Multi-machine joint water stop curtain and construction method

Abstract

The present application relates to a kind of multi-machine joint water stop curtain and construction method, including underground obstacle combination detection technology, multi-machine joint applicable optimization combination technology, TRD construction slot wall reinforcement technology, high-pressure rotary jet pile movable steel frame construction platform, three-axis construction slot mouth closed construction environment control device, five-axis construction steel-steel plate combination guide slot frame.The beneficial effects of the present application are: it can solve the construction problem of multi-machine joint water stop curtain, and has good technical benefits;Multi-machine joint applicable optimization combination technology is used, different mechanical equipment combination is selected according to actual working condition to construct water stop curtain, and the problem of poor water stop effect when single equipment is used to construct water stop curtain under special working condition is solved;TRD construction slot wall reinforcement technology solves the problem of slot wall collapse when TRD constructs water stop curtain under loose geology.

Description

Technical Field

[0001] This invention relates to the field of water-stop curtain construction in deep foundation pit construction, and particularly to a multi-machine combined water-stop curtain and construction method. Background Technology

[0002] In deep foundation pit construction, the construction of a water-stop curtain is one of the important measures to ensure the quality of the foundation pit project. The function of a water-stop curtain is to construct a seamless water-stop curtain in areas with high groundwater levels through drilling and grouting techniques, preventing groundwater from flowing into the foundation pit. However, the construction of water-stop curtains presents some problems and difficulties.

[0003] First, the underground environment during deep foundation pit construction is complex, with factors such as high groundwater levels, loose soil layers, and variable rock strata. These factors can all affect the construction of the cutoff wall. For example, a high groundwater level can increase construction difficulty, slow down the construction progress, and may even affect the effectiveness of the cutoff wall.

[0004] Secondly, the construction of a water-stop curtain needs to consider factors such as underground pipelines and facilities, which are all important factors affecting the construction. Improper construction may affect the surrounding environment and cause serious safety accidents.

[0005] Therefore, there is an urgent need to invent a water-stop curtain and its construction method to solve the problem of loose underground soil layers creating channels during deep foundation pit construction. At the same time, it is necessary to solve the construction difficulties of water-stop curtains with different equipment under different working conditions, ensure the smooth progress of water-stop curtain construction, and ultimately guarantee the quality and safety of the foundation pit project. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-machine combined water-stop curtain and construction method.

[0007] This multi-machine combined water-stop curtain includes underground obstacle detection technology, TRD construction trench wall reinforcement technology, a high-pressure jet grouting pile mobile steel frame construction platform, a three-axis construction trench opening closed construction environment control device, and a five-axis construction steel-plate composite guide trench frame; it also includes high-pressure jet grouting pile equipment, a three-axis mixing pile drilling rig, and a five-axis mixing pile;

[0008] The underground obstacle detection technology includes a transient surface wave detector, a detection radar, an excavation hole, and geotextile bags for sealing underground passages. The geotextile bags are arranged along the sidewall of the excavation hole, filled with concrete and sealed with mud. A water-stop curtain is installed inside the geotextile bags.

[0009] TRD construction trench wall reinforcement technology includes steel profiles-steel plates or precast plates. Steel profiles-steel plates include L-shaped steel plates, and precast plates include trench wall cover plates, steel rod insertion holes, steel rods, and trench wall side plates.

[0010] The high-pressure jet grouting pile construction platform is a mobile steel frame platform, which includes a steel plate platform, a Bailey structure frame, a platform base plate, and mobile rollers.

[0011] The three-axis construction trench closed construction environment control device includes a protective cover, a hollow fixing ring and a protective cover clamp ring, with the lower part of the protective cover clamp ring welded to the protective cover body.

[0012] The five-axis construction steel-plate composite guide trough frame includes a guide frame body and a guide trough body. The guide frame body includes a guide frame crossbar, a guide frame vertical bar, and a guide rod. The guide trough body includes a roller fixing shaft, a guide trough roller, a roller fixing ring, and a guide trough.

[0013] As a preferred option: the L-shaped steel plate is composed of two steel plates welded vertically to the long side. When the TRD construction trench wall reinforcement technology is steel-plate, an excavation trench is provided on the soil, and the L-shaped steel plate is fitted into the trench wall. The precast plate includes a trench wall cover plate, a steel rod insertion hole, a steel rod, and a trench wall side plate. The trench wall cover plate and the trench wall side plate are provided with steel rod insertion holes. One end of the trench wall cover plate is provided with a cover plate slot, and one end of the trench wall side plate is provided with a side plate protrusion. When the side plate protrusion is fitted into the cover plate slot, the trench wall cover plate and the trench wall side plate form an L-shaped structure, and the steel rod passes through the steel rod insertion hole.

