Socket assembly type mechanical tunneling type shaft enclosure segment

Abstract

The utility model discloses a socket assembly type mechanical tunneling type shaft enclosure segment which is a wedge-shaped segment, the shaft enclosure segment is divided into an A-type segment and a B-type segment, the arc length of the upper portion of the A-type segment is smaller than that of the lower portion of the A-type segment, the arc length of the upper portion of the B-type segment is larger than that of the lower portion of the B-type segment, and the A-type segment and the B-type segment are spliced in a staggered mode to form a segment ring; the two arc-direction side walls of the vertical shaft enclosure pipe piece are each provided with a socket female opening piece and a socket male opening piece which are oppositely arranged up and down, the arc-direction side walls of the vertical shaft enclosure pipe piece are provided with splicing notches in the upper portions or the lower portions of the socket female opening pieces, and the A-type pipe piece and the B-type pipe piece are connected through matching of the socket female opening pieces and the socket male opening pieces. The socket type female opening piece and the socket type male opening piece are fixed to the vertical shaft enclosure pipe piece through anchor bars, and an inserting groove of the socket type male opening piece and a bearing groove of the socket type female opening piece are meshed with each other. The connecting structure has the advantages that weakening of section rigidity caused by arrangement of the bolt holes is reduced, and the bearing capacity of the structure is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of shaft segments, and in particular to a socket-assembled mechanical tunneling shaft retaining segment. Background Technology

[0002] In recent years, mechanical tunneling caisson construction technology has been applied to the field of vertical shafts due to its advantages such as fast construction speed, small construction area, wide adaptability to strata and minimal impact on the surrounding environment. The application of this method has effectively solved the dilemma of difficulty in carrying out foundation pit excavation in urban core areas with complex surrounding environments.

[0003] Currently, the retaining structure of mechanically excavated shafts is assembled using wedge-shaped segments connected by bolts. On the one hand, segment assembly requires manual pre-tightening and re-tightening of bolts, which results in limited operating space, low assembly efficiency, and difficulty in ensuring assembly quality. On the other hand, it requires pre-reserving bolt holes, which significantly weakens the cross-section and reduces its stiffness. At the same time, the longitudinal joint oblique bolts have poor stress resistance, reducing the load-bearing capacity of the shaft retaining structure. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a socket-mounted, assembled mechanical tunneling shaft retaining segment. This retaining segment is wedge-shaped and divided into type A and type B segments. Type A and type B segments are staggered and spliced ​​to form a segment ring. Both sides of the arc-shaped retaining segment are equipped with socket-type female and male fittings arranged vertically. Assembly slots are provided on the upper or lower parts of the socket-type female fittings on the arc-shaped sidewalls of the retaining segment. Type A and type B segments are connected through the mating of the socket-type female and male fittings. The use of socket-type female and male fittings reduces the weakening of cross-sectional stiffness caused by bolt holes, thereby improving the structural bearing capacity.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A type of socket-assembled mechanical tunneling shaft retaining segment, wherein the shaft retaining segment is a wedge-shaped segment, and the shaft retaining segment is divided into type A segment and type B segment. The upper arc length of the type A segment is smaller than the lower arc length, and the upper arc length of the type B segment is larger than the lower arc length. The type A segment and type B segment are staggered and spliced ​​to form a segment ring. Both sides of the arc-shaped retaining segment are equipped with socket-type female fittings and socket-type male fittings arranged vertically. The male connector has an assembly slot on the arc-shaped sidewall of the shaft retaining segment at the upper or lower part of the female connector. The A-type segment and the B-type segment are connected by the female connector and the male connector. Both the female connector and the male connector are fixed to the shaft retaining segment by anchor bars. The slot of the male connector and the groove of the female connector interlock with each other.

