Recyclable drainage ditch around foundation pit and construction method

Abstract

The invention provides a recyclable drainage ditch around a foundation pit and a construction method.The recyclable drainage ditch is formed by splicing a plurality of drainage ditch units, each drainage ditch unit comprises a drainage ditch body, a pressure-bearing anti-skid cover plate, a rubber pad, a filter screen and a U-shaped connecting plate, and the pressure-bearing anti-skid cover plate is arranged at the upper end of the drainage ditch body; the rubber pad is arranged at the contact position of the pressure-bearing anti-skid cover plate and the drainage ditch body, the filter screen is arranged in the drainage ditch body, and the drainage ditch units are connected through the U-shaped connecting plates. The anti-seepage drainage ditch has the advantages that the water baffles are arranged in the road surfaces on the two sides of the drainage ditch body and embedded into concrete when the road surfaces are hardened, the overall anti-seepage performance is enhanced, and surface water is effectively prevented from flowing into a foundation pit; the drainage ditch body at the turning position of the drainage ditch is designed to be arc-shaped, sediment accumulation is avoided, and the blocking risk is reduced; the drainage ditch units are connected through the U-shaped connecting plates and fixed through the rivets, and the connecting portions are sealed through the sealant, so that the leakage risk is reduced.

Description

Technical Field

[0001] The invention belongs to the field of building engineering construction, and in particular relates to a recyclable drainage ditch around a foundation pit and a construction method. Background Art

[0002] During the construction of foundation pit support, in order to prevent surface water from entering the foundation pit, causing the support structure to be eroded, or surface water from infiltrating the support structure, affecting the stability of the support structure and causing safety hazards, especially in the expansive soil area, attention should be paid to soil sealing and anti-seepage, and interception and drainage work must be done well. Usually, an interception ditch is set outside the water-stop curtain at the top of the foundation pit. At the same time, after the excavation of the foundation pit is completed, in order to ensure that the groundwater and rainwater at the bottom of the pit do not affect the foundation construction and can be discharged in a centralized manner, drainage ditches are set around the bottom of the pit for drainage and drainage. The most common method of constructing interception and drainage ditches is brickwork and concrete drainage ditches. Brickwork drainage ditches will crack and break with the settlement of the foundation pit, and cracks are prone to occur at the joints between the surface and the hardened road surface, causing surface water to infiltrate, affecting the stability of the support structure, and requiring frequent repairs; concrete cast-in-place interception and drainage ditches have high ditch strength, but require the construction of concrete cushions, formwork, and concrete pouring. The process is relatively complicated, and the input material and labor costs are high. It is usually not a priority in temporary projects.

[0003] Ordinary finished drainage ditches are usually made of cast iron, polymer, plastic, concrete, etc., which are prone to foundation pit settlement problems and thus have an adverse effect on the ditch. Ordinary finished drainage ditches are linear, straight groove type, and right-angle connections at corners are not conducive to smooth drainage and are prone to sediment accumulation. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a recyclable drainage ditch around a foundation pit and a construction method, which is particularly suitable for intercepting and draining water after the excavation of the foundation pit is completed.

[0005] The technical solution adopted by the present invention is: in the first aspect, a recyclable drainage ditch around a foundation pit is provided, the drainage ditch unit includes a drainage ditch body, a pressure-bearing anti-slip cover plate, a rubber pad, a filter screen and a U-shaped connecting plate, the pressure-bearing anti-slip cover plate is arranged at the upper end of the drainage ditch body, the rubber pad is arranged at the contact point between the pressure-bearing anti-slip cover plate and the drainage ditch body, the filter screen is arranged inside the drainage ditch body, and the drainage ditch units are connected by the U-shaped connecting plate.

[0006] Furthermore, the drainage ditch body adopts an arc-shaped corner structure at the turning point.

[0007] Furthermore, water retaining plates are provided in the road surface on both sides of the drainage ditch body.

[0008] Furthermore, the drainage ditch body and the U-shaped connecting plate are connected by rivets.

[0009] Furthermore, the pressure-bearing anti-slip cover plate is provided with dense mesh holes.

[0010] In a second aspect, a construction method for a recyclable drainage ditch around a foundation pit is provided, comprising:

[0011] After laying the sand cushion layer at the bottom of the ditch, placing the drainage ditch body at the predetermined position;

[0012] Using the U-shaped connecting plate to connect adjacent drainage ditch bodies with rivets;

[0013] Performing sealing treatment on the connection portion between the drainage ditch body and the U-shaped connection plate;

[0014] Backfilling both sides of the drainage ditch body;

[0015] The road surface on both sides of the drainage ditch body is hardened and embedded with the water retaining plate;

[0016] The filter screen, the rubber pad and the pressure-bearing anti-slip cover plate are sequentially installed on the drainage ditch body.

