Prefabricated underground diaphragm wall inter-width segmental connecting piece

Abstract

The utility model discloses a prefabricated underground diaphragm wall inter-breadth segmental connecting piece which comprises an omega-shaped inter-breadth connecting piece and a T-shaped inter-breadth connecting piece, the omega-shaped inter-breadth connecting piece is arranged in a groove of the Nth prefabricated underground diaphragm wall, and an opening of the omega-shaped inter-breadth connecting piece faces the (N + 1) th prefabricated underground diaphragm wall. The T-shaped inter-width connecting piece is arranged in the tenon of the (N + 1) th prefabricated underground diaphragm wall, the omega-shaped inter-width connecting piece and the T-shaped inter-width connecting piece are used for inter-width connection, and inter-width cold joints are formed between the adjacent prefabricated underground diaphragm walls and between the omega-shaped inter-width connecting piece and the T-shaped inter-width connecting piece. The web plate of the T-shaped inter-width connecting piece perpendicularly stretches across the inter-width cold seam, then a permanent water stop steel plate is formed between the adjacent prefabricated underground diaphragm walls, and after anti-corrosion treatment, the waterproof and durability requirements of the inter-width seam water stop steel plate within the permanent service life period can be met. High-precision, high-efficiency and high-quality assembly of the prefabricated underground diaphragm wall is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground structure engineering, and particularly relates to a precast diaphragm wall sectional joint between adjacent panels. Background Art

[0002] The technology of prefabricated construction has been developing increasingly maturely, and the technology of prefabricated diaphragm wall construction has also ushered in a new situation of rapid development.

[0003] Prefabricated diaphragm walls have made breakthrough progress in terms of quality, waterproofing and durability through standardized, large-scale and information-based production and manufacturing in factories. As a result, the diaphragm walls, which were originally used as temporary retaining structures in traditional underground engineering, now meet the requirements for permanent structures in underground engineering. Therefore, prefabricated diaphragm walls can be used as both temporary retaining structures for foundation pit engineering and structural side walls for underground engineering. The combination of the two functions not only saves a large amount of construction materials and construction sites, but also achieves the construction goals of energy conservation and carbon reduction. While meeting the requirements of fast, convenient and high-quality construction on site, prefabricated diaphragm walls inevitably form a large number of assembly cold joints between the permanent structural side walls of underground engineering.

[0004] Therefore, in order to comprehensively promote precast underground diaphragm walls in underground engineering, it is urgent for us to solve the problems of high-precision assembly of precast underground diaphragm walls and the waterproofing, durability and strength of cold joints between adjacent panels during the permanent service life. Summary of the Utility Model

[0005] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a precast diaphragm wall sectional joint between adjacent panels.

[0006] The technical solution of the utility model is: a steel sectional joint between adjacent panels of a precast diaphragm wall, including an Ω-shaped joint between adjacent panels and a T-shaped joint between adjacent panels. The Ω-shaped joint between adjacent panels is arranged in the groove of the Nth precast underground diaphragm wall, and the opening of the Ω-shaped joint between adjacent panels faces the (N + 1)th precast underground diaphragm wall. The T-shaped joint between adjacent panels is arranged in the tenon of the (N + 1)th precast underground diaphragm wall. The Ω-shaped joint between adjacent panels and the T-shaped joint between adjacent panels are connected between adjacent panels, and cold joints are formed between adjacent precast underground diaphragm walls and between the Ω-shaped joint between adjacent panels and the T-shaped joint between adjacent panels.

[0007] Furthermore, anchor bolts for fixing are arranged in the groove of the Nth precast underground diaphragm wall, and the Ω-shaped joint between adjacent panels is fixed to the anchor bolts through a first anchoring structure.

[0008] Furthermore, the Ω-shaped joint between adjacent panels is of sectional assembly and fixed type, and the Ω-shaped joint between adjacent panels includes an upper Ω-shaped section, a middle Ω-shaped section and a lower Ω-shaped section.

[0009] Furthermore, the Ω-shaped cavities in the Ω-shaped upper segment, the Ω-shaped middle segment, and the Ω-shaped lower segment are connected, and a sealing steel plate for sealing the lower part of the Ω-shaped cavity is arranged in the Ω-shaped lower segment.

[0010] Furthermore, anchor bolts for fixation are arranged in the tenons of the (N + 1)-th precast diaphragm wall, and the T-shaped inter-panel connector and the anchor bolts are fixed through a second anchoring structure.

