CN217811147U - Sand filling pipe bag paving combined double-layer lock catch steel pipe pile seepage-proofing drainage system - Google Patents

Abstract

The utility model discloses a sand-filled pipe bag paving combined double-layer lock catch steel pipe pile seepage-proofing drainage system, which consists of a sand-filled pipe bag, a lock catch steel pipe pile double-layer seepage-proofing wall, a drainage system and a cofferdam base reinforcing layer; the reinforcing layer of the cofferdam base is sequentially provided with a large stone layer, a coarse gravel layer and a geogrid from bottom to top, wherein the large stone layer, the coarse gravel layer and the geogrid are formed after river bottom sludge is replaced; sand filling pipe bags are sequentially stacked above the geogrids to form slope surfaces on two sides of the cofferdam, sand is filled between the sand filling pipe bags on the two sides, and a weir crest pavement is arranged at the top of the cofferdam formed by the sand filling pipe bags; the drainage system comprises a prefabricated drainage well, a water suction pump, a drainage pipe and a water suction pipe. Fill sand tube bag cofferdam domatic and be equipped with prevention of seepage bank protection, combine double-deck hasp steel-pipe pile cut-off wall structure, be equipped with prefabricated drainage well between the steel-pipe pile cut-off wall, the cofferdam whole forms the system that collects manger plate, prevention of seepage, drainage function as an organic whole, effectively resists coastal area stormy waves effect, guarantees cofferdam structure's safety and stability.

Description

Sand filling pipe bag paving combined double-layer lock catch steel pipe pile seepage-proofing drainage system

Technical Field

The utility model relates to a sand tube bag cofferdam construction technical field is filled to aquatic, concretely relates to fill sand tube bag and pave and combine double-deck hasp steel-pipe pile prevention of seepage drainage system.

Background

The construction of underwater engineering often involves a large amount of cofferdams, and along with the gradual increase of the engineering scale, and the construction process is easily influenced by the outside nature, the traditional cofferdams such as steel sheet pile cofferdams, earth-rock cofferdams and reinforced concrete sheet pile cofferdams can not be well applied. The sand-filled tube bag cofferdam has the characteristics of simple and convenient construction, high degree of mechanization, easy material acquisition, full resource utilization and the like, and is widely applied to the construction of the cofferdam of the hydraulic engineering at present. However, for the foundation of the cofferdam with the deep sludge layer, the sand-filled pipe bag cofferdam is easy to have uneven settlement, so that the pipe bag is pulled to crack and damage to cause water seepage, and the safety and the stability of the cofferdam structure are seriously influenced if remedial measures such as drainage and the like are lacked. The upstream face of the cofferdam needs to bear larger wind waves, the traffic function of the cofferdam top needs to be considered, and higher requirements are provided for the seepage-proofing effect and the structural stability of the sand-filled tube bag cofferdam. Most of the conventional cofferdam seepage-proofing bodies adopt modes of a concrete seepage-proofing wall, a high-pressure jet grouting pile, a cement mixing pile and the like for seepage prevention, so that the requirements on the space of a construction working face and the bearing capacity of a foundation are high, the section type of the cofferdam is complex, the cofferdam is complicated to fill and remove, the construction period is long, and the construction cost is high. Although Larsen steel sheet piles are simple in construction and low in requirement on operation space, the Larsen steel sheet piles are small in rigidity, high in requirement on formation uniformity, difficult to insert and beat steel sheets in complex formations and large in construction verticality control difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at has proposed to fill the problem that exists in the sand tube bag cofferdam prevention of seepage construction to the current, has filled sand tube bag and has spread and combine double-deck hasp steel-pipe pile prevention of seepage drainage system, adopts following technical scheme.

