Construction method of anti-dislocation fracture structure at underground continuous wall joints

Abstract

The present invention provides a method for constructing a structure that prevents dislocation and fracture at the joints of an underground continuous wall, and relates to the technical field of continuous wall construction. In this method, connectors and a steel cage are first manufactured, a base is constructed in a foundation trench, and steel segments are pre-buried and installed in the base. The steel cage is connected to the base by a number of connectors and the installation of steel segments, and finally the wall is cast. This method changes the traditional construction method of directly placing the steel cage in the foundation trench. Instead, in the process of constructing the continuous wall in sections, the base is first constructed in the foundation trench, and then the wall is cast on the base, and the construction of the entire continuous wall is repeated continuously. The steel cage is connected to the cast base by connectors to ensure the connection strength. This method avoids the problem that multiple sections of continuous walls directly contact the inner wall surface of the foundation trench and cannot resist foundation settlement, causing reflective cracks.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous wall construction, in particular to a construction method of an anti-dislocation fracture structure at a joint of an underground continuous wall. Background Art

[0002] The typical construction process for a diaphragm wall involves trenching first, followed by pouring. However, it cannot be cast all at once and must be done in sections. The steps for this section typically involve cleaning the trench walls first, placing the steel cage inside, and finally pouring the concrete.

[0003] Because the joints between the newly cast and previously constructed underground diaphragm walls are full-section lap joints, and the bearing capacity of the foundation varies across different road sections, reflective cracks are more likely to appear in the diaphragm walls cast earlier or later in areas with poor bearing capacity due to foundation settlement. These cracks can cause water seepage and impact construction quality. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a construction method for preventing dislocation and fracture of underground continuous wall joints to solve the above problems.

[0005] Based on the above purpose, the present invention provides a construction method for preventing dislocation and fracture of underground continuous wall joints, which is carried out according to the following steps:

[0006] S1. Make a plurality of connecting pieces, each of which has a first mounting groove and a second mounting groove at both ends.

[0007] S2. Make a steel cage, and install connectors on the vertical steel bars at the bottom of the steel cage so that the ends of the vertical steel bars are inserted into the first installation grooves.

[0008] S3. Carry out base construction and pre-embed several vertically arranged installation steel bar segments on the base.

[0009] S4. Connect the end of the connector to the installation steel bar segment so that the exposed installation steel bar segment is completely installed in the second installation groove.

[0010] S5. Cast the wall.

[0011] S6. Repeat S1 to S5 until the construction of the continuous wall is completed.

[0012] Compared with existing technologies, the present invention offers the following advantages: It changes the traditional construction method of directly placing a steel cage into the foundation trench. Instead, during the segmented diaphragm wall construction process, a base is first constructed within the foundation trench, and then the wall is cast on top of the base, repeating this process to complete the entire diaphragm wall. Connectors are used to connect the steel cage to the cast base, ensuring joint strength. This method avoids the problem of multiple diaphragm walls directly contacting the inner wall of the foundation trench, which would be unable to resist foundation settlement and cause reflective cracks.

[0013] Furthermore, step S1 specifically includes: making an upper threaded sleeve, the upper threaded sleeve is a cylindrical structure, and a first installation groove is opened at one end of the upper threaded sleeve; making a lower threaded sleeve, the lower threaded sleeve is a cylindrical structure, and a second installation groove is opened at one end of the lower threaded sleeve; the other end of the upper threaded sleeve is arranged opposite to the other end of the lower threaded sleeve, and they are rotated together to form a connecting piece.

[0014] Furthermore, in S2, connecting pieces are respectively installed on the vertical steel bars at the bottom end of the steel cage so that the ends of the vertical steel bars are inserted into the first installation groove, including: opening a first external thread at the ends of the vertical steel bars at the bottom end of the steel cage; opening a first internal thread in the first installation groove; installing connecting pieces on the vertical steel bars so that the ends of the vertical steel bars are inserted into the first installation groove; rotating the upper threaded sleeve to thread the upper threaded sleeve onto the vertical steel bars.

[0015] Furthermore, step S4 specifically includes: installing a pad on the installation steel bar segment, the pad is located on the upper surface of the base; opening a second external thread at the end of the installation steel bar segment; opening a second internal thread in the second installation groove near one end of the upper threaded sleeve; connecting the connecting piece to the installation steel bar segment so that the installation steel bar segment is installed in the second installation groove; rotating the lower threaded sleeve, threading the lower threaded sleeve onto the installation steel bar segment, and the bottom end of the lower threaded sleeve is against the upper surface of the pad.

[0016] Furthermore, the foundation construction in S3 includes: laying a reinforced base plate in the excavated foundation trench; pouring in the foundation trench to complete the foundation construction. The installation of the reinforced base plate ensures that the foundation can be laid and poured stably, improving the structural strength and load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a construction method for preventing dislocation and fracture of a joint structure of an underground continuous wall provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the internal structure of a construction method for preventing dislocation and fracture structures at underground continuous wall joints provided by an embodiment of the present invention.

