阅读说明：本技术 下穿隧道移动栈桥及其施工方法 (Mobile trestle for underpass tunnel and construction method thereof ) 是由 田洪胜 余波 陈云 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种下穿隧道移动栈桥及其施工方法。下穿隧道移动栈桥包括前引桥、后引桥和多组栈桥单元,栈桥单元包括主桥、主桥行走机构和主桥顶升机构,多组栈桥单元串联连接,相邻两栈桥单元的主桥通过长度面铰接,前引桥连接在首端栈桥单元主桥的长度面处,后引桥设置在末端栈桥单元主桥的长度面处；主桥行走机构和主桥顶升机构设置在主桥的宽度面上。本发明能保证正常道路通行的情况下修建下穿隧道。(The invention discloses a mobile trestle for a downward tunnel and a construction method thereof. The underpass tunnel mobile trestle comprises a front approach bridge, a rear approach bridge and a plurality of trestle units, wherein each trestle unit comprises a main bridge, a main bridge walking mechanism and a main bridge jacking mechanism; the main bridge running mechanism and the main bridge jacking mechanism are arranged on the width surface of the main bridge. The invention can build the underpass tunnel under the condition of ensuring normal road traffic.)

1. The utility model provides a tunnel removes landing stage under wears which characterized in that: the bridge comprises a front approach bridge (1), a rear approach bridge (2) and a plurality of groups of landing stage units (14), wherein each landing stage unit (14) comprises a main bridge (3), a main bridge walking mechanism (4) and a main bridge jacking mechanism (5), the plurality of groups of landing stage units (14) are connected in series, the main bridges of two adjacent landing stage units (14) are hinged through a length surface, the front approach bridge (1) is connected to the length surface of the main bridge (3) of the landing stage unit at the head end, and the rear approach bridge (2) is arranged at the length surface of the main bridge (3) of the landing stage unit at the tail end; the main bridge traveling mechanism (4) and the main bridge jacking mechanism (5) are arranged on the width surface of the main bridge (3).

2. The underpass tunnel mobile trestle of claim 1, characterized in that: the steel plates (6) that slide are paved on the surfaces of the joints of the two adjacent main bridges (3), after the multiple groups of trestle units (14) are connected, the top surface formed by the combination of the front approach bridge (1), the main bridges (3) connected in series, the steel plates (6) that slide and the rear approach bridge (2) forms a passing surface, and a construction area is formed below the main bridges (3).

3. The underpass tunnel mobile trestle of claim 2, characterized in that: still include side direction access bridge (13), side direction access bridge (13) set up in length limit one side or both sides of passing through the face, set up when one side, form the face of passing through of turning left or turn right and pass through the face, set up when both sides, form the face of passing through of turning left and turn right and pass through the face.

4. The underpass tunnel mobile trestle of claim 3, characterized in that: one end of the sliding steel plate (6) is fixed on the main bridge (3) of one trestle unit (14), and the other end is lapped on the main bridge (3) of the next trestle unit (14).

5. The underpass tunnel mobile trestle of claim 4, characterized in that: the front approach bridge (1) is provided with 4 groups and is hinged with the length surface of the main bridge (3) of the head end trestle unit, and the two ends of each of 4 front approach bridge jacking oil cylinders (7) of the front approach bridge (1) are respectively hinged on the front approach bridge (1) and the main bridge (3) of the head end trestle unit.

6. The underpass tunnel mobile trestle of claim 5, characterized in that: the rear approach bridge (2) is 2 groups and hinged with the length surface of the tail trestle unit main bridge (3), a rear approach bridge sliding sleeve is arranged on the rear approach bridge (2), and 4 groups of rear approach bridge traveling mechanisms (8) are arranged in the rear approach bridge sliding sleeve.

7. The underpass tunnel mobile trestle of claim 6, characterized in that: the trestle unit (14) is characterized in that 4 main bridge sliding sleeves are arranged on the opposite sides of the two sides of the width surface of the main bridge (3), and 4 main bridge traveling mechanisms (4) are respectively connected in the main bridge sliding sleeves in a sliding mode.

8. The underpass tunnel mobile trestle of claim 7, characterized in that: the main bridge jacking mechanism (5) is of a plurality of groups, each group comprises 4 main bridge jacking oil cylinders, and two ends of each main bridge jacking oil cylinder are respectively hinged with the main bridge sliding sleeve and the main bridge travelling mechanism (4).

9. The underpass tunnel mobile trestle of claim 8, characterized in that: when the main bridge travelling mechanism (4) travels, the main bridge travelling mechanism (4) is supported on the track (11), and the track (11) is erected on a crown beam (12) poured after pile foundation construction on two sides of the underpass tunnel.