[0011] Furthermore, the T-shaped inter-panel connector includes a circular seamless steel pipe and a T-shaped steel plate. The circular seamless steel pipe is matched with the Ω-shaped cavity of the Ω-shaped inter-panel connector, and the outer wall of the circular seamless steel pipe is connected to the T-shaped steel plate.

[0012] Furthermore, the T-shaped inter-panel connector is of a segmented assembly and fixed type, and the T-shaped inter-panel connector includes a T-shaped upper segment at the upper part, a T-shaped middle segment in the middle part, and a T-shaped lower segment at the lower part.

[0013] Furthermore, the lower end of the T-shaped lower segment forms a reduced-diameter closing opening.

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

[0015] In the present utility model, the Ω-shaped inter-panel connector and the T-shaped inter-panel connector are provided with circular seamless steel pipes of different diameters. The steel pipes and steel sections are made of steel with a strength of Q355B or above. By utilizing the isotropic characteristics of the circular structure, combined with the high-precision processing of the connector and the anchoring effect of the anchor bolts, the high-precision guiding and assembly of the precast diaphragm wall are jointly ensured and realized, and the inter-panel assembly error can be controlled within 10 mm.

[0016] In the present utility model, the inter-panel connector of the (N + 1)-th precast diaphragm wall is designed in a "T" shape. By using the web of the T-shaped inter-panel connector to vertically span the inter-panel cold joint, a permanent water-stop steel plate is formed between adjacent precast diaphragm walls. After anti-corrosion treatment, it can meet the waterproof and durability requirements of the water-stop steel plate at the inter-panel joint during the permanent service life.

[0017] After the precise assembly of the precast diaphragm wall in the present utility model is completed, by injecting high-pressure cement slurry into the circular seamless steel pipe at the front end of the T-shaped inter-panel connector, the gap between the circular seamless steel pipe and the C-shaped seamless steel pipe and the inter-panel cold joint are filled and compacted, further strengthening and sealing the inter-panel cold joint, enhancing the inter-panel waterproof and corrosion resistance capabilities; at the same time, it also avoids the direct contact between the steel connector and the external environment, further ensuring the structural strength, integrity, and durability of the steel connector during the service life. The waterproof and durability problems of the inter-panel cold joint of the precast diaphragm wall are solved.

[0018] In the present utility model, the Ω-shaped and T-shaped inter-panel connectors are designed in segmented sections, and socket-and-spigot upper and lower rabbets are provided at the joints of the segments. By reducing the design length of the inter-panel connectors, the deformation of the connectors during processing, transportation, and installation can be effectively reduced; the inter-panel connectors are precisely spliced through the socket-and-spigot upper and lower rabbets in the precast component factory, and the joints of the inter-panel connector segments are penetration-welded; through the above measures, the high-precision processing of the inter-panel connectors can be achieved.

[0019] After the inter-panel connectors in the present utility model are connected to form a complete component, the anchor bolts can be quickly screwed in, and the inter-panel connectors and their anchoring structures can be integrally installed and fixed in the reserved conditions of the precast diaphragm wall mold, so as to achieve the high-precision positioning and installation of the inter-panel connectors, and meet the service requirements of permanent components through the anchoring of the anchor bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a plan view after the adjacent panels of the precast diaphragm wall in the present utility model are assembled;

[0021] Figure 2 is a detailed drawing of the Ω-shaped inter-panel connector and its anchoring in the present utility model;

[0022] Figure 3 is a detailed drawing of the T-shaped inter-panel connector and its anchoring in the present utility model;

[0023] Figure 4 is a detailed drawing of the segmented sections of the Ω-shaped inter-panel connector in the present utility model and the upper and lower rabbets at the joints of the segments;

[0024] Figure 5 is the Ω-shaped inter-panel connector in the present utility model Figure 4 in each sectional view;

[0025] Figure 6 is a detailed drawing of the welded joint of the Ω-shaped inter-panel connector segments in the present utility model;

[0026] Figure 7 is a detailed drawing of the segmented sections of the T-shaped inter-panel connector in the present utility model and the upper and lower rabbets at the joints of the segments;

[0027] Figure 8 is the T-shaped inter-panel connector in the present utility model Figure 6 in each sectional view;