[0007] The shaft retaining pipe segment has several reserved holes along its arc direction. The reserved holes are vertically set and penetrate the shaft retaining pipe segment. Each reserved hole consists of a cylindrical hole and two flared holes that are respectively connected to both ends of the cylindrical hole. Two vertically adjacent shaft retaining pipe segments are connected by a continuous bolt or shear pin. The flared holes at the top of the lower layer of shaft retaining pipe segment and the flared holes at the bottom of the upper layer of shaft retaining pipe segment form installation holes.

[0008] The through bolt includes a connecting screw, a connecting nut, and a washer. The connecting screw is installed in the cylindrical hole of the reserved hole, and both ends of the connecting screw extend into the mounting hole. Two vertically adjacent connecting screws are connected by the connecting nut, and the connecting nut is fixed in the mounting hole by the washer.

[0009] The shape and size of the shear pin are respectively matched with the shape and size of the mounting hole. The shear pin is installed in the mounting hole, and the two ends of the shear pin are respectively inserted into the cylindrical holes of the reserved holes of the two vertically adjacent shaft retaining pipe segments.

[0010] The shaft retaining pipe section has several hoisting holes along its arc direction.

[0011] The vertical shaft retaining pipe segment has grooves for placing waterstops on both sides of the arc and on the top and bottom.

[0012] The wedge angle of the shaft retaining segments is 10°~20°.

[0013] The advantages of this utility model are:

[0014] (1) The use of socket-type male and female joints reduces the weakening of cross-sectional stiffness due to the arrangement of bolt holes and improves the structural bearing capacity;

[0015] (2) The vertical shaft segments are connected by interlocking male and female socket joints, which reduces manual operation and improves construction efficiency;

[0016] (3) The splicing quality of the socket-type prefabricated shaft retaining segments is high, which helps to improve the construction quality of the shaft and reduce the construction difficulty of subsequent processes;

[0017] (4) The segment is designed in a wedge shape, which is conducive to the compression of the waterstop and the interlocking connection of the socket-type male and female joints. The assembly work can be completed simply by hoisting the segment into place, which makes the construction very convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the shaft retaining segment of this utility model;

[0019] Figure 2 This is a schematic diagram of the socket-type female connector of this utility model;

[0020] Figure 3 This is a schematic diagram of the socket-type male connector of this utility model;

[0021] Figure 4 This is a schematic diagram of the longitudinal seam connection of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection of the circumferential seam of this utility model;

[0023] Figure 6 This is a schematic diagram of the shear pin of this utility model;

[0024] Figure 7 This is a plan view of the connection of the shaft retaining pipe segments of this utility model;

[0025] like Figures 1-7 As shown in the figure, the labels represent:

[0026] Shaft retaining segments 1, Type A segments 101, Type B segments 102, socket-type female connector 2, first anchor bar 201, groove 202, socket-type male connector 3, second anchor bar 301, slot 302, assembly groove 4, reserved hole 5, cylindrical hole 501, flared hole 502, waterstop groove 6, continuous bolt 7, connecting screw 701, connecting nut 702, washer 703, shear pin 8, lifting hole 9. Detailed Implementation

