Drainage sedimentation tank for foundation pit construction

Abstract

The utility model relates to the technical field of highway construction, and particularly discloses a foundation pit construction drainage sedimentation tank which comprises a sedimentation tank body, a plurality of hydraulic jacks are fixedly arranged at the top end of the sedimentation tank body, and a steel plate covering the sedimentation tank body is jointly supported by the top ends of the hydraulic jacks. The bottom end of the steel plate is detachably connected with an isolation frame matched with the inner side of the sedimentation tank in shape, and the isolation frame can be arranged in the sedimentation tank in a matched mode. The sedimentation tank is separated by the isolation frame, sewage is settled in the isolation frame, sediments are deposited in the isolation frame, and the isolation frame with the sediments is directly replaced by the clean isolation frame when the sediments are cleaned, so that the time for directly cleaning the sedimentation tank is saved, and the construction progress is prevented from being prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of highway construction, in particular to a drainage sedimentation tank for foundation pit construction. Background Art

[0002] During subway construction, water accumulation in the foundation pit is a major factor affecting construction progress. This water must be promptly drained during construction. Based on site conditions and the distribution of surface water systems, groundwater generally flows and drains from west to east, ultimately converging into the Dasha River. During subway construction, numerous pipelines surround the foundation pit, making culvert management difficult. Furthermore, the pit water contains a large amount of sediment, and direct discharge of this sediment would affect the normal operation of the municipal drainage network.

[0003] To prevent foundation pit drainage from impacting the normal operation of the municipal drainage network, a Chinese utility model patent with publication number "CN215759107U" discloses a foundation pit drainage system. This system utilizes a collection channel along the perimeter of the foundation pit, allowing water to flow in naturally, eliminating the need for additional diversion ditches. A sump is also located within the collection channel to meet the required water level for the water pump. Sedimentation tanks are installed to reduce sediment in the foundation pit, allowing the settled water to be directly discharged into the municipal drainage network. Sedimentation tanks can quickly accumulate sediment during drainage, requiring frequent cleaning. Existing cleaning methods involve closing the inlet valve, draining the tank, and then using a sludge suction machine to remove the sludge from the bottom of the tank, excavators and grabbers to excavate and remove the sediment, or high-pressure water jets to flush the tank walls and bottom. The powerful impact of the high-pressure water jets effectively removes dirt and biofilm adhering to the tank surface. These cleaning methods directly clean the sedimentation tank itself, which takes a long time and delays construction schedules. Utility Model Content

[0004] The purpose of the utility model is to provide a drainage sedimentation tank for foundation pit construction, so as to solve the problem that the cleaning of the sedimentation tank itself takes a long time, thus prolonging the construction progress.

[0005] In order to solve the above problems, the technical solutions provided are as follows:

[0006] A drainage sedimentation tank for foundation pit construction includes a sedimentation tank, wherein a plurality of dry hydraulic jacks are fixedly installed on the top of the sedimentation tank, the tops of the plurality of hydraulic jacks jointly support a steel plate covering the sedimentation tank, and the bottom end of the steel plate is detachably connected to an isolation frame adapted to the shape of the inner side of the sedimentation tank, and the isolation frame can be adapted and placed in the sedimentation tank.

[0007] The basic principle of the above technical solution is that: sewage is discharged into the sedimentation tank, and the isolation frame separates the sewage from the sedimentation tank. The sewage is precipitated in the isolation frame, and the precipitated sludge and sand are all in the isolation frame. The sedimentation tank provides strength support for the isolation frame. When the sediment accumulated in the isolation frame needs to be cleaned, the water in the frame is drained, and the hydraulic jack is started to lift the steel plate. The isolation frame with the sediment can be lifted out of the sedimentation tank, and then the isolation frame is removed from the steel plate, and a clean isolation frame is replaced and placed on the steel plate. The hydraulic jack is started to place the replaced isolation frame in the sedimentation tank, and the sedimentation tank can continue to operate.

[0008] The beneficial effect of the above technical solution is that, compared with the existing method of directly discharging sewage into the sedimentation tank, this technical solution uses an isolation frame to separate the sedimentation tank, the sewage is precipitated in the isolation frame, and the sediment is deposited in the isolation frame. When cleaning the sediment, a clean isolation frame is directly used to replace the isolation frame with sediment, saving the time of directly cleaning the sedimentation tank and avoiding delays in the construction progress.

[0009] Furthermore, the isolation frame is made of welded steel plates. The steel isolation frame has high strength, can withstand large external pressure and impact, and can be recycled.

[0010] Furthermore, the isolation frame is fixedly connected to the bottom of the steel plate via a flange. The flange connection method is convenient for disassembly and has a firm connection.

[0011] Furthermore, the sedimentation tank is a multi-stage sedimentation tank, each sedimentation tank is separated by a partition, and the top of each sedimentation tank is provided with a suspended baffle with a channel reserved with the bottom of the sedimentation tank, and the top of the suspended baffle is detachably connected to the bottom of the steel plate.

[0012] Furthermore, there are a total of six hydraulic jacks, two of which are symmetrically distributed at the entrance of the sedimentation tank, another two are symmetrically distributed at the exit of the sedimentation tank, and the last two are symmetrically distributed at the front and back sides of the sedimentation tank. Multiple hydraulic jacks working together can stably lift the steel plate.