[0014] Preferably, the Bailey structure frame is arranged on the platform base plate and fixed by welding plates, the Bailey structure frame is arranged on the steel plate platform and fixed by welding plates, roller fixers are evenly distributed on the four sides of the platform base plate, and movable rollers are fixed at the bottom of the roller fixers, and the high-pressure jet grouting equipment is placed on the steel plate platform.

[0015] Preferably, hollow fixing rings are provided on both sides of the protective cover clamp ring, and a protective cover body is welded to the lower part of the protective cover clamp ring; fixing blocks are provided at both ends of the drill rod support of the three-axis mixing pile drilling machine, and the protective cover body is hooked onto the drill rod support through the fixing blocks and hollow fixing rings.

[0016] Preferably, the guide frame includes a guide frame crossbar, a guide frame vertical bar, and a guide rod. The guide frame is a rectangular frame, and the guide groove in the guide groove is a rectangular thin-walled cavity structure. A fixing ring connecting block is welded to each of the four corners of the top of the guide groove. A roller fixing ring is welded to the upper part of the fixing ring connecting block. The roller fixing ring passes through the guide rod and fixes the guide groove roller to the guide rod through the roller fixing shaft. A guide groove limiter is provided on the side of the roller fixing ring. The guide groove moves along the guide rod through the guide groove roller and is fixed by the guide groove limiter. The drill rod of the five-axis mixing pile drills through the cavity of the guide groove, and the five-axis mixing pile moves with the guide groove.

[0017] The construction method for this multi-machine combined water-stop curtain includes the following steps:

[0018] Step 1: Detect underground obstacles. If an underground passage is found, the excavation hole will be enlarged and geotextile bags will be used to seal the sidewalls of the excavation hole. After pouring concrete, a water-stop curtain will be constructed.

[0019] Step 2: Multiple machines work together to construct the water-stop curtain, and the water-stop curtain is constructed according to the condition of the foundation pit;

[0020] For small foundation pits, diaphragm walls are used for the retaining wall on the side adjacent to the building, and high-pressure jet grouting piles are used to construct the water-stop curtain on both sides of the diaphragm wall; diaphragm walls are used on the side not adjacent to the building, and five-axis mixing piles are used to construct the water-stop curtain on both sides of the diaphragm wall.

[0021] For large foundation pits, a five-axis cement mixing pile is used to construct a water-stop curtain on the side of the retaining wall adjacent to the building, and a diaphragm wall is used on the side adjacent to the road. The outer side of the diaphragm wall is constructed with a TRD water-stop curtain, and the inner side is constructed with a five-axis cement mixing pile.

[0022] As a preferred option, in step one: for shallow areas with a burial depth of less than 3 meters, local excavation or drilling is carried out, and a transient surface wave detector is used to verify whether there is an underground passage; for deep areas with a burial depth of more than 3 meters, a detection radar is used in conjunction with the excavation hole to detect obstacles or underground passages within the pile foundation construction area; if an underground passage is found, the excavation hole is expanded beyond the water-stop curtain construction area, and geotextile bags are used to seal the sidewalls of the excavation hole, then concrete is poured into the geotextile bags, and finally the top is sealed with mud. After the structure hardens and reaches its strength, a water-stop curtain is constructed inside the geotextile bags.

[0023] As a preferred option, in step two: when using TRD to construct the water-stop curtain, the TRD trench wall is reinforced with steel profiles and steel plates or precast slabs. When using steel profiles and steel plates to reinforce the TRD trench wall, the trench required for TRD construction is first excavated in the soil, and the L-shaped steel plate is embedded in the trench wall to complete the reinforcement. When using precast slabs to reinforce the TRD trench wall, the side plate protrusions are fitted into the cover plate slots to form an L-shaped structure between the trench wall cover plate and the trench wall side plate. At the same time, the precast slab structure is embedded in the TRD trench wall by passing a steel rod through the steel rod insertion hole to complete the reinforcement.

