CN-122013718-A - Construction method of ecological river channel short dam

CN122013718ACN 122013718 ACN122013718 ACN 122013718ACN-122013718-A

Abstract

The invention discloses a construction method of a short dam of an ecological river, which comprises the steps of preparing before construction, longitudinally arranging a straw bag cofferdam, excavating and processing a dam foundation, installing a dam body, and completing construction. The dam body installation standard unification and stabilization are realized by arranging the concrete bottom plate and the installation groove, and the prefabricated dam body can be accurately aligned and reliably clamped in the installation process by cooperating the driving assembly and the positioning support mechanism, so that the dam body inclination problem caused by uneven river bank topography is effectively solved. The method remarkably improves the installation precision and efficiency of the split dam body, ensures the overall stability and sealing performance of the low dam structure, reduces the dependence on large hoisting equipment, and reduces the construction difficulty and safety risk under complex terrains.

Inventors

YE YU
LI XUANDONG
Nie xiong
LU LINLIN
CHEN HELIANG
HU CONGYING
XU ZHENGHUA
XU ZHONGFU

Assignees

杭州中邦生态环境有限公司

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (10)

1. The construction method of the ecological river channel short dam is characterized by comprising the following steps: a. Preparation before construction Before construction, cleaning a river channel dam site area, removing miscellaneous trees, weeds, garbage and loose floating soil on the surface, and measuring and lofting; b. longitudinal straw bag cofferdam Sectional marking is carried out on the constructed dam body, and soil bags with the top width of 2.0m and the height of 1.5m are built along the river course to carry out sectional cofferdam according to the marks; c. Dam foundation excavation and treatment Digging at the construction position of the dam foundation by an excavator, matching with manual trimming, and rolling or tamping the bottom surface of the dam foundation after digging to the designed elevation to ensure that the bearing capacity of the foundation meets the design requirement; d. Dam installation 1) Concrete bottom plate pouring Pouring a concrete bottom plate on the dam foundation which is qualified in acceptance, and pouring an installation groove for fixing the dam body on the bottom plate; 2) Dam body splicing After the concrete bottom plate is maintained, fixing driving components are installed on the edges of two sides of the installation groove, positioning supporting mechanisms are movably connected to the driving components, prefabricated sectional type dam bodies are hoisted into the installation groove through hoisting equipment, the positioning supporting mechanisms limit the dam bodies in the installation groove, and then two adjacent dam bodies are connected through splicing pieces; 3) Sectional pouring After the dam body of the current section is spliced in the mounting groove, the driving assembly and the positioning supporting mechanism are disassembled, and then templates are mounted along the edges of the two sides of the mounting groove for pouring and fixing; e. completing the construction Repeating the steps b to d to finish the construction of the short dam.
2. The method for constructing the low dam of the ecological riverway according to claim 1, wherein splicing blocks are arranged on two sides of each dam body, splicing frames are arranged on the splicing blocks, splicing grooves are formed in two sides of each splicing frame, corresponding to the splicing blocks, of each splicing block of two adjacent dam bodies, and the splicing blocks are respectively inserted into the splicing grooves on two sides of each splicing frame.
3. The method of claim 1, wherein in the step b, the water is covered with a water-stop color cloth and compacted with bagged soil.
4. The method of claim 1, wherein in the step d, the method further comprises fixing the culture tanks, and after the splicing of the dam bodies is completed, fixedly connecting the bottoms of the culture tanks to the tops of two adjacent dam bodies through fixing pieces.
5. The construction method of the ecological riverway short dam according to claim 4, wherein the dam body is provided with an ecological overflow hole, two sides of the bottom of the culture groove are provided with limiting grooves, the fixing piece comprises a U-shaped clamping frame, a jacking screw rod and a jacking block, the top of the U-shaped clamping frame is provided with a limiting part, the bottom of the U-shaped clamping frame is provided with a mounting part, the limiting part is clamped in the limiting groove, the U-shaped clamping frame is arranged in the ecological overflow hole, the jacking screw rod is movably connected to the mounting part, the top of the jacking screw rod is fixedly connected with the jacking block, and the jacking block is jacked on the top in the ecological overflow hole, so that the culture groove is fixedly connected to the tops of two adjacent dams.
6. The construction method of the ecological riverway short dam according to claim 1, wherein the driving assembly comprises a first base, a second base, a ball screw, a driving box and a screw motor, the first base is arranged on the edge of the mounting groove far away from one side of the riverway, the second base is arranged on the edge of the mounting groove near one side of the riverway, the first base and the second base are both rotationally connected with the ball screw, the end parts of the first base and the second base are fixedly connected with one side of the driving box, the end parts of the ball screw are connected with a driving wheel, the driving wheel is positioned in the driving box, the screw motor is fixedly connected with the other side of the driving box, the output end of the screw motor is connected with a driving wheel, the driving wheel is positioned in the driving box, a driving belt is connected between the driving wheel and the driving wheel, the driving motor controls the two ball screws to rotate, and the ball screw is movably connected with a positioning and supporting mechanism.
7. The method of claim 6, wherein the positioning and supporting mechanism comprises a positioning component and a supporting component, the positioning component is movably connected to the ball screw in the second base, the supporting component is movably connected to the ball screw in the second base, the positioning component is abutted against one side of the dam, and the supporting component is supported on the other side of the dam.
8. The construction method of the ecological riverway short dam according to claim 7, wherein the positioning assembly comprises a first sliding block, a base, an upright post and positioning blocks, the first sliding block is fixedly connected to the bottom of the base, the first sliding block is movably connected to the ball screw located in the second base, the bottom of the upright post is fixedly connected to the base, the top of the upright post is movably connected with an adjusting screw, the end part of the adjusting screw is fixedly connected with the positioning blocks, the positioning blocks are propped against a dam body, adjusting nuts are screwed into two ends of the adjusting screw, and the adjusting nuts are screwed into the upright post.
9. The construction method of the ecological riverway short dam according to claim 7, wherein the supporting component comprises a supporting table and an inclined strut component, a second sliding block is fixedly connected to the bottom of the supporting table and movably connected to the ball screw located in the first base, a supporting column is arranged on one side, far away from the sliding block, of the supporting table, a supporting block is arranged at the bottom of the supporting column, locking nuts are screwed into the supporting column, the locking nuts are screwed at the upper end and the lower end of the supporting table, the bottom of the inclined strut component is fixedly connected to the top surface of the supporting table, and the top of the inclined strut component abuts against the dam body.
10. The construction method of the ecological riverway short dam according to claim 9, wherein the diagonal bracing assembly comprises a tightening block, a first rotating seat, a second rotating seat and a diagonal bracing rod, the first rotating seat is fixedly connected to the supporting table, the second rotating seat is fixedly connected to one side of the tightening block, one end of the diagonal bracing rod is rotatably connected with the first rotating seat through a first rotating shaft, a first threaded connecting portion is arranged at the end of the first rotating shaft, a first limiting sleeve is screwed in the first threaded connecting portion, the first limiting sleeve is screwed on the first rotating seat, the other end of the diagonal bracing rod is rotatably connected with the second rotating seat through a second rotating shaft, a second threaded connecting portion is arranged at the end of the second rotating shaft, a second limiting sleeve is screwed in the second threaded connecting portion, and the second limiting sleeve is screwed on the second rotating seat.

