Underground diaphragm wall structure

Abstract

The utility model relates to and discloses an underground diaphragm wall structure. Relates to the technical field of building construction. The structure specifically comprises a wall pit transversely dug underground, reinforcement cages arranged in the wall pit, a concrete layer poured in the wall pit and a penetrating area allowing a shield tunneling machine to longitudinally penetrate through the wall pit, and the concrete layer is filled between the reinforcement cages and the outer sides of the reinforcement cages; the reinforcement cage comprises a reinforcement frame, a glass fiber rib frame and a connecting piece for connecting the reinforcement frame and the glass fiber rib frame. The steel reinforcement cage comprises the steel reinforcement frame and the glass fiber rib frame which are separated from each other, and the position of the penetrating area reserved on the wall body is partially or completely overlapped with the position of the glass fiber rib frame, so that the glass fiber rib frame is cut in the process of cutting the wall body at the position of the penetrating area by a shield machine; therefore, the shield machine can quickly penetrate through the underground diaphragm wall, construction efficiency is improved, construction accidents can be prevented, damage to a cutter of the shield machine can be reduced, and construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an underground continuous wall structure. Background Art

[0002] The shield method is a fully mechanized construction method in the dark excavation construction. It pushes the shield machine into the ground, supports the surrounding rock with the shield shell and segments to prevent collapse into the tunnel, and excavates the soil in front of the excavation face with a cutting device, transports it out of the hole with an excavation machine, pressurizes it at the rear with a jack, and assembles precast concrete segments to form a mechanized construction method of the tunnel structure. Underground continuous walls are required in shield tunnels, and combined steel underground connecting walls can be used as temporary retaining walls.

[0003] The underground continuous wall is a foundation project. During construction, a trenching machine is used on the ground to dig a long and narrow deep trench along the peripheral axis of the deep excavation project under the condition of mud wall protection. After the trench is cleared, a steel cage is hung in the trench, and then underwater concrete is poured using the conduit method to build a unit trench section. This is done section by section to build a continuous reinforced concrete wall underground as a water interception, anti-seepage, load-bearing and water-retaining structure.

[0004] When the existing combined steel underground connecting wall is used in a shield tunnel, the speed at which the cutting device of the shield machine penetrates the underground continuous wall is slow. On the one hand, it will reduce the construction efficiency and thus affect the construction progress; on the other hand, it will cause the cutting device of the shield machine to penetrate the underground continuous wall for a longer time. During this process, the vibration generated may cause ground landslides and the collapse of ground buildings, thereby causing construction accidents. Utility Model Content

[0005] The purpose of the utility model is to provide an underground continuous wall structure to address the deficiencies of the above-mentioned prior art, which can enable the shield machine to quickly penetrate the underground continuous wall during shield construction, thereby improving construction efficiency and preventing construction accidents.

[0006] The utility model proposes an underground continuous wall structure, comprising a wall pit excavated horizontally on the ground, a support cage arranged in the wall pit, a concrete layer poured in the wall pit, and a penetration area for a shield machine to longitudinally penetrate the wall pit, the concrete layer is filled between the support cages and on the outside of the support cage; the support cage comprises a steel bar frame, a glass fiber bar frame, and a connecting piece connecting the steel bar frame and the glass fiber bar frame, and the penetration area partially or completely overlaps with the position of the glass fiber bar frame.

[0007] Furthermore, the steel bar frame includes at least four steel bar columns distributed in an array, and a plurality of steel bar frames, wherein the plurality of steel bar frames connect the at least four steel bar columns so that the at least four steel bar columns and the plurality of steel bar frames form a square frame.

[0008] Furthermore, the fiberglass reinforcement frame includes at least four fiberglass reinforcement columns distributed in an array, and a plurality of fiberglass reinforcement frames, wherein the plurality of fiberglass reinforcement frames connect at least four of the fiberglass reinforcement columns to form a square frame with the at least four fiberglass reinforcement columns and the plurality of fiberglass reinforcement frames.

[0009] Furthermore, the connecting member includes a first sleeve connected to the end of the steel reinforcement frame, and a second sleeve connected to the end of the glass fiber reinforcement frame, and the first sleeve and the second sleeve are an integrated structure.

