阅读说明：本技术 一种可供快速拆卸的河道暗涵临时挡水结构、搭建方法及快速拆卸和复建方法 (Riverway culvert temporary water retaining structure capable of being rapidly disassembled, building method and rapid disassembling and rebuilding method ) 是由 邓磊 王哲鑫 蒋铁 王勤 陈征 姚琦 于 2019-11-25 设计创作，主要内容包括：本发明提供了一种可供快速拆卸的河道暗涵临时挡水结构、搭建方法及快速拆卸和复建方法,包括钢管脚手架、袋装土袋、充气安全气囊和斜撑；钢管脚手架为多层结构,钢管脚手架的下部框格填装袋装土袋,进行压配重,同时也形成下部挡水结构；钢管脚手架的上部框格填装充气安全气囊而形成上部挡水结构；钢管脚手架在背水面连接斜撑和/或抛撑。本发明能够实现快速拼装,快速挡水,同时受到气象或水文预报后能够迅速恢复过流断面。(The invention provides a riverway blind culvert temporary water retaining structure capable of being quickly disassembled, a construction method and a quick disassembling and rebuilding method, wherein the riverway blind culvert temporary water retaining structure comprises a steel pipe scaffold, a bagged soil bag, an inflatable safety air bag and an inclined strut; the steel pipe scaffold is of a multilayer structure, a bagged soil bag is filled in a lower sash of the steel pipe scaffold, weight pressing is carried out, and a lower water retaining structure is formed at the same time; an upper sash of the steel pipe scaffold is filled with an inflatable safety airbag to form an upper water retaining structure; the steel pipe scaffold is connected with an inclined strut and/or a throwing strut on the back water surface. The invention can realize quick assembly and quick water retaining, and can quickly recover the overflow section after weather or hydrological forecast.)

1. A river channel hidden culvert temporary water retaining structure capable of being rapidly disassembled is characterized by comprising a steel pipe scaffold, a bagged soil bag, an inflatable safety airbag and an inclined strut; the steel pipe scaffold is of a multilayer structure, a bagged soil bag is filled in a lower sash of the steel pipe scaffold, weight pressing is carried out, and a lower water retaining structure is formed at the same time; an upper sash of the steel pipe scaffold is filled with an inflatable safety airbag to form an upper water retaining structure; the steel pipe scaffold is connected with an inclined strut and/or a throwing strut on the back water surface.

2. The temporary watercourse culvert water retaining structure capable of being rapidly disassembled according to claim 1, wherein the temporary water retaining structure is arranged at a box culvert opening position close to a working surface or an existing inspection well position.

3. The temporary watercourse culvert water retaining structure capable of being quickly disassembled according to claim 1, wherein if a water leakage position exists in the upper water retaining structure formed by the inflatable safety airbag, a local plugging structure is used for plugging.

4. The temporary water retaining structure for the river channel culvert, which can be quickly disassembled according to claim 1, wherein the steel pipe scaffold is a double-row fastener type steel pipe scaffold.

5. The temporary watercourse culvert water retaining structure capable of being rapidly disassembled according to claim 1, wherein anti-floating steel pipes are installed at the top layer of the lattice space of the steel pipe scaffold to prevent the inflatable safety airbag from floating upwards under the action of water conservancy.

6. A method for constructing a temporary water retaining structure for a concealed culvert of a river channel, which can be quickly disassembled; the method is characterized by comprising the following steps:

(1) building a support structure and performing space segmentation by taking the steel pipe scaffold as a frame, wherein the steel pipe scaffold forms a lattice-type section; the top of the steel pipe scaffold is fixed with the top of the culvert through an adjustable jacking, and the back water surface is provided with a throwing support and/or an inclined support to increase the overall anti-sliding and anti-overturning performance;

(2) manually placing bagged soil bags on the lowest layer of the lattice space of the steel pipe scaffold, wherein the bag feeding amount is 1/2-2/3 of the bag capacity, and before the bagged clay bags are fed, removing impurities at the bottom of a water-retaining structure in a dark culvert so as to reduce seepage; in the process of putting the bagged soil bags, the upper layer and the lower layer are required to be mutually staggered;

(3) an inflatable safety airbag is adopted to seal the upper layer of the lattice space, and local sealing measures are adopted if local water leakage exists during sealing; anti steel pipe that floats of lattice space top layer installation prevents that the gasbag from floating upward under the water conservancy effect.

