A construction system for casting guide walls of underground continuous walls

Abstract

This application relates to a construction system for casting guide walls of diaphragm walls, belonging to the field of diaphragm wall construction. It includes a steel reinforcement frame and a casting template. Two steel reinforcement frames are provided, each located on an opposite wall within a trench. A detachable connecting frame connects the two steel reinforcement frames. Fixed rods that can be inserted into the ground are slidably mounted on each steel reinforcement frame. This application improves the relative positional accuracy and stability of the two steel reinforcement frames through the detachable connecting frame, thereby providing a stable and precise installation foundation for the subsequent casting template, ultimately improving the casting quality of the guide wall.

Description

Technical Field

[0001] This application relates to the field of diaphragm wall construction, and in particular to a diaphragm wall guide wall casting construction system. Background Technology

[0002] Guide walls are a construction measure used by construction companies. Before trenching for diaphragm walls, guide walls must be constructed. Guide walls are crucial to ensuring the accurate positioning of diaphragm walls and the quality of trenching. During construction, guide walls are frequently subjected to static and dynamic loads from steel reinforcement frames, concrete pouring pipes, drilling rigs, etc. Therefore, careful design and construction are essential before the formal construction of diaphragm walls can proceed.

[0003] The construction sequence of the guide wall is as follows: site leveling, location measurement, trench excavation and spoil disposal, placement of reinforcing steel frame, erection of guide wall formwork, pouring and curing of guide wall concrete, and removal of formwork. Two sets of reinforcing steel frames are installed, located on opposite sides of the trench, ultimately forming opposing concrete guide walls on both sides of the trench. To ensure that it meets the guiding and load-bearing requirements of subsequent diaphragm wall construction, high standards are placed on the dimensions, planar alignment, verticality, and thickness of the reinforcing steel protective layer during construction.

[0004] The steel reinforcement frame is one of the important foundations for supporting and positioning the formwork. Since the steel reinforcement frame is continuously arranged along the length of the trench and the steel reinforcement frame on the side of the trench beam is relatively independent, defects such as uneven guide wall alignment, uneven spacing, and poor verticality often occur in the early stage of construction. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a construction system for casting guide walls for underground continuous walls.

[0006] The technical solution of the underground continuous wall guide wall casting construction system provided in this application is as follows:

[0007] A construction system for casting a guide wall for a diaphragm underground wall includes a steel reinforcement frame and a casting template. Two steel reinforcement frames are provided and are located at opposite trench walls. A connecting frame is detachably connected between the two steel reinforcement frames. A fixing rod that can be inserted into the ground is slidably installed on the steel reinforcement frame.

[0008] By adopting the above technical solution, during the process of placing the steel reinforcement frame into the trench, the two steel reinforcement frames improve the overall integrity through the connecting frame, and the relative distance between the two steel reinforcement frames is also kept stable and uniform. After the fixing rod is inserted into the ground, the connecting frame is removed, and then the pouring formwork is erected. The steel reinforcement frame can provide more precise and stable support for the pouring formwork.

[0009] Preferably, a fixing sleeve for the fixing rod to pass through is fixedly connected to the steel reinforcement frame, and the axis of the fixing sleeve is perpendicular to the ground.

[0010] Preferably, the steel reinforcement frame includes horizontal and vertical sections that are fixedly connected to each other. A wing groove is provided on the ground at the opening of the trench. The horizontal section is located in the wing groove, and the vertical section is located in the trench. Multiple fixing sleeves are provided and evenly distributed on the horizontal and vertical sections. The fixing rod includes a long rod and a short rod. The short rod passes through the fixing sleeve located on the horizontal section, and the long rod passes through the fixing sleeve located on the vertical section and is coaxially threaded to the fixing sleeve on the vertical section.

[0011] By adopting the above technical solution, before placing the steel reinforcement frame into the trench, the long rod is fixed relative to the fixed sleeve on the vertical section through the threaded pair. After the steel reinforcement frame is stably placed in the trench, the long rod is rotated downward to release the threaded connection between it and the fixed sleeve. At the same time, the short rod is inserted into the fixed sleeve on the horizontal section. Then, tools such as a hammer are used to drive each fixed rod downward so that the lower end of each fixed rod is inserted into the wing groove or the bottom of the trench below the ground, thereby achieving a relatively fixed connection between the steel reinforcement frame and the ground.

