CN212835003U - Concrete conveying system for constructing cross-river bridge in canyon region - Google Patents

Abstract

The utility model belongs to the technical field of the bridge construction, specifically be a concrete conveying system who is used for gorge area to build across river bridge. The device comprises a cableway bridge, a concrete mixing station, a concrete delivery pump and a delivery pipe; the bridge abutments at two ends of the cableway bridge are respectively arranged on two sides of the canyon, and the cableway bridge is arranged below the bridge to be built; the concrete mixing station and the concrete conveying pump are arranged at one end of the cableway bridge; the concrete delivery pump is connected with one end of the delivery pipe; the conveying pipe is arranged on the bridge floor of the cableway bridge, the other end of the conveying pipe extends to the construction working face, and concrete pumping and pouring of the opposite-shore structure are completed by arranging the conveying pipe on the cableway bridge. The utility model overcomes the problem that concrete pouring is difficult to carry out in the canyon area due to the limitation of the terrain; the pouring position can be flexibly adjusted by changing the position of the conveying pipe on the bridge deck of the cableway, the pouring time is short, the site construction is convenient, and the condition of cold seams after concrete pouring is eliminated.

Description

Concrete conveying system for constructing cross-river bridge in canyon region

Technical Field

The utility model belongs to the technical field of the bridge construction, specifically be a concrete conveying system who is used for gorge area to build across river bridge.

Background

In the traditional concrete construction method in bridge construction, a construction access way reaching an operation surface is opened firstly, and the concrete is transported to the operation surface by a concrete tank truck and then a concrete delivery pump is adopted for carrying out concrete pouring on a structure. However, when the facilities are built across the river in the canyon region, the construction is influenced by the terrain limitation and the difficulty in reaching the working face of the construction sidewalk, and the concrete pouring condition is not provided for part of the construction working face, so that the concrete pouring of the structure is difficult to complete in a traditional mode. The method is characterized in that the method is influenced by steep mountain conditions and broken rock masses in the canyon region, the laying difficulty of the construction sidewalk is high, the operation time is long, the resource investment is large, the construction period is difficult to guarantee, and the traditional scheme of conveying concrete to an operation surface through a mixing tank truck and then pumping is difficult to implement in the region.

To the existing problem, there are two kinds of solutions at present, utilize cable crane handling and massif to erect the elephant trunk respectively. However, there are certain problems with both of these approaches.

The hoisting scheme of the cable crane is adopted: the problems of fixed lifting point position, long pouring time and the like exist, the site construction is not facilitated, and the cold joint is easy to appear in the concrete.

The scheme of erecting a chute on a mountain is adopted: simple structure, it is fast to pour, but can only satisfy the pouring of pile foundation and cushion cap concrete, and along with the gradual rising of pier shaft, the difference of blowing point and cloth point height reduces, and this scheme does not possess the feasibility.

In view of the above, there is an urgent need for a better solution to the problems of transporting and pouring concrete when constructing a bridge across rivers in a canyon region.

SUMMERY OF THE UTILITY MODEL

In order to overcome and stride the technical problem that river bridge in-process can't adopt the traditional mode to carry out the concrete transportation and pour because of receiving the topography restriction in the construction of gorge area, the utility model provides a simple structure is reliable, construction cost hangs down and the convenient quick concrete transportation system who is used for river bridge is striden in the construction of gorge area to the construction cost.

In order to realize the purpose, the utility model discloses a technical scheme is: a concrete conveying system for constructing a bridge in a canyon region comprises a ropeway bridge, a concrete mixing station, a concrete conveying pump and a conveying pipe; the bridge abutments at two ends of the cableway bridge are respectively arranged on two sides of the canyon, and the cableway bridge is arranged below the bridge to be built; the concrete mixing station and the concrete conveying pump are arranged at one end of the cableway bridge; the concrete delivery pump is connected with one end of the delivery pipe; the conveying pipe is arranged on the bridge floor of the cableway bridge, the other end of the conveying pipe extends to the construction working face, and concrete pumping and pouring of the opposite-shore structure are completed by arranging the conveying pipe on the cableway bridge.

Compared with the prior art, the beneficial effects of the utility model are that: by erecting cableway bridges on two sides of the canyon and laying the conveying pipes on the bridge floor, the problem that concrete pouring is difficult to perform due to terrain limitation in the canyon area is solved; the utility model can flexibly adjust the pouring position by changing the position of the conveying pipe on the bridge deck of the cableway, has short pouring time and is convenient for on-site construction, and eliminates the cold joint after concrete pouring; and utilize the utility model discloses the concreting operation does not receive the influence of pouring height, has also avoidd the safety risk that the pavement excavation process produced simultaneously.

In order to optimize the above scheme, the utility model discloses make further improvement, the improvement scheme as follows.

