Construction method of beam-slab type superstructure of high-pile wharf

Abstract

The application discloses a construction method of a beam-slab type high-pile wharf upper structure, and the upper structure comprises a lower cross beam, a berthing component, a walkway plate, a longitudinal beam, an upper cross beam, a surface plate and a surface layer; the front edge bottom of the lower cross beam extends downward and has a lower cross beam sunken section with a rear end surface being an inclined surface; the construction method of the application is to divide the lower cross beam into a lower cross beam front edge section and a lower cross beam rear edge section, and to divide the upper cross beam into an upper cross beam front edge section and an upper cross beam rear edge section; the construction method of the application is performed according to the following steps: lower cross beam rear edge section enclosure system installation, lower cross beam sunken section enclosure system installation, berthing component installation, lower cross beam sunken section pouring, lower cross beam rear edge section pouring, walkway plate resting pier pouring, rear edge longitudinal beam installation, upper cross beam rear edge section pouring, walkway plate installation, lower cross beam front edge section pouring, front edge longitudinal beam installation, upper cross beam front edge section pouring, surface plate installation and surface layer pouring; the application can improve the construction efficiency of the wharf upper structure and effectively ensure the construction progress of the project.

Description

TECHNICAL FIELD

[0001] The present application relates to a construction method of beam-slab type high-pile wharf superstructure. BACKGROUND

[0002] The high-pile wharf is composed of superstructure (pile cap or bearing platform), pile foundation, shore connecting structure, shore lock and wharf equipment. The superstructure constitutes the wharf ground and connects the pile foundations into a whole, directly bears the vertical and horizontal loads acting on the wharf ground and transmits them to the pile foundations. The beam-slab type high-pile wharf needs to be built in a certain sea area. The superstructure of the beam-slab type high-pile wharf includes face plate, longitudinal beam, transverse beam, berthing member and mooring column. The design high water level of the construction sea area is +7.45m, the tidal range is about 7m, the wharf face elevation is +11m, and the transverse beam front edge is designed to be sunken by 2m in consideration of the cable and other issues. The transverse beam is once cast in the traditional construction process. The steel hoop + reverse hanging enclosure system is used as the bottom mold support system for the cast-in-place construction of the transverse beam. The bottom elevation of the enclosure system of the transverse beam sunken section is only +3.5m. Therefore, the construction process of the transverse beam sunken section is greatly affected by the tidal water, and needs to be constructed during the tide. The average continuous operation time of each tide is only 2.5h, and the daily work time is only 5h. The workable window period is short. SUMMARY

[0003] The present application aims at overcoming the defects of the prior art and providing a construction method of beam-slab type high-pile wharf superstructure, which can improve the construction efficiency of the wharf superstructure, has the characteristics of low cost and good forming effect, and effectively ensures the construction progress of the wharf project.

[0004] The present application is achieved in the following manner: a construction method of beam-slab type high-pile wharf superstructure, the superstructure including lower transverse beams installed on each wharf bent, berthing members installed on the front end face of the lower transverse beams, walkway plates bridging the top faces of two lower transverse beams at the front edges, a plurality of longitudinal beams bridging the top faces of two lower transverse beams at intervals, upper transverse beams located on the top faces of the lower transverse beams and connected to the end heads of the plurality of longitudinal beams, face plates provided on the top faces of the upper transverse beams and the plurality of longitudinal beams, and a surface layer covering the top faces of the face plates; each wharf bent is composed of five foundation piles or six foundation piles; the front edge bottom of the lower transverse beam extends downward and has a lower transverse beam sunken section with a rear end face being inclined.

[0005] The construction method is to divide the lower cross beam into a lower cross beam front section and a lower cross beam rear section, and to divide the upper cross beam into an upper cross beam front section and an upper cross beam rear section; the construction joint of the lower cross beam front section and the lower cross beam rear section is located at the top of the rear end face of the lower cross beam sinking section and extends backward by 1m, and the lower cross beam front section is located on the front two piles of each pier bent, and the lower cross beam rear section is located on the rear three piles or the rear four piles of each pier bent; the construction joint of the upper cross beam front section and the upper cross beam rear section is located at the construction joint of the lower cross beam and extends backward by 0.5m;

[0006] The construction method is performed according to the following steps: lower cross beam rear section surrounding wall system installation → lower cross beam sinking section surrounding wall system installation → berthing member installation → lower cross beam sinking section pouring → lower cross beam rear section pouring → walkway plate resting pier pouring → rear longitudinal beam installation → upper cross beam rear section pouring → walkway plate installation → lower cross beam front section pouring → front longitudinal beam installation → upper cross beam front section pouring → panel installation → surface layer pouring;

