WO2020056794A1

WO2020056794A1 - Shield-machine empty-pushing stepping apparatus

Info

Publication number: WO2020056794A1
Application number: PCT/CN2018/108910
Authority: WO
Inventors: 檀俊坤; 乔世范; 刘日彤; 张细宝; 叶明勇; 徐平; 胡如成; 蔡子勇; 向南
Original assignee: 中南大学; 中铁五局集团电务工程有限责任公司
Priority date: 2018-09-21
Filing date: 2018-09-30
Publication date: 2020-03-26
Also published as: CN109026036B; CN109026036A; LU101102B1

Abstract

A shield-machine empty-pushing stepping apparatus, comprising a counter-force assembly (2) provided on a shield-machine guiding table (1) and a force transferring piece (3), wherein the shield-machine guiding table (1) is provided with two guide rails (1.1); multiple groups of counter-force holes (1.2) are provided between the two guide rails (1.1); the counter-force assembly (2) comprises at least one counter-force single piece (2a); the counter-force single piece (2a) comprises a positioning bottom plate (2.1), a positioning top plate (2.2), and at least one supporting leg (2.3); the supporting leg (2.3) is vertically inserted into the counter-force hole (1.2); the interior of the supporting leg (2.3) is provided with a hydraulic chamber (2.3a); the bottom of the supporting leg (2.3) is provided with a force transferring rod (2.4) with one end connected with the hydraulic chamber (2.3a); the other end of the force transferring rod (2.4) is connected with a pressure bearing plate (2.5); the force transferring piece (3) is mounted between the positioning bottom plate (2.1) and the positioning top plate (2.2); one side of the force transferring piece (3) that is far away from the supporting leg (2.3) is connected with a thrust means (4.1); when the force transferring piece (3) applies a counter force generated by the thrust means (4.1) to the supporting leg (2.3) in the apparatus, the counter force is transferred to the pressure bearing plate (2.5) by means of an hydraulic oil and the force transferring rod (2.4) so as to be applied into the counter-force hole (1.2).

Description

Air-driven stepping device for shield machine

Technical field

The invention relates to the technical field of tunnel engineering, and in particular, to an air-propelled stepping device for a shield machine.

Background technique

With the development of the city, more and more subways are being constructed, and the construction of urban subways is usually a shallow-buried and underground tunnel. Often, the route that the tunnel passes through is an urban prosperous area. The surface is densely populated and traffic is heavy. In order to reduce the impact of the tunnel construction on the ground and control the surface settlement, the shield tunnel method is usually used to construct the subway tunnel. However, when encountering some complex geology, other construction methods need to be used to construct the tunnel. In the case of a tunnel, the shield tunneling machine needs to be air-pushed through the excavated tunnel section.

Chinese patent CN106150511B discloses a construction method of a shield tunneling type air pushing through a ground fissure concealed tunnel, which includes the following steps: 1. Construction of a concrete guide platform in a ground fissure concealed tunnel; 2. Construction of guide rails and reaction frames; 3. Shield The machine is pushed forward as a whole: move the shield machine forward and support the shield host on two guide rails, and then push the shield cylinder and the reaction force frame together to push it forward until it is pushed in place; During the pushing process, the shield segment assembly machine using the shield machine is used to install multiple shield segments on the concrete guide from the back to the front. The shield segments are the bottom segments and are located on the rear side of the propelling cylinder. The oil cylinder is supported on the reaction force frame through the bottom tube segment. A plurality of bottom tube segments form a panning channel for the rear supporting trolley of the shield machine to move forward. The method uses the back arch structure in the tunnel to complete the shield emptying. Pushing through the ground fissure tunnel construction process. However, the guide platform of shield machine is usually made of reinforced concrete. The thickness of the guide platform and the amount of reinforcement in the steel bar are determined by the height of the shield machine and the reaction force required for the shield machine. When the thickness of the concrete guide platform must be reduced in the design, it is easy to cause the thickness of the guide platform to be small, the depth of the reaction force hole provided on the guide platform is shallow, the contact area between the reaction force hole and the reaction force frame is small, and the stress concentration is large, which is easy to the periphery of the hole. The concrete of the guide platform causes damage, and the insufficient reaction force makes it difficult to propel the shield machine forward. When the shield machine space is sufficient in the air-propelled step, the concrete guide platform is made thick to ensure that the shield machine is given sufficient reaction force and to avoid or reduce it. The concrete guide platform is damaged, however, this will inevitably greatly increase the amount of concrete and steel bars, and the economic cost will increase.