[0017] The advantages and positive effects of the present invention are as follows: due to the adoption of the above technical scheme, water retaining plates are arranged in the road surface on both sides of the drainage ditch body, and the water retaining plates are embedded in the concrete when the road surface is hardened, thereby enhancing the overall anti-seepage performance and effectively preventing surface water from flowing into the foundation pit; the drainage ditch body at the turning point of the drainage ditch is designed to be arc-shaped, thereby avoiding sediment accumulation, ensuring smooth water flow, and reducing the risk of blockage; a filter screen is added to the lower side of the pressure-bearing anti-slip cover plate, and a detachable dense-mesh pressure-bearing cover plate is adopted to form a multi-layer filtration system, and the filter screen can effectively intercept sediment and other debris, reduce the risk of ditch blockage, and reduce the risk of ditch blockage. Short sedimentation cycle, convenient for secondary utilization or direct discharge into the municipal pipe network; U-shaped connecting plates are used to connect the drainage ditch units, abandoning the traditional socket connection method, fixed with rivets, and sealed with sealant at the connection parts and rivet holes, which enhances the stability and sealing of the connection and reduces the risk of leakage; the entire drainage ditch system is quick to install, only needs to lay the sand cushion layer and then directly install the ditch body, backfill the sand and compact it, and finally harden the road surface and install the cover plate. After the temporary project is completed, the stainless steel drainage ditch can be recycled and reused, reducing the demolition cost and having significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic cross-sectional view of a drainage ditch unit according to an embodiment of the present invention

[0019] Figure 2 Schematic diagram of the connection method of the drainage ditch unit according to an embodiment of the present invention

[0020] Figure 3Schematic diagram of the construction method of the embodiment of the present invention

[0021] In the figure:

[0022] 101. Drainage ditch body 102. Pressure-bearing anti-slip cover plate 103. Rubber pad

[0023] 104, filter screen 105, U-shaped connecting plate 106, water retaining plate

[0024] 107. Rivets DETAILED DESCRIPTION

[0025] The present disclosure is described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are described. The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0026] like Figure 1-2 As shown, the present invention provides a recyclable drainage ditch around a foundation pit, which is spliced ​​by multiple sections of drainage ditch units. The drainage ditch unit includes a drainage ditch body 101, a pressure-bearing anti-skid cover plate 102, a rubber pad 103, a filter screen 104 and a U-shaped connecting plate 105. The pressure-bearing anti-skid cover plate 102 is arranged at the upper end of the drainage ditch body 101, the rubber pad 103 is arranged at the contact between the pressure-bearing anti-skid cover plate 102 and the drainage ditch body 101, the filter screen 104 is arranged inside the drainage ditch body 101, and the drainage ditch units are connected by the U-shaped connecting plate 105.

[0027] The pressure-bearing anti-skid cover plate 102 is arranged at the upper end of the drainage ditch body 101, mainly used to prevent external heavy objects from directly pressing on the drainage ditch unit and protect the internal structure. The rubber pad 103 is arranged at the contact point between the pressure-bearing anti-skid cover plate 102 and the drainage ditch body 101, which plays a role of sealing and shock absorption. The rubber pad can effectively prevent water from leaking from the gap between the cover plate and the ditch body, ensuring the sealing of the drainage system. The rubber pad also has a certain elasticity, which can play a buffering role when the pressure-bearing anti-skid cover plate 102 is impacted by external force, thereby extending the service life of the pressure-bearing anti-skid cover plate 102 and the drainage ditch body 101. The filter net 104 is arranged inside the drainage ditch body 101, located below the pressure-bearing anti-skid cover plate 102. The filter net 104 is used to filter the mud and other debris entering the drainage ditch to keep the ditch clean and unobstructed. By screening out debris at multiple layers, the risk of ditch blockage is reduced and the maintenance cycle is extended. The U-shaped connecting plate 105 is used to connect adjacent drainage ditch units to ensure the continuity and stability of the entire drainage system. The material of the drainage ditch body 101 includes but is not limited to stainless steel, fiberglass, polyethylene, polypropylene and concrete. The advantages of stainless steel are high strength, corrosion resistance, good pressure resistance, and can effectively prevent cracks and fractures caused by foundation pit settlement. Stainless steel also has good durability and recyclability, and meets environmental protection requirements. The material of the pressure-bearing anti-slip cover plate 102 includes but is not limited to stainless steel, aluminum alloy, cast iron and glass fiber reinforced plastic. The material of the rubber pad 103 includes but is not limited to natural rubber, EPDM rubber, chloroprene rubber and silicone rubber. The material of the filter screen 104 includes but is not limited to stainless steel, polyethylene, polypropylene, nylon and galvanized wire mesh. The material of the U-shaped connecting plate 105 includes but is not limited to stainless steel, aluminum alloy, cast iron and glass fiber reinforced plastic.

