CN116066141A - A Segment Circular Limiting Part Structure and Its Application in Segment - Google Patents

Abstract

The invention discloses a duct piece circumferential limiting part structure and application thereof in duct pieces, and relates to the technical field of tunnel duct pieces, wherein a concrete structure of a connecting and fastening assembly comprises the following components: the mold is internally provided with a pouring cavity; the hand hole mold core is arranged at the bottom side of the pouring cavity; the sleeve is arranged between the side wall of the pouring cavity and the hand hole mold core; the limiting mold core is arranged between the end part of the sleeve and the side wall of the mold; the first rubber pad is arranged in one end of the sleeve; the second rubber pad is arranged in the other end of the sleeve, and the end part of the second rubber pad is in contact with the limiting mold core; a core rod extending from one side of the die to the inside of the sleeve; and the spring propping device is arranged at the outer side of the die, and the end part of the spring propping device is matched with the end part of the core rod. The application of the composite pipe comprises a pipe piece, a manufacturing method and an assembling method. The invention solves the technical problem that the arc-shaped connecting bolts cannot be well protected when the existing shield segment is assembled.

Description

A Segment Circular Limiting Part Structure and Its Application in Segment

technical field

The invention relates to the technical field of tunnel segments, in particular to a structure of a segment circumferential limiting member and its application in segments.

Background technique

Shield tunnel refers to a tunnel structure that is excavated by a shield machine and assembled from prefabricated concrete segments. The shield tunnel is affected by the attitude adjustment of the shield machine during the construction process, the floating of the segment, the construction disturbance around the long-term operation, and the environmental evolution. The tunnel structure is prone to deformation, joint opening, misalignment, and water leakage, which reduces the safety of the structure. and durability.

When the existing shield segment is assembled during construction, in order to prevent errors during assembly, which will affect the construction assembly, structural stress state and waterproof effect, concave and convex tongues and grooves are usually designed on the block surface of the shield segment to be used for The limit when the segments are assembled. Although the concave-convex tenon design is convenient for construction and assembly, it has a negative impact on the structural design and production costs. In addition, there are still positioning tenons that use the limit tenon, but the force point of the limit tenon is small, which is easy to cause the limit. The damage of the position tenon and the limit tenon are not easy to replace after damage, the structure is unevenly stressed, and there are potential safety hazards.

Contents of the invention

The purpose of the present invention is to provide a segment ring limiter structure and its application in the segment, which solves the technical problem that the arc-shaped connecting bolts cannot be well protected when the shield segments in the prior art are assembled .

The embodiment of the present application discloses a segmental circumferential limiter structure of a pre-embedded threaded casing, including:

A mold, the inside of which is provided with a pouring cavity;

at least one hand hole mold core installed on the bottom side of the pouring cavity;

At least one sleeve is arranged between the side wall of the pouring cavity and the hand hole mold core;

At least one position-limiting mold core is arranged between the end of the sleeve and the side wall of the mould;

At least one first rubber pad is installed inside one end of the sleeve, and the end of the first rubber pad is in contact with the hand hole mold core;

At least one second rubber pad is arranged inside the other end of the sleeve, and the end of the second rubber pad is in contact with the limiting mold core;

a mandrel extending from one side of the mold to the inside of the sleeve;

The spring tightening device is installed on the outside of the mold, and the end of the spring tightening device matches the end of the mandrel.

In the present application, the fitting of the casing can be completed by providing corresponding parts, and at the same time, the pressing of the mandrel can be completed by cooperating with the spring tightening device to ensure the stability of the casing, thereby facilitating the production of the segments.

On the basis of the above technical solution, the embodiment of the present application can also be improved as follows:

Further, the sleeve is a threaded sleeve, and the end of the sleeve matched with the second rubber pad is a threaded end. The beneficial effect of adopting this step is that the subsequent splicing is facilitated by the threaded section.

Further, the mandrel includes:

The arc segment is arranged inside the casing;

The connection section is integrally formed at the end of the arc section, and the connection section passes through the side wall of the mould. The beneficial effect of this step is to ensure the overall stability through the mandrel.

Further, the first rubber pad includes:

a cylindrical section, the cylindrical section is arranged inside the casing;

The step section is located at the end of the cylindrical section, and the end of the step section away from the cylindrical section is in contact with the end face of the hand hole mold core. The beneficial effect of this step is that the step section can ensure tightness.

Further, the second rubber pad includes:

a first cone section, the taper of the first cone section is 3 degrees, and the first cone section is arranged inside the threaded end of the casing;

The second cone section is located outside the first taper, and the taper of the second cone section is 7 degrees, and the second cone section cooperates with the limiting mold core. The beneficial effect of this step is to pass two A tapered section facilitates assembly and ensures tightness.

