CN104195959B - A kind of prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique - Google Patents

Abstract

The invention discloses a kind of prefabricated Wavelike steel webplate PC i beam and turn combination box bridge construction technique, combination box beam bridge of constructing combined box beam in each combined box beam sections be formed by connecting by two panels Wavelike steel webplate PC i beam, this technique comprises step: one, Wavelike steel webplate PC i beam is prefabricated: precast pedestal is constructed, soffit formwork is installed, in base plate, cage of reinforcement is installed, base plate inner corrugated pipe is installed, locating support is installed and side template Zhi Li, Wavelike steel webplate is installed, underplate concrete is built, roof formed model sheetinstallat, in top board, cage of reinforcement is installed, concrete roof is built and cable stretching in bottom-plate body, two, the displacement of Wavelike steel webplate PC i beam and erection, three, longitudinal wet joint construction, four, external tendon stretch-draw and system transform.Present invention process step simple, reasonable in design and realize convenient, the construction period is short, construction quality is high, adopt precast pedestal to have matched with locating support prefabrication of beam, can effectively ensure combination box Beam Bridge Construction Quality.

Description

A kind of prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique

Technical field

The invention belongs to technical field of bridge construction, be specifically related to a kind of prefabricated Wavelike steel webplate PC i beam and turn combination box bridge construction technique.

Background technology

For the needs of adapt to economic development construction and social development, the development of modern concrete bridge proposes " lightweight, high-strength, long span " target, box beam has larger bending resistance with it and torsional rigidity can meet the requirement of work progress to stability, the formation analyzing case beam is known: case back, the thickness of base plate requires to decide according to the bending resistance in cross section, be subject to the restriction of the stressed of structure and workability, by reducing top, the thickness of base plate reaches minimizing weight, the potentiality reducing cost are very limited, and amass for accounting for box section the web reaching 25% ~ 30%, its deadweight is reduced by reducing its thickness, improve box-beam structure performance space larger.

Wavelike steel webplate prestressed concrete box-beam bridge is a kind of novel bridge form of structure occurred the eighties in 20th century.The design of steel-concrete combined structure bridge and to be built in domestic starting more late, especially Case comparison is few at home for Wavelike steel webplate prestressed concrete combined box beam bridge, and the specific characteristic of what it had be different from ordinary concrete case beam is mainly manifested in three aspects such as the shear connector adopting Wavelike steel webplate, external pre-stress bundle, Wavelike steel webplate and upper and lower concrete flange plate.

Wavelike steel webplate prestressed concrete compound beam is a kind of novel steel-concrete combined structure, and its main feature replaces concrete web with Wavelike steel webplate in conventional concrete case beam or i beam, significantly alleviates the deadweight of beam body.Wavelike steel webplate prestressed concrete compound beam takes full advantage of concrete anti-compression, advantage that Wavelike steel webplate shearing resistance yield strength is high, effectively Steel concrete bi-material is combined, improve the service efficiency of material, is a kind of economic, reasonable, efficient form of structure.Wavelike steel webplate prestressed concrete compound beam mainly contains cast-in-place and prefabricate and install two kinds of construction methods, and main employing is cast-in-situ construction method at present.When adopting the construction of prefabricated construction method, at the prefabricated Wavelike steel webplate of precast yard's standardization, and complete the prefabrication process of Wavelike steel webplate prestressed concrete compound beam at precasting yard, thus the construction quality of beam body can be ensured preferably.But the prefabricating technique of Wavelike steel webplate prestressed concrete compound beam is ripe not enough at present, such as in Wavelike steel webplate prestressed concrete i beam (i.e. Wavelike steel webplate PC i beam) prefabrication process, because beam body width is little, web quantity is many, especially along with precast beam is across the continuous increase in footpath, prefabricated construction difficulty is very large, and prefabricated profiled beam weight not easily ensures.In addition, when adopting the construction of prefabricated construction method, also there is complicated construction technique, construction period long, manpower and material resources input cost is higher, construction quality is difficult to the problems such as guarantee.Thus, nowadays a kind of processing step is lacked simple, reasonable in design and realize the prefabricated Wavelike steel webplate PC i beam convenient, the construction period is short, construction quality is high and turn combination box bridge construction technique, adopt precast pedestal to have matched with locating support prefabrication of beam, and effectively can ensure the construction quality of constructed combination box beam bridge.

Summary of the invention

Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of prefabricated Wavelike steel webplate PC i beam is provided to turn combination box bridge construction technique, its processing step is simple, reasonable in design and realization is convenient, the construction period is short, construction quality is high, adopt precast pedestal to have matched with locating support prefabrication of beam, and effectively can ensure the construction quality of constructed combination box beam bridge.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, combination box beam bridge of constructing comprise the combined box beam being erected at bridge lower support body and fastening, described combined box beam is divided into multiple combined box beam sections along vertical bridge to direction, each described combined box beam sections is formed by connecting by the Wavelike steel webplate PC i beam of the symmetrical laying of two panels, it is characterized in that this technique comprises the following steps:

Step one, Wavelike steel webplate PC i beam are prefabricated: to construction described combined box beam need Wavelike steel webplate PC i beam carry out prefabricated, process is as follows:

Step 101, precast pedestal are constructed: first at precasting yard ground one deck concrete cushion that tiles, and the precast pedestal of concrete pedestal as Wavelike steel webplate PC i beam of constructing on concrete cushion;

The length of described concrete pedestal is not less than the longitudinal length of Wavelike steel webplate PC i beam, described Wavelike steel webplate PC i beam is made up of concrete floor, concrete roof above concrete floor and the Wavelike steel webplate be connected between concrete floor and concrete roof, the width of described concrete pedestal is not less than the width of concrete floor, roof steel bar skeleton is provided with in described concrete roof, be provided with rope in baseplate reinforcing bar skeleton and body in described concrete floor, in described body, rope is the presstressed reinforcing steel laid along the length direction of concrete floor; Build shaping baseplate molding model sheetinstallat on concrete pedestal to concrete floor, described baseplate molding template comprises the soffit formwork be laid on concrete pedestal and the side template be arranged on bed die steel plate, and described soffit formwork is steel plate; Reinforced mesh is configured with in described concrete pedestal;

Step 102, soffit formwork are installed: be arranged on by soffit formwork on concrete pedestal, and by multiple expansion bolt, soffit formwork is fixed on concrete pedestal, multiple described expansion bolt is all fixed on concrete pedestal and its top is all fixed on soffit formwork with welding manner, is covered with layer of fine sand between described soffit formwork and concrete pedestal;

In step 103, base plate, cage of reinforcement is installed: on the soffit formwork of installation in a step 102, install described baseplate reinforcing bar skeleton;

Step 104, base plate inner corrugated pipe are installed: in the described baseplate reinforcing bar skeleton of installation in step 103, the bellows that prestressed duct is continued to employ in advance; Described prestressed pore passage is the duct penetrated for rope in described body;

Step 105, locating support are installed and side template Zhi Li: the left and right sides of described concrete pedestal sets up a locating support respectively in a step 101, and prop up vertical side template on soffit formwork;

The height of described locating support is lower than the bottom level of concrete roof, described locating support comprises by the assembled bracing frame of many rod members and multiple backstay positioned Wavelike steel webplate, multiple described backstay is laid from front to back along the length direction of concrete pedestal, and multiple described backstay is installed on support frame as described above and it is all positioned at inside support frame as described above;

Step 106, Wavelike steel webplate are installed: be installed on by the Wavelike steel webplate machined in advance above the skeleton of baseplate reinforcing bar described in step 103, and positioned Wavelike steel webplate by the backstay that two described locating supports are installed;

Step 107, underplate concrete are built: carry out concrete pouring construction to concrete floor;

Step 108, roof formed model sheetinstallat: on two described locating supports of installation in step 105, install the roof formed template for building formation of concrete top board;

In step 109, top board, cage of reinforcement is installed: in the roof formed template of installation in step 108, install described roof steel bar skeleton;

Step 110, concrete roof are built: carry out concrete pouring construction to concrete roof;

Cable stretching in step 111, bottom-plate body: after institute's concreting reaches design strength in step 107, penetrates rope in described body and carries out stretch-draw in described prestressed pore passage, and stretch-draw carries out prestress hole path pressure grouting and sealing off and covering anchorage process after completing;

The displacement of step 2, Wavelike steel webplate PC i beam and erection: Wavelike steel webplate PC i beam prefabricated in step one is moved to erection construction place from prefabricated place, and Wavelike steel webplate PC i beam is erected at the described bridge lower support body of having constructed in advance and fastens;

Step 3, longitudinal wet joint are constructed: carry out longitudinal wet joint construction respectively to each combined box beam sections of constructed combined box beam, and obtain multiple combined box beam sections of having constructed;

When longitudinal wet joint construction is carried out to each combined box beam sections, the longitudinal wet joint between the concrete floor of the two panels Wavelike steel webplate PC i beam of this combined box beam sections of composition and between concrete roof is constructed respectively;