The seepage-proofing and drainage system for the double-layer lock catch steel pipe piles is formed by paving sand filling pipe bags and combining the sand filling pipe bags with the double-layer lock catch steel pipe piles, and consists of a double-layer seepage-proofing wall formed by the lock catch steel pipe piles, a drainage system and a cofferdam base reinforcing layer; the reinforcing layer of the cofferdam base is sequentially provided with a large stone layer, a coarse gravel layer and a geogrid from bottom to top, wherein the large stone layer, the coarse gravel layer and the geogrid are formed after river bottom sludge is replaced; sand filling pipe bags are sequentially stacked above the geogrids to form slope surfaces on two sides of the cofferdam, waterproof geotextile is laid on the slope surface on one side of the upstream surface, reverse filter geotextile is arranged on the slope surface on one side of the downstream surface, slope protection on the upstream surface is arranged on one side of the upstream surface, back surface protection feet are arranged on one side of the downstream surface, sand soil is filled between the sand filling pipe bags on two sides, and a weir crest pavement is arranged at the top of the cofferdam formed by the sand filling pipe bags; the bottom of the double-layer impervious wall extends into the impervious layer 2-3 m, the tops of the lock catch steel pipe piles are provided with capping beams, the height of the capping beam at the top of the lock catch steel pipe pile at the upstream side is flush with the flood prevention design highest water level, the height of the capping beam at the top of the lock catch steel pipe pile at the back side is flush with the construction water level, and clay is filled between the double-layer impervious walls above the construction water level; the drainage system comprises prefabricated drainage wells, a water suction pump, a drainage pipe and a water suction pipe, wherein the prefabricated drainage wells are arranged between the double-layer locking and buckling double-layer impervious walls and are arranged at intervals of 20 to 30m in the longitudinal direction.

Preferably, hasp steel-pipe pile includes steel-pipe pile, C shaped steel, T shaped steel, gusset plate, and C shaped steel, T shaped steel opposite direction weld make in steel-pipe pile both sides, and C shaped steel's opening orientation is for deviating from steel-pipe pile one side, and the gusset plate welds and locates C shaped steel both sides and with steel-pipe pile welded fastening.

Preferably, the bottom of the weir crest pavement is provided with waterproof geotextile, and the weir crest pavement is sequentially provided with a cement stabilized macadam base layer and a concrete layer from bottom to top.

Preferably, the two layers of sand filling pipe bags on the upper part of the geogrid are through long pipe bags.

Preferably, a water suction pump is arranged at the bottom of the prefabricated drainage well, one end of one side of the water suction pipe is connected with the water suction pump, the end of the other side of the water suction pipe is connected with a drainage pipe, and the drainage pipe extends out of the slope surface on one side of the back surface of the sand filling pipe bag.

Preferably, the T-shaped steel of the locking steel pipe pile is clamped in the C-shaped steel lock catch on one side of the connected locking steel pipe pile, and a protective bag is arranged between the C-shaped steel locking opening and the T-shaped steel lock catch and is filled with anti-seepage mortar.

The utility model relates to a technical scheme, the beneficial effect who compares with the conventional art is:

1. adopt CT formula hasp formula steel-pipe pile, processing simple manufacture, quick utilizes the vibratory hammer to insert the hasp steel-pipe pile one by one, removes the C shape steel one side of the preceding CT hasp steel-pipe pile of embedded buckling by the T shaped steel of CT formula hasp steel-pipe pile, and the accuracy of inserting and beating is controlled easily, reduces the construction quality control degree of difficulty, and construction operation intensity is less relatively, and manpower and mechanical equipment occupancy are low, are showing and promote the efficiency of construction.

2. The lock catch type steel pipe pile is large in overall rigidity, good in adaptability to various stratums, high in overall stability, strong in structural waterproof performance, convenient to construct, complete to dismantle, capable of being repeatedly used, low in carbon and environment-friendly, and capable of saving engineering cost, and the piles are connected together through the lock catches and are sealed and reinforced through grouting.

3. The large stones are thrown and filled at the bottom of the cofferdam foundation to extrude deep silt, the coarse gravel is paved, the geogrid is paved, the uneven settlement of the sand filling pipe bags is effectively avoided, the pipe bags are prevented from being cracked, and the overall stability of the cofferdam is improved.