Further, the cableway bridge comprises an anchoring cable, a bearing cable, a stabilizing cable, a wind cable, a stabilizing beam, a bridge abutment, a cable saddle and a bridge deck; the bearing cable and the stabilizing cable are fixed by steel wire ropes with the diameter phi of 42mm, and the standard value of the tensile strength of the steel wire ropes is 1960 Mpa; the anchoring cables are fixed in a rock anchoring mode.

Furthermore, the bearing cable and the stabilizing cable are respectively connected with the anchoring cable by adopting a steel wire rope connector and are fixed by a U-shaped buckle.

Furthermore, one set or two sets or three sets or more than three sets of conveying pipes are arranged on the bridge deck of the cableway bridge; when one set of the conveying pipe is laid, the conveying pipe is arranged at the center of the ropeway bridge; when two sets of the conveying pipes are arranged, the conveying pipes are respectively arranged on two sides of the ropeway bridge; when three or more sets of the conveying pipes are arranged, the conveying pipes are uniformly distributed on the bridge floor.

Drawings

Fig. 1 is a schematic layout and structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a cableway bridge according to an embodiment of the present invention.

Fig. 3 is a cross-sectional layout of a cableway bridge according to an embodiment of the present invention.

Fig. 4 is a schematic view of a large sample of the rope anchoring cable of the cableway bridge according to the embodiment of the present invention.

Fig. 5 is a schematic view of the relationship between the abutment and the saddle of the cableway bridge according to the embodiment of the present invention.

In the figure: a cableway bridge 1; an anchor cable 101; a centering bracket 1011; an asphalt plug layer 1012; a stirrup ring 1013; an expansion ring 1014; a load bearing cable 102; a stabilizer wire 103; a wind cable 104; a stabilizing beam 105; an abutment 106; a cable saddle 107; a deck 108; a steel pipe guardrail 109; abutment stops 110; a concrete mixing plant 2; a concrete delivery pump 3; a delivery pipe 4.

Detailed Description

The invention will be further described with reference to the following examples, which are intended only for a better understanding of the invention.

The novel main creation thinking of this use: through building the river-crossing cableway bridge 1, the concrete delivery pumps 3 are arranged on one side of the bridge head, and concrete pouring of structures on the other side is carried out in a mode that the delivery pump pipes are arranged on the river-crossing cableway bridge 1 to a construction working face, so that pile foundation concrete pouring can be met, and meanwhile, two concrete delivery pumps 3 can be adopted for pouring simultaneously when large-volume bearing platform concrete is poured, and the concrete pouring strength is improved to the maximum extent. In the pier body construction process, along with the gradual rise of the pier body height, when the pumping pressure of one concrete conveying pump 3 can not meet the pouring requirement, one concrete conveying pump 3 can be erected on a bearing platform at the bottom of the structure, and the concrete pouring of the large-span high pier is realized in a relay pump mode. The method is suitable for being used in the canyon region, the cross-river cableway bridge 1 can be used as a temporary construction measure, so that the problem that personnel pass is solved, and the problem that a construction channel on one side of the bridge cannot reach an operation surface and expand construction due to limitation of terrain can be solved.

The utility model provides a concrete conveying system for canyon district construction bridge mainly comprises ropeway bridge 1, concrete mixing plant 2, concrete pump 3 and conveyer pipe 4.

The bridge abutments 106 at two ends of the ropeway bridge 1 are respectively arranged at two sides of the canyon, and the ropeway bridge 1 is arranged below the bridge to be built; the concrete mixing plant 2 and the concrete delivery pump 3 are arranged at one end of the cableway bridge 1; the concrete delivery pump 3 is connected with one end of the delivery pipe 4; the conveying pipe 4 is arranged on the bridge deck 108 of the cableway bridge 1, the other end of the conveying pipe 4 extends to a construction working face, and concrete pumping and pouring of the opposite-shore structure are completed by arranging the conveying pipe 4 on the cableway bridge 1. The concrete conveying system overcomes the terrain limitation of canyon regions by means of the spanning capability of the cableway bridge 1, and solves the problems of personnel passing and concrete pouring under the condition that a construction pavement cannot reach a construction working face.

In order to achieve better technical results, the preferred embodiments described below may be preferred in the practice of the present invention.

Preferably, the cableway bridge 1 used in the concrete conveying system comprises an anchoring cable 101, a bearing cable 102, a stabilizing cable 103, a wind cable 104, a stabilizing beam 105, a bridge abutment 106, a cable saddle 107 and a bridge deck 108; the bearing cable 102 and the stabilizing cable 103 are fixed by steel wire ropes with the diameter phi of 42mm, and the standard value of the tensile strength of the steel wire ropes is 1960 Mpa; the anchoring cables 101 are fixed in a rock anchoring manner.

