CN-121992746-A - Construction method for ecological river pebble revetment

CN121992746ACN 121992746 ACN121992746 ACN 121992746ACN-121992746-A

Abstract

The invention discloses a construction method of an ecological river pebble revetment, which comprises the following steps of surveying and setting out reinforced shore sections, screening and cleaning river dredging pebbles, excavating a foundation, roughening the slope feet of the existing revetment, pouring concrete large square feet, connecting the concrete large square feet with old structure planting ribs to form an integral foundation, installing an auxiliary support frame, fixing and adjusting a drain pipe to a designed gradient, synchronously building a slurry masonry retaining wall and a dry pebble revetment from bottom to top, embedding the drain pipe into the slurry masonry retaining wall and the dry pebble revetment, forming fish scale textures, paving reverse filtering blind ditches layer by layer, backfilling and compacting, pouring concrete on the top, and finally curing and ecologically recovering. According to the invention, the local pebble material is utilized, the drainage pipe is accurately positioned through the auxiliary support frame, and the cooperative stress and layered compaction process of the old and new structures are combined, so that the anti-scouring, anti-sliding and drainage durability of the revetment are effectively improved, and the overall optimization of structural safety, ecological friendliness and construction efficiency is realized.

Inventors

Dai Anhua
CAI PENGLIN
NI SHASHA
ZHANG YUNBAO
Yang xiangxiang
WU CHUANJUN
CHEN JINXIA
ZHENG XIULI

Assignees

杭州中邦生态环境有限公司

Dates

Publication Date: 20260508
Application Date: 20260128

Claims (9)

