阅读说明：本技术 公路桥梁智能防撞护栏悬空部分的施工方法 (Construction method for suspended part of intelligent anti-collision guardrail of highway bridge ) 是由 张红 户红生 张旭生 曹欢 周航 刘新琳 赵昌军 刘兵兵 张勇君 张冬冬 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种公路桥梁智能防撞护栏悬空部分的施工方法,包括：步骤1、在预制箱梁的外侧设置滑槽；步骤2、将外模板移动至浇筑位置,再支撑部固定在预制箱梁的底端,支撑部的另一端连接至滑槽；支撑部包括：L型支撑杆组,其对称并贴合外模板,设置于外模板外侧的支撑压杆；步骤3、将内模板的定位固定部固定于预制箱梁的顶端,内模板和外模板的顶端两侧设置固定杆；步骤4、将智能防护装置设置在内模板与外模板之间；步骤5、向内模板和外模板构成的空腔内浇筑混凝土,以完成智能防撞护栏悬空部分的施工。本发明通过先利用外模板整体固定定位的方式,降低了劳动强度,提高了施工效率。(The invention discloses a construction method of a suspended part of an intelligent anti-collision guardrail of a highway bridge, which comprises the following steps: step 1, arranging a sliding chute on the outer side of a precast box girder; step 2, moving the outer template to a pouring position, fixing a supporting part at the bottom end of the prefabricated box girder, and connecting the other end of the supporting part to the sliding groove; the support portion includes: the L-shaped support rod groups are symmetrical and attached to the outer template, and the support pressure rods are arranged on the outer side of the outer template; step 3, fixing the positioning fixing part of the inner template on the top end of the precast box girder, and arranging fixing rods on two sides of the top ends of the inner template and the outer template; step 4, arranging the intelligent protection device between the inner template and the outer template; and 5, pouring concrete into a cavity formed by the inner template and the outer template to complete construction of the suspended part of the intelligent anti-collision guardrail. According to the invention, the mode of integrally fixing and positioning the outer template is firstly utilized, so that the labor intensity is reduced, and the construction efficiency is improved.)

1. A construction method for a suspended part of an intelligent anti-collision guardrail of a highway bridge comprises the following steps:

step 1, arranging a sliding chute on the outer side of the prefabricated box girder along the longitudinal direction of the highway; the sliding groove is parallel to the top end of the prefabricated box girder;

step 2, moving the outer template to a pouring position, and fixing one end of a supporting part of the outer template at the bottom end of the prefabricated box girder in a detachable mode, wherein the other end of the supporting part is connected to the sliding groove; wherein the support portion includes: the L-shaped supporting rod group comprises supporting compression rods which are symmetrical and attached to the outer template and arranged on the outer side of the outer template, and the triangular support is arranged on the inner side of the bending part of the supporting compression rods;

step 3, fixing the positioning fixing part of the inner template on the top end of the prefabricated box girder, adjusting the distance between the positioning fixing part and the outer template, and arranging fixing rods on two sides of the top ends of the inner template and the outer template;

step 4, arranging an intelligent protection device between the inner template and the outer template, and enabling the top of the intelligent protection device to be higher than the top ends of the inner template and the outer template by 2-4 cm;

and 5, pouring concrete into a cavity formed by the inner template and the outer template to complete construction of the suspended part of the intelligent anti-collision guardrail.

2. The construction method of the suspended part of the intelligent anti-collision guardrail for the highway bridge as claimed in claim 1, wherein one end of the supporting part is fixedly connected with the prefabricated box girder in a specific way that: the prefabricated box girder is provided with a connecting rod which is opposite to the tail end of the supporting pressure rod and is vertical to the prefabricated box girder, and the connecting rod is fixedly connected with the tail end of the supporting pressure rod through a sleeve.