[0028] Figure 9 is a detailed drawing of the welded joint of the T-shaped inter-panel connector segments in the present utility model;

[0029] Wherein:

[0030] 1 The Nth panel of the precast diaphragm wall

[0031] 2nd precast diaphragm wall of the N+1th

[0032] 3 Inter-sheet cold joint, 4 Ω-shaped inter-sheet connector

[0033] 5 T-shaped inter-sheet connector, 6 Anchor bolts

[0034] 7 Reinforcement connection sleeve, 8 Nut

[0035] 9 Cement slurry reinforcement enclosure, 10 C-shaped seamless steel pipe

[0036] 11 L-shaped steel plate, 12 T-shaped steel plate

[0037] 13 Bolt hole, 14 Round seamless steel perforated pipe

[0038] 15 Grouting hole, 16 Ω-shaped segment upper rabbet

[0039] 17 Ω-shaped segment lower rabbet, 18 Plugging steel plate

[0040] 19 T-shaped segment upper rabbet, 20 T-shaped segment lower rabbet

[0041] 21 Full penetration welding

[0042] 4-1 Ω-shaped upper segment, 4-2 Ω-shaped middle segment

[0043] 4-3 Ω-shaped lower segment

[0044] 5-1 T-shaped upper segment, 5-2 T-shaped middle segment

[0045] 5-3 T-shaped lower segment. Detailed implementation mode

[0046] Hereinafter, the present utility model will be described in detail with reference to the accompanying drawings and embodiments:

[0047] As Figures 1 to 9 shown, a precast diaphragm wall inter-sheet steel separable joint includes an Ω-shaped inter-sheet connector 4 and a T-shaped inter-sheet connector 5. The Ω-shaped inter-sheet connector 4 is arranged in the groove of the Nth precast diaphragm wall 1, and the opening of the Ω-shaped inter-sheet connector 4 faces the (N + 1)th precast diaphragm wall 2. The T-shaped inter-sheet connector 5 is arranged in the tenon of the (N + 1)th precast diaphragm wall 2. The Ω-shaped inter-sheet connector 4 and the T-shaped inter-sheet connector 5 are connected between sheets, and an inter-sheet cold joint 3 is formed between adjacent precast diaphragm walls and between the Ω-shaped inter-sheet connector 4 and the T-shaped inter-sheet connector 5.

[0048] Anchor bolts 6 for fixing are arranged in the groove of the Nth precast diaphragm wall 1, and the Ω-shaped inter-sheet connector 4 and the anchor bolts 6 are fixed through a first anchoring structure.

[0049] The Ω-shaped intermediate connection member 4 is of a segmented assembly and fixed type. The Ω-shaped intermediate connection member 4 includes an upper Ω-shaped upper segment 4-1, a middle Ω-shaped intermediate segment 4-2, and a lower Ω-shaped lower segment 4-3.

[0050] The Ω-shaped cavities in the Ω-shaped upper segment 4-1, the Ω-shaped intermediate segment 4-2, and the Ω-shaped lower segment 4-3 are connected. A sealing steel plate 18 for sealing the lower part of the Ω-shaped cavity is arranged in the Ω-shaped lower segment 4-3.

[0051] An anchor bolt 6 for fixing is arranged in the tenon of the (N + 1)-th precast diaphragm wall 2. The T-shaped intermediate connection member 5 and the anchor bolt 6 are fixed through a second anchoring structure.

[0052] The T-shaped intermediate connection member 5 includes a circular seamless steel pipe 14 and a T-shaped steel plate 12. The circular seamless steel pipe 14 is matched with the Ω-shaped cavity of the Ω-shaped intermediate connection member 4, and the outer wall of the circular seamless steel pipe 14 is connected to the T-shaped steel plate 12.

[0053] The T-shaped intermediate connection member 5 is of a segmented assembly and fixed type. The T-shaped intermediate connection member 5 includes an upper T-shaped upper segment 5-1, a middle T-shaped intermediate segment 5-2, and a lower T-shaped lower segment 5-3.

[0054] The lower end of the T-shaped lower segment 5-3 forms a reduced-diameter closing opening.

[0055] Specifically, the Ω-shaped intermediate connection member 4 includes a C-shaped seamless steel pipe 10 and an L-shaped steel plate 11. The short side of the L-shaped steel plate 11 is connected to the opening of the C-shaped seamless steel pipe 10, and the long sides of the two L-shaped steel plates 11 face away from each other and are coplanar. The Ω-shaped intermediate connection member 4 is formed by the C-shaped seamless steel pipe 10 and two L-shaped steel plates 11.

