A deep-buried center water ditch inspection well inverted arch primary support steel frame socket joint structure

Abstract

The utility model discloses a kind of deep-buried center water ditch inspection well place inverted arch primary support steel frame socket-and-spigot connection structure.In cold region tunnel construction, to set up center deep-buried water ditch inspection well, inverted arch primary support steel frame corresponding position needs to be disconnected.The utility model includes two longitudinal side vertical HW profile steels and two annular vertical HW profile steels;The longitudinal side vertical HW profile steel is set along tunnel longitudinal direction, and annular vertical HW profile steel is set along tunnel transverse direction;Longitudinal side vertical HW profile steel both ends are fixedly connected with annular vertical HW profile steel side, form rectangular closed structure;The initial support steel frame of truncation is inserted into I-beam clamping slot on longitudinal side vertical HW profile steel and two annular vertical HW profile steels, to realize socket-and-spigot connection.The utility model does not need field welding, anchor rod locking is exempted, structure is simple, construction efficiency and quality stability are high.

Description

Technical Field

[0001] This utility model belongs to the field of underground engineering technology, specifically relating to a socket-type connection structure for the initial support steel frame of the inverted arch at a deeply buried central water ditch inspection well. Background Technology

[0002] my country has a wide distribution of cold regions with high transportation demand. Tunnel engineering, as an effective means of traversing mountains and valleys, is widely used in transportation projects in cold regions. In tunnel construction in cold regions, to install a central deep-buried water ditch inspection well, it is necessary to disconnect the initial support steel frame of the invert arch at the corresponding position. Traditional methods include: 1) welding connecting plates or drilling holes at the disconnected end of the steel frame; 2) using anchor bolts to secure the break; 3) adding a longitudinal connecting steel frame and connecting the disconnected steel frame by welding or bolting. In all these methods, welding requires preheating treatment, the quality of low-temperature welding is difficult to guarantee, and the construction efficiency of welding and bolting connections is low. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a socket-type connection structure for the initial support steel frame of the inverted arch at the inspection well of the deep-buried central water ditch. It requires no on-site welding and no anchor bolt locking, has a simple structure, and offers high construction efficiency and quality stability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A socket-type connection structure for the initial support steel frame of the inverted arch at a deep-buried central water ditch inspection well includes two longitudinally upright HW-shaped steel sections and two circumferentially upright HW-shaped steel sections.

[0006] The longitudinally upright HW-shaped steel is installed along the longitudinal direction of the tunnel, and the circumferentially upright HW-shaped steel is installed along the transverse direction of the tunnel.

[0007] The two ends of the longitudinally upright HW-shaped steel are fixedly connected to the sides of the circumferentially upright HW-shaped steel to form a rectangular closed structure;

[0008] The cut-off initial support steel frame is inserted into the I-beam slots on the longitudinal lateral HW-shaped steel and the two circumferential vertical HW-shaped steel to achieve a socket connection.

[0009] Furthermore, the longitudinally upright HW-shaped steel includes a longitudinal solid section, with longitudinal HW-shaped steel sections connected to both sides of the longitudinal solid section, and an I-beam slot is provided inside the longitudinal solid section.

[0010] Furthermore, the circumferential upright HW-shaped steel includes a circumferential HW-shaped steel section, with circumferential solid sections at both ends of the circumferential HW-shaped steel section, and an I-beam slot provided inside the circumferential solid section.

[0011] Furthermore, within the rectangular closed structure formed by two longitudinally upright HW-shaped steel sections and two circumferentially upright HW-shaped steel sections, HW-shaped steel diagonal braces are respectively installed at the four corners.

[0012] Furthermore, the two ends of the HW-shaped steel diagonal brace are welded to the longitudinal solid section and the circumferential HW-shaped steel section, respectively.

[0013] Furthermore, the longitudinal HW-shaped steel section has an H-shaped cross-section.

[0014] Furthermore, the cross-section of the circumferential HW-shaped steel section is I-shaped.

[0015] The beneficial effects of this utility model are:

[0016] 1) This utility model uses two longitudinally upright HW-shaped steel sections and two circumferentially upright HW-shaped steel sections to form a closed prefabricated socket-type connection structure. The cut-off initial support steel frame is connected to the prefabricated socket-type connection structure to jointly bear the force transmitted by the cut-off initial support steel frame.

[0017] 2) This utility model adopts factory prefabrication and on-site socket connection, eliminating the need for on-site welding, anchoring and other processes. It has a simple structure, high construction efficiency and quality stability, thereby improving the safety of tunnel operation. Attached Figure Description

[0018] Figure 1 This is a front view of the prefabricated socket connection structure of this utility model;

[0019] Figure 2 This is a top view of the prefabricated socket connection structure of this utility model;

[0020] Figure 3 yes Figure 2 Sectional view I-I;

[0021] Figure 4 This is a schematic diagram of a longitudinally erected HW-type steel structure;

[0022] Figure 5 This is a schematic diagram of the connection between the circumferential upright HW section and the longitudinal lateral upright HW section;

[0023] In the diagram, 1-Longitudinal lateral HW-section steel, 2-Circumferential vertical HW-section steel, 101-Longitudinal solid section, 102-HW-section steel section, 201-Circumferential HW-section steel section, 202-Circumferential solid section, 3-HW-section steel diagonal brace, 4-Initial support steel frame. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments.

