A method for bridge pile foundation construction

Abstract

This invention relates to the field of bridge engineering technology, specifically to a bridge pile foundation construction method. By utilizing culverts to drain river water and constructing earthen embankments to provide a construction site for bridge pile foundation construction, a large amount of earthwork can be effectively reduced. Furthermore, this method has a simple construction process and does not require additional temporary land acquisition to build access roads or bridges, thus effectively reducing construction costs.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a method for constructing bridge pile foundations. Background Technology

[0002] In the process of urbanization, many small and medium-sized bridges need to be built. In the construction of bridge foundations, when the bridge piers and abutments are below the surface water level, most of the current methods for the construction of pile foundations for small and medium-sized bridges are to change or fill the river channel. However, this method requires additional temporary land acquisition to change the river channel or cut off the river, which is uneconomical and difficult to construct. A few use steel sheet pile cofferdams, but this method is difficult to construct and costly. These are all things that those skilled in the art do not want to see. Summary of the Invention

[0003] In view of the above-mentioned defects in the existing technology, the present invention provides a bridge pile foundation construction method, comprising the following steps:

[0004] Step S1: Mark the bridge design pile positions in the river channel according to the design drawings;

[0005] Step S2: Determine the location and number of rows of culverts to be installed based on the released bridge design pile positions, and set the river channel in the construction area including a first side and a second side opposite to the first side, and set the side of the river channel where the culverts to be installed as the first side;

[0006] Step S3: A first blockage is installed on the water-facing side of the first side of the river channel to form a diversion channel on the second side of the river channel;

[0007] Step S4: Install the water passage culvert and place second sealing objects on both sides of the water passage culvert to limit its movement.

[0008] Step S5: According to the on-site pile foundation construction progress requirements, check the historical highest water level of the river during the pile foundation construction period, and obtain the embankment filling elevation based on the historical highest water level.

[0009] Step S6: Backfill soil on both sides of the culvert to the embankment filling elevation to form an embankment;

[0010] Step S7: Remove the first blockage located on the upstream side of the river channel;

[0011] Step S8: Backfill the diversion channel;

[0012] Step S9: Mark the construction positions of the bridge design piles on the top of the earthen embankment, and carry out the subsequent pile foundation construction process according to the construction positions.

[0013] Preferably, step S1 specifically comprises:

[0014] Based on the planar coordinates of the bridge design pile locations in the design drawings, the bridge design pile locations are measured in the river channel and marked on the water.

[0015] Preferably, in step S2:

[0016] Based on the released bridge design pile positions, calculate the location and number of culverts to be installed in the area along the transverse direction of the bridge and more than 2m away from the outer edge of the released bridge design pile positions.

[0017] Preferably, both the first and second sealing materials are soil bags.

[0018] Preferably, in step S4, the water passage culvert is composed of multiple water passage culvert sections;

[0019] Multiple sections of the aforementioned water-passing culvert are installed sequentially from upstream to downstream of the river channel, and rubber waterstop rings are installed between adjacent water-passing culvert sections.

[0020] Preferably, the elevation of the excavated embankment is greater than the historical highest water level.

[0021] Preferably, the difference between the embankment filling elevation and the historical highest water level is 0.4 to 0.6 m.

[0022] Preferably, in step S6, the soil is backfilled symmetrically in layers on both sides of the culvert to the embankment filling elevation to form an embankment.

[0023] Preferably, step S8 specifically comprises:

[0024] The diversion channel was backfilled, and the backfilling process was carried out in layers with compaction until the backfill elevation was level with the top of the earthen embankment.

[0025] Preferably, in step S9:

[0026] Using a total station, the construction positions of the bridge design piles are marked on the top of the earthen embankment.

