TWI540237B - Construction method of steel-structure bridge - Google Patents

Description

Construction method of steel bridge

The invention relates to a construction method of a steel bridge, in particular to a construction method related to the lifting of a steel bridge.

Referring to Figure 1, in the conventional steel bridge construction method, the segments are usually assembled on the ground. When performing the block lifting operation, generally two rails 21 are laid between the inner and outer webs of the completed bridge deck, and a shifting work cart 20 is provided to suspend the mass G1 below the deck surface. The shifting work vehicle 20 is moved forward along the two rails 21 at the level of the other two hydraulic jacks, and the mass G1 is transported from the abutment to the front of a hoisting work vehicle 10, and then the gantry work vehicle 10 is used to lift the block G1. Pull up below the deck to the front of block A.

The hoisting work vehicle 10 includes a body truss structure 11, a main erection beam 12, and two hydraulic jacks 13, 14 for vertical lifting. The operation of lifting the lifting block is to pull or lower the steel cable with the hydraulic jacks 13, 14 by using two hydraulic jacks 13, 14 fixed on the main erection beam 12 and two steel cables 15 passing through the jacks 13, 14. 15 for it. It should be noted that after the hoisting work vehicle 10 is positioned, the steel cable 15 is lowered at a certain point, and the block G1 is pulled up. In other words, the lifting point of the segment G1 and its mounting position are on the same vertical line. Since the main erection beam 12 cannot be horizontally moved as long as the steel cable 15 of the work vehicle 10 is hoisted, the node G1 cannot be laterally conveyed during the horizontal movement of the hoisting work vehicle 10.

Figure 2 shows another conventional segment hoisting operation applied to a small span using a truss work vehicle 30 having a horizontal truss 31 and a plurality of upright trusses 32. The length of the horizontal truss 31 is fixed, but the upright truss 32 can be replaced to match the spacing of the different piers. However, the truss type work vehicle 30 is not suitable when the distance between the piers is too long and is greater than the length of the horizontal truss 31.

An object of the present invention is to provide a method for constructing a steel bridge, and the method for hoisting the block is suitable for the construction of a steel bridge with a long distance between the piers or a curved or non-linear extension of the bridge.

In order to achieve one or a part or all of the above or other objects, the present invention provides a method for constructing a steel bridge, comprising: constructing a part of a steel bridge to form a completed bridge deck, so that the completed bridge mask has a front end block and a rear end block, the front end block is oriented toward the center of the steel bridge, and the rear end block is oriented toward one side of the steel bridge; a crane, a car and a work vehicle are disposed on the completed bridge deck Above, and the work vehicle is located on the front end block of the completed bridge deck, wherein the work vehicle has a front side portion and a rear side portion, the rear side portion is opposite to the front side portion, and the front side portion protrudes from the front end portion of the completed bridge deck In addition, there is a translation mechanism between the front side and the rear side, and a vertical suspension device is arranged on the translation mechanism; the plurality of parts of a new section are suspended by the crane above the completed bridge deck, and these parts are Assembled into a new section; use the trolley to transport the new section above the completed deck to the side of the rear of the work vehicle; use the translation mechanism of the work vehicle to translate the new section from the rear side above the completed deck a front side thereof, and a vertical suspension device is used to move the new section located at the front side to a height engageable with the front end of the completed deck; the new section is joined to the front end of the completed deck Together; then, repeat the aforementioned new section The assembly and joining process of the blocks until the completion of the steel bridge.

In an embodiment, the steel bridge spans a terrain, so the more detailed steps of forming the completed bridge deck are: setting a first pier and a second pier on one side of the terrain, and setting a third pier And a fourth pier on the other side of the terrain, such that the second pier and the third pier are respectively adjacent to the two sides of the terrain; a plurality of berths are erected between the first pier and the second pier, and the third pier is A plurality of berths are erected between the fourth piers; and a plurality of segments are assembled on the ground, and the segments are hoisted by a crane to the piers and the bunkers, and the direction from the second pier to the first pier is The sequence is connected between the second pier and the first pier, and is connected between the third pier and the fourth pier from the third pier to the fourth pier, respectively forming two completed bridges on both sides of the topography. In the face, the two completed bridge faces are the side edges of the steel bridge.

In an embodiment, the step of erecting the plurality of bastions includes: arranging two treasurys respectively adjacent to the two sides of the second pier; and arranging the two berths respectively adjacent to the two sides of the fourth pier.

