CN211924174U - Reinforcement construction structure of connection channel between shield tunnel - Google Patents
Reinforcement construction structure of connection channel between shield tunnel Download PDFInfo
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- CN211924174U CN211924174U CN201922045827.5U CN201922045827U CN211924174U CN 211924174 U CN211924174 U CN 211924174U CN 201922045827 U CN201922045827 U CN 201922045827U CN 211924174 U CN211924174 U CN 211924174U
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- contact passageway
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Abstract
The utility model discloses a reinforcement construction structure of contact passageway between shield tunnel relates to two parallel distribution's shield tunnel, and this reinforced structure is including arranging two pull rod between the shield tunnel and arranging support in the interim in the shield tunnel, the position of arranging of pull rod is corresponding to the design position of treating construction contact passageway, the pull rod is arranged the regional section shape that encloses and closes and is corresponding to treat the section shape of construction contact passageway. The utility model has the advantages that: consolidate construction simple structure connects through setting up a plurality of pull rods between two parallel shield tunnels, utilizes the self-balancing principle of system internal force, can effectively avoid mechanical method construction contact passageway in-process to cause the influence to shield tunnel flexural deformation and cross section deformation to reducible contact passageway construction simultaneously is applicable to parallel shield tunnel clear distance and is not more than 15 m's shield tunnel contact passageway construction to the disturbance of soil body and the influence on upper portion earth's surface on every side.
Description
Technical Field
The utility model belongs to the technical field of the shield tunnel, concretely relates to reinforcement construction structure of contact passageway between shield tunnel.
Background
Subway design specifications specify, contact channel. Two single line interval shield tunnels should establish the contact passageway, and the distance between two adjacent contacts should not be greater than 600 m. The subway section shield tunnel is generally more than 1000m, so that the communication channel is an indispensable accessory structure of two single-line subway shield tunnels. The mine method is commonly adopted at home and abroad to construct the connecting channel, the freezing method is adopted in the construction method to reinforce the area needing to be excavated, and the frost heaving of the soil body during the freezing reinforcement of the soil body has an influence on the constructed shield tunnel, as shown in figure 1.
In order to avoid collapse accidents in the construction of the communication channel, the mechanical construction (namely, a pipe jacking method and a shield method) of the communication channel is developed at home and abroad in recent years. However, when the interconnection passage is constructed by a mechanical method, the thrust force of the construction equipment easily causes the shield tunnel at the initiating end to horizontally displace and deflect, and when the construction equipment approaches the shield tunnel at the receiving end, the thrust force of the cutter head also easily causes the shield tunnel at the receiving end to horizontally displace and deflect, as shown in fig. 2.
In order to reduce the overlarge horizontal displacement of the built shield tunnel caused in the construction process of the mechanical method connecting channel, the stratum around the built shield tunnel near the connecting channel is usually reinforced, the cost is high, the construction difficulty is high, the construction period is long, and the reinforcing effect is difficult to guarantee.
Disclosure of Invention
The utility model aims at providing a weak point according to above-mentioned prior art between the shield tunnel consolidates construction structures of contact passageway, should consolidate construction structures and connect through setting up a plurality of pull rods between two parallel shield tunnels, utilize the self-balancing principle of system internal force to avoid shield structure entry driving machine to cause shield tunnel flexural deformation and cross section deformation when tunnelling construction contact passageway, reduce to shield tunnel and the deformation influence of the soil body on every side.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
the utility model provides a reinforced construction structure of contact passageway between shield tunnel, relates to two parallel distribution's shield tunnel, its characterized in that reinforced construction structure is including arranging two pull rod between the shield tunnel and arranging in the interim interior support in the shield tunnel, the position of arranging of pull rod corresponds to the design position of waiting to be under construction contact passageway, the regional section shape that the pull rod was arranged and is enclosed corresponds to the section shape of waiting to be under construction contact passageway.
The pull rod is formed by extending a plurality of steel pipe sections through threads, and the end part of the pull rod penetrates through the pipe sections on the shield tunnel and is fixed through bolts.
The arrangement position of the pull rod is located between 30cm and 50cm outside the designed position of the communication channel to be constructed.
The temporary inner support positioned in the shield tunnel is connected and fixed with the pull rod.
A construction method of a reinforced construction structure of a connection channel between any shield tunnels is characterized by comprising the following steps: arranging temporary inner supports in the two shield tunnels respectively to support the shield tunnels; arranging a pull rod between the two shield tunnels to connect the two shield tunnels together, wherein the section shape of an area enclosed by the arrangement of the pull rod corresponds to the section shape of the communication channel to be constructed; and arranging a shield tunneling machine or a pipe jacking machine in one of the shield tunnels, tunneling the shield tunneling machine or the pipe jacking machine along the area enclosed by the pull rod and synchronously installing the pipe piece of the contact channel to be constructed until the shield tunneling machine or the pipe jacking machine tunnels into the other shield tunnel, and completing construction of the contact channel.
