CN105839516B - A kind of bridge lateral anti-fall girder apparatus and its construction method - Google Patents

Abstract

The invention discloses a bridge transverse anti-fall beam device and a construction method thereof. The device comprises two transverse anti-fall beam mechanisms respectively arranged at the bottom of two adjacent main beam sections. The main girder is laid out in the transverse bridge direction and the two are symmetrically arranged on the front and rear sides of the upper part of the pier; each horizontal anti-drop beam mechanism includes a bottom fixing plate fixed on the outer wall of the pier, two The upper fixed plate on the upper side and two steel tie rods respectively connected between the bottom fixed plate and the two upper fixed plates; the method includes steps: 1. component factory processing; 2. pier construction and bottom fixed plate installation; 3. Sectional construction of the main beam and installation of the upper fixed plate; 4. Installation of steel tie rods. The invention has the advantages of reasonable design, convenient construction and good use effect, can reduce the impact of earthquakes, prevent beams from falling due to excessive lateral displacement of bridges when earthquakes occur, and can solve various problems existing in existing anti-falling beam devices.

Description

A bridge transverse anti-fall beam device and its construction method

technical field

The invention belongs to the technical field of bridge construction, and in particular relates to a bridge transverse anti-drop beam device and a construction method thereof.

Background technique

In recent years, with the rapid development of bridges and construction projects in my country, various construction projects with new structural forms and functions have emerged. my country has put forward a special mission for bridge projects. Specifically, after strong earthquakes, bridges must still be maintained Basic traffic requirements, which requires the installation of anti-drop beam devices.

Displacement earthquake damage of bridge superstructure is very common in earthquakes, and excessive lateral displacement is one of the main forms of earthquake damage. Excessive lateral displacement will cause misalignment of bridge joints, excessive support movement and damage or even drop of beams, making the bridge unusable. For bridges with single-column piers, this effect is more obvious. Therefore, when an earthquake occurs, it is particularly important to limit the lateral displacement of the bridge to ensure the normal use of the bridge.

At present, most of the bridge anti-falling beam devices used rely on the cooperation of the anti-collision block arranged on the cap platform and arranged in the direction of the horizontal bridge with the upward anti-falling beam device of the longitudinal bridge to prevent the beam from falling, that is to say The upward direction of the horizontal bridge mainly relies on the anti-collision block to prevent the beam from falling, while the upward direction of the vertical bridge adopts the anti-falling beam device set between the beams or between the beams and the pier to limit the beam body, and the upward anti-falling beam of the longitudinal bridge The device generally adopts the method of welding the rigid steel frame on the pre-embedded steel plate embedded in the beam and pier. The above-mentioned anti-fall beam device for the longitudinal bridge has complex structure, high cost, inconvenient construction, low reliability, and limited beam capacity. Defects such as longitudinal expansion and deformation of the body under normal conditions. The above-mentioned method of relying on the anti-collision block to prevent the cross bridge from falling to the beam has the following defects and deficiencies: first, the reliability is not high: when the earthquake intensity level is high, the anti-collision block cannot play an effective anti-fall beam. Second, it is easy to be damaged: when an earthquake occurs, the anti-collision block arranged in the direction of the cross bridge is often damaged due to collision, so that it cannot really play the role of anti-fall beam; Time-consuming, and the input cost is higher.

Contents of the invention

The technical problem to be solved by the present invention is to provide a bridge transverse anti-drop beam device for the above-mentioned deficiencies in the prior art. When the earthquake occurs, the bridge lateral displacement is too large to cause the beam to fall, and it can solve the problems of the existing anti-fall beam device such as easy damage, low reliability, and high investment cost.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a bridge transverse anti-fall beam device, which is characterized in that it includes two transverse anti-fall beam mechanisms respectively arranged at the bottom of two adjacent main girder sections, two The two horizontal anti-fall beam mechanisms are arranged along the transverse bridge direction of the main beam, and the two horizontal anti-fall beam mechanisms are symmetrically arranged on the front and rear sides of the upper part of the pier; the main beam is composed of multiple main beam segments along the longitudinal direction. The bridge is spliced from front to back;