Step 4, external tendon stretch-draw and system transform: lay multiple tracks external tendon respectively in each combined box beam sections of having constructed in step 3, and stretch-draw is carried out to external tendon described in multiple tracks; After stretch-draw completes, complete system transform, obtain the combination box beam bridge of having constructed.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: in step 2, Wavelike steel webplate PC i beam is erected at before the described bridge lower support body of having constructed in advance fastens, first fasten laying temporary support in described bridge lower support body, then the Wavelike steel webplate PC i beam of the multiple described combined box beam sections of composition is all erected on described temporary support forms simply-supported state; When carrying out external tendon stretch-draw and system transform in step 4, after in longitudinal wet joint work progress in step 3, the intensity of institute's concreting reaches more than 90% of design strength, stretch-draw is carried out to external tendon described in multiple tracks, and after stretch-draw completes, respectively anchoring is carried out to external tendon described in multiple tracks; Subsequently, described combined box beam is dropped on described bridge lower support body and fasten on set permanent bearing, and remove described bridge lower support body and fasten laid temporary support, obtain the combined box beam of having constructed.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: the inner side of the PC of Wavelike steel webplate described in step 101 i beam is also provided with crossbeam and diaphragm, described crossbeam and described diaphragm are reinforced concrete structure and cage of reinforcement set by the two inside is all fastenedly connected with set described roof steel bar skeleton in Wavelike steel webplate PC i beam or described baseplate reinforcing bar skeleton and is integrated; Be connected with described diaphragm by described crossbeam between two in each described combined box beam sections described Wavelike steel webplate PC i beams, the quantity of described crossbeam is multiple and the crossbeam be connected between two described Wavelike steel webplate PC i beam ends is end floor beam, and the quantity of described diaphragm is one or more and it is between two described end floor beams; When constructing to the longitudinal wet joint between the concrete floor of two panels Wavelike steel webplate PC i beam and between concrete roof in step 3, the wet seam between the crossbeam to two panels Wavelike steel webplate PC i beam and between the diaphragm of two panels Wavelike steel webplate PC i beam is also needed to construct.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: described diaphragm be between two described end floor beams middle part in diaphragm, described middle diaphragm is provided with the transfer turned to described external tendon, and the external tendon being positioned at described combined box beam sections is in the shape of the letter V or inverted v-shaped and it is along vertical bridge to laying; When laying external tendon in step 4 in each combined box beam sections, the two ends of described external tendon are anchored at respectively on two described end floor beams; External tendon in multiple described combined box beam sections is fold-line-shaped; When carrying out system transform in step 4, to carrying out the wet seam construction of transverse direction between adjacent two described combined box beam sections, make to be connected as one by longeron between adjacent two described combined box beam sections, described longeron is reinforced concrete structure, and cage of reinforcement set in described longeron and the interior set cage of reinforcement of described crossbeam, described roof steel bar skeleton, described baseplate reinforcing bar skeleton are fastenedly connected and are integrated.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: when carrying out the installation of base plate inner corrugated pipe in step 104, multiple bellows positioning device need be adopted, position installed bellows, multiple described bellows positioning device is laid from front to back along the length direction of institute's spacer dimple pipe; Described bellows positioning device is the groined type locating rack be welded by four indented barss, and described groined type locating rack is sleeved on outside located bellows and it is weldingly fixed on described baseplate reinforcing bar skeleton.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: be connected by top link between Wavelike steel webplate with concrete roof described in step 101, described top link is open pore steel plate connector and it is welded on Wavelike steel webplate top; Described open pore steel plate connector has multiple first through hole along its length from front to back.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: the inner side of locating support described in step 105 is provided with multiple steel web position governor motion adjusted the position of Wavelike steel webplate, and multiple described steel web position governor motion is laid from front to back along the length direction of concrete pedestal;

Described steel web position governor motion comprises the adjusting rod being arranged on supporting plate on support frame as described above and being positioned on supporting plate, and one end of described adjusting rod stretches in the first through hole that open pore steel plate connector is opened and its other end is positioned on supporting plate.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: Wavelike steel webplate described in step 101 is spliced by multiple steel web sections, multiple described steel web sections is laid from front to back along the length direction of concrete pedestal, is all connected by multiple high-strength bolt between adjacent two the described steel web sections in front and back;

Described steel web sections is formed in factory's rolling in advance, and when carrying out Wavelike steel webplate installation in step 106, the length direction along concrete pedestal is installed each steel web sections from front to back; Wherein, when any one steel web sections is installed, first by above current installed steel web segment lifting to described baseplate reinforcing bar skeleton, and adopt described steel web position governor motion to adjust the position lifting the steel web sections put in place, and after adjusting to the right place, by backstay, current installed steel web sections is positioned, and the steel web sections of the installation be adjacent by current installed steel web sections is fastenedly connected.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: roof formed template described in side template described in step 101 and step 108 is all for by the assembled template of polylith bamboo slab rubber;

The surrounding arranged outside of the pedestal of concrete described in step 101 has multiplely carries out spacing locating part to side template, and described locating part is fixed on concrete cushion; Carry out propping up immediately to side template in step 105, between side template and locating part, pad dress backing plate, positions side template;

The length of locating support described in step 105 is identical with the length of concrete pedestal;

Before described roof formed template being installed in step 108, first two described locating supports in step 105 are all provided with the temporary supporting system supported described roof formed template, and described temporary supporting system is assembled by the lumps of wood that many are laid on support frame as described above.

Above-mentioned one prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, it is characterized in that: in step 101 before precasting yard Horizon spreads concrete bed course, first backfills one deck backfill layer in prefabricated place, and carries out smooth to described backfill layer; Afterwards, the backfill layer after smooth tiles concrete cushion; Described backfill layer is gravel backfill layer or rock ballast backfill layer; Described Wavelike steel webplate is connected by bottom linker with between concrete floor, and described bottom linker is weldingly fixed on bottom Wavelike steel webplate and it is the shear connector of building in concrete floor; Before step 106 carries out Wavelike steel webplate installation, need in the surfaces externally and internally of the Wavelike steel webplate machined in advance evenly brushing one deck corrosion resistant coating coating, the degree of depth of described corrosion resistant coating coating Transducers Embedded in Concrete base plate and concrete roof is not less than 2cm; Shutoff is all carried out by sealing material in described Wavelike steel webplate and the junction between concrete floor and concrete roof; The junction of described concrete floor top and Wavelike steel webplate is set to drainage slope.

The present invention compared with prior art has the following advantages:

1, the precast pedestal structure adopted is simple, easy construction and input cost is lower.

2, the precast pedestal structure adopted adds up to rationally and result of use is good, by arranging angle bar in pedestal both sides and lay expansion bolt in the middle part of pedestal, the installation quality of soffit formwork in baseplate molding template is effectively ensured, and soffit formwork is fixed, displacement and distortion can not be produced in prefabrication of beam process, thus adopted precast pedestal can provide steady, a reliable platform for the prefabrication process of Wavelike steel webplate prestressed concrete i beam, effectively can improve prefabricated profiled beam weight.

3, the side template of baseplate molding template and roof formed formwork support arrangement is convenient, accurate positioning, and dismounting is easy, thus effectively can ensure the construction quality of concrete floor and concrete roof.

4, the locating support adopted is set up conveniently, input cost is lower and result of use is good, practical value is high, locating support is provided with steel web position reference frame, multiple backstay and multiple steel web position governor motion, by steel web position reference frame to the lateral attitude of Wavelike steel webplate with highly accurately control, simultaneously using the backstay set by Wavelike steel webplate both sides as cross binding, the stability of control waveform steel web and verticality, thus effectively can ensure the accurate positioning of Wavelike steel webplate, linearly straight.In addition, the installation difficulty of Wavelike steel webplate significantly can be reduced by locating support, when any one steel web sections is installed, first by above current installed steel web segment lifting to described baseplate reinforcing bar skeleton, and adopt steel web position governor motion to adjust the position lifting the steel web sections put in place, and after adjusting to the right place, by backstay, current installed steel web sections is positioned, and the steel web sections of the installation be adjacent by current installed steel web sections is fastenedly connected; Meanwhile, when adopting steel web position governor motion to adjust the position lifting the steel web sections put in place, adjust with reference to steel web position reference frame, practical operation is very easy.

5, the Wavelike steel webplate PC i beam precasting process step adopted is simple, realization is convenient and the construction period is short, construction quality is easy to ensure, precast pedestal is adopted to have matched with locating support prefabrication of beam, adopt precasting yard concentration pre-casting, concrete prefabrication process is as follows: first carry out segmentation rolling in factory to Wavelike steel webplate, and at beam making field ground beam making bench of constructing, beam making bench pedestal is laid steel sheet as soffit formwork; Afterwards, colligation baseplate reinforcing bar skeleton on beam making bench, and the bellows that prestressed duct is continued to employ in advance; Subsequently, locating support is set up in beam making bench both sides; Then, the locating support set up is utilized to carry out scene splicing to Wavelike steel webplate; After Wavelike steel webplate installation, then build top board and concrete roof; Finally, cable stretching in base plate endosome is carried out.Because steel work processing work carries out in factory, saved a large amount of time, scene can concentration pre-casting, speed, and save a large amount of artificial, the turnover such as template materials'use quantity is few, can save more cost.

6, the good and good mechanical performance of prefabricated profiled Wavelike steel webplate PC i beam construction quality, corrugated steel web with between concrete floor and concrete roof and corrugated steel web be connected reliable with between crossbeam and diaphragm.Wavelike steel webplate PC i beam is combined by connector with the Wavelike steel webplate as web by concrete roof, concrete floor, again the top board of adjacent Wavelike steel webplate PC i beam, base plate, diaphragm and crossbeam are connected and composed box entirety, be equipped with the combined box beam structure of pre-stress system, have applied widely, speed of application is fast, structure is attractive in appearance, application and popularization value comparatively high.Wavelike steel webplate form of structure is adopted can effectively to alleviate prestressed concrete box-beam bridge weight, because Wavelike steel webplate is because it is being axially rugosity plate, when being subject to axial precompression effect, can free-extension.Therefore effect of contraction is not produced to upper and lower wing plate distortion, thus avoid the loss of the effective prestress caused due to the effect of contraction of web.