[0007] When the lower cross beam sinking section pouring step is performed, the step is performed at low tide, and the steel bar binding, the formwork installation and the concrete pouring of the lower cross beam sinking section are sequentially performed on the lower cross beam sinking section bottom formwork and the lower cross beam sinking section rear end face bottom formwork; when the steel bar binding of the lower cross beam sinking section is performed, the steel bars of the walkway plate resting pier, the steel bars of the lower cross beam front section and the steel bars of the upper cross beam front section are simultaneously bound; after the concrete is finally cured for twenty-four hours, the upper surface of the lower cross beam sinking section is chiseled;

[0008] When the lower cross beam rear section pouring step is performed, the steel bar binding, the formwork installation and the concrete pouring are sequentially performed on the lower cross beam rear section bottom formwork; when the steel bar binding is performed, the steel bars of the lower cross beam rear section and the steel bars of the upper cross beam rear section are simultaneously bound, and a section of the steel bars of the lower cross beam front section and a section of the steel bars of the upper cross beam front section are reserved; after the concrete is poured, the front end face of the lower cross beam rear section and the top face of the lower cross beam rear section are chiseled after the concrete is finally cured for twenty-four hours;

[0009] When the walkway plate resting pier pouring step is performed, the upper surface of the lower cross beam sinking section is first washed clean using fresh water, then surface wetting brushing treatment is performed using 50Mpa high-strength grouting material, and then the formwork installation and the concrete pouring are sequentially performed on the upper surface of the lower cross beam sinking section; after the concrete is finally cured for twenty-four hours, the upper surface and the rear end face of the walkway plate resting pier are chiseled;

[0010] When the rear longitudinal beam installation step is performed, the rear longitudinal beam installation is performed on the top face of the lower cross beam rear section using a crane ship when the concrete strength of the lower cross beam rear section reaches 80%;

[0011] When pouring the upper crossbeam rear section, install the formwork and pour the concrete on the top surface of the lower crossbeam rear section in sequence; after the concrete has set for 24 hours, roughen the front end of the upper crossbeam rear section.

[0012] The following procedures are included when pouring the front section of the lower crossbeam:

[0013] Step 1: First, use fresh water to clean the upper surface of the lower crossbeam sinking section, the front end of the lower crossbeam rear edge section, the upper surface of the walkway slab support platform, and the rear end of the walkway slab support platform. Then, use 50Mpa high-strength grouting material to wet and brush the surface.

[0014] Step 2: Remove rust from the steel bars reserved on the rear edge of the lower crossbeam: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened.

[0015] Step 3: Arrange the reinforcing mesh within a 20cm wide area of ​​the construction joint of the lower crossbeam;

[0016] Step 4: After the formwork is installed, pour concrete for the front edge section of the lower crossbeam. The concrete at the construction joint between the front edge section of the lower crossbeam and the front end of the rear edge section of the lower crossbeam should be vibrated to ensure that the concrete is dense.

[0017] Step 5: When the concrete strength of the leading edge section of the current beam reaches the design requirements, perform silane impregnation at the construction joint; spray the silane impregnating agent within a 20cm range on both sides of the construction joint; after the silane impregnation is completed, apply the anti-corrosion coating to the concrete surface.

[0018] When installing the front longitudinal beam, wait until the concrete strength of the front section of the lower crossbeam reaches 80%, then use a crane boat to install the front longitudinal beam on the top surface of the front section of the lower crossbeam.

[0019] The following procedures are included when pouring the front section of the upper crossbeam:

[0020] Step 1: First, use fresh water to rinse the upper surface of the front edge section of the lower crossbeam and the front end of the rear edge section of the upper crossbeam clean, and then use high-strength grout to wet and brush the surface.

[0021] Step 2: Remove rust from the steel bars reserved on the lower crossbeam's sunken section: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened.

[0022] Step 3: Arrange the reinforcing mesh within a 20cm wide area of ​​the construction joint of the upper beam;

[0023] Step 4: After the formwork is installed, pour concrete for the front edge section of the upper crossbeam. The concrete at the construction joint between the front edge section of the upper crossbeam and the front end of the rear edge section of the upper crossbeam should be vibrated to ensure that the concrete is dense.

[0024] Step 5: When the concrete strength of the front section of the upper beam reaches the design requirements, silane impregnation is carried out at the construction joint; the silane impregnating agent is sprayed on the concrete within a 20cm range on both sides of the construction joint; after the silane impregnation is completed, the anti-corrosion coating is applied to the concrete surface.

[0025] In the above-mentioned construction method for the superstructure of the beam-slab high-pile wharf, when installing the rear section of the lower crossbeam enclosure system, firstly, install the upper clamps of the rear section enclosure system of the lower crossbeam on each of the last three or four foundation piles of the wharf frame. Weld a pair of upper longitudinal support brackets on both sides of each upper clamp. Then, place an upper transverse load-bearing beam on each of the upper longitudinal support brackets on both sides of the foundation pile. Then, arrange multiple square timbers at equal intervals on the two upper transverse load-bearing beams as upper longitudinal distribution beams. Finally, lay plywood on the upper longitudinal distribution beams as the bottom formwork of the rear section of the lower crossbeam.

