CN112095494A - Construction method for heightening bridge pad stone - Google Patents
Construction method for heightening bridge pad stone Download PDFInfo
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- CN112095494A CN112095494A CN202011063499.2A CN202011063499A CN112095494A CN 112095494 A CN112095494 A CN 112095494A CN 202011063499 A CN202011063499 A CN 202011063499A CN 112095494 A CN112095494 A CN 112095494A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention relates to a construction method for heightening bridge padstones, which comprises the following steps: a temporary cushion block is stuffed between the beam body which is jacked in place and the bent cap; performing chiseling treatment on the position, provided with the pad stone, on the top of the bent cap to expose the coarse aggregate on the top of the bent cap; building a heightening layer template of the cushion stone above the coarse aggregate; and carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked. After the bridge floor lifting, in order to realize the support to the bridge floor of bridge behind the lifting, set up new stone that fills up on the bent cap, can carry out pouring of concrete fast through the hydraulic grouting pump, improved the efficiency of construction of stone that fills up, can carry out pouring of concrete according to the position that the stone that fills up located simultaneously, the peripheral gap of rational utilization stone that fills up carries out, it is narrow and small to have overcome stone operation space, and the stone that fills up pours the problem of difficulty.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a construction method for heightening a bridge pad stone.
Background
With the mass construction of highways in China, more original roads reach or exceed the design service life, and the original roads need to be renovated. The common form of road renovation is mainly to pave an asphalt pavement after the disease treatment is carried out on the original concrete pavement. Therefore, in the road sections with elevated road surface elevations, the upper structures of some built bridges still in service life need to be heightened so as to be smoothly connected with newly-repaired roads. After the bridge floor is raised, the original stone pad height can not support the lifted bridge floor, so a new stone pad needs to be constructed to support the lifted bridge floor. But after the bridge floor jacking, the operating space of stone setting construction is narrow and small, carries out concrete placement from the stone setting top, and the operation is inconvenient, and concrete placement is comparatively difficult in place, if adopt artifical concreting, and the efficiency of construction is lower.
Disclosure of Invention
For overcoming above technical problem, especially after the bridge floor jacking, the operating space of stone setting construction is narrow and small, carries out concrete placement from the stone setting top, and the operation is inconvenient, and concrete placement targets in place comparatively difficult problem, specially proposes following technical scheme:
the construction method for heightening the bridge padstone provided by the embodiment of the application comprises the following steps:
a temporary cushion block is stuffed between the beam body which is jacked in place and the bent cap;
performing chiseling treatment on the position, provided with the pad stone, on the top of the bent cap to expose the coarse aggregate on the top of the bent cap;
building a heightening layer template of the cushion stone above the coarse aggregate;
and carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked.
Optionally, the step of performing concrete pouring on the heightened layer formwork of the cushion stone through a hydraulic grouting pump comprises:
when the position that sets up the bed stone was located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretched into the bridge floor expansion joint that removes the restraint to continue to stretch into the heightened layer template top of bed stone.
Optionally, the step of performing concrete pouring on the coarse aggregate of the heightened formwork of the stone pad through a hydraulic grouting pump comprises:
when the position that sets up the bed stone was located continuous bridge floor below, hydraulic grouting pump grout outlet was followed the increase layer template top side of bed stone stretches into to the bed stone concrete that increases pours.
Optionally, after obtaining the heightened bolster after the beam body is jacked, the method includes:
and when the heightened cushion stone reaches the preset strength, the lifted beam body falls on the heightened cushion stone.
Optionally, when the heightened bolster reaches a preset strength, before the beam body after jacking falls onto the heightened bolster, the method includes:
and installing a rubber support on the heightened cushion stone.
Optionally, the raised pad has a top surface parallel to a horizontal plane.
Optionally, after the temporary cushion block is inserted between the beam body lifted in place and the cover beam, the method includes:
and determining the arrangement position of the heightened cushion stone at the top of the cover beam.