[0010] Furthermore, a threaded portion is provided at the end of the steel frame, and an inner wall of the first sleeve is provided with an internal thread, and the internal thread cooperates with the threaded portion to fix the first sleeve on the end of the steel frame.

[0011] Furthermore, the steel frame is made of ribbed steel bars, and the inner wall of the first sleeve is provided with internal threads, which cooperate with the ribs on the outer periphery of the end of the steel frame to fix the first sleeve on the end of the steel frame.

[0012] Furthermore, an insertion limit portion is provided at the end of the glass fiber reinforcement frame, and a sleeve limit portion is provided on the second sleeve, and the sleeve limit portion cooperates with the insertion limit portion to fix the second sleeve on the end of the reinforcement frame.

[0013] Furthermore, the cross-sectional area of ​​the plug-in limiting portion is larger than the cross-sectional area of ​​the end portion of the glass fiber reinforcement frame, and the opening end of the second sleeve gradually shrinks inward to form a sleeve limiting portion that cooperates with the plug-in limiting portion.

[0014] Furthermore, the insertion limiting portion is an upset section formed by heat treatment at the end of the glass fiber reinforcement frame.

[0015] Furthermore, the underground continuous wall structure also includes a sealing soil layer arranged on the top of the wall pit, and the sealing soil layer is used to close the top opening of the wall pit.

[0016] The utility model provides an underground continuous wall structure with the following gain effects:

[0017] (1) The support cage of the underground continuous wall structure is a segmented structure, including a separate steel bar frame and a glass fiber reinforcement frame. The penetration area reserved on the wall partially or completely overlaps with the location of the glass fiber reinforcement frame, so that the shield machine can cut the glass fiber reinforcement frame during the process of cutting the wall at the penetration area, so that the shield machine can quickly penetrate the underground continuous wall, which not only improves construction efficiency, but also prevents construction accidents. At the same time, it can also reduce the damage of the shield machine tool and reduce construction costs;

[0018] (2) The connecting member of the local underground continuous wall structure includes a first sleeve and a second sleeve, wherein the first sleeve is connected to the end of the steel bar frame, and the second sleeve is connected to the end of the glass fiber reinforcement frame. Since the first sleeve and the second sleeve are an integrated structure, the end of the steel bar frame is fixedly connected to the end of the glass fiber reinforcement frame through the first sleeve and the second sleeve, so that the steel bar frame and the glass fiber reinforcement frame form an integral support cage;

[0019] (3) The reinforcement frame of the underground continuous wall structure is made of ribbed steel bars, that is, the reinforcement column is provided with ribs, and an internal thread that can cooperate with the ribs on the reinforcement column is provided on the inner wall of the first sleeve, so that the internal thread on the inner wall of the first sleeve cooperates with the ribs on the reinforcement column to achieve the connection between the first sleeve and the end of the reinforcement frame, and ensure the stability of the connection between the first sleeve and the end of the reinforcement frame;

[0020] (4) The end of the glass fiber reinforcement column of the local underground continuous wall structure is provided with a plug-in limit portion, and the second sleeve is provided with a sleeve limit portion. When the second sleeve is sleeved on the end of the glass fiber reinforcement column, the sleeve limit portion cooperates with the plug-in limit portion to achieve a fixed connection between the second sleeve and the end of the glass fiber reinforcement column, thereby achieving a fixed connection between the second sleeve and the end of the glass fiber reinforcement frame;

[0021] (5) The plug-in limiting portion of the local underground continuous wall structure is an upset section formed by heat treatment at the end of the glass fiber reinforcement column. The sleeve limiting portion formed by the opening end of the second sleeve gradually shrinking inward limits the upset section at the end of the glass fiber reinforcement column, thereby realizing a fixed connection between the second sleeve and the end of the glass fiber reinforcement column;

[0022] (6) The underground continuous wall structure also includes a covering soil layer. After the concrete layer is poured in the wall pit, the covering soil layer is laid on the top of the wall pit so that the covering soil layer covers the concrete layer, thereby closing the top opening of the wall pit through the covering soil layer. The sum of the thickness of the concrete layer poured in the wall pit and the thickness of the covering soil layer is equal to the depth of the wall pit, so that the ground on which the underground continuous wall structure is set is flush with the original ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0024] Figure 1 It is a structural schematic diagram of an underground continuous wall structure according to an embodiment of the utility model;

[0025] Figure 2 A schematic structural diagram of a reinforcement frame of an underground continuous wall structure according to an embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of an underground continuous wall structure of an embodiment of the utility model, in which a connecting piece is fixedly installed on a glass fiber reinforcement frame;

[0027] Figure 4 This is a schematic diagram of the partial structure of a connecting piece of an underground continuous wall structure connecting a steel bar column and a glass fiber reinforced column according to an embodiment of the utility model.

