Bridge and culvert lengthening side line protection structure and construction method

Abstract

The application relates to the technical field of bridge and culvert construction, and discloses a bridge and culvert lengthening side line protection structure and a construction method, which comprises an existing box-type bridge wing wall, the roadbed soil side of the existing box-type bridge wing wall 1 is provided with an advanced small guide pipe, an installation groove is arranged on the existing box-type bridge wing wall, a corrugated steel plate retaining wall is fixedly installed in the installation groove, a plugging steel plate is fixedly connected to one end of the bottom of the installation groove, and the plugging steel plate and the bottom of the installation groove jointly form an anchoring cavity; the seamless line does not need to be cut, the corrugated steel plate retaining wall is used to replace the existing wing wall part cut by a rope saw, the effective support of the roadbed filling is realized, the support of the roadbed soil free surface formed after the existing wing wall is cut is realized, the construction safety of the lengthened box-type bridge and the operation safety of the line are ensured, the operation of the existing line is not affected, and the defects of long construction period, large investment and speed limit operation requirement of the existing line are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge and culvert construction, in particular to a bridge and culvert lengthening side line protection structure and construction method. BACKGROUND

[0002] With the development of China's economy and society, the transportation capacity of some existing railways is saturated and cannot meet the requirements of passenger and freight transportation in the areas along the lines. Therefore, these railways need to be systematically upgraded and reconstructed to enhance the train receiving, dispatching, coding, decoding and taking and sending capacity. The most effective way of reconstruction is to increase the double line, that is, to build the second line.

[0003] The parallel section of the newly built second line needs to lengthen the existing bridge and culvert. When the railway bridge and culvert are lengthened, the existing line needs to be protected to ensure the operation safety of the existing line. The traditional line protection methods include the D-shaped steel beam method and the combined work beam method. These line protection methods have the disadvantages of long construction period, large investment and requirement of speed limit operation of the existing line. In addition, the seamless line needs to be cut, which seriously affects the operation of the existing line. SUMMARY

[0004] The purpose of the present application is to provide a bridge and culvert lengthening side line protection structure and construction method which does not need to cut the seamless line, uses corrugated steel plate retaining wall to replace the existing wing wall part cut by rope saw, effectively supports the roadbed fill, supports the roadbed soil surface formed after cutting the existing wing wall, ensures the construction safety of the lengthened box-type bridge and the operation safety of the line, does not affect the operation of the existing line, and overcomes the disadvantages of long construction period, large investment and requirement of speed limit operation of the existing line.

[0005] The present application is implemented as follows:

[0006] A bridge and culvert lengthening side line protection structure comprises an existing box-type bridge wing wall, an advanced small guide pipe is arranged on the roadbed soil side of the existing box-type bridge wing wall, an installation slot is formed in the existing box-type bridge wing wall, a corrugated steel plate retaining wall is fixedly installed in the installation slot, a blocking steel plate is fixedly connected to one end of the bottom of the installation slot, and the blocking steel plate and the bottom of the installation slot form an anchoring cavity.

[0007] Further, a positioning guide frame is installed on the slotting working surface of the existing box-type bridge wing wall, and the positioning guide frame is arranged on both sides of the installation slot.

[0008] Further, the blocking steel plate is fixedly connected to one end of the bottom of the installation slot through sealing glue.

[0009] Further, the bottom of the corrugated steel plate retaining wall is fixedly connected to the installation slot through the anchoring fluid in the anchoring cavity after solidification.

[0010] Further, the corrugated steel sheet retaining wall is preferably a fabricated corrugated steel sheet retaining wall.

[0011] The bridge and culvert lengthening side line construction method comprises the following steps:

[0012] Step: inject cement slurry into the roadbed soil near the existing box-type bridge wing wall through the advanced small catheter to solidify the roadbed soil;

[0013] Step: open an installation groove at the set position of the existing box-type bridge wing wall and clean the sundries in the installation groove;

[0014] Step: install the corrugated steel sheet retaining wall in the installation groove;

[0015] Step: install a connecting and plugging steel plate at one end of the bottom of the installation groove to plug the end of the installation groove, and pour anchoring fluid into the installation groove, and after the anchoring fluid solidifies, the corrugated steel sheet retaining wall is anchored.