Summary of the Invention

The purpose of the present invention is to provide an air-stepping device for a shield machine to solve the problems raised in the background art. Construction method with low construction cost and high-speed shield tunneling by air tunneling through a tunnel.

In order to achieve the above object, the present invention provides an air-gating stepping device for a shield machine, which includes a shield machine guide, a reaction force component, and a force transmission piece. The shield machine guide is provided with a shield machine direction. The two forward guide rails are provided with multiple sets of reaction force holes spaced apart along the length direction between the two guide rails;

The reaction force component includes at least one reaction force piece, and the reaction force piece includes a positioning bottom plate, a positioning top plate, and at least one leg, and the positioning bottom plate is disposed on the shield machine guide platform, and the positioning top plate It is located above the positioning floor, the legs are inserted vertically in the reaction force hole, and the leg closest to the shield machine is connected to both the positioning floor and the positioning roof. There is a hydraulic chamber. The hydraulic chamber is provided with hydraulic oil for transmitting pressure. The bottom of the leg is provided with a mounting groove on the side far from the shield machine. One end of the mounting groove is connected with the mounting groove. A power transmission rod connected to the hydraulic chamber, a pressure bearing plate is connected to the other end of the power transmission rod, and an outer surface of the pressure bearing plate is covered with a gasket, and the power transmission rod and the pressure bearing plate are both located at Inside the reaction force hole;

The power transmission plate is fixed between the positioning bottom plate and the positioning top plate by a plurality of fixing members, and a lower surface of the power transmission plate is in contact with the two guide rails. The thrust device at the tail of the shield machine is connected.

Further, the reaction force component includes two reaction force single pieces arranged side by side, and each of the reaction force single pieces includes a leg, and the leg penetrates the positioning bottom plate and the positioning top plate up and down.

Further, the number of the reaction force holes in each set of reaction force holes is two, and the distance between the two reaction force holes is adapted to the distance between the two reaction force pieces.

Further, the reaction force component includes two reaction force single pieces arranged side by side, each of the reaction force single pieces includes two legs, and the two legs are vertically spaced along the advancement direction of the shield machine, The legs close to the shield machine pass through the positioning bottom plate and the positioning top plate up and down, and the hydraulic chambers of the two legs are connected by hydraulic pipes; the reaction force single piece further includes two telescopic members, two The connecting piece is used to connect the two legs and is connected to the positioning bottom plate and the positioning top plate, respectively.

Further, the telescopic member includes a member body and an inner sleeve rod. One end of the member body for connecting with the positioning bottom plate or the positioning top plate is a U-shaped connection portion, and the other end of the component body is hollow. A plurality of first through holes are provided on the outer sleeve and spaced apart along its length direction, and a plurality of second through holes adapted to the first through holes are provided on the inner sleeve; An inner sleeve rod is inserted in the outer sleeve rod, and the inner rod and the outer sleeve rod are fixed by a plug.

Further, the connecting portion, the positioning top plate, and the positioning bottom plate are all provided with insertion holes through which the legs penetrate up and down, and the legs are in interference fit with the insertion holes.

Further, the number of the reaction force holes in each group of reaction force holes is four, and the distance between the four reaction force holes and the distance between the four legs of the reaction force assembly is four. Match.

Further, a mounting ear is provided on the force transmission sheet and on a side connected to the thrust device, a mounting ear is provided on the mounting ear, and an end of the thrust device is provided to fit the mounting ear. When the thrust device is contracted, the reaction force component and the force transmitting sheet are advanced.

Further, the force transmission sheet is a tunnel assembled segment, the thickness of the tunnel assembled segment is 40-50 cm, and the shield tunnel segment is made of C50 concrete.

Further, the reaction force assembly further includes a hydraulic pressure device for adjusting the oil pressure in the hydraulic chamber.