Each of the transverse anti-fall beam mechanisms includes a bottom fixed plate fixed on the outer wall of the pier, two upper fixed plates symmetrically arranged above the left and right sides of the bottom fixed plate and two respectively connected to the bottom fixed plate and the two The steel tie rods between the upper fixing plates, the two upper fixing plates are symmetrically arranged on the left and right sides of the bottom of the main beam section, the two steel tie rods are symmetrically arranged and both are located outside the bottom fixing plate; The bottom fixed plate is arranged vertically, and the two upper fixed plates are arranged horizontally; each of the steel tie rods is connected with the bottom fixed plate and the upper fixed plate in a hinged manner, and the bottom fixed plate There are two left and right lower hinged shafts installed on the upper side respectively for the lower ends of the two steel tie rods. The two lower hinged shafts are symmetrically arranged and both are arranged parallel to the bottom fixing plate. The two lower hinged shafts Arranged on the same vertical plane, each of the lower hinged shafts is arranged vertically to the steel tie rods it is connected to; an upper hinged shaft for installing the upper ends of the steel tie rods is installed under the two upper fixing plates. The upper hinge shaft is arranged horizontally and along the longitudinal bridge direction of the main girder; the lower end of each of the steel tie rods is a lower connection end for connecting with the lower hinge shaft, and the lower connection end is There is a lower installation hole for the lower hinge shaft to be installed, and the lower installation hole is a round hole; the upper end of each steel tie rod is an upper connection end for connecting with the upper hinge shaft, and the upper connection end There is an upper installation hole for the installation of the upper hinge shaft, and the upper installation hole is a long hole; the upper connection end and the lower connection end are arranged vertically, and the long hole is arranged horizontally And it is arranged along the transverse bridge direction of the main girder.

The above-mentioned horizontal anti-fall beam device for a bridge is characterized in that: the two horizontal anti-fall beam mechanisms are arranged vertically; the two upper fixing plates in each of the horizontal anti-fall beam mechanisms are arranged on the same vertical plane, and the two steel tie rods in each of the transverse anti-fall beam mechanisms are arranged on the same vertical plane.

The above-mentioned horizontal anti-drop beam device for a bridge is characterized in that: the steel tie rod is an inclined straight bar that gradually inclines from top to bottom, and the angle between the steel tie rod and the horizontal plane is 30° to 60° .

The above-mentioned horizontal anti-fall beam device for a bridge is characterized in that: the cross-section of the bridge pier is rectangular; The two transverse anti-fall beam mechanisms are respectively the front side anti-fall beam mechanism and the rear side anti-fall beam mechanism located on the front and rear sides of the upper part of the bridge pier. The spacing between the steel tie rods of the rear anti-fall beam mechanism and the rear side wall of the pier is smaller than the width of the expansion joints set on the main girder.

The above-mentioned horizontal anti-drop beam device for a bridge is characterized in that: the main girder segment is a reinforced concrete beam arranged horizontally, and the pier is a reinforced concrete pier arranged vertically;

The upper fixing plate is fixed on the bottom of the main beam section through a plurality of upper anchor bolts, and the upper anchor bolts are arranged vertically; the bottom fixing plate is fixed on the pier through a plurality of lower anchor bolts, and the lower anchor bolts The bolts are arranged horizontally and vertically to the bottom fixing plate.

The above-mentioned horizontal anti-drop beam device for a bridge is characterized in that: the depth at which the upper anchor bolt is anchored into the main beam segment is 10 cm to 20 cm, and the depth at which the lower anchor bolt is anchored into the pier is 10 cm to 20 cm.

The above-mentioned horizontal anti-drop beam device for a bridge is characterized in that: the bottom fixing plate is provided with two lower hinged seats on the left and right for the installation of the two lower hinged shafts respectively, and the two lower hinged seats are symmetrically arranged ; Each of the lower hinged seats includes two lower hinged lugs arranged in parallel, and the two lower hinged lugs are straight steel plates arranged in parallel with the installed lower hinged shaft. The hinged lugs are all welded and fixed on the bottom fixing plate and both are arranged vertically with the bottom fixing plate; a circular hole is opened on the two lower hinged lugs for the installation of the lower hinge shaft, and the lower hinge shaft A lower limit nut is coaxially installed at both ends of the two ends respectively, and the two lower limit nuts are respectively located outside the two lower hinge lugs;

The bottom of the upper fixing plate is provided with an upper hinge seat for mounting the upper hinge shaft, and the upper hinge seat includes two upper hinge lugs arranged in parallel, and the two upper hinge lugs are arranged along the main girder. The horizontal bridge is laid out and both are straight steel plates welded and fixed on the upper fixing plate, and the two upper hinged ear plates are arranged vertically; the two upper hinged ear plates are all opened with A round hole for installing the upper hinge shaft. An upper limit nut is installed coaxially on both ends of the upper hinge shaft, and the two upper limit nuts are respectively located outside the two upper hinge lugs.

