A kind of river course guiding device
Technical field
The utility model relates to the guiding device in a kind of water resources and hydropower construction, particularly is applicable to a kind of river course guiding device of river closure construction.
Background technology
Water conservancy, hydroelectric project will be built building in the scope in river course, must block the river.The river that blocks behind the river must have outlet, otherwise, its barrage building that must destroy by rush of water.Before permanent parallel works does not form, can't carry out river closure, then can't carry out the construction of building in the scope in riverbed, the utility model can solve this difficult problem.
Summary of the invention
The utility model technical problem to be solved provides a kind of river course guiding device, can solve the river by the river problem of outlet after blocking, so that in the scope in river course, carry out building operations.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of river course guiding device, comprise the cofferdam, and the middle part, cofferdam is provided with material for diaphragm wall of Cofferdam, and the cofferdam is provided with the mozzle that is communicated with upstream and downstream, and mozzle is provided with gate.
Described gate is installed in the upper reaches of mozzle.
Described mozzle top is provided with the antiseepage body, is provided with geomembrane in the antiseepage body.
Described geomembrane lower end is connected with the concrete that is cast in the mozzle top through screw rod.
The flow in dry season river course is limited, if isolate limited water and river course, and ejectment just can utilize the dry season to carry out building operations in the scope in riverbed to the downstream in building operations zone.
A kind of river course guiding device that the utility model provides is through adopting above-mentioned structure, the problem of river water conservancy diversion when having solved cofferdam construction; With establish the cofferdam in upstream and downstream in the prior art; And the job practices of establishing diversion canal in addition compares, and greatly reduces difficulty of construction, improved efficiency of construction.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the cross section view of the utility model.
Fig. 2 is the partial enlarged drawing at A place among Fig. 1.
Fig. 3 is that B among Fig. 1 is to partial view.
Among the figure: gate 1, mozzle 2, antiseepage body 3, geomembrane 4 is crossed chute 5, screw rod 6, concrete seven, material for diaphragm wall of Cofferdam 8, cofferdam 9.
The specific embodiment
In Fig. 1, Fig. 2 and Fig. 3, a kind of river course guiding device comprises cofferdam 9, and 9 middle parts, cofferdam are provided with material for diaphragm wall of Cofferdam 8, and cofferdam 9 is provided with the mozzle 2 that is communicated with upstream and downstream, and mozzle 2 is provided with gate 1.In this example, mozzle 2 adopts steel pipe.
Described gate 1 is installed in the upper reaches of mozzle 2, adopts the lift-type Flat Sluice.
In Fig. 2, described mozzle 2 tops are provided with antiseepage body 3, are provided with geomembrane 4 in the antiseepage body 3.
Described geomembrane 4 lower ends are connected with the concrete seven that is cast in mozzle 2 tops through screw rod 6.Concrete adopts the C20 concrete, and screw rod 6 is embedded in the concrete, and one deck SR plasticity caulking material at first is installed on the screw rod 6, and geomembrane 4 is installed then, and channel-section steel is installed again, and is fastening with nut at last, and antiseepage body 3 is filled in geomembrane 4 both sides.
Embodiment:
Earlier carry out the cofferdam and fills, after the right bank section is filled completion, reserve in an opposite direction dike in the riverbed in river course, right side and wrap up in head, reserve the Long Kouchu boulder of jettisoninging and clash dike and wrap up in head protection, and carry out material for diaphragm wall of Cofferdam and construct from right bank.The left bank is carried out the cofferdam and is filled, and after the left bank section is filled completion, reserves in an opposite direction dike in the riverbed in river course, left side and wraps up in head, reserves the Long Kouchu boulder of jettisoninging and clash dike and wrap up in head protection, and carry out material for diaphragm wall of Cofferdam and construct.Left and right bank cofferdam also can be filled simultaneously, reserves the Longkou overcurrent in the river course.After treating that the water conservancy diversion steel pipe is installed (can cross in the chute 5 in the cofferdam on a left side or right side according to landform and install) completion, carry out river closure.Behind the river closure, river flows to the downstream of construction area through the water conservancy diversion steel pipe.
Before river course steel pipe water conservancy diversion is implemented, calculate the caliber of river course water conservancy diversion steel pipe, make it in certain period, can satisfy the river course streamflow according to hydrological data.