[0027] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0028] Example: Figures 1-7As shown, this embodiment relates to a socket-assembled mechanical tunneling shaft retaining segment. The shaft retaining segment 1 is a wedge-shaped segment. The shaft retaining segment 1 is divided into type A segment 101 and type B segment 102. The upper arc length of type A segment 101 is less than the lower arc length, and the upper arc length of type B segment 102 is greater than the lower arc length. Type A segment 101 and type B segment 102 are staggered and spliced ​​to form a segment ring. Both sides of the arc-shaped retaining segment 1 of the shaft are equipped with socket-type female fittings 2 and socket-type male fittings 3 arranged vertically. Specifically, the upper part of the arc-shaped retaining segment 101 of type A segment has socket-type female fittings 2 and the lower part has socket-type male fittings 3. The upper part of the arc-shaped retaining segment 102 of type B segment has socket-type male fittings 3 and the lower part has socket-type female fittings 2. Both socket-type female fittings 2 and socket-type male fittings 3 are made of cast iron. The arc-shaped sidewall of the shaft retaining segment 1 has an assembly slot 4 at the upper or lower part of the socket-type female connector 2. That is, the arc-shaped sidewall of type A segment 101 has an assembly slot 4 at the upper part of the socket-type female connector 2, and the arc-shaped sidewall of type B segment 102 has an assembly slot 4 at the lower part of the socket-type female connector 2. Type A segment 101 and type B segment 102 are connected by the mating of the socket-type female connector 2 and the socket-type male connector 3. Both the socket-type female connector 2 and the socket-type male connector 3 are anchored. The reinforcing bars (first anchor bar 201 and second anchor bar 301) are respectively fixed to the shaft retaining pipe segment 1. In this embodiment, the socket-type female connector 2 is fixed to the shaft retaining pipe segment 1 by two first anchor bars 201, and the socket-type male connector 3 is fixed to the shaft retaining pipe segment 1 by two second anchor bars 301. The slot 302 of the socket-type male connector 3 and the groove 202 of the socket-type female connector 2 engage with each other. In this embodiment, the slot 302 of the socket-type male connector 3 and the groove 202 of the socket-type female connector 2 are both T-shaped.

[0029] During assembly, the male socket 3 connects and fixes the two adjacent vertical shaft retaining segments 1 (Type A segment 101 and Type B segment 102) by engaging with the female socket 2 through the assembly slot 4.

[0030] like Figures 1-6 As shown, the shaft retaining pipe segment 1 has several (four in this embodiment) reserved holes 5 along its arc direction. The reserved holes 5 are vertically arranged and penetrate through the shaft retaining pipe segment 1. The reserved hole 5 consists of a cylindrical hole 501 and two flared holes 502 that are respectively connected to both ends of the cylindrical hole 501. The flared holes 502 have a large diameter end and a small diameter end. Both ends of the cylindrical hole 501 are connected to the small diameter end of the flared holes 502. Two vertically adjacent shaft retaining pipe segments 1 are connected by a through bolt 7 or a shear pin 8. The flared holes 502 at the top of the lower shaft retaining pipe segment 1 and the flared holes 502 at the bottom of the upper shaft retaining pipe segment 1 form mounting holes for placing the through bolt 7 or the shear pin 8.

[0031] Among them, such as Figure 5 As shown, the through bolt 7 includes a connecting screw 701, a connecting nut 702, and a washer 703. The connecting screw 701 is installed in the cylindrical hole 501 of the reserved hole 5, and both ends of the connecting screw 701 extend into the mounting hole. Two vertically adjacent connecting screws 701 are connected by the connecting nut 702, and the connecting nut 702 is fixed in the mounting hole by the washer 703. The through bolt 7 connects the vertical shaft retaining pipe segments 1 ring by ring through the connecting screw 701, the connecting nut 702, and the washer 703.

[0032] like Figure 6 As shown, the shape and size of the shear pin 8 are matched with the shape and size of the mounting hole. The shear pin 8 is installed in the mounting hole, and its two ends are respectively inserted into the cylindrical holes 501 of the reserved holes 5 of the two vertically adjacent shaft retaining segments 1. The shear pin 8 is used to improve the shear resistance of the shaft structure.

[0033] like Figure 7 As shown, the shaft retaining pipe segment 1 is provided with several (two in this embodiment) hoisting holes 9 along its arc direction. The hoisting holes 9 are used for hoisting, moving and assembling the shaft retaining pipe segment 1. When assembling the shaft retaining pipe segment 1 into a ring, all the A-type pipe segments 101 should be placed in place first, and then the B-type pipe segments 102 should be hoisted one by one to the middle of the adjacent A-type pipe segments 101 to form a complete ring of pipe segments.

[0034] like Figure 1 and Figure 7 As shown, the vertical shaft retaining pipe segment 1 has waterstop grooves 6 on both sides of the arc and on the top and bottom parts for placing waterstops. In this embodiment, the vertical shaft retaining pipe segment 1 has two waterstop grooves 6 on both sides of the arc and on the top and bottom parts.

