Beam-pile combined load conduction construction method

Abstract

The invention relates to a beam-pile combined load conduction construction method. The method comprises the following steps that the surrounding environment of a foundation pit is analyzed; determining a construction scheme; construction preparation; cast-in-situ bored pile hole positions are measured, and the cast-in-situ bored piles are located on the two sides of the original concrete foundation; the cast-in-situ bored pile is constructed; breaking the pile head; constructing a top beam, a bearing platform beam and a newly-built concrete foundation, anchoring a pile top reinforcing steel bar into the top beam and the bearing platform beam, binding and connecting the pile top reinforcing steel bar between the bearing platform beam and a reinforcing cage of the newly-built concrete foundation by using a connecting rib, erecting a template, pouring concrete, connecting the top beam between two adjacent cast-in-situ bored pile heads on the same side, and constructing the cast-in-situ bored pile. The bearing platform beams are connected between the pile heads of the two cast-in-situ bored piles which are located on the different sides and oppositely arranged. On the premise that an original concrete foundation exists and bearing pile construction is not met, cast-in-situ bored piles are constructed on the two sides of the original concrete foundation, the cast-in-situ bored piles and the newly-built concrete foundation are connected together through a top beam and a bearing platform beam, and self-weight loads and soil pressure are well conducted.

Description

Technical Field

[0001] The invention relates to the field of foundation engineering construction technology, and in particular to a beam-pile combined load conduction construction method. Background Art

[0002] In recent years, the steel industry has developed rapidly, the sintering equipment is old, the output economic benefits are low, the desulfurization and denitrification emission concentrations do not meet the standards, and other environmental protection and economic development issues have become prominent. It is urgent to transform the original sintering machines.

[0003] For new sintering projects, there are many production line equipment, complex equipment foundation, large investment and long construction period, so reusing the original sintering machine foundation is a better choice. During the transformation, there may be a situation where the new and old foundations affect each other due to their positions, and the bearing capacity of the on-site foundation does not meet the requirements of the new foundation, which brings safety hazards to the original foundation and increases the difficulty of new foundation construction.

[0004] Generally speaking, the foundation treatment methods include replacing the cushion layer, compaction, increasing the base area and piling, etc. However, when the new foundation is located on the original foundation and the original foundation cannot support the new foundation, the above methods cannot be directly applied. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a beam-pile combined load transfer construction method.

[0006] The beam-pile combined load transmission construction method provided by the present invention adopts the following technical scheme: A beam-pile combined load transmission construction method comprises the following steps: S1. Analyze the surrounding environment of the foundation pit, including: collect data from the construction site and process and analyze it; S2. Determine the construction plan, including: formulate a specific and feasible construction plan based on the construction site data and submit it for approval; S3. Prepare for construction, reasonably allocate and mobilize personnel, materials and machinery, and arrange the construction site to meet normal construction conditions; S4. Measure and place the bored pile hole position, including: use professional measuring instruments to accurately locate the bored pile hole position according to the design drawings, and the bored piles are located on both sides of the original concrete foundation; S5. Bored pile construction, including: In summary: the bored piles are constructed using the commonly used mud wall bored pile construction technology in the industry; S6, breaking the pile head, using tools to crush the pile head of the bored pile to expose the steel bars at the top of the pile; S7, construction of the crown beam, the pedestal beam, and the new concrete foundation, specifically including: anchoring the pile top steel bars into the crown beam and the pedestal beam, using connecting bars to tie and connect the pedestal beam and the steel cage of the new concrete foundation, setting up the formwork in different processes, pouring concrete, the crown beam is connected between the pile heads of two adjacent bored piles on the same side, and the pedestal beam is connected between the pile heads of two bored piles on different sides and opposite to each other.

[0007] By adopting the above technical scheme, the present invention constructs bored cast-in-place piles on both sides of the original concrete foundation under the premise that the original concrete foundation exists, the conditions for bearing pile construction are not met and the bearing capacity of the foundation still needs to be improved, and the bored cast-in-place piles and the newly built concrete foundation are connected together by the cap beam and the pedestal beam, so as to effectively transmit the self-weight load and soil pressure.