Further, the limit mold core includes:

The first limiting section, the first limiting section is tapered, and the taper of the first limiting section is 40 degrees, and the end surface of the first limiting section is in contact with the end surface of the second tapered section ;

The second limiting section is arranged outside the first limiting section, and the second limiting section is tapered with a taper of 13 degrees. The beneficial effect of adopting this step is that the subsequent splicing is facilitated by the limiting mold core.

Further, the spring tightening device includes:

A sleeve seat installed on the outside of the mould;

A T-shaped bar is arranged inside the sleeve seat, and the end of the T-shaped bar is in contact with the end of the mandrel;

The telescopic spring is set on the T-shaped bar, and the telescopic spring is located inside the sleeve seat. The beneficial effect of adopting this step is to ensure the tightness of the mandrel through the spring tightening device.

The application also discloses a method for making a segment, comprising the following steps:

S1: Select the aforementioned connection and fastening components;

S2: Concrete pouring is carried out. After the pouring is completed, the mold, mandrel, first rubber pad, second rubber pad, limit mold core and spring clamping device are removed to obtain a shield tunnel segment.

The application also discloses a segment, which is manufactured by the aforementioned manufacturing method.

The application also discloses a method for assembling segments, comprising the following steps:

S1: Select any two prepared shield tunnel segments;

S2: A plastic stopper is set between the two shield tunnel segments described in step S1, one end of the plastic stopper is threadedly connected to the casing of one of the shield tunnel segments, and the other end is connected to the remaining The end faces of the sleeves of one shield tunnel segment are in contact.

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

1. In this application, related connection and fastening components are provided to facilitate subsequent processing into segments with embedded sleeves to achieve subsequent stable assembly.

2. This application is aimed at the cooperation between the limit mold core and the casing to ensure that there will be no slurry leakage when the segment is demoulded, and the positioning size is accurate.

3. When the segments prepared in this application are subsequently assembled, the plastic stopper is threadedly connected with the casing to ensure that the plastic stopper will not be extruded and shifted, and the stability of the entire assembled structure is ensured.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of the structure of the segmental circumferential limiter of a pre-embedded threaded casing described in Embodiment 1 of the present invention;

Fig. 2 is the structural representation of the first rubber pad in Fig. 1;

Fig. 3 is the structural representation of the second rubber pad in Fig. 1;

Fig. 4 is the schematic structural view of the limit mold core in Fig. 1;

Fig. 5 is the structural representation of mandrel in Fig. 1;

Fig. 6 is a schematic structural view of the spring tensioning device in Fig. 1;

7 is a schematic structural view of a method for assembling shield tunnel segments described in Embodiment 4 of the present invention;

Fig. 8 is a schematic structural view of the plastic stopper in Fig. 7;

1-mold; 2-hand hole core; 3-sleeve; 4-limit core; 5-first rubber pad; 6-second rubber pad; 7-mandrel; 8-spring clamping device; 9 - Plastic stoppers;

101 - pouring cavity;

401-the first limit section; 402-the second limit section;

501-cylindrical section; 502-step platform section;

601-the first cone section; 602-the second cone section;

701-arc segment; 702-connection segment;

801-sleeve seat; 802-T type bar; 803-telescopic spring.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and thus should not be construed as limiting the invention.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Example 1:

As shown in Figure 1, the embodiment of the present application discloses a segmental circumferential limiter structure of a pre-embedded threaded casing, that is, the production of the corresponding segment can be completed by using the connecting fastening assembly;

Its specific structure includes:

Mold 1. A pouring cavity 101 is arranged inside the mold 1. The mold is formed by splicing a plurality of templates, which may be arc-shaped, and a cavity structure is formed inside as the pouring cavity 101;

At least one hand hole mold core 2 is installed on the bottom side of the pouring cavity 101. After the hand hole mold core 2 is convenient for pouring, the segment can form the required hand hole;

At least one sleeve 3 is arranged between the side wall of the pouring cavity 101 and the hand hole mold core 2. The sleeve 3 is used as an embedded part of the subsequent segment and used as a connecting part, and materials such as PVC can be used. One end is in contact with the side of the mold 1, and the other end is in contact with the side of the hand hole core 2, wherein the hand hole core 2 facilitates the formation of a smooth cavity for the segment, that is, it can form a bolt lock for the segment when the mold is subsequently removed. tight cavity;

At least one limit core 4 is arranged between the end of the sleeve 3 and the side wall of the mold 1; the limit core 4 and the hand hole core 2 cooperate with each other to complete the limit of the sleeve 3 position, which is convenient for the production of the subsequent segment, and at the same time, the shape formed by the limiting core 4 is included in the subsequent segment, that is, the limiting groove, which is used to place the plastic limiting part during subsequent assembly;