7. The method for quickly disassembling and rebuilding the temporary watercourse culvert water retaining structure of claim 1 when encountering flood; the method is characterized in that when flood is predicted to occur, the following steps of temporary quick dismantling are carried out:

the inflatable safety airbag is deflated to rapidly remove the upper water retaining structure, only the balance weight clay bag at the lowest layer of the steel pipe scaffold needs to be carried, and the frame structure and the inclined strut of the steel pipe scaffold are reserved;

when the water retaining structure is restored after the flood, only the steps (2) and (3) of claim 7 need to be repeated.

Technical Field

The invention relates to a temporary water retaining structure for a hidden culvert of a river channel, which can be quickly disassembled and is suitable for the technical field of temporary water retaining design of hidden culvert and other limited space construction.

Background

When the non-robot underwater dredging mode is adopted for general dredging with the water hidden culvert, temporary water retaining structures are required to be arranged at construction sections so as to ensure the operation safety of construction personnel and machinery.

The existing temporary water retaining structure mainly comprises earth-rock cofferdams, concrete cofferdams, masonry cofferdams and steel sheet pile cofferdams. To this special operating mode of construction in the culvert of taking water to dark, because the river course dark culvert is the channel of floodwater, need consider during the construction that the rainwater that upstream came water or heavy rain caused collects and leads to the water level in the culvert to rise, influences the condition of floodwater safety, consequently need design the interim manger plate structure thing of river dark culvert that can supply quick dismantlement.

The steel sheet pile cofferdam is adopted for water retaining, and is generally used in soft soil areas. During construction, the steel sheet piles are driven into the soil layer to a certain depth. For the construction of the hidden culvert, the box culvert is of a box concrete structure or a concrete and cover plate structure, the bottom of the box culvert is generally of a concrete structure, and the steel sheet pile cofferdam can damage the structure of the culvert body and is not suitable for the construction of the hidden culvert.

The two structural forms of the concrete cofferdam and the masonry cofferdam are adopted for water retaining, and the two structures need a certain time to form strength. The concrete cofferdam needs to be dismantled by using a crushing machine, so that the structure of the culvert body is easily damaged; for the grouted stone cofferdam, the labor cost of construction is high, and the cofferdam is inconvenient to dismantle and is not suitable for the engineering

And (4) adopting an earth-rock cofferdam structure to fill and build the slope according to the designed slope ratio. Different from the construction of an earth-rock cofferdam in an open field by adopting an excavator or a loader, the construction method is not suitable for mechanized operation due to the space limitation of a dark culvert, has lower efficiency and is inconvenient to clear residual earth and rock. The earth and stone weirs structure conflicts with the aim of dredging the hidden culvert, and the construction amount is increased. On the basis, the box culvert cofferdam at the present stage is generally designed to be water retaining by adopting bagged soil, however, the form does not meet the requirement of quick disassembly, and Shenzhen 4.11 rainstorm events prove that the cofferdam form is not suitable for flood season and rainy season.

Therefore how to design a river course that can supply quick dismantlement secretly contains interim manger plate structure thing, when guaranteeing engineering construction safety, can guarantee quick recovery river course flood discharge section again, guarantee flood discharge safety is the problem that awaits the solution urgently.