[0028] In one embodiment, the drainage ditch body 101 adopts an arc-shaped corner structure at the turning point.

[0029] The drainage ditch body 101 at the turning point of the drainage ditch is designed as an arc-shaped corner structure to avoid sediment accumulation, ensure smooth water flow, and reduce the risk of blockage.

[0030] In one embodiment, water retaining plates 106 are provided in the road surface on both sides of the drainage ditch body 101 .

[0031] Water retaining plates 106 are arranged in the road surface on both sides of the drainage ditch body 101. The water retaining plates 106 are embedded in the concrete when the road surface hardens, thereby enhancing the overall anti-seepage performance and effectively preventing surface water from flowing into the foundation pit. Preferably, the material of the water retaining plates 106 includes but is not limited to stainless steel, aluminum alloy, fiberglass and concrete.

[0032] In one embodiment, the drainage ditch body 101 and the U-shaped connecting plate 105 are connected by rivets 107 .

[0033] The drainage ditch units are connected by U-shaped connecting plates 105, abandoning the traditional socket connection method, and are fixed by rivets 107, and sealed with sealant at the connection parts and rivet holes, which enhances the stability and sealing of the connection and reduces the risk of leakage.

[0034] In one embodiment, the pressure-bearing anti-slip cover plate 102 is provided with dense mesh holes.

[0035] The pressure-bearing anti-skid cover plate 102 is provided with dense mesh holes to facilitate the inflow of rainwater and prevent large-size debris from falling into the ditch, thereby reducing the occurrence of blockage. A filter screen is added to the lower side of the pressure-bearing anti-skid cover plate, and a detachable dense mesh pressure-bearing cover plate is used to form a multi-layer filtration system. The filter screen can effectively intercept silt and other debris, reduce the risk of ditch blockage, shorten the sedimentation cycle, and facilitate secondary use or direct discharge into the municipal pipe network.

[0036] like Figure 3 As shown, in order to facilitate the use of a drainage ditch that can be recycled around a foundation pit provided by the present disclosure, the present disclosure also provides a construction method for the drainage ditch that can be recycled around a foundation pit, including:

[0037] After laying the sand cushion layer at the bottom of the ditch, the drainage ditch body 101 is placed at the predetermined position;

[0038] Ensure that all materials are complete, including the drainage ditch body 101, the anti-skid pressure cover plate 102, the rubber pad 103, the filter screen 104, the U-shaped connecting plate 105, the water retaining plate 106, the rivet 107 and the sealant, etc. Check the quality of the materials to ensure that the drainage ditch body is not deformed or damaged, the filter screen and the cover plate are intact, and the rubber pad has good elasticity. Clean the construction area to ensure that the ground is flat, free of debris and water accumulation. According to the design drawings, accurately measure and mark the installation position of the drainage ditch unit to ensure that the elevation and slope meet the requirements. Carry out foundation excavation along the predetermined position of the drainage ditch to ensure that the width and depth of the trench meet the specifications. During excavation, pay attention to keeping the soil on both sides of the trench stable to avoid excessive disturbance. Lay a 100-150mm thick sand cushion layer at the bottom of the trench, ensure that the sand cushion layer is evenly distributed, without large-grained stones or other debris, use a compactor to compact the sand cushion layer in layers, and the compaction degree should reach more than 90%, ensure that the cushion layer is flat and has sufficient bearing capacity, and strictly control the elevation of each point during the cushion layer laying process to ensure that the slope of the drainage ditch after installation meets the drainage requirements. You can use a level or a level to measure the elevation to ensure that the error is within the allowable range. Gently place the drainage ditch body 101 on the compacted sand cushion layer, ensure that the ditch body is stable and consistent with the designed position, use a level to check the levelness of the ditch body, and make fine adjustments if necessary to ensure that the elevation of the top of the drainage ditch body 101 meets the design requirements.

