Construction method of cast-in-place slab pile wall

Abstract

The invention discloses a construction method of a cast-in-place plate pile wall, and belongs to the field of building construction. The construction method comprises the following steps: (1) carrying out support pile and cast-in-situ bored pile construction by adopting a rotary drilling rig; (2) after construction of the support piles is completed, top beam construction is conducted, and a plurality of concrete pouring inlets are formed in a top beam through PVC pipes; (3) breaking the pile body of the support pile to the surface of the reinforcing steel bar to expose three main reinforcing steel bars of the pile body, and planting the reinforcing steel bars on the pile body of the support pile; (4) steel bar binding and formwork installation of the sheet-pile wall plate are conducted, straight anchoring is conducted on the embedded steel bars of the pile body of the supporting pile and the steel bars of the sheet-pile wall plate, and the steel bars of the sheet-pile wall plate and the exposed steel bars of the supporting pile are welded; (5) carrying out plate pile wall plate pouring construction, and during pouring, carrying out concrete pouring through a concrete pouring inlet in the top beam; and (6) removing and maintaining the wallboard template of the sheet-pile wall. Construction is easy, the construction efficiency is high, and the appearance quality of the sheet-pile wall after concrete pouring can be greatly improved.

Description

Technical Field

[0001] The invention relates to a construction method of a cast-in-place sheet pile wall and belongs to the technical field of building construction. Background Art

[0002] Sheet pile wall is a composite structure combining piles and plates, which is mainly used to resist lateral soil pressure. Sheet pile wall construction is widely used in various projects such as water conservancy, highways, and municipal engineering. Through investigation, in the process of pouring concrete for sheet pile wall, "the concrete pouring method is too difficult" is the main factor for the poor appearance quality and unqualified appearance of sheet pile wall. During the construction of sheet pile wall, after the pile body construction of the supporting pile is completed, the crown beam construction is carried out, and then the sheet pile wall panel construction is carried out. Since the crown beam has been completed during the construction of the sheet pile wall panel, it is more difficult to pour the concrete of the sheet pile wall panel. In the prior art, the sheet pile wall concrete is generally poured in sections. This construction method is not only complicated in construction and difficult in concrete pouring, but also because of the use of sectioned pouring, the appearance quality of the sheet pile wall is poor, and the construction speed is slow and the construction efficiency is low, which affects the construction progress and construction quality. Summary of the invention

[0003] In view of the above-mentioned defects existing in the prior art, the present invention provides a construction method of a cast-in-place sheet pile wall which has simple construction, high construction efficiency and can improve the appearance quality of the sheet pile wall.

[0004] The present invention is realized by the following technical scheme: a construction method of a cast-in-place sheet pile wall, the cast-in-place sheet pile wall comprises a plurality of support piles arranged at intervals, a sheet pile wall panel arranged in front of the support piles and cast as one with the support piles, and a cap beam arranged at the upper end of the sheet pile wall, characterized by comprising the following steps:

[0005] (1) First, a rotary drilling rig is used to drill a hole for the pile foundation, and a steel cage is placed in the hole for the pile foundation. Concrete is poured into the pile body to the designed elevation to form a supporting pile;

[0006] (2) After the concrete of the supporting piles reaches the designed strength, the soil around the pile heads is excavated to the bottom of the crown beam, and the pile heads are manually broken and the pile head steel bars are straightened. Then, the crown beam steel bars are tied and the crown beam formwork is installed. A plurality of vertically arranged PVC pipes are fixedly arranged at intervals on the inner side of the crown beam formwork corresponding to the position of the sheet pile wall below. The PVC pipes penetrate the crown beam from top to bottom, and then the crown beam concrete is poured. After the pouring is completed, a concrete pouring inlet is formed at the PVC pipe;

[0007] (3) After the crown beam formwork is removed and maintained, the earthwork at the sheet pile wall is excavated to the designed bottom elevation, and then the pile body of the supporting pile is broken to the surface of the steel bar using an impact pick, so that the three main bars of the pile body are exposed, and the steel bars are planted on the pile body of the supporting pile;

[0008] (4) Tie the steel bars of the sheet pile wall and install the formwork, directly anchor the embedded steel bars of the supporting piles to the steel bars of the sheet pile wall, and weld the steel bars of the sheet pile wall to the exposed steel bars after the supporting piles are broken;

[0009] (5) Casting of sheet pile wall panels, during which concrete is poured through the concrete pouring inlet on the crown beam;

[0010] (6) Removal and maintenance of sheet pile wall panel formwork.