[0012] Preferably, the docking frame is fixedly connected with multiple docking pins, and the side of the steel bar frame away from the trench wall is fixedly connected with multiple docking sleeves. The axis of the docking sleeve is consistent with the depth direction of the trench, and each docking sleeve is for inserting one docking pin.

[0013] By adopting the above technical solution, the lateral positional relationship between the docking frame and the rebar frame is stabilized after the docking pin on the docking frame is inserted into the docking sleeve on the rebar frame.

[0014] Preferably, a docking ring is fixedly connected to the docking frame, and a docking nut is fixedly connected to the end of the reinforcing bar frame located away from the bottom of the trench. A docking bolt is passed through the docking ring and is threadedly connected to the docking nut.

[0015] By adopting the above technical solution, the connecting frame and the rebar frame are temporarily fixed together through the threaded pair. During the process of hoisting the rebar frame into the trench, the connecting frame and the rebar frame are connected. After the rebar frame is fixed to the ground, the connecting frame is removed to provide space for the installation of the pouring formwork.

[0016] Preferably, the side of the casting template facing the reinforcing bar frame is detachably connected with a positioning pin, which can be inserted into the mating sleeve.

[0017] By adopting the above technical solution, the cooperation between the positioning pin and the connecting sleeve is used to determine the lateral relative position between the casting formwork and the steel reinforcement frame.

[0018] Preferably, an installation cylinder is fixedly connected to the positioning pin hook, one end face of the installation cylinder abuts against the side of the casting template facing the rebar frame, the positioning pin hook is located at the end of the installation cylinder away from the casting template, an installation screw is threaded through the casting template, the length direction of the installation screw is perpendicular to the surface of the casting template, the two ends of the installation screw are respectively located on opposite sides of the casting template, the installation screw and the installation cylinder are coaxially threadedly connected, and an abutment plate is fixedly connected to the installation screw coaxially, the abutment plate abuts against the side of the casting template away from the rebar frame.

[0019] By adopting the above technical solution, the mounting cylinder with positioning pin hook achieves a detachable connection with the casting template through the mounting screw with abutment plate.

[0020] Preferably, there are two casting templates with parallel surfaces. Multiple support beams are provided between the two casting templates. Each support beam includes an adjusting screw and two adjusting cylinders. The two adjusting cylinders are threaded to opposite ends of the adjusting screw. The end of the adjusting cylinder away from the middle of the adjusting screw abuts against the casting template or the abutment plate.

[0021] By adopting the above technical solution, the support beam is used to create a uniform gap between the two casting templates, while improving the stability of the casting template and the steel reinforcement frame.

[0022] Preferably, the adjusting cylinder is coaxially sleeved on the mounting screw. Both the adjusting cylinder and the mounting screw have elongated holes. The length direction of the elongated hole on the adjusting cylinder is the circumferential direction of the adjusting cylinder, and the length direction of the elongated hole on the mounting screw is the length direction of the mounting screw. When the adjusting cylinder abuts against the casting template, the elongated hole on the adjusting cylinder and the elongated hole on the mounting screw are connected.

[0023] By adopting the above technical solution, after the concrete of the guide wall is poured and cured, the support beam and the pouring formwork are removed. Using a pry bar-like tool, the operator can simultaneously apply torque to the adjusting cylinder and the installation screw by passing through the long hole on both the adjusting cylinder and the installation screw, so that the adjusting cylinder is moved away from the pouring formwork and the installation screw is withdrawn from the installation cylinder.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By setting up the connecting frame, the two steel bars are improved in integrity during the process of placing the steel bar frame into the trench. At the same time, the relative distance between the two steel bar frames is kept stable and uniform. After the fixing rod is inserted into the ground, the connecting frame is removed and the pouring formwork is then built. The steel bar frame can provide more precise and stable support for the pouring formwork.

[0026] 2. By using the installation cylinder, installation screw, and connecting beam, the connecting beam supports the two casting templates while the adjusting cylinder and installation screw of the connecting beam work together. After the guide wall concrete has cured, the rod is passed through the adjusting cylinder and the installation screw at the same time, which can loosen the connecting beam and unscrew the installation screw from the installation cylinder, thus facilitating the removal of the template. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram illustrating the underground continuous wall guide wall pouring construction system in the embodiments of this application.

[0028] Figure 2 This is a schematic diagram illustrating the placement of the steel reinforcement frame in the trench in the embodiments of this application.

