A kind of underground space excavation interception and diversion structure containing inner river channel

Abstract

The present application relates to an interception and diversion structure for excavating an underground space containing an inner river channel, including an interception system and a diversion system. The interception system is arranged in a natural river channel, including two cofferdams and at least one pollution-blocking fence, and the two cofferdams are respectively located at the upstream and downstream of the natural river channel; the diversion system includes a diversion channel connected to the downstream of the natural river channel, a water collection well connected to the end of the diversion channel, and a pump for pumping water from the upstream of the river channel to the water collection well, and the pollution-blocking fence is located on the side of the pump away from the cofferdam. The present application intercepts and diverts the river channel before the construction of the underground space, wherein the river water side pressure that the cofferdam can withstand ensures the underground construction. The water collection well can store water on the one hand, and satisfy the drainage function during the flood season on the other hand. At the same time, the pollution-blocking fence can intercept large pollutants in the river water to prevent large pollutants from clogging the pump.

Description

Technical Field

[0001] The present application relates to the field of river channel construction, and in particular to an underground space excavation interception and diversion structure containing an inner river channel. Background Art

[0002] With the rapid development of the construction industry and the increasing scarcity of land, the utilization of underground space has become a trend, with the trend increasingly towards deeper underground spaces, such as parking garages and other functional areas. This is especially true when a river is located within the red line of a building site. Excavation and underground construction within the red line often interrupt the river. To ensure that the normal drainage function of the river is not affected, the original river channel must be intercepted and diverted as necessary, including interception methods, diversion methods, and corresponding structures.

[0003] In related art, when diverting a river, cofferdams are set up upstream and downstream to block the flow of water. Water is then pumped out of the construction site between the two cofferdams. Simultaneously, a diversion channel is excavated on the river bank to drain the upstream water downstream. Once the construction site is completed, the cofferdam is removed and the diversion channel is filled. Regarding the above-mentioned related art, the inventors discovered that the design of the diversion channel is insufficient to address flood drainage and flood discharge during the flood season. Summary of the Invention

[0004] In order to increase the drainage flow rate during diversion of a diversion channel, the present application provides an underground space excavation interception and diversion structure containing an inner river channel.

[0005] The present application provides an underground space excavation interception and diversion structure containing an inner river channel, which adopts the following technical solutions:

[0006] An underground space excavation interception and diversion structure containing an inner river channel, comprising an interception system and a diversion system.

[0007] The interception system is arranged in a natural river channel and includes two cofferdams and at least one trash boom, wherein the two cofferdams are respectively located upstream and downstream of the natural river channel;

[0008] The diversion system includes a diversion channel connected to the downstream of the natural river channel, a water collection well connected to the end of the diversion channel, and a water pump for pumping water from the upstream of the river channel to the water collection well. The dirt fence is located on the side of the water pump away from the cofferdam.

[0009] By adopting the above technical solution, two cofferdams enclose the construction site within the natural river channel. Water from the upper reaches of the natural river channel is pumped to a water collection well, which then flows from the water collection well to a diversion channel, and finally discharged downstream through the diversion channel. Before underground construction, the river channel is intercepted and diverted. The cofferdam can withstand the side pressure of the river water to ensure the progress of underground construction. The water collection well can not only store water, but also meet the drainage function during flood season. At the same time, the sewage fence is set on the side of the water pump away from the cofferdam. The sewage fence can intercept large pollutants in the river water and prevent them from clogging the water pump.

[0010] Preferably, the diversion channel includes a diversion trough foundation and a diversion trough body laid on the diversion trough foundation, and the diversion trough foundation is cast with reinforced concrete.

[0011] By adopting the above technical solution, the diversion trough foundation is cast with reinforced concrete. Reinforced concrete has high structural strength and compressive strength, is not easy to deform, and has a good supporting effect on the diversion trough body. The diverted river water acts on the diversion trough foundation through the diversion trough. The diversion trough foundation meets the bearing capacity requirements and can ensure the smooth diversion of the river water.

[0012] Preferably, the guide trough body is composed of a plurality of steel plates and steel back ribs, and the steel plates are welded to each other.

[0013] By adopting the above technical solution, the guide trough body adopts a combination of steel plates and steel back ribs. The steel plates are welded to each other and have good anti-leakage ability. The steel back ribs increase the stability of the steel plate setting, so that the guide trough body as a whole has a good supporting effect during drainage.

[0014] Preferably, a connecting angle steel is pre-buried in the water collection well, and the connecting angle steel is welded to the guide trough body.

[0015] By adopting the above technical solution, connecting angle steel is pre-buried in the water collection well, and the connecting angle steel can be welded to the diversion trough body, so that the connection between the water collection well and the diversion trough body is more stable and less prone to water leakage. Under the erosion of water flow, the diversion trough can still be firmly connected to the water collection well.

[0016] Preferably, the width of the guide trough body at the end close to the water collection well gradually increases along the direction of water flow.

[0017] By adopting the above technical solution, this design method enables the river water in the diversion trough to transition to the water collection well more smoothly.