[0011] Furthermore, in order to ensure the connection between the sheet pile wall panels and the supporting piles, the embedding depth of the supporting piles is 300 mm.

[0012] Furthermore, the diameter of the concrete pouring inlet is 200 mm.

[0013] Furthermore, the concrete pouring inlets are evenly spaced along the length direction of the sheet pile wall panel.

[0014] The beneficial effects of the present invention are as follows: the construction process of the present invention is simple, and by reserving a concrete pouring inlet during the construction of the crown beam, the concrete pouring construction of the sheet pile wall panel can be carried out conveniently and quickly. The construction is simple and easy to operate, which can reduce the difficulty of concrete pouring construction, and can make the template support and pouring process simpler, which can greatly improve the construction efficiency. The construction method of the present invention can greatly improve the appearance and quality of the sheet pile wall concrete after pouring, and meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the sheet pile wall in the present invention;

[0016] Figure 2 is a cross-sectional schematic diagram of a sheet pile wall in the present invention;

[0017] In the figure, 1. sheet pile wall panel, 2. cap beam, 3. concrete pouring inlet, 4. supporting piles, 5. embedded reinforcement, 6. building exterior wall. DETAILED DESCRIPTION

[0018] The present invention will be further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0019] As shown in the attached drawings, a construction method of a cast-in-place sheet pile wall, the cast-in-place sheet pile wall comprises a plurality of support piles 4 arranged at intervals, a sheet pile wall panel 1 arranged in front of the support piles 4 and cast as one with the support piles 4, and a cap beam 2 arranged at the upper end of the sheet pile wall. Among them, the sheet pile wall panel 1 is a reinforced concrete structure with a thickness of 200mm; the cap beam 2 is a reinforced concrete structure with a size of 1000*600; the support piles 4 are reinforced concrete support piles with a diameter of 800mm;

[0020] It includes the following steps:

[0021] (1) After the positioning and laying out of the supporting piles are completed, a rotary drilling rig is used to drill holes for the pile foundation, and then a steel cage is placed in the pile foundation hole, and concrete is poured into the pile body to the designed elevation to form supporting piles 4;

[0022] (2) After the concrete of the supporting pile reaches the designed strength, the earth around the pile head of the supporting pile is excavated to the bottom of the crown beam, the pile head is manually broken and the garbage is cleaned, and the pile head steel bars are straightened, and then the crown beam steel bars are tied. After the crown beam steel bars are tied, the crown beam template is installed and reinforced, and a plurality of vertically arranged PVC pipes are fixedly arranged at intervals on the inner side of the crown beam template corresponding to the position of the sheet pile wall panel 1 below. The PVC pipe runs through the crown beam from top to bottom, and then the crown beam concrete is poured. After the crown beam concrete is poured, a concrete injection inlet 3 is formed at the PVC pipe; the PVC pipe preferably has a diameter of 200 mm. To ensure concrete pouring, the concrete injection inlet 3 is preferably evenly spaced along the length direction of the sheet pile wall panel 1.

[0023] (3) After the crown beam formwork is removed and maintained, the earthwork at the sheet pile wall is excavated to the designed bottom elevation, and then the pile body of each supporting pile 4 is broken to the surface of the steel bar using an impact pick, so that the three main bars of the pile body are exposed, and the steel bar 5 is planted on the pile body of each supporting pile 4. The planting depth of the steel bar 5 is 300 mm, and the number of steel bars 5 is determined according to the design. The diameter of the steel bar 5 is φ14 mm.