[0025] This utility model uses two longitudinally upright HW-shaped steel sections and two circumferentially upright HW-shaped steel sections to form a closed prefabricated socket-type connection structure. The cut-off initial support steel frame is connected to the prefabricated socket-type connection structure to jointly bear the force transmitted by the cut-off initial support steel frame.

[0026] like Figure 1 , 2 As shown in Figure 3, the invert arch initial support steel frame socket connection structure of the deep buried central water ditch inspection well of this utility model includes two longitudinally upright HW steel 1 and two circumferentially upright HW steel 2; the longitudinally upright HW steel 1 is set along the longitudinal direction of the tunnel, and the circumferentially upright HW steel 2 is set along the transverse direction of the tunnel.

[0027] like Figure 4 As shown, the longitudinally upright HW-shaped steel 1 includes a longitudinal solid section 101, with longitudinal HW-shaped steel sections 102 connected to both sides of the longitudinal solid section 101. An I-beam slot is provided inside the longitudinal solid section 101, and the cross-section of the longitudinal HW-shaped steel section 102 is H-shaped.

[0028] The circumferential upright HW-shaped steel 2 includes a circumferential HW-shaped steel section 201, with circumferential solid sections 202 at both ends of the circumferential HW-shaped steel section 201. An I-beam slot is provided inside the circumferential solid section 202, and the cross-section of the circumferential HW-shaped steel section 201 is I-shaped.

[0029] The longitudinally upright HW-shaped steel 1 is fixedly connected at both ends to the sides of the circumferentially upright HW-shaped steel 2, such as... Figure 5 As shown, the longitudinal HW-shaped steel sections 102 at both ends of the longitudinally upright HW-shaped steel 1 are welded to the circumferential solid section 202 to form a rectangular closed structure; the cut-off initial support steel frame 4 is inserted into the I-beam slots on the longitudinally upright HW-shaped steel 1 to form a type A joint; the cut-off initial support steel frame 4 is inserted into the I-beam slots at both ends of the circumferential upright HW-shaped steel 2 to form a type B joint, thus finally achieving a socket connection.

[0030] To increase the strength of the connection structure, HW-shaped steel diagonal braces 3 are installed at the four corners of the rectangular closed structure formed by two longitudinally upright HW-shaped steel sections 1 and two circumferentially upright HW-shaped steel sections 2. The two ends of the HW-shaped steel diagonal braces 3 are welded to the longitudinal solid section 101 and the circumferential HW-shaped steel section 201, respectively.

[0031] The construction method of the inverted arch initial support steel frame socket connection structure at the inspection well of the deep buried central water ditch of this utility model includes the following steps:

[0032] Step 1: Tunnel excavation, but not excavation of the inspection well section;

[0033] Step 2: After measurement and positioning, place a prefabricated socket connection structure consisting of two longitudinal lateral HW steel sections 1 and two circumferential vertical HW steel sections 2, and connect it to the cut-off initial support steel frame 4 through joints. Simultaneously install the initial support steel frame of the side wall and fix it to the other end of the cut-off steel frame.

[0034] Step 3: Excavate the inspection well and construct the inspection well lining;

[0035] Step 4: After the manhole lining reaches the required strength, begin the initial tunnel support construction;

[0036] Step 5: After the initial support reaches its strength, construct the secondary lining of the tunnel, fill the invert arch, and install the water ditch and cable trench.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A socket-type connection structure for the initial support steel frame of the inverted arch at a deeply buried central water ditch inspection well, characterized in that: It includes two longitudinally upright HW-shaped steel sections (1) and two circumferentially upright HW-shaped steel sections (2); The longitudinally upright HW steel (1) is set along the longitudinal direction of the tunnel, and the circumferentially upright HW steel (2) is set along the transverse direction of the tunnel; The longitudinally upright HW steel (1) is fixedly connected at both ends to the side of the circumferentially upright HW steel (2) to form a rectangular closed structure; The cut-off initial support steel frame (4) is inserted into the I-beam slots on the longitudinal side-standing HW steel (1) and the two circumferential vertical HW steel (2) to achieve a socket connection.

2. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 1, characterized in that: The longitudinal side-standing HW steel (1) includes a longitudinal solid section (101), and longitudinal HW steel sections (102) are connected to both sides of the longitudinal solid section (101). An I-beam slot is provided in the longitudinal solid section (101).

3. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 2, characterized in that: The circumferential upright HW steel (2) includes a circumferential HW steel section (201), and a circumferential solid section (202) is provided at both ends of the circumferential HW steel section (201). An I-beam slot is provided in the circumferential solid section (202).

4. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 3, characterized in that: Within the rectangular closed structure formed by two longitudinally upright HW-shaped steel sections (1) and two circumferentially upright HW-shaped steel sections (2), HW-shaped steel diagonal braces (3) are respectively installed at the four corners.

5. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 4, characterized in that: The two ends of the HW-shaped steel diagonal brace (3) are welded to the longitudinal solid section (101) and the circumferential HW-shaped steel section (201), respectively.

6. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 5, characterized in that: The longitudinal HW-shaped steel section (102) has an H-shaped cross-section.

7. The socket-type connection structure of the initial support steel frame for the inverted arch at the inspection well of the deep-buried central water ditch according to claim 6, characterized in that: The cross-section of the circumferential HW steel section (201) is I-shaped.

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