10. The construction method of the underpass tunnel mobile trestle of claim 1, which is characterized by comprising the following steps:

a. pre-laying a track on the top surface of the crown beam for trestle traveling and vehicle passing supporting;

b. mounting a trestle;

c. after the trestle is installed, performing construction operation below the trestle;

d. when the tunnel concrete lining strength of a construction section meets the vehicle passing requirement:

d1, removing the lateral approach bridge;

d2, jacking the front approach bridge jacking oil cylinder to lift the front approach bridge off the existing road surface;

d3, jacking a rear approach bridge jacking oil cylinder to lift the rear approach bridge so that the rear approach bridge travelling mechanism is supported on the top surface of the poured tunnel;

d4, lifting all the trestle units by a main bridge lifting oil cylinder so as to support the main bridge travelling mechanism on the track;

d5, starting a main bridge traveling mechanism, and traveling the trestle to the next circulating construction station;

d6, contracting the front approach bridge jacking oil cylinder to support the front end of the front approach bridge on the existing road surface;

d7, retracting the rear approach bridge jacking oil cylinder to lift the rear approach bridge walking mechanism away from the bottom surface, so that the front end of the rear approach bridge is supported on the top surface of the poured tunnel;

d8, retracting the main bridge jacking oil cylinder to lift the main bridge travelling mechanisms of all the trestle units away from the track, so that the support of each trestle unit is supported on the track;

d9, installing lateral approach bridges at two ends of the width surface of the trestle unit needing to pass left and right;

e. and after the trestle is erected, the road traffic is recovered, and the next circular tunnel construction is carried out below the trestle, and the steps are repeated until the tunnel construction is completed.

Technical Field

The invention relates to a construction device for a downward tunnel, in particular to a movable trestle for the downward tunnel and a construction method thereof.

Background

With the development of economy, the quantity of social vehicles is more and more reserved, urban traffic congestion becomes a common phenomenon in China, the existing road cannot meet the requirements of people on working and living traffic traveling, and in order to solve the problem, a tunnel penetrating through the lower portion of the existing road is built to become an effective solution.

When the underpass tunnel is constructed, a foundation pit needs to be excavated under the existing road for construction operations such as tunnel lining, narrow temporary traffic channels can be isolated at two sides of a construction area in the tunnel construction period, the traffic passage of the road section is seriously influenced, the construction period of a construction unit is short, the construction pressure is high, and the quality control is not facilitated.

Some traffic jam road sections need to be built with a tunnel, and temporary passing lanes cannot be isolated due to the fact that the road is narrow, and at present, no feasible construction scheme exists and the temporary passing lanes cannot be built.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a mobile trestle for a downward tunnel and a construction method thereof. The invention can build the underpass tunnel under the condition of ensuring normal road traffic.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a tunnel removes landing stage under wears which characterized in that: the bridge comprises a front approach bridge, a rear approach bridge and a plurality of groups of trestle units, wherein each trestle unit comprises a main bridge, a main bridge walking mechanism and a main bridge jacking mechanism; the main bridge running mechanism and the main bridge jacking mechanism are arranged on the width surface of the main bridge.

The surface of the joint of two adjacent main bridges is paved with a sliding steel plate, after a plurality of groups of trestle units are connected, a top surface formed by the combination of the front approach bridge, the plurality of main bridges connected in series, the sliding steel plate and the rear approach bridge forms a passing surface, and a construction area is formed below the main bridges.

The invention also comprises lateral approach bridges which are arranged on one side or two sides of the length edge of the passing surface, form a left-turn passing surface or a right-turn passing surface when arranged on one side, and form a left-turn passing surface and a right-turn passing surface when arranged on two sides.

One end of the sliding steel plate is fixed on a main bridge of one trestle unit, and the other end of the sliding steel plate is lapped on a main bridge of the next trestle unit.

The front approach bridge is 4 groups and hinged with the length surface of the main bridge of the head end trestle unit, 4 front approach bridge jacking oil cylinders of the front approach bridge are respectively hinged on the front approach bridge and the main bridge of the head end trestle unit at two ends.

The rear approach bridge is 2 groups and hinged with the length surface of the main bridge of the tail trestle unit, a rear approach bridge sliding sleeve is arranged on the rear approach bridge, and 4 groups of rear approach bridge traveling mechanisms are arranged in the rear approach bridge sliding sleeve.

The side direction approach bridge is 2 groups or 4 groups, forms the face of passing through of turning left or turning right when being 2 groups, and when being 4 groups, forms the face of passing through of turning left and the face of passing through of turning right, and every group is articulated with the width face both ends of arbitrary landing stage unit main bridge.