[0008] Optionally, three bored piles are provided on each side of the original concrete foundation.

[0009] Optionally, the bored pile has a diameter of 0.8m, uses C30 concrete, a protective layer thickness of 50mm, a pile spacing of 1.4m, a pile length of 16m, an embedding depth of 8m, pile reinforcement: HRB400, 10@Φ25mm, spiral reinforcement: HRB400, Φ8@200mm, and reinforcing bars 6@800.

[0010] Optional, the crown beam is 0.8m high and 1m wide, the stress reinforcement is HRB400, 10Φ25mm, the additional reinforcement is HRB400, 6Φ20mm, the stirrups are HPB300, Φ8@200mm, C25 concrete is used, and the protective layer thickness is 40mm.

[0011] Optionally, the pedestal beam is 0.8m high and 0.55m wide, with stress reinforcement: HRB400, 12Φ25mm, torsion reinforcement: HRB400, 3Φ16mm, stirrups: HPB300, Φ10@150mm, C25 concrete and protective layer thickness of 40mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a flow chart of the beam-pile combined load transmission construction method according to an embodiment of the present invention.

[0013] Figure 2 It is a plan view of beam and column arrangement according to an embodiment of the present invention.

[0014] Figure 3 yes Figure 2 Sectional view along AA direction.

[0015] Explanation of the accompanying reference numerals: 1. Original concrete foundation; 2. Bored cast-in-place piles; 3. Crown beam; 4. Cap beam; 5. Connecting reinforcement; 6. New concrete foundation. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 -Attached Figure 3 The present invention is described in further detail.

[0017] The embodiment of the present invention discloses a beam-pile combined load transmission construction method. Figure 1-Figure 3 , the beam-pile combined load transmission construction method comprises the following steps: S1. Analyze the surrounding environment of the foundation pit, including: collecting data from the construction site and conducting data processing and analysis.

[0018] S2. Determine the construction plan, which includes: formulating a specific and feasible construction plan based on the construction site data and submitting it for approval.

[0019] S3. Construction preparation, specifically including: reasonable allocation and mobilization of personnel, materials and machinery, and layout of the construction site to meet normal construction conditions.

[0020] S4, measuring and placing the positions of bored cast-in-place piles 2, specifically comprising: accurately positioning the positions of the bored cast-in-place piles 2 according to the design drawings using professional measuring instruments, the bored cast-in-place piles 2 being located on both sides of the original concrete foundation 1; in this embodiment, taking the original concrete corridor as an example, three bored cast-in-place piles 2 are arranged on each side of the original concrete corridor.

[0021] S5, construction of bored cast-in-place piles 2, specifically including: adopting the mud wall-protected bored cast-in-place pile construction process commonly used in the industry to construct the bored cast-in-place piles 2; in this embodiment, the bored cast-in-place piles 2 have a diameter of 0.8m, adopt C30 concrete, a protective layer thickness of 50mm, a pile spacing of 1.4m, a pile length of 16m, an embedding depth of 8m, pile reinforcement: HRB400, 10@Φ25mm, spiral reinforcement: HRB400, Φ8@200mm, and reinforcing ribs 6@800.

[0022] S6, breaking the pile head, specifically comprising: using a pneumatic pick or other tools to break the pile head of the bored pile 2 to expose the steel bars at the pile top.

[0023] S7, the construction of the crown beam 3, the pedestal beam 4 and the newly built concrete foundation 6 specifically includes: anchoring the pile top reinforcement into the crown beam 3 and the pedestal beam 4, using Φ12 connecting bars 5 to tie and connect between the pedestal beam 4 and the reinforcement cage of the newly built concrete foundation 6, setting up the formwork in stages, and pouring concrete; wherein the crown beam 3 is connected between the pile heads of two adjacent bored cast-in-place piles 2 located on the same side, and the pedestal beam 4 is connected between the pile heads of two bored cast-in-place piles 2 located on different sides and arranged opposite to each other.