Optionally, before the temporary cushion block is inserted between the beam body lifted in place and the cover beam, the method further includes:
dismantling the old bent cap at the transition pier and arranging a temporary support for supporting the upper beam body of the transition pier;
determining the size and the position of a new heightened capping beam arranged at the transition pier, and determining the arrangement position of the new cushion stone on the new capping beam;
building a new cover beam template at the new cover beam position, and embedding a connecting structure for connecting the new base stone template and the new cover beam at the setting position of the new base stone;
and carrying out concrete pouring on the new bent cap template to obtain the heightened new bent cap.
Optionally, after the concrete pouring is performed on the new capping beam formwork to obtain the heightened new capping beam, the method includes:
building a new stone pad template on the new bent cap, and connecting the new stone pad template with the connecting structure;
and carrying out concrete pouring on the new stone pad template through a hydraulic grouting pump to obtain the new stone pad after the beam body at the transition pier is jacked.
Optionally, the concrete pouring of the new stone liner template by the hydraulic grouting pump includes:
when the new rubble is arranged at the transition pier and below the bridge deck expansion joint, the slurry outlet of the hydraulic grouting pump extends into the bridge deck expansion joint for removing the constraint and continues to extend into the top of the new rubble template.
Optionally, the concrete pouring of the new stone liner template by the hydraulic grouting pump includes:
and when the new rubble is arranged at the transition pier and below the continuous bridge deck, the slurry outlet of the hydraulic grouting pump extends into the side surface of the top of the new rubble template so as to pour the new rubble concrete.
Compared with the prior art, the invention has the following beneficial effects:
the construction method for heightening the bridge padstone provided by the embodiment of the application comprises the following steps: a temporary cushion block is stuffed between the beam body which is jacked in place and the bent cap; performing chiseling treatment on the position, provided with the pad stone, on the top of the bent cap to expose the coarse aggregate on the top of the bent cap; building a heightening layer template of the cushion stone above the coarse aggregate; and carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked. After the bridge floor lifting, in order to realize the support to the bridge floor of bridge behind the lifting, set up new stone that fills up on the bent cap, can carry out pouring of concrete fast through hydraulic grouting pump, the efficiency of construction of stone that fills up has been improved, hydraulic grouting pump slip casting mouth is less simultaneously, can be according to the position that the stone that fills up located, the pouring of concrete is carried out in the peripheral gap of rational utilization stone that fills up, and then it is narrow and small to have avoided stone operation space, and the problem of difficulty is pour to the stone that fills up.
The construction method that bridge bed stone was increased that this application embodiment provided, it is right through hydraulic grouting pump the layer template that adds of bed stone carries out concrete placement, include: when the position that sets up the bed stone was located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretched into the bridge floor expansion joint that removes the restraint to continue to stretch into the heightened layer template top of bed stone. In the embodiment that this application provided, the rational utilization bridge floor expansion joint, under the prerequisite that does not cause the damage to the bridge floor, realized pouring to the stone of adding, it is narrow and small to have overcome stone operation space, and the stone pours the problem of difficulty.
The construction method that bridge bed stone was increased that this application embodiment provided, it is right through hydraulic grouting pump the layer template that adds of bed stone carries out concrete placement, include: when the position that sets up the bed stone was located continuous bridge floor below, hydraulic grouting pump grout outlet was followed the increase layer template top side of bed stone stretches into to the bed stone concrete that increases pours. In the embodiment that this application provided, when the bridge floor is continuous, under the prerequisite that does not cause the damage to the bridge floor, adopt hydraulic grouting pump edgewise to carry out the pouring of stone pad, realized pouring to the stone pad of heightening, broken the narrow and small restriction in stone pad operating space.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of a construction method for heightening a bridge pad according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, and/or operations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, and/or groups thereof.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The construction method for heightening the bridge padstone provided by the embodiment of the application is shown in fig. 1 and comprises the following steps: s10, S20, S30, S40.