[0013] Furthermore, a placement groove is provided at the upper end of the sedimentation tank, and the hydraulic jack is fixed in the placement groove by bolts. The placement groove can stably limit the stable operation of the hydraulic jack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a top view of the sedimentation tank structure of the present invention (with the steel plate mesh omitted);

[0015] Figure 2 This is a structural cross-sectional view of the isolation frame of the utility model placed in a sedimentation tank;

[0016] Figure 3 This is a structural cross-sectional view of the isolation frame of the utility model when it is outside the sedimentation tank.

[0017] The reference numerals in the drawings of the specification include: placement tank 1, hydraulic jack 2, steel plate 3, isolation frame 4, water inlet tank 5, sedimentation tank 6, water outlet tank 7, partition 8, suspended baffle 9. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] The embodiment is basically as shown in the attached Figure 1-3 As shown:

[0020] A drainage sedimentation tank 6 for foundation pit construction, as shown in 1, includes a sedimentation tank 6, an inlet is provided in the middle of the left end of the sedimentation tank 6, an outlet is provided in the middle of the right end of the sedimentation tank 6, the outer layer of the bottom and the surrounding area of the sedimentation tank 6 is a plain concrete layer, and the inner layer of the surrounding area is a brick layer. A total of six placement grooves 1 are provided at both ends of the inlet, both ends of the outlet and the center of the top of the front and back sides of the sedimentation tank 6. As shown in 2, six hydraulic jacks 2 are fixedly installed in the six placement grooves 1 at the top of the sedimentation tank 6 by bolts, two of which are symmetrically distributed at the inlet of the sedimentation tank 6, the other two are symmetrically distributed at the outlet of the sedimentation tank 6, and the last two are symmetrically distributed on the front and back sides of the sedimentation tank 6. The tops of the six hydraulic jacks 2 jointly support a steel plate 3 covering the top of the sedimentation tank 6, and the bottom end of the steel plate 3 is connected to an isolation frame 4 adapted to the shape of the inner side of the sedimentation tank 6 through a flange. The isolation frame 4 is made of welded steel plates, and the isolation frame 4 can be adapted to be placed in the sedimentation tank 6. The sedimentation tank 6 is a three-stage sedimentation tank 6, which includes an inlet tank 5, a sedimentation tank 6 and an outlet tank 7. Each level of sedimentation tank 6 is separated by a partition 8. The top of each level of sedimentation tank 6 is provided with a suspended baffle 9 with a channel reserved with the bottom of the sedimentation tank 6. The top of the suspended baffle 9 is provided with an ear plate, and the ear plate is bolted to the bottom end of the steel plate 3.

[0021] The specific implementation process is as follows:

[0022] The sewage is discharged into the sedimentation tank 6 from the inlet. The isolation frame 4 separates the sewage from the sedimentation tank 6. The sewage is precipitated in the isolation frame 4. The precipitated sludge and gravel are all in the isolation frame 4. The sedimentation tank 6 provides strength support for the isolation frame 4. When the sediment accumulated in the isolation frame 4 needs to be cleaned, the water in the frame is drained and the hydraulic jack 2 is started to lift the steel plate 3. Figure 3 As shown, the isolation frame 4 with sediment can be lifted out of the sedimentation tank 6, then the isolation frame 4 is removed from the steel plate 3 and replaced with a clean isolation frame 4 and placed on the steel plate 3. The hydraulic jack 2 is then activated to place the replaced isolation frame 4 into the sedimentation tank 6, and the sedimentation tank 6 can then continue to operate. This solution uses the isolation frame 4 to separate the sedimentation tank 6, allowing sewage to settle in the isolation frame 4 and sediment to accumulate in the isolation frame 4. When cleaning the sediment, the clean isolation frame 4 can be directly used to replace the isolation frame 4 with sediment, saving time in directly cleaning the sedimentation tank 6 and avoiding delays in the construction schedule.

[0023] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A foundation pit construction drainage sedimentation tank, comprising a sedimentation tank, characterized in that: Several hydraulic jacks are fixedly installed on the top of the sedimentation tank. The tops of several hydraulic jacks jointly support a steel plate covering the sedimentation tank. The bottom of the steel plate is detachably connected to an isolation frame that matches the shape of the inner side of the sedimentation tank. The isolation frame can be adapted and placed in the sedimentation tank.

2. A foundation pit construction drainage sedimentation tank according to claim 1, characterized in that : The isolation frame is made of welded steel plates.

3. A foundation pit construction drainage sedimentation tank according to claim 2, characterized in that: The isolation frame is fixedly connected to the bottom of the steel plate through a flange.

4. A foundation pit construction drainage sedimentation tank according to claim 3, characterized in that: The sedimentation tank is a multi-stage sedimentation tank, each of which is separated by a partition. The top of each sedimentation tank is provided with a suspended baffle with a channel reserved with the bottom of the sedimentation tank. The top of the suspended baffle is detachably connected to the bottom of the steel plate.

5. A foundation pit construction drainage sedimentation tank according to claim 4, characterized in that: There are six hydraulic jacks in total, two of which are symmetrically distributed at the entrance of the sedimentation tank, another two are symmetrically distributed at the outlet of the sedimentation tank, and the last two are symmetrically distributed at the front and back sides of the sedimentation tank.

6. A foundation pit construction drainage sedimentation tank according to claim 5, characterized in that: The upper end of the sedimentation tank is provided with a placement groove, and the hydraulic jack is fixed in the placement groove by bolts.

Images