Disclosure of Invention

The invention aims to solve the technical problem firstly to provide a temporary water retaining structure for a river channel culvert, which can be quickly disassembled, can realize quick assembly and quick water retaining, and can quickly recover an overflowing section after weather or hydrological forecast. Therefore, the invention adopts the following technical scheme:

a river channel hidden culvert temporary water retaining structure capable of being rapidly disassembled is characterized by comprising a steel pipe scaffold, a bagged soil bag, an inflatable safety airbag and an inclined strut; the steel pipe scaffold is of a multilayer structure, a bagged soil bag is filled in a lower sash of the steel pipe scaffold, weight pressing is carried out, and a lower water retaining structure is formed at the same time; an upper sash of the steel pipe scaffold is filled with an inflatable safety airbag to form an upper water retaining structure; the steel pipe scaffold is connected with an inclined strut and/or a throwing strut on the back water surface.

The steel pipe scaffold is widely understood to include both a narrow steel pipe scaffold and a steel support and arch system.

The filler in the bagged soil bag can be clay, and other waterproof structures which play a role of pressing and balancing weight can also be selected.

In the present invention, the size of the inflatable airbag may be any size, and is determined according to the size available on the market. When the upper water retaining structure is formed, a plurality of inflatable safety air bags are used, and the air bags are overlapped and are tightly squeezed to form the upper water retaining structure. Furthermore, the vertical steel pipe of scaffold sets up many according to the width of culvert, divides the culvert section into a plurality of little sections and carries out space treatment, can also set up the bracing steel pipe at the surface of a back of the body of scaffold to make these steel pipe structures play the effect of reinforcing and supplementary design to the upper portion water retaining structure that a plurality of air bag constitute.

Further, the temporary water retaining structure is arranged at the position of a box culvert opening hole close to the working face or the position of an existing inspection well.

Furthermore, if a water leakage part exists in an upper water retaining structure formed by the inflatable safety airbag, a local plugging structure is used for plugging.

Furthermore, the steel pipe scaffold is a double-row fastener type steel pipe scaffold; the steel pipe scaffold

Furthermore, anti steel pipe that floats is installed on steel pipe scaffold frame lattice space top layer, prevents to aerify air bag come up under the water conservancy effect.

The above further technical solutions can also be used in combination with each other.

The invention also aims to provide a construction method of the temporary water retaining structure for the river channel culvert, which can be quickly disassembled, can realize quick assembly and quick water retaining, and can quickly recover the overflowing section after weather or hydrological forecast. Therefore, the invention adopts the following technical scheme:

a method for constructing a temporary water retaining structure for a concealed culvert of a river channel, which can be quickly disassembled; the method is characterized by comprising the following steps:

(1) building a support structure and performing space segmentation by taking the steel pipe scaffold as a frame, wherein the steel pipe scaffold forms a lattice-type section; the top of the steel pipe scaffold is fixed with the top of the culvert through an adjustable jacking, and the back water surface is provided with a throwing support and/or an inclined support to increase the overall anti-sliding and anti-overturning performance;

(2) manually placing bagged soil bags on the lowest layer of the lattice space of the steel pipe scaffold, wherein the bag feeding amount is 1/2-2/3 of the bag capacity, and before the bagged clay bags are fed, removing impurities at the bottom of a water-retaining structure in a dark culvert so as to reduce seepage; in the process of putting the bagged soil bags, the upper layer and the lower layer are required to be mutually staggered;

(3) an inflatable safety airbag is adopted to seal the upper layer of the lattice space, and local sealing measures are adopted if local water leakage exists during sealing; anti steel pipe that floats of lattice space top layer installation prevents that the gasbag from floating upward under the water conservancy effect.

The invention further aims to provide a method for quickly disassembling and rebuilding the temporary water retaining structure of the river channel culvert when the temporary water retaining structure meets flood. Therefore, the invention adopts the following technical scheme:

a method for quickly disassembling and rebuilding a temporary water retaining structure of a hidden culvert of a river channel when the temporary water retaining structure meets flood; the method is characterized in that when flood is predicted to occur, the following steps of temporary quick dismantling are carried out:

the inflatable safety airbag is deflated to rapidly remove the upper water retaining structure, only the balance weight clay bag at the lowest layer of the steel pipe scaffold needs to be carried, and the frame structure and the inclined strut of the steel pipe scaffold are reserved;

and (3) when the water retaining structure is restored after the flood, only the steps (2) and (3) of the building method need to be repeated.