[0026] The construction method for the superstructure of the aforementioned beam-slab high-pile wharf, wherein the installation of the lower crossbeam sinking section cofferdam system is carried out at low tide and includes the following procedures:

[0027] Step 1: First, install the lower clamps of the lower crossbeam sinking section enclosure system on the first two foundation piles of the wharf frame. Weld a pair of lower longitudinal support brackets on both sides of each lower clamp. Then, place a lower transverse load-bearing beam on each of the lower longitudinal support brackets on both sides of the foundation pile. Install counter-pressure clamps on the third foundation pile of the wharf frame, which counter-pressure the rear ends of the two lower transverse load-bearing beams. Then, arrange multiple square timbers at equal intervals on the two lower transverse load-bearing beams as lower longitudinal distribution beams. Then, arrange multiple square timbers at equal intervals on the lower longitudinal distribution beams as transverse distribution beams. Finally, lay plywood on the transverse distribution beams as the bottom formwork of the lower crossbeam sinking section.

[0028] Step 2: First, install a right-angled triangular support frame at the rear of the bottom formwork of the lower crossbeam sinking section. Then, arrange multiple square timbers at equal intervals on the inclined surface of the support frame as longitudinal distribution beams on the inclined surface. Finally, lay plywood on the longitudinal distribution beams on the inclined surface as the bottom formwork of the rear end face of the lower crossbeam sinking section.

[0029] Step three: Install the anti-lifting system. First, fix a pair of transverse support brackets to the lower clamps on the first foundation pile of each wharf frame. Place a channel steel beam on each of these transverse support brackets as a longitudinal connecting beam connecting adjacent wharf frames. The top elevation of these two longitudinal connecting beams is the same as the top elevation of the pair of lower longitudinal support brackets, so that the two lower transverse load-bearing beams also rest on these two longitudinal connecting beams. Install a core cage on each of the first and second foundation piles of the wharf frame, and pour the core concrete using a water-based mixing vessel. The core cage of the first foundation pile is pre-filled with... A pair of transverse steel columns are embedded, with a double-channel steel bar resting on each column as a transverse steel spreader. A pair of longitudinal steel columns are pre-embedded in the core cage of the second foundation pile, with a double-channel steel bar resting on each column as a longitudinal steel spreader. The top elevations of both the transverse and longitudinal steel columns are higher than the top elevation of the lower crossbeam's sinking section. Each end of the transverse steel spreader is connected to one of the two longitudinal connecting beams via a finely rolled threaded steel bar as a hanger. Each end of the longitudinal steel spreader is also connected to one of the two lower transverse load-bearing beams via a finely rolled threaded steel bar as a hanger.

[0030] In the above-mentioned construction method for the superstructure of the beam-slab high-pile wharf, when pouring the lower crossbeam rear section, after the concrete strength reaches 80%, the retaining system of the lower crossbeam rear section and the retaining system of the lower crossbeam sinking section are removed.

[0031] The construction method for the superstructure of the beam-slab high-pile wharf of the present invention has the following characteristics: the lower crossbeam is poured in three stages, namely, the lower crossbeam sinking section, the lower crossbeam rear edge section, and the lower crossbeam front edge section are poured in sequence, and a longitudinal construction joint is set between the lower crossbeam rear edge section and the lower crossbeam front edge section; the upper crossbeam is poured in two stages, namely, the upper crossbeam rear edge section and the upper crossbeam front edge section are poured in sequence, and a longitudinal construction joint is set between the upper crossbeam rear edge section and the upper crossbeam front edge section; the lower crossbeam sinks during low tide. The pouring of the lower and upper crossbeam sections is unaffected by tides, resulting in high construction efficiency. This method solves the problems of long construction cycles, significant susceptibility to tides, and cumbersome procedures associated with traditional wharf superstructure construction. It not only ensures the construction progress and improves the construction efficiency of the wharf, but also provides special treatment for the longitudinal construction joints on both the lower and upper crossbeams, ensuring the overall stability of the superstructure. The construction method of this invention is characterized by high efficiency, low cost, and good forming effect. Attached Figure Description

[0032] Figure 1 This is a side view of the beam-slab high-pile wharf, which is the subject of the construction method for the superstructure of the beam-slab high-pile wharf of the present invention.