4. The slope surface of the sand-filled pipe bag cofferdam is provided with an anti-seepage slope protection, a double-layer lock catch steel pipe pile anti-seepage wall structure is combined, a prefabricated drainage well is arranged between the steel pipe pile anti-seepage walls, and the cofferdam is integrally formed into a system integrating water retaining, anti-seepage and drainage functions, so that the wind wave action of coastal areas is effectively resisted; the drainage system can drain water for the cofferdam in time in severe weather such as strong wind, heavy rain and the like and in the event of accidents, so that the cofferdam is prevented from further damage, and the safety and stability of the cofferdam structure are ensured to the maximum extent.

Drawings

FIG. 1 is a structural schematic diagram of an anti-seepage drainage system combining sand-filled pipe bag paving and double-layer lock catch steel pipe piles;

FIG. 2 isbase:Sub>A sectional view at A-A of the seepage-proofing and drainage system combining sand-filled pipe bags with double-layer lock catch steel pipe piles;

FIG. 3 is a sectional view at B-B of the anti-seepage drainage system combining sand-filled pipe bag paving and double-layer lock catch steel pipe piles;

FIG. 4 is a schematic view illustrating completion of underwater gravel cushion throwing construction;

FIG. 5 is a schematic view of the completion of the laying construction of the bottom full-length sand-filled pipe bag;

FIG. 6 is a schematic diagram of the completion of the sand-filled pipe bag laying and core sand blow-filling construction;

FIG. 7 is a schematic structural view of a CT lock catch steel pipe pile;

FIG. 8 is an assembly connection schematic diagram of a CT lock catch steel pipe pile;

FIG. 9 is a top view of the assembled and connected CT lock catch steel pipe pile;

FIG. 10 is a schematic view of plugging and water stopping of a locking notch of a CT lock catch steel pipe pile;

FIG. 11 is a schematic view of construction completion of the locking steel pipe pile anti-seepage system;

FIG. 12 is a schematic view of the completion of the installation of a prefabricated drainage well;

FIG. 13 is a schematic view of the completion of the drainage system;

FIG. 14 is an enlarged schematic view of a drainage system;

fig. 15 is a schematic view showing the completion of slope protection construction;

fig. 16 is a schematic view of the completion of the construction of the pavement on the top of the weir crest.

The figure is marked with: 1-sand filling pipe bag, 2-impermeable layer, 3-permeable layer, 4-big stone layer, 5-coarse sand stone layer, 6-upstream slope protection, 7-downstream foot protection, 8-waterproof geotextile, 9-sandy soil, 10-capping beam, 11-prefabricated drainage well, 12-water pump, 13-drainage pipe, 14-water pumping pipe, 15-clay, 16-locking steel pipe pile, 1602-C shaped steel, 1603-T shaped steel, 1604-reinforcing plate, 17-geogrid, 18-protective bag, 19-leakage-proof mortar, 20-cofferdam outside, 21-cofferdam inside, 22-weir top pavement, 2201-cement stabilized macadam base layer, 2202-concrete layer, 23-flood prevention design highest water level, 24-construction, 25-low water level, 26-reverse filter geotextile.

Detailed Description

In order to deepen understanding of the present invention, the embodiments of the present invention will be described in detail below with reference to fig. 1 to 16, and the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments are given, but the scope of protection of the present invention is not limited to the following embodiments.

In the embodiment, the highest flood prevention water level is designed according to the flood meeting level of 10 years, the cofferdam adopts a double-prism cofferdam, the centers of the prisms of the upper side tube bag and the lower side tube bag are backfilled by adopting blown sand, sand filling tube bags with the slope ratio of 1: 0.5,1: 1.8-1: 2.0 are arranged at the inner side and the outer side, and a 120kN/m geogrid is additionally arranged at the bottom surface of the cofferdam; the bottom layer of the cofferdam is provided with 2 layers of through long pipe bags. The width of the top of the cofferdam is 8m, waterproof geotextile is paved on the top of the tube bag, and then a cement stabilized macadam base layer with the thickness of 20cm and the thickness of 5% and C20 concrete with the thickness of 20cm are paved. The lock catch steel pipe pile members are made of Q235 materials, and a mode that half of phi 160 multiplied by 10 steel pipes and half of 16-size I-shaped steel pipes are welded in the steel pipes is adopted.