[0024] When using high-pressure jet grouting piles to construct a water-stop curtain, the high-pressure jet grouting piles are assembled and welded into a mobile steel frame construction platform and placed on the construction site. The high-pressure jet grouting pile equipment is placed on the steel plate platform, and the construction platform is moved by moving rollers, which in turn moves the high-pressure jet grouting pile equipment.

[0025] When constructing a water-stop curtain using five-axis mixing piles, the five-axis construction steel-plate combined guide trough frame is assembled and placed at the initial construction point. The guide trough rollers drive the guide trough to move along the guide rod, and the guide trough limiters are used for limiting and fixing. The five-axis mixing pile drill rod passes through the cavity of the guide trough and drills into the soil. After a row of piles is completed, the guide trough moves linearly along the crossbar of the guide frame to control the construction alignment of the five-axis mixing piles.

[0026] As a preferred method, when using triaxial mixing piles to construct the water-stop curtain, the protective cover is attached to the drill rod support by fixing blocks and hollow fixing rings. The drill rod of the triaxial mixing pile drills through the soil to be constructed, and the mud brought up is blocked by the protective cover.

[0027] The beneficial effects of this invention are:

[0028] 1) The structure involved in this invention can solve the problem of multi-machine joint water-stop curtain construction and has good technical benefits.

[0029] 2) The use of underground obstacle detection technology has solved the problem of poor water-stop curtain construction effect when underground passages appear in deep foundation pits.

[0030] 3) Adopt multi-machine combined and optimized combination technology, select different mechanical equipment combinations to apply water-stop curtain according to actual working conditions, and solve the problem of poor water-stopping effect when a single equipment is used to apply water-stop curtain under special working conditions.

[0031] 4) The adoption of TRD construction trench wall reinforcement technology has solved the problem of easy collapse of trench walls when TRD is used to construct water-stop curtains in loose geological conditions.

[0032] 5) The use of a mobile steel frame construction platform for high-pressure jet grouting piles solves the problem of inconvenient equipment movement and low efficiency during high-pressure jet grouting pile construction.

[0033] 6) The adoption of a three-axis construction trench closed construction environment control device has solved the problems of mud slurry splashing and loose soil dust pollution of the environment and construction site during the construction of three-axis mixing piles.

[0034] 7) The use of a five-axis construction steel-plate combined guide trough frame solves the problem of difficulty in controlling the alignment of the mixing piles when constructing the water-stop curtain with five-axis mixing piles. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the multi-machine combined water-stop curtain structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the construction process for combined underground obstacle detection within a 3m underground area;

[0037] Figure 3 This is a schematic diagram of a construction project for combined underground obstacle detection covering an area exceeding 3 meters underground.

[0038] Figure 4 This is a schematic diagram of the rapid sealing construction of the underground passage;

[0039] Figure 5 This is a schematic diagram of the construction of a water-stop curtain after the rapid sealing of an underground passage;

[0040] Figure 6 This is a schematic diagram of the cross-section of the excavation for the TRD construction trench wall;

[0041] Figure 7 This is a schematic diagram of the construction structure for the excavation of the TRD trench wall;

[0042] Figure 8 This is a schematic diagram of the cross-section of the steel-plate reinforcement in the TRD construction trench wall;

[0043] Figure 9 This is a schematic diagram of the steel-plate reinforcement structure for the TRD construction trench wall;

[0044] Figure 10 This is a schematic diagram of a steel section-steel plate structure;

[0045] Figure 11 This is a schematic diagram of the cross-section of the precast slab reinforced TRD trench wall;

[0046] Figure 12 This is a schematic diagram of a precast panel assembly structure;

[0047] Figure 13 This is a schematic diagram of the disassembled structure of the precast slab;

[0048] Figure 14 This is a schematic diagram of a mobile steel frame construction platform for high-pressure jet grouting piles;

[0049] Figure 15 yes Figure 14 Enlarged view of region A in the middle;

[0050] Figure 16 This is a schematic diagram of a Bailey bridge structure;

[0051] Figure 17 This is a schematic diagram of the cross-section of a mobile steel frame construction platform for high-pressure jet grouting piles;

[0052] Figure 18 This is a schematic diagram of the construction of a closed construction environment control device for a three-axis construction trench.

[0053] Figure 19 This is a schematic diagram of a three-axis construction trench closed construction environment control device.

[0054] Figure 20 This is a schematic diagram of the drill rod and drill rod support structure for a three-axis mixing pile.