3. The construction method of the suspended part of the intelligent anti-collision guardrail for the highway bridge as claimed in claim 1, wherein the concrete connection mode of the supporting part and the sliding groove is as follows: the supporting pressure bar is arranged at a position opposite to the sliding groove, is matched with the sliding groove and is clamped and fixed on the pulley in the sliding groove.

4. The construction method of the suspended part of the intelligent anti-collision guardrail of the highway bridge as claimed in claim 1, wherein in step 3, the inner formworks and the positioning and fixing parts are fixedly connected structures, the positioning and fixing parts are symmetrically arranged on the outer sides of the inner formworks, the positioning and fixing parts comprise first supporting rods, second supporting rods, third supporting rods and positioning abutting devices, the first ends of the first supporting rods are perpendicular to the inner formworks and are arranged at the top ends of the inner formworks, the second supporting rods are connected with the second ends of the first supporting rods and are arranged perpendicular to the top ends of the prefabricated box girders, and fixing plates are arranged at the tail ends of the second supporting rods; the third supporting rod is connected to the first end of the first supporting rod and the tail end of the second supporting rod; the positioning and abutting device comprises a pressing plate arranged in the middle of the third supporting rod and a pressing rod connected below the pressing plate, a leakage-proof plate is arranged at the tail end of the pressing rod, and the leakage-proof plate is matched with the joint of the inner template and the precast box girder.

5. The construction method of the suspended part of the intelligent anti-collision guardrail for the road bridge as claimed in claim 4, wherein the pressure plate is a telescopic plate, and the pressure rod and the first support rod are both telescopic rods.

6. The construction method of the suspended part of the intelligent anti-collision guardrail for the road bridge as claimed in claim 4, wherein a roller positioned at the top end of the first strut is arranged at the joint of the first strut and the second strut.

7. The construction method of the suspended part of the intelligent anti-collision guardrail of the highway bridge as claimed in claim 1, wherein the concrete connection mode of the outer template and the supporting compression bar in the step 2 is as follows: the outer die plate is provided with a plurality of clamping rings matched with the supporting pressure rods at positions opposite to the supporting pressure rods, and positioning pins penetrating through the supporting pressure rods and the outer die plate are arranged on the outer sides of the clamping rings.

8. The construction method of the suspended part of the intelligent anti-collision guardrail of the highway bridge as claimed in claim 1, wherein the intelligent protection device comprises:

the protection part comprises a plurality of groups of cavities which are arranged side by side, wherein air cylinders are arranged in the cavities, and the top ends of the air cylinders are connected through the protection rods; the outer sides of the cylinder and the protection rod respectively comprise an inflatable cushion;

the controller is connected to the air cylinder and controls the telescopic length of the air cylinder and the expansion and contraction of the inflatable cushion, and the controller controls the expansion degree of the inflatable cushion according to the elongation of the air cylinder;

the pressure sensing module is arranged on the anti-collision guardrail and used for monitoring the impact force generated when a vehicle is impacted;

and the cylinder extension pre-judging module is connected to the pressure sensing module and is used for transmitting the length of the extended cylinder to the controller through the impact force data transmitted by the pressure sensing module so as to control the extension of the cylinder.

Technical Field

The invention relates to the technical field of building construction, in particular to a construction method for a suspended part of an intelligent anti-collision guardrail of a highway bridge.

Background

The highway bridge adopts the rigid guardrails to strengthen the anti-collision force and reduce the possibility that a vehicle falls into the bridge so as to avoid secondary accidents. The rigid guardrail is a basically non-deformable guardrail structure, the main representative form of the rigid guardrail is a concrete wall guardrail, and for the rigid guardrail, collision energy is absorbed through the change of a wheel rotation angle, the displacement and deformation of a vehicle body and the friction between the vehicle and the guardrail and between the vehicle and the ground. During a collision, the degree of vehicle deformation depends on its own stiffness, collision energy and collision action time. The rigidity guardrail can be divided into concrete wall guardrail, concrete beam column type guardrail and combination formula again according to different structures, need through concrete placement, and the moulding of template obtains, nevertheless is a link comparatively important in the construction always to the fixed of the exterior sheathing in the bridge outside unsettled, is that the anticollision guardrail is located the shaping basis of bridge outside unsettled part, but the location of exterior sheathing is comparatively difficult, dismantles the location repeatedly and great to constructor intensity of labour, and the efficiency of construction is low.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