[0028] In the figure: 1. wall pit; 2. steel bar frame; 21. steel bar column; 22. steel bar frame; 3. glass fiber reinforcement frame; 31. glass fiber reinforcement column; 311. plug-in limit part; 32. glass fiber reinforcement frame; 4. connecting piece; 41. first sleeve; 411. internal thread; 42. second sleeve; 421. sleeve limit part; 5. concrete layer; 6. penetration area; 7. sealing soil layer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] See also Figure 1 to Figure 4 An underground continuous wall structure of an embodiment of the utility model includes a wall pit 1 dug horizontally on the ground, a support cage arranged in the wall pit 1, a concrete layer 5 poured in the wall pit 1, and a penetration area 6 for a shield machine to longitudinally penetrate the wall pit 1, and the concrete layer 5 is filled between the support cages and on the outside of the support cage; the support cage includes a steel frame 2, a glass fiber reinforcement frame 3, and a connecting piece 4 connecting the steel frame 2 and the glass fiber reinforcement frame 3, and the penetration area 6 partially or completely overlaps with the position where the glass fiber reinforcement frame 3 is located.

[0031] In the present application, the underground continuous wall structure includes a wall pit 1, a support cage, a concrete layer 5 and a penetration area 6. The wall pit 1 is a deep groove distributed in the horizontal direction excavated on the ground by a trenching machine. After the excavation of the wall pit 1 is completed, the support cage is suspended in the wall pit 1, and then the concrete layer 5 is poured in the wall pit 1, so that the concrete layer 5 is filled between the support cages and the outside of the support cages, so that the wall of the underground continuous wall structure is formed through the combination of the concrete layer 5 and the support cage. When used in a shield tunnel, the local underground continuous wall structure also includes a penetration area 6 reserved on the wall, so that when the shield machine passes through the underground continuous wall structure, the wall is cut at the location of the penetration area 6, thereby penetrating the wall pit 1 in the longitudinal direction.

[0032] In the present application, the support cage is a segmented structure, including a separate steel bar frame 2 and a glass fiber reinforcement frame 3, and a connector 4 that connects the steel bar frame 2 and the glass fiber reinforcement frame 3 to form an integral support cage. The steel bar frame 2 is made of ordinary steel bars, and the glass fiber reinforcement frame 3 is made of glass fiber reinforcement. Glass fiber reinforcement is a composite material made of glass fiber and synthetic resin, which is basically similar to steel bars in performance, has good adhesion to concrete, and has high tensile strength.

[0033] Since the glass fiber reinforcement has a low shear strength, it can be easily cut directly by the shield machine without causing abnormal tool damage. Therefore, in the present application, the penetration area 6 reserved on the wall is partially or completely overlapped with the position of the glass fiber reinforcement frame 3, so that the shield machine can cut the glass fiber reinforcement frame 3 in the process of cutting the wall at the penetration area 6. Compared with the steel frame 2, the glass fiber reinforcement frame 3 has a lower shear strength, so that the shield machine can quickly penetrate the underground continuous wall, which not only improves the construction efficiency, but also prevents the occurrence of construction accidents, and at the same time reduces the damage to the shield machine tool and reduces the construction cost.

[0034] It can be foreseen that: in the present application, the reason why the segmented support cage is configured to include a steel frame 2 and a glass fiber steel frame 3 instead of using only the steel frame 2 is because the shear strength of the steel bar is relatively strong. When the shield machine cuts the wall, the cutting speed of the steel frame 2 is relatively slow, thereby affecting the speed at which the shield machine penetrates the underground continuous wall, which not only reduces the construction efficiency, but also easily causes construction accidents.