[0029] Figure 3 This is a schematic diagram illustrating the structure of the docking frame being pulled out of the trench in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram illustrating the structure of placing the casting template in the trench and setting up the supporting beam in the embodiment of this application.

[0031] Figure 5 This is a structural schematic diagram used in the embodiments of this application to illustrate the cooperation between the support beam and the casting template.

[0032] Figure 6 This is a structural schematic diagram used in the embodiments of this application to illustrate the support beam.

[0033] Explanation of reference numerals in the attached drawings: 1. Trench; 11. Wing groove; 2. Reinforcing bar frame; 21. Vertical section; 22. Horizontal section; 23. Butt sleeve; 24. Butt nut; 241. Butt bolt; 25. Fixing sleeve; 26. Butt frame; 261. Butt pin; 262. Butt ring; 27. Fixing rod; 271. Long rod; 272. Short rod; 3. Casting formwork; 31. Positioning pin hook; 32. Installation cylinder; 33. Installation screw; 331. Abutment plate; 34. Support beam; 341. Adjusting screw; 342. Adjusting cylinder; 35. Long hole. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a construction system for casting guide walls for underground continuous walls, such as... Figure 1 As shown, it includes a steel reinforcement frame 2 and a casting template 3, which will be placed in the trench 1 one after the other. During the construction of the guide wall, the steel reinforcement frame 2 serves as the internal reinforcing skeleton of the guide wall, and the template and the bottom and walls of the trench 1 together form the concrete pouring space of the guide wall.

[0036] like Figure 1 and 2 As shown, trench 1 is oriented on the ground with its opening facing directly upwards. Wing grooves 11 are formed on both sides of the opening of trench 1, with the bottom of the wing grooves 11 connected to the wall of trench 1 and perpendicular to it. There are two reinforcing bar frames 2, located on opposite sides of trench 1. Each reinforcing bar frame 2 includes a horizontal section 22 and a vertical section 21 fixedly connected to each other. The horizontal section 22 is located within the wing grooves 11, and the vertical section 21 is located within trench 1. The lower part of the horizontal section 22 contacts the bottom of the wing grooves 11, and the side of the vertical section 21 contacts the wall of trench 1. Projected along the length of trench 1, the reinforcing bar frame 2 is inverted "L" shape. The reinforcing bar frame 2 enters trench 1 before the casting formwork 3. When placing the reinforcing bar frame 2, a detachable connecting frame 26 is installed between the two opposing reinforcing bar frames 2. The docking frame 26 is welded from several steel rods. Multiple docking pins 261 are fixedly connected to the docking frame 26. Multiple docking sleeves 23 are welded and fixed to the side of the vertical section 21 of the docking frame 26 away from the groove wall of the groove 1. The axis of the docking sleeve 23 is consistent with the depth direction of the groove 1. Each docking sleeve 23 is inserted into one docking pin 261. In the top view, each docking sleeve 23 and docking pin 261 does not overlap. A docking ring 262 is welded and fixed on the docking frame 26. A docking nut 24 is fixedly connected to the end of the rebar frame 2 located away from the bottom of the trench 1. A docking bolt 241 is passed through the docking ring 262 and threadedly connected to the docking nut 24, thereby realizing the connection between the docking frame and the rebar frame 2. At the same time, with the cooperation of each docking pin 261 and docking sleeve 23, the relative positional relationship between the docking frame 26 and the rebar frame 2 remains stable. The relative position and relative posture between the two rebar frames 2 can also be kept stable through the docking frame 26.

[0037] like Figure 2 and 3As shown, a fixing sleeve 25 is fixedly connected to the rebar frame 2. Multiple fixing sleeves 25 are evenly distributed on the horizontal section 22 and the vertical section 21, and the axis of each fixing sleeve 25 is vertical. A fixing rod 27 is slidably connected to the rebar frame 2 via the fixing sleeves 25, and the fixing sleeves 25 allow the fixing rod 27 to pass through coaxially. The fixing rod 27 includes a long rod 271 and a short rod 272. The short rod 272 passes through the fixing sleeve 25 located on the horizontal section 22, and the long rod 271 passes through the fixing sleeve 25 located on the vertical section 21 and can be coaxially threadedly connected to the fixing sleeve 25 on the vertical section 21. Before the rebar frame 2 is placed into the trench 1, the long rod 271 is fixed relative to the fixing sleeve 25 on the vertical section 21 via a threaded connection. After the rebar frame 2 is stably placed in the trench 1, the long rod 271 is rotated downwards to make it threadedly connected to the fixing sleeve 25. The state is released, and the short rod 272 is inserted into the fixing sleeve 25 on the horizontal section 22. Then, using a hammer or other tools, each fixing rod 27 is driven downward so that the lower end of each fixing rod 27 is inserted into the ground below the bottom of the wing groove 11 or trench 1, thereby achieving a relatively fixed connection between the steel frame 2 and the ground entity. After the fixing rod 27 is inserted into the ground, the fixing rod 27 and the fixing sleeve 25 can be spot welded to fix them. After the welding is completed, the connecting bolt 241 is unscrewed, and the connecting frame 26 is pulled up and removed to complete the installation of the steel frame 2.