[0016] Further, in the step, a slotting working surface is cut at the set position of the existing box-type bridge wing wall, and a positioning guide frame for guiding slotting is installed on the working surface, and the installation groove of the existing box-type bridge wing wall is opened under the guiding action of the positioning guide frame.

[0017] Further, in the step, the installed corrugated steel sheet retaining wall is preferably a fabricated corrugated steel sheet retaining wall; after the box-type bridge construction is completed, part of the fabricated corrugated steel sheet retaining wall is removed, water-stable material is filled in the installation groove, cement slurry is injected into the water-stable material by using a grouting advanced small catheter, and the water-stable material is solidified.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] In practical application, the advanced small catheter is used for injecting cement slurry to the roadbed soil close to the existing box type bridge wing wall to a certain depth, solidifying the roadbed, facilitating the water drill to form a hole in the roadbed soil when the installation groove is opened, and taking out the roadbed soil in the drill bit, meanwhile, the soil internal friction angle and cohesion of the solidified roadbed soil are increased, the earth pressure of the roadbed soil on the corrugated steel sheet retaining wall is reduced, and the construction safety of the corrugated steel sheet retaining wall is increased; the fixed installation plugging steel plate is used for plugging the end of the installation groove, and the bottom of the installation groove is enclosed to form an anchoring cavity, so that the anchoring fluid is injected into the anchoring cavity, the corrugated steel sheet retaining wall is anchored after the anchoring fluid is solidified, and the anchoring height of the corrugated steel sheet retaining wall is set by setting the height of the plugging steel plate; the corrugated steel sheet retaining wall is set to replace the function of vertically cutting off the wing wall by the rope saw, and the roadbed soil is blocked; the installation groove is set to connect the fabricated corrugated steel sheet retaining wall and the existing box type bridge wing wall as a whole, facilitating the two to bear force together and bear the earth pressure of the roadbed soil; the present application does not need to cut the seamless line, the corrugated steel sheet retaining wall is used to replace the existing wing wall part cut by the rope saw, has effective support to the roadbed filling, realizes the support to the roadbed soil overhanging surface formed after the existing wing wall is cut, ensures the construction safety of the lengthened box type bridge and the operation safety of the line, does not affect the operation of the existing line, and overcomes the defects of long construction period, large investment and requirement of speed limit operation of the existing line. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 is a front view of a structural schematic diagram of the present application;

[0022] Figure 2 is a top view of a structural schematic diagram of the present application.

[0023] The drawings are as follows: the existing box type bridge wing wall 1; the advanced small catheter 2; the installation groove 3; the corrugated steel sheet retaining wall 4; the plugging steel plate 5; the positioning guide frame 6; the anchoring cavity 7. DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0025] Referring to Figure 1 and Figure 2 A bridge and culvert extension side line protection structure, comprising an existing box type bridge wing wall 1, characterized in that: the roadbed soil side of the existing box type bridge wing wall 1 is provided with an advanced small guide pipe 2, an installation groove 3 is formed in the existing box type bridge wing wall 1, a corrugated steel plate retaining wall 4 is fixedly installed in the installation groove 3, a blocking steel plate 5 is fixedly connected to one end of the bottom of the installation groove 3, and the blocking steel plate 5 and the bottom of the installation groove 3 together enclose an anchoring cavity 7.