[0055] Figure 21 This is a schematic diagram of the protective cover structure;

[0056] Figure 22 This is a schematic diagram of a five-axis construction steel-plate composite guide trough structure;

[0057] Figure 23 yes Figure 22 Enlarged view of region B in the middle;

[0058] Figure 24 This is a front view of a five-axis construction steel-plate composite guide trough frame;

[0059] Figure 25 This is a side view of a five-axis construction steel-plate composite guide trough frame;

[0060] Figure 26 This is a schematic diagram of the guide channel structure in a five-axis construction steel-plate composite guide channel frame.

[0061] The components include: 1. Transient surface wave detector; 2. 3-meter burial depth line; 3. Detection radar; 4. Excavation hole; 5. Underground passage; 6. Geotextile bag; 7. Concrete; 8. Mud seal; 9. L-shaped steel plate; 10. Soil; 11. Excavation trench; 12. Steel plate platform; 13. Bailey bridge structure; 14. Welded plate; 15. Platform base plate; 16. Roller fixing device; 17. Moving roller; 18. Drill rod; 19. Drill rod support; 20. Protective cover; 21. Fixing block; 22. Hollow core. 22. Fixing ring, 23. Protective cover clamp ring, 24. Soil to be constructed, 25. Guide frame horizontal bar, 26. Guide frame vertical bar, 27. Roller fixing shaft, 28. Guide groove roller, 29. Guide groove limiter, 30. Guide rod, 31. Roller fixing ring, 32. Fixing ring connecting block, 33. Guide groove, 34. Groove wall cover plate, 35. Steel rod insertion hole, 36. Steel rod, 37. Cover plate slot, 38. Groove wall side plate, 39. Side plate protrusion, 40. Water-stop curtain. Detailed Implementation

[0062] 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 those skilled in the art can make several modifications 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.

[0063] Example 1

[0064] As one example, such as Figures 1 to 26 As shown, a multi-machine combined water-stop curtain includes underground obstacle detection technology, TRD construction trench wall reinforcement technology, a high-pressure jet grouting pile mobile steel frame construction platform, a three-axis construction trench opening closed construction environment control device, and a five-axis construction steel-plate combined guide trench frame; it also includes high-pressure jet grouting pile equipment, a three-axis mixing pile drilling rig, and a five-axis mixing pile;

[0065] The underground obstacle combined detection technology mainly includes a transient surface wave detector 1, a detection radar 3, an excavation hole 4, a geotextile bag 6, concrete 7, and mud seal 8. The geotextile bag 6 is arranged along the side wall of the excavation hole 4 to block the underground passage 5. Concrete 7 is poured into the geotextile bag 6 and sealed with mud seal 8 to block the underground passage 5 in the foundation pit.

[0066] The multi-machine combined application optimization technology mainly selects different combinations of mechanical equipment to construct the water-stop curtain according to different foundation pit conditions. For small foundation pits, the retaining wall on the side adjacent to the building is a diaphragm wall, and the water-stop curtain is formed by high-pressure jet grouting pile trench walls on both sides; the water-stop curtain on the side not adjacent to the building is a diaphragm wall, and the water-stop curtain is formed by five-axis cement mixing pile trench walls on both sides, with the diaphragm wall closed in plan. For large foundation pits, the retaining wall on the side adjacent to the building is a five-axis cement mixing pile as the water-stop curtain, and the side adjacent to the road is a diaphragm wall. The outer side of the diaphragm wall is reinforced with TRD as the trench wall, and the inner side is reinforced with five-axis cement mixing pile as the trench wall. Large foundation pits are constructed in sections and blocks, with two steel composite supports + concrete side trusses as horizontal supports.

[0067] The TRD construction trench wall reinforcement technology is mainly divided into two methods: steel profile-steel plate and precast plate. The steel profile-steel plate is mainly composed of L-shaped steel plate 9, and the precast plate is mainly composed of trench wall cover plate 34, steel rod insertion hole 35, steel rod 36, and trench wall side plate 38.

[0068] The high-pressure jet grouting pile mobile steel frame construction platform mainly consists of a steel plate platform 12, a Bailey structure frame 13, a platform base plate 15, and mobile rollers 17.

[0069] The three-axis construction trench closed construction environment control device mainly consists of a protective cover 20, a hollow fixing ring 22, and a protective cover clamp ring 23. The lower part of the protective cover clamp ring 23 is welded to the protective cover 20.