[0035] In the present application, the segmented support cages do not all use glass fiber reinforcement frames 3 because compared with ordinary steel bars, glass fiber reinforcements are more expensive to produce and thus increase the cost of construction. Therefore, in the present application, glass fiber reinforcement frames 3 are only provided at the locations of the penetration areas 6 reserved on the wall for the shield machine to penetrate, so that the shield machine can quickly penetrate the underground continuous wall, which not only improves the efficiency of construction but also reduces the cost of construction.

[0036] In this embodiment, the steel bar frame 2 includes at least four steel bar columns 21 distributed in an array, and a plurality of steel bar frames 22, and the plurality of steel bar frames 22 connect the at least four steel bar columns 21, so that the at least four steel bar columns 21 and the plurality of steel bar frames 22 form a square frame. In the present application, the steel bar frame 2 includes at least four steel bar columns 21 and a plurality of steel bar frames 22, and the at least four steel bar columns 21 are distributed in an array, and the plurality of steel bar frames 22 are between the at least four steel bar columns 21, connecting the at least four steel bar columns 21, so that the at least four steel bar columns 21 and the plurality of steel bar frames 22 are combined into a square steel bar frame 2, so that when the steel bar frame 2 is placed in the wall pit 1, it can cooperate with the square wall pit 1.

[0037] Specifically, in actual implementation, multiple steel frames 22 are fixedly connected between at least four steel columns 21 and at least four steel columns 21 by wire tying or welding, thereby making the steel frame 2 more integrated and further enhancing the stability of the steel frame 2 structure.

[0038] In this embodiment, the glass fiber reinforcement frame 3 includes at least four glass fiber reinforcement columns 31 distributed in an array, and a plurality of glass fiber reinforcement frames 32, and the plurality of glass fiber reinforcement frames 32 connect the at least four glass fiber reinforcement columns 31, so that the at least four glass fiber reinforcement columns 31 and the plurality of glass fiber reinforcement frames 32 form a square frame. In the present application, the glass fiber reinforcement frame 3 also includes at least four glass fiber reinforcement columns 31 and a plurality of glass fiber reinforcement frames 32, and the at least four glass fiber reinforcement columns 31 are distributed in an array, and the plurality of glass fiber reinforcement frames 32 are between the at least four glass fiber reinforcement columns 31, connecting the at least four glass fiber reinforcement columns 31, so that the at least four glass fiber reinforcement columns 31 and the plurality of glass fiber reinforcement frames 32 are combined into a square glass fiber reinforcement frame 3, so that when the glass fiber reinforcement frame 3 is placed in the wall pit 1, it can cooperate with the square wall pit 1.

[0039] Specifically, in actual implementation, since glass fiber itself does not have the properties of electrical conductivity and thermal conductivity, the traditional welding method is not suitable for welding the glass fiber reinforcement frame 3. Therefore, in the present application, multiple glass fiber reinforcement frames 32 are fixedly connected to at least four glass fiber reinforcement columns 31 by steel wire binding or U-bolt connection, thereby making the integrity of the glass fiber reinforcement frame 3 stronger and further enhancing the stability of the glass fiber reinforcement frame 3 structure.

[0040] In this embodiment, the connector 4 includes a first sleeve 41 connected to the end of the steel frame 2, and a second sleeve 42 connected to the end of the glass fiber reinforcement frame 3, and the first sleeve 41 and the second sleeve 42 are an integral structure. In the present application, the connector 4 includes a first sleeve 41 and a second sleeve 42, the first sleeve 41 is connected to the end of the steel frame 2, and the second sleeve 42 is connected to the end of the glass fiber reinforcement frame 3. Since the first sleeve 41 and the second sleeve 42 are an integral structure, the end of the steel frame 2 is fixedly connected to the end of the glass fiber reinforcement frame 3 through the connector 4, so that the steel frame 2 and the glass fiber reinforcement frame 3 form an integral support cage.

[0041] In the previous embodiment, it is mentioned that the steel bar frame 2 includes at least four steel bar columns 21 and a plurality of steel bar frames 22 connecting the at least four steel bar columns 21; the glass fiber bar frame 3 includes at least four glass fiber bar columns 31 and a plurality of glass fiber bar frames 32 connecting the at least four glass fiber bar columns 31. Therefore, it can be foreseen that: in the present application, at least four connecting members 4 are provided, and the ends of the at least four steel bar columns 21 are connected to the at least four glass fiber bar columns 31 respectively through the at least four connecting members 4, that is, the first sleeve 41 is connected to the end of the steel bar column 21, and the second sleeve 42 is connected to the end of the glass fiber bar column 31, so that the end of the steel bar frame 2 is fixedly connected to the end of the glass fiber bar frame 3.