7, whole construction process step is simple, reasonable in design and realization facilitates, construction period is short, construction quality is high, prefabricated under not only into bridge being changed to the former construction technology by setting up support cast-in-place, install, again by fabricated construction technique that freely-supported is changed to continuous system, and adopt Wavelike steel webplate structure, solve the drawback that the deadweight of long-span beams body is larger, span bridge construction quality can be met, reach and save the duration, cost-saving object, adopt Wavelike steel webplate structure, make use of the advantage of Steel concrete rightly, improve the stability of structure, the service efficiency of intensity and material, alleviate girder deadweight, and good looking appearance, anti-seismic performance is good.In addition, do not have the combined box beam of road to construct for bridge two ends, difficulty of setting a roof beam in place is comparatively large, adopts the erection of full-sized car crane very high to place foundation requirement, cost compared with high, security risk is large; And adopting at precasting yard concentration pre-casting i beam in the present invention, Beam transportation vehicle is transferred to end of the bridge, and walking bridging machine is installed, and so just can eliminate above-mentioned defect.

8, popularizing application prospect is extensive, Wavelike steel webplate prestressed concrete combined box beam, in being particularly suitable for, the continuous girder bridge of Long span.

In sum, present invention process step simple, reasonable in design and realize convenient, the construction period is short, construction quality is high, adopt precast pedestal to have matched with locating support prefabrication of beam, and effectively can ensure the construction quality of constructed combination box beam bridge.

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

Accompanying drawing explanation

Fig. 1 is construction technology process block diagram of the present invention.

Fig. 1-1 is the precasting process FB(flow block) of the present invention when carrying out prefabricated to Wavelike steel webplate PC i beam.

Fig. 2 is the structural representation of the present invention prefabricated Wavelike steel webplate PC i beam.

Fig. 3-1 adopts by the present invention the structural representation of precast pedestal.

Fig. 3-2 adopts by the present invention the cross-sectional configuration schematic diagram of precast pedestal.

Fig. 4 adopts by the present invention the formwork view of baseplate molding template.

Fig. 5 adopts by the present invention the installation position schematic diagram of locating support.

Fig. 6 is the Construction State schematic diagram of the present invention when carrying out prefabricated to Wavelike steel webplate PC i beam.

Description of reference numerals:

1-concrete pedestal; 1-1-widened section; 1-2-middle part pedestal;

2-1-bed die steel plate; 2-2-side template; 3-expansion bolt;

4-fine sand; 5-concrete cushion; 6-locating part;

7-Wavelike steel webplate PC i beam; 7-1-concrete floor;

7-2-concrete roof; 7-3-Wavelike steel webplate; 8-locating support;

8-1-backstay; 8-2-top; 9-open pore steel plate connector;

10-1-supporting plate; 10-2-adjusting rod; 10-3-vertical pole;

11-angle bar; 11-1-vertical steel pipe; 11-2-horizontal steel pipe;

11-3-longitudinal steel pipe; 12-the first reinforced mesh;

13-baseboard prestress tendon; 14-backing plate.

Detailed description of the invention

The prefabricated Wavelike steel webplate PC of one as shown in Figure 1 i beam turns combination box bridge construction technique, combination box beam bridge of constructing comprise the combined box beam being erected at bridge lower support body and fastening, described combined box beam is divided into multiple combined box beam sections along vertical bridge to direction, each described combined box beam sections is formed by connecting by the Wavelike steel webplate PC i beam 7 of the symmetrical laying of two panels, and this technique comprises the following steps:

Step one, Wavelike steel webplate PC i beam are prefabricated: composition graphs 1-1, to construction described combined box beam need Wavelike steel webplate PC i beam 7 carry out prefabricated, process is as follows:

Step 101, precast pedestal are constructed: first at the precasting yard ground one deck concrete cushion 5 that tiles, and the precast pedestal of concrete pedestal 1 as Wavelike steel webplate PC i beam 7 of constructing on concrete cushion 5, refer to Fig. 3-1 and Fig. 3-2.

The length of described concrete pedestal 1 is not less than the longitudinal length of Wavelike steel webplate PC i beam 7, described Wavelike steel webplate PC i beam 7 is made up of concrete floor 7-1, concrete roof 7-2 above concrete floor 7-1 and the Wavelike steel webplate 7-3 be connected between concrete floor 7-1 and concrete roof 7-2, refers to Fig. 2.The width of described concrete pedestal 1 is not less than the width of concrete floor 7-1, roof steel bar skeleton is provided with in described concrete roof 7-2, be provided with rope in baseplate reinforcing bar skeleton and body in described concrete floor 7-1, in described body, rope is the presstressed reinforcing steel laid along the length direction of concrete floor 7-1.Shaping baseplate molding model sheetinstallat is built on concrete pedestal 1 to concrete floor 7-1, described baseplate molding template comprises the soffit formwork 2-1 be laid on concrete the pedestal 1 and side template 2-2 be arranged on bed die steel plate 2-1, described soffit formwork 2-1 is steel plate, refers to Fig. 4.Reinforced mesh is configured with in described concrete pedestal 1.

Step 102, soffit formwork are installed: be arranged on by soffit formwork 2-1 on concrete pedestal 1, and by multiple expansion bolt 3, soffit formwork 2-1 is fixed on concrete pedestal 1, multiple described expansion bolt 3 is all fixed on concrete pedestal 1 and its top and is all fixed on soffit formwork 2-1 with welding manner, be covered with layer of fine sand 4 between described soffit formwork 2 and concrete pedestal 1, refer to Fig. 4.

In step 103, base plate, cage of reinforcement is installed: on the soffit formwork 2-1 of installation in a step 102, install described baseplate reinforcing bar skeleton.

Step 104, base plate inner corrugated pipe are installed: in the described baseplate reinforcing bar skeleton of installation in step 103, the bellows that prestressed duct is continued to employ in advance; Described prestressed pore passage is the duct penetrated for rope in described body.In described body, rope is baseboard prestress tendon 13.

Step 105, locating support are installed and side template Zhi Li: the left and right sides of described concrete pedestal 1 sets up a locating support 8 respectively in a step 101, and prop up vertical side template 2-2 on soffit formwork 2-1.

Composition graphs 5 and Fig. 6, the height of described locating support 8 is lower than the bottom level of concrete roof 7-2, described locating support 8 comprises by the assembled bracing frame of many rod members and multiple backstay 8-1 positioned Wavelike steel webplate 7-3, multiple described backstay 8-1 lays from front to back along the length direction of concrete pedestal 1, and multiple described backstay 8-1 is installed on support frame as described above and it is all positioned at inside support frame as described above.

Step 106, Wavelike steel webplate are installed: be installed on above the skeleton of baseplate reinforcing bar described in step 103 by the Wavelike steel webplate 7-3 machined in advance, and positioned Wavelike steel webplate 7-3 by the backstay 8-1 that two described locating supports 8 are installed.

Step 107, underplate concrete are built: carry out concrete pouring construction to concrete floor 7-1;

Step 108, roof formed model sheetinstallat: in step 105 on two of installation described locating supports 8, the roof formed template for building formation of concrete top board 7-2 is installed.

In step 109, top board, cage of reinforcement is installed: in the roof formed template of installation in step 108, install described roof steel bar skeleton.

Step 110, concrete roof are built: carry out concrete pouring construction to concrete roof 7-2;

Cable stretching in step 111, bottom-plate body: after institute's concreting reaches design strength in step 107, penetrates rope in described body and carries out stretch-draw in described prestressed pore passage, and stretch-draw carries out prestress hole path pressure grouting and sealing off and covering anchorage process after completing.

In the present embodiment, combination box beam bridge of constructing be the long simple-supported thencontinuous assembling Wavelike steel webplate PC continuous box girder bridges in 40 meters, 2 hole, and its bridge long be 89.12m, thus need prefabricated 4 Wavelike steel webplate PC i beams 7.

The bridge lower support system of combination box beam bridge of constructing comprise former and later two abutments and the multiple bridge piers between two described abutments, described abutment is pillar and the pile foundation adopted is bored pile, and bridge pier is wall-pier; Superstructure adopts first prefabricate and install simply supported l beam (i.e. Wavelike steel webplate PC i beam 7), and rear cast-in-place seam in length and breadth forms the combining form of continuous box-beam structure.

Composition graphs 2, the 7-3 of Wavelike steel webplate described in step 101 is connected by top link with between concrete roof 7-2, and described top link is open pore steel plate connector 9 and it is welded on Wavelike steel webplate 7-3 top; Described open pore steel plate connector 9 has multiple first through hole along its length from front to back.Further, all horizontal bar is installed with in multiple described first through hole.Described upper horizontal bar is laid along the width of concrete pedestal 1.In the present embodiment, described Wavelike steel webplate 7-3 lays in vertical.

In the present embodiment, described open pore steel plate connector 9 comprises horizontal steel plate and two, left and right and is laid in vertical steel plate on described horizontal steel plate, described horizontal steel plate and Wavelike steel webplate 7-3 are vertical runs and it is weldingly fixed on Wavelike steel webplate 7-3 top, and described horizontal steel plate and two described vertical steel plates are all laid from front to back along the length direction of Wavelike steel webplate 7-3.Two described vertical steel plates have multiple described first through hole all along its length from front to back.

Described Wavelike steel webplate 7-3 is connected by bottom linker with between concrete floor 7-1, and described bottom linker is weldingly fixed on bottom Wavelike steel webplate 7-3 and it is build the shear connector in concrete floor 7-1.

During practice of construction, the inner side of the PC of Wavelike steel webplate described in step 101 i beam 7 is also provided with crossbeam and diaphragm, and described crossbeam and described diaphragm are reinforced concrete structure and cage of reinforcement set by the two inside is all fastenedly connected with set described roof steel bar skeleton in Wavelike steel webplate PC i beam 7 or described baseplate reinforcing bar skeleton and is integrated.Be connected with described diaphragm by described crossbeam between two in each described combined box beam sections described Wavelike steel webplate PC i beams 7, the quantity of described crossbeam is multiple and the crossbeam be connected between two described Wavelike steel webplate PC i beam 7 ends is end floor beam, and the quantity of described diaphragm is one or more and it is between two described end floor beams.