[0070] The five-axis construction steel-plate combined guide trough frame is mainly composed of two parts: the guide frame body and the guide trough body. The guide frame body consists of the guide frame horizontal bar 25, the guide frame vertical bar 26, and the guide rod 30. The guide trough body consists of the roller fixing shaft 27, the guide trough roller 28, the roller fixing ring 31, and the guide trough 33.

[0071] There are two methods for reinforcing the TRD trench walls: steel profile-plate and precast slab. The steel profile-plate method mainly consists of L-shaped steel plates 9, which are formed by two steel plates welded perpendicularly to their long sides. When using steel profile-plate to reinforce the TRD trench walls, the trench 11 required for TRD construction is first excavated in the soil 10. The L-shaped steel plates 9 are then fitted into the trench walls of the excavation 11 to complete the reinforcement. The precast slab mainly consists of a trench wall cover plate 34, steel rod insertion holes 35, and steel rods. 36. The trench wall side plate 38 is formed. The trench wall cover plate 34 and the trench wall side plate 38 are provided with steel rod insertion holes 35. One end of the trench wall cover plate 34 is provided with a cover plate slot 37, and one end of the trench wall side plate 38 is provided with a side plate protrusion 39. During construction, the side plate protrusion 39 is fitted with the cover plate slot 37 to form an L-shaped structure between the trench wall cover plate 34 and the trench wall side plate 38. At the same time, the precast slab structure is fitted into the TRD trench wall by passing the steel rod insertion hole 35 through the steel rod 36 to complete the reinforcement.

[0072] The high-pressure jet grouting pile is a mobile steel frame construction platform, which consists of a steel plate platform 12, a Bailey structure frame 13, a platform base plate 15, and moving rollers 17. The Bailey structure frame 13 is evenly distributed on the platform base plate 15 and is fixed by welding plates 14. The steel plate platform 12 and the Bailey structure frame 13 are also fixed by welding in the same way. Three sets of nine roller fixers 16 are evenly distributed on the four sides of the platform base plate 15. Moving rollers 17 are fixed at the bottom of the roller fixers 16. During construction, the high-pressure jet grouting pile equipment is placed on the steel plate platform 12, and the moving rollers 17 move the construction platform and drive the high-pressure jet grouting pile equipment.

[0073] The three-axis construction trench closed construction environment control device has hollow fixing rings 22 on both sides of the protective cover clamp ring 23. The lower part of the protective cover clamp ring 23 is welded with a protective cover body 20. Fixing blocks 21 are set at both ends of the drill rod support 19 of the three-axis mixing pile drilling machine. The protective cover is hooked onto the drill rod support 19 through the fixing blocks 21 and the hollow fixing rings 22. During construction, the three-axis mixing pile drill rod 18 drills through the soil to be constructed 24 and brings up mud which is blocked inside the protective cover body 20.

[0074] The five-axis construction steel-plate combined guide trough frame consists of a rectangular frame composed of a guide frame crossbar 25, a guide frame vertical bar 26, and a guide rod 30. The guide trough 33 is a rectangular thin-walled cavity structure. A fixing ring connecting block 32 is welded to each of the four corners of the top of the guide trough 33. A roller fixing ring 31 is welded to the upper part of the fixing ring connecting block. The roller fixing ring passes through the guide rod 30 and fixes the guide trough roller 28 to the guide rod 30 through the roller fixing shaft 27. A guide trough limiter 29 is set next to the roller fixing ring 31. During construction, the guide trough roller 28 drives the guide trough 33 to move along the guide rod 30. When it reaches the required construction position, the guide trough limiter 29 is used to limit and fix it. The five-axis mixing pile drill rod drills through the cavity of the guide trough 33. The construction line of the five-axis mixing pile is controlled by the movement of the guide trough 33.

[0075] Example 2

[0076] As another embodiment, the multi-machine combined water-stop curtain construction method proposed in Embodiment 1 includes the following steps:

[0077] Step 1: Detection of underground obstacles. For shallow areas with a burial depth of less than 3 meters, a transient surface wave detector 1 and local excavation or drilling are used to verify whether there is an underground passage 5. For deep areas with a burial depth of more than 3 meters, a detection radar 3 is used in conjunction with an excavation hole 4 to detect obstacles or underground passages 5 in detail within the pile foundation construction area. If an underground passage 5 is found, the excavation hole 4 is expanded beyond the water-stop curtain construction area, and geotextile bags 6 are used to seal the sidewalls of the excavation hole 4. Then, concrete 7 is poured into the geotextile bags 6, and finally, mud is used to seal the top 8. After the structure hardens and reaches its strength, a water-stop curtain 40 is constructed inside the structure.