[0033] Figure 2 yes Figure 1 AA direction view;

[0034] Figure 3 This is a structural schematic diagram of the installation step of the lower crossbeam rear edge section enclosure system in the construction method of the present invention;

[0035] Figure 4 This is a structural schematic diagram of the installation step of the lower crossbeam sinking section enclosure system in the construction method of the present invention;

[0036] Figure 4a yes Figure 4 Top view;

[0037] Figure 5 This is a structural schematic diagram of the lower crossbeam sinking section pouring step in the construction method of the present invention;

[0038] Figure 6 This is a structural diagram of the construction method of the present invention during the pouring of the upper crossbeam rear section;

[0039] Figure 7 This is a structural diagram of the construction method of the present invention during the step of pouring concrete for the walkway slab support pier;

[0040] Figure 8 This is a structural schematic diagram of the longitudinal beam installation step along the rear edge in the construction method of the present invention;

[0041] Figure 9 This is a structural diagram of the construction method of the present invention during the pouring of the upper crossbeam rear section;

[0042] Figure 10 This is a structural schematic diagram of the construction method of the present invention during the pouring of the front section of the lower crossbeam;

[0043] Figure 11 This is a structural diagram of the longitudinal beam installation step in the construction method of the present invention;

[0044] Figure 12 This is a structural schematic diagram of the construction method of the present invention during the pouring of the front section of the upper crossbeam;

[0045] Figure 13 This is a structural diagram of the panel installation step in the construction method of the present invention;

[0046] Figure 14 This is a structural diagram of the surface layer pouring step in the construction method of the present invention. Detailed Implementation

[0047] The invention will now be further described with reference to the accompanying drawings.

[0048] Please see Figure 1 and Figure 2The construction method for the superstructure of the beam-slab type high-pile wharf of the present invention addresses a superstructure including a lower crossbeam 10 installed on each wharf frame 100, a mooring member 20 installed on the front end face of the lower crossbeam 10, a walkway slab spanning the front edge of the top of two lower crossbeams 10, several longitudinal beams 40 spaced apart and spanning the top surfaces of the two lower crossbeams 10, an upper crossbeam 50 located on the top surface of the lower crossbeams 10 and connected to the ends of the several longitudinal beams 40, and a structure provided on... The top surface of the upper crossbeam 50 and the top surface of several longitudinal beams 40 are panel 60 and surface layer 70 covering the top surface of panel 60; each wharf frame 100 is composed of six foundation piles; the length of the lower crossbeam 10 is 18-22m and the height is 1.6m; the bottom of the front edge of the lower crossbeam 10 extends downward to a lower crossbeam sunken section 13 with a height of 2m and a sloping rear end, and the length of the lower crossbeam sunken section 13 is 7.9m; the height of the upper crossbeam 50 is 1.9m.

[0049] The construction method of the beam-slab type high-pile wharf superstructure of the present invention is to divide the lower crossbeam 10 into a front section 11 and a rear section 12, and divide the upper crossbeam 50 into a front section 51 and a rear section 52. The construction joint 10A between the front section 11 and the rear section 12 of the lower crossbeam is located 1m behind the top of the rear end face of the lower crossbeam sinking section 13, and the front section 11 of the lower crossbeam is located on the first two foundation piles of each wharf frame 100, and the rear section 12 of the lower crossbeam is located on the last four foundation piles of each wharf frame 100. The construction joint 50A between the front section 51 and the rear section 52 of the upper crossbeam is located 0.5m behind the construction joint 10A of the lower crossbeam.

[0050] Please see again Figures 3 to 14 The construction method of the superstructure of the beam-slab high-pile wharf of the present invention is carried out according to the following steps: installation of the rear section of the lower crossbeam cofferdam system → installation of the lower crossbeam sunken section cofferdam system → installation of berthing components → pouring of the lower crossbeam sunken section → pouring of the rear section of the lower crossbeam → pouring of the walkway slab supporting pier → installation of the longitudinal beams at the rear edge → pouring of the rear section of the upper crossbeam → installation of the walkway slab → pouring of the front section of the lower crossbeam → installation of the longitudinal beams at the front edge → pouring of the front section of the upper crossbeam → panel installation (see...) Figure 13 → Surface layer pouring (see) Figure 14 );

[0051] When installing the lower crossbeam rear section enclosure system, first install the upper clamps 101 of the lower crossbeam rear section enclosure system on each of the last four foundation piles of the wharf frame 100. For each upper clamp 101, weld a pair of upper longitudinal support brackets to both sides of the foundation pile. Then, place a double-I-beam on each of the upper longitudinal support brackets on both sides of the foundation pile as an upper transverse load-bearing beam 102. The upper transverse load-bearing beams 102 are welded and reinforced to the upper longitudinal support brackets. Next, arrange multiple square timbers at equal intervals on the two upper transverse load-bearing beams 102 as upper longitudinal distribution beams 103. Finally, lay plywood on the upper longitudinal distribution beams 103 as the bottom formwork 104 of the lower crossbeam rear section (see...). Figure 3 );

[0052] The installation of the lower crossbeam sinking section enclosure system should be carried out during low tide and includes the following procedures:

[0053] Step 1: First, install the lower clamps 201 of the lower crossbeam sinking section enclosure system on the first two foundation piles of the wharf frame. Weld a pair of lower longitudinal support brackets on both sides of each lower clamp 201. Then, place a double-splitting I-beam on each of the lower longitudinal support brackets on both sides of the foundation pile as a lower transverse load-bearing beam 202. Weld the lower transverse load-bearing beam 202 to the lower support brackets for reinforcement. Install counter-pressure clamps 203 on the third foundation pile of the wharf frame, which counter-press against the rear ends of the two lower transverse load-bearing beams 202. Then, arrange multiple square timbers at equal intervals on the two lower transverse load-bearing beams 202 as lower longitudinal distribution beams 204. Then, arrange multiple square timbers at equal intervals on the lower longitudinal distribution beams 204 as transverse distribution beams 205. Finally, lay plywood on the transverse distribution beams 205 as the bottom formwork 206 of the lower crossbeam sinking section.