The invention also aims to provide a construction method of the suspended part of the intelligent anti-collision guardrail of the highway bridge, which reduces the labor intensity and improves the construction efficiency by firstly utilizing the mode of integrally fixing and positioning the outer template.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a method for constructing a suspended portion of an intelligent crash barrier for a road bridge, comprising the steps of:

step 1, arranging a sliding chute on the outer side of the prefabricated box girder along the longitudinal direction of the highway; the sliding groove is parallel to the top end of the prefabricated box girder.

Step 2, moving the outer template to a pouring position, and fixing one end of a supporting part of the outer template at the bottom end of the prefabricated box girder in a detachable mode, wherein the other end of the supporting part is connected to the sliding groove; wherein the support portion includes: l type bracing piece group and A-frame, L type bracing piece group is including the symmetry and laminating the exterior sheathing, set up in the support depression bar in the exterior sheathing outside, A-frame sets up the inboard of the department of buckling of support depression bar.

And 3, fixing the positioning fixing part of the inner template on the top end of the prefabricated box girder, adjusting the distance between the positioning fixing part and the outer template, and arranging fixing rods on two sides of the top ends of the inner template and the outer template.

And 4, arranging an intelligent protection device between the inner template and the outer template, and enabling the top of the intelligent protection device to be higher than the top ends of the inner template and the outer template by 2-4 cm.

And 5, pouring concrete into a cavity formed by the inner template and the outer template to complete construction of the suspended part of the intelligent anti-collision guardrail.

Preferably, one end of the support part is fixedly connected with the precast box girder in a specific manner that: the prefabricated box girder is provided with a connecting rod which is opposite to the tail end of the supporting pressure rod and is vertical to the prefabricated box girder, and the connecting rod is fixedly connected with the tail end of the supporting pressure rod through a sleeve.

Preferably, the concrete connection mode of the supporting part and the sliding groove is as follows: the supporting pressure bar is arranged at a position opposite to the sliding groove, is matched with the sliding groove and is clamped and fixed on the pulley in the sliding groove.

Preferably, in the step 3, the inner formwork and the positioning fixing part are in a fixed connection structure, the positioning fixing parts are symmetrically arranged on the outer side of the inner formwork, each positioning fixing part comprises a first supporting rod, a second supporting rod, a third supporting rod and a positioning abutting device, the first end of the first supporting rod is perpendicular to the inner formwork and is arranged at the top end of the inner formwork, the second supporting rod is connected with the second end of the first supporting rod and is arranged perpendicular to the top end of the prefabricated box girder, and the tail end of the second supporting rod is provided with a fixing plate; the third supporting rod is connected to the first end of the first supporting rod and the tail end of the second supporting rod; the positioning and abutting device comprises a pressing plate arranged in the middle of the third supporting rod and a pressing rod connected below the pressing plate, a leakage-proof plate is arranged at the tail end of the pressing rod, and the leakage-proof plate is matched with the joint of the inner template and the precast box girder.

Preferably, the pressing plate is a telescopic plate, and the pressing rod and the first supporting rod are telescopic rods.

Preferably, the joint of the first supporting rod and the second supporting rod is provided with a roller positioned at the top end of the first supporting rod.

Preferably, in the step 2, the specific connection mode between the outer template and the supporting compression bar is as follows: the outer die plate is provided with a plurality of clamping rings matched with the supporting pressure rods at positions opposite to the supporting pressure rods, and positioning pins penetrating through the supporting pressure rods and the outer die plate are arranged on the outer sides of the clamping rings.