S10: and a temporary cushion block is stuffed between the beam body which is jacked in place and the cover beam.
In an embodiment provided by the application, the pad obtained by the construction method for heightening the bridge pad is mainly used for supporting the lifted bridge deck. After the bridge floor is raised, because the bridge floor after jacking can not be supported to original stone pad height, consequently through the bridge floor after the bridge floor is supported the jacking through the new stone pad of construction in bridge floor lower bent top to ensure that the bridge floor after the jacking has sufficient bearing structure, guarantee the line type of bridge floor after the jacking.
Therefore, in the embodiment that this application provided, when the roof beam body jacking to predetermineeing the height, in order to be able to be under construction the stone pad between the roof beam body and bent cap, before guaranteeing that the stone pad is accomplished, the roof beam body has other structural support to guarantee the line type of bridge, fills in interim cushion between the roof beam body and bent cap for before the roof beam body falls the roof beam to the stone pad, the roof beam body can steadily support reliably on the bent cap. Correspondingly, in order to ensure the construction space, the preset height of the beam body which is jacked up is higher than the height of the beam body which falls on the cushion stone after new construction, so that the space between the beam body and the cover beam is ensured for carrying out the construction of the cushion stone, and meanwhile, the height of the new cushion stone after the new construction and the heightening can also be ensured to meet the requirement.
S20: and performing chiseling treatment on the position of the top of the bent cap provided with the cushion stone to expose the coarse aggregate on the top of the bent cap.
Optionally, after inserting the temporary cushion block between the roof beam body that the jacking put in place and the bent cap, include:
the position for arranging the heightened cushion stone is determined on the top of the cover beam.
In an embodiment that this application provided, for the normal operation in-process of the roof beam body, the stone pad can the load that the roof beam body received, and the position that the new stone pad set up simultaneously still can not lead to bent cap or roof beam body to appear the phenomenon of harm because of the atress is uneven. After the temporary cushion block is stuffed between the cover beam and the beam body, the setting position of the heightened new cushion stone is determined at the top of the cover beam. The setting position of the heightened new cushion stone is determined according to the width of the bridge after jacking, the height of the bridge and the load of the bridge in normal operation.
In an embodiment that the application provided, in order to make between stone pad and the bent cap more closely be connected, guarantee that new stone pad can not appear the displacement on the bent cap after the carrier bar body, the position of setting up the stone pad to the bent cap top carries out the chisel hair and handles to expose the coarse aggregate at bent cap top. In an embodiment that this application provided, the roof beam body jacking is to predetermineeing after the height, takes off the old rubber support of old stone pad, and rubbish is gone up to the clearance bent cap top, and machinery and artifical cooperate and carry out the chisel hair processing to the position that the bent cap top set up new stone pad, until exposing the thick aggregate at bent cap top, the size that the thick aggregate exposes is convenient for carry out the setting of building of heightening layer template of new stone pad.
S30: and building a heightened layer template of the cushion stone above the coarse aggregate.
S40: and (4) carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked.
In order to ensure that the heightened cushion stone and the capping beam which are newly arranged are more closely connected, the new cushion stone is ensured not to be displaced on the capping beam after the new cushion stone bears the beam body. After the capping beam is chiseled and the coarse aggregate is exposed, the heightened formwork of the heightened new pad stone is connected with the coarse aggregate. The heightened template of the new stone pad is connected with the coarse aggregate of the bent cap at the top of the bent cap, namely the construction of the heightened template of the new stone pad is completed, therefore, the concrete is poured into the heightened template through a hydraulic grouting pump, and when the concrete reaches the preset strength, the heightened stone pad used for supporting the beam body after the beam body is jacked is obtained. In the embodiment that this application provided, because the clear distance between bent cap top and the roof beam body is 20cm for the new stone pad construction space of heightening is comparatively narrow and small, and large-scale apparatus is not convenient for be under construction, and artifical efficiency of construction is lower. However, the whole machine type of the hydraulic grouting pump is small, operation construction is facilitated on the bridge floor, a grout outlet of the hydraulic grouting pump is small, construction is facilitated for a narrow space, grouting efficiency of the hydraulic grouting pump is higher than that of manual work, and therefore construction efficiency of a new stone pad is improved.