[0054] Step 2: First, install a right-angled triangular support frame 207 at the rear of the bottom formwork 206 of the lower crossbeam sinking section. Then, arrange multiple square timbers at equal intervals on the inclined surface of the support frame 207 as longitudinal distribution beams 208. Finally, lay plywood on the longitudinal distribution beams 208 as the bottom formwork 209 of the rear end face of the lower crossbeam sinking section.

[0055] Step three: Install the anti-lifting system. First, fix a pair of transverse support brackets 301 to the lower clamps 201 installed on the first foundation pile of each wharf frame. Place a channel steel beam 302 on each pair of transverse support brackets 301 as a longitudinal connecting beam 302 connecting adjacent wharf frames. The top elevation of these two longitudinal connecting beams 302 is the same as the top elevation of the pair of lower longitudinal support brackets, so that the two lower transverse load-bearing beams 202 also rest on the two longitudinal connecting beams 302. Then, install a pile core cage on each of the first and second foundation piles of the wharf frame, and pour the pile core concrete using a water-based mixing vessel. A pair of transverse steel columns 303 are pre-embedded in the pile core cage of the first foundation pile. A double-channel steel bar is placed on top of pile 303 as a transverse steel spreader 304; a pair of longitudinal steel columns 305 are pre-embedded in the pile core cage of the second foundation pile, and a double-channel steel bar is placed on top of the pair of longitudinal steel columns 305 as a longitudinal steel spreader 306; the top elevation of both the transverse steel column 303 and the longitudinal steel column 305 is higher than the top elevation of the lower crossbeam sinking section 13; each end of the transverse steel spreader 304 is connected to the two longitudinal connecting beams 302 by a 32mm diameter precision-rolled threaded steel bar as a hanger 307; each end of the longitudinal steel spreader 306 is also connected to the two lower transverse load-bearing beams 202 by a 32mm diameter precision-rolled threaded steel bar as a hanger 307 (see...). Figure 4 and Figure 4a );

[0056] When pouring the concrete for the lower crossbeam's sinking section, it should be done at low tide. The reinforcement binding, formwork installation, and concrete pouring for the lower crossbeam sinking section 13 should be carried out sequentially on the bottom formwork 206 and the rear end bottom formwork 209 of the lower crossbeam sinking section. While binding the reinforcement for the lower crossbeam sinking section 13, the reinforcement for the walkway slab support pier 30 should also be bound simultaneously. Twenty-four hours after the concrete has fully set, the upper surface of the lower crossbeam sinking section 13 should be roughened to a depth of 5mm–10mm (see [link to relevant documentation]). Figure 5 );

[0057] When pouring the lower crossbeam's rear edge section, the reinforcement binding, formwork installation, and concrete pouring are carried out sequentially on the bottom formwork 104 of the lower crossbeam's rear edge section. During reinforcement binding, the reinforcement bars of the lower crossbeam's rear edge section 12 and the upper crossbeam's rear edge section 52 are bound simultaneously, with a section of reinforcement bar reserved for the lower crossbeam's front edge section 11 and a section for the upper crossbeam's front edge section 51. After the concrete is poured, 24 hours after the concrete has set, the front end and top surfaces of the lower crossbeam's rear edge section 12 are roughened. Before roughening, control lines are marked at the boundaries, and a flat-headed roughening hammer is used to roughen the surface from the outside in along the control lines, with a roughening depth of [insert depth here]. The roughening depth should be controlled between 5mm and 10mm. The roughening should be light and meticulous, removing all surface laitance and loose layers and rinsing thoroughly. The roughened area should be greater than 90%, exposing about one-third of the fresh coarse aggregate. To prevent excessive impact from mechanical roughening and excessive depth, the roughening hammer should be held at a 30° angle to the structural surface. After the concrete strength reaches 80%, the retaining wall system along the lower crossbeam and the retaining wall system along the lower crossbeam's sinking section should be removed to facilitate the turnover of subsequent construction materials. Only a pair of transverse steel columns 303 on the first foundation pile and a pair of longitudinal steel columns 305 on the second foundation pile of each 100mm wharf frame should be left (see...). Figure 6 );

[0058] When pouring the concrete for the walkway slab support pier, first clean the upper surface of the lower crossbeam's sunken section with fresh water. Then, apply a 50MPa high-strength grout to the surface for wetting and brushing. Next, install the formwork and pour the concrete on the upper surface of the lower crossbeam's sunken section 13. After the concrete has set for 24 hours, roughen the upper surface and rear end face of the walkway slab support pier 30, controlling the roughening depth to 5mm-10mm (see...). Figure 7 );