Compared with the prior art, the present invention has the following beneficial effects:

(1) An air-stepping device for a shield machine according to the present invention includes a shield machine guide, a reaction force component, and a force transmission piece. The shield machine guide is provided with two guide rails, and a space between the two guide rails is provided. There are multiple sets of reaction force holes; the reaction force assembly includes at least one reaction force piece, and each reaction force piece includes a positioning bottom plate, a positioning top plate and at least one leg, and the legs are vertically inserted in the reaction force hole. There is a hydraulic chamber in the leg, a power transmission rod connected to the hydraulic chamber is provided at the bottom of the leg, and a pressure-bearing plate is connected to the other end of the power transmission rod; When the force is applied, the force on the outriggers is evenly distributed to the outriggers of the facet to avoid excessive stress on the single reaction force hole; the outriggers and the reaction force holes that are detachably inserted in the reaction force holes cannot be formed vertically. The lever can effectively avoid the concentration of stress on the upper and lower parts of the guide table and be broken.

(2) The reaction force component of the present invention includes two reaction force pieces arranged side by side, each reaction force piece includes two legs, and the two legs are vertically spaced along the advancement direction of the shield machine, close to the shield The legs of the construction machine penetrate the positioning floor and the positioning top plate up and down, and the hydraulic chambers of the two legs are connected by hydraulic pipes; the reaction force single piece also includes two telescopic members that are respectively connected to the positioning bottom plate and the positioning top plate. Two telescopic members are used to connect two legs; the structure is provided with multiple legs, and the legs are provided with hydraulic penetrations, so that each leg is evenly stressed, the utilization of the legs is increased, and the counterforce is reduced against the shield Destruction of machine concrete guide.

(3) According to the present invention, the reaction force device is fixedly connected with the assembled pipe segment of the tunnel, and the line contact between the conventional concrete guide and the leg is adjusted to surface contact, so as to increase the force receiving area of the concrete and enhance the horizontal reaction force provided by the concrete ; The bottom of the leg is provided with a power transmission rod connected to the hydraulic chamber at one end, and a pressure bearing plate is connected to the other end of the power transmission rod, and the power transmission rod and the pressure bearing plate are located in the reaction force hole. The size of the force hole does not need to be strictly matched with the outriggers, which reduces the work accuracy and facilitates construction.

(4) In the present invention, a rubber gasket is provided on the outer side of the pressure bearing plate. The rubber gasket can fill uneven parts of the reaction force hole, increase the contact area, and reduce concentrated stress.

(5) The telescopic component in the present invention includes a component body and an inner sleeve rod, and one end of the component body for connecting with the positioning bottom plate or the positioning top plate is a U-shaped connecting portion. The other end is a hollow outer sleeve. A plurality of first through holes are provided on the outer sleeve and spaced along its length. The inner sleeve is provided with a plurality of second through holes adapted to the first through holes. Hole; the inner sleeve rod is inserted in the outer sleeve rod, and the inner rod and the outer sleeve rod are fixed by a connector; in this structural setting, by adjusting a telescopic member, a shield with various steps The advancement of the machine is beneficial to reducing the construction cost.

(6) The air-driven stepping device of the shield machine of the present invention has a simple operation method, which can greatly reduce the thickness of the guide table, reduce the amount of concrete and reinforcement used, reduce the amount of labor, and reduce the economic cost compared with the existing devices. Conducive to speeding up construction.

In addition to the objects, features, and advantages described above, the present invention has other objects, features, and advantages. Hereinafter, the present invention will be described in further detail with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the descriptions thereof are used to explain the present invention, and do not constitute an improper limitation on the present invention. In the drawings:

FIG. 1 is a schematic diagram of a three-dimensional structure of an air push stepping device for a shield machine of the present invention;

FIG. 2 is a partially enlarged structure diagram of the air-driven stepping device of the shield machine in FIG. 1; FIG.

3 is a schematic structural view of a right-side view of an air-stepping device of a shield machine in FIG. 1;

4 is a schematic diagram of a mounting structure of the reaction force component in FIG. 1;

FIG. 5 is an enlarged structural schematic view of A of the reaction force component in FIG. 1; FIG.