[0027] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0028] The present invention provides a bridge pile foundation construction method that utilizes culverts to drain river water and constructs earthen embankments to provide a construction site for bridge pile foundation construction. This method can effectively reduce a large amount of earthwork, and the construction process is simple. It does not require additional temporary land acquisition to build access roads or bridges, which can effectively reduce construction costs. Attached Figure Description

[0029] Figure 1 This is a flowchart of the bridge pile foundation construction method in an embodiment of the present invention;

[0030] Figure 2 This is a structural schematic diagram of bridge pile foundation construction in an embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of the bridge pile foundation construction in an embodiment of the present invention;

[0032] Figure 4 This is a top view of the bridge pile foundation construction in an embodiment of the present invention;

[0033] Wherein: 1 is the river channel, 2 is the culvert, 3 is the soil bag, 4 is the bridge design pile location, 5 is the earthen embankment, and 6 is the diversion channel. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1-4 As shown, this invention discloses a bridge pile foundation construction method, applicable to bridge pile foundation construction in rivers with a width of less than 30 meters and a water depth of less than 3 meters. It effectively solves the problems of uneconomical and difficult construction, such as the need for land acquisition, river channel alteration, or river closure, when constructing bridge pile foundations in small to medium-sized rivers. This method has low construction difficulty, does not require temporary land acquisition, and is economical and practical. Specifically, the construction method includes the following steps:

[0036] Step S1: According to the design drawings, mark the bridge design pile position 4 in the river channel 1. Specifically, the surveyor measures the bridge design pile position 4 in the river channel 1 (for example, the river channel 1 is 12m wide and the water depth is 1m) according to the plane coordinates of the bridge design pile position 4 in the design drawings, and marks it on the water.

[0037] Step S2: Determine the location and number of rows of the water-passing culvert 2 (which is a concrete water-passing culvert 2) to be installed based on the released bridge design pile position 4, and set up the river channel 1 located in the construction area, including a first side and a second side opposite to the first side, and set the side of the river channel 1 where the water-passing culvert 2 is to be installed as the first side.

[0038] Specifically, based on the released bridge design pile position 4, the surveyors calculate the location and number of rows of the water culverts to be installed in an area along the transverse direction of the bridge and more than 2m away from the outer edge of the released bridge design pile position 4, so as to ensure that the location of the water culverts to be installed is in a position that does not affect the pile foundation construction.

[0039] Step S3: Set up soil bags 3 on the water-facing side of the first side of the river channel 1 to form a diversion channel 6 on the second side of the river channel 1.

[0040] Specifically, based on the calculated construction location that will not affect the bridge design pile position 4, soil bags 3 and a cofferdam for filling soil bags 3 are set up on the upstream water-facing side of the first side of the river channel 1 to form a diversion channel 6 on the second side of the river channel 1 to divert the river water.

[0041] Step S4: Install the water culvert 2 according to the location and number of rows of the water culvert 2 to be installed as determined in step S2, and place soil bags 3 on both sides of the water culvert 2 to limit its movement.

[0042] Preferably, in step S4, the aforementioned culvert 2 is composed of multiple culvert sections; wherein, multiple culvert sections are installed sequentially from upstream to downstream of the river channel 1, and rubber waterstop rings are installed between adjacent culvert sections.

[0043] Specifically, after the river channel 1 is diverted, precast concrete culverts 2 will be laid in one or more rows along the transverse side of the bridge, at least 2 meters away from the outer edge of the designed pile position 4, without affecting the construction location of the designed pile position 4. The inner diameter of the culvert 2 is 1m, the outer diameter is 1.2m, and the length of a single culvert is 2.5m. During the laying process, the culvert sections will be installed sequentially from upstream to downstream of the river channel 1. To prevent leakage of the laid culvert 2, water-swellable rubber waterstops will be installed at the connection points of each culvert section to achieve the effect of no leakage at the connection points of the culvert 2.

[0044] Specifically, after laying the first section of the water pipe culvert, soil bags 3 are placed on both sides of the first section of the water pipe culvert to fix it. Then the second section of the water pipe culvert is installed and fixed. That is, after each section of the water pipe culvert is installed, soil bags 3 are placed symmetrically on both sides of the section to fix the water pipe culvert 2.

[0045] Step S5: According to the on-site pile foundation construction progress requirements, check the historical highest water level of river channel 1 during the pile foundation construction period, and obtain the embankment filling elevation based on the historical highest water level.