[0059] When installing the rear longitudinal beams, once the concrete strength of the rear section 12 of the lower crossbeam reaches 80%, the three rear longitudinal beams 40 are installed on the top surface of the rear section 12 of the lower crossbeam using a crane vessel (see...). Figure 8 );

[0060] When pouring the upper crossbeam rear edge section, install the formwork and pour the concrete for the upper crossbeam rear edge section 52 sequentially on the top surface of the lower crossbeam rear edge section 12; after the concrete has set for 24 hours, roughen the front end face of the upper crossbeam rear edge section 52, controlling the roughening depth to 5mm-10mm (see...). Figure 9 );

[0061] The following procedures are included when pouring the front section of the lower crossbeam:

[0062] Step 1: First, use fresh water to clean the upper surface of the lower crossbeam sinking section 13, the front end of the lower crossbeam rear edge section 12, the upper surface of the walkway slab support pier 30, and the rear end of the walkway slab support pier 30. Then, use 50Mpa high-strength grout to wet and brush the surface to improve the concrete strength of the concrete bonding surface.

[0063] Step 2: Remove rust from the steel bars reserved on the rear edge section 12 of the lower crossbeam: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened; allow it to dry for 2-4 hours on the surface and 24 hours to fully dry, after which the original color of the steel bars will be exposed.

[0064] Step 3: Arrange the mesh reinforcement within a 20cm wide area of ​​the construction joint of the lower crossbeam in an inverted U-shape. The mesh reinforcement uses φ=6mm HPB300 steel bars with a mesh spacing of 50mm and a steel reinforcement protective layer thickness of 50mm. This ensures good concrete bonding and anchorage at the construction joint, evenly distributes the load at the concrete joint, and prevents cracking of the concrete surface.

[0065] Step 4: After the formwork is installed, pour concrete for the front edge section 11 of the lower crossbeam. The concrete at the construction joint 10A between the front edge section 11 of the lower crossbeam and the front end face of the rear edge section 12 of the lower crossbeam should be vibrated to ensure that the concrete is dense.

[0066] Step 5: When the concrete strength of the leading edge section 11 of the current crossbeam reaches the design requirements, perform silane impregnation at construction joint 10A. Spray the silane impregnating agent onto the concrete within a 20cm radius on both sides of the construction joint. Use a brush or roller for application, repeating the spray and keeping the surface moist until the substrate is completely penetrated. Each coat of silane should be 180–240 ml / m. 2 The time interval between two spray coats should be at least 4 hours; when applying the silane impregnating agent to the side of construction joint 10A, spray from bottom to top to ensure a vertical flow length of 15-20 cm; after the silane impregnation is completed, apply the anti-corrosion coating to the concrete surface (see...). Figure 10 );

[0067] When installing the leading longitudinal beams, once the concrete strength of the leading section 11 of the lower crossbeam reaches 80%, the two leading longitudinal beams 40 are installed on the top surface of the leading section 11 of the lower crossbeam using a crane vessel (see...). Figure 11 );

[0068] The following procedures are included when pouring the front section of the upper crossbeam:

[0069] Step 1: First, use fresh water to clean the upper surface of the front edge section 11 of the lower crossbeam and the front end face of the rear edge section 51 of the upper crossbeam. Then, use 50Mpa high-strength grout to wet and brush the surface to improve the concrete strength of the concrete bonding surface.

[0070] Step 2: Remove rust from the steel bars reserved on the lower crossbeam's sunken section 13: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened; allow it to dry for 2-4 hours on the surface and 24 hours to fully dry, after which the original color of the steel bars will be exposed.

[0071] Step 3: Arrange the mesh reinforcement within a 20cm wide area of ​​the construction joint of the upper crossbeam in an inverted U-shape. The mesh reinforcement uses φ=6mm HPB300 steel bars with a mesh spacing of 50mm and a concrete cover thickness of 50mm.

[0072] Step 4: After the formwork is installed, pour concrete for the front edge section 51 of the upper crossbeam. The concrete at the construction joint 50A between the front edge section 51 of the upper crossbeam and the front end face of the rear edge section 52 of the upper crossbeam should be vibrated to ensure that the concrete is dense.

[0073] Step 5: When the concrete strength of the leading edge section 51 of the upper crossbeam reaches the design requirements, perform silane impregnation at construction joint 50A. Spray the silane impregnating agent onto the concrete within a 20cm radius on both sides of construction joint 50A. Use a brush or roller for application, repeating the spraying and keeping the surface moist until the substrate is completely penetrated. The amount of silane sprayed per coat is 180–240 ml / m. 2 The time interval between two spray coats should be at least 4 hours; when applying the silane impregnating agent to the side of construction joint 50A, spray from bottom to top to ensure a vertical flow length of 15-20cm; after the silane impregnation is completed, apply the anti-corrosion coating to the concrete surface (see...). Figure 12 ).