[0056] Specifically, the first anchoring structure includes a reinforcing bar connecting sleeve 7. The reinforcing bar connecting sleeve 7 is arranged at the long side of the L-shaped steel plate 11 and is on the same side as the C-shaped seamless steel pipe 10. The reinforcing bar connecting sleeves 7 on the two L-shaped steel plates 11 are symmetrically arranged along the C-shaped seamless steel pipe 10, and the anchor bolt 6 is fixed to the reinforcing bar connecting sleeve 7.

[0057] Specifically, the second anchoring structure includes bolt holes 13 formed in the T-shaped steel plate 12 and nuts 8. The bolt holes 13 are symmetrically arranged in the T-shaped steel plate 12, and the anchor bolt 6 is fixed to the bolt holes 13 through the nuts 8.

[0058] Specifically, there is one Ω-shaped upper section 4-1 in the Ω-shaped inter-panel connector 4, multiple Ω-shaped middle sections 4-2, and one Ω-shaped lower section 4-3. The complete inter-panel connector is composed of one Ω-shaped upper section 4-1 + several Ω-shaped middle sections 4-2 + one Ω-shaped lower section 4-3; and the bottom sealing steel plate 18 at the bottom of the Ω-shaped lower section 4-3 is used for bottom sealing.

[0059] Specifically, the Ω-shaped upper section 4-1 is fixed to the Ω-shaped middle section 4-2, between the Ω-shaped middle sections 4-2, and between the Ω-shaped middle section 4-2 and the Ω-shaped lower section 4-3 by using the connection method of Ω-shaped section rabbets.

[0060] Specifically, the Ω-shaped section rabbet includes an Ω-shaped upper rabbet 16 and an Ω-shaped lower rabbet 17. The Ω-shaped upper rabbet 16 is a convex mouth, and the Ω-shaped upper rabbet 16 is inserted into the Ω-shaped lower rabbet 17 to realize the fixation of adjacent sections.

[0061] Specifically, the Ω-shaped upper rabbet 16 and the Ω-shaped lower rabbet 17 are arranged in the C-shaped seamless steel pipe 10.

[0062] Specifically, there is one T-shaped upper section 5-1 in the T-shaped inter-panel connector 5, multiple T-shaped middle sections 5-2, and one T-shaped lower section 5-3. The complete inter-panel connector is composed of one T-shaped upper section 5-1 + several T-shaped middle sections 5-2 + one T-shaped lower section 5-3; and the bottom of the T-shaped lower section 5-3 is designed with a closed end.

[0063] Specifically, the T-shaped upper section 5-1 is fixed to the T-shaped middle section 5-2, between the T-shaped middle sections 5-2, and between the T-shaped middle section 5-2 and the T-shaped lower section 5-3 by using the connection method of T-shaped section rabbets.

[0064] Specifically, the T-shaped section rabbet includes a T-shaped upper rabbet 19 and a T-shaped lower rabbet 20. The T-shaped upper rabbet 19 is a convex mouth, and the T-shaped upper rabbet 19 is inserted into the T-shaped lower rabbet 20 to realize the fixation of adjacent sections.

[0065] Specifically, the T-shaped upper rabbet 19 and the T-shaped lower rabbet 20 are arranged in the circular seamless steel pipe 14.

[0066] Specifically, the sections of the Ω-shaped inter-panel connector 4 and the sections of the T-shaped inter-panel connector 5 are fixed by using the method of full penetration welding 21.

[0067] Specifically, the circular seamless steel perforated pipe 14 at the front end of the T-shaped inter-panel connector 5 of the (N + 1)-th precast diaphragm wall 2 is inserted into the C-shaped seamless steel pipe 10 of the Ω-shaped inter-panel connector 4 of the N-th precast diaphragm wall 1 to achieve high-precision guiding and assembly of adjacent precast diaphragm walls.

[0068] Specifically, the circular seamless steel perforated pipe 14 is provided at the front end of the T-shaped inter-panel connector 5, and cement slurry is injected under high pressure through the grouting holes 15 of the circular seamless steel perforated pipe 14 to fill the inter-panel cold joint 3 densely, and finally a cement slurry reinforcement and sealing body 9 is formed.