[0019] The markings in the figure are: 1. Steel cage; 2. Vertical steel bars; 3. Installation steel bar segment; 4. Continuous wall; 5. Steel bar bottom plate; 6. Upper threaded sleeve; 7. Lower threaded sleeve; 8. Spacer; 9. Base. Implementation Method

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0021] like Figure 1 and Figure 2 As shown, the present invention proposes a method for constructing an anti-dislocation fracture structure at an underground continuous wall joint, which is carried out according to the following steps:

[0022] S1. Fabricate several connectors. The number of connectors is determined based on the intended use and the structure of the steel cage 1. Specifically, fabricate an upper threaded sleeve 6. The upper threaded sleeve 6 is a cylindrical structure with a first mounting groove defined at one end. Fabricate a lower threaded sleeve 7. The lower threaded sleeve 7 is a cylindrical structure with a second mounting groove defined at one end. Position the other end of the upper threaded sleeve 6 opposite the other end of the lower threaded sleeve 7 and rotate them together to form a connector.

[0023] S2. Fabricate the steel cage 1. Create a first external thread on the end of the vertical steel bar 2 at the bottom of the cage 1. Create a first internal thread in the first mounting groove, matching the first external thread. Install connectors on the vertical steel bars 2, ensuring the ends of the vertical steel bars 2 fit into the first mounting groove. Rotate the upper threaded sleeve 6 to threadably connect it to the vertical steel bars 2.

[0024] S3. Construction of the base 9 begins. The steel base plate 5 is laid in the excavated foundation trench. The installation of the steel base plate 5 ensures stable laying and pouring of the base 9, improving structural strength and load-bearing capacity. Casting is performed in the foundation trench, completing the construction of the base 9. During construction of the base 9, several vertical installation steel bar segments 3 are pre-embedded in the base 9. The number and location of the installation steel bar segments 3 correspond to the number and location of the connectors attached to the vertical steel bars 2 of the steel cage 1. The exposed portions of the installation steel bar segments 3 outside the base 9 are galvanized to prevent rust.

[0025] S4. Install a spacer block 8 on the installation rebar segment 3, with the spacer block 8 positioned on the upper surface of the base 9. Provide a second external thread at the end of the installation rebar segment 3. Provide a second internal thread in the second installation groove, near the end of the upper threaded sleeve 6. The portion of the inner wall of the second installation groove not provided with the second internal thread should be smooth. The second internal thread should mate with the second external thread. Connect the connector to the installation rebar segment 3, so that the installation rebar segment 3 is inserted into the second installation groove. Rotate the lower threaded sleeve 7, threading it onto the installation rebar segment 3, with the bottom end of the lower threaded sleeve 7 abutting against the upper surface of the spacer block 8.

[0026] S5. Cast the wall to complete the construction of the continuous wall 4 of this section.

[0027] S6. Repeat S1 to S5 until the construction of the entire continuous wall is completed.

[0028] Therefore, the present invention changes the traditional construction method of directly placing the steel cage 1 into the foundation trench. Instead, during the segmented diaphragm wall construction process, the base 9 is first constructed within the foundation trench, and then the wall body is cast on top of the base 9, repeating this process to complete the entire diaphragm wall construction. Connectors are used to connect the steel cage 1 to the cast base 9 to ensure joint strength. This method avoids the problem of multiple diaphragm walls directly contacting the inner wall of the foundation trench, thereby being unable to resist foundation settlement and causing reflective cracks.

[0029] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for preventing dislocation and fracture of underground continuous wall joints, characterized in that: Follow these steps: S1. Prepare a plurality of connectors, each of which has a first mounting groove and a second mounting groove at both ends; S2. Make a steel cage and install connectors on the vertical steel bars at the bottom of the cage so that the ends of the vertical steel bars are inserted into the first installation grooves; Install connectors on the vertical steel bars at the bottom of the steel cage so that the ends of the vertical steel bars are inserted into the first installation grooves, including: A first external thread is provided at the end of the vertical steel bar at the bottom end of the steel cage; A first internal thread is provided in the first installation groove; Install connectors on the vertical steel bars respectively so that the ends of the vertical steel bars are inserted into the first installation grooves; Rotate the upper threaded sleeve to thread the upper threaded sleeve onto the vertical steel bar; S3. Carry out basement construction and pre-embed several vertically arranged installation steel bar segments on the basement; S4. Connect the end of the connector to the installation steel bar segment so that the exposed installation steel bar segment is completely installed in the second installation groove; A pad is installed on the steel bar installation section, and the pad is located on the upper surface of the base; A second external thread is provided at the end of the installation steel bar segment; A second internal thread is formed in the second installation groove at one end close to the upper threaded sleeve; Connect the connector to the installation steel bar segment so that the installation steel bar segment is inserted into the second installation groove; Rotate the lower threaded sleeve to thread the lower threaded sleeve onto the installation steel bar segment, with the bottom end of the lower threaded sleeve butting against the upper surface of the pad; S5, pouring the wall; S6. Repeat S1 to S5 until the construction of the continuous wall is completed; Step S1 specifically includes: An upper threaded sleeve is manufactured, wherein the upper threaded sleeve is a cylindrical structure, and a first mounting groove is provided at one end of the upper threaded sleeve; A lower threaded sleeve is manufactured, wherein the lower threaded sleeve is a cylindrical structure, and a second mounting groove is provided at one end of the lower threaded sleeve; The other end of the upper threaded sleeve and the other end of the lower threaded sleeve are arranged opposite to each other and are rotated and connected together to form a connecting piece.

2. The construction method of the anti-dislocation fracture structure at the underground continuous wall joint according to claim 1 is characterized in that: The base construction in S3 includes: Lay the steel base plate in the excavated foundation trench; Casting is carried out in the foundation trench to complete the base construction.

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