[0026] In actual application, the advanced small guide pipe 2 is used to inject cement slurry of a certain depth into the roadbed soil close to the existing box type bridge wing wall 1 to solidify the roadbed. When the installation groove 3 is formed, it is beneficial for the water drill to form a hole in the roadbed soil, and the roadbed soil is taken out of the drill bit. At the same time, the internal friction angle and cohesion of the solidified roadbed soil increase, which reduces the earth pressure of the roadbed soil on the corrugated steel plate retaining wall 4 and increases the construction safety of the corrugated steel plate retaining wall 4. By fixedly installing the blocking steel plate 5, the end of the installation groove 3 is blocked, and the bottom of the installation groove 3 together encloses the anchoring cavity 7, so that the anchoring fluid can be injected into the anchoring cavity 7. After the anchoring fluid solidifies, the corrugated steel plate retaining wall 4 is anchored, and the anchoring height of the corrugated steel plate retaining wall 4 is set by setting the height of the blocking steel plate 5. By setting the corrugated steel plate retaining wall 4, the function of vertically cutting off the wing wall by a rope saw is replaced, and the roadbed soil is blocked. By setting the installation groove 3, the assembled corrugated steel plate retaining wall 4 and the existing box type bridge wing wall 1 are connected as a whole, which is beneficial for the two to bear force together and bear the earth pressure of the roadbed soil. The present application does not need to cut the seamless line, and the corrugated steel plate retaining wall 4 replaces the part of the existing wing wall cut by the rope saw. It has effective support for the roadbed filling, realizes the support for the roadbed soil surface formed after the existing wing wall is cut, ensures the construction safety of the extended box type bridge and the operation safety of the line, does not affect the operation of the existing line, overcomes the shortcomings of long construction period, large investment and requirement of speed limit operation of the existing line.

[0027] Referring toFigure 1 And Figure 2 The positioning guide frame 6 is installed on the slotted working surface of the existing box-type wing wall 1, and is arranged on both sides of the installation slot 3. In this embodiment, by arranging the positioning guide frame 6, the concrete water drill is positioned, the drill bit is ensured to drill into the wing wall horizontally, the reinforced roadbed soil is ensured, the slot is ensured to be vertical and flat, the shape is ensured to be regular, and the installation of the corrugated steel plate retaining wall 4 is facilitated.

[0028] Please refer to Figure 1 And Figure 2 The blocking steel plate 5 is fixedly connected with one end of the bottom of the installation slot 3 through sealing glue. In this embodiment, the blocking steel plate 5 is fixedly connected with the installation slot 3 through sealing glue, so that the blocking steel plate 5 and the bottom of the installation slot 3 form a sealed anchoring cavity 7, and the corrugated steel plate retaining wall 4 is fixedly connected with the installation slot 3.

[0029] Please refer to Figure 1 And Figure 2 The bottom of the corrugated steel plate retaining wall 4 is fixedly connected with the installation slot 3 through the anchoring fluid in the anchoring cavity 7. In this embodiment, the anchoring fluid is preferably self-leveling cement mortar, and the anchoring fluid is solidified to serve as the root anchoring body of the corrugated steel plate retaining wall 4, so that the corrugated steel plate retaining wall 4 is fixedly connected with the installation slot 3, and then is connected with the existing box-type bridge wing wall 1 as a whole, thereby facilitating the two to bear the roadbed soil pressure together.

[0030] Please refer to Figure 1 And Figure 2 The corrugated steel plate retaining wall 4 is preferably a fabricated corrugated steel plate retaining wall 4. In this embodiment, the corrugated steel plate retaining wall 4 with a fabricated structure is convenient to disassemble at the splicing joint after the construction of the box-type bridge (culvert) is completed.

[0031] Please refer to Figure 1 And Figure 2 A bridge and culvert lengthening side line construction method, and the construction method comprises the following specific steps:

[0032] Step 1: A certain depth of cement slurry is injected into the roadbed soil close to the existing box-type bridge wing wall 1 through the advanced small catheter 2, and the roadbed soil is solidified.

[0033] Step 2: An installation slot 3 is arranged at a position of the existing box-type bridge wing wall 1, and the installation slot 3 is cleaned of sundries.

[0034] Step 3: A corrugated steel plate retaining wall 4 is installed in the installation slot 3.

[0035] Step 4: A blocking steel plate 5 is installed at one end of the bottom of the installation slot 3, the end of the installation slot 3 is blocked, an anchoring fluid is poured into the installation slot 3, and the corrugated steel plate retaining wall 4 is anchored after the anchoring fluid is solidified.