[0074] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of the invention and should be defined by the claims.

Claims

1. A construction method for the superstructure of a beam-slab type high-pile wharf, the superstructure comprising: a lower crossbeam installed on each wharf frame; a berthing component installed on the front end face of the lower crossbeam; a walkway slab spanning the front edge of the top of two lower crossbeams; several longitudinal beams spaced apart and spanning the top surfaces of the two lower crossbeams; an upper crossbeam located on the top surface of the lower crossbeam and connected to the ends of the several longitudinal beams; a panel on the top surface of the upper crossbeam and the top surfaces of the several longitudinal beams; and a surface layer covering the top surface of the panel; each wharf frame is composed of six foundation piles; the lower crossbeam has a sunken section with a sloping rear end face extending downwards from the bottom of its front edge; characterized in that... The construction method involves dividing the lower crossbeam into a front section and a rear section, and dividing the upper crossbeam into a front section and a rear section. The construction joint between the front and rear sections of the lower crossbeam is located 1m behind the top of the rear end face of the lower crossbeam's sinking section. The front section of the lower crossbeam is located on the first two foundation piles of each wharf frame, and the rear section is located on the last four foundation piles of each wharf frame. The construction joint between the front and rear sections of the upper crossbeam is located 0.5m behind the construction joint between the front and rear sections of the lower crossbeam. The construction method is carried out in the following steps: installation of the rear section of the lower crossbeam enclosure system → installation of the lower crossbeam sunken section enclosure system → installation of the mooring components → pouring of the lower crossbeam sunken section → pouring of the rear section of the lower crossbeam → pouring of the walkway slab support platform → installation of the longitudinal beams at the rear edge → pouring of the rear section of the upper crossbeam → installation of the walkway slab → pouring of the front section of the lower crossbeam → installation of the longitudinal beams at the front edge → pouring of the front section of the upper crossbeam → panel installation → surface layer pouring. When pouring the lower crossbeam sinking section, it should be done at low tide. The reinforcement binding, formwork installation and concrete pouring of the lower crossbeam sinking section should be carried out sequentially on the bottom formwork of the lower crossbeam sinking section and the bottom formwork of the rear end of the lower crossbeam sinking section. When binding the reinforcement of the lower crossbeam sinking section, the reinforcement of the walkway slab support pier, the reinforcement of the front section of the lower crossbeam and the reinforcement of the front section of the upper crossbeam should be bound at the same time. After the concrete has set for 24 hours, the upper surface of the lower crossbeam sinking section should be roughened. When pouring the lower crossbeam rear section, the reinforcement binding, formwork installation and concrete pouring are carried out in sequence on the bottom formwork of the lower crossbeam rear section. When binding the reinforcement, the reinforcement of the lower crossbeam rear section and the upper crossbeam rear section should be bound at the same time, and a section of reinforcement for the lower crossbeam front section and a section of reinforcement for the upper crossbeam front section should be reserved. After the concrete is poured, after the concrete has set for 24 hours, the front end face and top face of the lower crossbeam rear section should be roughened. When pouring concrete for the walkway slab support pier, first use fresh water to clean the upper surface of the lower crossbeam's sunken section, then use 50MPa high-strength grout to wet and coat the surface, and then install the formwork and pour concrete on the upper surface of the lower crossbeam's sunken section in sequence; after the concrete has set for 24 hours, roughen the upper surface and rear end face of the walkway slab support pier. When installing the longitudinal beams at the rear edge, wait until the concrete strength of the rear edge section of the lower crossbeam reaches 80%, then use a crane boat to install the longitudinal beams at the rear edge on the top surface of the rear edge section of the lower crossbeam. When pouring the upper crossbeam rear section, install the formwork and pour the concrete on the top surface of the lower crossbeam rear section in sequence; after the concrete has set for 24 hours, roughen the front end of the upper crossbeam rear section. The following procedures are included when pouring the front section of the lower crossbeam: Step 1: First, use fresh water to clean the upper surface of the lower crossbeam sinking section, the front end of the lower crossbeam rear edge section, the upper surface of the walkway slab support platform, and the rear end of the walkway slab support platform. Then, use 50Mpa high-strength grouting material to wet and brush the surface. Step 2: Remove rust from the steel bars reserved on the rear edge of the lower crossbeam: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened. Step 3: Arrange the mesh reinforcement within a 20cm wide area of ​​the construction joint between the front edge of the lower crossbeam and the rear edge of the upper crossbeam. Step 4: After the formwork is installed, pour concrete for the front section of the lower crossbeam. The concrete at the construction joint between the front section and the rear section of the lower crossbeam should be vibrated to ensure that the concrete is dense. Step 5: When the concrete strength of the leading edge section of the current beam reaches the design requirements, perform silane impregnation at the construction joint; spray the silane impregnating agent within a 20cm range on both sides of the construction joint; after the silane impregnation is completed, apply the anti-corrosion coating to the concrete surface. When installing the front longitudinal beam, wait until the concrete strength of the front section of the lower crossbeam reaches 80%, then use a crane boat to install the front longitudinal beam on the top surface of the front section of the lower crossbeam. The following procedures are included when pouring the front section of the upper crossbeam: Step 1: First, use fresh water to rinse the upper surface of the front edge section of the lower crossbeam and the front end of the rear edge section of the upper crossbeam clean, and then use high-strength grout to wet and brush the surface. Step 2: Remove rust from the steel bars reserved on the lower crossbeam's sunken section: Put the steel bar rust remover into a sprayer and spray it directly onto the surface of the steel bars until the rust stains are thoroughly moistened. Step 3: Arrange the mesh reinforcement within a 20cm wide area of ​​the construction joint between the front and rear sections of the upper crossbeam. Step 4: After the formwork is installed, pour concrete for the front edge section of the upper crossbeam. The concrete at the construction joint between the front edge section and the rear edge section of the upper crossbeam should be vibrated to ensure that the concrete is dense. Step 5: When the concrete strength of the front section of the upper beam reaches the design requirements, silane impregnation is carried out at the construction joint; the silane impregnating agent is sprayed on the concrete within a 20cm range on both sides of the construction joint; after the silane impregnation is completed, the anti-corrosion coating is applied to the concrete surface.

