Water interception and drainage device of deep foundation pit along river

Abstract

The utility model relates to building construction, in particular to a water interception and drainage device for a deep foundation pit along a river. Comprising a steel jacket and a water pump, the steel jacket comprises a water collecting and draining tank and a plurality of jacket standard sections, the water collecting and draining tank and the plurality of jacket standard sections define a closed ring, each jacket standard section is of a hollow structure, every two adjacent jacket standard sections are communicated, and the water collecting and draining tank is communicated with the jacket standard sections on the two sides of the water collecting and draining tank; water seepage holes are formed in a bottom plate and an outer wall plate of the pouring jacket standard section and communicated with an inner cavity of the pouring jacket standard section, a water pump is installed in the water collecting and draining tank and communicated with a water draining pipe, and the water draining pipe penetrates through the water collecting and draining tank. The device realizes automatic collection and pumping drainage of seepage water at the bottom of the foundation pit, reduces the dewatering workload of the foundation pit, reduces the construction cost, is convenient to construct and mount, can be repeatedly used, improves the construction efficiency and saves resources.

Description

Technical Field

[0001] The utility model relates to building construction, in particular to a water interception and drainage device for a deep foundation pit along a river. Background Art

[0002] When constructing deep foundation pits near rivers, dense pile rows or curtain supports are often used to consider the water-stopping effect. However, due to the proximity to rivers and high groundwater levels, the water-stopping effect of the support structure alone is not ideal, and other precipitation measures or open drainage of water collection are required. This greatly increases the additional workload of foundation pit construction, and requires manual monitoring of water levels and control of drainage, which is inefficient. The Chinese utility model with authorization announcement number CN209585079U discloses a drainage enclosure structure for the lowered beam of a subway station. The utility model has a drainage ditch between the cushion layer and the steel casing, and a vertical pipe well is set in the drainage ditch. The construction volume of the utility model is large. Utility Model Content

[0003] The utility model aims to solve the above technical problems, thereby providing a water interception and drainage device for a deep foundation pit along a river, which can realize automatic collection and drainage of seepage water at the bottom of the foundation pit.

[0004] The utility model solves the technical problem and adopts the following technical solution:

[0005] A water interception and drainage device for a deep foundation pit along a river, comprising a steel casing and a water pump. The steel casing comprises a water collecting and drainage box and a multi-section casing standard section. The water collecting and drainage box and the multi-section casing standard section are arranged in a closed ring. Each of the casing standard sections is a hollow structure. Two adjacent casing standard sections are connected. The water collecting and drainage box is connected to the casing standard sections on both sides of the water collecting and drainage box. The bottom plate and the outer wall plate of the casing standard section are both provided with seepage holes, and the seepage holes are connected to the inner cavity of the casing standard section. A water pump is installed in the water collecting and drainage box, and the water pump is connected to a drainage pipe, and the drainage pipe runs through the water collecting and drainage box.

[0006] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0007] 1) Automatically collect and drain seepage water from the bottom of the foundation pit, reduce the workload of foundation pit dewatering, and reduce construction costs;

[0008] 2) It is convenient to monitor water level and reduce the input of manpower and monitoring equipment;

[0009] 3) It is easy to construct and install and can be reused, which improves construction efficiency and saves resources.

[0010] Further, the optimization scheme of the utility model is:

[0011] The casing standard section includes a right-angle standard section and a flat plate standard section.

[0012] The flat plate standard section comprises a long plate standard section and a short plate standard section, wherein the short plate standard section is located at both sides of the water collecting and drainage box and is fixedly connected to the water collecting and drainage box.

[0013] The adjacent casing standard sections are connected by a socket structure, and the adjacent casing standard sections are fixedly connected by bolts.

[0014] Rubber water-stopping pads are installed between adjacent standard sections of the casing.

[0015] A filter screen is attached to the side of the water seepage hole of the standard section chamber of the casing.

[0016] A float is installed in the water collection and drainage box, and a water level observation scale is installed on the float and penetrates the top plate of the water collection and drainage box.

[0017] The top plate of the water collecting and drainage box is provided with an observation window.

