Summary of the invention
One of object of the present invention is in order to reduce construction costs, to guarantee, under the prerequisite of structural stability, to provide a kind of inland river intake structure of electric power plant circulating water system.This inland river intake structure overcomes prior art and need to form dry work environment, needs to consider the working measures such as cofferdam, and construction period is longer, the defect that cofferdam expense is high.
Two of object of the present invention is for a kind of construction method of inland river intake structure of electric power plant circulating water system is provided.
One of object of the present invention can reach by following technical solution:
The inland river intake structure of electric power plant circulating water system, comprises pile foundation and water intake, and described pile foundation forms by burying many spud piles that are inserted in riverbed, inland river, and all the upper end of spud piles is in same level; Described water intake is integral type steel concrete frame structure, is provided with the installation groove corresponding with pile foundation spud pile in the bottom of water intake, and water intake utilizes the direct snapping of this installation groove to be fixedly mounted in pile foundation, forms sealed collecting well; At the sidewall of water intake, be provided with the top that water inlet described in water inlet and delivery port is located at sealed collecting well, delivery port is located at the bottom of sealed collecting well, and delivery port is connected with intake pipe, forms sealed rigidity inland river intake structure.
One of object of the present invention can also reach by following technical solution:
Further, described water-fetching head is precast concrete, in the bottom of water intake, is provided with anchor block, and described installation groove is located on anchor block.
Further, the main part of described water intake is oblong-shaped, at two ends of described main part, respectively extends a triangle, forms flow-guiding structure.
Further, in water intake, be provided with maintenance access with cover.
Further, described flow-guiding structure flows to and arranges along river, forms the side wall of water intake.
Further, at water inlet, place is provided with screen pack, and this screen pack is propped up side by side and installed and form by many stainless steel steel; At water outlet, be embedded with steel sleeve.
Further, described many spud piles consist of buried steel pipe in riverbed, form steel management system pile foundation.
Two of object of the present invention can reach by following technical solution:
The construction method of the inland river intake structure of foregoing electric power plant circulating water system, is characterized in that comprising the steps:
1) in the riverbed in inland river, choose position, excavate top layer mud, An She interval, the position piling selected, makes the top of whole spud piles in same level, forms the pile foundation of the pile foundation height being comprised of many spud piles;
2) prefabricated steel concrete water intake on land, at the reserved groove corresponding with the spud pile upper end size and dimension of pile foundation in the bottom of water intake; Sidewall at water intake is provided with water inlet and delivery port, and described water inlet is located at the top of water intake, and delivery port is located at the bottom of water intake
3) utilize above-water hoisting construction equipment, water intake snapping is arranged in pile foundation, by the groove of water intake, be directly buckled on the spud pile of pile foundation fixingly, form sealed collecting well;
4) at delivery port, be connected with intake pipe, form sealed rigidity inland river intake structure.
Two of object of the present invention can also reach by following technical solution:
Further, described foundation pile adopts steel pipe pile, each foundation pile is cut flatly when water intake is installed, and makes each foundation pile upper end be same level.
Further, at hypomere and the intake pipe periphery Cast-in-situ Piles in Sand-filling of water intake, on sand bed, utilize stone to compress compacting, avoid running off, form riverbed; Described riverbed consists of the backfill layer of sand of low layer and the rock layer compacting on layer of sand.
The present invention has following outstanding advantages and remarkable result:
1, the present invention is because water intake is set to integrated steel reinforced concrete frame structure, in the bottom of water intake, be provided with the installation groove corresponding with pile foundation spud pile, water intake utilizes the direct snapping of this installation groove to be fixedly mounted in pile foundation, forms sealed collecting well; At the sidewall of water intake, be provided with the top that water inlet described in water inlet and delivery port is located at sealed collecting well, delivery port is located at the bottom of sealed collecting well, and delivery port is connected with intake pipe, forms sealed rigidity inland river intake structure; Therefore solve less stable that head portion adopts steel work to exist, need to consider anticorrosion, overall cost and the more high volume of maintenance cost, there is good stability, without considering anticorrosion and overall cost and the low beneficial effect of maintenance cost.
2, the present invention is because water-fetching head is precast concrete, bottom at water intake is provided with anchor block, described installation groove is located on anchor block, water intake utilizes the direct snapping of this installation groove to be fixedly mounted in pile foundation, therefore operation on the water, the water-fetching head that has solved prior art adopts cast-in-place concrete structure to exist need to form dry work environment, need to consider the working measures such as cofferdam, construction period is the problem such as length and cofferdam expense height, there is structural stability good, assurance structural safety is reliable, constructure scheme is simple, be conducive to the beneficial effects such as accelerating construction progress.