[0042] In this embodiment, a threaded portion is provided at the end of the steel frame 2, and an internal thread 411 is provided on the inner wall of the first sleeve 41. The internal thread 411 cooperates with the threaded portion to fix the first sleeve 41 on the end of the steel frame 2. In this application, a threaded portion is provided at the end of the steel frame 2, that is, an external thread is machined at the end of the steel column 21, and an internal thread 411 is provided on the inner wall of the first sleeve 41. The internal thread 411 on the inner wall of the first sleeve 41 cooperates with the external thread at the end of the steel column 21, thereby realizing the connection between the first sleeve 41 and the end of the steel frame 2, and making the stability of the connection between the first sleeve 41 and the end of the steel frame 2 stronger, thereby improving the stability of the support cage structure.

[0043] In another embodiment, the steel frame 2 is made of ribbed steel bars, that is, the steel column 21 has ribs, and an internal thread 411 that can cooperate with the ribs on the steel column 21 is provided on the inner wall of the first sleeve 41. Thereby, the connection between the first sleeve 41 and the end of the steel frame 2 is achieved through the cooperation between the internal thread 411 on the inner wall of the first sleeve 41 and the ribs on the steel column 21, and the stability of the connection between the first sleeve 41 and the end of the steel frame 2 is ensured.

[0044] Compared with the previous embodiment, this embodiment reduces the process of turning external threads at the ends of the steel bar columns 21. In the previous embodiment, it is mentioned that the steel bar frame 2 includes at least four steel bar columns 21, and the glass fiber reinforcement frame 3 includes at least four glass fiber reinforcement columns 31. The ends of at least four steel bar columns 21 are connected to at least four glass fiber reinforcement columns 31 through at least four connectors 4, respectively, to achieve a fixed connection between the ends of the steel bar frame 2 and the ends of the glass fiber reinforcement frame 3. Therefore, in the specific implementation, this embodiment can reduce the process of turning external threads at the ends of multiple steel bar columns 21, thereby greatly improving the construction efficiency and ensuring the construction progress.

[0045] In this embodiment, the end of the glass fiber reinforcement frame 3 is provided with a plug-in limit portion 311, that is, the end of the glass fiber reinforcement column 31 is provided with a plug-in limit portion 311, and the second sleeve 42 is provided with a sleeve limit portion 421. When the second sleeve 42 is sleeved on the end of the glass fiber reinforcement column 31, the end of the glass fiber reinforcement column 31 is plugged with the inner cylinder of the second sleeve 42, and the sleeve limit portion 421 of the inner cylinder of the second sleeve 42 cooperates with the plug-in limit portion 311 at the end of the glass fiber reinforcement column 31, so that the second sleeve 42 can be fixed to the end of the glass fiber reinforcement column 31, thereby achieving a fixed connection between the second sleeve 42 and the end of the glass fiber reinforcement frame 3.

[0046] Specifically, in this embodiment, the cross-sectional area of ​​the plug-in limit portion 311 is greater than the cross-sectional area of ​​the end of the glass fiber reinforcement frame 3, that is, the cross-sectional area of ​​the plug-in limit portion 311 is greater than the cross-sectional area of ​​the main body of the glass fiber reinforcement column 31. The opening end of the second sleeve 42 gradually shrinks inward, so that the sleeve limit portion 421 is formed in the inner cylinder of the second sleeve 42.

[0047] When the insertion limit portion 311 at the end of the glass fiber reinforcement column 31 is inserted into the inner tube of the second sleeve 42 through the open end of the second sleeve 42, the sleeve limit portion 421 formed by the gradually inwardly contracting open end of the second sleeve 42 limits the insertion limit portion 311 at the end of the glass fiber reinforcement column 31, thereby fixing the second sleeve 42 to the end of the glass fiber reinforcement column 31, thereby realizing the fixed connection between the second sleeve 42 and the end of the glass fiber reinforcement frame 3.