And two ends of each of the 4 rear approach bridge jacking oil cylinders of the rear approach bridge are respectively hinged to the rear approach bridge sliding sleeve and the rear approach bridge travelling mechanism.

The main bridges of the two adjacent trestle units are hinged through length surfaces and then fixed through bolts.

The trestle unit main bridge is characterized in that 4 main bridge sliding sleeves are arranged on the opposite sides of the two sides of the width surface of the main bridge, and 4 main bridge traveling mechanisms are respectively connected in the main bridge sliding sleeves in a sliding mode.

The main bridge jacking mechanism is of a plurality of groups, each group comprises 4 main bridge jacking oil cylinders, and two ends of each main bridge jacking oil cylinder are respectively hinged with the main bridge sliding sleeve and the main bridge travelling mechanism.

When the main bridge travelling mechanism travels, the main bridge travelling mechanism is supported on a track, and the track is erected on a crown beam poured after pile foundations on two sides of the underpass tunnel are constructed.

A construction method of a mobile trestle for a downward tunnel is characterized by comprising the following steps:

a. pre-laying a track on the top surface of the crown beam for trestle traveling and vehicle passing supporting;

b. mounting a trestle;

c. after the trestle is installed, performing construction operation below the trestle;

d. when the tunnel concrete lining strength of a construction section meets the vehicle passing requirement:

d1, removing the lateral approach bridge;

d2, jacking the front approach bridge jacking oil cylinder to lift the front approach bridge off the existing road surface;

d3, jacking a rear approach bridge jacking oil cylinder to lift the rear approach bridge so that the rear approach bridge travelling mechanism is supported on the top surface of the poured tunnel;

d4, lifting all the trestle units by a main bridge lifting oil cylinder so as to support the main bridge travelling mechanism on the track;

d5, starting a main bridge traveling mechanism, and traveling the trestle to the next circulating construction station;

d6, contracting the front approach bridge jacking oil cylinder to support the front end of the front approach bridge on the existing road surface;

d7, retracting the rear approach bridge jacking oil cylinder to lift the rear approach bridge walking mechanism away from the bottom surface, so that the front end of the rear approach bridge is supported on the top surface of the poured tunnel;

d8, retracting the main bridge jacking oil cylinder to lift the main bridge travelling mechanisms of all the trestle units away from the track, so that the support of each trestle unit is supported on the track;

d9, installing lateral approach bridges at two ends of the width surface of the trestle unit needing to pass left and right;

e. and after the trestle is erected, the road traffic is recovered, and the next circular tunnel construction is carried out below the trestle, and the steps are repeated until the tunnel construction is completed.

The invention has the advantages that:

1. the invention structurally sets the longitudinal main bridge of the trestle for the railway tunnel as a transverse main bridge, connects a plurality of main bridges in series, changes the front-back passage into the front-back passage and the left-right passage and the position of a walking mechanism by changing the connecting position of the front-back approach bridge and adding the lateral approach bridge, can construct the underpass tunnel under the condition of ensuring normal road passage, relieves the traffic pressure caused by the former construction mode, eliminates the quality defect caused by short construction period of a construction unit, and particularly solves the contradiction that the underpass tunnel cannot be repaired because the road section limited by a site needs to be repaired.

2. Because a part of underpass tunnels are provided with curved channels, the invention adopts sliding steel plates for overlapping among trestle units through hinged and series-connected trestles to meet the requirement of trestle bending and passing.

3. Because a slope is arranged on part of the underpass tunnel, each trestle unit is provided with an independent walking mechanism, and the design can meet the traction force required by the movement of the trestle.

4. The modular design is adopted, the installation is rapid, and the influence on traffic is reduced to the minimum.

Drawings

FIG. 1 is a schematic view of the construction layout of the present invention;

FIG. 2 is a top view of a linear segment trestle of the present invention;

FIG. 3 is a top view of a bridge having a minimum curved section according to the present invention;

FIG. 4 is a front view of the present invention;

fig. 5 is a side view of the present invention.

Labeled as: 1. the system comprises a front approach bridge, 2, a rear approach bridge, 3, a main bridge, 4, a main bridge traveling mechanism, 5, a main bridge jacking mechanism, 6, a sliding steel plate, 7, a front approach bridge jacking oil cylinder, 8, a rear approach bridge traveling mechanism, 9, a rear approach bridge jacking oil cylinder, 10, a bolt, 11, a rail, 12, a crown beam, 13, a lateral approach bridge, 14 and a trestle unit.

Detailed Description