In an embodiment, the method of constructing the steel bridge further comprises the steps of: removing a portion of the forts adjacent to the first pier and the fourth pier after the two side spans are formed. After the two side spans are formed, a plurality of gantry are erected on the topography between the second pier and the third pier. After completing the joining of the last segment, remove the gantry.

In an embodiment, the construction method of the steel bridge further comprises the following steps: after assembling the new block with the front end block of the completed bridge deck, moving the work vehicle to the top of the new block, so that The front side protrudes beyond the new section; repeats the aforementioned moving work vehicle, assembles the parts of the new section and joins the new section and the completed deck surface, so that the two completed bridge decks on both sides of the terrain gradually extend toward The center of the terrain depends on the raft.

In an embodiment, the step of setting up the crane comprises: assembling a work platform prior to the completed bridge deck, and then moving the crane to the work platform. The steps of setting up the trolley and the work vehicle include: lifting the parts of the work vehicle onto the completed bridge surface by the crane, assembling the work vehicle on the completed bridge surface; and lifting the parts of the trolley on the completed bridge surface by the crane, The assembled trolley on the bridge has been completed.

10‧‧‧Study hoisting work vehicle

11‧‧‧ Body truss structure

12‧‧‧Main erection beam

13, 14‧‧‧ hydraulic jack for vertical lifting

15‧‧‧Steel cable

Section A‧‧‧

G1‧‧‧ blocks

21‧‧‧ Tracks on the bridge

20‧‧‧Change work car

30‧‧‧Legs of trussed work vehicles

31‧‧‧ horizontal truss

32‧‧‧Upright Truss

P192, P193, P194, P301‧‧ ‧ piers

S1, S11, S12, S2, S21, S22‧‧ ‧ Fort

G1~G39‧‧‧ blocks

OP1, OP2‧‧‧ operating platform

H1, H2‧‧‧ crane

W1, W2‧‧‧ cantilever work vehicle

W11‧‧‧ front side

W12‧‧‧ rear side

W13‧‧‧ translation mechanism

W14‧‧‧Vertical Suspension

F1, F2‧‧‧ trolley

M1~M4‧‧‧ gantry

Figure 1 shows a conventional bridge construction method.

Figure 2 is another conventional bridge construction method.

3A to 3T illustrate a method of constructing a steel bridge according to an embodiment of the present invention.

4 is a steel bridge according to an embodiment of the present invention.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as upper, lower, left, right, front or rear, etc., are only used to refer to the directions of the accompanying drawings. Therefore, the directional terms are used for illustration only and are not intended to limit the invention.

3A to 3Z are views showing an embodiment of the present invention, illustrating a construction method of a steel bridge.

As shown in Fig. 3A, four piers P192, P193, P194, and P301 are set. The piers P192 and P193 are the left side spans of the steel bridge. The piers P193 and P194 are the roads or rivers that the steel bridges span. The pier between the piers P194 and P301 is the right side span of the steel bridge. Two fort S11 and S12 are set on both sides of the pier P193, and two fort S21 and S22 are set on both sides of the pier P194. Assemble the block G11 on the ground, and then lift the block G11 up by the general crane. Hang and install it above the pier P193. The node G29 of the right side span is mounted above the pier P194 in the same manner.

As shown in Fig. 3B, a plurality of slings S1 are provided between the piers P192 and P193 of the left side span, and a plurality of slabs S2 are similarly provided between the piers P194 and P301 of the right side. After assembling the block G10 on the ground, the block G10 is lifted up above the bunker S1 by a general crane and connected to the left side of the block G11. Thereafter, the segments G9, G8, and G7 are sequentially connected to the left side of the G10 to form a part of the completed bridge deck. In the same way, the segments G30, G31, G32, G33 are sequentially connected to the right side of the block G29 in the same manner to form another completed bridge deck. Then, a working platform OP1 and OP2 are respectively assembled on the left and right completed bridge surfaces for the general crane operation.

FIG. 3C shows that the general cranes H1 and H2 are placed on the work platforms OP1 and OP2, respectively. The completed bridge deck on the left side continues to the upper block G6, and the completed bridge deck on the right side continues to the upper block G34.