[0018] The steel casing is in the form of a square ring, a rectangular ring or a circular ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0020] Figure 2 This is the schematic diagram of the standard section connection of the casing;

[0021] Figure 3 This is a schematic diagram of the interior of the water collection and drainage box.

[0022] In the figure: casing standard section 1; flat plate standard section 1-1; long plate standard section 1-1-1; short plate standard section 1-1-2; right angle standard section 1-2; seepage hole 1-3; water collection and drainage box 2; observation window 2-1; rubber water stop pad 3; connecting bolt 4; water pump 5; drainage pipe 6; water level observation scale 7. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1 , Figure 2 , Figure 3 This embodiment provides a water interception and drainage device for a deep foundation pit along a river, which is mainly composed of a steel casing, a water pump 5 and a drainage pipe 6. The steel casing is mainly composed of a multi-section casing standard section 1 and a water collection and drainage box 2. The multi-section casing standard section 1 and the water collection and drainage box 2 are arranged in a closed ring. The steel casing is in a square ring, a rectangular ring or a circular ring. In this embodiment, a rectangular ring is preferred. The surfaces of the casing standard section 1 and the water collection and drainage box 2 are sprayed with anti-rust paint.

[0025] Each casing standard section 1 is a hollow structure. There are two types of casing standard sections 1, namely, flat plate standard section 1-1 and right angle standard section 1-2. Flat plate standard section 1-1 has two specifications, namely, long plate standard section 1-1-1 and short plate standard section 1-1-2. The dimensions of long plate standard section 1-1-1 are: length 1 meter, height 1 meter, width 0.5 meter. Short plate standard section 1-1-2 is located on both sides of water collection and drainage box 2. Short plate standard section 1-1-2 is connected and fixedly connected to water collection and drainage box 2. The size and quantity of casing standard section 1 can be used in combination according to the size of foundation pit.

[0026] The inner cavities of two adjacent casing standard sections 1 are connected, and the two adjacent casing standard sections 1 are connected by a socket structure. The socket of the casing standard section 1 is installed with a rubber waterstop pad 3. The length of the rubber waterstop pad 3 is 50 cm. The rubber waterstop pad 3 plays a role in sealing and waterproofing the connection to prevent water seepage at the connection. The sockets between adjacent casing standard sections 1 are fixedly connected by connecting bolts 4. A total of 3 groups of connecting bolts 4 are arranged at each connection. Sealing pads are installed on the inner sides of the nuts and nuts of the connecting bolts 4.

[0027] The bottom plate and outer wall plate of each casing standard section 1 are provided with seepage holes 1-3, which are circular and densely distributed. The seepage holes 1-3 are connected to the chamber of the casing standard section 1. The seepage holes 1-3 of the chamber of the casing standard section 1 are attached with filter screens, which are respectively located on the upper plate surface of the bottom plate and the inner wall surface of the outer wall plate of the casing standard section 1. River water and groundwater can seep into the chamber of the casing standard section 1 of the steel casing through the seepage holes 1-3, and a dense filter screen is arranged on the inner wall of the seepage hole 1-3 distribution area, which prevents the sediment and large particles in the water body from flowing into the steel casing. The inner wall plate of the casing standard section 1 is a closed structure to prevent water from seeping into the bottom of the pit.

[0028] The water collection and drainage box 2 is a square box, and its cross-sectional dimensions and height are larger than those of the standard casing section 1. The water collection and drainage box 2 has a water storage function, and the top plate of the water collection and drainage box 2 is provided with an upper cover, which can be opened. A water pump 5 is installed at the bottom of the water collection and drainage box 2, and the water pump 5 is fixed on the inner wall of the water collection and drainage box 2. The water outlet of the water pump 5 is connected to the lower end of the drain pipe 6, and the upper end of the drain pipe 6 passes through the top plate of the water collection and drainage box 2. The drain pipe 6 adopts a hose, and its length can be extended as needed. The collected water is discharged into a designated location through the drain pipe 6.

[0029] The water pump 5 has an automatic water level monitoring opening and closing function, and automatically starts pumping water when the specified water level is reached, and automatically closes when the water level in the water collection and drainage box 2 is lower than the set water level. A water level sensor can also be installed in the water collection and drainage box 2, and the water level sensor and the water pump 5 are electrically connected to the control system respectively to achieve automatic drainage.