In the present embodiment, described bottom linker and described top link are embedded in concrete floor 7-1 and concrete roof 7-2 respectively, the rear and front end of described Wavelike steel webplate 7-3 is embedded in two described end floor beams respectively, when prefabricated Wavelike steel webplate PC i beam 7, in concrete floor 7-1, concrete roof 7-2, described crossbeam and described diaphragm pre-buried for be connected with opposite side Wavelike steel webplate PC i beam 7 in length and breadth to connecting reinforcement, describedly to protrude outwardly to outside prefabricated Wavelike steel webplate PC i beam 7 to connecting reinforcement in length and breadth.

For increasing the transverse integral of described combined box beam sections, in described combined box beam sections Wavelike steel webplate PC i beam 7 described in two panels concrete floor 7-1 between, all establish laterally wet seam between concrete roof 7-2, between described crossbeam and between described diaphragm, form closed case beam.Afterwards, cast-in-place longeron is set in continuous pier pier top portion, forms continuous box girder.

In the present embodiment, the longitudinal length of described Wavelike steel webplate PC i beam 7 is 39.6m, highly be 2.5m, the width of concrete floor 7-1 is 1m, the width of concrete roof 7-2 is 2.1m, concrete floor 7-1 and concrete roof 7-2 all adopts C55 concrete cast-in-situ, and Wavelike steel webplate 7-3 adopts the thick Wavelike steel webplate of 10mm and its material is Q345D steel.

Described Wavelike steel webplate 7-3 top is connected with adopting open pore steel plate connector 9 (specifically Double Opening steel plate connector) between concrete roof 7-2; Adopt embedded connection with between concrete floor 7-1 bottom described Wavelike steel webplate 7-3, take full advantage of the shearing resistance usefulness of the Wavelike steel webplate 7-3 tilted plate section in Transducers Embedded in Concrete plate.In described open pore steel plate connector 9, the thickness of slab of horizontal steel plate and vertical steel plate is 16mm.Be embedded in bottom described Wavelike steel webplate 7-3 in concrete floor 7-1, the sections be embedded in bottom described Wavelike steel webplate 7-3 in concrete floor 7-1 is that bottom embeds section, the length direction that described bottom embeds along concrete pedestal 1 in section has multiple second through hole from front to back, is all installed with lower horizontal bar in multiple described second through hole.Described lower horizontal bar is laid along the width of concrete pedestal 1.That is, described bottom linker is that described bottom embeds section, described bottom embeds multiple described second through hole that section is opened and Duo Gen is laid in described bottom and embeds lower horizontal bar in section.

The regulation of steel plate materials characteristic conforms " low-alloy high-tensile structural steel " (GB/T1591-2008) of described Wavelike steel webplate 7-3 and top link and bottom linker, its making meets the regulation of " composite bridge Wavelike steel webplate " (JT/T784-2010).Connection and the application of described Wavelike steel webplate 7-3 and top link and bottom linker need meet listed related specifications requirement in " highway Wavelike steel webplate prestressed concrete box-beam bridge design specifications " (DB41/T643-2010).The requirement that during welding, the welding material selected meets " mild steel and low-alloy high-strength steel covered are welding electrode " (GB981-76), and adapt with adopted steel material and intensity.

Because the junction surface of Wavelike steel webplate 7-3 and concrete floor 7-1 and concrete roof 7-2 is girder construction median ventral plate and the cooperative basis of roof and floor, longitudinal shear between main both opposings contact surface, prevent from producing Relative sliding between the two, and play opposing and start effect.In addition, junction surface also carries athwartship plane Moments, thus Wavelike steel webplate 7-3 is integrally formed with concrete slab, common bearing load.Because junction surface is directly connected to the supporting capacity of bed rearrangement bridge, junction surface is the key link of this type of bridge design and construction.In the present embodiment, on the vertical steel plate of described open pore steel plate connector 9 open the first through hole diameter for Φ 60mm and open the first through hole spacing be 150mm, and adopt the common weldering nail of M22 to connect, run through the indented bars (namely going up horizontal bar) that reinforcing bar adopts Φ 22mm, adopt two groove welding between Wavelike steel webplate 7-3 top and open pore steel plate connector 9 simultaneously.

In addition, Wavelike steel webplate 7-3 and the connection between crossbeam and diaphragm are also the binding sites of outbalance, because will guarantee that the shearing suffered by Wavelike steel webplate 7-3 can be delivered to bridge lower support system effectively.Described Wavelike steel webplate 7-3 is the same with the type of attachment of the connected mode between crossbeam and diaphragm and Wavelike steel webplate and concrete frange plate.

The displacement of step 2, Wavelike steel webplate PC i beam and erection: Wavelike steel webplate PC i beam 7 prefabricated in step one is moved to erection construction place from prefabricated place, and Wavelike steel webplate PC i beam 7 is erected at the described bridge lower support body of having constructed in advance and fastens;

Step 3, longitudinal wet joint are constructed: carry out longitudinal wet joint construction respectively to each combined box beam sections of constructed combined box beam, and obtain multiple combined box beam sections of having constructed;

When longitudinal wet joint construction is carried out to each combined box beam sections, the longitudinal wet joint between the concrete floor 7-1 of the two panels Wavelike steel webplate PC i beam 7 of this combined box beam sections of composition and between concrete roof 7-2 is constructed respectively;

Step 4, external tendon stretch-draw and system transform: lay multiple tracks external tendon respectively in each combined box beam sections of having constructed in step 3, and stretch-draw is carried out to external tendon described in multiple tracks; After stretch-draw completes, complete system transform, obtain the combination box beam bridge of having constructed.

In the present embodiment, in step 101 before precasting yard Horizon spreads concrete bed course 5, first backfill one deck backfill layer in prefabricated place, and carry out smooth to described backfill layer; Afterwards, the backfill layer after smooth tiles concrete cushion 5; Described backfill layer is gravel backfill layer or rock ballast backfill layer.

Meanwhile, described concrete pedestal 1 is provided with multiple expansion bolt 3, described expansion bolt 3 top is fixedly connected with welding manner with between soffit formwork 2.In the present embodiment, multiple described expansion bolt 3 is laid on the same line and its longitudinal centre line along soffit formwork 2 is laid from front to back.

Further, described concrete pedestal 1 upper surface camber with the camber of prefabricated Wavelike steel webplate prestressed concrete i beam identical.

In the present embodiment, the top, the left and right sides of described concrete pedestal 1 is all embedded with one angle bar 11, and described angle bar 11 is laid from front to back along the length direction of concrete pedestal 1.Angle bar 11 described in twice forms the top skeleton of concrete pedestal 1.

In the present embodiment, the both sides of described angle bar 11 are at right angles laid and the width on its both sides is 3cm ~ 5cm.

During practice of construction, reinforced mesh described in step 101 comprises one deck first reinforced mesh 12, the length of described first reinforced mesh 12 identical with the length of concrete pedestal 1 and its to be level lay.In the present embodiment, described first reinforced mesh 12 is made up of multiple tracks longitudinal reinforcement and multiple tracks transverse reinforcement, longitudinal reinforcement described in multiple tracks is all laid along the length direction of concrete pedestal 1, transverse reinforcement described in multiple tracks is all laid along the width of concrete pedestal 1, described in longitudinal reinforcement described in multiple tracks and multiple tracks, transverse reinforcement is all laid on same plane, described longitudinal reinforcement and described transverse reinforcement are the screw-thread steel that diameter is Φ 10mm ~ Φ 15mm, spacing described in the adjacent twice in front and back described in the adjacent twice of transverse reinforcement and left and right between longitudinal reinforcement is 15cm ~ 25cm.

In the present embodiment, the cross section of described concrete pedestal 1 is rectangle, described concrete pedestal 1 is made up of former and later two widened section 1-1 and the middle part pedestal 1-2 be connected between two described widened section 1-1, and identical and its width of the width of two described widened section 1-1 is greater than the width of middle part pedestal 1-2.

Have additional one deck second reinforced mesh in two described widened section 1-1, the length of described second reinforced mesh identical with the length of widened section 1-1 and its to be level lay.Described second reinforced mesh is positioned at above or below described first reinforced mesh 12.

During practice of construction, the length of described concrete pedestal 1 is 30m ~ 50m and it is highly 15cm ~ 25cm, and the thickness of described concrete cushion 5 is 8cm ~ 12cm, and the length of described widened section 1-1 is 1.5m ~ 2.5m.

In the present embodiment, the bed course that described concrete cushion 5 is paved into for C25 concrete, described concrete pedestal 1 is by the pedestal of C25 concreting.Described concrete pedestal 1 lays in level and itself and concrete cushion 5 are fastenedly connected.

In practice of construction process, first prefabricated place is selected, select one piece of 1500m near job site herein ²place as prefabricated place.After prefabricated place is determined, first backfill the thick rock ballast Ground Treatment of 50cm on the ground at precasting yard and flatten place, then shaking densification in fact with road roller, making degree of compaction reach more than 90%, now obtain described backfill layer; Afterwards, then the concrete cushion 5 that the 10cm that constructs is thick, with convenient construction concrete pedestal 1, and complete the cure process of Construction traffic passing road.During Specific construction, can according to actual needs, the thickness of concrete cushion 5 be adjusted accordingly.

The surrounding arranged outside of the pedestal of concrete described in step 101 1 has multiplely carries out spacing locating part 6 to side template 2-2, and described locating part 6 is fixed on concrete cushion 5; Carry out propping up immediately to side template 2-2 in step 105, pad between side template 2-2 and locating part 6 and fill backing plate 14, side template 2-2 is positioned.In the present embodiment, the spacing between adjacent two described locating parts 6 is 40cm ~ 60cm.Described locating part 6 is in the vertical embedded bar to laying, and the diameter of described embedded bar is Φ 12mm ~ Φ 20mm and it is highly 40cm ~ 60cm.