The invention can quickly establish the frame structure of a temporary water retaining building through the assembled steel pipe scaffold, and quickly form effective temporary water retaining by filling bagged soil at the lower part for pressing and balancing weight and filling the inflatable air bag at the upper part. When needing promptly to dismantle simultaneously, carry out the gassing fast to aerifing the gasbag, only need clear up the clay bag that presses the counter weight, remain steel pipe frame construction, can reach and demolish fast, resume the sectional effect of flood discharge rapidly, improved the construction speed of building the facility temporarily, reduced personnel and the goods and materials input of engineering preparation, saved the engineering investment, provide feasible scheme for realizing fast switch over to different operating modes.

Drawings

FIG. 1 is a front view of a temporary water retaining structure for a concealed culvert of a river channel, which can be quickly disassembled by the device of the invention;

FIG. 2 is a side view of a temporary water retaining structure for a concealed culvert of a river channel, which can be quickly disassembled by the device of the present invention;

fig. 3 is a top view of the temporary water retaining structure for the river channel culvert, which can be quickly disassembled by the device of the invention.

Detailed Description

Reference is made to the accompanying drawings. The river channel hidden culvert temporary water retaining structure capable of being rapidly disassembled is arranged at a box culvert opening position close to an operation surface or the position of an existing inspection well, and consists of a steel pipe scaffold 1, a bagged clay bag 2, an inflatable safety airbag 3 and an inclined strut 4. The steel pipe scaffold 1 is of a multilayer structure, the lower sash 11 of the steel pipe scaffold 1 is filled with bagged soil to press and balance weight and form a lower water retaining structure, and the upper sash 12 is filled with the inflatable airbag 3 to quickly form an effective upper temporary water retaining structure. The steel pipe scaffold 1 is connected with an inclined strut 4 at the backwater side. The inclined strut 4 can be replaced by a throwing strut or added with the throwing strut. The inflatable airbag 3 is a reusable airbag that can be inflated and deflated repeatedly.

When the water retaining structure is implemented, the configuration amount of the lower water retaining structure only needs to meet the press fit weight required by the steel pipe scaffold, and the construction strength and the construction difficulty can be greatly reduced. And, different from the mode of putting the slope and stacking the clay bag, owing to formed steel pipe scaffold jacking force, the bagged clay bag is pressed and is joined in marriage the combined action system that gravity and bracing (and/or throw) are constituteed, and the clay height in bags for the packing obviously reduces to further reduced the engineering volume of preliminary work, improved the efficiency of personnel and goods and materials, also improved the speed of dismantling water retaining structure temporarily simultaneously, can in time deal with the flood.

The construction, temporary dismantling and rebuilding process of the invention is as follows:

(1) and calculating the weight requirement of the clay sand bag corresponding to the slip resistance and the overturning resistance of the temporary water retaining structure according to the current hydrological conditions, and calculating the height h1 of the 11 sash at the lowest layer according to the requirement and the width of the dark culvert.

(2) The water retaining height requirement of the water retaining building is determined according to the hydraulic calculation result or data provided by design, generally not lower than the sum of the still water level and the wave height of the design flood and the safe heightening of the top of the water retaining building, wherein the height of a 3-level building is 0.7m, and the height of a 4-level building is 0.5m according to the level of the water retaining building.