[0018] Preferably, the guide trough body is configured to be U-shaped, and a safety net is provided on the upper portion thereof.

[0019] By adopting the above technical solution, the diversion trough is set into a U shape, which not only has the function of water storage, but also satisfies the diversion function, and is convenient for observation, maintenance and repair during the diversion period. At the same time, a safety net is installed on the top to ensure the safety of personnel and prevent people from accidentally entering the diversion trough.

[0020] Preferably, the cofferdam is composed of earth-rock bags and clay, and the earth-rock bags are respectively located on both sides of the clay.

[0021] By adopting the above technical solution, the cofferdam has a better water-retaining function, providing a good environment for the construction site. The clay is air-impermeable and water-impermeable, further improving the water-retaining effect.

[0022] Preferably, the cofferdam is arranged in a trapezoidal shape.

[0023] By adopting the above technical solution, the cofferdam is designed to be narrow at the top and wide at the bottom, so that the lower part of the cofferdam can withstand greater lateral pressure, ensuring that the cofferdam is strong and saves materials.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By intercepting and diverting the river before underground construction, the cofferdam can withstand the side pressure of the river water to ensure the progress of underground construction. The water collection well can not only store water, but also meet the drainage function during the flood season. At the same time, the trash fence is set on the side of the pump away from the cofferdam. The trash fence can intercept large pollutants in the river water and prevent them from clogging the pump.

[0026] 2. The diversion trough body is made of a combination of steel plates and steel back ribs. The steel plates are welded together to provide good water leakage prevention. The steel back ribs increase the stability of the steel plate setting, so that the diversion trough body as a whole has a good supporting effect during drainage.

[0027] 3. By pre-embedding connecting angle steel in the water collection well, the connecting angle steel can be welded to the diversion trough body, making the connection between the water collection well and the diversion trough body more stable and less prone to water leakage. Under the erosion of water flow, the diversion trough can still be firmly connected to the water collection well. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a plan view of the river interception and diversion according to an embodiment of the present application.

[0029] Figure 2 This is a plan view showing the cofferdam structure according to an embodiment of the present application.

[0030] Figure 3 It is a side view of the diversion channel of an embodiment of the present application.

[0031] Figure 4It is a schematic diagram of the top surface of the guide channel of an embodiment of the present application.

[0032] Figure 5 This is a schematic diagram showing the connection between the water collection well and the diversion trough body in an embodiment of the present application.

[0033] Figure 6 It is a cross-sectional schematic diagram of the water collection well in the embodiment of the present application.

[0034] Explanation of the accompanying symbols: 1. Interception system; 11. Cofferdam; 111. Earth and rock bags; 112. Clay; 12. Trash fence; 2. Diversion system; 21. Diversion channel; 211. Diversion trough foundation; 212. Diversion trough body; 2121. Steel plate; 2122. Steel back rib; 22. Collection well; 23. Water pump; 3. Natural river channel; 31. Upstream section of the river channel; 32. Downstream section of the river channel; 4. Safety net; 5. Connecting angle steel; 6. Reinforcement bracket. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The embodiment of the present application discloses an underground space excavation interception and diversion structure containing an inner river channel.

[0037] Reference Figure 1 and 2 A diversion structure for excavating an underground space containing an inner river channel includes a diversion system 1 and a diversion system 2. The diversion system 1 is set in a natural river channel 3, wherein the natural river channel 3 is divided into an upstream section 31 and a downstream section 32. The diversion system 1 is used to cut off the flow of water in the natural river channel 3 and enclose a construction area on the ground within the natural river channel 3. Construction is mainly carried out underground; the diversion system 2 is used to drain the river water in the upstream section 31 of the river channel to the downstream section of the river channel, so that the normal drainage function of the river is maintained during construction.

[0038] The interception system 1 includes a cofferdam 11 and a pollution fence 12. There are two cofferdams 11, which are respectively arranged in the upstream section 31 and the downstream section 32 of the river channel. A construction ground area is formed between the two cofferdams 11. The setting of the two cofferdams 11 allows the water in the construction ground area to remain still, and the construction ground can remain relatively still, reducing the impact of flowing water on the construction ground.

[0039] The cofferdam 11 is composed of earth and rock bags 111 and clay 112. The clay 112 is airtight and watertight, and has a good water-retaining effect. The earth and rock bags 111 are located on both sides of the clay 112, which can make the cofferdam 11 have a higher structural strength as a whole, so that the cofferdam 11 can withstand greater lateral pressure from the river water. The cofferdam 11 is set as a trapezoid as a whole, that is, it is narrow at the top and wide at the bottom, so that the lower part of the cofferdam 11 can withstand greater lateral pressure, ensure the strength of the cofferdam 11, and save materials. Reinforcement brackets 6 are clamped on both sides of the cofferdam 11, and the reinforcement brackets 6 mainly reinforce the structure of the cofferdam 11.