[0046] Specifically, check the local hydrogeological information, check the historical highest water level of the river channel 1 during the planned pile foundation construction period, and calculate the filling elevation of the earthen embankment 5 by adding 0.5m to the highest water level.

[0047] Step S6: Backfill soil in layers on both sides of the culvert 2 to the filling elevation of the embankment 5 to form the embankment 5, so as to create a working surface for the pile driver; specifically, after the soil bags 3 are placed, backfill soil on both sides of the culvert 2. Backfilling should be symmetrical and layered, and compacted in layers to prevent excessive pressure on the sides of the culvert 2 from causing displacement and leakage.

[0048] Step S7: Remove the soil bag 3 located on the upstream side of the river to divert the river water to the culvert 2, through which the river water flows downstream.

[0049] Step S8: Backfill the diversion channel 6, and compact it in layers during the backfilling process, and backfill the diversion channel 6 in layers until the backfill elevation is level with the top of the earthen embankment 5.

[0050] In step S9, the surveyors use a total station to mark the construction location of the bridge design pile position 4 on the top of the earthen embankment 5, and then carry out the subsequent pile foundation construction process according to the construction location.

[0051] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for constructing bridge pile foundations, characterized in that, Includes the following steps: Step S1: Mark the bridge design pile positions in the river channel according to the design drawings; Step S2: Determine the location and number of rows of culverts to be installed based on the released bridge design pile positions, and set the river channel in the construction area including a first side and a second side opposite to the first side, and set the side of the river channel where the culverts to be installed as the first side; Step S3: A first blockage is installed on the water-facing side of the first side of the river channel to form a diversion channel on the second side of the river channel; Step S4: Install the water passage culvert and place second sealing objects on both sides of the water passage culvert to limit its movement. Step S5: According to the on-site pile foundation construction progress requirements, check the historical highest water level of the river during the pile foundation construction period, and obtain the embankment filling elevation based on the historical highest water level. Step S6: Backfill soil on both sides of the culvert to the embankment filling elevation to form an embankment; Step S7: Remove the first blockage located on the upstream side of the river channel; Step S8: Backfill the diversion channel; Step S9: Mark the construction positions of the bridge design piles on the top of the earthen embankment, and carry out the subsequent pile foundation construction process according to the construction positions.

2. The bridge pile foundation construction method as described in claim 1, characterized in that, The specific steps of step S1 are as follows: based on the planar coordinates of the bridge design pile positions in the design drawings, the bridge design pile positions are measured in the river channel and marked on the water.

3. The bridge pile foundation construction method as described in claim 1, characterized in that, In step S2: Based on the released bridge design pile positions, calculate the location and number of rows of water culverts to be installed in an area along the transverse direction of the bridge and more than 2m away from the outer edge of the released bridge design pile positions.

4. The bridge pile foundation construction method as described in claim 1, characterized in that, Both the first and second sealing materials are soil bags.

5. The bridge pile foundation construction method as described in claim 1, characterized in that, In step S4, the water passage culvert is composed of multiple water passage culvert sections; Multiple sections of the aforementioned water-passing culvert are installed sequentially from upstream to downstream of the river channel, and rubber waterstop rings are installed between adjacent water-passing culvert sections.

6. The bridge pile foundation construction method as described in claim 1, characterized in that, The embankment was constructed at an elevation higher than the historical highest water level.

7. The bridge pile foundation construction method as described in claim 6, characterized in that, The difference between the embankment filling elevation and the historical highest water level is 0.4 to 0.6 meters.

8. The bridge pile foundation construction method as described in claim 1, characterized in that, In step S6, soil is backfilled symmetrically in layers on both sides of the culvert to the embankment filling elevation to form an embankment.

9. The bridge pile foundation construction method as described in claim 1, characterized in that, Step S8 specifically involves backfilling the diversion channel, and compacting it in layers during the backfilling process, and backfilling the diversion channel in layers until the backfill elevation is level with the top of the earthen embankment.

10. The bridge pile foundation construction method as described in claim 1, characterized in that, In step S9: the construction positions of the bridge design piles are marked on the top of the earthen embankment using a total station.

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