The above-mentioned horizontal anti-drop beam device for a bridge is characterized in that: both the bottom fixing plate and the upper fixing plate are rectangular steel plates.

At the same time, the invention also discloses a construction method of bridge transverse anti-drop beam device with simple method steps, reasonable design, convenient construction and good use effect. The method is characterized in that the method includes the following steps:

Step 1, component factory processing: the bottom fixing plates, the two upper fixing plates, the two steel tie rods, the upper hinge shaft and the lower hinge shaft of the two transverse anti-fall beam mechanisms are respectively processed in the processing factory , and fix two of the lower hinged seats on the bottom fixed plate formed by processing, and fix one of the upper hinged seats on the two upper fixed plates formed by processing;

Step 2: Bridge pier construction and bottom fixing plate installation: carry out construction on the bridge pier, and during the construction process of the bridge pier, install a bottom that was processed in step 1 and has two lower hinged seats on the upper, front, and rear sides of the bridge pier respectively. fixed plate;

Before installing any one of the bottom fixing plates, first install a plurality of the lower anchor bolts on the installed bottom fixing plate, and anchor the plurality of lower anchor bolts into the pier;

Step 3, construction of the main girder section and installation of the upper fixing plate: constructing the two adjacent main girder sections respectively, and making the two main girder sections supported on the pier described in step 2, And at the bottom of each main beam segment, the upper fixing plate processed and formed in the left and right steps and with the upper hinge seat is installed;

Step 4, installation of steel tie rods: install the four steel tie rods of the two horizontal anti-fall beam mechanisms respectively; after the installation of the four steel tie rods is completed, complete the two horizontal anti-fall beam mechanisms the construction process;

When installing any one of the steel tie rods, first install the upper hinge shaft and the lower hinge shaft on the upper connecting end and the lower connecting end of the installed steel tie rod, and then connect the upper hinge shaft and the lower hinge The shafts are respectively installed on the upper hinge seat described in step three and the lower hinge seat described in step two.

The above-mentioned method is characterized in that: the main beam segment described in step 3 is a reinforced concrete prefabricated beam prefabricated in the prefabrication field;

In step 3, when the two adjacent main beam sections are respectively constructed, it is only necessary to use hoisting equipment to hoist the two main beam sections in place;

During the prefabrication process of the two main beam sections, the upper fixing plate processed and formed in the first two steps and having the upper hinge seat is installed at the bottom of each main beam section respectively; for the upper fixing plate Before installation, a plurality of upper anchor bolts are installed on the installed upper fixing plate, and all the plurality of upper anchor bolts are anchored into the main beam section.

Compared with the prior art, the present invention has the following advantages:

1. The bridge transverse anti-drop beam device adopted has a simple structure, reasonable design, low input cost, and saves materials.

2. The design of the horizontal anti-fall beam device of the bridge is reasonable, mainly including two horizontal anti-fall beam mechanisms arranged at the bottom of two adjacent main girder sections respectively. The layout is carried out in the bridge direction and the two are symmetrically arranged on the front and rear sides of the upper part of the pier; the horizontal anti-drop beam mechanism includes a bottom fixed plate fixed on the outer wall of the pier, and two upper fixed plates symmetrically arranged above the left and right sides of the bottom fixed plate and two steel tie rods respectively connected between the bottom fixed plate and the two upper fixed plates. The actual processing is simple, the input cost is low, and the assembly and disassembly are easy.

3. The steel tie rod is connected with the bottom fixing plate and the upper fixing plate in a hinged manner. The lower connection end of the steel tie rod has a lower installation hole for the lower hinge shaft to be installed. The lower installation hole is a round hole; the steel tie rod Have the upper mounting hole for the upper hinged shaft to install on the upper connecting end, the upper mounting hole is a strip hole. In actual use, the steel tie rods can freely rotate on the upper hinge shaft and the lower hinge shaft, and can move longitudinally for a certain length on the upper hinge shaft, thus not affecting the longitudinal deformation of the main girder. Moreover, the longitudinal displacement of the main girder segment can be limited through the limiting function of the upper limit nut, so it also has the function of preventing the beam from falling in the longitudinal bridge direction.

4. The horizontal anti-fall beam device of the bridge adopted is not easy to be damaged, and in general, only the deformation of the steel tie rods may occur. It only needs to replace the steel tie rods, which saves labor and time, and the investment cost is high. easy.

