Lock chamber deep foundation pit construction system

Abstract

The utility model relates to a lock chamber deep foundation pit construction system which comprises a complete rock side slope, a weathered tuff side slope, an intercepting ditch, a movable protection platform, a to-be-excavated area foundation pit and a movable waterproof and drainage platform. Guide rails are arranged on the two sides above the foundation pit blasting area of each layer of to-be-excavated area, and the movable protection platform moves in parallel above the foundation pit blasting area of the to-be-excavated area through the guide rails; the movable type waterproof and drainage platform is arranged on the lower portion of the movable type protection platform and moves along the movable type protection platform beam. The structure has the advantages that the waterproof steel frame is used for pressing and fixing, the bottom drainage groove is used for pumping and draining in a centralized mode, the problem that the excavation face of the foundation pit is softened and disintegrated when encountering water is effectively solved, and it is guaranteed that the excavation face is stable and water is drained in time; the movable protection platform is adopted, effective safety protection can be provided in the blasting operation process, the safety of constructors is improved, and risks in the construction process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of lock construction, and in particular to a deep foundation pit construction system for lock chambers. Background Technology

[0002] With the rapid development of my country's economy, the water transport industry has also experienced continuous growth, leading to the inability of existing port basins and channel depths to meet current demands. Deep foundation pits are a crucial component of lock construction in water transport engineering, typically characterized by their considerable depth and scale, requiring advanced construction techniques. The excavation and support of deep foundation pits not only affect the stability of the locks but also directly impact the safety and efficiency of the entire water transport project. Among the challenges are the reliability and efficiency of deep foundation pit slope drainage, the softening and disintegration of weathered tuff slope excavation surfaces upon contact with water, protection during blasting excavation, and the safety of construction personnel.

[0003] In summary, for the construction of deep foundation pits in gate chambers, a construction system that is efficient in excavation, simple in operation, and reliable in construction quality is of great importance. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a construction system for deep foundation pits in gate chambers.

[0005] This deep foundation pit construction system for gate chambers includes intact rock slopes, weathered tuff slopes, intercepting ditches, mobile protective platforms, foundation pits in the area to be excavated, and mobile drainage platforms.

[0006] The weathered tuff slope surface is reinforced with steel mesh using an integral channel steel reinforcement support;

[0007] Guide rails are installed on both sides above the blasting area of ​​the foundation pit in each layer of the excavation area. The mobile protective platform moves parallel above the blasting area of ​​the foundation pit in the excavation area via the guide rails. The mobile drainage platform is located at the bottom of the mobile protective platform and moves along the crossbeam of the mobile protective platform.

[0008] Steel pipe piles are driven into the bottom of the deep foundation pit of the gate chamber. The steel pipe piles are equipped with built-in grouting pipes, which are used to grout the solidified body after the grouting is formed at the bottom of the deep foundation pit of the gate chamber.

[0009] Preferably, a water interception ditch is set at the top of the intact rock slope, and concrete is sprayed onto the surface of the intact rock slope with drainage pipes evenly spaced; a drainage ditch and a secondary platform are set at the bottom of the intact rock slope, and the drainage pipes converge into the drainage ditch through connecting pipes.

[0010] Preferably, the mobile protective platform includes a counterweight, a precast concrete slab, longitudinal beams, transverse beams, steel plates, pulleys, and guide rails. Guide rails are installed on the precast concrete slabs, and longitudinal beams and steel plates are sequentially installed on the upper part of the transverse beams, with a counterweight installed on the upper part of the steel plates. Pulleys are installed at both ends of the lower part of the transverse beams to move within the guide rails on both sides of the precast concrete slabs. Precast concrete slabs are laid on both sides above the blasting area of ​​the foundation pit in each layer of the excavation area, and the mobile protective platform moves parallel above the blasting area of ​​the foundation pit in the excavation area via the guide rails.

[0011] Preferably, anchor bolts and drainage pipes are installed at intervals on the weathered tuff slope; a steel mesh is laid on the surface of the weathered tuff slope, and an integral channel steel clamping support is pressed on the steel mesh. The integral channel steel clamping support includes longitudinal bars and transverse bars, and a reserved hole is set at the intersection of the longitudinal bars and transverse bars; the anchor bolts are inserted into the reserved holes of the integral channel steel clamping support and bolted to form an integral whole; concrete is sprayed onto the steel mesh and the integral channel steel clamping support.

