion pipe 32 is buried in the cofferdam body 1, and one end, far away from the connecting cylinder 33, of the water diversion pipe 32 is communicated with the main water pipe 31. After the seepage water leaks to the plastic film 21, the seepage water flows through the water leakage holes 211, the connecting cylinder 33 and the water diversion pipe 32 in sequence, and then flows to the main water pipe 31 through the water diversion pipe 32 to drain water, so that the seepage water is not easy to permeate to the back surface 12 side, the stability of the cofferdam body 1 is improved, and collapse is not easy to be caused by excessive seepage water.
Referring to fig. 4, a locking assembly 4 is provided between the connecting tube 33 and the water diversion pipe 32, and when the cofferdam body 1 needs to be removed, the locking assembly 4 can conveniently separate the connecting tube 33 from the water diversion pipe 32. The locking assembly 4 comprises a lantern ring 41, a connecting rod 42, a locking rod 43, a locking spring 44 and a pull rope 45, wherein the lantern ring 41 is fixedly sleeved at one end of the connecting cylinder 33, which is far away from the plastic film 21, the end wall of the water diversion pipe 32, which is far away from one end of the main water pipe 31, is provided with a ring groove 321, the bottom of the ring groove 321 is provided with an inserting hole 322, and the inner wall of the inserting hole 322 is provided with a locking hole 323.
The connecting rod 42 is fixedly connected with one side of the collar 41 facing away from the plastic film 21, the collar 41 is adapted to be inserted into the annular groove 321, and the connecting rod 42 is adapted to be inserted into the insertion hole 322. The side wall of the connecting rod 42 is provided with a containing hole 421, the containing hole 421 is coaxial with the locking hole 323, one end of the locking rod 43 is inserted into the containing hole 421, the other end of the locking rod 43 is inserted into the locking hole 323, one end of the locking spring 44 is fixed with one end of the locking rod 43 in the containing hole 421, the other end of the locking spring is fixed with the bottom of the containing hole 421, and the locking spring 44 can automatically push the locking rod 43 into the locking hole 323 through elasticity.
Referring to fig. 4, one end of the pull cord 45 is fixed to one end of the locking rod 43 located in the accommodating hole 421, and the other end penetrates through the top wall of the collar 41, so that the pull cord 45 can conveniently pull the locking rod 43 back into the accommodating hole 421, thereby facilitating the disassembly of the connecting tube 33 and the water distribution pipe 32. When in installation, the locking rod 43 is pulled back into the accommodating hole 421 completely, and then the connecting rod 42 is inserted into the inserting hole 322; until the accommodating hole 421 and the locking hole 323 are coaxial, the locking rod 43 is automatically inserted into the locking hole 323 by the elastic force of the locking spring 44, so that the connection between the connecting cylinder 33 and the water diversion pipe 32 is completed;
when the cofferdam is disassembled, the pull rope 45 is pulled to completely pull the locking rod 43 back into the accommodating hole 421, and then the connecting rod 42 is taken out from the inserting hole 322, so that the connecting cylinder 33 and the water diversion pipe 32 can be separated, and the cofferdam body 1 can be conveniently disassembled later.
Referring to fig. 5 and 6, a compression assembly is arranged in the water collecting ditch 2, the compression assembly comprises a compression part 5 and a water stopping part 6, the compression part 5 is compressed on the plastic film 21 and is positioned in the water collecting ditch 2, and the compression part 5 can compress the plastic film 21, so that the plastic film 21 is not easy to deviate; the water stopping part 6 is arranged on the pressing part 5, and the water stopping part 6 can further intercept water seepage, so that the water seepage is more difficult to leak to the side of the back surface 12 to cause the collapse of the cofferdam body 1.
Referring to fig. 6, the compacting part 5 includes a precast concrete 51 and a water stop 52, the precast concrete 51 is square and hollow, the precast concrete 51 is neatly piled up in the water collecting channel 2, and the plastic film 21 is compacted by piling up the precast concrete 51 instead of filling the water collecting channel 2 with clay, so that the clay is not easy to enter the main water pipe 31 to cause the blockage of the main water pipe 31; and the bottom wall of the precast concrete 51 positioned at the bottom of the water collecting channel 2 is provided with a cushion block, so that a gap is not reserved between the precast concrete 51 and the bottom of the water collecting channel 2. The water stop 52 is made of rubber materials, the water stop 52 is paved on one side of the plastic film 21, which is close to the precast concrete 51, and the precast concrete 51 is piled on the water stop 52, the water stop 52 is provided with a yielding hole in a penetrating mode, the yielding hole is communicated with the connecting cylinder 33, on one hand, the water stop 52 has the water retaining effect, so that water seepage is not easy to leak to the side of the back surface 12, on the other hand, the precast concrete 51 is not in direct contact with the plastic film 21, and damage to the plastic film 21 is not easy to occur.