[0040] Reference Figure 1 and Figure 3 The interception system 1 includes a diversion channel 21 connected to the downstream section 32 of the river, a water collection well 22 connected to the diversion channel 21, and a pump 23 connected to the upstream section 31 of the river. The pump 23 pumps the river water from the upstream section 31 into the water collection well 22, which then discharges the water from the water collection well 22 to the diversion channel 21, and finally the diversion channel 21 discharges the river water to the downstream section 32 of the river. The trash fence 12 is located on the side of the pump 23 away from the cofferdam 11 of the upstream section 31 of the river. The trash fence 12 can be in the form of a mesh or metal bars and can intercept large pollutants in the river water to prevent them from clogging the pump 23.

[0041] The diversion channel 21 includes a diversion trough foundation 211 and a diversion trough body 212 laid on the diversion trough foundation 211. The diversion trough foundation 211 is cast with reinforced concrete. Reinforced concrete has high structural strength and compressive strength, is not easily deformed, and provides good support for the diversion trough body 212. The diversion trough body 212 is composed of multiple steel plates 2121 and steel back ribs 2122. The steel back ribs 2122 are made of channel steel and angle steel. The steel plates 2121 are laid along the diversion trough foundation 211, and adjacent steel plates 2121 are welded to each other. The steel back ribs 2122 support and reinforce the steel plates 2121, ensuring strong connection strength between the steel plates 2121, and can withstand large river water discharge during flood season.

[0042] Reference Figure 3 and Figure 4 The guide trough body 212 is U-shaped as a whole. The U-shaped design enables the guide trough body 212 to have both water storage function and diversion function, and is convenient for observation, maintenance and repair during diversion. A safety net 4 is installed on the upper part of the guide trough body 212 to ensure the safety of personnel and prevent them from accidentally entering the guide trough. Figure 5 The width of the guide trough body 212 at the end close to the water collection well 22 gradually increases along the water flow direction, so that the river water in the guide trough can be more smoothly transferred to the water collection well 22.

[0043] Reference Figure 6 A connecting angle steel 5 is embedded in the water collection well 22, and the connecting angle steel 5 is welded to the end of the steel plate 2121 in the guide trough body 212, so that the connection between the water collection well 22 and the guide trough body 212 is more stable and not prone to water leakage. Under the erosion of water flow, the guide trough can still be firmly connected to the water collection well 22.

[0044] The implementation principle of the diversion and interception structure for excavating an underground space containing an inner river channel in the embodiment of the present application is as follows: two cofferdams 11 enclose a construction site in a natural river channel 3, and the water in the upper reaches of the natural river channel 3 is pumped to a water collection well 22 by a pump 23, and then flows from the water collection well 22 to a diversion channel 21, and finally discharged to the downstream through the diversion channel 21. Before the construction of the underground space, the river channel is intercepted and diverted, wherein the cofferdam 11 can withstand the side pressure of the river water, ensuring that during the underground construction process, the water collection well 22 can play the role of water storage on the one hand, and can meet the drainage function during the flood season on the other hand. At the same time, the dirt fence 12 is set to the side of the pump 23 away from the cofferdam 11. The dirt fence 12 can intercept large pollutants in the river water to prevent large pollutants from clogging the pump 23.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A diversion structure for excavating an underground space containing an inner river channel, comprising a diversion system (1) and a diversion system (2), The interception system (1) is arranged in a natural river channel (3), comprising two cofferdams (11) and at least one trash fence (12), wherein the two cofferdams (11) are respectively located upstream and downstream of the natural river channel (3); The diversion system (2) comprises a diversion channel (21) connected to the downstream of the natural river channel (3), a water collection well (22) connected to the end of the diversion channel (21), and a pump (23) for pumping water from the upstream of the river channel to the water collection well (22), wherein the dirt fence (12) is located on a side of the pump (23) away from the cofferdam (11); The diversion channel (21) comprises a diversion trough foundation (211) and a diversion trough body (212) laid on the diversion trough foundation (211), wherein the diversion trough foundation (211) is cast using reinforced concrete; The guide trough body (212) is composed of a plurality of steel plates (2121) and steel back ribs (2122), and the steel plates (2121) are welded to each other; A connecting angle steel (5) is pre-buried in the water collection well (22), and the connecting angle steel (5) is welded to the guide trough body (212).

2. The underground space excavation interception and diversion structure containing an inner river channel according to claim 1, characterized in that: The width of the guide groove body (212) at the end close to the water collection well (22) gradually increases along the water flow direction.

3. The underground space excavation interception and diversion structure containing an inner river channel according to claim 1, characterized in that: The guide trough body (212) is arranged in a U shape, and a safety net (4) is arranged on the upper part thereof.

4. The underground space excavation interception and diversion structure containing an inner river channel according to claim 1, characterized in that: The cofferdam (11) is composed of earth-rock bags (111) and clay (112), and the earth-rock bags (111) are respectively located on both sides of the clay (112).

5. The underground space excavation interception and diversion structure containing an inner river channel according to claim 1, characterized in that: The cofferdam (11) is arranged in a trapezoidal shape.

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