[0069] An anchoring construction method for a precast diaphragm wall inter-panel steel separable joint, comprising the following steps:

[0070] A. In a steel structure processing factory, process the Ω-shaped inter-panel connector 4 and the T-shaped inter-panel connector 5;

[0071] B. Process the structures for anchoring the Ω-shaped inter-panel connector 4 and the T-shaped inter-panel connector 5;

[0072] C. Process the grooving for segmented assembly;

[0073] D. Carry out rectification and acceptance after processing;

[0074] E. Transport to a precast component processing factory;

[0075] F. Carry out segment splicing and welding of the connectors;

[0076] G. Install the anchor bolts 6;

[0077] H. Lift and fix the complete inter-panel connector and the anchor bolts 6;

[0078] I. Fabricate precast diaphragm walls;

[0079] J. Repeat steps F - I to mass-produce precast diaphragm walls;

[0080] K. Carry out high-precision guiding and assembly of adjacent precast diaphragm walls;

[0081] L. Complete the installation construction of the precast diaphragm walls.

[0082] In step B, the process of processing the structures for anchoring the Ω-shaped inter-panel connector 4 and the T-shaped inter-panel connector 5 is as follows:

[0083] First, weld the reinforcing bar connecting sleeves 7 on the L-shaped steel plates 11 on both sides of the Ω-shaped inter-panel connector 4;

[0084] Then, drill bolt holes 13 on the T-shaped steel plate 12 at the tail of the T-shaped inter-panel connector 5.

[0085] Specifically, in the steel structure processing factory, the Ω-shaped intermediate connectors 4 and T-shaped intermediate connectors 5 are processed. The specific process is as follows:

[0086] First, the Ω-shaped intermediate connector 4 is composed of a C-shaped seamless steel pipe 10 with an inner diameter of 75 mm and a wall thickness of 10 mm, and two L-shaped steel plates 11 with a short side length of 35 mm, a long side length of 75 mm, and a thickness of 10 mm, which are welded together.

[0087] Then, the T-shaped intermediate connector 5 is composed of a T-shaped steel plate 12 with a web length of 119 mm, an end plate width of 140 mm, and a thickness of 12 mm, and a circular seamless steel pipe 14 with an outer diameter of 51 mm and a wall thickness of 10 mm, which are welded together.

[0088] Finally, the sectional lengths of the Ω-shaped intermediate connectors 4 and T-shaped intermediate connectors 5 are controlled within 4 - 6 m.

[0089] Specifically, in step C, the grooving for sectional assembly is processed. The specific process is as follows:

[0090] First, a water jet cutting groove is made on the socket-type upper and lower rabbets provided at the joint of the Ω-shaped intermediate connector 4 and the T-shaped intermediate connector 5 by using a precision lathe.

[0091] Then, the length of the upper rabbet 16 of the Ω-shaped section is 50 mm, the inner diameter is 75 mm, and the wall thickness is 4.5 mm.

[0092] Next, the length of the lower rabbet 17 of the Ω-shaped section is 50 mm, the outer diameter is 86 mm, and the wall thickness is 4.5 mm.

[0093] Next, the length of the upper rabbet 19 of the T-shaped section is 50 mm, the outer diameter is 40 mm, and the wall thickness is 4.5 mm.

[0094] Finally, the length of the lower rabbet 20 of the T-shaped section is 50 mm, the outer diameter is 51 mm, and the wall thickness is 4.5 mm.

[0095] Specifically, in step D, the correction and acceptance after processing are carried out. The specific process is as follows:

[0096] In the steel structure processing factory, the dimensions of the processed intermediate connectors, namely the sections of the Ω-shaped intermediate connectors 4 and T-shaped intermediate connectors 5, are corrected and accepted.

[0097] Specifically, in step E, it is transported to the precast component processing factory. The specific process is as follows:

[0098] First, after successful acceptance, the sectional processed Ω-shaped intermediate connectors 4 and T-shaped intermediate connectors 5 are transported to the precast component processing factory.

[0099] Then, during transportation, the Ω-shaped intermediate connectors 4 and T-shaped intermediate connectors 5 should be fixed well to avoid deformation of the intermediate connectors during transportation.