5. The construction method has simple steps, reasonable design, convenient construction, and easy control of construction quality. It only needs to fix the bottom fixed plate on the side of the pier, and fix the upper fixed plate at the bottom of the main girder section, and then connect the bottom fixed plate and the upper fixed plate It can be hinged by steel tie rods.

6. The use effect is good and the practical value is high. It can effectively buffer the impact force of the earthquake on the beam body, and can prevent the beam body from falling during the earthquake. At the same time, it can effectively increase the lateral stiffness of the beam body. In actual use, it can effectively ensure the lateral deformation and displacement of the bridge under normal use, and at the same time ensure that the seismic force can be effectively transmitted to the bridge piers under the action of earthquake load or other large lateral loads, so that the main The beam will not experience excessive lateral displacement or even lateral drop of the beam. The utility model has the advantages of simple structure, low cost and convenient manufacture and installation, and is an effective safety guarantee measure for bridges during earthquakes. In addition, the present invention solves the problem of excessive lateral displacement of the bridge and falling beams during an earthquake, and at the same time ensures that the lateral displacement of the bridge support is within the allowable range, avoiding damage to the bridge support due to excessive displacement, and can It can effectively limit the lateral displacement of the main girder of the bridge, and can effectively prevent the bridge from falling horizontally (that is, the beam falling from the transverse bridge). Moreover, to a certain extent, it has the function of preventing the vertical beam falling (that is, the vertical bridge falling beam), and the function is perfect and economical to use. At the same time, the normal longitudinal deformation and lateral deformation of the main beam segment will not be restricted.

To sum up, the present invention is reasonable in design, simple in construction and good in use effect, can effectively reduce the impact of earthquakes, prevent beams from falling due to excessive lateral displacement of bridges when earthquakes occur, and can solve the problems existing in existing anti-falling beam devices. Damage, low reliability, high input costs and other issues.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a reference diagram of the use state of the horizontal bridge anti-drop beam device of the present invention in the transverse bridge direction.

Fig. 2 is a reference diagram of the vertical bridge direction use state of the bridge transverse fall prevention beam device of the present invention.

Fig. 3 is a structural schematic diagram of the lateral anti-fall beam mechanism of the present invention.

Fig. 4 is a schematic diagram of the side structure of the lateral anti-fall beam mechanism of the present invention.

Fig. 5 is a structural schematic diagram of the steel tie rod of the present invention.

Fig. 6 is a structural schematic diagram of the upper connection end, the lower connection end and the lower installation hole of the steel tie rod of the present invention.

Fig. 7 is a flow chart of the construction method of the present invention.

Explanation of reference signs:

1—upper fixing plate; 2—bottom fixing plate; 3—steel tie rod;

4—upper mounting hole; 5—lower mounting hole; 6—lower anchor bolt;

7—upper anchor bolt; 8—main girder segment; 9—bridge pier;

10—support; 11—transverse anti-drop beam mechanism; 12—lower hinge shaft;

13—upper hinge shaft; 14—expansion joint; 15—lower hinge ear plate;

16—upper hinged ear plate; 17—lower limit nut; 18—upper limit nut;

19—pull bar rod body.

detailed description

A kind of bridge transverse anti-drop beam device shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4 comprises two transverse anti-fall beam mechanisms 11 respectively arranged at the bottoms of two adjacent girder sections 8, two The horizontal anti-fall beam mechanism 11 is arranged along the transverse bridge direction of the main beam, and the two horizontal anti-fall beam mechanisms 11 are symmetrically arranged on the front and rear sides of the top of the pier 9; the main beam is composed of a plurality of main beam segments 8 are spliced from front to back along the longitudinal bridge direction.