With reference to the attached figure 4, the silt of the river bottom permeable layer 3 is cleaned, the boulders 4 are cast and filled for silt squeezing, then a coarse gravel layer 5 is paved, a geogrid 17 is paved above the coarse gravel layer 5,

with reference to fig. 5 and 6, two layers of through-length sand filling pipe bags 1 are laid above the geogrid 17, then the sand filling pipe bags 1 are sequentially stacked to form slope surfaces on two sides of the cofferdam, the underwater part of each sand filling pipe bag 1 is laid in a direction parallel to the water flow direction, the above-water part of each sand filling pipe bag is laid in a direction perpendicular to the water flow direction, and sand 9 is filled between the sand filling pipe bags 1 on two sides.

Referring to fig. 7, the locked steel pipe pile 16 includes a steel pipe pile 1601, C-shaped steel 1602, T-shaped steel 1603, reinforcing plates 1604, the C-shaped steel 1602 and the T-shaped steel 1603 are oppositely welded to two sides of the steel pipe pile 1601, an opening of the C-shaped steel 1602 faces away from the steel pipe pile 1601, and the reinforcing plates 1604 are welded to two sides of the C-shaped steel 1602 and are welded to the steel pipe pile 1601.

Referring to fig. 8, 9 and 10, T-section steel 1603 of the locking steel-pipe pile 16 is clamped in a C-section steel 1602 lock at one side of the locking steel-pipe pile 16, and a protective bag 18 is arranged between a locking opening of the C-section steel 1602 and the T-section steel 1603 lock and is filled with anti-leakage mortar 19.

Referring to the attached drawing 11, the bottom of the double-layer impervious wall formed by the lock catch steel pipe piles 16 extends into the impervious layers 2-3 m, the top of each lock catch steel pipe pile 16 is provided with a capping beam 10, the height of the capping beam 10 at the top of the lock catch steel pipe pile 16 on the upstream side is flush with the flood prevention design maximum water level 23, and the height of the capping beam 10 at the top of the lock catch steel pipe pile 16 on the downstream side is flush with the construction water level 24.

Referring to the attached drawings 12, 13 and 14, grooves are excavated at intervals of 20 to 30m in the longitudinal direction between the double-layer impervious walls, prefabricated drainage wells are installed, a water suction pump 12 is arranged at the bottom of each prefabricated drainage well 11, one end of each water suction pipe 14 is connected with the water suction pump 12, the other end of each water suction pipe is connected with a drainage pipe 13, and the drainage pipe 13 extends out of the slope surface on the back side of the sand filling pipe bag 1. And filling clay 15 between the double-layer impervious walls above the construction water level 24, and stacking the sand filling pipe bags 1 to the designed weir crest height.

With reference to fig. 15, waterproof geotextile 8 is laid on the upstream slope, reverse filter geotextile 26 is laid on the downstream slope, upstream slope protection 6 is constructed on the upstream side, and back protection feet 7 are constructed on the downstream side.

With reference to the attached drawing 16, the sand filling pipe bag 1 at the top of the cofferdam is paved with waterproof geotextile 8, and then a cement stabilized macadam base layer 2201 with the thickness of 20cm and the thickness of C20 concrete 2202 with the thickness of 20cm and the thickness of 5 percent are paved.

The above embodiments are only used for explaining the technical idea of the present invention, not for the limitation of the protection of the right of the present invention, and all the modifications that are insubstantial to the present invention are carried out by using this idea, all fall into the protection scope of the present invention.