6 is a schematic structural diagram of a reaction force component in FIG. 1;

7 is a schematic cross-sectional structure diagram of the reaction force component in FIG. 1;

FIG. 8 is a schematic perspective structural view of another air-stepping device for a shield machine of the present invention; FIG.

Among them, 1. Shield machine guide, 1.1, guide rail, 1.2, reaction force hole, 2, reaction force component, 2a, reaction force single piece, 2.1, positioning bottom plate, 2.2, positioning top plate, 2.3, outrigger, 2.3a Hydraulic room, 2.4, Power transmission rod, 2.5, Pressure plate, 2.6, Gasket, 2.7, Fixture, 2.8, Hydraulic tube, 2.9, Telescopic component, 2.9a, Component body, 2.9b, Inner sleeve rod, 2.10 , Pressurization device, 3, force transmission piece, 3.1, mounting ears, 4, shield machine, 4.1, thrust device.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in a variety of different ways defined and covered by the claims.

Example 1

Referring to FIGS. 1 to 7, an air-propelled stepping device of a shield machine according to the present invention includes a reaction force component 2 and a force transmission plate 3 provided on a shield machine guide table 1. The two guide rails 1.1 that the shield machine 4 advances forward are provided with a plurality of sets of reaction force holes 1.2 spaced apart along the length direction between the two guide rails.

The reaction force component includes two reaction force pieces 2a arranged side by side. The reaction force piece includes two legs 2.3 and a hydraulic pipe 2.8. The two legs are vertically spaced in the reaction force hole along the advance direction of the shield machine. Inside, the legs close to the shield machine penetrate the positioning floor and the positioning top plate up and down, and the hydraulic chambers of the two legs are connected by a hydraulic pipe 2.8; the reaction force single piece also includes a telescopic member 2.9 for connecting the two legs , The number of telescopic members is two, which are respectively connected to the positioning bottom plate and the positioning top plate. The telescopic component includes a component body 2.9a and an inner sleeve rod 2.9b. One end of the component body for connecting with the positioning bottom plate or the positioning top plate is a U-shaped connection portion, and the legs close to the shield machine also pass through the connection portion up and down; The other end of the component body is a hollow outer sleeve. A plurality of first through holes are provided on the outer sleeve and spaced along its length. The inner sleeve is provided with a plurality of second through holes adapted to the first through holes. The sleeve rod is inserted into the outer sleeve rod, and the inner rod and the outer sleeve rod are fixed by a connector. The structure is provided with multiple legs, and the hydraulic chambers in the two legs of the same reaction force single piece communicate with each other. When the air-thrusting stepping device acts as a reaction force, the force transmission plate passes the thrust force exerted by the thrust device on it. The connecting part is transmitted to each leg, and the hydraulic oil in the leg spreads the pressure on the pressure bearing plate at the bottom of the leg at the same time, so that each leg is uniformly stressed, and the reaction force hole that cooperates with the leg is subject to The force is evenly divided to reduce the damage of the counterforce to the concrete guide platform of the shield machine and reduce the propulsion cost.

In this embodiment, the connecting portion, the positioning top plate, and the positioning bottom plate are provided with insertion holes through which the legs pass up and down; the number of reaction force holes in each group of reaction force holes is four, and between the four reaction force holes The distance is adapted to the distance between the four legs in the reaction force assembly.

In this embodiment, the power transmission plate is fixed between the positioning bottom plate and the positioning top plate by a plurality of fixing members 2.7, and the lower surface of the power transmission plate is in contact with two guide rails. The thrust device 4.1 is connected. Mounting ears 3.1 are provided on the force transmission plate and on the side connected to the thrust device. The mounting ears are provided with a guide chute 3.1a. The end of the thrust device is set in the guide chute. The thrust device of the shield machine is pushed out for a distance. Then, retract the thrust device and pull out the legs, so that when the thrust device is contracted, the reaction force component and the force transmission plate are advanced, and then the legs are inserted into the reaction hole of the next group to continue the above process; cycle forward Until the shield machine is pushed to the predetermined position.