[0078] Step 2: Multi-machine joint construction of the water-stop curtain. When the geological conditions in the foundation pit construction area meet the construction requirements, construct a 40mm water-stop curtain according to the actual working conditions.

[0079] For small foundation pits, the retaining wall on the side adjacent to the building is a diaphragm wall, and the two sides are reinforced with high-pressure jet grouting pile trench walls to form a water-stop curtain; the side not adjacent to the building is a diaphragm wall, and the two sides are reinforced with five-axis mixing pile trench walls to form a water-stop curtain, and the diaphragm wall is closed in the plane.

[0080] For large foundation pits, five-axis cement mixing piles are used as a water-stop curtain on the side adjacent to the building, and diaphragm walls are used on the side adjacent to the road. The outer side of the diaphragm wall is reinforced with TRD (Temperature Reinforced Deposition) for trench wall reinforcement, and the inner side is reinforced with five-axis cement mixing piles for trench wall reinforcement. The large foundation pit is constructed in sections and blocks, with two steel composite supports + concrete side trusses as horizontal supports.

[0081] When using TRD (Tunnel Die Removal) to construct a water-stop curtain, the TRD trench walls are reinforced with steel profiles and steel plates or precast slabs. When using steel profiles and steel plates to reinforce the TRD trench walls, the trench required for TRD construction, i.e., the excavation trench 11, is first excavated in the soil 10. The L-shaped steel plate 9 is then fitted into the trench wall of the excavation trench 11 to complete the reinforcement. When using precast slabs to reinforce the TRD trench walls, the side plate protrusions 39 are fitted into the cover plate slots 37 to form an L-shaped structure between the trench wall cover plate 34 and the trench wall side plate 38. At the same time, the precast slab structure is fitted into the TRD trench wall by passing a steel rod 36 through the steel rod insertion hole 35 to complete the reinforcement.

[0082] When using high-pressure jet grouting piles to construct a water-stop curtain, the high-pressure jet grouting piles are assembled and welded into a mobile steel frame construction platform and placed on the construction site. The high-pressure jet grouting pile equipment is placed on the steel plate platform 12, and the construction platform is moved by the moving rollers 17, which in turn moves the high-pressure jet grouting pile equipment.

[0083] When constructing a water-stop curtain using a three-axis mixing pile, the protective cover is hooked onto the drill rod support 19 via the fixing block 21 and the hollow fixing ring 22. The three-axis mixing pile drill rod 18 drills through the soil to be constructed 24, bringing up mud that is blocked inside the protective cover 20, thus achieving the isolation of the construction mud.

[0084] When constructing a water-stop curtain using five-axis mixing piles, the five-axis construction steel-plate combination guide trough frame is assembled and placed at the initial construction point. The guide trough roller 28 drives the guide trough 33 to move along the guide rod 30, and the guide trough limiter 29 is used for limiting and fixing. The five-axis mixing pile drill rod passes through the cavity of the guide trough 33 and drills into the soil. After a row of piles is completed, it moves linearly along the guide frame crossbar 25 through the guide trough 33 to control the construction alignment of the five-axis mixing pile.