[0024] (4) tying the steel bars of the sheet pile wall panel 1, directly anchoring the embedded bars 5 of the supporting pile body with the steel bars of the sheet pile wall panel, welding the steel bars of the sheet pile wall panel with the exposed steel bars after the supporting piles are broken, and then installing and reinforcing the formwork of the sheet pile wall panel 1;

[0025] (5) After the formwork reinforcement of the sheet pile wall panel 1 is completed, the sheet pile wall panel casting construction is carried out, and during the casting, concrete is poured through the concrete pouring inlet 3 on the crown beam;

[0026] (6) Removal and maintenance of sheet pile wall panel formwork.

[0027] During construction, the concrete pouring and vibration process should be strictly controlled to prevent the occurrence of mold running, slurry leakage and honeycomb surface of concrete during concrete pouring; the curing of concrete should also be strengthened to prevent shrinkage cracks in concrete, and the demolding time should be strictly controlled to avoid damage, deformation and cracking of the concrete structure, thereby affecting the overall appearance quality of the sheet pile wall. After the sheet pile wall is cast and formed, the finished product should be well protected to keep the wall clean and tidy without causing pollution.

[0028] The present invention arranges a concrete pouring inlet on the crown beam, through which the concrete pouring of the sheet pile wall panel can be conveniently carried out, the construction is simple, easy to operate, and the construction efficiency is high. Through this construction method, the appearance quality of the sheet pile wall after the concrete pouring is completed can be greatly improved.

[0029] The other parts of this embodiment are all prior art and will not be described in detail here.

Claims

1. A construction method for a cast-in-place sheet pile wall, the cast-in-place sheet pile wall comprising a plurality of support piles arranged at intervals, a sheet pile wall panel arranged in front of the support piles and cast as one with the support piles, and a cap beam arranged at the upper end of the sheet pile wall, wherein: The steps include: (1) First, a rotary drilling rig is used to drill a hole for the pile foundation, and a steel cage is placed in the hole for the pile foundation. Concrete is poured into the pile body to the designed elevation to form a supporting pile; (2) After the concrete of the supporting piles reaches the designed strength, the soil around the pile heads is excavated to the bottom of the crown beam, and the pile heads are manually broken and the pile head steel bars are straightened. Then, the crown beam steel bars are tied and the crown beam formwork is installed. A plurality of vertically arranged PVC pipes are fixedly arranged at intervals on the inner side of the crown beam formwork corresponding to the position of the sheet pile wall below. The PVC pipes penetrate the crown beam from top to bottom, and then the crown beam concrete is poured. After the pouring is completed, a concrete pouring inlet is formed at the PVC pipe; (3) After the crown beam formwork is removed and maintained, the earthwork at the sheet pile wall is excavated to the designed bottom elevation, and then the pile body of the supporting pile is broken to the surface of the steel bar using an impact pick, so that the three main bars of the pile body are exposed, and the steel bars are planted on the pile body of the supporting pile; (4) Tie the steel bars of the sheet pile wall and install the formwork, directly anchor the embedded steel bars of the supporting piles to the steel bars of the sheet pile wall, and weld the steel bars of the sheet pile wall to the exposed steel bars after the supporting piles are broken; (5) Casting of sheet pile wall panels, during which concrete is poured through the concrete pouring inlet on the crown beam; (6) Removal and maintenance of sheet pile wall panel formwork.

2. The construction method of cast-in-place sheet pile wall according to claim 1, characterized in that: The embedding depth of the reinforcement bars in the supporting pile is 300mm.

3. The construction method of cast-in-place sheet pile wall according to claim 1 or 2, characterized in that: The diameter of the concrete pouring inlet is 200mm.

4. The construction method of cast-in-place sheet pile wall according to claim 3 is characterized in that: The concrete pouring inlets are evenly spaced along the length direction of the sheet pile wall panel.

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