[0038] like Figure 4 and 5 As shown, after the connecting frame 26 is removed from the trench 1, the casting template 3 is installed. Two casting templates 3 are also provided, and their surfaces are parallel. A positioning pin 31 is detachably connected to the side of the casting template 3 facing the rebar frame 2. After the connecting frame 26 is removed, the connecting sleeve 23 on the rebar frame 2 is used to insert and engage the positioning pin 31 on the casting template 3. An installation cylinder 32 is fixedly connected to the positioning pin 31. One end face of the installation cylinder 32 is fixedly connected to the positioning pin 31, and the other end face will abut against the side of the casting template 3 facing the rebar frame 2. An installation screw 33 is threaded through the casting template 3. The two ends of the installation screw 33 are located on opposite sides of the casting template 3. The length direction of the installation screw 33 is perpendicular to the surface of the casting template 3. The installation screw 33 is coaxially threaded to the installation cylinder 32. An abutment plate 331 is coaxially fixedly connected to the installation screw 33. The abutment plate 331 abuts against the side of the casting template 3 away from the steel frame 2. That is, the installation cylinder 32 with positioning pins 31 is detachably connected to the casting template 3 through the installation screw 33 with abutment plate 331. After each positioning pin 31 is inserted into the corresponding docking sleeve 23, the casting template 3 is relatively positioned with the steel frame 2.

[0039] like Figure 4 , 5As shown in Figure 6, multiple supporting beams 34 are provided between two opposing casting templates 3. The length direction of the supporting beams 34 is perpendicular to the surface of the casting templates 3. Each supporting beam 34 includes an adjusting screw 341 and two adjusting cylinders 342. The two adjusting cylinders 342 are coaxially threaded to opposite ends of the adjusting screw 341, meaning that the overall length of the supporting beam can be changed when the adjusting cylinders 342 rotate relative to the adjusting screw 341. The opposite ends of the two adjusting cylinders 342 apply a thrust to the surfaces of the two casting templates 3, thereby achieving the mutual support of the two casting templates 3.

[0040] like Figure 5 and 6 As shown, the adjusting cylinder 342 is coaxially sleeved on the mounting screw 33 on the side of the casting template 3 away from the reinforcing bar frame 2. The end face of the adjusting cylinder 342 facing the casting template 3 abuts against the side of the abutment plate 331 away from the casting template 3. Both the adjusting cylinder 342 and the mounting screw 33 are provided with elongated holes 35. The length direction of the elongated hole 35 on the adjusting cylinder 342 is the circumferential direction of the adjusting cylinder 342, and the length direction of the elongated hole 35 on the mounting screw 33 is the length direction of the mounting screw 33. Therefore, when the adjusting cylinder 342 abuts against the casting template 3, the elongated hole 35 on the adjusting cylinder 342 can communicate with the elongated hole 35 on the mounting screw 33. After the concrete of the guide wall is poured and cured, the support beam 34 and the casting template 3 are removed. Using a pry bar-like tool, the operator can simultaneously pass through the elongated hole 35 on the adjusting cylinder 342 and the mounting screw 33, and apply torque to the adjusting cylinder 342 and the mounting screw 33 at the same time, so that the adjusting cylinder 342 is moved away from the casting template 3 and the mounting screw 33 is pulled out of the mounting cylinder 32. After the support beam 34 and the mounting screw 33 are removed from the trench 1, the casting template 3 will have the space to be removed, and the mounting cylinder 32 and the positioning pin 31 will remain in the concrete structure of the guide wall.