[0012] Preferably, the mobile drainage platform includes a steel plate, an adjustable movable boom, a column, a pressure beam, and small columns. The pressure beam is welded to the column, and the column is fixed to the adjustable movable boom by pins. The top of the adjustable movable boom is equipped with a U-shaped steel plate with built-in pulleys that move along the crossbeam at the bottom of the mobile protective platform. A steel plate is installed at the bottom of the pressure beam, and water collection holes are provided on the steel plate. Steel plates are installed around the mobile drainage platform and fixed to the pressure beam by small columns to form a water collection trough.

[0013] Preferably, the steel pipe piles are driven at the bottom of the deep foundation pit of the gate chamber, and a cushion layer is set on them; the steel pipe piles are equipped with built-in grouting pipes, wherein the built-in grouting pipes are inverted T-shaped, and the T-shaped end is connected to the protruding section extending out of the steel pipe pile through a threaded section, and the built-in grouting pipes are welded to the steel pipe piles to form a whole.

[0014] The beneficial effects of the utility model are:

[0015] 1) By setting up drainage holes, this utility model adopts a waterproof steel frame for compaction and a bottom drainage trough for centralized drainage, which can efficiently concentrate and guide the water in the foundation pit to drain out, improve the reliability and efficiency of drainage, effectively prevent the foundation pit excavation surface from softening and disintegrating when it encounters water, and ensure the stability of the excavation surface and the timely drainage of water.

[0016] 2) This utility model adopts a mobile protective platform, which can provide effective safety protection during blasting operations, improve the safety of construction personnel, and reduce the risks during construction.

[0017] 3) This utility model adopts an integral channel steel compression connection structure with steel mesh, which can effectively support and reinforce rock slopes and improve slope stability. In addition, the integral connection method also helps to improve construction efficiency and quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-section of the deep foundation pit of the gate chamber;

[0019] Figure 2 This is a construction diagram of a mobile protective platform;

[0020] Figure 3 This is a schematic diagram of a mobile protective platform;

[0021] Figure 4 This is a construction diagram of a mobile drainage platform;

[0022] Figure 5 This is a schematic diagram of a mobile waterproofing and drainage platform.

[0023] Figure 6 This is a schematic diagram of an adjustable movable boom;

[0024] Figure 7 This is a schematic diagram of the water collection tank;

[0025] Figure 8 This is a schematic diagram of the protective section of a weathered tuff slope;

[0026] Figure 9 This is a schematic diagram of an integral channel steel pressure support.

[0027] In the diagram: 1-Intact rock slope, 2-Weathered tuff slope, 3-Intercepting ditch, 4-Concrete, 5-Drainage pipe, 6-Drainage ditch, 7-Secondary platform, 8-Anchor bolt, 9-Subbase, 10-Steel pipe pile, 11-Post-grouting reinforcement, 12-Mobile protective platform, 13-Counterweight block, 14-Precast concrete slab, 15-Foundation pit to be excavated, 16-Longitudinal beam, 17-Horizontal beam, 18-Steel plate, 19-Pulley, 20-Guide rail, 21-Mobile drainage platform, 22-Adjustable mobile boom, 23-Water collection trough, 24-Hanging column, 25-Pressure beam, 26-Small column, 27-Water collection hole, 28-Integral channel steel pressure support, 29-Built-in grouting pipe, 30-Reinforcing mesh, 31-Longitudinal bar, 32-Horizontal bar, 33-Reserved hole. Detailed Implementation

[0028] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0029] As one example, such as Figures 1 to 9 As shown, this deep foundation pit construction system for the gate chamber includes: 1. intact rock slope; 2. weathered tuff slope; 3. intercepting ditch; 4. concrete; 5. drainage pipe; 6. drainage ditch; 7. secondary platform; 8. anchor bolts; 9. cushion layer; 10. steel pipe piles; 11. post-grouting reinforcement; 12. mobile protective platform; 13. counterweight; 14. precast concrete slab; 15. foundation pit to be excavated; 16. longitudinal beams; 17. transverse beams; 18. steel plates; 19. pulleys; 20. guide rails; 21. mobile drainage platform; and 22. adjustable movable suspension rods. 23. Water collection trough, 24. Hanging column, 25. Pressure beam, 26. Small column, 27. Water collection hole, 28. Integral channel steel pressure support, 29. Built-in grouting pipe, 30. Steel mesh, 31. Longitudinal bar, 32. Horizontal bar, 33. Reserved hole; The deep foundation pit blasting combined protection technology adopts a mobile protection platform, the deep foundation pit blasting rock slope combined support technology adopts a steel mesh integral channel steel pressure connection structure, and the water-softening and disintegrating foundation pit excavation face waterproofing and drainage technology adopts waterproof steel frame pressure and bottom drainage trough centralized pumping, etc.