Claims (6)

1. The seepage-proofing and drainage system combining sand-filled pipe bags with double-layer lock catch steel pipe piles in a paving mode is characterized by comprising a double-layer seepage-proofing wall formed by the sand-filled pipe bags (1) and the lock catch steel pipe piles (16), a drainage system and a cofferdam base reinforcing layer; the reinforcing layer of the cofferdam base is sequentially provided with a large stone layer (4), a coarse gravel layer (5) and a geogrid (17) from bottom to top, wherein the large stone layer is formed after river bottom sludge is replaced; sand filling pipe bags (1) are sequentially stacked above the geogrid (17) to form slope surfaces on two sides of the cofferdam, waterproof geotextile (8) is laid on the slope surface on the upstream side, reverse filter geotextile (26) is arranged on the slope surface on the downstream side, an upstream slope protection (6) is arranged on the upstream side, a downstream protection foot (7) is arranged on the downstream side, sand soil (9) is filled between the sand filling pipe bags (1) on two sides, and a weir crest pavement (22) is arranged at the top of the cofferdam formed by the sand filling pipe bags (1); the bottom of the double-layer impervious wall extends into the impervious layer (2) 2-3 m, top capping beams (10) are arranged at the tops of the locking steel pipe piles (16), the top capping beams (10) at the top of the locking steel pipe piles (16) on the upstream side are flush with the flood prevention design highest water level (23), the top capping beams (10) at the top of the locking steel pipe piles (16) on the back water side are flush with the construction water level (24), and clay (15) is filled between the double-layer impervious walls above the construction water level (24); the drainage system comprises prefabricated drainage wells (11), a water suction pump (12), a drainage pipe (13) and a water suction pipe (14), wherein the prefabricated drainage wells (11) are arranged between the double-layer impervious walls, and the prefabricated drainage wells are arranged at intervals of 20-30m in the longitudinal direction.

2. The sand-filled pipe bag paving combined double-layer lock-catch steel pipe pile seepage-proofing and drainage system according to claim 1, wherein the lock-catch steel pipe pile (16) comprises a steel pipe pile (1601), C-shaped steel (1602), T-shaped steel (1603) and a reinforcing plate (1604), the C-shaped steel (1602) and the T-shaped steel (1603) are oppositely welded on two sides of the steel pipe pile (1601), the opening of the C-shaped steel (1602) faces to the side away from the steel pipe pile (1601), and the reinforcing plate (1604) is welded on two sides of the C-shaped steel (1602) and is fixedly welded with the steel pipe pile (1601).

3. The seepage-proofing and drainage system for the steel pipe piles with the double-layer lock catches and built by the sand-filled pipe bags according to claim 1, wherein the bottom of the weir crest pavement (22) is provided with waterproof geotextile (8), and the weir crest pavement (22) is sequentially provided with a cement-stabilized macadam base layer (2201) and a concrete layer (2202) from bottom to top.

4. The seepage-proofing and drainage system for the steel pipe piles with the double-layer lock catches formed by paving the sand-filled pipe bags according to the claim 1, wherein the two layers of the sand-filled pipe bags (1) at the upper part of the geogrid (17) are through long pipe bags.

5. The seepage-proofing drainage system of the steel pipe pile with the double-layer lock catches formed by paving the sand filling pipe bags and the double-layer lock catches according to the claim 1, is characterized in that a water suction pump (12) is arranged at the bottom of the prefabricated drainage well (11), one end of one side of a water suction pipe (14) is connected with the water suction pump (12), the other end of the other side of the water suction pipe (14) is connected with a drainage pipe (13), and the drainage pipe (13) extends out of one slope surface of the back surface of the sand filling pipe bag (1).

6. The seepage-proofing and drainage system of the steel-pipe pile with the double-layer lock catches formed by paving the sand-filled pipe bags and the combined double-layer lock catches according to claim 2, wherein the T-shaped steel (1603) is clamped in the lock catches of the C-shaped steel (1602), and a protective bag (18) is arranged between the lock catch of the C-shaped steel (1602) and the lock catch of the T-shaped steel (1603) and is filled with seepage-proofing mortar (19).

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