The ropeway bridge 1 has the advantages of simple structure, light dead weight and low construction cost, the structure of the ropeway bridge 1 adopts the lightest suspension cable structure in the bridge structure, the tensile property of high-strength materials is fully utilized, and the ropeway bridge has light dead weight and strong spanning capability. The structural form can realize one-time cable releasing and tensioning, overcomes the defects of complex construction process and high construction risk of the traditional suspension bridge, and can reduce material investment and shorten the progress of engineering by adopting the structure.

Preferably, the bearing cable 102 and the stabilizing cable 103 are connected with the anchor cable 101 by a wire rope connector and are fixed by a U-shaped buckle.

As a preferred scheme, one set or two sets or three sets or more than three sets of conveying pipes 4 are arranged on the bridge deck 108 of the ropeway bridge 1; when one set of the conveying pipe 4 is laid, the conveying pipe is arranged at the center of the ropeway bridge 1; when two sets of the conveying pipes are arranged, the conveying pipes 4 are respectively arranged on two sides of the ropeway bridge 1; when more than 3 sets of conveying pipes are arranged, the conveying pipes 4 are uniformly distributed on the bridge floor 108.

In practice, the number of sets of conveying pipes 4 can be increased or decreased according to the actual requirements of production and construction (one set of conveying pipes 4 is correspondingly connected with one concrete conveying pump 3); care should be taken to maintain a balanced distribution of forces on the deck 108 when laying the transport pipe 4. The delivery pipe 4 laid on the bridge deck 108 is fixed by a buckle device to prevent the delivery pipe 4 from sliding laterally, and the layout of the delivery pipe 4 can be changed conveniently and quickly.

A specific embodiment of the present invention will be described below.

In this embodiment, the concrete mixing plant 2 is arranged on the right bank of the canyon, the concrete mixing plant 2 is provided with two concrete delivery pumps 3, two sets of delivery pipes 4 are arranged on the bridge deck 108 (close to two sides of the bridge deck 108) of the cableway bridge 1, and the two delivery pipes 4 are respectively connected with one concrete delivery pump 3 at the pipe orifice of the right bank of the cableway bridge 1.

The ropeway bridge 1 in the embodiment has the bridge length 245m and the width 2 m. The cableway bridge 1 mainly comprises an anchoring cable 101, a bearing cable 102, a stabilizing cable 103, a wind cable 104, a steel truss girder (stabilizing girder 105), a bridge abutment 106, a cable saddle 107, a bridge deck 108 and the like. Wherein the bearing cables 102 are provided with 11 cables, the stabilizing cables 103 are provided with 2 cables, and the wind cable cables are provided with 4 groups (two are 1 group, and the total number is 8). In the embodiment, the bearing cable 102 of the cableway bridge 1 is a steel wire rope with the diameter of phi 42mm and the tensile strength standard value of 1960 Mpa; and the stabilizing cable 103 and the bearing cable 102 on both sides of the ropeway bridge 1 are made of the same standard steel wire rope. The wind cable is adopted: the wire rope with the specification of phi 24-6 x 37+ FC-1770 is in an airborne parabola shape.

The two ends of each bearing rope 102 and stabilizing rope 103 are respectively connected with 1 anchoring rope 101 through a steel wire rope connector. The anchoring cable 101 adopts a simple rock anchor structure, and the design requirements are met by the drawing force realized by drilling an anchor hole, penetrating the anchoring cable 101, grouting a duct and the like.

When the embodiment is used for constructing the pier body, along with the gradual rise of the pier body height, when the pumping pressure of one concrete conveying pump 3 cannot meet the pouring requirement, one concrete conveying pump 3 (serving as a relay pump) can be erected on a bearing platform at the bottom of the structure, and the concrete pouring of the large-span high pier is realized in a relay pump mode.

The most time-consuming work in building the embodiment is the building of the ropeway bridge 1; and the ropeway bridge 1 should be constructed by selecting an area with good canyon both-bank rock stratum conditions. The construction of the cableway bridge 1 according to the present embodiment will be briefly described below.

Step one, building the abutment 106: before the bridge abutment 106 of the cableway bridge 1 is excavated, the central axis of the bridge deck 108, the distance between the longitudinal axes of the bridge abutments 106 on both sides and an anchor pit excavation line are accurately measured; after the construction platform 106 of the two-bank abutment is excavated to the surface of the foundation rock, pouring abutment 106 concrete, and simultaneously installing a cable saddle 107 of the stabilizing cable 103 and a cable saddle 107 of the bearing cable 102; the saddle 107 for the load bearing line 102 is positioned on the abutment 106 and the saddle for the stabilizing line 103 is positioned on top of abutment stops 110 on either side of the abutment 106.