Optionally, the step of concreting the heightened formwork of the bed stone by a hydraulic grouting pump comprises:
when the position that sets up the bed stone was located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretched into the bridge floor expansion joint that removes the restraint to continue to stretch into the heightened layer template top of bed stone.
In the embodiment provided by the application, in one implementation mode, the net distance between the cover beam and the beam body after jacking is 20cm, so that the construction space of the new cushion stone is narrow. In order to facilitate pouring of the new rubble in the narrow space, when the position for arranging the rubble is located below the bridge deck expansion joint, because the grout outlet of the hydraulic grouting pump is small, the grout outlet of the hydraulic grouting pump can stretch into the bridge deck expansion joint for removing the constraint, concrete is poured into the heightened layer formwork of the new rubble in the expansion joint, further, the grout outlet of the hydraulic grouting pump can be continuously stretched into the top of the heightened layer formwork of the new rubble, so that concrete can be directly poured into the heightened layer formwork, construction of the rubble in the narrow space is achieved, the grout outlet of the hydraulic grouting pump can be continuously stretched into the top of the heightened layer formwork of the new rubble for pouring the rubble, and the phenomenon that the concrete overflows from the expansion joint when pouring is avoided.
Optionally, the concrete pouring is performed on the heightened layer formwork of the cushion stone through a hydraulic grouting pump, and the concrete pouring method comprises the following steps:
when the position that sets up the bed stone was located continuous bridge floor below, hydraulic grouting pump grout outlet was followed the increase layer template top side of bed stone stretches into to the bed stone concrete that increases pours.
When the position that sets up the stone pad is located continuous bridge floor below, and the clear distance is 20cm between the roof beam and the roof beam body after the jacking, and then large machine can not carry out concrete placement to the heightened layer template of the new stone pad in continuous bridge floor below, also be convenient for simultaneously transfer from the bridge and carry out concrete placement. In order to ensure the construction of the new cushion stone, in another embodiment, a slurry outlet of a hydraulic grouting pump extends into the top of the heightened formwork from a gap between the side beam body and the cover beam, so that the slurry outlet of the hydraulic grouting pump is positioned on the side surface of the top of the heightened formwork, and then the hydraulic grouting pump injects concrete into the heightened formwork to realize the pouring of the new cushion stone. The construction of narrow and small space to the new stone pad of heightening has been overcome equally, has overcome the position that the stone pad set up simultaneously and has been located continuous bridge floor and transfer, and the bridge floor does not have the stone pad and pours the problem of position.
Optionally, after obtaining the heightened bolster after the beam body is jacked, the method includes: and when the heightened cushion stone reaches the preset strength, the lifted beam body falls onto the heightened cushion stone so as to complete the integral lifting of the old beam body. Optionally, when the bolster of heightening reaches preset intensity, before the roof beam body after will jacking falls the roof beam to the bolster of heightening, include: the rubber support is arranged on the heightened pad stone, so that the heightened pad stone can be in soft contact with the beam body, and the surface of the beam body structure is prevented from being damaged. Optionally, the top surface of the heightened cushion stone is parallel to the horizontal plane, so that the slope and the line type of the beam body after falling down are guaranteed.