[0039] Adjacent drainage ditch bodies 101 are connected by rivets 107 using U-shaped connecting plates 105;

[0040] For two adjacent sections of the drainage ditch unit, a U-shaped connecting plate 105 is used for connection. The U-shaped connecting plate 105 is placed at the interface between the two sections of the drainage ditch body 101 to ensure that the U-shaped connecting plate 105 fits tightly with the drainage ditch body 101. Rivets 107 are used to fix the connecting plate to the drainage ditch body 101 through the rivet holes on the U-shaped connecting plate 105 to ensure a firm connection. At least 4 rivets are used at each connecting part to ensure the connection strength.

[0041] The connection part between the drainage ditch body 101 and the U-shaped connection plate 105 is sealed;

[0042] Use sealant to seal the connection between the U-shaped connecting plate 105 and the drainage ditch body 101 and the rivet holes to prevent water from seeping in from the interface. The sealant should be evenly applied to ensure the sealing effect. After all the ditch sections are installed, the entire drainage ditch system is adjusted as a whole to ensure that the elevation and slope of each section of the ditch are consistent and the drainage is smooth. You can use a level or level to check to ensure that it is correct.

[0043] Backfilling both sides of the drainage ditch body 101;

[0044] Backfill sand on both sides of the drainage ditch body 101 to ensure that the sand is evenly distributed without large stones or other debris. Backfilling should be done in layers, with each layer not exceeding 150mm in thickness. Use a compactor to compact each layer of sand to a compaction degree of more than 95% to ensure that the side walls are stable. After backfilling, check the elevation and slope of the drainage ditch to ensure that there are no changes. If the elevation or slope does not meet the requirements, it should be adjusted in time.

[0045] The road surface on both sides of the drainage ditch body 101 is hardened and a water retaining plate 106 is embedded;

[0046] Concrete pavement is laid on both sides of the drainage ditch body 101 to ensure that the pavement is flat and consistent with the top elevation of the drainage ditch body 101. When the pavement is hardened, special attention is paid to embedding the water retaining plates 106 on both sides of the drainage ditch into the concrete to ensure that the water retaining plates 106 are tightly combined with the concrete to enhance the anti-seepage performance. The water retaining plates 106 should be embedded in the concrete to a depth of no less than 50 mm to ensure that they are integrated with the concrete and effectively prevent surface water from flowing into the foundation pit.

[0047] A filter screen 104 , a rubber pad 103 and a pressure-bearing anti-slip cover plate 102 are sequentially installed on the drainage ditch body 101 .

[0048] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A recyclable drainage ditch around a foundation pit, characterized in that: The drain ditch unit is composed of multiple sections of gutter units, which include a gutter body, a pressure-bearing anti-skid cover plate, a rubber pad, a filter screen and a U-shaped connecting plate. The pressure-bearing anti-skid cover plate is arranged at the upper end of the gutter body, the rubber pad is arranged at the contact point between the pressure-bearing anti-skid cover plate and the gutter body, the filter screen is arranged inside the gutter body, and the gutter units are connected by the U-shaped connecting plate.

2. The recyclable drainage ditch around the foundation pit according to claim 1 is characterized by: The drainage ditch body adopts an arc-shaped corner structure at the turning point.

3. The recyclable drainage ditch around the foundation pit according to claim 2 is characterized by: Water retaining plates are arranged in the road surface on both sides of the drainage ditch body.

4. The recyclable drainage ditch around the foundation pit according to claim 3 is characterized by: The drainage ditch body is connected to the U-shaped connecting plate by rivets.

5. The recyclable drainage ditch around the foundation pit according to claim 1 is characterized by: The pressure-bearing anti-skid cover plate is provided with dense mesh holes.

6. A construction method for a recyclable drainage ditch around a foundation pit, using the recyclable drainage ditch around a foundation pit as claimed in claim 4, characterized in that: include: After laying the sand cushion layer at the bottom of the ditch, placing the drainage ditch body at the predetermined position; Using the U-shaped connecting plate to connect adjacent drainage ditch bodies with rivets; Performing sealing treatment on the connection portion between the drainage ditch body and the U-shaped connection plate; Backfilling both sides of the drainage ditch body; The road surface on both sides of the drainage ditch body is hardened and embedded with the water retaining plate; The filter screen, the rubber pad and the pressure-bearing anti-slip cover plate are sequentially installed on the drainage ditch body.

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