Preferably, the smart guard includes:

the protection part comprises a plurality of groups of cavities which are arranged side by side, wherein air cylinders are arranged in the cavities, and the top ends of the air cylinders are connected through the protection rods; the cylinder and the outside of protective rod all include inflatable packer.

And the controller is connected to the air cylinder and controls the telescopic length of the air cylinder and the expansion and contraction of the inflatable cushion, and the controller controls the expansion degree of the inflatable cushion according to the elongation of the air cylinder.

The pressure sensing module is arranged on the anti-collision guardrail and used for monitoring the impact force generated when a vehicle collides.

And the cylinder extension pre-judging module is connected to the pressure sensing module and is used for transmitting the length of the extended cylinder to the controller through the impact force data transmitted by the pressure sensing module so as to control the extension of the cylinder.

The invention at least comprises the following beneficial effects:

the invention forms the positioning of the external template by arranging the sliding chute at the outer side of the precast box girder, driving the external template to move to the pouring point of the highway bridge along the sliding chute by the supporting pressure rod, and fixing the supporting part on the precast box girder in a detachable way, wherein the supporting part reinforces the whole supporting structure by the triangular bracket at the bending part, the reinforcing supporting pressure rod fixes the external template, after the external template is positioned and fixed, the internal template is arranged relative to the external template, so that the whole template structure is positioned conveniently, and the function of the anti-collision guardrail is reinforced by arranging the intelligent protection device between the internal template and the external template, the internal template is positioned integrally, the external template is positioned integrally, after the positioning and the matching are carried out successively, the molding efficiency is higher, the trouble that the external template needs to be positioned repeatedly each time in the past is avoided, and the labor intensity is reduced, the construction efficiency is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural view of a suspended part of the intelligent anti-collision guardrail of the highway after construction and positioning;

FIG. 2 is a front view of the inner mold plate of the present invention;

fig. 3 is a schematic structural diagram of the intelligent protection device in the invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1, the invention provides a construction method of a suspended part of an intelligent anti-collision guardrail of a highway bridge, which comprises the following steps:

step 1, arranging a sliding chute 10 on the outer side of the precast box girder 1 along the longitudinal direction of the road; the sliding groove 10 is parallel to the top end of the precast box girder 1.

Step 2, moving an outer template 11 to a pouring position, and fixing one end of a supporting part of the outer template 11 at the bottom end of the precast box girder 1 in a detachable mode, wherein the other end of the supporting part is connected to the sliding groove 10; wherein the support portion includes: l type bracing piece group and A-frame 21, L type bracing piece group is including the symmetry and laminating the exterior sheathing 11, set up in the support depression bar 20 in the exterior sheathing 11 outside, A-frame 21 sets up the inboard of the department of buckling of support depression bar 20.

And 3, fixing the positioning fixing part of the inner template 3 on the top end of the precast box girder 1, adjusting the distance between the positioning fixing part and the outer template 11, and arranging fixing rods 30 on two sides of the top ends of the inner template 3 and the outer template 11.

And 4, arranging an intelligent protection device 31 between the inner template 3 and the outer template 11, and enabling the top of the intelligent protection device 31 to be higher than the top ends of the inner template 3 and the outer template 11 by 2-4 cm.

And 5, pouring concrete into a cavity formed by the inner template 3 and the outer template 11 to finish the construction of the suspended part of the intelligent anti-collision guardrail.