[0036] In step 2, a cutting working surface is cut at the set position of the existing box-type bridge wing wall 1, and a positioning guide frame 6 for cutting guide is installed on the working surface, and the existing box-type bridge wing wall 1 is cut to install a groove 3 under the guide of the positioning guide frame 6.

[0037] In step 3, the installed corrugated steel sheet retaining wall 4 is preferably a prefabricated corrugated steel sheet retaining wall 4; in step 4, after the box-type bridge construction is completed, part of the prefabricated corrugated steel sheet retaining wall 4 is removed, and water-stable material is filled in the installation groove 3, and cement slurry is injected into the water-stable material by using the grouting advanced small pipe 2 to solidify the water-stable material.

[0038] The advanced small pipe 2 is inserted into the roadbed soil of the existing box-type bridge wing wall 1 to inject cement slurry to a certain depth to solidify the roadbed soil. A working surface for concrete water drill construction is cut at the set position of the existing box-type bridge wing wall 1 by using a rope saw, and a positioning guide frame 6 is erected on the working surface to position and guide the concrete water drill. The concrete water drill is used to drill from bottom to top to drill an installation groove 3 for installing the prefabricated corrugated steel sheet retaining wall 4, after the installation groove 3 is cleaned of sundries, the prefabricated corrugated steel sheet retaining wall 4 is hoisted and installed in the installation groove 3. A sealing agent is applied on the blocking steel plate 5 and bonded at the end of the installation groove 3 to block the end of the installation groove 3, so that the blocking steel plate 5 and the bottom of the installation groove 3 form a sealed anchoring cavity 7. Anchoring fluid is poured into the anchoring cavity 7, and the anchoring fluid is preferably self-leveling cement mortar. After the anchoring fluid is solidified, the wing wall is cut by using a rope saw to leave space for the extension of the box-type bridge (culvert) construction. After the box-type bridge (culvert) construction is completed, part of the prefabricated corrugated steel sheet retaining wall 4 is removed, water-stable material is filled in the installation groove 3, and cement slurry is injected into the water-stable material by using the grouting advanced small pipe 2 to solidify the water-stable material.

[0039] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for constructing a bridge-culvert lengthening side line, characterized by: The side of the roadbed soil of the existing box type bridge wing wall (1) is provided with an advanced small guide pipe (2), an installation groove (3) is formed in the existing box type bridge wing wall (1), a corrugated steel plate retaining wall (4) is fixedly installed in the installation groove (3), a blocking steel plate (5) is fixedly connected to one end of the bottom of the installation groove (3), and the blocking steel plate (5) and the bottom of the installation groove (3) form an anchoring cavity (7). The construction method comprises the following steps: Step 1: injecting cement slurry of a certain depth into the roadbed soil close to the existing box type bridge wing wall (1) through the advanced small guide pipe (2) to solidify the roadbed soil; Step 2: forming an installation groove (3) at a set position of the existing box type bridge wing wall (1) and cleaning the installation groove (3); Step 3: installing a corrugated steel plate retaining wall (4) in the installation groove (3); Step 4: installing a blocking steel plate (5) at one end of the bottom of the installation groove (3) to block the end of the installation groove (3), pouring anchoring fluid into the installation groove (3), and anchoring the corrugated steel plate retaining wall (4) after the anchoring fluid solidifies; In step 2, a slotting working surface is cut at the set position of the existing box type bridge wing wall (1), and a positioning guide frame (6) for slotting guidance is installed on the working surface, and the positioning guide frame (6) is used to guide the formation of the installation groove (3) in the existing box type bridge wing wall (1); In step 3, the installed corrugated steel plate retaining wall (4) is a fabricated corrugated steel plate retaining wall (4); after the box type bridge construction is completed in step 4, part of the fabricated corrugated steel plate retaining wall (4) is removed, water stable material is filled in the installation groove (3), cement slurry is injected into the water stable material through the grouting advanced small guide pipe (2), and the water stable material is solidified.

2. The method according to claim 1, wherein The positioning guide frame (6) is arranged on both sides of the installation groove (3).

3. The method of claim 1, wherein the method further comprises: The blocking steel plate (5) is fixedly connected to one end of the bottom of the installation groove (3) through sealing glue.

Images