Underground diaphragm wall joint structure and construction method

Abstract

The invention discloses an underground diaphragm wall joint structure and a construction method. The underground diaphragm wall joint structure comprises a reinforcement cage; the first clamping part is arranged at one end of the reinforcement cage and comprises a first clamping section and a second clamping section which are sequentially arranged in the width direction of the reinforcement cage; the second clamping part is correspondingly arranged at the end, away from the first clamping part, of the reinforcement cage and comprises a third clamping section and a fourth clamping section; when the first clamping part and the second clamping part on the adjacent reinforcement cages are connected, the first clamping section and the third clamping section form a first fixed waterproof structure, the second clamping section and the fourth clamping section form a second fixed waterproof structure, and a containing cavity is formed between the first fixed waterproof structure and the second fixed waterproof structure; and the water stop material is arranged in the containing cavity to form a cross-section layer, so that the containing cavity part serves as a reinforced waterproof structure. The underground diaphragm wall joint structure can improve the waterproof and anti-seepage effect of the joint of the underground diaphragm wall, the joint is prevented from deforming during construction, and meanwhile the connection strength of the joint is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an underground continuous wall joint structure and a construction method. Background Art

[0002] The underground continuous wall technology originated in Europe and was originally developed to solve the anti-seepage problem of water conservancy projects such as dams. With the continuous advancement of construction technology, underground continuous walls have gradually been used in construction projects and municipal engineering, becoming an important basic engineering structure. After decades of development, the technology of underground continuous walls has become quite mature and has been widely used around the world. Among them, the underground continuous wall joint is a key part of the underground continuous wall construction, and its construction quality will directly affect the quality of the underground continuous wall anti-seepage. At present, the commonly used underground continuous wall joints are circular lock pipe joints and I-beam joints. Among them, the circular lock pipe process is not easy to tighten between the lock pipe and the end of the slot section, resulting in loose joints and potential water leakage. The I-beam joint process is prone to deformation of the I-beam, which creates a gap between the I-beam and the slot section, resulting in loose concrete pouring at the joint.

[0003] In view of this, it is necessary to design an underground continuous wall joint structure and construction method to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an underground continuous wall joint structure and construction method which can improve the waterproof and anti-seepage effect of underground continuous wall joints, avoid deformation of the joints during construction, and ensure the connection strength of the joints.

[0005] To achieve the above-mentioned object of the invention, the present invention provides an underground continuous wall joint structure, comprising: Steel cage; A first clamping portion is arranged at one end of the steel cage, comprising a clamping section 1 and a clamping section 2 which are arranged in sequence along the width direction of the steel cage; The second clamping portion is correspondingly arranged at one end of the steel cage away from the first clamping portion, and includes a clamping section three and a clamping section four; When the first clamping portion and the second clamping portion on adjacent steel cages are connected, the clamping segment 1 and the clamping segment 3 form a first fixed waterproof structure, the clamping segment 2 and the clamping segment 4 form a second fixed waterproof structure, and a cavity is formed between the first fixed waterproof structure and the second fixed waterproof structure; and The water-stopping material is arranged in the cavity to form a cut-off layer, so that the cavity portion serves as a reinforced waterproof structure.

[0006] As a further improvement of the present invention, the clamping section is a frame structure with an opening at one end, so that the corresponding two clamping sections form a fixed waterproof structure with a certain bypass path.

[0007] As a further improvement of the present invention, the opening of the frame structure is arranged along the width direction of the steel cage.

[0008] As a further improvement of the present invention, the clamping section is connected to the steel cage via a plate body, and the width of the plate body is greater than the width of the steel cage.

[0009] As a further improvement of the present invention, both ends of the cavity are provided with limiting grooves for facilitating the installation of water-stopping materials.

[0010] As a further improvement of the present invention, the water-stopping material is fixed in the cavity by a waterproof adhesive.