In the above scheme, the outer side of the prefabricated box girder 1 is provided with the sliding chute 10, the outer formwork 11 is driven to move to a road bridge pouring point along the sliding chute 10 through the supporting pressure rod 20, then the supporting part is detachably fixed on the prefabricated box girder 1, so as to form the positioning of the outer formwork 11, the supporting part reinforces the whole supporting structure through the triangular bracket 21 at the bending part, the reinforcing supporting pressure rod 20 fixes the outer formwork 11, after the outer formwork 11 is positioned and fixed, the inner formwork 3 is arranged relative to the outer formwork 11, so as to facilitate the positioning of the whole formwork structure, the effect of the anti-collision guardrail is strengthened by arranging the intelligent protection device 31 between the inner formwork 3 and the outer formwork 11, the inner formwork 3 is positioned integrally, the outer formwork 11 is positioned integrally, after successive positioning matching, the molding efficiency is higher, and the trouble that the outer formwork 11 needs to be repeated each time in the past is avoided, the labor intensity is reduced, and the construction efficiency is improved.

In a preferred scheme, a specific mode that one end of the supporting part is fixedly connected with the precast box girder 1 is as follows: the prefabricated box girder 1 is provided with a connecting rod 22 which is opposite to the tail end of the supporting compression bar 20 and is vertical to the prefabricated box girder 1, and the connecting rod 22 is fixedly connected with the tail end of the supporting compression bar 20 through a sleeve 23.

In the above scheme, the connecting rod 22 is arranged on the precast box girder 1, and the connecting rod 22 is connected with the tail end of the supporting compression rod 20 through the sleeve 23, so that the problem that the tail end of the supporting compression rod 20 is directly connected to the precast box girder 1, the length is too long, the curvature is large, and the position of the outer formwork 11 is affected is avoided.

In a preferred embodiment, the concrete connection mode of the supporting portion and the sliding groove 10 is as follows: the supporting pressure bar 20 is arranged at a position opposite to the sliding chute 10, is adapted to the sliding chute 10, and is clamped and fixed on a pulley in the sliding chute 10.

In the above scheme, through the adaptation of the sliding chute 10 and the pulley, when the supporting pressure bar 20 drives the outer template 11 to move to the next pouring point of the highway bridge along the sliding chute 10, the convenience and labor saving are very high.

In a preferable scheme, in step 3, the inner formworks 3 and the positioning and fixing portions are in a fixed connection structure, the positioning and fixing portions are symmetrically arranged on the outer sides of the inner formworks 3, each positioning and fixing portion comprises a first supporting rod 40, a second supporting rod 41, a third supporting rod 42 and a positioning and abutting device, a first end of the first supporting rod 40 is perpendicular to the inner formworks 3 and is arranged at the top end of the inner formworks 3, the second supporting rod 41 is connected with a second end of the first supporting rod 40 and is arranged perpendicular to the top end of the precast box girder 1, and a fixing plate 410 is arranged at the tail ends of the second supporting rods 41; the third strut 42 is connected to the first end of the first strut 40 and the tail end of the second strut 41; the positioning and abutting device comprises a pressing plate 43 arranged in the middle of the third supporting rod 42 and a pressing rod 44 connected below the pressing plate 43, a leakage-proof plate 46 is arranged at the tail end of the pressing rod 44, and the leakage-proof plate 46 is matched with the joint of the inner template 3 and the precast box girder 1.

In the above scheme, as shown in fig. 2, the positioning fixing part and the inner template 3 are provided with the fixed connection structure, and when the inner template 3 is set in the next molding process, the inner template 3 does not need to be installed, combined and positioned again, so that the traditional complex fixing process is reduced, the inner template 3 can be fixed only by positioning and fixing the positioning fixing part, and the overall molding efficiency is improved. Fix a position the fixed plate 410 of second branch 41 bottom through the bolt, make the fixed plate 410 laminating fix on the top of precast box girder 1, through the production reverse bracing power on depression bar 44 and ground for the position of location fixed part is fixed, sets up leak protection plate 46 at the depression bar 44 tail end, not only avoids the concrete to spill over through the suppression power of depression bar 44, has the supporting role to whole location fixed part simultaneously, clamp plate 43 supports with interior sheathing 3 and pushes up, avoids the slope of interior sheathing 3.