Referring to fig. 6, furthermore, the precast concrete 51 of a single row and a single column is provided with a connection assembly 7, and the connection assembly 7 includes connection bars 71 and nuts 72, and the connection bars 71 penetrate the precast concrete 51 of a corresponding single row or single column, respectively. The screw threads 711 are arranged at the two ends of the connecting steel bars 71, and the nuts 72 are sleeved at the end parts of the connecting steel bars 71 through the screw threads 711 and are abutted against the precast concrete 51, so that all the precast concrete 51 are connected into a whole, the stacking stability of the precast concrete 51 is improved, and the stability of the cofferdam body 1 is indirectly improved.
Specifically, the side wall of the precast concrete 51 is provided with water holes 511 in a penetrating manner, and the water holes 511 on adjacent precast concrete 51 are coaxial, and the water holes 511 can guide the water seepage of the precast concrete 51 to the bottom of the water collecting ditch 2 so as to flow into the main water pipe 31 and be discharged.
Referring to fig. 6, the water stop portion 6 includes a soil blocking net 61 and a water stop bar 62, the water stop bar 62 is stuffed into the precast concrete 51, and the water stop bar 62 can absorb water seepage so that the water seepage is not liable to leak to the back surface 12 side; and the precast concrete 51 leaves a space to allow the water stop bars 62 to expand without affecting the layout of surrounding structures. The retaining net 61 is fixed in the precast concrete 51 and is positioned at one side of the water stop 62 away from the water stop 52, and the retaining net 61 can separate clay filled subsequently, so that the clay is not easy to enter the precast concrete 51 to influence the arrangement of the water stop 62.
The implementation principle of the construction method for preventing centralized leakage of the cofferdam provided by the embodiment of the application is as follows: after the seepage water leaks to the plastic film 21, the seepage water flows through the water leakage holes 211, the connecting cylinder 33 and the water diversion pipe 32 in sequence, and then flows to the main water pipe 31 through the water diversion pipe 32 to drain water, so that the seepage water is not easy to permeate to the back surface 12 side, the stability of the cofferdam body 1 is improved, and collapse is not easy to be caused by excessive seepage water.
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 (5)
1. A construction method for preventing centralized leakage of cofferdam is characterized in that: the method comprises the following steps:
s1: establishing a measurement control point and a construction mark;
s2: filling earthwork;
s2.1: throwing filling materials into the river until the filling materials are higher than the river water level so as to form a bank slope;
s2.2: clearing dregs on a bank slope;
s2.3: layering, filling and compacting clay;
s2.4: growing the clay paving length of the bank slope;
s3: paving the composite geomembrane on a water facing surface (11) to finish the construction of the cofferdam body (1);
s4: reinforcing the cofferdam body (1);
s4.1: clay is filled into a geotechnical bag, the geotechnical bag is filled into a woven bag, and a hemp rope or a binding wire is used for binding the bag mouth;
s4.2: the woven bags are thrown into water in a layering manner in a downhill sliding manner, the upper layer and the lower layer are staggered, stacked in order, and synchronously vibrated;
s4.3: after the cofferdam body (1) discharges water, the woven bags are uniformly and tightly layered, staggered and tiled, and are manually stepped on;
s5: a reverse filtering layer (8) is built on the back surface (12) side of the cofferdam body (1);
the inverted filter (8) sequentially comprises a brick layer (81), a coarse sand layer (82), a small stone layer (83), a large stone layer (84) and a stone layer (85) from bottom to top at the height of the cofferdam body (1);
a water collecting ditch (2) is formed in the cofferdam body (1) and close to one side of the water facing surface (11), a plastic film (21) is paved in the water collecting ditch (2), and a drainage component (3) is arranged between the interior of the cofferdam body (1) and the plastic film (21);
the drainage assembly (3) comprises a main water pipe (31), a water diversion pipe (32) and a connecting cylinder (33), wherein a water leakage hole (211) is formed in the plastic film (21) in a penetrating mode, one end of the connecting cylinder (33) is communicated with the water leakage hole (211), the other end of the connecting cylinder is connected with the water diversion pipe (32) through a locking assembly (4), the main water pipe (31) and the water diversion pipe (32) are buried in the cofferdam body (1), and the water diversion pipe (32) is communicated with the main water pipe (31);
the utility model provides a locking subassembly (4) is including lantern ring (41), connecting rod (42), locking lever (43), locking spring (44) and stay cord (45), lantern ring (41) fixed cover is located on connecting cylinder (33), annular (321) just annular (321) have been seted up to the end wall of shunt tube (32) the tank bottom of annular (321) has been seted up and has been set up hole (322), locking hole (323) have been seted up to the inner wall of inserting hole (322), lantern ring (41) insert establish to in annular (321), connecting rod (42) with lantern ring (41) are fixed and have been seted up accommodation hole (421), locking lever (43) one end insert to in accommodation hole (421), the other end insert to in locking hole (323), locking spring (44) connect in locking lever (43) with between the hole bottom of accommodation hole (421), stay cord (45) one end with locking lever (43) are connected, the other end runs through to connecting rod (41) insert into in establishing hole (322).