3, the present invention is embedded under riverbed in water intake hypomere, intake pipe and pile foundation, and in water intake hypomere, intake pipe and pile foundation periphery backfill layer of sand and rock layer, effectively prevents that water intake and pile foundation from departing from, and makes water intake more firm on riverbed, and functional performance is better.
4, water intake of the present invention is provided with the guide wall of V dihedral in the both sides, front and back of river direction, effectively prevents when flowing water is too urgent water intake to produce and impact, and affects the functional performance of water intake, avoids being damaged.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment 1:
Inland river intake structure referring to figs. 1 through the electric power plant circulating water system shown in Fig. 5, comprises pile foundation 1 and water intake 2, and described pile foundation 1 forms by burying many spud piles that are inserted in riverbed, inland river 3, and all the upper end of spud piles is in same level; Described water intake 2 is integral type steel concrete frame structure, is provided with the installation groove 4 corresponding with pile foundation 1 spud pile in the bottom of water intake 2, and water intake 2 utilizes the direct snapping of this installation groove 4 to be fixedly mounted in pile foundation 1, forms sealed collecting well 7; Sidewall at water intake 2 is provided with water inlet 5 and delivery port 6, and described water inlet 5 is located at the top of sealed collecting well 7, and delivery port 6 is located at the bottom of sealed collecting well 7, and delivery port 6 is connected with intake pipe 61, forms sealed rigidity inland river intake structure.
In embodiment, described water-fetching head 2 is precast concrete, in the bottom of water intake 2, is provided with anchor block 41; Described installation groove 4 is located on anchor block 41; The main part of described water intake 2 is oblong-shaped, at two ends of described main part, respectively extends a triangle, forms flow-guiding structure 10; In water intake 2, be provided with maintenance access with cover 14; Described flow-guiding structure 10 flows to and arranges along river, forms the side wall of water intake 2; At water inlet, 5 places are provided with screen pack 11, and this screen pack props up 12 by many stainless steel steel and installs and form side by side; At delivery port, 5 places are embedded with steel sleeve 13, and the fixed installation of being convenient to intake pipe connects; Described many spud piles consist of buried steel pipe in riverbed, form steel management system pile foundation 1.
The construction method of the inland river intake structure of above-mentioned electric power plant circulating water system, comprises the steps:
1) in the riverbed in inland river, choose position, excavate top layer mud, An She interval, the position piling selected, makes the top of whole spud piles in same level, forms the pile foundation of pile foundation 1 height being comprised of many spud piles;
2) prefabricated steel concrete water intake 2 on land, at the reserved groove 4 corresponding with the spud pile upper end size and dimension of pile foundation in the bottom of water intake; Sidewall at water intake 2 is provided with water inlet 5 and delivery port 6, and described water inlet 5 is located at the top of water intake 2, and delivery port 6 is located at the bottom of water intake 2
3) utilize above-water hoisting construction equipment, water intake 2 snappings are arranged in pile foundation, by the groove 4 of water intake 2, be directly buckled on the spud pile of pile foundation fixingly, form sealed collecting well 7;
4) at delivery port 6, be connected with intake pipe 61, form sealed rigidity inland river intake structure.
In concrete grammar is implemented, described foundation pile 1 adopts steel pipe pile, each foundation pile is cut flatly when water intake is installed, and makes each foundation pile upper end be same level; At hypomere and the intake pipe periphery Cast-in-situ Piles in Sand-filling of water intake, on sand bed, utilize stone to compress compacting, avoid running off, form riverbed; Described riverbed 3 consists of the backfill layer of sand 8 of low layer and rock layer 9 compactings on layer of sand 8.
Embodiment 2
The difference of technical characterictic described in the present embodiment 2 and embodiment 1 is, the inland river intake structure of electric power plant circulating water system is built in the region, Ha Noi of water flow stationary, saves the flow-guiding structure 10 that each triangle extending forms at water intake 2 main part two ends.All the other are with embodiment 1.
The present invention is applied to the large-scale gas power plant in certain inland makeup Water System, the about 220m of intake offshore distance, and the thick about 40m of mud of intake position, seashore physical features is smooth.It is 600mm steel pipe pile that the pile foundation 1 of described water-fetching head adopts 4 diameters, the long 50m of stake.Water intake adopts precast concrete to make after moulding dry on the ground, adopts above-water hoisting construction.When water-fetching head 2 is prefabricated, reserved installation groove 4 is directly buckled on steel pipe pile, and water intake 2 is effectively fixedly connected with pile foundation 1, then at pile foundation 1 and water intake 2 periphery backfill layers of sand 8, and on layer of sand, utilizes rock layer 9 to compress compacting.From construction and operating condition, respond well, met designing requirement.