Claims

1. A multi-machine combined water-stop curtain, characterized in that, This includes underground obstacle detection technology, TRD construction trench wall reinforcement technology, high-pressure jet grouting pile mobile steel frame construction platform, three-axis construction trench closed construction environment control device, and five-axis construction steel-plate composite guide trench frame; it also includes high-pressure jet grouting pile equipment, three-axis mixing pile drilling rig, and five-axis mixing pile; The underground obstacle detection technology includes a transient surface wave detector (1), a detection radar (3), an excavation hole (4), and a geotextile bag (6) for sealing the underground passage (5). The geotextile bag (6) is arranged along the side wall of the excavation hole (4), and the geotextile bag (6) is filled with concrete (7) and has a mud seal (8). A water-stop curtain (40) is installed inside the geotextile bag (6). TRD construction trench wall reinforcement technology includes steel profiles-steel plates or precast plates. Steel profiles-steel plates include L-shaped steel plates (9), and precast plates include trench wall cover plates (34), steel rod insertion holes (35), steel rods (36), and trench wall side plates (38). The high-pressure jet grouting pile is a mobile steel frame construction platform, which includes a steel plate platform (12), a Bailey structure frame (13), a platform base plate (15), and mobile rollers (17). The three-axis construction trench closed construction environment control device includes a protective cover (20), a fixing ring (22) and a protective cover clamping ring (23), the lower part of which is welded to the protective cover (20); The five-axis construction steel-plate composite guide trough frame includes a guide frame body and a guide trough body. The guide frame body includes a guide frame crossbar (25), a guide frame vertical bar (26) and a guide rod (30). The guide trough body includes a roller fixing shaft (27), a guide trough roller (28), a roller fixing ring (31) and a guide trough (33). The guide frame includes a guide frame crossbar (25), a guide frame vertical bar (26), and a guide rod (30). The guide frame is a rectangular frame. The guide groove (33) in the guide groove is a rectangular thin-walled cavity structure. The top four corners of the guide groove (33) are welded with fixing ring connecting blocks (32). The upper part of the fixing ring connecting blocks (32) is welded with a roller fixing ring (31). The roller fixing ring (31) passes through the guide rod (30) and fixes the guide groove roller (28) on the guide rod (30) through the roller fixing shaft (27). A guide groove limiter (29) is provided on the side of the roller fixing ring (31). The guide groove (33) moves along the guide rod (30) through the guide groove roller (28) and is fixed by the guide groove (33) through the guide groove limiter (29). The drill rod of the five-axis mixing pile passes through the cavity of the guide groove (33) and drills in. The five-axis mixing pile moves with the guide groove (33).

2. The multi-machine combined water-stop curtain according to claim 1, characterized in that, The L-shaped steel plate (9) is composed of two steel plates welded vertically to the long side. When the TRD construction trench wall reinforcement technology is steel-steel plate, an excavation trench (11) is provided on the soil (10), and the L-shaped steel plate (9) is embedded in the trench wall of the excavation trench (11). The precast plate includes a trench wall cover plate (34), a steel rod insertion hole (35), a steel rod (36), and a trench wall side plate (38). The trench wall cover plate (34) and the trench wall side plate (38) are provided with steel rod insertion holes (35). One end of the trench wall cover plate (34) is provided with a cover plate slot (37), and one end of the trench wall side plate (38) is provided with a side plate protrusion (39). When the side plate protrusion (39) and the cover plate slot (37) are fitted together, the trench wall cover plate (34) and the trench wall side plate (38) form an L-shaped structure, and the steel rod (36) passes through the steel rod insertion hole (35).

3. The multi-machine combined water-stop curtain according to claim 1, characterized in that, The Bailey structure frame (13) is arranged on the platform base plate (15) and fixed by welding plate (14). The Bailey structure frame (13) is arranged on the steel plate platform (12) and fixed by welding plate (14). Roller fixing devices (16) are evenly distributed on the four sides of the platform base plate (15). The lower part of the roller fixing device (16) is fixed with a movable roller (17). The high-pressure jet grouting equipment is placed on the steel plate platform (12).

4. The multi-machine combined water-stop curtain according to claim 1, characterized in that, Hollow fixing rings (22) are provided on both sides of the protective cover clamp ring (23), and a protective cover body (20) is welded to the lower part of the protective cover clamp ring (23); fixing blocks (21) are provided at both ends of the drill rod support (19) of the three-axis mixing pile drilling machine, and the protective cover body (20) is hooked onto the drill rod support (19) through the fixing blocks (21) and fixing rings (22).

5. The multi-machine combined water-stop curtain according to claim 1, characterized in that, The guide frame includes a guide frame crossbar (25), a guide frame vertical bar (26), and a guide rod (30). The guide frame is a rectangular frame. The guide groove (33) in the guide groove is a rectangular thin-walled cavity structure. The top four corners of the guide groove (33) are welded with fixing ring connecting blocks (32). The upper part of the fixing ring connecting blocks (32) is welded with a roller fixing ring (31). The roller fixing ring (31) passes through the guide rod (30) and fixes the guide groove roller (28) on the guide rod (30) through the roller fixing shaft (27). A guide groove limiter (29) is provided on the side of the roller fixing ring (31). The guide groove (33) moves along the guide rod (30) through the guide groove roller (28) and is fixed by the guide groove (33) through the guide groove limiter (29). The drill rod of the five-axis mixing pile passes through the cavity of the guide groove (33) and drills in. The five-axis mixing pile moves with the guide groove (33).