As shown in Fig. 3D, the components of the work vehicles W1 and W2 are suspended by the cranes H1 and H2 on the completed bridge deck of the left side span and the right side span, and are assembled on the bridge deck into a cantilever work with a special structural design. Cars W1 and W2. Since the left and right sides of the steel bridge are only in different construction directions, the rest of the construction process is the same. Therefore, the construction process of the left side span is taken as an example for subsequent description. The work vehicle W1 has a front side portion W11 and a rear side portion W12, the rear side portion W12 is opposite to the front side portion W11, and a translation mechanism W13 and a passage surrounded by a steel frame are provided between the front side portion W11 and the rear side portion W12. A vertical suspension device W14 is disposed on the translation mechanism W13.

As shown in Fig. 3E, in the present embodiment, the position of the work vehicle W1 is fixed to the upper surface of the node G11, and the front side portion W11 extends beyond the front end node G11 of the completed bridge deck on the left side. Take The crane H1 hoists the parts of the trolley F1 onto the bridge deck and assembles a vehicle F1 on the completed bridge deck between the work platform OP1 (or the crane H1) and the work vehicle W1. The trolley F1 is used to transport the new block assembled by the crane H1 to the rear side W12 of the work vehicle W1. During the assembly of the work platform OP1, the trolley F1 and the work vehicle W1, the completed bridge deck of the left side span is continuously connected to the nodes G2 to G5. In the right side of the cross-section trolley F2, the crane H2 and the work vehicle W2, the three work modes are the same.

Fig. 3F shows the left side span which is joined by the segments G1 to G11, and the right side span which is joined by the segments G29 to G39.

In Fig. 3G to Fig. 3H, the jacks of the slings S1 and S2 across the left and right sides are returned, and then the blocks G6, G7, G8, G9, G11 and G29, G31, G32, G33, G34 are retained. There are 12 bastions below and the remaining bastions are removed. In this embodiment, each of the remaining 12 berths is provided with a support mat which functions as a medium for transferring the weight of the slab to the bastion. Each segment includes a wing. The support mat and the lower wing of the segment need to maintain a gap of 10 mm to prevent the steel bridge from falling over until all the blocks are hoisted.

The process of Figures 3I to 3T is to construct a bridge deck between the piers P193 and P194. As shown in Fig. 3I, after completing the left and right side spans, four gantry M1~M4 are erected between the piers P193 and P194 (i.e., at the center of the road where the steel bridge is intended to straddle). It is worth mentioning that the distance between the gantry M2 and M3 should be relatively close for the future installation of the central section of the steel bridge between the gantry M2 and M3.

Figures 3J through 3K illustrate the assembly, transport of the segments G12 and their engagement with the completed deck.

FIG. 3L illustrates that after the engagement of the block G12 and the completed bridge deck is completed, the front end block of the completed bridge deck on the left side is G12, so the work vehicle W1 needs to be moved right to the block G12. In order to perform the joining of the subsequent block G13.

Each of the segments G12 to G19 in Fig. 3M repeats the assembly, transportation, joining of the completed bridge deck and the movement of the working vehicle W1 of the block G12 of Fig. 3J to Fig. 3L, so that the completed bridge deck is bridged. The sides extend to the center until the entire steel bridge is completed by the raft. The construction process of G28~G21 on the right side is also the same, only the connection direction of the new section is different.

In Fig. 3N, the completed bridge deck on the left side (joined by the segments G1 to G19) and the completed bridge deck on the right side (joined by the segments G21 to G39) are only one block apart from each other. The work vehicle W1 on the left side has been moved rightward from the block G11 to the block G18, and the work vehicle W2 on the right side has been moved to the left by the block G29 to the block G22. In an embodiment, in order to ensure the safety of the construction process, it is necessary to reduce the support force of the pier P193 on the support block by the jacking frame M2. However, the process of jacking up the gantry M2 requires the auxiliary support force of the gantry M1 to assist, otherwise the support force of the struts P193 on the nodules thereon may exceed the allowable strength. After jacking the mast M2, the auxiliary support force of the mast M1 will naturally release due to the jacking of the mast M2.

In Fig. 3O, the gantry M2 and M3 are supported by a mat. The left working vehicle W1 moves to the right (ie, moves inward) to the block G19, and the right working vehicle W2 also moves to the right to the block G23 to avoid collision with the left working vehicle W1.

In Figure 3P, the crane H1 begins assembly of the parts of the segment G20 on the completed bridge deck. 3Q to 3R show that the block G20 is transported by the carriage F1 above the pier P193 and the block G15, and is sent to the rear side W12 of the work vehicle W1. 3S to 3T show that the work vehicle W1 starts to lift the node G20, and the block G20 is hung from the rear side portion W12 to the front side portion W11, and moves down to the joint between the blocks G19 and G21 to complete the joint. Hoisting work of steel bridge 100.