2. The construction method for preventing concentrated leakage of cofferdam according to claim 1, which is characterized in that: the water collecting ditch (2) is internally provided with a compression assembly, the compression assembly comprises a compression part (5) and a water stopping part (6), the compression part (5) is compressed on the plastic film (21), and the water stopping part (6) is arranged on the compression part (5).
3. The construction method for preventing concentrated leakage of cofferdam according to claim 2, which is characterized in that: the compressing part (5) comprises a precast concrete (51) and a water stop belt (52), the water stop belt (52) is paved on the plastic film (21), the precast concrete (51) is compressed on the water stop belt (52), a yielding hole is formed in the water stop belt (52) in a penetrating mode and is communicated with the connecting cylinder (33), and the water stop part (6) is arranged on the precast concrete (51).
4. A method for constructing a cofferdam for preventing concentrated leakage according to claim 3, which is characterized in that: the water stop part (6) comprises a soil blocking net (61) and water stop strips (62), wherein the soil blocking net (61) is fixed in the precast concrete (51), the water stop strips (62) are arranged in the precast concrete (51), and the water stop strips (62) are positioned on one side, close to the water stop strips (52), of the soil blocking net (61).
5. A method for constructing a cofferdam for preventing concentrated leakage according to claim 3, which is characterized in that: the prefabricated concrete (51) is provided with a connecting component (7), the connecting component (7) comprises a connecting steel bar (71) and a nut (72), the connecting steel bar (71) penetrates through the prefabricated concrete (51) and threads (711) are arranged at the end part of the connecting steel bar (71), and the nut (72) is sleeved on the connecting steel bar (71) and is abutted against the prefabricated concrete (51).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310103230.XA CN116065611B (en) | 2023-02-06 | 2023-02-06 | Construction method for preventing centralized leakage of cofferdam |
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| CN202310103230.XA CN116065611B (en) | 2023-02-06 | 2023-02-06 | Construction method for preventing centralized leakage of cofferdam |
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| CN116065611B true CN116065611B (en) | 2023-09-26 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4588804B1 (en) * | 2010-04-28 | 2010-12-01 | 鹿島建設株式会社 | Temporary cut-off method, temporary cut-off structure |
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| CN212427150U (en) * | 2020-05-12 | 2021-01-29 | 浙江海逸环科院有限公司 | Overseas side cofferdam structure |
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| CN115341561A (en) * | 2022-08-23 | 2022-11-15 | 深圳市市政工程总公司 | Water area cofferdam construction method |
| CN115450236A (en) * | 2022-09-15 | 2022-12-09 | 中国葛洲坝集团国际工程有限公司 | Cofferdam anti-seepage structure and construction method thereof |
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2023
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| CN212427150U (en) * | 2020-05-12 | 2021-01-29 | 浙江海逸环科院有限公司 | Overseas side cofferdam structure |
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| CN115341561A (en) * | 2022-08-23 | 2022-11-15 | 深圳市市政工程总公司 | Water area cofferdam construction method |
| CN115324122A (en) * | 2022-08-30 | 2022-11-11 | 海通建设集团有限公司 | Mechanical expanding type anti-floating anchor rod |
| CN115450236A (en) * | 2022-09-15 | 2022-12-09 | 中国葛洲坝集团国际工程有限公司 | Cofferdam anti-seepage structure and construction method thereof |
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| CN116065611A (en) | 2023-05-05 |
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