[0011] As a further improvement of the present invention, the water-stopping material is a water-stopping metal coil or a water-stopping steel plate.

[0012] As a further improvement of the present invention, a water-swellable water-stop strip is also provided in the cavity.

[0013] As a further improvement of the present invention, the cut-off layer formed by the water-stop material is parallel to the length direction of the steel cage.

[0014] The present invention also provides a construction method of an underground continuous wall joint structure, comprising the following steps: S1, respectively arranging the first clamping part and the second clamping part at two ends of the steel cage; S2, hoisting and lowering the steel cage into the underground continuous wall foundation trench, and then hoisting and lowering another adjacent steel cage, so that the first clamping portion and the second clamping portion on the adjacent steel cage are connected, so that the clamping section 1 and the clamping section 3 form a first fixed waterproof structure, and the clamping section 2 and the clamping section 4 form a second fixed waterproof structure; S3. Install and fix the water-stopping material in the cavity to form a cut-off layer, so that the cavity part serves as a reinforced waterproof structure.

[0015] The beneficial effects of the present invention are: 1. The present invention performs a two-stage clamping arrangement along the width direction of the steel cage and forms a cavity between the two clamping parts. The first clamping part and the second clamping part can be used to increase the flow path to form a bypass flow to achieve an anti-leakage effect, while also improving the connection density at the underground continuous wall joint to ensure the connection tightness of adjacent steel cages. At the same time, by using a water-stopping material to set a cutoff layer in the cavity, the cavity part can form a reinforced waterproof structure, and then the three-layer waterproof design of the first clamping part, the water-stopping material and the second clamping part can be used to effectively improve the anti-leakage effect.

[0016] 2. Compared with the I-beam joint structure, the segmented clamping design of the present invention can avoid deformation of the joint during construction while improving the connection strength and waterproof performance of the underground continuous wall joint.

[0017] 3. After the adjacent underground continuous walls are fixed by the clamping part, the present invention places the water-stopping material in the cavity to form a cut-off layer, which can perform multiple waterproof defenses on the nodes of the underground continuous walls and fully consolidate the waterproof and anti-seepage strength of the joint positions. Through this method, the leakage rate of the underground structure can be greatly reduced, and the secondary waterproof and anti-seepage construction of the underground structure can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the underground continuous wall joint structure.

[0019] Figure 2 Schematic diagram of the use of underground continuous wall joint structure.

[0020] Figure 3 It is a structural schematic diagram of the first clamping part.

[0021] Figure 4 It is a schematic structural diagram of the second clamping part.

[0022] Figure 5 This is a schematic diagram of the structure in which the water-stopping material is not installed in the cavity part.

[0023] Figure 6 Schematic diagram of the structure for installing water-stopping materials in the cavity part.

[0024] Figure 7 This is a construction diagram of the underground continuous wall joint structure.

[0025] Reference numerals 10. Steel cage; 21. Snap-in section 1; 22. Snap-in section 2; 31. Snap-in section 3; 32. Snap-in section 4; 40. Plate; 50. Cavity; 51. Limiting groove; 60. Water-stop material; 70. Underground continuous wall. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0028] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes 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 apparatus.

[0029] like Figure 1-Figure 4 and Figure 7 As shown, the present invention provides an underground continuous wall joint structure, comprising: Steel cage 10; The first clamping portion is arranged at one end of the steel cage 10, and includes a clamping section 1 21 and a clamping section 22 arranged in sequence along the width direction of the steel cage 10; The second clamping portion is correspondingly arranged at one end of the steel cage 10 away from the first clamping portion, and includes a clamping section 31 and a clamping section 4 32; When the first clamping portion and the second clamping portion on the adjacent steel cages 10 are connected, the clamping section 1 21 and the clamping section 3 31 form a first fixed waterproof structure, the clamping section 22 and the clamping section 4 32 form a second fixed waterproof structure, and a cavity 50 is formed between the first fixed waterproof structure and the second fixed waterproof structure; and The water-stopping material 60 is disposed in the cavity 50 to form a cut-off layer, so that the cavity 50 part serves as a reinforced waterproof structure.