[0024] Crown beam 3 is 0.8m high and 1m wide. The stress-bearing steel bars are: HRB400, 10Φ25mm, additional steel bars are: HRB400, 6Φ20mm, stirrups are: HPB300, Φ8@200mm, C25 concrete is used, and the protective layer thickness is 40mm; pedestal beam 4 is 0.8m high and 0.55m wide. The stress-bearing steel bars are: HRB400, 12Φ25mm, torsion steel bars are: HRB400, 3Φ16mm, stirrups are: HPB300, Φ10@150mm, C25 concrete is used, and the protective layer thickness is 40mm.

[0025] The implementation principle of the beam-pile combined load transmission construction method of the embodiment of the present invention is: the load of the newly built concrete foundation 6 is transmitted to the foundation through the cap beam 4, the cap beam 3 and the bored pile 2, forming a beam-pile combined load transmission system. Under the premise that the existing concrete foundation 1 does not meet the construction conditions of the bearing piles and the bearing capacity of the foundation still needs to be improved, the present invention constructs bored piles 2 on both sides of the original concrete foundation 1, and connects the bored piles 2 and the newly built concrete foundation 6 together through the cap beam 3 and the cap beam 4, so as to transmit the deadweight load and soil pressure well.

[0026] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A beam-pile combined load transmission construction method, characterized in that: The following steps are involved: S1. Analyze the surrounding environment of the foundation pit, including: collecting construction site data and processing and analyzing it; S2. Determine the construction plan, including: formulate a specific and feasible construction plan based on the construction site data and submit it for approval; S3. Construction preparation, reasonable allocation and mobilization of personnel, materials and machinery, and layout of the construction site to meet normal construction conditions; S4, measuring and placing the hole positions of bored cast-in-place piles (2), specifically comprising: accurately positioning the hole positions of bored cast-in-place piles (2) using professional measuring instruments according to the design drawings, wherein the bored cast-in-place piles (2) are located on both sides of the original concrete foundation (1); S5, construction of bored cast-in-place piles (2), specifically comprising: using a commonly used mud wall-protected hole-forming cast-in-place pile construction process in the industry to construct the bored cast-in-place piles (2); S6, breaking the pile head, using a tool to break the pile head of the bored pile (2) to expose the steel bars at the top of the pile; S7, construction of the crown beam (3), the pedestal beam (4), and the newly built concrete foundation (6), specifically includes: anchoring the pile top reinforcement into the crown beam (3) and the pedestal beam (4), using connecting bars (5) to tie and connect between the pedestal beam (4) and the reinforcement cage of the newly built concrete foundation (6), setting up the formwork in stages, pouring concrete, connecting the crown beam (3) between the pile heads of two adjacent bored cast-in-place piles (2) located on the same side, and connecting the pedestal beam (4) between the pile heads of two bored cast-in-place piles (2) located on different sides and arranged opposite to each other.

2. The beam-pile combined load transmission construction method according to claim 1 is characterized in that: Three bored cast-in-place piles (2) are arranged on both sides of the original concrete foundation (1).

3. The beam-pile combined load transmission construction method according to claim 1 is characterized in that: The bored pile (2) has a diameter of 0.8m, uses C30 concrete, a protective layer thickness of 50mm, a pile spacing of 1.4m, a pile length of 16m, an embedding depth of 8m, pile reinforcement: HRB400, 10@Φ25mm, spiral reinforcement: HRB400, Φ8@200mm, and reinforcing bar 6@800.

4. The beam-pile combined load transmission construction method according to claim 1 is characterized in that: The crown beam (3) is 0.8m high and 1m wide. The load-bearing steel bars are HRB400, 10Φ25mm, the additional steel bars are HRB400, 6Φ20mm, the stirrups are HPB300, Φ8@200mm, and C25 concrete is used with a protective layer thickness of 40mm.

5. The beam-pile combined load transmission construction method according to claim 1 is characterized in that: The cap beam (4) is 0.8m high and 0.55m wide. The stress reinforcement is HRB400, 12Φ25mm, the torsion reinforcement is HRB400, 3Φ16mm, the stirrups are HPB300, Φ10@150mm, and C25 concrete is used. The protective layer thickness is 40mm.

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