In the present embodiment, the quantity of described concrete pedestal 1 is 4,4 described concrete pedestals 1 carry out prefabricated to 4 described Wavelike steel webplate PC i beams 7 respectively, and 4 described concrete pedestals 1 are laid side by side and spacing between adjacent two described concrete pedestals 1 is 4.0m.In addition, also bottom each concrete pedestal 1, a pull bar preformed hole need be set every 50cm.Two ends (the about 1.10m place) notch that reserved 20cm is wide respectively of described soffit formwork 2-1, and the movable steel plate placing 1.6cm thick gives over to hanging beam mouth of revealing all the details, and is convenient to lift prefabricated profiled Wavelike steel webplate PC i beam 7.

To sum up, the present invention considers that beam body is from great, the factors such as the basic geology condition difference of concrete pedestal 1, concrete pedestal 1 is the C25 reinforced concrete structure and its upper berth 2mm steel plate (i.e. soffit formwork 2-1) that 20cm is thick, and configure the first reinforced mesh 12, and the longitudinal reinforcement of the first reinforced mesh 12 and transverse reinforcement adopt the indented bars of Φ 12mm and it is laid spacing and is 20cm, can guarantee that concrete pedestal 1 is conducted oneself with dignity at case beam, indeformable under the load actions such as stretch-draw operation, be not shifted, and the deviation that the physical dimension of beam body soffit formwork 2-1 can be made under any circumstance to occur is all within specification allowable error scope.

When constructing to soffit formwork 2-1, by the angle bar 11 that concrete pedestal 1 both sides are longitudinally pre-buried, control the elevation dimension of soffit formwork 2-1, guarantee the planeness of soffit formwork 2-1.Meanwhile, arrange along longitudinal length direction, concrete pedestal 1 both sides the embedded bar (i.e. locating part 6) that diameter is Φ 16mm, every root length 50cm, spacing 50cm, for reinforcing side template 2-2.In addition, in soffit formwork 2-1 work progress, in order to ensure the planeness (except antiarch value) of soffit formwork 2-1, centreline space along soffit formwork 2-1 lays expansion bolt 3 every 50cm ~ 100cm boring, soffit formwork 2-1 is fixed on closely on the concrete structure surface of concrete pedestal 1, lay layer of fine sand 4 simultaneously, fill up the gap between concrete pedestal 1 and soffit formwork 2-1, the top of expansion bolt 3 is together with end face steel plate (i.e. soffit formwork 2-1) plug welding, prevent end face steel plate from expanding with heat and contract with cold and be out of shape drum, and ensure that the planeness of soffit formwork 2-1 is not more than the error of 2mm.For reducing welding deformation, adopting layering, segmentation welding, welding deformation is reduced to minimum value.In order to prevent steel plate heat expansion, establish the wide shrinkage joint of 2mm at span centre interval.After the stretch-draw of Wavelike steel webplate PC i beam 7, will arch up in the middle part of beam body, executing in tension stress process in advance, the deadweight of whole beam body just shifts the point load for being supported on two ends gradually by the evenly distributed load be uniformly distributed on concrete floor 7-1, therefore, enlarge concrete section size (i.e. widened section 1-1) within the scope of each 2m in two ends of described concrete pedestal 1, set up one deck reinforced mesh (i.e. the second reinforced mesh) more simultaneously, after guaranteeing beam slab stretch-draw arch camber, there is not fracture, sink in concrete pedestal 1.

In addition, the beam body antiarch of Wavelike steel webplate PC i beam 7 arranges according to designing requirement, the end face of concrete pedestal 1 arranges antiarch curved surface by second-degree parabola, the span centre camber f value of concrete pedestal 1 gets 25mm, during practice of construction, method distributes camber parabolically, and in concrete pedestal 1 construction, antiarch arranges and answers linear irregularity.Described soffit formwork 2-1 and its tight welding consistent with the antiarch line style of concrete pedestal 1 is on the angle bar 11 of concrete pedestal 1 both sides.

In the present embodiment, described Wavelike steel webplate 7-3 is made up of the Wavelike steel webplate unit that multiple structure is all identical with size along its length, described Wavelike steel webplate unit is made up of two straight plate sections and two tilted plate sections, described straight plate section and institute's tilted plate section are in being laid staggeredly, two described straight plate sections are parallel laying and two described tilted plate sections are symmetrically laid, connected by arc section between the gradient that described straight plate section is adjacent, the wavelength of described Wavelike steel webplate 7-3 is 330+270+330+270=1200mm, wave height is 200mm, straight plate segment length is 330mm, tilted plate section length is 336mm, the bend radius of arc section is 200mm, thickness of slab is 10mm.The profile design of Wavelike steel webplate 7-3, except meeting the requirement of terms of mechanics, namely will shear lateral deflection Stability Checking Calculation by web shear stress and web, also needs to take into account the factor of making, construction, attractive in appearance and economic dispatch aspect etc.Because Wavelike steel webplate 7-3 is generally by clod wash processing and fabricating, thus to ensure that inner side bend radius is greater than 15 times of thickness of slab in principle, when requirement can not be reached, should ensure that steel have certain impact toughness, and the content of nitrogen element will be controlled.

During practice of construction, the 7-3 of Wavelike steel webplate described in step 101 is spliced by multiple steel web sections, multiple described steel web sections is laid from front to back along the length direction of concrete pedestal 1, is all connected by multiple high-strength bolt between adjacent two the described steel web sections in front and back.

Thus, consider that Wavelike steel webplate 7-3 is prefabricated in the factory, transport and the restriction of the aspect such as construction, Wavelike steel webplate 7-3 at vertical bridge to being designed to multiple described steel web sections, then the scene that is just transported to is carried out assembled, and the connected mode in Wavelike steel webplate 7-3 between adjacent two described steel web sections has high-strength bolt to connect and welding two kinds.In the present embodiment, described high-strength bolt is frictional high-strength bolts, be specially 10.9 grades of M22 friction-type double nut high-strength bolts (joining two nut 2 pads) to connect, the faying surface of Wavelike steel webplate 7-3 only needs to carry out inorganic zinc rich paint application, to meet rubbing surface requirement.

In the present embodiment, when carrying out the installation of base plate inner corrugated pipe in step 104, need adopt multiple bellows positioning device, position installed bellows, multiple described bellows positioning device is laid from front to back along the length direction of institute's spacer dimple pipe; Described bellows positioning device is the groined type locating rack be welded by four indented barss, and described groined type locating rack is sleeved on outside located bellows and it is weldingly fixed on described baseplate reinforcing bar skeleton.Described bellows is positioned at concrete floor 7-1 and lays on the position of described body rope.

Herein, bellows used is the plastic film capicitor of diameter of phi 90mm and its length is not less than the longitudinal length of Wavelike steel webplate PC i beam 7, and described bellows is spliced by multiple bellows segment and seam crossing adhesive plaster is wound around and pastes.In the present embodiment, the indented bars that described groined type locating rack adopts is I grade of reinforcing bar of diameter of phi 10mm, and four indented bars welding productions are become " # " shape and locates with described baseplate reinforcing bar frame welding, when thus colligation being carried out to described baseplate reinforcing bar skeleton in step 103, the installation of described bellows positioning device be noted.When the reinforcing bar in described baseplate reinforcing bar skeleton and prestress pipe (i.e. bellows) position of rope in described body have conflict time, should the position of reinforcing bar in described baseplate reinforcing bar skeleton, guarantee that prestress pipe position is correct, but forbid reinforcing bar to block.

Described bellows positioning device is connected with the spot welding of i beam base plate stirrup, be strictly on guard against dislocation and pipeline sagging, bellows location must be accurately, be strictly on guard against floating, sink and move left and right, its position deviation should in code requirement error range, and the gap of described bellows and bellows positioning device should not be greater than 3mm; Setting space is that straightway is not more than 1m, and curved section is not more than 0.5m.Bellows axis must be vertical with anchor plate.The pipeline line style of described bellows requires to install smooth-going, must not give a discount at straight line and curve transition, requires accurate positioning and smoother.

The jointing of described bellows adopts the bellows being greater than caliber 5mm as corrugated pipe connector, and its length gets 50cm, each point of two ends half.Described corrugated pipe connector plastic adhesive tape is wound around mortar leakage prevention, should mutually be held out against, in case gone out and blocking pipe by head harness at the bellows of joint weakness during lashing by two corrugated pipe connectors connect.

In the present embodiment, the length of locating support 8 described in step 105 is identical with the length of concrete pedestal 1.

In the present embodiment, described backstay 8-1 comprises the top 8-2 that outer end is fixed on horizon bar on support frame as described above and is arranged on described horizon bar the inner, described top 8-2 prop up withstand on Wavelike steel webplate 7-3 sidewall on.

Further, described horizon bar is adjustable rod.In the present embodiment, described top 8-2 is square plate.

Meanwhile, the inner side of locating support 8 described in step 105 is provided with multiple steel web position governor motion adjusted the position of Wavelike steel webplate 7-3, and multiple described steel web position governor motion is laid from front to back along the length direction of concrete pedestal 1.

In the present embodiment, described steel web position governor motion comprises the adjusting rod 10-2 being arranged on supporting plate 10-1 on support frame as described above and being positioned on supporting plate 10-1, and one end of described adjusting rod 10-2 stretches in the first through hole that open pore steel plate connector 9 is opened and its other end is positioned on supporting plate 10-1.Described supporting plate 10-1 is arranged on support frame as described above by vertical pole 10-3, and described vertical pole 10-3 is Height Adjustable pole.Described supporting plate 10-1 is concave shape plate.