[0048] Specifically, in this embodiment, the plug-in limit portion 311 is an upset section formed by heat treatment at the end of the glass fiber reinforcement frame 3, that is, the plug-in limit portion 311 is an upset section formed by heat treatment at the end of the glass fiber reinforcement column 31. In the production process of glass fiber reinforcement, the glass fiber reinforcement is usually heated before solidification to achieve a better solidification effect, and the process requires controlling the heating temperature and heating time to achieve the best effect.

[0049] Since the elastic modulus of the glass fiber reinforcement is reduced after the heat treatment, when the glass fiber reinforcement column 31 is produced and manufactured, after the glass fiber reinforcement column 31 is heated, an upsetting section with a cross-sectional area larger than the main body of the glass fiber reinforcement column 31 can be formed at the end of the glass fiber reinforcement column 31 by upsetting. The upsetting section is the plug-in limit portion 311.

[0050] Since the end of the glass fiber reinforcement column 31 passes through the open end of the second sleeve 42 and is inserted into the inner cylinder of the second sleeve 42, the opening end of the second sleeve 42 gradually shrinks inward to form a sleeve limit portion 421 to limit the insertion limit portion 311 at the end of the glass fiber reinforcement column 31. Therefore, it can be foreseen that: the maximum cross-sectional area of ​​the inner cylinder of the second sleeve 42 is greater than or equal to the cross-sectional area of ​​the insertion limit portion 311, and the minimum cross-sectional area is less than the cross-sectional area of ​​the insertion limit portion 311.

[0051] Since the minimum cross-sectional area of ​​the inner cylinder of the second sleeve 42 is located at the open end of the second sleeve 42, the insertion limiter 311 at the end of the glass fiber rib column 31 cannot pass through the open end of the second sleeve 42 and be inserted into the inner cylinder of the second sleeve 42. Since the heating process of the glass fiber rib is performed before the glass fiber rib is solidified, when the glass fiber rib column 31 is produced, after the glass fiber rib column 31 is heated, an upset section is first formed at the end of the glass fiber rib column 31 by upsetting.

[0052] Since the glass fiber reinforcement column 31 has not yet solidified, under the action of external force, the upset section at the end of the glass fiber reinforcement column 31 can be inserted into the second sleeve 42 whose open end cross-sectional area is smaller than that of the upset section. After the glass fiber reinforcement column 31 is cooled and solidified, the sleeve limiting portion 421 formed by the gradually inwardly contracted open end of the second sleeve 42 limits the upset section at the end of the glass fiber reinforcement column 31, thereby realizing the fixed connection between the second sleeve 42 and the end of the glass fiber reinforcement column 31, that is, the fixed connection between the second sleeve 42 and the end of the glass fiber reinforcement column 31 is completed during the production of the glass fiber reinforcement column 31.

[0053] As mentioned above, the first sleeve 41 and the second sleeve 42 are an integrated structure. Specifically, the first sleeve 41 and the second sleeve 42 are made of stainless steel material in an integrated manner, thereby ensuring the structural strength of the connector 4 and improving the stability of the support cage structure. In the above embodiment, the fixed connection between the second sleeve 42 and the end of the glass fiber rib column 31 is completed during the production of the glass fiber rib column 31. Therefore, the connector 4 is fixedly installed on the end of the glass fiber rib column 31 after the glass fiber rib column 31 leaves the factory.

[0054] As mentioned above, the fixed connection between the first sleeve 41 and the end of the steel frame 2 is achieved by screwing the internal thread 411 of the first sleeve 41 with the external thread or rib at the end of the steel column 21, and the connecting piece 4 is fixedly installed on the end of the glass fiber reinforcement column 31 after the glass fiber reinforcement column 31 leaves the factory.

[0055] Therefore, before manufacturing the steel frame 2, the multiple steel bars 21 are first screwed to the multiple first sleeves 41 fixed on the multiple glass fiber bars 31 by screwing, so as to complete the fixed connection between the multiple steel bars 21 and the multiple connecting parts 4, and then the multiple steel frames 22 are connected to the multiple steel bars 21 to complete the manufacturing of the steel frame 2.

[0056] This prevents the steel frame 2 from being too heavy as a whole after it is manufactured, and the multiple steel bars 21 in the steel frame 2 being difficult to screw with the multiple first sleeves 41, which makes it difficult to connect the steel frame 2 with the multiple connectors 4 fixedly installed at the ends of the glass fiber bars 31, thereby increasing the difficulty of construction.