(3) Performing upper space segmentation according to the calculated water retaining height, wherein the space segmentation is based on the size of a repeatedly inflatable safety air bag which can be provided in the market, so as to obtain the actual number n of air bag layers and the height h2, h3 … of each layer;

(4) transporting steel pipe scaffold accessory to box culvert trompil position or current inspection shaft position that closes on the operation face, through harmful gas detection, possess down the culvert condition after, in the mode of handling by the crane or artifical transport is carried into the culvert, use diver (underwater operation) to build steel pipe skeleton, establish bearing structure and carry out space division, form the sectional steel pipe scaffold 1 of lattice formula, reference numeral 101 is the culvert bottom plate. When the water flow speed in the hidden culvert is not larger than 0.5m/s, the water flow speed is overlapped upwards layer by layer from the bottom of the structure, the upper structure is overlapped with the vertical rod until the top after the water retaining height is reached, the vertical rod is fixed and the stability is enhanced through the adjustable jacking 13 and the culvert top 102, and the jacking can be connected to the top of the steel pipe scaffold by adopting a threaded connection structure. When the steel pipe scaffold is erected, the lowermost layer can be used as a counter weight by adopting a bagged clay belt or the erection quality of the scaffold can be kept by adopting a hoop reinforcement temporary stabilization mode. After the above working procedures are finished, the inclined strut (and/or the throwing strut) is arranged on the back water surface to increase the integral anti-sliding and anti-overturning performance.

(5) After the steel pipe scaffold 1 is erected, the steel pipe frame below the water surface is reinforced by a scaffold worker in cooperation with a diver, and the steel pipe frame above the water surface is reinforced by an auxiliary scaffold worker in a general worker.

(6) The bagged clay bag 2 is transported into a culvert in a hoisting or manual transportation mode by a crane, a general worker assists a diver to transport the bagged clay bag into a steel frame at the lowest layer of a steel pipe scaffold until a first layer of steel pipe frame is filled, the bag feeding amount is 1/2-2/3 of the bag capacity, and sundries at the bottom of a water retaining structure in the hidden culvert are removed before the bagged clay bag 2 is fed, so that seepage is reduced; the bag opening of the bagged clay bag 2 is bound by hemp ropes and leveled. In the throwing process, the upper layer and the lower layer are required to be mutually staggered and stacked as neatly as possible. After the processes are completed, a combined action system consisting of steel pipe scaffold jacking force, bagged clay bag 2 press-fit gravity and inclined strut 4 (and/or throwing strut supporting force) is formed.

(7) The closed type safety air bags are transported into the culvert in a hoisting or manual transportation mode by a crane, and the safety air bags are transported to the upper steel tube sash 12 one by the aid of ordinary workers and are inflated. And forming an upper temporary water retaining structure after the inflation is finished, observing whether the upper temporary water retaining structure leaks water, adjusting the position of the safety airbag if the water leaks, and repairing the leakage by using a sand bag, wherein the construction is finished if the water does not leak or the water seepage amount is extremely small. Anti steel pipe 14 that floats is installed on lattice space top layer after the air bag installation, prevents that the gasbag from floating upward under the water conservancy effect.

(8) When a weather department or an upstream sends an alarm that flood occurs, the valve of the safety airbag is opened to deflate, a diver cooperates with ordinary workers to remove the bagged clay bag at the lower layer of the rigid pipe frame, the steel pipe scaffold 1 and the inclined strut 4 are reserved, then the diver leaves the hidden culvert, and the construction of the steps (6) and (7) is carried out after water passing or danger is relieved. The flood discharge section is contained in recoverable dark after above-mentioned process is accomplished, and the flood discharge ability in guarantee river course compares in the mode that puts the slope and stack the clay bag for dismantlement speed and construction volume have realized quick dismantlement, reduce personnel operating time in the culvert, reduce the requirement of engineering risk.

The number of layers and the positions of the lattice space are divided, and the shape of the inflatable air bag is schematic, so that the shape of the air bag (such as a circle, a square and the like) which is convenient to buy in the market can be adjusted according to the size of the hidden culvert section in actual use.

The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the relevant art are covered by the protection scope of the present invention.