In the present embodiment, support frame as described above is steel pipe support, described steel pipe support comprises many vertical steel pipe 11-1 and multiple level connection joint frame be fixed on from the bottom to top on many described vertical steel pipe 11-1, many described vertical steel pipe 11-1 divide M to arrange N row to lay, and wherein M and N is positive integer and the two is all not less than 2; Described level connection joint frame comprises M root and is connected to M and arranges horizontal steel pipe 11-2 on described vertical steel pipe 11-1 and N root and be connected to N and arrange longitudinal steel pipe 11-3 on described vertical steel pipe 11-1.

N arranges described vertical steel pipe 11-1 and all lays from front to back along the length direction of concrete pedestal 1, the row vertical steel pipe 11-1 that N arranges near concrete pedestal 1 in described vertical steel pipe 11-1 is inner side steel pipe, and inner side steel pipe described in every root is all provided with a described steel web position governor motion.Described longitudinal steel pipe 11-3 and concrete bed 1 are in parallel laying.

In the present embodiment, N=2.Further, described steel pipe support is tube and couple scaffold.

During practice of construction, can according to specific needs, the value size of M and N be adjusted accordingly.

In the present embodiment, two described locating supports 8 are also erected with steel web position reference frame, described steel web position reference chord position is directly over concrete pedestal 1 and it is highly higher than the overhead height of Wavelike steel webplate 7-3, described steel web is installed frame of reference and is comprised two longitudinal register reference lever and Duo Gen and be laid in located lateral reference lever in two described longitudinal register reference lever from front to back, two described longitudinal register reference lever all to be laid and its length is identical with the length of concrete pedestal 1 along the length direction of concrete pedestal 1, many described located lateral reference lever are all vertical runs with described longitudinal register reference lever.Two described longitudinal register reference lever are laid in the left and right sides, top of Wavelike steel webplate 7-3.

In the present embodiment, described longitudinal register reference lever is longitudinal elongated 40m and the steel pipe of diameter of phi 50mm, and the spacing between two described longitudinal register reference lever is 1m, and described located lateral reference lever is steel pipe and its laying spacing is 1m.

When reality carries out on-site consolidation to Wavelike steel webplate 7-3, for ensureing the accurate positioning of Wavelike steel webplate 7-3, linearly straight, by described steel web position reference frame to the lateral attitude of Wavelike steel webplate 7-3 with highly accurately control, simultaneously using the backstay 8-1 set by Wavelike steel webplate 7-3 both sides as cross binding, rib reinforcement is carried on the back, the stability of control waveform steel web 7-3 and verticality with the lumps of wood.

In the present embodiment, before step 106 carries out Wavelike steel webplate installation, need in the surfaces externally and internally of the Wavelike steel webplate 7-3 machined in advance evenly brushing one deck corrosion resistant coating coating, the degree of depth of described corrosion resistant coating coating Transducers Embedded in Concrete base plate 7-1 and concrete roof 7-2 is not less than 2cm.Shutoff is all carried out by sealing material in described Wavelike steel webplate 7-3 and the junction between concrete floor 7-1 and concrete roof 7-2.

In addition, when adopting high-strength bolt to connect between the steel web sections due to Wavelike steel webplate 7-3, for ensureing the friction factor of faying surface, the faying surface of Wavelike steel webplate 7-3 only carries out primer painting, forbids carrying out finish paint application.Meanwhile, the junction of described concrete floor 7-1 top and Wavelike steel webplate 7-3 is set to drainage slope, prevents rain and dew from infiltrating, and the junction of described crossbeam and Wavelike steel webplate 7-3 adopts sealing material to seal, and prevents rain and dew water from infiltrating.

Wherein, the anticorrosive coating operation of Wavelike steel webplate 7-3 surfaces externally and internally refers to table 1 and table 2:

Table 1 Wavelike steel webplate outside surface anticorrosion coating process table

Table 2 Wavelike steel webplate inner surface anticorrosive coating activity list

In the present embodiment, described steel web sections is formed in factory's rolling in advance, and when carrying out Wavelike steel webplate installation in step 106, the length direction along concrete pedestal 1 is installed each steel web sections from front to back; Wherein, when any one steel web sections is installed, first by above current installed steel web segment lifting to described baseplate reinforcing bar skeleton, and adopt described steel web position governor motion to adjust the position lifting the steel web sections put in place, and after adjusting to the right place, by backstay 8-1, current installed steel web sections is positioned, and the steel web sections of the installation be adjacent by current installed steel web sections is fastenedly connected.

Meanwhile, when adopting described steel web position governor motion to adjust the position lifting the steel web sections put in place, adjust with reference to described steel web position reference frame.

And, in described Wavelike steel webplate 7-3 installation process, by the longitudinal linear straight degree controlling each steel web sections and connect of transit, the high consistency that each steel web sections connects is controlled with level gauge, with spirit level, planeness control is carried out to each steel web sections junction, control the verticality of each steel web sections with plummet, by above each side controlling measurement, verification, Wavelike steel webplate 7-3 is made to locate specification, accurately, within design and specification allowable error scope.

In addition, in Wavelike steel webplate 7-3 installation process, must ensure that overall structure is stable and not cause distortion and displacement, thus at the upper and lower side of corrugated steel web 7-3, spacer bars being set respectively, to ensure the angle of inclination of corrugated steel web 7-3.Meanwhile, the horizontal bar exposed in concrete floor 7-1 and concrete roof 7-2 and the weldering of corrugated steel web 7-3 are followed closely and are held together, to strengthen the integral rigidity of structure.

During practice of construction, corrugated steel web 7-3 and the connected mode between concrete floor 7-1 and concrete roof 7-2 have two kinds: edge of a wing type and embedded type.Wherein, edge of a wing type refers at corrugated steel web 7-3 upper end welded flange steel plate and configures the edge of a wing type of open pore steel plate connector 9; Embedded type refers to and to be directly embedded to by corrugated steel web 7-3 in concrete floor 7-1 and to lay circular hole on the buried section of corrugated steel web 7-3.It is adopted with Wavelike steel webplate 7-3 by top flange steel plate to dock two groove welding that edge of a wing type connects, by open pore steel plate connector 9, the upper horizontal bar in concrete roof 7-2 is worn in the preformed hole (i.e. described first through hole) of corrugated steel web 7-3 again, then fluid concrete top board 7-2.It is be directly embedded in concrete floor 7-1 by corrugated steel web 7-3 that embedded type connects, again the lower horizontal bar in concrete floor 7-1 is run through the reserved circular hole (i.e. described second through hole) bottom corrugated steel web 7-3, then fluid concrete base plate 7-1.Longitudinal shearing resistance is mainly by the tilted plate section of the concrete in the first through hole and the second through hole, upper horizontal bar and lower horizontal bar and corrugated steel web 7-3, and the peg of welding can bear the effect of web surface Moments.

In the present embodiment, in the upper end of corrugated steel web 7-3 welding steel frange plate connector (i.e. open pore steel plate connector 9), wear muscle in the steel plate perforate of frange plate connector and form edge of a wing type connection; Embed in corrugated steel web 7-3 lower end in concrete floor 7-1, and corrugated steel web 7-3 lower end perforate and wear muscle formed shear connector, formation embedded type connects, thus strengthens the connection of corrugated steel web 7-3 and concrete floor 7-1 and concrete roof 7-2, and integral anti-shearing ability improves greatly.It is to be noted that described lower horizontal bar is first worn before corrugated steel web 7-1 being carried out to lifting location in construction; Described upper horizontal bar was worn before described roof formed formwork support arrangement, otherwise the muscle of wearing of upper horizontal bar and lower horizontal bar will suitable difficulty or at all cannot pass.

In the present embodiment, described diaphragm be between two described end floor beams middle part in diaphragm.Described corrugated steel web 7-3 and the connection between described diaphragm and crossbeam are also important junctions, guarantee that the shearing suffered by corrugated steel web 7-3 can pass to described bridge lower support system effectively, connected mode between the two has edge of a wing type and embedded type.Wherein, edge of a wing type welds open pore steel plate on frange plate; Embedded type is that described diaphragm or described diaphragm are stretched in corrugated steel web end, and stretch into part be provided with circular hole or configuration Welded-Stud Conectors.

In the present embodiment, described crossbeam and described diaphragm are stretched in the plate side of described corrugated steel web 7-3, and be provided with the hole facilitating the transverse reinforcement in described crossbeam or described diaphragm to penetrate stretching into part, and be provided with Welded-Stud Conectors, make it to be combined better with concrete.

In the present embodiment, roof formed template described in the 2-2 of side template described in step 101 and step 108 is all for by the assembled template of polylith bamboo slab rubber.

Before described roof formed template being installed in step 108, first two described locating supports 8 in step 105 are all provided with the temporary supporting system supported described roof formed template, and described temporary supporting system is assembled by the lumps of wood that many are laid on support frame as described above.

In the present embodiment, when concreting is carried out to concrete floor 7-1 and concrete roof 7-2, due to case beam thin wall construction, reinforcement placement is intensive, add the impact of bellows, adopt the particle diameter of concrete medium stone to be strict controlled in below 2cm, simultaneously concrete should possess good mobility, and the slump should control at 110mm ~ 130mm.In addition, when concrete floor 7-1 and concrete roof 7-2 is built, before first concrete enters mould, to ensure that concrete segregation phenomenon does not occur.And, build from the two ends of Wavelike steel webplate PC i beam 7 toward beam center position, by one end concreting base plate 7-1 to 1/3 of beam length, the other end then returning beam carries out the concrete monobloc cast of concrete floor 7-1 and concrete roof 7-2 and advances to starting end gradually.