[0030] like Figure 8 As shown, the surface of the weathered tuff slope 2 is reinforced with steel mesh 30 by an integral channel steel reinforcement support 28;

[0031] like Figure 2 and Figure 3 As shown, guide rails 20 are installed on both sides above the blasting area of ​​the foundation pit 15 to be excavated in each layer. The mobile protective platform 12 moves parallel above the blasting area of ​​the foundation pit 15 to be excavated through the guide rails 20. The mobile drainage platform 21 is located at the lower part of the mobile protective platform 12 and moves along the crossbeam 17 of the mobile protective platform 12.

[0032] like Figure 1 and Figure 8 As shown, steel pipe piles 10 are driven into the bottom of the deep foundation pit of the gate chamber. The steel pipe piles 10 are equipped with built-in grouting pipes 29, which are used to inject grouting solidification 11 after grouting is formed at the bottom of the deep foundation pit of the gate chamber.

[0033] A water interception ditch 3 is set at the top of the complete rock slope 1, and sprayed concrete 4 is used for slope protection and drainage pipes 5 are evenly spaced. A drainage ditch 6 and a secondary platform 7 are set at the bottom of the complete rock slope 1. The drainage pipes 5 are connected to the drainage ditch 6 for centralized drainage.

[0034] like Figure 2 and Figure 3 As shown, the mobile protective platform 12 consists of a counterweight 13, a precast concrete slab 14, longitudinal beams 16, transverse beams 17, steel plates 18, pulleys 19, and guide rails 20. The precast concrete slab 14 is prefabricated in a factory and is equipped with guide rails 20. The precast concrete slab 14 is a uniformly sized precast slab, and multiple slabs can be spliced ​​together according to design requirements and transported and assembled by a crane. The transverse beams 17 are sequentially equipped with longitudinal beams 16 and steel plates 18, and the counterweight 13 is installed on the upper part of the steel plates 18. The transverse beams 17 are equipped with pulleys 19 at the lower part, which can move within the guide rails 20. The deep foundation pit of the gate chamber is excavated by layered blasting. Precast concrete slabs 14 are laid above the blasting area of ​​the foundation pit 15 to be excavated in each layer. The mobile protective platform 12 can move parallel above the blasting area of ​​the foundation pit 15 to be excavated via the guide rails 20.

[0035] like Figure 8 and Figure 9 As shown, the weathered tuff slope 2 is protected by shotcrete and anchor support, with anchor rods 8 and drainage pipes 5 evenly spaced. The integral channel steel clamping support 28 consists of longitudinal rods 31 and transverse rods 32, with reserved holes 33 at the intersection of the longitudinal rods 31 and transverse rods 32. The steel mesh 30 is laid on the weathered tuff slope 2 and then clamped by the integral channel steel clamping support 28. The anchor rods 8 are inserted into the reserved holes 33 of the integral channel steel clamping support 28 and bolted to form a whole, and then shotcrete 4 is sprayed.

[0036] like Figures 4 to 7 As shown, the mobile drainage platform 21 consists of a steel plate 18, an adjustable movable boom 22, a boom 24, a pressure beam 25, and small columns 26, and is installed at the lower part of the mobile protective platform 12. The pressure beam 25 is welded to the boom 24, and the boom and the adjustable movable boom 22 are fixed by pins. The top of the adjustable movable boom 22 is equipped with a U-shaped steel plate with built-in pulleys that can move along the crossbeam 17. The lower part of the pressure beam 25 is equipped with a steel plate 18, and water collection holes 27 are provided on the steel plate 18. Steel plates 18 are also provided around the perimeter and fixed to the pressure beam 25 by small columns 26 to form a water collection trough 23. When the mobile drainage platform 21 is moved to a water-filled position, the adjustable movable boom 22 is adjusted so that the water collection trough 23 is supported on the base. The water in the base is collected through the water collection holes 27 and then pumped out into the water collection trough 23, which solves the problem of the weathered tuff slope 2 softening and disintegrating when exposed to water at the excavation surface of the foundation pit.