[0100] Specifically, in step F, segment splicing and welding of the connecting members are carried out, and the specific process is as follows:

[0101] First, on the customized installation bench in the precast component processing factory, segment splicing and welding of the between-panel connecting members are carried out. Penetration welding is used for welding, and the deformation of the between-panel connecting members is strictly controlled during the welding process.

[0102] Then, after welding is completed, the welds on the inner surface of the Ω-shaped between-panel connecting member 4 and the welds on the outer surface of the T-shaped between-panel connecting member 5 are ground.

[0103] Specifically, in step G, the anchor bolts 6 are installed, and the specific process is as follows:

[0104] After the complete Ω-shaped between-panel connecting member 4 and the T-shaped between-panel connecting member 5 are spliced, welded, and ground, the anchor bolts 6 and the corresponding nuts 8 for anchoring the between-panel connecting members are quickly installed on the installation bench.

[0105] Specifically, in step H, the complete between-panel connecting members and the anchor bolts 6 are hoisted and fixed, and the specific process is as follows:

[0106] First, the complete Ω-shaped between-panel connecting member 4, the T-shaped between-panel connecting member 5, and the anchor bolts 6 are hoisted and fixed in the reserved installation groove of the high-precision combined steel mold for the precast diaphragm wall.

[0107] Then, through the reserved installation conditions, high-precision installation of the between-panel connecting members and their anchoring structures is achieved.

[0108] Specifically, in step I, the precast diaphragm wall is fabricated, and the specific process is as follows:

[0109] After the reinforcement cage of the precast diaphragm wall and the relevant embedded parts are installed and fixed, the high-precision combined steel mold is closed, and concrete is poured. After curing to reach the design strength, the mold is removed to complete the fabrication of the precast diaphragm wall.

[0110] Specifically, in step J, steps F - I are repeated to batch-process the precast diaphragm wall, and the specific process is as follows:

[0111] Steps F - I are repeated to carry out large-scale production of the precast diaphragm wall; after the construction site has the conditions for assembling the precast diaphragm wall, the precast diaphragm walls are continuously transported to the construction site without interruption to achieve continuous hoisting and splicing construction of the precast diaphragm wall.

[0112] Specifically, in step K, high-precision guiding assembly of adjacent precast diaphragm walls is carried out, and the specific process is as follows:

[0113] First, high-precision positioning and installation of the first precast diaphragm wall are completed.

[0114] Then, by inserting the circular seamless steel perforated pipe 14 at the front end of the T-shaped inter-panel connector 5 of the second precast diaphragm wall into the C-shaped seamless steel pipe 10 of the Ω-shaped inter-panel connector 4 of the first precast diaphragm wall, the high-precision guiding and assembling of adjacent precast diaphragm walls are realized.

[0115] Specifically, step L completes the installation construction of the precast diaphragm wall, and the specific process is as follows:

[0116] After continuously assembling a certain number of precast diaphragm walls, high-pressure cement slurry is injected into the circular seamless steel perforated pipe 14 to densely fill the inter-panel cold joints 3 between the already installed precast diaphragm walls, and finally a cement slurry reinforcement and sealing body 9 is formed to complete the installation construction of the precast diaphragm wall.

[0117] In the present utility model, the Ω-shaped inter-panel connector and the T-shaped inter-panel connector are provided with circular seamless steel pipes of different diameters. The steel pipes and section steels are all made of steel with a strength of Q355B or above. By utilizing the isotropic characteristics of the circular structure, combined with the high-precision processing and manufacturing of the connectors and the anchoring effect of the anchor bolts; together, they ensure and realize the high-precision guiding and assembling of the precast diaphragm wall, and the inter-panel assembling error can be controlled within 10 mm.

[0118] In the present utility model, the inter-panel connector of the (N + 1)-th precast diaphragm wall is designed as a "T" shape. By using the web of the T-shaped inter-panel connector to vertically span across the inter-panel cold joint, a permanent water stop steel plate is formed between adjacent precast diaphragm walls. After anti-corrosion treatment, it can meet the waterproof and durability requirements of the water stop steel plate at the inter-panel joint during the permanent service life.

[0119] After the precise assembly of the precast diaphragm wall in the present utility model, high-pressure cement slurry is injected into the circular seamless steel perforated pipe at the front end of the T-shaped inter-panel connector to densely fill the gap between the circular seamless steel perforated pipe and the C-shaped seamless steel pipe and the inter-panel cold joint, further strengthening and sealing the inter-panel cold joint, enhancing the inter-panel waterproof and corrosion resistance capabilities; at the same time, it also avoids the direct contact between the steel connectors and the external environment, further ensuring the structural strength, integrity, and durability of the steel connectors during the service life. It solves the waterproof and durability problems of the inter-panel cold joints of the precast diaphragm wall.