Each of the transverse anti-fall beam mechanisms 11 includes a bottom fixed plate 2 fixed on the outer wall of the pier 9, two upper fixed plates 1 symmetrically arranged above the left and right sides of the bottom fixed plate 2 and two respectively connected to the bottom The steel tie rods 3 between the fixed plate 2 and the two upper fixed plates 1, the two upper fixed plates 1 are symmetrically arranged on the left and right sides of the bottom of the main beam segment 8, and the two steel tie rods 3 are symmetrical and both are located outside the bottom fixing plate 2; the bottom fixing plate 2 is arranged vertically, and the two upper fixing plates 1 are arranged horizontally; each of the steel tie rods 3 is connected with the bottom fixing plate 2 and the upper The fixing plates 1 are all connected in a hinged manner, and the bottom fixing plate 2 is equipped with two lower hinge shafts 12 respectively for the lower ends of the two steel tie rods 3 to be installed, and the two lower hinge shafts 12 are in the form of Symmetrically arranged and both of them are arranged parallel to the bottom fixing plate 2, the two lower hinged shafts 12 are arranged on the same vertical plane, and each of the lower hinged shafts 12 is arranged vertically to the steel tie rod 3 connected to it An upper hinged shaft 13 for installation on the upper end of the steel tie rod 3 is installed below the two upper fixing plates 1, and the upper hinged shaft 13 is arranged horizontally and arranged along the longitudinal bridge direction of the main girder; combined Fig. 5 and Fig. 6, the lower end of each said steel tie rod 3 is the lower connecting terminal used for connecting with the lower hinged shaft 12, said lower connected terminal is provided with a lower mounting hole for the lower hinged shaft 12 to be installed 5. The lower mounting hole 5 is a round hole; the upper end of each of the steel tie rods 3 is an upper connecting end for connecting with the upper hinge shaft 13, and the upper connecting end is provided with an upper hinge shaft The upper mounting hole 4 installed in 13, the upper mounting hole 4 is a long strip hole; the upper connection end and the lower connection end are vertically arranged, and the long strip hole is arranged horizontally and along the The horizontal bridge direction of the main girder is laid out.

In this embodiment, the steel tie rod 3 is composed of a tie rod body 19 and the upper connection end and the lower connection end respectively connected to the upper and lower ends of the tie rod body 19, the tie rod body 19 is a cylindrical rod, and the upper connection Both the end head and the lower connection end are connection ends formed by flattening the two ends of the cylindrical rod.

In this embodiment, the two horizontal anti-fall beam mechanisms 11 are arranged vertically; the two upper fixing plates 1 in each of the horizontal anti-fall beam mechanisms 11 are arranged on the same vertical plane , and the two steel tie rods 3 in each of the transverse anti-drop beam mechanisms 11 are arranged on the same vertical plane.

During actual construction, the steel tie rod 3 is an inclined straight rod that gradually inclines from top to bottom, and the included angle between the steel tie rod 3 and the horizontal plane is 30°-60°.

In this embodiment, the angle between the steel tie rod 3 and the horizontal plane is 45°. During actual construction, the angle between the steel tie rod 3 and the horizontal plane of 30° can be adjusted accordingly according to specific needs.

In this embodiment, the cross-section of the bridge pier 9 is rectangular; the bottom fixing plates 2 of the two transverse anti-fall beam mechanisms 11 are respectively attached to and fixed on the front and rear side walls of the bridge pier 9, and the two transverse anti-fall beam mechanisms 11 The falling beam mechanism 11 is respectively the front side anti-falling beam mechanism and the rear side anti-falling beam mechanism located at the front and rear sides of the pier 9 top, the steel tie rod 3 of the front side anti-falling beam mechanism and the front side wall of the pier 9 The spacing and the spacing between the steel tie rod 3 of the rear anti-drop beam mechanism and the rear side wall of the pier 9 are smaller than the width of the expansion joint 14 provided on the main girder.

Wherein, the width of the expansion joint 14 is the distance between two adjacent main beam segments 8 . The distance between the steel tie rod 3 of the front side anti-fall beam mechanism and the front side wall of the pier 9 is the distance between the central axis of the steel tie rod 3 of the front side anti-fall beam mechanism and the front side wall of the pier 9 , the distance between the steel tie rod 3 of the rear side anti-fall beam mechanism and the rear side wall of the pier 9 is between the central axis of the steel tie rod 3 of the rear side anti-fall beam mechanism and the rear side wall of the pier 9 spacing.

In this embodiment, the bottom of the pier 9 is provided with two front and rear supports 10 for respectively supporting two adjacent main girder segments 8 .

Moreover, the support 10 is a permanent support.

In this embodiment, the main girder section 8 is a reinforced concrete beam arranged horizontally, and the pier 9 is a reinforced concrete pier arranged vertically;

The upper fixing plate 1 is fixed on the bottom of the main beam section 8 through a plurality of upper anchor bolts 7, and the upper anchor bolts 7 are arranged vertically; the bottom fixing plate 2 is fixed on the bridge pier through a plurality of lower anchor bolts 6 9, the lower anchor bolt 6 is arranged horizontally and it is arranged vertically with the bottom fixing plate 2.

In this embodiment, both the bottom fixing plate 2 and the upper fixing plate 1 are rectangular steel plates.

During actual processing, the bottom fixing plate 2 and the upper fixing plate 1 can also be steel plates of other shapes.