Figure 4 shows that after the steel bridge 100 is hoisted, the two work vehicles W1 are removed. W2, two cranes H1, H2, and remove the operating platforms OP1 and OP2, and remove all the slings S1, S11, S12, S2, S21, S22 and the gantry M1 ~ M4, then the steel bridge 100 consists of four bridge piers P192 , P193, P194, P301 and the block G1 ~ G39 are joined together.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

P192, P193, P194, P301‧‧ ‧ piers

S1, S11, S12, S2, S21, S22‧‧ ‧ Fort

G1~G12; G29~G39‧‧‧ blocks

H1, H2‧‧‧ crane

W1, W2‧‧‧ cantilever work vehicle

W11‧‧‧ front side

W12‧‧‧ rear side

W13‧‧‧ translation mechanism

W14‧‧‧Vertical Suspension

F1, F2‧‧‧ trolley

M1~M4‧‧‧ gantry

Claims (8)

A steel bridge construction method for constructing a steel bridge, the construction method comprising: constructing a part of the steel bridge to form a completed bridge deck, the completed bridge mask having a front end block and a rear end a block, the front end block is oriented toward a center of the steel bridge, the rear end block is facing one end of the steel bridge; a crane, a car and a work vehicle are disposed above the completed bridge deck, And the work vehicle is located on the front end block of the completed bridge deck, wherein the work vehicle has a front side portion and a rear side portion, wherein the front side portion protrudes beyond the front end block of the completed bridge deck. The rear side portion is opposite to the front side portion, and a translation mechanism is disposed between the front side portion and the rear side portion, and the translation mechanism is provided with a vertical suspension device; the crane is used to lift a plurality of parts of a new node Over the completed deck surface, and assembling the plurality of parts into a new section; using the trolley to transport the new section above the completed deck to the rear side of the work vehicle; using the work vehicle The translation mechanism is already completed Moving the new block from its rear side to its front side above the face, and using the vertical suspension to move the new block located at the front side down to the completed bridge deck a height at which the front end block engages; the new block is joined to the front end block of the completed deck; and the assembly and joining process of the new block is repeated until the steel bridge is completed. The method for constructing a steel bridge according to claim 1, wherein the steel bridge spans a terrain, and wherein the step of forming the completed bridge deck comprises: setting a first pier and a second pier On one side of the terrain, and set a third pier And a fourth pier on the other side of the terrain, wherein the second pier and the third pier are respectively adjacent to the two sides of the terrain; and a plurality of berths are arranged between the first pier and the second pier, And erecting a plurality of berths between the third pier and the fourth pier; and assembling a plurality of segments on the ground, and hoisting the blocks to the piers and the berths by a crane, and The second pier is sequentially connected to the second pier and the first pier, and the third pier is connected to the third pier in the direction of the fourth pier. Between the fourth pier and the two sides of the topography, two completed bridge decks are formed on the two sides of the terrain, and the two completed bridge decks are the side edges of the steel bridge. The method for constructing a steel bridge according to the second aspect of the patent application, wherein the step of erecting the plurality of bastions comprises: setting two treasurys respectively adjacent to two sides of the second pier; and setting two burgers respectively adjacent to the first The sides of the four bridge piers. The method for constructing a steel bridge according to claim 1, further comprising: after forming the two side spans, removing a portion of the pillars adjacent to the first pier and the fourth pier. The method for constructing a steel bridge according to claim 4, further comprising: after forming the two side spans, erecting a plurality of gantry on the topography between the second pier and the third pier And after completing the joining of the last block, remove the gantry. The method for constructing a steel bridge according to claim 1, further comprising: after assembling the new block with the front end block of the completed bridge deck, Moving the vehicle over the new block to extend the front side beyond the new block; and repeating the moving of the work vehicle, assembling the part of the new block and engaging the new block with the new block The process of completing the deck surface is such that the two completed bridge decks on both sides of the terrain gradually lean toward the center of the terrain. The method for constructing a steel bridge according to claim 1, wherein the step of installing the crane comprises: assembling a work platform before the completed bridge surface, and then moving the crane to the work platform. The method for constructing a steel bridge according to claim 7, wherein the step of installing the trolley and the work vehicle comprises: lifting the workpiece of the work vehicle onto the completed bridge surface by the crane, Completing the work vehicle on the bridge deck; and lifting the components of the trolley onto the completed bridge surface by the crane, assembling the trolley on the completed bridge deck.