Description

Construction method of ecological river channel short dam Technical Field The invention belongs to the technical field of water conservancy, and particularly relates to a construction method of a low dam of an ecological riverway. Background With the deep implementation of the national country plain and the mountain water Lin Tianhu grass system management concept, the mountain small-river basin comprehensive management has become a key link for improving regional water safety guarantee and restoring river ecological corridor, and the short dam is used as a core project for regulating and controlling water flow, fixing bed scour prevention and building ecological environment in ecological river management, and the structural form and construction process directly influence the management effect. However, in actual construction, the dam body is often faced with serious challenges in the installation process, because the river bank topography is complex, perpendicularity and levelness are difficult to ensure when the prefabricated dam body is hoisted in place, the inclination phenomenon is very easy to occur, the inclination problem in the installation process not only affects the splicing precision between adjacent dam segments, so that joints are uneven and are not tight, poor contact between the bottom of the dam body and a foundation can be caused, a local suspension area is formed, the overall structural stability of a short dam can be weakened, and the water flow impact resistance of the short dam can be affected. Meanwhile, the inclined dam body often needs to be repeatedly adjusted and re-hoisted, so that the installation period is obviously prolonged, and the construction cost and the safety risk are increased. Disclosure of Invention The invention aims to solve the technical problems in the prior art and provides a construction method of an ecological river short dam, which realizes unification and stabilization of dam installation references by arranging a concrete bottom plate and an installation groove, cooperates with a driving assembly and a positioning support mechanism to carry out cooperative operation, can accurately align and reliably clamp a prefabricated dam in the installation process, effectively solves the problem of dam inclination caused by uneven river bank topography, remarkably improves the installation precision and efficiency of a split dam, ensures the overall stability and tightness of a short dam structure, reduces the dependence on large hoisting equipment, and reduces construction difficulty and safety risk under complex topography. In order to solve the technical problems, the invention adopts the following technical scheme: a construction method of an ecological river short dam comprises the following steps: a. Preparation before construction Before construction, cleaning a river channel dam site area, removing miscellaneous trees, weeds, garbage and loose floating soil on the surface, and measuring and lofting; b. longitudinal straw bag cofferdam Sectional marking is carried out on the constructed dam body, and soil bags with the top width of 2.0m and the height of 1.5m are built along the river course to carry out sectional cofferdam according to the marks; c. Dam foundation excavation and treatment Digging at the construction position of the dam foundation by an excavator, matching with manual trimming, and rolling or tamping the bottom surface of the dam foundation after digging to the designed elevation to ensure that the bearing capacity of the foundation meets the design requirement; d. Dam installation 1) Concrete bottom plate pouring Pouring a concrete bottom plate on the dam foundation which is qualified in acceptance, and pouring an installation groove for fixing the dam body on the bottom plate; 2) Dam body splicing After the concrete bottom plate is maintained, fixing driving components are installed on the edges of two sides of the installation groove, positioning supporting mechanisms are movably connected to the driving components, prefabricated sectional type dam bodies are hoisted into the installation groove through hoisting equipment, the positioning supporting mechanisms limit the dam bodies in the installation groove, and then two adjacent dam bodies are connected through splicing pieces; 3) Sectional pouring After the dam body of the current section is spliced in the mounting groove, the driving assembly and the positioning supporting mechanism are disassembled, and then templates are mounted along the edges of the two sides of the mounting groove for pouring and fixing; e. completing the construction Repeating the steps b to d to finish the construction of the short dam. Further, splicing blocks are arranged on two sides of the dam body, splicing frames are arranged on the splicing pieces, splicing grooves are formed in the two sides of the splicing frames corresponding to the splicing blocks, and the splicing blocks of two adjacent dam bodies are