1. The construction method of the ecological river pebble revetment is characterized by comprising the following steps of: The method comprises the steps of performing current situation investigation, measurement and lofting on a reinforced bank section, screening and cleaning original pebbles generated by dredging a river channel; excavating a revetment foundation to a designed elevation, and roughening the existing slope toe to form a rough joint surface; Pouring concrete large square feet at the slope feet as a foundation of the bank protection, and forming an integral stress structure by the large square feet and the existing slope protection subjected to roughening treatment through bar planting and concrete pouring; Installing an auxiliary support frame at the designed position of the back of the revetment wall after the construction of the concrete large square foot is completed, installing a drain pipe to the auxiliary support frame for positioning and temporary fixing, and adjusting the auxiliary support frame to adjust the drain pipe to a designed gradient; Step five, starting from the top of the square foot, carrying out the following operations layer by layer according to the designed elevation: (1) Synchronously and simultaneously bricklaying an inner side mortar layer Dan Dangqiang and an outer side protective layer, wherein an inner side mortar stone retaining wall is bricklayed by cement mortar, and a drain pipe is bricklayed and fixed in the wall body in the bricklaying process to form a whole with the mortar stone retaining wall; (2) When the single-layer slurry masonry retaining wall and the facing layer are built to a preset height, the auxiliary supporting frame is removed; (3) Paving a reverse filtering blind ditch formed by graded broken stone wrapped by geotextile on the back of the wall of the grout block Dan Dangqiang, wherein the water inlet end of the drain pipe is wrapped by the reverse filtering blind ditch; (4) Backfilling the back surface area of the grout block Dan Dangqiang with water-permeable filler in a layered manner, compacting the water-permeable filler in a layered manner, and burying a drain pipe and a reverse filtering blind ditch in backfill soil gradually; Step six, after the revetment main body is constructed to the designed elevation in a layered manner, casting concrete at the top of the revetment to press the top; And seventhly, maintaining the revetment structure, and recovering ecology in the construction disturbance area.
2. The construction method of the ecological riverway pebble revetment according to claim 1, wherein in the first step, the particle size of the pebbles is 15-30 cm, the pebbles are flat or elliptic, and the compressive strength is not lower than 50MPa.
3. The construction method of the ecological riverway pebble revetment according to claim 1, wherein in the second step, the roughening depth is not smaller than 10mm.
4. The construction method of the ecological riverway pebble revetment according to claim 1, wherein in the fourth step, the drain pipes are PVC pipes and are uniformly distributed at intervals of 2m in the horizontal direction.
5. The construction method for the ecological riverway pebble shore protection is characterized in that in the fourth step, the auxiliary support frame comprises a bottom support plate, an adjusting plate and a positioning plate, a fixing hole is formed in the bottom support plate, two positioning studs are symmetrically arranged on the bottom support plate, the adjusting plate is movably sleeved on the two positioning studs and is limited and fixed through a clamping nut, a dovetail sliding block is arranged on the adjusting plate, the dovetail sliding block is in sliding clamping connection with the adjusting sliding block, one end of the positioning plate is movably hinged with the adjusting sliding block through a first connecting rod, the other end of the positioning plate is movably hinged with the adjusting plate through a second connecting rod, middle threads of the adjusting sliding block penetrate through an adjusting screw, two ends of the adjusting screw are fixed with the adjusting plate through bearing seats, one end of the adjusting screw is connected with an operating disc, and two ends of the positioning plate are symmetrically provided with supporting fixing pieces.
6. The construction method of the ecological riverway pebble revetment according to claim 5, wherein in the fourth step, the auxiliary supporting frame is installed as follows: a. According to the arrangement requirement of the drain pipes, a plurality of auxiliary supporting frames are placed along the length direction of the revetment wall back, and the distance between two adjacent auxiliary supporting frames is measured and determined, so that the distance of the distance is equal to the distance of the distance between two adjacent drain pipes; b. the bottom surface of bottom support board is provided with location tooth portion, presses and strikes the bottom support board and make the whole embedding of location tooth portion to the dado back in the domatic soil that has excavated to cooperate the fixed orifices with the auxiliary stay frame through the rag screw further fixed.
7. The construction method for the ecological riverway pebble revetment according to claim 6, wherein the installation step of the auxiliary supporting frames further comprises the step of arranging auxiliary perforations on the bottom supporting plates, connecting the auxiliary supporting frames in series through the auxiliary perforations by means of traction ropes, and fixing two ends of the traction ropes with the slope through fixing piles.
8. The construction method for the pebble revetment of the ecological river channel according to claim 6, wherein in the fourth step, the drain pipe is mounted on the auxiliary supporting frame as follows: a. The supporting and fixing piece comprises a fixing seat, a clamping hoop ring and an auxiliary clamping support, wherein an arc-shaped groove is formed in the fixing seat, the fixing seat is fixed with a positioning plate through screws, two mounting studs are symmetrically arranged on the fixing seat, the clamping hoop ring is sleeved between the two mounting studs, a fastening nut is arranged at the top of each mounting stud, a supporting rod is arranged on the fixing seat, a through hole is formed in each supporting rod, a connecting stud is arranged on the auxiliary clamping support, the connecting stud penetrates through the through hole and is connected with the corresponding locking nut, and meanwhile a pressure spring is sleeved on a connecting stud section between each supporting rod and the corresponding auxiliary clamping support; b. placing the drain pipe into arc-shaped grooves of the fixing seats of the two supporting fixing pieces, sleeving the clamping ring on the two mounting studs, and screwing in the fastening nuts on the mounting studs and locking the fastening nuts, so that the drain pipe is limited and fixed between the fixing seats and the clamping ring; c. and unscrewing the locking nut, and moving the auxiliary clamping support upwards under the resilience force of the pressure spring until the auxiliary clamping support is abutted on the bottom surface of the drain pipe, and screwing the locking nut.
9. The construction method of the ecological riverway pebble revetment according to claim 5, wherein in the fourth step, the auxiliary supporting frame is adjusted as follows: a. The adjusting screw is rotated through the operating panel, so that the adjusting slide block moves along the dovetail slide block to drive the positioning plate to swing and incline, and the drain pipe is adjusted to the designed drain gradient; b. And unscrewing the clamping nut, moving the adjusting plate along the positioning stud, driving the positioning plate to synchronously and vertically move and adjust by the adjusting plate until the drain pipe is adjusted to a set installation height, and then screwing the clamping nut.