In this embodiment, the depth at which the upper anchor bolt 7 is anchored into the main beam segment 8 is 10 cm to 20 cm, and the depth at which the lower anchor bolt 6 is anchored into the pier 9 is 10 cm to 20 cm.

Moreover, in the actual construction process, the depth at which the upper anchor bolt 7 is anchored into the main beam segment 8 and the depth at which the lower anchor bolt 6 is anchored into the pier 9 can be adjusted accordingly according to specific needs.

In this embodiment, the bottom fixing plate 2 is provided with two left and right lower hinge seats respectively for the installation of the two lower hinge shafts 12, and the two lower hinge seats are arranged symmetrically; each of the lower hinge The seats all include two lower hinged lugs 15 arranged in parallel. Both are welded and fixed on the bottom fixing plate 2 and both are arranged vertically with the bottom fixing plate 2; a round hole for the lower hinge shaft 12 is opened on the two lower hinge lugs 15, and the lower hinge The two ends of the shaft 12 are respectively coaxially equipped with a lower limit nut 17, and the two lower limit nuts 17 are respectively located outside the two lower hinge lugs 15;

The bottom of the upper fixing plate 1 is provided with an upper hinge seat for the installation of the upper hinge shaft 13. The upper hinge seat includes two upper hinge lugs 16 arranged in parallel, and the two upper hinge lugs 16 are arranged along the The cross-bridge direction of the main girder is arranged and both are straight steel plates welded and fixed on the upper fixing plate 1, and the two upper hinged ear plates 16 are arranged vertically; A circular hole for the upper hinge shaft 13 to be installed is opened on the ear plate 16, and an upper limit nut 18 is coaxially installed on the two ends of the upper hinge shaft 13 respectively, and the two upper limit nuts 18 are respectively located on two The outer side of the upper hinge lug 16 .

As shown in Figure 7, a construction method is carried out to the bridge transverse anti-drop beam device, comprising the following steps:

Step 1, component factory processing: the bottom fixed plate 2, the two upper fixed plates 1, the two steel pull rods 3, the upper hinge shaft 13 and the lower The hinge shafts 12 are respectively processed, and two lower hinge seats are fixed on the processed and formed bottom fixing plate 2, and one of the upper hinge seats is respectively fixed on the two processed and formed upper fixing plates 1;

Step 2: Bridge pier construction and bottom fixing plate installation: carry out construction on the bridge pier 9, and during the construction process of the bridge pier 9, install one on the front and rear sides of the upper part of the bridge pier 9, which is processed in step one and has two lower hinges. The bottom fixing plate 2 of the seat;

Before installing any one of the bottom fixing plates 2, first install a plurality of the lower anchor bolts 6 on the installed bottom fixing plate 2, and anchor a plurality of the lower anchor bolts 6 into the pier 9;

Step 3, construction of main beam sections and installation of upper fixing plate: construction is carried out on two adjacent main beam sections 8 respectively, and the two main beam sections 8 are all supported on the pier mentioned in step 2 9, and at the bottom of each main beam segment 8, the upper fixing plate 1 that is processed and formed in the left and right steps and has the upper hinge seat is installed;

Step 4, installation of steel tie rods: install the four steel tie rods 3 of the two lateral anti-fall beam mechanisms 11 respectively; after the installation of the four steel tie rods 3 is completed, complete the The construction process of drop beam mechanism 11;

When any one of the steel tie rods 3 is installed, the upper hinge shaft 13 and the lower hinge shaft 12 are respectively installed on the upper connecting end and the lower connecting end of the installed steel tie rod 3, and then the upper hinge The shaft 13 and the lower hinge shaft 12 are respectively installed on the upper hinge seat described in step three and the lower hinge seat described in step two.

In this embodiment, the main girder segment 8 described in step 3 is a reinforced concrete prefabricated beam prefabricated in the prefabrication field;

In step 3, when the two adjacent main beam segments 8 are respectively constructed, it is only necessary to use hoisting equipment to hoist the two main beam segments 8 in place;

During the prefabrication process of the two main beam segments 8, the upper fixing plate 1 that is processed and formed in the first step and has the upper hinge seat is installed at the bottom of each of the main beam segments 8; Before the upper fixing plate 1 is installed, a plurality of upper anchor bolts 7 are installed on the installed upper fixing plate 1 , and all of the plurality of upper anchor bolts 7 are anchored into the main beam segment 8 .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (8)