In the embodiment that this application provided, pour at new base stone and accomplish, and when the concrete strength of the new base stone of heightening reached preset intensity, then at the new base stone top installation rubber support of heightening, the roof beam body after will jacking falls the roof beam and is installed on the new base stone of rubber support of heightening. In addition, in order to ensure the linear shape of the beam body after falling on the cushion stone, in the embodiment provided by the application, the top surface of the heightened cushion stone is parallel to the horizontal plane. In the embodiments provided in the present application, the concrete for pouring the cushion stone uses an early strength concrete material, so as to reduce the maintenance time of the cushion stone and shorten the construction period of the cushion stone. Optionally, before the temporary cushion block is inserted between the beam body lifted in place and the cover beam, the method further includes:
dismantling the old bent cap at the transition pier and arranging a temporary support for supporting the upper beam body of the transition pier;
determining the size and the position of a new heightened capping beam arranged at the transition pier, and determining the arrangement position of a new cushion stone on the new capping beam;
building a new cover beam template at the position of the new cover beam, and embedding a connecting structure for connecting the new base stone template and the new cover beam at the setting position of the new base stone;
and performing concrete pouring on the new capping beam template to obtain the heightened new capping beam.
In an embodiment that this application provided, after the roof beam body jacking, the difference between former bent cap of transition mound department and the roof beam body is great, directly increases the stone pad and can not realize the completion support to the roof beam body, and the stability of stone pad also can not be guaranteed simultaneously, and because in the embodiment that this application provided, the old bridge also has the bridge construction of widen part. Therefore, in order to ensure the line type of the bridge after jacking, in the embodiment provided by the application, the bent cap structure of the original bridge is firstly dismantled, the position and the size of the new bent cap constructed in the transition are determined, then the new bent cap template is constructed according to the position and the size of the new bent cap, and concrete is poured on the new bent cap template, so that the new bent cap can be obtained. Wherein new bent cap has reduced with the jacking difference between the back roof beam body that targets in place, can also support old bridge and the bridge construction of old bridge widened portion simultaneously, and then guarantees the support of bent cap to the roof beam body structure, reduces the stability of new stone backing on the new bent cap simultaneously.
In the embodiment that this application provided, in order to guarantee that new stone pad and new bent cap can be connected firmly, rationally set up the position and the quantity of new stone pad simultaneously, confirm the position and the size in-process of new bent cap, confirm simultaneously that new stone pad sets up the position, before new bent cap pours, the in-process is built to new bent cap template or build after accomplishing, pre-buried connection structure in new bent cap template, this connection structure is used for being connected with new stone pad template structure.
Optionally, after concrete pouring is performed on the new capping beam formwork to obtain a heightened new capping beam, the method includes:
building a new stone-padding template on the new bent cap, and connecting the new stone-padding template with the connecting structure;
and (5) performing concrete pouring on the new stone-padding template through a hydraulic grouting pump to obtain the new stone-padding after the beam body at the transition pier is jacked.
Optionally, the concrete pouring of the new stone-laying formwork by the hydraulic grouting pump comprises:
when the position of the transition pier, which is provided with the new rubble, is located below the bridge deck expansion joint, the slurry outlet of the hydraulic grouting pump extends into the bridge deck expansion joint for removing the constraint and continues to extend into the top of the new rubble template.
Optionally, the concrete pouring of the new stone-laying formwork by the hydraulic grouting pump comprises:
when the position of the transition pier for setting the new pad stone is positioned below the continuous bridge deck, a slurry outlet of a hydraulic grouting pump extends into the side face of the top of the new pad stone template so as to pour the new pad stone concrete.
In the embodiment that this application provided, after the concrete placement was accomplished to the new bent cap of adding, and after the concrete reached preset intensity, built new stone backing template on new bent cap, wherein, pre-buried connection structure is connected on new stone backing template and the new bent cap to guarantee the roof beam body after the roof beam falls to the stone backing, can not appear removing, guaranteed the stability of stone backing and roof beam body. And after the new stone-padding template is built, performing concrete pouring on the new stone-padding template through a hydraulic grouting pump to obtain a new stone-padding on the new cover beam, namely the stone-padding after the transition pier goes out of the beam body and is jacked. In the embodiment provided by the application, since the capping beam at the transition pier is already heightened, the cushion stone on the new capping beam at the transition pier does not need to be heightened.