The pull rod is composed of a plurality of steel pipe sections, through holes for the steel pipe sections to penetrate through are formed in pipe pieces of the shield tunnels, a first section of the steel pipe section is pressed into a soil body through the through holes in one of the shield tunnels, when the first section of the steel pipe section is pressed into the tail end, the tail end of the first section of the steel pipe section is in threaded connection with a second section of the steel pipe section and is continuously pressed into the soil body, the operation is repeated in such a way until the front end of the first section of the steel pipe section reaches the other through hole in the shield tunnel, and then bolts are used for respectively fixing two ends of the pull rod with the pipe pieces and the temporary inner supports through bolts.
And after the construction of the communication channel is finished, the temporary inner support in the shield tunnel is removed, and the pull rod is left in the soil body between the two shield tunnels.
The utility model has the advantages that: the reinforced construction structure is simple, a plurality of pull rods are arranged between two parallel shield tunnels for connection, the system internal force self-balancing principle is utilized, the influence of the shield tunneling machine on the deflection deformation and the cross section deformation of the shield tunnels in the construction contact channel process can be effectively avoided, the influence of the contact channel construction on the disturbance of the surrounding soil body and the upper earth surface can be reduced, and the reinforced construction structure is suitable for the shield tunnel contact channel construction with the parallel shield tunnels with clear distance not larger than 15 m.
Drawings
FIG. 1 is a diagram illustrating the expansion and freezing effects on an established shield tunnel when a freezing method is used to freeze soil in an interconnection channel region to be constructed in the prior art;
FIG. 2 is a diagram illustrating the deformation influence on an established shield tunnel generated when a shield tunneling machine tunnels without adopting a reinforcing structure in the prior art;
fig. 3 is a schematic view of the arrangement of the tie rods between adjacent shield tunnels according to the present invention;
fig. 4 is a schematic diagram of the present invention, in which temporary inner supports are respectively disposed in each shield tunnel;
FIG. 5 is a schematic view of the freezing reinforcement in the peripheral soil body of the area enclosed by the pull rod of the present invention;
fig. 6 is the schematic diagram of the connection passage for the tunneling construction of the middle shield tunneling machine in the area enclosed by the pull rod.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example with reference to the accompanying drawings, for the understanding of those skilled in the art:
referring to fig. 1-6, the labels 1-9 in the drawings are: the device comprises a shield tunnel 1, a communication channel 2, a communication channel heading machine 3, a pull rod 4, a steel pipe section 5, bolts 6, a temporary inner support 7 and a shield heading machine or a pipe jacking machine 8.
Example (b): as shown in fig. 3 to 6, the present embodiment specifically relates to a reinforced construction structure of a communication channel between shield tunnels and a construction method thereof, where the reinforced construction structure includes a plurality of pull rods 4 arranged between two constructed shield tunnels 1, temporary inner supports 7 arranged in each shield tunnel 1, and freezing holes arranged in a peripheral soil body of an area surrounded by the pull rods 4, and the two shield tunnels 1 can be effectively connected by the arrangement of the pull rods 4 to prevent deformation influence on the shield tunnels 1 during mechanical construction.
As shown in fig. 3 to 6, two constructed shield tunnels 1 are distributed in parallel in the soil body, and the clear distance between the two shield tunnels 1 is not greater than 15m, in this embodiment, a communication channel 2 needs to be constructed between the two constructed shield tunnels 1, and in order to avoid deformation of the shield tunnels 1 during the construction process, a corresponding reinforcing construction structure needs to be arranged between the two shield tunnels 1.
The pull rods 4 are arranged between the two shield tunnels 1 to connect the two shield tunnels together, the cross section of the area surrounded by the pull rods 4 corresponds to the cross section of the communication channel 2 to be constructed, and the cross section of the area surrounded by the pull rods 4 is slightly larger than the cross section of the communication channel 2 to be constructed, namely, each pull rod 4 is at least 30cm away from the communication channel 2 to be constructed and can be 30-50cm away from the communication channel 2 to be constructed. It should be noted that the tie rod 4 in this embodiment is specifically formed by connecting a plurality of steel pipe segments 5 with a length of 3-5m, and both ends of the tie rod 4 connected into a whole respectively penetrate through the segments on the shield tunnel 1 and are fixed on the segments by bolts 6. Under the limit fixing of the pull rod 4, the shield tunnels 1 on two sides are limited to deform outwards.
The shield tunnel 1 is also internally provided with temporary inner supports 7, the temporary inner supports 7 respectively support the top surface, the bottom surface and two side surfaces of the shield tunnel 1, and the temporary inner supports 7 are fixedly connected with the end parts of the pull rods 4 penetrating into the shield tunnel 1 so as to be connected with the pull rods 4 into a whole.