In a preferred embodiment, the pressing plate 43 is a retractable plate, and the pressing rod 44 and the first supporting rod 40 are retractable rods.

In the above scheme, the pressing plate 43 is set to be a telescopic plate, so that the width of the pressing plate 43 is finely adjusted after the concrete is poured, and the inner formwork 3 is more tightly propped against the concrete structure; by arranging the compression bar 44 as a telescopic bar, the leakage-proof plate 46 is abutted against the joint of the inner template 3 and the precast box girder 1 by adjusting the length of the compression bar 44, so that the concrete is prevented from overflowing; by providing the first support rod 40 as a telescopic rod, it is convenient to finely adjust the distance between the inner mold plate 3 and the outer mold plate 11 when the fixing plate 410 of the second support rod 41 is fixed to the top end of the precast box girder 1.

In a preferred embodiment, a roller 45 is disposed at the top end of the first supporting rod 40 at the joint of the first supporting rod 40 and the second supporting rod 41.

In the above scheme, set up gyro wheel 45 through the top at first bracing piece 40, the short distance transportation of the interior template 3 of being convenient for inverts interior template 3, through the gyro wheel 45 contact with the gyro wheel 45 on ground, drives the removal of interior template 3 for under the condition that interior template 3 short distance needs the transport, it is more laborsaving.

In a preferred embodiment, the specific connection manner between the outer form 11 and the supporting press rod 20 in step 2 is as follows: a plurality of clamping rings 12 matched with the supporting compression rods 20 are arranged at the positions, opposite to the supporting compression rods 20, of the outer template 11, and positioning pins 13 penetrating through the supporting compression rods 20 and the outer template 11 are arranged on the outer sides of the clamping rings 12.

In the above scheme, the supporting compression rod 20 is inserted into the clamping ring 12 to form connection with the outer template 11, and the outer template 11 is fixed by the positioning pin 13 transversely penetrating through the supporting compression rod 20 and the outer template 11 to be connected with the supporting compression rod 20, so that the connecting structure is simple, the disassembly is convenient, and the outer template 11 can slide under the action of the supporting compression rod 20.

In a preferred embodiment, the smart guard 31 includes:

the protection part comprises a plurality of groups of cavities 32 which are arranged side by side, wherein air cylinders 33 are arranged in the cavities 32, and the top ends of the air cylinders 33 are connected through the protection rods 34; the outside of the cylinder 33 and the guard bar 34 each include an inflatable cushion 35.

And a controller connected to the cylinder 33 and controlling the length of expansion and contraction of the cylinder 33 and the expansion and contraction of the inflatable cushion 35, wherein the controller controls the expansion degree of the inflatable cushion 35 according to the elongation of the cylinder 33.

The pressure sensing module is arranged on the anti-collision guardrail and used for monitoring the impact force generated when a vehicle collides.

And the cylinder 33 expansion and contraction pre-judging module is connected to the pressure sensing module, and the cylinder 33 expansion and contraction pre-judging module is used for transmitting the length of the cylinder 33 to the controller through the impact force data transmitted by the pressure sensing module so as to control the expansion of the cylinder 33.

In the above scheme, as shown in fig. 3, the protection part is arranged in the anti-collision rail formed by concrete, the pressure sensing module is used for sensing and monitoring the collision force, the extending length of the cylinder 33 is transmitted to the controller through the cylinder 33 stretching pre-judging module according to the size of the collision force, so that the secondary protection is performed on the accident collision by utilizing the connection of multiple groups of extending cylinders 33 and the protection rods 34, if the collision force is large, people in the automobile are likely to throw out of the automobile window, therefore, more serious collision is caused to avoid people falling below a highway bridge, secondary interception is performed through the cylinder 33 extending to a certain length, the expansion of the inflatable cushion 35 is controlled through the controller, and the inflatable cushion 35 is ensured to be in a saturated state when the cylinder 33 is used, so as to buffer the force of the people or the automobile collision and reduce the injury.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.