6. The construction method of the multi-machine combined water-stop curtain as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1: Detection of underground obstacles. If an underground passage (5) is found, the excavation hole (4) is enlarged and the side wall of the excavation hole (4) is sealed with geotextile bags (6). After pouring concrete (7), a water-stop curtain (40) is constructed. Step 2: Multi-machine joint construction of water-stop curtain, water-stop curtain (40) is constructed according to the condition of the foundation pit; For small foundation pits, the retaining wall on the side adjacent to the building is a diaphragm wall, and the water-stop curtain is constructed by high-pressure jet grouting piles on both sides of the diaphragm wall (40); the retaining wall on the side not adjacent to the building is a diaphragm wall, and the water-stop curtain is constructed by five-axis mixing piles on both sides of the diaphragm wall (40). For large foundation pits, a five-axis cement mixing pile is used to construct a water-stop curtain (40) on the side adjacent to the building, and a diaphragm wall is used on the side adjacent to the road. A TRD construction water-stop curtain (40) is used on the outside of the diaphragm wall, and a five-axis cement mixing pile is used to construct a water-stop curtain (40) on the inside.

7. The construction method of the multi-machine combined water-stop curtain according to claim 6, characterized in that, In step one: For shallow areas with a burial depth of less than 3 meters, local excavation or drilling is carried out, and transient surface wave detector (1) is used to verify whether there is an underground passage (5); for deep areas with a burial depth of more than 3 meters, detection radar (3) is used in conjunction with excavation hole (4) to detect obstacles or underground passages (5) in the pile foundation construction area; if an underground passage (5) is found, the excavation hole (4) is expanded to exceed the construction area of ​​the water-stop curtain (40), and geotextile bags (6) are used to seal the side wall of the excavation hole (4), and then concrete (7) is poured into the geotextile bags (6), and finally the top is sealed with mud (8). After the structure hardens and reaches the strength, the water-stop curtain (40) is constructed in the geotextile bags (6).

8. The construction method of the multi-machine combined water-stop curtain according to claim 6, characterized in that, In step two: When using TRD to construct the water-stop curtain, the TRD trench wall is reinforced with steel profiles and steel plates or precast plates. When using steel profiles and steel plates to reinforce the TRD trench wall, the trench required for TRD construction, i.e., the excavation trench (11), is first excavated in the soil (10). The L-shaped steel plate (9) is then fitted into the trench wall of the excavation trench (11) to complete the reinforcement. When using precast plates to reinforce the TRD trench wall, the side plate protrusion (39) is fitted into the cover plate slot (37) so that the trench wall cover plate (34) and the trench wall side plate (38) form an L-shaped structure. At the same time, the precast plate structure is fitted into the TRD trench wall by passing the steel rod (36) through the steel rod insertion hole (35) to complete the reinforcement. When using high-pressure jet grouting piles to construct a water-stop curtain, the high-pressure jet grouting pile is assembled and welded into a mobile steel frame construction platform and placed on the construction site. The high-pressure jet grouting pile equipment is placed on a steel plate platform (12), and the construction platform is moved by the moving rollers (17), which in turn moves the high-pressure jet grouting pile equipment. When constructing a water-stop curtain using five-axis mixing piles, the five-axis construction steel-plate combination guide trough frame is assembled and placed at the initial construction point. The guide trough roller (28) drives the guide trough (33) to move along the guide rod (30). The guide trough limiter (29) is used for limiting and fixing. The five-axis mixing pile drill rod passes through the cavity of the guide trough (33) and drills into the soil. After a row of piles is completed, the guide trough (33) moves linearly along the guide frame crossbar (25) to control the construction line of the five-axis mixing pile.

9. The construction method of the multi-machine combined water-stop curtain according to claim 6, characterized in that, When constructing a water-stop curtain using a three-axis mixing pile, the protective cover (20) is hooked onto the drill rod support (19) via a fixing block (21) and a fixing ring (22). The three-axis mixing pile drill rod (18) drills through the soil to be constructed (24), bringing up mud which is then contained within the protective cover (20).

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