As shown in fig. 3 to 6, the method for reinforcing a communication channel between shield tunnels in this embodiment specifically includes the following steps:
(1) determining the position of a communication channel 2 to be constructed between two existing shield tunnels 1;
(2) arranging temporary inner supports 7 in corresponding areas in the shield tunnel 1 according to the design position of the communication channel 2 to be constructed, wherein the temporary inner supports 7 respectively support the top surface, the bottom surface and two side wall surfaces of the shield tunnel 1 so as to effectively support the inner wall of the shield tunnel 1;
(3) a plurality of through holes for the pull rods 4 to penetrate through are formed in the shield tunnel 1 at intervals corresponding to the region of the communication channel 2 to be constructed, the pull rods 4 are sequentially pressed into the through holes in the shield tunnel 1 on the other side in the through holes in the shield tunnel 1 on one side, and the specific installation method of the pull rods 4 comprises the following steps: taking any through hole as an example, in the shield tunnel 1 at one side, pressing a first section of steel pipe section 5 of a pull rod 4 into a soil body through the through hole, when the first section of steel pipe section 5 is pressed into the tail end, lengthening the tail end of the first section of steel pipe section 5 in a threaded connection mode, namely, connecting the front end of a second section of steel pipe section 5 to the tail end of the first section of steel pipe section 5 in a threaded manner, then continuing to perform jacking operation, pressing the second section of steel pipe section 5 into the tail end, continuing to lengthen the second section of steel pipe section 5, repeating the steps until the front end of the first section of steel pipe section 5 reaches the shield tunnel 1 at the other side and penetrates through the through hole in the pipe sheet, and then respectively fixing two end parts of the pull rod 4 by bolts 6; according to the method, the installation and fixation of the pull rods 4 are sequentially completed, so that a circle of enclosure structure formed by enclosing the pull rods 4 is formed in the peripheral area of the communication channel 2 to be constructed;
(4) after the construction of the temporary inner support 7 and each pull rod 4 is completed, the temporary inner support 7 and the pull rod 7 are fixedly connected together, so that an integral supporting structure is formed;
(5) moving a shield tunneling machine or a pipe jacking machine 8 in a shield tunnel 1 to a corresponding area of an interconnection channel 2 to be constructed, firstly breaking a duct piece at the interconnection channel 2, then advancing the shield tunneling machine or the pipe jacking machine 8 forwards, and simultaneously laying the duct piece of the interconnection channel 2 until the duct piece is advanced into the shield tunnel 1 at the other side, thereby completing the construction of the interconnection channel 2; it should be noted that the size of the shield tunneling machine or the pipe jacking machine 8 is smaller than that of the shield tunnel 1, so that the shield tunneling machine or the pipe jacking machine can move and turn freely in the shield tunnel 1; in addition, the shield tunnel 1 is correspondingly limited and supported by the pull rod 4 and the temporary inner support 7, so that the shield tunnel 1 cannot deform in the tunneling process of a shield tunneling machine or a pipe jacking machine 8, and the structural stability of the shield tunnel 1 is ensured;
(6) after the construction of the connecting channel 2 is completed, the temporary inner supports 7 in the two shield tunnels 1 are removed, and the pull rods 4 are permanently left in the soil body and are not removed.
The beneficial effect of this embodiment is: the reinforced construction structure is simple, a plurality of pull rods are arranged between two parallel shield tunnels for connection, the influence on the deflection deformation and the cross section deformation of the shield tunnels caused by the shield tunneling machine in the construction connection channel process can be effectively avoided, the influence on the disturbance of the surrounding soil body and the upper earth surface caused by the connection channel construction can be reduced, and the reinforced construction structure is suitable for the shield tunnel connection channel construction with the parallel shield tunnel clear distance not larger than 15 m.
Claims (4)
1. The utility model provides a reinforced construction structure of contact passageway between shield tunnel, relates to two parallel distribution's shield tunnel, its characterized in that reinforced construction structure is including arranging two pull rod between the shield tunnel and arranging in the interim interior support in the shield tunnel, the position of arranging of pull rod corresponds to the design position of waiting to be under construction contact passageway, the regional section shape that the pull rod was arranged and is enclosed corresponds to the section shape of waiting to be under construction contact passageway.
2. The reinforced construction structure of the communication channel between the shield tunnels according to claim 1, wherein the pull rod is composed of a plurality of steel pipe sections which are extended by screw threads, and the end of the pull rod penetrates through the pipe sections on the shield tunnel and is fixed by bolts.
3. The reinforced construction structure of the communication passage between the shield tunnels according to claim 1, wherein the arrangement position of the tie rod is between 30cm and 50cm outside the design position of the communication passage to be constructed.
4. The reinforced construction structure of the communication passage between shield tunnels according to claim 2, wherein the temporary inner support in the shield tunnel is fixedly connected with the pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922045827.5U CN211924174U (en) | 2019-11-25 | 2019-11-25 | Reinforcement construction structure of connection channel between shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922045827.5U CN211924174U (en) | 2019-11-25 | 2019-11-25 | Reinforcement construction structure of connection channel between shield tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN211924174U true CN211924174U (en) | 2020-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922045827.5U Active CN211924174U (en) | 2019-11-25 | 2019-11-25 | Reinforcement construction structure of connection channel between shield tunnel |
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| Country | Link |
|---|---|
| CN (1) | CN211924174U (en) |
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2019
- 2019-11-25 CN CN201922045827.5U patent/CN211924174U/en active Active
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