However, in the embodiments provided in the present application, although the stones on the new capping beam are not heightened, after the new capping beam is heightened, the distance between the new capping beam and the beam body is reduced, so that it is inconvenient to construct the new stones between the new capping beam and the beam body. Consequently, when the bridge floor is discontinuous bridge face on the transition mound, when having the bridge floor expansion joint on the transition mound promptly, at this moment, the position that sets up of transition mound department new stone pad is located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretches into the bridge floor expansion joint of removing the restraint, and continue to stretch into new stone pad template top, carry out pouring of new stone pad concrete from new stone pad template top, so that the concrete can directly pour in the new stone pad template, the construction to the stone pad in narrow and small space has been realized, continue to stretch into the stone pad top of waiting to pour with hydraulic grouting pump grout outlet and carry out the stone pad and pour the construction, avoid the concrete expansion joint when pouring, spill over in the expansion joint.
Similarly, if be when continuous bridge face on the transition mound, when the new stone that fills up of transition mound department set up the position and is located continuous bridge floor below, be not convenient for carry out the pouring of new stone pad equally, at this moment, hydraulic grouting pump grout outlet stretches into from new stone pad template top side to carry out new stone pad concrete placement, overcome narrow and small space and to the construction of the new stone pad of heightening equally, overcome the position that the stone that fills up set up simultaneously and be located continuous bridge floor and transfer, the bridge floor does not have the problem that the stone pad pour the position.
It should be noted that, in the embodiments provided in the present application, the stone-setting high-rise formwork and the new stone-setting formwork may be a steel bar formwork. The new capping beam may also be the old capping beam and a raised and/or widened portion of the old capping beam. Wherein, the heightened and/or widened part of the bent cap is a bent cap structure which is newly poured on the old bent cap.
In summary, the construction method for heightening the bridge padstone provided by the application has the following beneficial effects:
the construction method for heightening the bridge padstone provided by the embodiment of the application comprises the following steps: a temporary cushion block is stuffed between the beam body which is jacked in place and the bent cap; performing chiseling treatment on the position, provided with the pad stone, on the top of the bent cap to expose the coarse aggregate on the top of the bent cap; building a heightening layer template of the cushion stone above the coarse aggregate; and carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked. After the bridge floor lifting, in order to realize the support to the bridge floor of bridge behind the lifting, set up new stone that fills up on the bent cap, can carry out pouring of concrete fast through hydraulic grouting pump, the efficiency of construction of stone that fills up has been improved, hydraulic grouting pump slip casting mouth is less simultaneously, can be according to the position that the stone that fills up located, the pouring of concrete is carried out in the peripheral gap of rational utilization stone that fills up, and then it is narrow and small to have avoided stone operation space, and the problem of difficulty is pour to the stone that fills up.
The construction method that bridge bed stone was increased that this application embodiment provided, it is right through hydraulic grouting pump the layer template that adds of bed stone carries out concrete placement, include: when the position that sets up the bed stone was located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretched into the bridge floor expansion joint that removes the restraint to continue to stretch into the heightened layer template top of bed stone. In the embodiment that this application provided, the rational utilization bridge floor expansion joint, under the prerequisite that does not cause the damage to the bridge floor, realized pouring to the stone of adding, it is narrow and small to have overcome stone operation space, and the stone pours the problem of difficulty.
The construction method that bridge bed stone was increased that this application embodiment provided, it is right through hydraulic grouting pump the layer template that adds of bed stone carries out concrete placement, include: when the position that sets up the bed stone was located continuous bridge floor below, hydraulic grouting pump grout outlet was followed the increase layer template top side of bed stone stretches into to the bed stone concrete that increases pours. In the embodiment that this application provided, when the bridge floor is continuous, under the prerequisite that does not cause the damage to the bridge floor, adopt hydraulic grouting pump edgewise to carry out the pouring of stone pad, realized pouring to the stone pad of heightening, broken the narrow and small restriction in stone pad operating space.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A construction method for heightening bridge padstones is characterized by comprising the following steps:
a temporary cushion block is stuffed between the beam body which is jacked in place and the bent cap;
performing chiseling treatment on the position, provided with the pad stone, on the top of the bent cap to expose the coarse aggregate on the top of the bent cap;
building a heightening layer template of the cushion stone above the coarse aggregate;
and carrying out concrete pouring on the heightened layer template of the cushion stone through a hydraulic grouting pump to obtain the heightened cushion stone after the beam body is jacked.