At least one first rubber pad 5 is installed inside one end of the sleeve 3, and the end of the first rubber pad 5 is in contact with the hand hole mold core 2;

At least one second rubber pad 6 is arranged inside the other end of the sleeve 3, and the end of the second rubber pad 6 is in contact with the limiting mold core 4. Two rubber pads are provided in this application , which are respectively arranged at both ends of the casing 3, so as to ensure the sealing performance and avoid slurry leakage on the mating surface, which will affect the product quality;

At least one mandrel 7 extends from one side of the mold 1 to the inside of the sleeve 3, and the mandrel 7 is used to ensure the stability of the subsequent segment casting; the mandrel 7 extends to the inside of the sleeve 3 Cooperate with the hand hole mold core 2 to ensure the stability of the casing 3;

At least one spring tightening device 8 is installed on the outside of the mold 1, and the end of the spring tightening device 8 is matched with the end of the mandrel 7; Tighten one end of the mandrel 7 to ensure the stability of the casing 3 and facilitate the production of subsequent segments.

The numbers of the hand hole mold core, the sleeve, the limit mold core, the first rubber pad, the second rubber pad, the mandrel and the spring tightening device in the present application are the same, and may be one or more.

In one embodiment, the sleeve 3 is a threaded sleeve, and the end of the sleeve 3 matched with the second rubber pad 6 is a threaded end, which is convenient for the splicing of subsequent segments when used;

The sleeve 3 is an arc-shaped tube, and may also be in other shapes, as long as the subsequent connection is satisfied.

In one embodiment, as shown in Figure 5, the mandrel 7 includes:

The arc segment 701 is arranged inside the casing 3;

The connecting section 702 is integrally formed at the end of the arc section 701, and the connecting section 702 passes through the side wall of the mold 1; the mandrel 7 in this application mainly plays a supporting role, and its arc The segment 701 cooperates with the arc-shaped sleeve 3 to form a support, while the connecting segment 702 facilitates the subsequent assembly and tightening and the removal of the mandrel 7 after the segment is formed.

Wherein, as shown in Figure 2, the first rubber pad 5 includes:

A cylindrical section 501, the cylindrical section 501 is arranged inside the casing 3;

The step section 502 is located at the end of the cylindrical section 501, and the end of the step section 502 away from the cylindrical section 501 is in contact with the end surface of the hand hole core 2; the first rubber pad in this application 5 is used to close the connection between the casing 3 and the hand hole mold core 2, specifically through the step section 502. The diameter of the step section 502 gradually increases outward from the connection with the cylindrical section 501, In this way, the sealing is completed and the phenomenon of slurry leakage is avoided.

Wherein, as shown in Figure 3, the second rubber pad 6 includes:

The first cone section 601, the taper of the first cone section 601 is 3 degrees, and the first cone section 601 is arranged inside the threaded end of the casing 3;

The second cone section 602 is located outside the first taper 601, and the taper of the second cone section 602 is 7 degrees, and the second cone section 602 cooperates with the limiting mold core 4; The second rubber pad 6 is designed to be divided into two cone segments, wherein the size of the second cone segment 602 is larger than the size of the first cone segment 601 , so as to complete the sealing of the threaded end of the casing 3 .

Wherein, as shown in Figure 4, the limit mold core 4 includes:

The first limiting section 401, the first limiting section 401 is tapered, and the taper of the first limiting section 401 is 40 degrees, the end surface of the first limiting section 401 is in contact with the second cone The end faces of the segments 602 are in contact;

The second limiting section 402 is arranged on the outside of the first limiting section 401, and the second limiting section 402 is tapered with a taper of 13 degrees to ensure that the segment will not be damaged when demoulding. In the present application, the position-limiting core 4 is designed so that it can better contact the end of the sleeve 3 to ensure the stability of the entire sleeve.

In one embodiment, as shown in FIG. 6, the spring tightening device 8 includes:

The sleeve seat 801 is installed on the outside of the mold 1;

A T-shaped bar 802 is arranged inside the sleeve seat 801, and the end of the T-shaped bar 802 is in contact with the end of the mandrel 7;

The telescopic spring 803 is set on the T-shaped bar 802, and the telescopic spring 803 is located inside the sleeve seat 801; the application designs the spring tightening device 8, and uses the telescopic spring 803 to drive the T-shaped bar 802 to move , so that the T-shaped bar 802 is against the end of the mandrel 7; wherein the sleeve seat 801 is provided with a sleeve segment, and a cavity is provided inside it for placing the relevant telescopic spring 803, while the T-shaped bar 802 is movable Passing through the sleeve section, driven by the telescopic spring 803, the mandrel is compressed, so that the mandrel can be stabilized, which facilitates the production of subsequent segments.