[0035] In addition, the wedge angle of the shaft retaining segment 1 is 10°~20°. The wedge angle of the shaft retaining segment 1 refers to the angle between the arc sidewall and the vertical surface of the shaft retaining segment 1. This facilitates the extrusion of the waterstop and the interlocking connection of the socket-type female joint 2 and the socket-type male joint 3 by relying solely on the weight of the segment during segment assembly.

[0036] The beneficial technical effects of this embodiment are as follows:

[0037] (1) The use of socket-type male and female joints reduces the weakening of cross-sectional stiffness due to the arrangement of bolt holes and improves the structural bearing capacity;

[0038] (2) The vertical shaft segments are connected by interlocking male and female socket joints, which reduces manual operation and improves construction efficiency;

[0039] (3) The splicing quality of the socket-type prefabricated shaft retaining segments is high, which helps to improve the construction quality of the shaft and reduce the construction difficulty of subsequent processes;

[0040] (4) The segment is designed in a wedge shape, which is conducive to the compression of the waterstop and the interlocking connection of the socket-type male and female joints. The assembly work can be completed simply by hoisting the segment into place, which makes the construction very convenient.

[0041] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A socket-mounted, assembled mechanically tunneling shaft retaining segment, characterized in that... The shaft retaining segments are wedge-shaped segments, divided into type A segments and type B segments. The upper arc length of the type A segment is shorter than the lower arc length, while the upper arc length of the type B segment is longer than the lower arc length. The type A and type B segments are staggered and spliced ​​to form a segment ring. Each of the arc-shaped side walls of the shaft retaining segments is equipped with a female and a male socket-type fitting arranged vertically. The arc-shaped side walls of the shaft retaining segments have assembly slots at the upper or lower part of the female socket-type fitting. The type A and type B segments are connected by the female socket-type fitting and the male socket-type fitting. Both the female and male socket-type fittings are fixed to the shaft retaining segments by anchor bars, with the slot of the male socket-type fitting interlocking with the groove of the female socket-type fitting.

2. The socket-mounted, assembled mechanical tunneling shaft retaining segment as described in claim 1, characterized in that... The shaft retaining pipe segment has several reserved holes along its arc direction. The reserved holes are vertically set and penetrate the shaft retaining pipe segment. Each reserved hole consists of a cylindrical hole and two flared holes that are respectively connected to both ends of the cylindrical hole. Two vertically adjacent shaft retaining pipe segments are connected by a continuous bolt or shear pin. The flared holes at the top of the lower layer of shaft retaining pipe segment and the flared holes at the bottom of the upper layer of shaft retaining pipe segment form installation holes.

3. The socket-mounted, assembled mechanically tunneling shaft retaining segment as described in claim 2, characterized in that... The through bolt includes a connecting screw, a connecting nut, and a washer. The connecting screw is installed in the cylindrical hole of the reserved hole, and both ends of the connecting screw extend into the mounting hole. Two vertically adjacent connecting screws are connected by the connecting nut, and the connecting nut is fixed in the mounting hole by the washer.

4. The socket-mounted, assembled mechanical tunneling shaft retaining segment as described in claim 2, characterized in that... The shape and size of the shear pin are respectively matched with the shape and size of the mounting hole. The shear pin is installed in the mounting hole, and the two ends of the shear pin are respectively inserted into the cylindrical holes of the reserved holes of the two vertically adjacent shaft retaining pipe segments.

5. The socket-mounted, assembled mechanical tunneling shaft retaining segment as described in claim 1, characterized in that... The shaft retaining pipe section has several hoisting holes along its arc direction.

6. The socket-mounted mechanical tunneling shaft retaining segment as described in claim 1, characterized in that... The vertical shaft retaining pipe segment has grooves for placing waterstops on both sides of the arc and on the top and bottom.

7. The socket-mounted, assembled mechanical tunneling shaft retaining segment as described in claim 1, characterized in that... The wedge angle of the shaft retaining segments is 10°~20°.

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