2. The construction method for heightening the bridge padstone according to claim 1, wherein the concrete pouring of the heightened layer formwork of the padstone through a hydraulic grouting pump comprises:
when the position that sets up the bed stone was located bridge floor expansion joint below, hydraulic grouting pump grout outlet stretched into the bridge floor expansion joint that removes the restraint to continue to stretch into the heightened layer template top of bed stone.
3. The construction method for heightening the bridge padstone according to claim 1, wherein the concrete pouring of the heightened layer formwork of the padstone through a hydraulic grouting pump comprises:
when the position that sets up the bed stone was located continuous bridge floor below, hydraulic grouting pump grout outlet was followed the increase layer template top side of bed stone stretches into to the bed stone concrete that increases pours.
4. The construction method for heightening the bridge padstone according to claim 1, wherein after the step of obtaining the heightened padstone after the beam body is jacked, the method comprises the following steps:
and when the heightened cushion stone reaches the preset strength, the lifted beam body falls on the heightened cushion stone.
5. The construction method for heightening a bridge bolster according to claim 4, wherein before dropping the lifted beam body onto the heightened bolster when the heightened bolster reaches a preset strength, the method comprises:
and installing a rubber support on the heightened cushion stone.
6. The method as claimed in claim 1, wherein the raised stone is parallel to the horizontal plane.
7. The construction method for heightening the bridge padstone according to claim 1, wherein after the temporary cushion block is stuffed between the beam body jacked in place and the capping beam, the construction method comprises the following steps:
and determining the arrangement position of the heightened cushion stone at the top of the cover beam.
8. The construction method for heightening a bridge bolster according to claim 1, further comprising, before inserting the temporary spacer between the beam body lifted in place and the cap beam:
dismantling the old bent cap at the transition pier and arranging a temporary support for supporting the upper beam body of the transition pier;
determining the size and the position of a new heightened capping beam arranged at the transition pier, and determining the arrangement position of the new cushion stone on the new capping beam;
building a new cover beam template at the new cover beam position, and embedding a connecting structure for connecting the new base stone template and the new cover beam at the setting position of the new base stone;
and carrying out concrete pouring on the new bent cap template to obtain the heightened new bent cap.
9. The construction method for heightening a bridge bolster according to claim 8, wherein after the concrete pouring of the new capping beam formwork to obtain the heightened new capping beam, the method comprises:
building a new stone pad template on the new bent cap, and connecting the new stone pad template with the connecting structure;
and carrying out concrete pouring on the new stone pad template through a hydraulic grouting pump to obtain the new stone pad after the beam body at the transition pier is jacked.
10. The construction method for heightening the bridge pad according to claim 8, wherein the concrete pouring of the new pad template by the hydraulic grouting pump comprises:
when the new rubble is arranged at the transition pier and below the bridge deck expansion joint, the slurry outlet of the hydraulic grouting pump extends into the bridge deck expansion joint for removing the constraint and continues to extend into the top of the new rubble template.
11. The construction method for heightening the bridge pad according to claim 8, wherein the concrete pouring of the new pad template by the hydraulic grouting pump comprises:
and when the new rubble is arranged at the transition pier and below the continuous bridge deck, the slurry outlet of the hydraulic grouting pump extends into the side surface of the top of the new rubble template so as to pour the new rubble concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011063499.2A CN112095494A (en) | 2020-09-30 | 2020-09-30 | Construction method for heightening bridge pad stone |
Applications Claiming Priority (1)
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Application publication date: 20201218 |