Example 2:

The embodiment of the present application is based on embodiment 1, and discloses a method for making a segment, including the following steps:

S1: select the connection and fastening assembly described in the specific embodiment 1;

S2: Concrete pouring is carried out, and after the pouring is completed, the mold, the mandrel, the first rubber pad, the second rubber pad and the spring clamping device are removed to obtain the shield tunnel segment.

Example 3:

The embodiment of the present application is based on Example 2, and discloses a segment, which is manufactured by the manufacturing method of Example 2. The shield tunnel segment includes a limiter formed by a pouring block, a sleeve and a limiter core. groove.

Example 4:

The embodiment of the present application is based on embodiment 3, disclosing a method for assembling segments, comprising the following steps:

S1: Select any two shield tunnel segments in Embodiment 3;

S2: A plastic stopper is set between the two shield tunnel segments described in step S1, one end of the plastic stopper is threadedly connected to the casing of one of the shield tunnel segments, and the other end is connected to the remaining The casing end faces of one shield tunnel segment are in contact, and at the same time, the end faces of the two limiting grooves are in contact to form a cavity, and the limiting mold core is located inside the cavity, as shown in Figures 7 and 8 .

In this application, when the shield tunnel segments are spliced, a plastic stopper is used for splicing. The plastic stopper specifically includes a threaded section and a splicing section, which are integrally formed. The threaded section is connected to the thread of the casing, and The end face of the splicing section is in contact with the casing to complete the limit.

In the description of the invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention.

Claims (10)

1. The utility model provides a pre-buried threaded sleeve's section of jurisdiction circumferential spacing spare structure which characterized in that includes:

the die is internally provided with a pouring cavity;

at least one hand hole mold core arranged at the bottom side of the pouring cavity;

the sleeve is arranged between the side wall of the pouring cavity and the hand hole mold core;

the at least one limiting mold core is arranged between the end part of the sleeve and the side wall of the mold;

at least one first rubber pad, which is arranged in one end of the sleeve, and the end part of the first rubber pad is contacted with the hand hole mold core;

the second rubber pad is arranged in the other end of the sleeve, and the end part of the second rubber pad is in contact with the limit mold core;

a core rod extending from one side of the die to the inside of the sleeve;

and the spring propping device is arranged at the outer side of the die, and the end part of the spring propping device is matched with the end part of the core rod.

2. The segment circumferential spacing member of claim 1, wherein said sleeve is a threaded sleeve and an end of said sleeve that mates with said second rubber pad is a threaded end.

3. The segment circumferential spacing member arrangement of claim 2, wherein said mandrel comprises:

the arc-shaped section is arranged inside the sleeve;

and the connecting section is integrally formed at the end part of the arc-shaped section and penetrates through the side wall of the die.

4. The segment circumferential spacing member construction of claim 3 wherein said first rubber pad comprises:

the cylindrical section is arranged inside the sleeve;

the ladder bench is positioned at the end part of the cylindrical section, and one end, far away from the cylindrical section, of the ladder bench is contacted with the end face of the hand hole mold core.

5. The segment circumferential spacing member arrangement of claim 4, wherein said second rubber pad comprises:

the first cone section has a taper of 3 degrees and is arranged inside the threaded end of the sleeve;

the second cone section is positioned at the outer side of the first taper, the taper of the second cone section is 7 degrees, and the second cone section is matched with the limiting mold core.

6. The segment circumferential spacing member construction of claim 5, wherein said spacing mold core comprises:

the first limiting section is conical, the taper of the first limiting section is 40 degrees, and the end face of the first limiting section is in contact with the end face of the second conical section;

the second limiting section is arranged outside the first limiting section, and the second limiting section is in a conical shape with a conical degree of 13 degrees.

7. The segment circumferential spacing member arrangement of claim 1, wherein said spring biasing means comprises:

the sleeve seat is arranged at the outer side of the die;

the T-shaped rod is arranged in the sleeve seat, and the end part of the T-shaped rod is contacted with the end part of the core rod;

and the telescopic spring is sleeved on the T-shaped rod and is positioned in the sleeve seat.

8. The manufacturing method of the duct piece is characterized by comprising the following steps of:

s1: selecting a segment circumferential limiting member structure according to any one of claims 1-8;

s2: and (3) pouring concrete, and after pouring, removing the mould, the core rod, the first rubber pad, the second rubber pad, the spring jacking device and the limiting mould core to obtain the shield tunnel duct piece.

9. A segment made by the method of claim 8.

10. The segment assembling method is characterized by comprising the following steps of:

s1: selecting any two shield tunnel segments prepared in claim 9;

s2: and (2) arranging a plastic limiting piece between the shield tunnel segments in the two steps S1, wherein one end of the plastic limiting piece is in threaded connection with one sleeve of one shield tunnel segment, and the other end of the plastic limiting piece is in contact with the end face of the sleeve of the other shield tunnel segment.

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