In this embodiment, an arc-shaped groove adapted to the shield body of the shield machine is provided on the guide platform of the shield machine, and two guide rails are symmetrically arranged on both sides of the arc-shaped groove; The thickness of the assembled tunnel segment is 40-50cm, and the shield tunnel segment is made of C50 concrete with compressive strength.

In this embodiment, the distance between the two adjacent sets of reaction force holes is adapted to the forward advancement distance of each step of the shield machine; the upper surface of the positioning bottom plate and the lower surface of the positioning top plate are both in accordance with the shape of the force transmission plate Match.

In this embodiment, the reaction force assembly further includes a pressure device 2.10 connected to the hydraulic chamber, and the pressure device is disposed on the leg; by setting the device, the position of the support plate in the horizontal direction can be appropriately adjusted to further reduce the reaction force. Damage to concrete guide platform of shield machine.

Example 2

Referring to FIG. 9, another shield pushing machine stepping device of the present invention includes a reaction force component 2 and a force transmission plate 3 provided on a shield machine guide 1. The shield machine guide is provided with a shield for the shield. The two guide rails 1.1 that the machine 4 advances forward are provided with multiple sets of reaction force holes 1.2 spaced apart along the length direction of the two guide rails. The number of reaction force holes in each group of reaction force holes is two, and two reaction forces are provided. The distance between the force holes matches the distance between the two reaction force pieces.

In this embodiment, the reaction force assembly includes two reaction force pieces 2a, the reaction force single piece includes a positioning bottom plate 2.1, a positioning top plate 2.2, and two legs 2.3, and the positioning bottom plate is provided on the shield machine guide platform for positioning The top plate is located above the positioning top plate, and the legs are vertically inserted in the reaction force holes, and the leg closest to the shield machine is connected to the positioning bottom plate and the positioning top plate. Specifically, the legs penetrate the positioning bottom plate and the positioning top plate up and down. There is a hydraulic chamber 2.3a in the outriggers. The hydraulic chamber is equipped with hydraulic oil for transmitting pressure. The bottom of the outriggers is provided with a mounting groove on the side far from the shield machine. One end of the mounting groove is connected to the hydraulic chamber. Power transmission rod 2.4, the other end of the power transmission rod is connected with a pressure bearing plate 2.5, the outer surface of the pressure transmission plate is covered with a gasket 2.6, the power transmission rod and the pressure bearing plate are located in the reaction force hole; The legs are inserted vertically in the reaction force hole, which effectively prevents the legs and levers from forming when the air-actuated stepping device acts as a reaction force, and prevents the concentration of the upper and lower parts of the guide platform from being broken. By setting an oil pressure system, The force on one leg is evenly distributed to the legs of the facet to avoid excessive stress on a single reaction force hole; the gasket 2.6 is a rubber gasket, which can fill the reaction force hole unevenly and increase the contact area. Reduce concentrated stress.

In this embodiment, the power transmission plate is fixed between the positioning bottom plate and the positioning top plate by a plurality of fixing members 2.7, and the lower surface of the power transmission plate is in contact with two guide rails. The thrust device 4.1 is connected. Mounting ears 3.1 are provided on the force transmission plate and on the side connected to the thrust device, and the end of the thrust device is provided with a hook adapted to the mounting ears; during the work, after the thrust device of the shield machine is pushed out for a distance, pull out When the outriggers are out, the thrust device shrinks and drives the reaction force component and the power transmission piece forward, and then insert the outriggers into the reaction hole of the next group, and continue the above process.

In this embodiment, the force-transmitting sheet is a tunnel assembled segment, the thickness of the tunnel assembled segment is 40-50 cm, and the shield tunnel segment is made of C50 concrete; the structure is easy to obtain and the structural strength is high.

The air-driven stepping device of the shield machine of the invention has simple operation method. Compared with the existing device, it can greatly reduce the thickness of the guide table, reduce the amount of concrete and reinforcement, reduce labor, reduce the economic cost, and help speed up the construction. .