1. a kind of bridge lateral anti-fall girder apparatus, it is characterised in that：Two neighboring girder sections (8) is laid in respectively including two The horizontal girder falling mechanism (11) of bottom, two horizontal girder falling mechanisms (11) are laid along the direction across bridge of girder, Two horizontal girder falling mechanisms (11) are symmetrically laid in both sides before and after bridge pier (9) top；The girder is by multiple girder sections Section (8) is along vertical bridge to being spliced from front to back；

Each described horizontal girder falling mechanism (11) include being fixed on bottom fixed board (2) on bridge pier (9) lateral wall, two The symmetrical top tie plate (1) being laid in above bottom fixed board (2) left and right sides and two are connected to bottom fixed board (2) reinforcing pull rod (3) and between two top tie plates (1), two top tie plates (1) are symmetrically laid in girder The bottom left and right sides of sections (8), two reinforcing pull rods (3) are in symmetrical laying and the two is respectively positioned on bottom fixed board (2) outward Side；The bottom fixed board (2) is in horizontal layout in laying vertically, two top tie plates (1)；Each described steel draws It is attached in hinged way between bar (3) and bottom fixed board (2) and top tie plate (1), the bottom fixed board (2) On left and right two be installed hold jointed shaft (12) for two reinforcing pull rod (3) lower ends peaces respectively, two it is described under be hinged Axle (12) in it is symmetrical lay and the two with bottom fixed board (2) in parallel laying, two lower jointed shafts (12) are laid in On same perpendicular, reinforcing pull rod (3) perpendicular laying that each described lower jointed shaft (12) is connected with it；Described in two Top tie plate (1) lower section is mounted on a upper jointed shaft (13) installed for reinforcing pull rod (3) upper end, the upper jointed shaft (13) in horizontal layout and its along the vertical bridge of the girder to being laid；The lower end of each reinforcing pull rod (3) be for The lower connection end being connected with lower jointed shaft (12), is provided with the lower connection end and holds installation for lower jointed shaft (12) peace Hole (5), the lower mounting hole (5) is circular hole；The upper end of each reinforcing pull rod (3) is for being connected with upper jointed shaft (13) Upper connection end, be provided with the upper connection end for upper jointed shaft (13) install upper installing hole (4), the upper installing hole (4) it is elongate holes；The upper connection end and the lower perpendicular laying of connection end, the elongate holes are in horizontal layout And it is laid along the direction across bridge of the girder；

The reinforcing pull rod (3) is tilted towards straight-bar for gradually intilted from top to bottom, and the reinforcing pull rod (3) is and horizontal plane between Angle be 30 °~60 °；

Left and right two is provided with the bottom fixed board (2) is held for two lower jointed shafts (12) peaces respectively and be hinged Seat, two lower hinged seats are in symmetrical laying；Each described lower hinged seat includes two lower hinged ears in parallel laying Plate (15), two it is described under be hinged the flat plate that otic placode (15) is and installs down jointed shaft (12) in parallel laying, two It is individual it is described under be hinged that otic placode (15) is weldingly fixed on bottom fixed board (2) and the two is perpendicular with bottom fixed board (2) Lay；Two it is described under be hinged on otic placode (15) and be provided with the circular hole that the lower jointed shaft of confession (12) is installed, the lower jointed shaft (12) two ends are coaxially installed with a lower position nut (17) respectively, and two lower position nuts (17) are located at two respectively Otic placode (15) outside is hinged under described；

Top tie plate (1) bottom is provided with the upper hinged seat that jointed shaft (13) is installed in a confession, the upper hinged seat Including two in being hinged otic placode (16) in parallel laying, two it is described on be hinged otic placode (16) along the direction across bridge of the girder Laid and both at the flat plate being weldingly fixed on top tie plate (1), two it is described on be hinged otic placode (16) In vertically to laying；Two it is described on be hinged on otic placode (16) and be provided with the circular hole that jointed shaft (13) in a confession is installed, institute The two ends for stating jointed shaft (13) are coaxially installed with a upper limit nut (18), two upper limit nuts (18) point respectively Not Wei Yu two it is described on be hinged otic placode (16) outside.

2. according to a kind of bridge lateral anti-fall girder apparatus described in claim 1, it is characterised in that：Two horizontal girder fallings Mechanism (11) is in vertically to laying；Two top tie plates (1) in each described horizontal girder falling mechanism (11) are It is laid on same vertical plane, and two reinforcing pull rods (3) in each described horizontal girder falling mechanism (11) are laid in On same vertical plane.