[0120] In the present utility model, the Ω-shaped inter-panel connector and the T-shaped inter-panel connector are designed in segmented sections and are provided with socket-type upper and lower rabbets at the joint of the segments. By reducing the design length of the inter-panel connector, the deformation of the connector during processing, transportation, and installation can be effectively reduced; the inter-panel connector realizes high-precision splicing through the socket-type upper and lower rabbets in the precast component factory, and the joint of the inter-panel connector segments is subjected to full penetration welding; through the above measures, high-precision processing and manufacturing of the inter-panel connector can be achieved.

[0121] After the intermediate connectors of the utility model are connected to form a complete component, the ground anchor bolts can be quickly screwed in, and the intermediate connectors and their anchoring structures can be integrally installed and fixed in the reserved conditions of the precast diaphragm wall mold, realizing the high-precision positioning installation of the intermediate connectors and meeting the use requirements of permanent components through the anchoring of the ground anchor bolts.

Claims

1. A prefabricated inter-wall segmented connector, characterized in that: The invention comprises an Ω-shaped inter-width connection piece (4) and a T-shaped inter-width connection piece (5), wherein the Ω-shaped inter-width connection piece (4) is arranged in a groove of the Nth prefabricated underground continuous wall (1), and the opening of the Ω-shaped inter-width connection piece (4) faces the N+1th prefabricated underground continuous wall (2), and the T-shaped inter-width connection piece (5) is arranged in a tenon of the N+1th prefabricated underground continuous wall (2). The Ω-shaped inter-width connection piece (4) and the T-shaped inter-width connection piece (5) are connected to each other, and inter-width cold joints (3) are formed between adjacent prefabricated underground continuous walls and between the Ω-shaped inter-width connection piece (4) and the T-shaped inter-width connection piece (5).

2. The prefabricated inter-wall segmented connector according to claim 1, characterized in that: A fixing anchor bolt (6) is arranged in the groove of the Nth prefabricated underground continuous wall (1), and the Ω-shaped inter-wall connecting member (4) and the anchor bolt (6) are fixed via a first anchoring structure.

3. The prefabricated inter-wall segmented connector according to claim 2, characterized in that: The Ω-shaped inter-width connecting member (4) is of segmented assembly and fixed type, and comprises an Ω-shaped upper segment (4-1) located at the top, an Ω-shaped middle segment (4-2) located at the middle, and an Ω-shaped lower segment (4-3) located at the bottom.

4. The prefabricated inter-wall segmented connector according to claim 3, characterized in that: The Ω-shaped cavities in the Ω-shaped upper segment (4-1), the Ω-shaped middle segment (4-2) and the Ω-shaped lower segment (4-3) are connected, and a blocking steel plate (18) for blocking the lower part of the Ω-shaped cavity is provided in the Ω-shaped lower segment (4-3).

5. The prefabricated inter-wall segmented connector according to claim 1, characterized in that: A fixing anchor bolt (6) is arranged in the tenon of the N+1th prefabricated underground continuous wall (2), and the T-shaped inter-wall connecting piece (5) and the anchor bolt (6) are fixed via a second anchoring structure.

6. The prefabricated inter-wall segmented connector according to claim 5, characterized in that: The T-shaped inter-width connecting piece (5) comprises a circular seamless steel flower tube (14) and a T-shaped steel plate (12); the circular seamless steel flower tube (14) cooperates with the Ω-shaped cavity of the Ω-shaped inter-width connecting piece (4); and the outer wall of the circular seamless steel flower tube (14) is connected to the T-shaped steel plate (12).

7. The prefabricated inter-wall segmented connector according to claim 6, characterized in that: The T-shaped inter-width connecting member (5) is of segmented assembly and fixing type, and comprises a T-shaped upper segment (5-1) located at the top, a T-shaped middle segment (5-2) located at the middle, and a T-shaped lower segment (5-3) located at the bottom.

8. The prefabricated inter-wall segmented connector according to claim 7, characterized in that: The lower end of the T-shaped lower segment (5-3) forms a closing opening with a reduced diameter.

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