[0037] like Figure 8As shown, the steel pipe pile 10 is driven into the bottom of the deep foundation pit of the gate chamber, and a cushion layer 9 is set on it. The steel pipe pile 10 is equipped with an internal grouting pipe 29, which is inverted T-shaped with a threaded section at the end of the T-shape. It is later extended to extend out of the steel pipe pile 10. The internal grouting pipe 29 is welded to the steel pipe pile 10 into a whole by welding a steel plate at the lower part of the extended section. The welded steel plate can also reduce the sinking resistance of the steel pipe pile 10 due to the external leakage of the internal grouting pipe 29. After grouting, the internal grouting pipe 29 forms a grouting solidified body 11, which improves the bearing capacity and seepage prevention of the bottom of the deep foundation pit of the gate chamber.

Claims

1. A construction system for deep foundation pits of gate chambers, characterized in that, This includes intact rock slopes, weathered tuff slopes, intercepting ditches, mobile protective platforms, foundation pits in the area to be excavated, and mobile drainage platforms; The weathered tuff slope surface is reinforced with steel mesh using an integral channel steel reinforcement support; Guide rails are installed on both sides above the blasting area of ​​the foundation pit in each layer of the excavation area. The mobile protective platform moves parallel above the blasting area of ​​the foundation pit in the excavation area via the guide rails. The mobile drainage platform is located at the bottom of the mobile protective platform and moves along the crossbeam of the mobile protective platform. Steel pipe piles are driven into the bottom of the deep foundation pit of the gate chamber. The steel pipe piles are equipped with built-in grouting pipes, which are used to grout the solidified body after the grouting is formed at the bottom of the deep foundation pit of the gate chamber.

2. The deep foundation pit construction system for the gate chamber according to claim 1, characterized in that, A water interception ditch is set at the top of the complete rock slope, and concrete is sprayed onto the surface of the complete rock slope with drainage pipes evenly spaced. A drainage ditch and a secondary platform are set at the bottom of the complete rock slope, and the drainage pipes converge into the drainage ditch through connecting pipes.

3. The deep foundation pit construction system for the gate chamber according to claim 1, characterized in that, The mobile protective platform includes a counterweight, precast concrete slabs, longitudinal beams, transverse beams, steel plates, pulleys, and guide rails. Guide rails are installed on the precast concrete slabs, and longitudinal beams and steel plates are sequentially installed on the upper part of the transverse beams. A counterweight is installed on the upper part of the steel plates. Pulleys are installed at both ends of the lower part of the transverse beams to move within the guide rails on both sides of the precast concrete slabs. Precast concrete slabs are laid on both sides above the blasting area of ​​the foundation pit to be excavated in each layer. The mobile protective platform moves parallel above the blasting area of ​​the foundation pit to be excavated via the guide rails.

4. The deep foundation pit construction system for the gate chamber according to claim 1, characterized in that, Anchor bolts and drainage pipes are installed at intervals on the weathered tuff slope; a steel mesh is laid on the surface of the weathered tuff slope, and an integral channel steel support is pressed on the steel mesh. The integral channel steel support includes longitudinal bars and transverse bars, and reserved holes are set at the intersection of the longitudinal bars and transverse bars; the anchor bolts are inserted into the reserved holes of the integral channel steel support and bolted to form a whole; concrete is sprayed on the steel mesh and the integral channel steel support.

5. The deep foundation pit construction system for the gate chamber according to claim 1, characterized in that, The mobile drainage platform includes a steel plate, an adjustable movable boom, a column, a pressure beam, and small columns. The pressure beam is welded to the column, and the column is fixed to the adjustable movable boom by pins. The top of the adjustable movable boom is equipped with a U-shaped steel plate with built-in pulleys that move along the crossbeam at the bottom of the mobile protective platform. A steel plate is installed at the bottom of the pressure beam, and water collection holes are provided on the steel plate. Steel plates are installed around the mobile drainage platform and fixed to the pressure beam by small columns to form a water collection trough.

6. The deep foundation pit construction system for the gate chamber according to claim 1, characterized in that, The steel pipe piles are driven into the bottom of the deep foundation pit of the gate chamber, and a cushion layer is set on them; the steel pipe piles are equipped with built-in grouting pipes, wherein the built-in grouting pipes are inverted T-shaped, and the T-shaped end is connected to the protruding section extending out of the steel pipe pile through a threaded section, and the built-in grouting pipes are welded to the steel pipe piles to form a whole.

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