For the concrete making beam body levels build is combined closely, when vibrating upper strata concrete, vibrating spear must insert lower floor concrete 5 ~ 10cm degree of depth.When vibrating, beam-ends anchor plate position is the emphasis of quality control, should guarantee that anchor plate is vertical with prestressing tendon during construction; pipeline center should be aimed in anchor plate center; in pipeline dense part and anchorage zone, strictly should control concrete vibrating and health, guarantee concrete quality.Because beam-ends reinforcing bar is closeer, inner and outer template spacing is less, and 30 type vibrating spears need be adopted to vibrate, but should be specifically noted that to prevent simultaneously and leakage shake and cross phenomenon of shaking.

In the present embodiment, in described concrete floor 7-1, in set body, the quantity of rope is twice, in body described in twice, rope is laid in the left and right sides, inside of concrete floor 7-1 and the two is laid in same level respectively, and in body described in twice, Suo Jun lays along the length direction of concrete floor 7-1.

To when in described body, Suo Jinhang penetrates, penetrate after underplate concrete 7-1 builds, with manually penetrating from one end, when penetrating, steel Shu Duantou adopts conical steel pipe parcel, to prevent steel hinge line head from puncturing pipeline, reduce to penetrate resistance, in steel strand process simultaneously, penetrate at need if run into, must not clash in order to avoid puncture pipeline.

In the present embodiment, the symmetrical stretch-draw in Suo Caiyong two ends in described body.After cable stretching completes in bottom-plate body in step 111, carry out prestress hole path pressure grouting and grouting sealing off and covering anchorage, wherein prestress hole path pressure grouting Main Function is protection prestressing force steel hinge line; prevent corrosion; be formed with adhesion stress, alleviate ground tackle bearing capacity, ensure presstressed reinforcing steel and concrete acting in conjunction.In construction, guarantee that pipeline pneumatic mortar is full, closely knit.In the present embodiment, adopt piston type mud jacking construction technology, and mud jacking must complete in 48 hours after stretch-draw completes.

In the present embodiment, when prefabricated Wavelike steel webplate PC i beam 7 being moved to erection construction place from prefabricated place in step 2, adopting two 120 tons of cranes from depositing the lifting of beam pedestal, lifting on Beam transportation vehicle.100% of design strength is reached and prestress hole path pressure grouting intensity just can carry out movement after reaching designing requirement in the intensity of Wavelike steel webplate PC i beam 7.

Wavelike steel webplate PC i beam 7 is erected at described bridge lower support body when fastening, with two 100T crane erections, employing cluster lifts, hoisting point position is arranged on beam body apart from parados costa and bridge pier center line 1.1m place, beam body cantilever side is arranged on direction across bridge distance cantilever root 1m position, lifting preformed hole is arranged by pre-buried pvc pipe, after Wavelike steel webplate PC i beam 7 has set up, stablize and balance for keeping beam body, at span centre and 1/4th positions, lumps of wood diagonal brace is set, wet seam construction location place between the Wavelike steel webplate PC i beam 7 that two panels symmetry is laid by direction across bridge is welded to connect to connecting reinforcement in length and breadth, prevent from and overturn situation appearance.

When constructing to the longitudinal wet joint between the concrete floor 7-1 of two panels Wavelike steel webplate PC i beam 7 and between concrete roof 7-2 in step 3, the wet seam between the crossbeam to two panels Wavelike steel webplate PC i beam 7 and between the diaphragm of two panels Wavelike steel webplate PC i beam 7 is also needed to construct.

In the present embodiment, when carrying out longitudinal wet joint construction in step 3, the template adopted is assembled by polylith bamboo slab rubber, and support system adopts and hangs modular form.Wherein, the wide 2.8m of wet seam of described underplate concrete 7-1 and its thickness is 18cm, longitudinal length is with often across case beam length, and wet seam adopts C55 concreting.

In the present embodiment, described diaphragm be between two described end floor beams middle part in diaphragm, described middle diaphragm is provided with the transfer turned to described external tendon, and the external tendon being positioned at described combined box beam sections is in the shape of the letter V or inverted v-shaped and it is along vertical bridge to laying; When laying external tendon in step 4 in each combined box beam sections, the two ends of described external tendon are anchored at respectively on two described end floor beams; External tendon in multiple described combined box beam sections is fold-line-shaped.Transfer is a kind of special tectonic of external prestressing tendon, and it is that external prestressing tendon, across the interior unique and associated component of prestressing force force structure, is one of structure of most important most critical in externally prestressed bridge except anchoring structure; The material multiselect steel of transfer and concrete, the effect of transfer is the horizontal and vertical lateral force that carrier external beam produces, restriction external tendon drift, the eccentric throw of adjustment external tendon.

Further, in described combined box beam sections lay external tendon quantity be four roads.

When carrying out system transform in step 4, to carrying out the wet seam construction of transverse direction between adjacent two described combined box beam sections, make to be connected as one by longeron between adjacent two described combined box beam sections, described longeron is reinforced concrete structure, and the cage of reinforcement set by cage of reinforcement set in described longeron and described crossbeam and described roof steel bar skeleton and described baseplate reinforcing bar skeleton are fastenedly connected and are integrated.Described longeron is connected between adjacent two described combined box beam sections, and it is the reinforced concrete structure that laterally wet seam construction is formed.

In the present embodiment, external tendon set in the case of described combined box beam sections is epoxy full coat dress soap-free emulsion polymeization external prestressing steels, its two ends are anchored on described end floor beam, centre is through the transfer be embedded on concrete floor 7-1 and described middle diaphragm and damper steel plate and turn to steel pipe (to turn to diameter of steel tube 1cm larger than external tendon external diameter, and be arranged at the identical turning radius of presstressed reinforcing steel, the each 3cm of diaphragm is stretched out in both sides, make horn mouth shape, facilitate presstressed reinforcing steel to pass through and turn to), make external tendon across in broken line form.

In the present embodiment, in step 2, Wavelike steel webplate PC i beam 7 is erected at before the described bridge lower support body of having constructed in advance fastens, first fasten laying temporary support in described bridge lower support body, then the Wavelike steel webplate PC i beam 7 of the multiple described combined box beam sections of composition is all erected on described temporary support forms simply-supported state; When carrying out external tendon stretch-draw and system transform in step 4, after in longitudinal wet joint work progress in step 3, the intensity of institute's concreting reaches more than 90% of design strength, stretch-draw is carried out to external tendon described in multiple tracks, and after stretch-draw completes, respectively anchoring is carried out to external tendon described in multiple tracks; Subsequently, described combined box beam is dropped on described bridge lower support body and fasten on set permanent bearing, and remove described bridge lower support body and fasten laid temporary support, obtain the combined box beam of having constructed.

The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. a prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique, combination box beam bridge of constructing comprise the combined box beam being erected at bridge lower support body and fastening, described combined box beam is divided into multiple combined box beam sections along vertical bridge to direction, each described combined box beam sections is formed by connecting by the Wavelike steel webplate PC i beam (7) of the symmetrical laying of two panels, it is characterized in that this technique comprises the following steps:

Step one, Wavelike steel webplate PC i beam are prefabricated: to construction described combined box beam need Wavelike steel webplate PC i beam (7) carry out prefabricated, process is as follows:

Step 101, precast pedestal are constructed: first at the precasting yard ground one deck concrete cushion (5) that tiles, and at the precast pedestal of concrete cushion (5) upper construction concrete pedestal (1) as Wavelike steel webplate PC i beam (7);

The length of described concrete pedestal (1) is not less than the longitudinal length of Wavelike steel webplate PC i beam (7), described Wavelike steel webplate PC i beam (7) is by concrete floor (7-1), the concrete roof (7-2) and the Wavelike steel webplate (7-3) be connected between concrete floor (7-1) and concrete roof (7-2) that are positioned at concrete floor (7-1) top form, the width of described concrete pedestal (1) is not less than the width of concrete floor (7-1), roof steel bar skeleton is provided with in described concrete roof (7-2), rope in baseplate reinforcing bar skeleton and body is provided with in described concrete floor (7-1), in described body, rope is the presstressed reinforcing steel laid along the length direction of concrete floor (7-1), shaping baseplate molding model sheetinstallat is built on concrete pedestal (1) to concrete floor (7-1), described baseplate molding template comprises the soffit formwork (2-1) be laid on concrete pedestal (1) and the side template (2-2) be arranged on bed die steel plate (2-1), and described soffit formwork (2-1) is steel plate, reinforced mesh is configured with in described concrete pedestal (1),

Step 102, soffit formwork are installed: be arranged on by soffit formwork (2-1) on concrete pedestal (1), and by multiple expansion bolt (3), soffit formwork (2-1) is fixed on concrete pedestal (1), multiple described expansion bolt (3) is all fixed on that concrete pedestal (1) is upper and its top is all fixed on soffit formwork (2-1) with welding manner, is covered with layer of fine sand (4) between described soffit formwork (2) and concrete pedestal (1);

In step 103, base plate, cage of reinforcement is installed: on the soffit formwork (2-1) of installation in a step 102, install described baseplate reinforcing bar skeleton;

Step 104, base plate inner corrugated pipe are installed: in the described baseplate reinforcing bar skeleton of installation in step 103, the bellows that prestressed duct is continued to employ in advance; Described prestressed pore passage is the duct penetrated for rope in described body;

Step 105, locating support are installed and side template Zhi Li: the left and right sides of described concrete pedestal (1) sets up a locating support (8) respectively in a step 101, and at the upper vertical side template (2-2) of soffit formwork (2-1);

The height of described locating support (8) is lower than the bottom level of concrete roof (7-2), described locating support (8) comprises by the assembled bracing frame of many rod members and multiple backstay (8-1) positioned Wavelike steel webplate (7-3), multiple described backstay (8-1) is laid from front to back along the length direction of concrete pedestal (1), and multiple described backstay (8-1) is installed on support frame as described above and it is all positioned at inside support frame as described above;