[0030] Specifically, the clamping section is a frame structure with an opening at one end, so that the corresponding two clamping sections form a fixed waterproof structure with a certain bypass path. Exemplarily, the opening of the frame structure is arranged along the width direction of the steel cage 10, so that after the two corresponding clamping sections are clamped and connected, the connection presents a multi-section complete bypass path, so as to extend the groundwater seepage path and improve the anti-seepage effect of the fixed waterproof structure.

[0031] In addition, compared with the I-beam joint structure, the two-stage clamping and the bypass path of the clamping section of the present invention can ensure the connection strength at the joint of the underground continuous wall 70 while avoiding deformation of the joint during construction, resulting in gaps at the joint and causing the concrete pouring at the joint to be loose.

[0032] Exemplarily, along the width direction of the steel cage 10 , the length of the clamping section is 1 / 4-2 / 5 of the width of the steel cage 10 .

[0033] Specifically, the clamping section is connected to the steel cage 10 via a plate body 40, and the width of the plate body 40 is greater than that of the steel cage 10, so that when pouring concrete, the plate body 40 can also serve as a barrier to prevent concrete from seeping to the surrounding area.

[0034] Specifically, Figure 5 and Figure 6 As shown, both ends of the cavity 50 are provided with limiting grooves 51 for facilitating the installation of the water-stopping material 60. For example, the opening of the limiting groove 51 faces the inside of the cavity 50, so that when the water-stopping material 60 is installed, the limiting groove 51 is used to preliminarily fix the water-stopping material 60. In addition, the setting of the limiting groove 51 can further extend the groundwater seepage path and improve the anti-seepage effect of the joint structure.

[0035] Specifically, the waterproof material 60 is fixed in the cavity 50 by a waterproof adhesive; illustratively, the waterproof adhesive is a waterproof glue.

[0036] The cut-off layer formed by the water-stop material 60 is parallel to the length direction of the steel cage 10 , dividing the cavity 50 into two parts.

[0037] Exemplarily, a water-swellable waterstop strip is also provided in the cavity 50. The water-swellable waterstop strip is arranged on both sides of the waterstop material 60 or on the water-facing side of the waterstop material 60, so that when water flows into the cavity 50 over the first fixed waterproof structure, the water-swellable waterstop strip expands to seal the leakage point, thereby improving the waterproof effect of the joint structure of the underground continuous wall 70.

[0038] The arrangement of the cavity 50 and the water-stop material 60 forms a water-stagnant space between the first fixed waterproof structure and the second fixed waterproof structure. Furthermore, by arranging a water-swellable waterstop strip in the water-stagnant space, on the one hand, the water-swelling effect of the water-swellable waterstop strip can be utilized to seal the leakage point at the connection between the first fixed waterproof structure and the cavity 50 on the water-facing side, that is, the water-swelling waterstop strip is utilized to repair the leakage point. On the other hand, the water-absorbing property of the water-swellable waterstop strip can also increase the water capacity of the water-stagnant space. Therefore, the cavity 50, the water-stop material 60 and the rainwater-swelling waterstop strip can be utilized to effectively improve the anti-seepage effect of the joint structure of the underground continuous wall 70.

[0039] Specifically, the water-stopping material 60 is a water-stopping metal coil or a water-stopping steel plate.