Description

Construction method for ecological river pebble revetment Technical Field The invention belongs to the technical field of ecological slope protection, and particularly relates to a construction method for protecting a bank by pebbles in an ecological river channel. Background With the popularization of deep promotion and river basin comprehensive treatment concepts of ecological civilization construction in China, the defects of the traditional river bank protection structure in ecological functions, landscape coordination and sustainability are increasingly highlighted. Especially in the harnessing engineering of mountain stream river, because of its characteristics of water flow turbulence, large water level amplitude, rich pebbles in river bed, etc., it has raised requirements for the scouring resistance, permeation stability and ecological affinity of revetment structure. While the existing ecological bank protection technology is developed in the aspect of improving ecological connectivity, when the severe hydrogeological conditions are treated, three challenges of structure, manufacturability and economy are faced, namely, a traditional dry masonry bank protection structure is loose, impact stability is insufficient, a flexible ecological structure is sensitive to foundation settlement and poor in durability, and most of technologies fail to systematically solve key problems of post-wall drainage failure, local material recycling, construction process precision control and the like, so that engineering is difficult to comprehensively consider between long-term safety, ecological benefits and cost efficiency. Disclosure of Invention The invention aims to provide a technical scheme of a construction method for ecological river channel pebble revetment, which aims at overcoming the defects of the prior art, not only can local materials be obtained, and the river channel dredging pebble is utilized to realize the recycling of local materials, so that the engineering cost is reduced, but also a stable gravity type composite structure with scouring resistance and sliding resistance is constructed by combining a rigid large square foot foundation with a new and old structure in a cooperative stress design and with wall back layered compaction backfill. The most critical is, utilize auxiliary stay frame can realize the accurate fine setting of prepositioning and slope to the drain pipe to through synchronous masonry technology with the drain pipe accurate inlay solid in barricade and facing cap, and ensure its play water end and fish scale form facing cap hole reliable intercommunication, showing the reliability and the durability that have promoted drainage system. The finally formed revetment has excellent flood control safety, permeation stability, natural ecological landscape and long-acting durability, and overall optimization of engineering structure, drainage function, ecological restoration and construction efficiency is realized. In order to solve the technical problems, the invention adopts the following technical scheme: A construction method for protecting a bank by pebbles in an ecological river channel comprises the following steps: The method comprises the steps of performing current situation investigation, measurement and lofting on a reinforced bank section, screening and cleaning original pebbles generated by dredging a river channel; excavating a revetment foundation to a designed elevation, and roughening the existing slope toe to form a rough joint surface; Pouring concrete large square feet at the slope feet as a foundation of the bank protection, and forming an integral stress structure by the large square feet and the existing slope protection subjected to roughening treatment through bar planting and concrete pouring; Installing an auxiliary support frame at the designed position of the back of the revetment wall after the construction of the concrete large square foot is completed, installing a drain pipe to the auxiliary support frame for positioning and temporary fixing, and adjusting the auxiliary support frame to adjust the drain pipe to a designed gradient; Step five, starting from the top of the square foot, carrying out the following operations layer by layer according to the designed elevation: (1) Synchronously and simultaneously bricklaying an inner side mortar layer Dan Dangqiang and an outer side protective layer, wherein an inner side mortar stone retaining wall is bricklayed by cement mortar, and a drain pipe is bricklayed and fixed in the wall body in the bricklaying process to form a whole with the mortar stone retaining wall; (2) When the single-layer slurry masonry retaining wall and the facing layer are built to a preset height, the auxiliary supporting frame is removed; (3) Paving a reverse filtering blind ditch formed by graded broken stone wrapped by geotextile on the back of the wall of the grout block Dan Dangqiang, wherein the water inlet end of the drain pi