2. The construction method for the superstructure of the beam-slab type high-pile wharf according to claim 1, characterized in that, When installing the lower crossbeam rear section enclosure system, first install the upper clamps of the lower crossbeam rear section enclosure system on each of the last four foundation piles of the wharf frame. Weld a pair of upper longitudinal support brackets on both sides of each upper clamp. Then, place an upper transverse load-bearing beam on each of the upper longitudinal support brackets on both sides of the foundation pile. Then, arrange multiple square timbers at equal intervals on the two upper transverse load-bearing beams as upper longitudinal distribution beams. Finally, lay plywood on the upper longitudinal distribution beams as the bottom formwork of the lower crossbeam rear section.

3. The construction method for the superstructure of the beam-slab type high-pile wharf according to claim 1, characterized in that, The installation of the lower crossbeam sinking section enclosure system should be carried out during low tide and includes the following procedures: Step 1: First, install the lower clamps of the lower crossbeam sinking section enclosure system on the first two foundation piles of the wharf frame. Weld a pair of lower longitudinal support brackets on both sides of each lower clamp. Then, place a lower transverse load-bearing beam on each of the lower longitudinal support brackets on both sides of the foundation pile. Install counter-pressure clamps on the third foundation pile of the wharf frame, which counter-pressure the rear ends of the two lower transverse load-bearing beams. Then, arrange multiple square timbers at equal intervals on the two lower transverse load-bearing beams as lower longitudinal distribution beams. Then, arrange multiple square timbers at equal intervals on the lower longitudinal distribution beams as transverse distribution beams. Finally, lay plywood on the transverse distribution beams as the bottom formwork of the lower crossbeam sinking section. Step 2: First, install a right-angled triangular support frame at the rear of the bottom formwork of the lower crossbeam sinking section. Then, arrange multiple square timbers at equal intervals on the inclined surface of the support frame as longitudinal distribution beams on the inclined surface. Finally, lay plywood on the longitudinal distribution beams on the inclined surface as the bottom formwork of the rear end face of the lower crossbeam sinking section. Step three: Install the anti-lifting system. First, fix a pair of transverse support brackets to the lower clamps on the first foundation pile of each wharf frame. Place a channel steel beam on each of the two transverse support brackets as a longitudinal connecting beam connecting adjacent wharf frames. The top elevation of the two longitudinal connecting beams is the same as the top elevation of the pair of lower longitudinal support brackets, so that the two lower transverse load-bearing beams also rest on the two longitudinal connecting beams. Install a core cage on each of the first and second foundation piles of the wharf frame, and pour the core concrete using a water-based mixing vessel. The core cage of the first foundation pile is pre-embedded with… A pair of transverse steel columns are supported by a double-channel steel bar serving as a transverse steel spreader. A pair of longitudinal steel columns are pre-embedded in the core cage of the second foundation pile, and a double-channel steel bar serving as a longitudinal steel spreader is supported on the longitudinal steel columns. The top elevations of both the transverse and longitudinal steel columns are higher than the top elevation of the lower crossbeam's sinking section. Each end of the transverse steel spreader is connected to two longitudinal connecting beams via a finely rolled threaded steel bar as a hanger. Each end of the longitudinal steel spreader is also connected to two lower transverse load-bearing beams via a finely rolled threaded steel bar as a hanger.

4. The construction method for the superstructure of the beam-slab type high-pile wharf according to claim 1, characterized in that, When pouring the lower crossbeam rear section, after the concrete strength reaches 80%, remove the rear section enclosure system of the lower crossbeam and the lower crossbeam sinking section enclosure system.

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