3. according to a kind of bridge lateral anti-fall girder apparatus described in claim 1 or 2, it is characterised in that：The horizontal stroke of the bridge pier (9) Rectangular cross-section；The bottom fixed board (2) of two horizontal girder falling mechanisms (11) is close to and is fixed on bridge pier (9) respectively On front-rear side walls, the front side that two horizontal girder falling mechanisms (11) are respectively the both sides before and after bridge pier (9) top is anti-fall Beam mechanism and rear side girder falling mechanism, between the reinforcing pull rod (3) of the front side girder falling mechanism and the front side wall of bridge pier (9) between Away from and spacing between the reinforcing pull rod (3) of the rear side girder falling mechanism and the rear wall of bridge pier (9) be respectively less than the girder The seam at upper set expansion joint (14) is wide.

4. according to a kind of bridge lateral anti-fall girder apparatus described in claim 1 or 2, it is characterised in that：The girder sections (8) It is that, in the reinforced beam of horizontal layout, the bridge pier (9) is in vertically to the reinforced concrete bridge pier laid；

The top tie plate (1) is fixed on girder sections (8) bottom by crab-bolt in multiple (7), and the upper crab-bolt (7) is in perpendicular Directly to laying；The bottom fixed board (2) is fixed on bridge pier (9) by crab-bolt under multiple (6), and the lower crab-bolt (6) is in water Plain cloth sets and itself and bottom fixed board (2) perpendicular laying.

5. according to a kind of bridge lateral anti-fall girder apparatus described in claim 4, it is characterised in that：The upper crab-bolt (7) anchors into The depth of girder sections (8) is 10cm~20cm, and the depth that the lower crab-bolt (6) anchors into bridge pier (9) is 10cm~20cm.

6. according to a kind of bridge lateral anti-fall girder apparatus described in claim 1 or 2, it is characterised in that：The bottom fixed board And top tie plate (1) is rectangular steel plates (2).

7. one kind carries out construction method to bridge lateral anti-fall girder apparatus as claimed in claim 1, it is characterised in that the method bag Include following steps：

Step one, element factory processing：Bottom fixed board (2) in processing factory's horizontal girder falling mechanism (11) described to two, Two top tie plates (1), two reinforcing pull rods (3), upper jointed shaft (13) and lower jointed shafts (12) are added respectively Work, and two lower hinged seats are fixed on the bottom fixed board (2) of machine-shaping, while described in two of machine-shaping A upper hinged seat is fixed on top tie plate (1) respectively；

Step 2, Bridge Pier Construction and bottom fixed board are installed：Bridge pier (9) is constructed, and to bridge pier (9) work progress In, machine-shaping and with two lower hinged seats during both sides are respectively mounted a step one before and after the top of bridge pier (9) Bottom fixed board (2)；

Before being installed to bottom fixed board any one described (2), first installed under multiple on installed bottom fixed board (2) Crab-bolt (6), and the multiple lower crab-bolt (6) is anchored into bridge pier (9)；

Step 3, girder segmental construction and top tie plate are installed：The two neighboring girder sections (8) is applied respectively Work, and two girder sections (8) is supported on bridge pier described in step 2 (9), and in each girder sections (8) bottom is respectively mounted machine-shaping and the top tie plate (1) with the upper hinged seat in two steps one in left and right；

Step 4, reinforcing pull rod are installed：Four reinforcing pull rods (3) of horizontal girder falling mechanism (11) described to two are carried out respectively Install；After the completion for the treatment of that four reinforcing pull rods (3) are respectively mounted, two constructions of the horizontal girder falling mechanism (11) are completed Journey；

When being installed to reinforcing pull rod any one described (3), first in the described upper connection end of installed reinforcing pull rod (3) and described It is respectively mounted jointed shaft (13) and lower jointed shaft (12) on lower connection end, then by upper jointed shaft (13) and lower jointed shaft (12) Under being separately mounted to described in upper hinged seat described in step 3 and step 2 on hinged seat.

8. in accordance with the method for claim 7, it is characterised in that：Girder sections described in step 3 (8) is pre- in precasting yard It is made the armored concrete precast beam of type；

When being constructed respectively to the two neighboring girder sections (8) in step 3, hanging device need to be only used by two institutes State girder sections (8) lifting in place；

Two girder sections (8) are carried out in prefabrication process, install two in each described girder sections (8) bottom respectively Machine-shaping and the top tie plate (1) with the upper hinged seat in step one；Installation is carried out to top tie plate (1) Before, multiple upper crab-bolts (7) are first installed on installed top tie plate (1), and the multiple upper crab-bolt (7) is anchored into girder In sections (8).