Step two, fixing the anchoring rope 101: drilling holes in mountains at two banks, ensuring that each anchoring cable 101 and the corresponding cable saddle 107 are on the same axis, cleaning the holes after drilling, removing oil from the anchoring cables 101 (serving as steel wire ropes of the anchoring cables 101), making weaves, adding a centering bracket 1011, a stirrup ring 1013, an expansion ring 1014 and the like to form anchoring bodies, connecting conical heads at the end parts of the anchoring bodies, inserting the weaved anchoring bodies into the corresponding anchor holes, grouting and sealing the anchor holes, grouting to fill the holes with grout, and arranging an asphalt blocking layer 1012 at the sealing positions; connecting the anchor hole with the anchor cable 101 for sealing protection treatment; after the orifice treatment, the solidification and maintenance period is kept for more than 10 days. The details of the anchoring line 101 in the anchoring opening are shown in fig. 4.

Step three, installing main cables (a bearing cable 102 and a stabilizing cable 103): the left bank and the right bank are respectively provided with a 5T winch, a rope throwing gun and the winches are matched to send a traction steel wire rope to the left bank from the right bank, pulleys are arranged on the main ropes 6 and 7, and the pulleys are connected with the steel wire ropes of the winches on the two banks and used for moving left and right. As the number of the main ropes is large, in order to prevent confusion during rope pulling, each main rope is numbered one by one. The first main rope on the right bank is pulled first, the main rope is pulled to the abutment 106 on the right bank, passes through the hanger wheel of the stabilizing beam 105, and is sequentially connected with the rope saddle 107 sleeve wheel, the steel wire rope connector and the anchoring rope 101 (the connection is also completed on the right bank). And (3) tensioning the part near the rock anchor in an adjustable manner by using a jack, adjusting the tightness of the main cables, and tensioning each main cable to a specified vector to ensure the erection quality of the whole bridge.

Step four, mounting the bridge deck 108: after the main cable is installed, sequentially installing a bridge deck 108 plate and a steel truss girder (a stabilizing girder 105) from one side of the ropeway bridge 1 to the other side, and simultaneously installing wood pressing along the bridge direction; after the above work is completed, the steel pipe guard rail 109 and the protection net can be installed, and the steel truss beam (stabilizing beam 105), the main rope and the forward bridge compressed wood are fixed by the steel wire rope hook hanger rod and the bolt. The steel truss (stabilizing beam 105) fixedly connects the plurality of load-bearing cables 102 and the stabilizing cables 103, and is fixed by using boom bolts.

And completing the steps, and finishing the construction of the ropeway bridge 1. After the ropeway bridge 1 is built, the conveying pipe 4 is laid on the bridge floor 108 to a construction working face according to actual needs. And the connection of the concrete delivery pump 3 and the delivery pipe 4 is completed, and the concrete mixing plant 2 is arranged on the right bank, so that the construction is completed.

Claims (4)

1. A concrete conveying system for constructing a cross-river bridge in a canyon region is characterized in that: the device comprises a cableway bridge, a concrete mixing station, a concrete delivery pump and a delivery pipe; the bridge abutments at two ends of the cableway bridge are respectively arranged on two sides of the canyon, and the cableway bridge is arranged below the bridge to be built; the concrete mixing station and the concrete conveying pump are arranged at one end of the cableway bridge; the concrete delivery pump is connected with one end of the delivery pipe; the conveying pipe is arranged on the bridge floor of the cableway bridge, the other end of the conveying pipe extends to the construction working face, and concrete pumping and pouring of the opposite-shore structure are completed by arranging the conveying pipe on the cableway bridge.

2. The concrete delivery system of claim 1, wherein the concrete delivery system is used for constructing a cross-river bridge in a canyon region, and comprises: the cableway bridge comprises an anchoring cable, a bearing cable, a stabilizing cable, a wind cable, a stabilizing beam, a bridge abutment, a cable saddle and a bridge deck; the bearing cable and the stabilizing cable are fixed by steel wire ropes with the diameter phi of 42mm, and the standard value of the tensile strength of the steel wire ropes is 1960 Mpa; the anchoring cables are fixed in a rock anchoring mode.

3. The concrete delivery system for use in constructing a bridge across rivers in a canyon area of claim 2, wherein: the bearing cable and the stabilizing cable are respectively connected with the anchoring cable by adopting a steel wire rope connector and are fixed by a U-shaped buckle.

4. The concrete delivery system for use in constructing a cross-river bridge in a canyon area of claim 3, wherein: one set or two sets or three sets or more than three sets of conveying pipes are arranged on the bridge deck of the cableway bridge; when one set of the conveying pipe is laid, the conveying pipe is arranged at the center of the ropeway bridge; when two sets of the conveying pipes are arranged, the conveying pipes are respectively arranged on two sides of the ropeway bridge; when three or more sets of the conveying pipes are arranged, the conveying pipes are uniformly distributed on the bridge floor.

Images