[0057] In this embodiment, the underground continuous wall structure further includes a sealing layer 7. After the concrete layer 5 is poured in the wall pit 1, the sealing layer 7 is laid on the top of the wall pit 1 so that the sealing layer 7 covers the concrete layer 5, thereby closing the top opening of the wall pit 1 through the sealing layer 7. It can be foreseen that the sum of the thickness of the concrete layer 5 poured in the wall pit 1 and the thickness of the sealing layer 7 is equal to the depth of the wall pit 1, so that the ground where the underground continuous wall structure is set is flush with the original ground.

[0058] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An underground continuous wall structure, characterized in that: The invention comprises a wall pit (1) excavated horizontally on the ground, a support cage arranged in the wall pit (1), a concrete layer (5) poured in the wall pit (1), and a penetration area (6) for a shield machine to longitudinally penetrate the wall pit (1), wherein the concrete layer (5) is filled between the support cages and outside the support cages; the support cage comprises a steel bar frame (2), a glass fiber reinforcement frame (3), and a connecting piece (4) connecting the steel bar frame (2) and the glass fiber reinforcement frame (3), wherein the penetration area (6) partially or completely overlaps with the position of the glass fiber reinforcement frame (3).

2. An underground continuous wall structure as claimed in claim 1, characterized in that: The steel bar frame (2) comprises at least four steel bar columns (21) distributed in an array, and a plurality of steel bar frames (22), wherein the plurality of steel bar frames (22) connect the at least four steel bar columns (21) so that the at least four steel bar columns (21) and the plurality of steel bar frames (22) form a square frame.

3. An underground continuous wall structure as claimed in claim 1, characterized in that: The glass fiber reinforcement frame (3) comprises at least four glass fiber reinforcement columns (31) distributed in an array, and a plurality of glass fiber reinforcement frames (32), wherein the plurality of glass fiber reinforcement frames (32) connect the at least four glass fiber reinforcement columns (31) so that the at least four glass fiber reinforcement columns (31) and the plurality of glass fiber reinforcement frames (32) form a square frame.

4. An underground continuous wall structure as claimed in claim 1, characterized in that: The connecting member (4) comprises a first sleeve (41) connected to the end of the steel reinforcement frame (2), and a second sleeve (42) connected to the end of the glass fiber reinforcement frame (3), wherein the first sleeve (41) and the second sleeve (42) are an integrated structure.

5. An underground continuous wall structure as claimed in claim 4, characterized in that: The end of the steel bar frame (2) is provided with a threaded portion, and the inner wall of the first sleeve (41) is provided with an internal thread (411), and the internal thread (411) cooperates with the threaded portion to fix the first sleeve (41) on the end of the steel bar frame (2).

6. An underground continuous wall structure as claimed in claim 4, characterized in that: The steel bar frame (2) is made of ribbed steel bars, and the inner wall of the first sleeve (41) is provided with an internal thread (411), and the internal thread (411) cooperates with the ribs on the outer periphery of the end of the steel bar frame (2) to fix the first sleeve (41) on the end of the steel bar frame (2).

7. An underground continuous wall structure as claimed in claim 4, characterized in that: The end of the glass fiber reinforcement frame (3) is provided with a plug-in limiting portion (311), and the second sleeve (42) is provided with a sleeve limiting portion (421), and the sleeve limiting portion (421) cooperates with the plug-in limiting portion (311) to fix the second sleeve (42) on the end of the reinforcement frame (2).

8. An underground continuous wall structure as claimed in claim 7, characterized in that: The cross-sectional area of ​​the plug-in limiting portion (311) is larger than the cross-sectional area of ​​the end of the glass fiber reinforcement frame (3), and the opening end of the second sleeve (42) gradually shrinks inwards to form a sleeve limiting portion (421) that cooperates with the plug-in limiting portion (311).

9. An underground continuous wall structure as claimed in claim 8, characterized in that: The insertion limiting portion (311) is an upset section formed by heat treatment at the end of the glass fiber reinforcement frame (3).

10. An underground continuous wall structure as claimed in claim 1, characterized in that: The underground continuous wall structure further comprises a sealing layer (7) arranged at the top of the wall pit (1), wherein the sealing layer (7) is used to close the top opening of the wall pit (1).

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