[0040] The present invention also provides a construction method of an underground continuous wall joint structure, comprising the following steps: S1. Determine the size of the joint structure according to the size of the underground continuous wall 70 at the construction site, and prefabricate the joint structure in the factory; S2. Tie the steel cage 10 according to the size of the foundation trench of the underground continuous wall 70, and reserve a certain overlap length at both ends of the steel cage 10; S3, welding the joint structure to both ends of the steel cage 10, then hoisting and lowering the steel cage 10 into the foundation trench of the underground continuous wall 70, and then hoisting and lowering another adjacent steel cage 10, so that the first clamping part and the second clamping part on the adjacent steel cage 10 are connected, so that the clamping section 1 21 and the clamping section 3 31 form a first fixed waterproof structure, and the clamping section 22 and the clamping section 4 32 form a second fixed waterproof structure; S4, placing the waterproof metal coil section by section into the limiting groove 51 of the cavity 50, and fixing the waterproof metal coil and the cavity 50 with waterproof glue, so that the waterproof metal coil forms a cut-off layer, so that the cavity 50 part serves as a reinforced waterproof structure; S5, repeat steps S3 and S4, and install the steel cage 10 in sequence; S6. First, pour concrete at the position of the steel cage 10, and then pour concrete at the joint of the underground continuous wall 70 after reaching a certain strength. The concrete pouring is carried out section by section until the entire underground continuous wall 70 is poured ( Figure 7 ).

[0041] Specifically, in step S4, water-swellable water-stop strips are provided on both sides of the water-stop metal coil or on the water-facing side of the water-stop metal coil.

[0042] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An underground continuous wall joint structure, characterized in that: include: Steel cage; A first clamping portion is arranged at one end of the steel cage, comprising a clamping section 1 and a clamping section 2 which are arranged in sequence along the width direction of the steel cage; The second clamping portion is correspondingly arranged at one end of the steel cage away from the first clamping portion, and includes a clamping section three and a clamping section four; When the first clamping part and the second clamping part on the adjacent steel cages are connected, the clamping section 1 and the clamping section 3 form a first fixed waterproof structure, the clamping section 2 and the clamping section 4 form a second fixed waterproof structure, and a cavity is formed between the first fixed waterproof structure and the second fixed waterproof structure; as well as The water-stopping material is arranged in the cavity to form a cut-off layer, so that the cavity portion serves as a reinforced waterproof structure.

2. The underground continuous wall joint structure according to claim 1, characterized in that: The clamping section is a frame structure with an opening at one end, so that the corresponding two clamping sections form a fixed waterproof structure with a certain bypass path.

3. The underground continuous wall joint structure according to claim 2 is characterized in that: The opening of the frame structure is arranged along the width direction of the steel cage.

4. The underground continuous wall joint structure according to claim 2, characterized in that: The clamping section is connected to the steel cage through a plate body, and the width of the plate body is greater than the width of the steel cage.

5. The underground continuous wall joint structure according to claim 1, characterized in that: The two ends of the cavity are also provided with limiting grooves for facilitating the installation of water-stopping materials.

6. The underground continuous wall joint structure according to claim 1, characterized in that: The water-stopping material is fixed in the cavity by a waterproof adhesive.

7. The underground continuous wall joint structure according to claim 1, characterized in that: The water-stopping material is a water-stopping metal coil or a water-stopping steel plate.

8. The underground continuous wall joint structure according to claim 1, characterized in that: A water-swellable water-stop strip is also arranged in the cavity.

9. The underground continuous wall joint structure according to claim 1, characterized in that: The cut-off layer formed by the water-stopping material is parallel to the length direction of the steel cage.

10. A construction method for an underground continuous wall joint structure according to claim 1, characterized in that: The following steps are involved: S1, respectively arranging the first clamping part and the second clamping part at two ends of the steel cage; S2, hoisting and lowering the steel cage into the underground continuous wall foundation trench, and then hoisting and lowering another adjacent steel cage, so that the first clamping portion and the second clamping portion on the adjacent steel cage are connected, so that the clamping section 1 and the clamping section 3 form a first fixed waterproof structure, and the clamping section 2 and the clamping section 4 form a second fixed waterproof structure; S3. Install and fix the water-stopping material in the cavity to form a cut-off layer, so that the cavity part serves as a reinforced waterproof structure.

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