The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

An air-propelled stepping device for a shield machine is characterized in that it comprises a reaction force component (2) and a force transmitting piece (3) provided on a shield machine guide (1), on the shield machine guide. Two guide rails (1.1) are provided for the forward advancement of the shield machine (4), and a plurality of sets of reaction force holes (1.2) are arranged between the two guide rails at intervals along the length of the guide rails;

The reaction force component includes at least one reaction force piece (2a), the reaction force piece includes a positioning bottom plate (2.1), a positioning top plate (2.2), and at least one leg (2.3), and the positioning bottom plate is disposed at On the guide platform of the shield machine, the positioning top plate is located above the positioning bottom plate, the legs are vertically inserted in the reaction force hole, and the legs closest to the shield machine and the positioning floor are It is connected to the positioning roof. The outrigger is provided with a hydraulic chamber (2.3a). The hydraulic chamber is equipped with hydraulic oil for transmitting pressure. The bottom of the outrigger is on the side far from the shield machine. A mounting groove is provided, and a power transmission rod (2.4) connected to the hydraulic chamber at one end is provided in the mounting groove, and a pressure bearing plate (2.5) is connected to the other end of the power transmission rod, and the pressure bearing plate A gasket (2.6) is coated on the outer surface of the power transmission rod, and the force transmission rod and the pressure bearing plate are both located in the reaction force hole;

The power transmission plate is fixed between the positioning bottom plate and the positioning top plate by a plurality of fixing members (2.7), and a lower surface of the power transmission plate is in contact with the two guide rails. It is connected with the thrust device (4.1) at the tail of the shield machine.
The air-driven stepping device for a shield machine according to claim 1, wherein the reaction force component comprises two reaction force pieces (2a) arranged side by side, and each of the reaction force pieces includes a support A leg (2.3), said legs penetrating the positioning bottom plate and the positioning top plate up and down.
The air-driven stepping device for a shield machine according to claim 2, wherein the number of the reaction force holes in each group of reaction force holes is two, and the distance between the two reaction force holes is two The distance between the reaction force pieces is adapted.
The air-driven stepping device for a shield machine according to claim 1, wherein the reaction force component comprises two reaction force pieces (2a) arranged side by side, and each of the reaction force pieces includes two Outriggers (2.3), two outriggers are vertically spaced along the advancement direction of the shield machine, the outriggers close to the shield machine penetrate the positioning floor and the top plate up and down, and the hydraulic pressure of the two legs is The chambers are connected by a hydraulic pipe (2.8); the reaction force single piece further includes two telescopic members (2.9), and the two connecting pieces are used to connect the two legs and are respectively connected to the positioning bottom plate and Position the top plates to connect.
The air-driven stepping device for a shield machine according to claim 4, wherein the telescopic member includes a member body (2.9a) and an inner sleeve rod (2.9b), and the member body is used for positioning with the positioning device. One end connected to the bottom plate or the positioning top plate is a U-shaped connecting portion, and the other end of the component body is a hollow outer casing rod. The outer casing rod is provided with a plurality of first through holes at intervals along its length. The inner sleeve rod is provided with a plurality of second through holes adapted to the first through hole; the inner sleeve rod is inserted in the outer sleeve rod, and the inner rod passes through between the inner rod and the outer sleeve rod. The connector is fixed.
The air-driven stepping device for a shield machine according to claim 5, wherein the connecting portion, the positioning top plate, and the positioning bottom plate are provided with insertion holes through which the legs pass up and down, and the legs Interference fit with the insertion hole.
The air-driven stepping device for a shield machine according to claim 4, wherein the number of the reaction force holes in each group of reaction force holes is four, and the distance between the four reaction force holes is The distance between the four legs in the reaction force assembly is adapted.
The air-thrusting stepping device for a shield machine according to any one of claims 1 to 7, wherein a mounting ear (3.1) is provided on the force transmitting sheet and on a side connected to the thrust device, The end of the thrust device is provided with a hook adapted to the hanging ear. When the thrust device is contracted, the reaction force component and the force transmission piece are advanced.
The air-driven stepping device for a shield machine according to any one of claims 1 to 7, wherein the force transmitting sheet is a tunnel assembled segment, and the thickness of the tunnel assembled segment is 40-50 cm, The shield tunnel segment is made of C50 concrete.
The air-driven stepping device for a shield machine according to any one of claims 1 to 7, wherein the reaction force component further comprises a hydraulic pressurizing device (2.10) for adjusting the oil pressure in the hydraulic chamber. .