[0030] A float is installed in the water collection and drainage box 2, and a water level observation scale 7 is installed on the float. The upper end of the water level observation scale 7 penetrates the top plate of the water collection and drainage box 2. The float and the water level observation scale 7 can float up and down with the water level in the box, which is convenient for directly observing the water collection in the monitoring box. An observation window 2-1 is opened on the top plate of the water collection and drainage box 2. The observation window 2-1 is a glass window, which is convenient for construction personnel to observe the water storage and drainage device operation in the box.

[0031] The use process of this embodiment is as follows: after the foundation pit support and excavation are completed, a pit with a depth of 1 meter and a width of 0.8 meters is excavated downward along the four sides of the foundation pit bottom. The excavation pit should be set with a slope so that the water collection and drainage box 2 is located at the lowest point of the pit. The standard section 1 of the casing is placed and connected according to the size of the foundation pit. Finally, the water collection and drainage box 2 is installed and connected. The top plate of the water collection and drainage box 2 should be exposed at the bottom of the pit for easy opening and closing and observation. After the overall installation of the device is completed, the pit gap is backfilled, the surface is repaired and leveled, and it does not affect the construction of the foundation pit bottom. After the installation is completed and the power supply is connected, the river water and groundwater outside the pit can be waited for infiltration. After the water in the water collection and drainage box 2 reaches the specified water level, the water pump 5 automatically starts to pump out the accumulated water, and the inner wall plate of the standard casing section 1 can block the seepage, ensuring that the foundation pit working environment is dry, and the construction personnel can monitor the water level in real time through the observation window 2-1 on the top of the water collection and drainage box 2 and the water level observation scale 7. After the foundation pit construction is completed, the device can be dismantled and the foundation pit can be backfilled, and it can be recycled and used next time.

[0032] This device can be used for the drainage and precipitation of bottom seepage water during the construction of deep foundation pits near rivers or with high groundwater levels. It can achieve a closed water-isolating effect and centralized automatic drainage of seepage water, ensuring dry operation of the foundation pit and preventing safety accidents caused by pit bottom seepage leading to pit collapse.

[0033] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent structural changes made using the contents of the present utility model specification and drawings are included in the scope of rights of the present utility model.

Claims

1. A water interception and drainage device for a deep foundation pit along a river, comprising a steel casing and a water pump, characterized in that: The steel casing includes a water collection and drainage box and a multi-section casing standard section, the water collection and drainage box and the multi-section casing standard section are arranged in a closed ring, each casing standard section is a hollow structure, two adjacent casing standard sections are connected, and the water collection and drainage box is connected to the casing standard sections on both sides of the water collection and drainage box; The bottom plate and outer wall plate of the standard section of the casing are both provided with seepage holes, which are connected to the inner cavity of the standard section of the casing. A water pump is installed in the water collection and drainage box, which is connected to a drainage pipe, and the drainage pipe runs through the water collection and drainage box.

2. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: The casing standard section includes a right-angle standard section and a flat plate standard section.

3. The water interception and drainage device for a deep foundation pit along a river according to claim 2, characterized in that: The flat plate standard section comprises a long plate standard section and a short plate standard section, wherein the short plate standard section is located at both sides of the water collecting and drainage box and is fixedly connected to the water collecting and drainage box.

4. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: The adjacent casing standard sections are connected by a socket structure, and the adjacent casing standard sections are fixedly connected by bolts.

5. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: Rubber water-stopping pads are installed between adjacent standard sections of the casing.

6. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: A filter screen is attached to the side of the water seepage hole of the standard section chamber of the casing.

7. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: A float is installed in the water collection and drainage box, and a water level observation scale is installed on the float and penetrates the top plate of the water collection and drainage box.

8. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: The top plate of the water collecting and drainage box is provided with an observation window.

9. The water interception and drainage device for a deep foundation pit along a river according to claim 1, characterized in that: The steel casing is in the form of a square ring, a rectangular ring or a circular ring.

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