Step 106, Wavelike steel webplate are installed: be installed on above the skeleton of baseplate reinforcing bar described in step 103 by the Wavelike steel webplate machined in advance (7-3), and are positioned Wavelike steel webplate (7-3) by the backstay (8-1) that two described locating supports (8) are installed;

Step 107, underplate concrete are built: carry out concrete pouring construction to concrete floor (7-1);

Step 108, roof formed model sheetinstallat: on two described locating supports (8) of installation in step 105, install and be used for the roof formed template of building formation of concrete top board (7-2);

In step 109, top board, cage of reinforcement is installed: in the roof formed template of installation in step 108, install described roof steel bar skeleton;

Step 110, concrete roof are built: carry out concrete pouring construction to concrete roof (7-2);

Cable stretching in step 111, bottom-plate body: after institute's concreting reaches design strength in step 107, penetrates rope in described body and carries out stretch-draw in described prestressed pore passage, and stretch-draw carries out prestress hole path pressure grouting and sealing off and covering anchorage process after completing;

The displacement of step 2, Wavelike steel webplate PC i beam and erection: Wavelike steel webplate PC i beam (7) prefabricated in step one is moved to erection construction place from prefabricated place, and Wavelike steel webplate PC i beam (7) is erected at the described bridge lower support body of having constructed in advance and fastens;

Step 3, longitudinal wet joint are constructed: carry out longitudinal wet joint construction respectively to each combined box beam sections of constructed combined box beam, and obtain multiple combined box beam sections of having constructed;

When longitudinal wet joint construction is carried out to each combined box beam sections, the longitudinal wet joint between the concrete floor (7-1) of two panels Wavelike steel webplate PC i beam (7) of this combined box beam sections of composition and between concrete roof (7-2) is constructed respectively;

Step 4, external tendon stretch-draw and system transform: lay multiple tracks external tendon respectively in each combined box beam sections of having constructed in step 3, and stretch-draw is carried out to external tendon described in multiple tracks; After stretch-draw completes, complete system transform, obtain the combination box beam bridge of having constructed.

2. turn combination box bridge construction technique according to one according to claim 1 prefabricated Wavelike steel webplate PC i beam, it is characterized in that: in step 2, Wavelike steel webplate PC i beam (7) is erected at before the described bridge lower support body of having constructed in advance fastens, first fasten laying temporary support in described bridge lower support body, then the Wavelike steel webplate PC i beam (7) of the multiple described combined box beam sections of composition is all erected on described temporary support forms simply-supported state; When carrying out external tendon stretch-draw and system transform in step 4, after in longitudinal wet joint work progress in step 3, the intensity of institute's concreting reaches more than 90% of design strength, stretch-draw is carried out to external tendon described in multiple tracks, and after stretch-draw completes, respectively anchoring is carried out to external tendon described in multiple tracks; Subsequently, described combined box beam is dropped on described bridge lower support body and fasten on set permanent bearing, and remove described bridge lower support body and fasten laid temporary support, obtain the combined box beam of having constructed.

3. turn combination box bridge construction technique according to the prefabricated Wavelike steel webplate PC of the one described in claim 1 or 2 i beam, it is characterized in that: the inner side of the PC of Wavelike steel webplate described in step 101 i beam (7) is also provided with crossbeam and diaphragm, described crossbeam and described diaphragm are reinforced concrete structure and cage of reinforcement set by the two inside is all fastenedly connected with set described roof steel bar skeleton in Wavelike steel webplate PC i beam (7) or described baseplate reinforcing bar skeleton and is integrated; Be connected with described diaphragm by described crossbeam between two in each described combined box beam sections described Wavelike steel webplate PC i beams (7), the quantity of described crossbeam is multiple and the crossbeam be connected between two described Wavelike steel webplate PC i beam (7) ends is end floor beam, and the quantity of described diaphragm is one or more and it is between two described end floor beams; When constructing to the longitudinal wet joint between the concrete floor (7-1) of two panels Wavelike steel webplate PC i beam (7) and between concrete roof (7-2) in step 3, the wet seam between the crossbeam to two panels Wavelike steel webplate PC i beam (7) and between the diaphragm of two panels Wavelike steel webplate PC i beam (7) is also needed to construct.

4. turn combination box bridge construction technique according to one according to claim 3 prefabricated Wavelike steel webplate PC i beam, it is characterized in that: described diaphragm be between two described end floor beams middle part in diaphragm, described middle diaphragm is provided with the transfer turned to described external tendon, and the external tendon being positioned at described combined box beam sections is in the shape of the letter V or inverted v-shaped and it is along vertical bridge to laying; When laying external tendon in step 4 in each combined box beam sections, the two ends of described external tendon are anchored at respectively on two described end floor beams; External tendon in multiple described combined box beam sections is fold-line-shaped; When carrying out system transform in step 4, to carrying out the wet seam construction of transverse direction between adjacent two described combined box beam sections, make to be connected as one by longeron between adjacent two described combined box beam sections, described longeron is reinforced concrete structure, and cage of reinforcement set in described longeron and the interior set cage of reinforcement of described crossbeam, described roof steel bar skeleton, described baseplate reinforcing bar skeleton are all fastenedly connected and are integrated.

5. turn combination box bridge construction technique according to the prefabricated Wavelike steel webplate PC of the one described in claim 1 or 2 i beam, it is characterized in that: when carrying out the installation of base plate inner corrugated pipe in step 104, multiple bellows positioning device need be adopted, position installed bellows, multiple described bellows positioning device is laid from front to back along the length direction of institute's spacer dimple pipe; Described bellows positioning device is the groined type locating rack be welded by four indented barss, and described groined type locating rack is sleeved on outside located bellows and it is weldingly fixed on described baseplate reinforcing bar skeleton.

6. turn combination box bridge construction technique according to the prefabricated Wavelike steel webplate PC of the one described in claim 1 or 2 i beam, it is characterized in that: be connected by top link between Wavelike steel webplate described in step 101 (7-3) with concrete roof (7-2), described top link is open pore steel plate connector (9) and it is welded on Wavelike steel webplate (7-3) top; Described open pore steel plate connector (9) has multiple first through hole along its length from front to back.

7. turn combination box bridge construction technique according to one according to claim 6 prefabricated Wavelike steel webplate PC i beam, it is characterized in that: the inner side of locating support described in step 105 (8) is provided with multiple steel web position governor motion adjusted the position of Wavelike steel webplate (7-3), and multiple described steel web position governor motion is laid from front to back along the length direction of concrete pedestal (1);

Described steel web position governor motion comprises the supporting plate (10-1) be arranged on support frame as described above and the adjusting rod (10-2) be positioned on supporting plate (10-1), and one end of described adjusting rod (10-2) stretches in the first through hole that open pore steel plate connector (9) is opened and its other end is positioned on supporting plate (10-1).

8. turn combination box bridge construction technique according to one according to claim 7 prefabricated Wavelike steel webplate PC i beam, it is characterized in that: Wavelike steel webplate described in step 101 (7-3) is spliced by multiple steel web sections, multiple described steel web sections is laid from front to back along the length direction of concrete pedestal (1), is all connected by multiple high-strength bolt between adjacent two the described steel web sections in front and back;

Described steel web sections is formed in factory's rolling in advance, and when carrying out Wavelike steel webplate installation in step 106, the length direction along concrete pedestal (1) is installed each steel web sections from front to back; Wherein, when any one steel web sections is installed, first by above current installed steel web segment lifting to described baseplate reinforcing bar skeleton, and adopt described steel web position governor motion to adjust the position lifting the steel web sections put in place, and after adjusting to the right place, by backstay (8-1), current installed steel web sections is positioned, and the steel web sections of the installation be adjacent by current installed steel web sections is fastenedly connected.

9. turn combination box bridge construction technique according to the prefabricated Wavelike steel webplate PC of the one described in claim 1 or 2 i beam, it is characterized in that: roof formed template described in side template described in step 101 (2-2) and step 108 is all for by the assembled template of polylith bamboo slab rubber;

The surrounding arranged outside of the pedestal of concrete described in step 101 (1) has multiplely carries out spacing locating part (6) to side template (2-2), and described locating part (6) is fixed on concrete cushion (5); Carry out propping up immediately to side template (2-2) in step 105, pad between side template (2-2) and locating part (6) and fill backing plate (14), side template (2-2) is positioned;

The length of locating support described in step 105 (8) is identical with the length of concrete pedestal (1);

Before described roof formed template being installed in step 108, first two described locating supports (8) in step 105 are all provided with the temporary supporting system supported described roof formed template, and described temporary supporting system is assembled by the lumps of wood that many are laid on support frame as described above.

10. turn combination box bridge construction technique according to the prefabricated Wavelike steel webplate PC of the one described in claim 1 or 2 i beam, it is characterized in that: in step 101 before precasting yard Horizon spreads concrete bed course (5), first backfill one deck backfill layer in prefabricated place, and carry out smooth to described backfill layer; Afterwards, the backfill layer after smooth tiles concrete cushion (5); Described backfill layer is gravel backfill layer or rock ballast backfill layer; Be connected by bottom linker between described Wavelike steel webplate (7-3) with concrete floor (7-1), described bottom linker is weldingly fixed on Wavelike steel webplate (7-3) bottom and it is for building the shear connector in concrete floor (7-1); Before step 106 carries out Wavelike steel webplate installation, need in the surfaces externally and internally of the Wavelike steel webplate machined in advance (7-3) evenly brushing one deck corrosion resistant coating coating, the degree of depth of described corrosion resistant coating coating Transducers Embedded in Concrete base plate (7-1) and concrete roof (7-2) is not less than 2cm; Shutoff is all carried out by sealing material in described Wavelike steel webplate (7-3) and the junction between concrete floor (7-1) and concrete roof (7-2); The junction of described concrete floor (7-1) top and Wavelike steel webplate (7-3) is set to drainage slope.