High abutment pier high fill lock chamber U type prestressed cable dock type structure system
The utility model relates to ship lock, a kind of high abutment pier high fill lock chamber dock type structure system of more specifically saying so.
Ship lock is as the principal mode in navigation structure, is the hydraulic structure of the boats and ships that can go up and down built for the water-head that overcomes on the navigation channel, and in water conservancy and water route transport undertaking, occupies an important position always.Depressed place formula lock chamber is owing to its good integrity, and barrier properties is strong, and subgrade reaction distributes more even, to a lot of advantages such as the ground requirement for bearing capacity are lower, on soft foundation, complex foundation, often adopts, and integral working is preferably arranged.
High abutment pier high fill lock chamber dock type structure system is meant that lock chamber height of side wall and lock chamber width compare the structural system greater than 1.0; All be to adopt reinforced concrete structure at present in this structural system; Higher owing to banket behind the wall, soil pressure is bigger, need dispose lot of reinforcing steel bar at its reinforced concrete structure, when lock wall height or baseplate width strengthen; The size of lock wall, base plate and amount of reinforcement can further increase; Because of plain bars tensile strength is lower, need come guaranteed strength through strengthening amount of reinforcement, this makes structure very uneconomical; Adopt the concrete structure of plain bars, its concrete is in tension state all the time, the crack frequently occurs, and crack width is difficult to satisfy code requirement.
On the other hand, depressed place formula lock chamber is as large volume concrete structural, receives the influence of hydration heat of cement at the construction initial stage, and internal temperature raises soon than external temperature, and volume of concrete expands big, thereby produces tensile stress at body structure surface; In the post drop process,, in concrete structure, can produce tensile stress owing to receive the constraint of basis or old concrete and the constraint of the inside concrete temperature difference; Perhaps prominent when meeting cold wave, surface temperature of concrete rapid drawdown and produce very big shrinkage strain receives inner constraint and produces very big tensile stress.And concrete tensile strength is low, and ultimate elongation distortion is little, and when tensile stress surpassed concrete tensile strength or stretching strain and surpasses concrete ultimate tensile strength, vertical crack will appear in concrete structure.Vertical crack has changed the stress distribution that design is arranged in case formation has influence in various degree to hydraulic structure; Changed the stress condition of building, reduced the impermeability of water retaining structure, the carbonization of accelerate concrete; Concrete basicity is reduced; Water and air has quickened inner arrangement of reinforcement corrosiveness when immersing simultaneously, also can reduce the decay resistance that concrete is resisted various corrosive mediums, causes concrete structure to destroy; Reduce power resistance strength, stability and the durability of structure, brought very big negative effect for the economic benefit of building.
Summary of the invention
The utility model is for avoiding above-mentioned existing in prior technology weak point; A kind of high abutment pier high fill lock chamber U type prestressed cable dock type structure system is provided, so that depressed place formula lock chamber structure stress is good, the compressive stress deposit is high, the crack produces less, the construction period heat of hydration is less, reduce cost.
The utility model adopts following technical scheme for the technical solution problem:
The high abutment pier high fill of the utility model lock chamber U type prestressed cable dock type structure system is to adopt depressed place formula lock chamber; Its design feature is in the formula lock chamber of said depressed place; Transverse shape setting " U " type prestressed strand by depressed place formula lock chamber; The two ends of said " U " type prestressed strand are provided with stretching-drawing structure in the side wall of said depressed place formula lock chamber, form prestressed reinforced concrete construction; In the inside and outside both sides of said depressed place formula lock chamber side wall, be provided with vertical thermal stresses and discharge seam, and in said vertical thermal stresses release seam, waterproof construction is set.
The design feature of the high abutment pier high fill of the utility model lock chamber U type prestressed cable dock type structure system also is:
In the lock chamber structure, bury prestress pipe underground, prestressed strand is set in the prestress pipe.
On said prestress pipe, madjack pipe is set, can passes through said madjack pipe mud jacking in said prestress pipe.
Compared with present technology, the utility model beneficial effect is embodied in:
1, the utility model adopts prestressed reinforced concrete construction in the lock chamber structure; Give full play to the high and big advantage of prestressed strand tensile strength of concrete crushing strength; Reduce the tensile stress of lock chamber structure; Even in lock chamber, keep certain compressive stress deposit, and the cracking of control sluice cell structure effectively, thus the durability of ship lock strengthened; Simultaneously, adopt prestressed strand can reduce amount of reinforcement significantly, thereby reduce construction costs;
2, the utility model is provided with vertical thermal stresses release seam through the inside and outside both sides of the formula lock chamber side wall in the depressed place; And relative set waterproof construction; Make the lock chamber side wall when concreting, obtain release because the thermal stresses that temperature causes discharges the seam place in thermal stresses; Thereby reduced the appearance of thermal cracking significantly, guaranteed project durability.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a stretching-drawing structure sketch map in the utility model;
Fig. 3 is that vertical thermal stresses discharges the crack structure sketch map in the utility model;
Label among the figure: 1 depressed place formula lock chamber; 2 prestressed strands; 3 stretching-drawing structures; 4 vertical thermal stresseses discharge seam; The 4a copper seal; 5 distributing bars; 6 prestress pipes; 7 madjack pipes; 8 lockage ships.
The specific embodiment
High abutment pier high fill lock chamber U type prestressed cable dock type structure system in the present embodiment, its high abutment pier high fill are meant that lock chamber height of side wall and lock chamber width compare the structural system greater than 1.0, and shown in Figure 1 is that lockage ship 8 is arranged in ship lock.
Like Fig. 1, Fig. 2 and shown in Figure 3; Adopt depressed place formula lock chamber 1, in depressed place formula lock chamber 1, by transverse shape setting " U " the type prestressed strand 2 of depressed place formula lock chamber 1; The two ends of " U " type prestressed strand 2 are provided with stretching-drawing structure 3 in the side wall of depressed place formula lock chamber 1, form prestressed reinforced concrete construction; The inside and outside both sides of formula lock chamber 1 side wall in the depressed place are provided with vertical thermal stresses and discharge seam 4, and in vertical thermal stresses release seam 4, waterproof construction are set.
Vertical thermal stresses discharges to stitch and is arranged on exterior bottom position in the lock chamber side wall in the present embodiment, stitches high 5m, wide 2mm, and every 8m is provided with together.
In the practical implementation, by conventional requirement, for adapting to corresponding structure, on the relevant position, distributing bar 5 should be set, in order to guarantee the stretch-draw of prestressed strand 2, in the lock chamber structure, should bury prestress pipe 6 underground, prestressed strand 2 is set in the prestress pipe 6.
Work progress carries out as follows:
1, lay distributing bar 5, lay prestress pipe 6 according to the position of design prestressed strand, prestress pipe 6 is fixed on the distributing bar, on the prestress pipe, on two side positions at 150cm place, lock floor center, madjack pipe 7 is set respectively;
2, cast lock floor and lock chamber side wall are constructed vertical thermal stresses simultaneously and are discharged seam; In prestress pipe, penetrate prestressed strand; Treat that lock chamber intensity reaches 90% of design strength, and when backfill is backfilled to design altitude behind the wall, through stretching-drawing structure 3 stretch-draw prestressing force steel bundles 2; And prestress pipe 6 carried out mud jacking, continue to get into the construction of next stage.
The position that meets water that discharges seam 4 in vertical thermal stresses is provided with copper seal 4a, and copper seal 4a answers elongated continuous layout, and seam requires to adopt the full weld joint.