[0041] The implementation principle of a diaphragm wall guide wall casting construction system according to an embodiment of this application is as follows:

[0042] During the placement of the steel reinforcement frame 2, the connecting frame 26 improves the relative positional stability of the two steel reinforcement frames 2, making the relative placement posture of the steel reinforcement frames 2 in the trench 1 more uniform and regular. After fixing the steel reinforcement frame 2 to the ground by the fixing rod 27, the connecting frame 26 is removed. Then, the pouring template 3 is placed and assembled. The cooperation between the connecting sleeve 23 and the positioning pin hook 31 can play the role of positioning the pouring template 3.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A diaphragm wall guide wall pouring construction system comprising a reinforcing cage (2) and a pouring formwork (3), the reinforcing cage (2) being provided with two and located at opposite groove walls in a trench (1) respectively, characterized in that: A connecting frame (26) is detachably connected between the two steel bar frames (2), and a fixing rod (27) that can be inserted into the ground is slidably provided on the steel bar frame (2); The steel frame (2) is fixedly connected to a fixing sleeve (25) through which the fixing rod (27) passes, and the axis of the fixing sleeve (25) is perpendicular to the ground; Multiple docking pins (261) are fixedly connected to the docking frame (26), and multiple docking sleeves (23) are fixedly connected to the side of the steel bar frame (2) away from the trench wall (1). The axis of the docking sleeve (23) is consistent with the depth direction of the trench (1), and a single docking sleeve (23) is used for the insertion of one docking pin (261). The casting template (3) is detachably connected to a positioning pin (31) on the side facing the steel frame (2), and the positioning pin (31) can be inserted into the connecting sleeve (23); An installation cylinder (32) is fixedly connected to the positioning pin (31). One end face of the installation cylinder (32) abuts against the side of the casting template (3) facing the steel reinforcement frame (2). The positioning pin (31) is located at the end of the installation cylinder (32) away from the casting template (3). An installation screw (33) is threaded through the casting template (3). The length direction of the installation screw (33) is perpendicular to the surface of the casting template (3). The two ends of the installation screw (33) are located on opposite sides of the casting template (3). The installation screw (33) is coaxially threaded to the installation cylinder (32). An abutment plate (331) is coaxially fixedly connected to the installation screw (33). The abutment plate (331) abuts against the side of the casting template (3) away from the steel reinforcement frame (2). Two casting templates (3) are provided, and the surfaces of the two casting templates (3) are parallel. Multiple support beams (34) are provided between the two casting templates (3). Each support beam (34) includes an adjusting screw (341) and two adjusting cylinders (342). The two adjusting cylinders (342) are respectively threaded to the opposite ends of the adjusting screw (341). The end of the adjusting cylinder (342) away from the middle of the adjusting screw (341) abuts against the abutting plate (331). The adjusting cylinder (342) is coaxially sleeved on the mounting screw (33). Both the adjusting cylinder (342) and the mounting screw (33) are provided with elongated holes (35). The length direction of the elongated hole (35) on the adjusting cylinder (342) is the circumferential direction of the adjusting cylinder (342), and the length direction of the elongated hole (35) on the mounting screw (33) is the length direction of the mounting screw (33). When the adjusting cylinder (342) abuts against the abutting plate (331), the elongated hole (35) on the adjusting cylinder (342) and the elongated hole (35) on the mounting screw (33) are connected.

2. The underground continuous wall guide wall pouring construction system according to claim 1, characterized in that: The steel reinforcement frame (2) includes a horizontal section (22) and a vertical section (21) that are fixedly connected to each other. A wing groove (11) is provided on the ground and at the opening of the trench (1). The horizontal section (22) is located in the wing groove (11), and the vertical section (21) is located in the trench (1). Multiple fixing sleeves (25) are provided and evenly distributed on the horizontal section (22) and the vertical section (21). The fixing rod (27) includes a long rod (271) and a short rod (272). The short rod (272) passes through the fixing sleeve (25) located on the horizontal section (22), and the long rod (271) passes through the fixing sleeve (25) located on the vertical section (21) and is coaxially threadedly connected to the fixing sleeve (25) on the vertical section (21).

3. The underground continuous wall guide wall pouring construction system according to claim 1, characterized in that: A docking ring (262) is fixedly connected to the docking frame (26), and a docking nut (24) is fixedly connected to the end of the steel bar frame (2) located away from the bottom of the trench (1). A docking bolt (241) is passed through the docking ring (262), and the docking bolt (241) passes through the docking ring (262) and is threadedly connected to the docking nut (24).

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