1. A bridge pile foundation construction method is characterized by comprising the following steps:

step S1, placing a bridge design pile position in the river channel according to the design drawing, and marking;

step S2, determining the position and the row number of the water passing pipe culvert to be installed according to the released bridge design pile position, and arranging a river channel in a construction area to comprise a first side and a second side opposite to the first side, wherein the side of the river channel to be installed with the water passing pipe culvert is the first side;

step S3, arranging a first plugging object on the upstream face of the first side of the river channel to form a diversion river channel on the second side of the river channel;

step S4, installing the water passing pipe culvert, and placing second plugging objects on two sides of the water passing pipe culvert to limit the water passing pipe culvert;

step S5, checking the historical highest water level of the river channel in the construction period of the pile foundation according to the construction progress requirement of the pile foundation on site, and acquiring the filling elevation of the earth dike according to the historical highest water level;

step S6, backfilling earthwork on two sides of the water passing pipe culvert to the earth embankment filling elevation to form an earth embankment;

step S7, removing the first plugging object on the upstream side of the river channel;

step S8, backfilling the diversion river channel;

and S9, releasing the construction position of the designed pile position of the bridge at the top of the earth dike, and performing subsequent pile foundation construction process according to the construction position.

2. The bridge pile foundation construction method according to claim 1, wherein the step S1 is specifically:

and measuring the designed pile position of the bridge in the river channel according to the plane coordinate of the designed pile position of the bridge of the design drawing, and marking on water.

3. The bridge pile foundation construction method according to claim 1, wherein in the step S2:

and according to the released bridge design pile position, calculating the position and the row number of the water passing pipe culvert to be installed in the area which is more than 2m away from the outer side line of the released bridge design pile position along the transverse direction of the bridge.

4. The bridge pile foundation construction method of claim 1, wherein the first and second plugs are soil bags.

5. The bridge pile foundation construction method according to claim 1, wherein in the step S4, the water passing culvert is composed of a plurality of sections of water passing culvert sections;

wherein, install the multisection in proper order from the upper reaches to the low reaches in the river course water pipe culvert section, and install rubber seal ring between the adjacent water pipe culvert section of crossing.

6. The bridge pile foundation construction method of claim 1, wherein the level of the embankment fill is greater than the historical maximum water level.

7. The method for constructing a bridge pile foundation according to claim 6, wherein the difference between the earth embankment filling elevation and the historical maximum water level is 0.4-0.6 m.

8. The method for constructing a bridge pile foundation according to claim 1, wherein in the step S6, the two sides of the water passing pipe culvert are symmetrically backfilled with earth layer by layer to the earth embankment filling elevation to form an earth embankment.

9. The bridge pile foundation construction method according to claim 1, wherein the step S8 is specifically:

and backfilling the diversion river channel, performing layered rolling in the backfilling process, and backfilling the diversion river channel layer by layer until the backfilling elevation is flush with the top of the soil bank.

10. The bridge pile foundation construction method according to claim 1, wherein in step S9:

and releasing the construction position of the designed pile position of the bridge at the top of the earth dike by using a total station.

Background

In the process of urbanization construction, a plurality of small and medium-sized bridges need to be built, in bridge foundation construction, when bridge piers and platform foundations are located below the ground water level, river channels are mostly changed or plugged in the existing small and medium-sized bridge pile foundation construction, but the method needs to increase temporary land acquisition to change the river channels or cut off rivers, and is uneconomical and difficult to construct; a few steel sheet pile cofferdams are adopted, but the construction difficulty and the cost are high by the method; these are undesirable to those skilled in the art.

Disclosure of Invention

Due to the defects in the prior art, the invention provides a bridge pile foundation construction method, which comprises the following steps:

step S1, placing a bridge design pile position in the river channel according to the design drawing, and marking;

step S2, determining the position and the row number of the water passing pipe culvert to be installed according to the released bridge design pile position, and arranging a river channel in a construction area to comprise a first side and a second side opposite to the first side, wherein the side of the river channel to be installed with the water passing pipe culvert is the first side;

step S3, arranging a first plugging object on the upstream face of the first side of the river channel to form a diversion river channel on the second side of the river channel;

step S4, installing the water passing pipe culvert, and placing second plugging objects on two sides of the water passing pipe culvert to limit the water passing pipe culvert;

step S5, checking the historical highest water level of the river channel in the construction period of the pile foundation according to the construction progress requirement of the pile foundation on site, and acquiring the filling elevation of the earth dike according to the historical highest water level;

step S6, backfilling earthwork on two sides of the water passing pipe culvert to the earth embankment filling elevation to form an earth embankment;

step S7, removing the first plugging object on the upstream side of the river channel;

step S8, backfilling the diversion river channel;

and S9, releasing the construction position of the designed pile position of the bridge at the top of the earth dike, and performing subsequent pile foundation construction process according to the construction position.

Preferably, the step S1 specifically includes:

and measuring the designed pile position of the bridge in the river channel according to the plane coordinate of the designed pile position of the bridge of the design drawing, and marking on water.

Preferably, in the step S2:

and according to the released bridge design pile position, calculating the position and the row number of the water passing pipe culvert to be installed in the area which is more than 2m away from the outer side line of the released bridge design pile position along the transverse direction of the bridge.

Preferably, the first plugging object and the second plugging object are both soil bags.

Preferably, in the step S4, the water pipe culvert is composed of a plurality of sections of water pipe culvert sections;

wherein, install the multisection in proper order from the upper reaches to the low reaches in the river course water pipe culvert section, and install rubber seal ring between the adjacent water pipe culvert section of crossing.

Preferably, the filling elevation of the unearthed embankment is greater than the historical highest water level.

Preferably, the difference between the earth embankment filling elevation and the historical highest water level is 0.4-0.6 m.

Preferably, in the step S6, the two sides of the water pipe culvert are symmetrically backfilled with earth layer by layer to the earth embankment filling elevation to form an earth embankment.

Preferably, the step S8 specifically includes:

backfilling the diversion river channel, carrying out layered rolling in the backfilling process, and backfilling the diversion river channel layer by layer until the backfilling elevation is flush with the top of the soil bank;

preferably, in step S9:

and releasing the construction position of the designed pile position of the bridge at the top of the earth dike by using a total station.

Compared with the prior art, the invention has the following advantages or beneficial effects:

according to the bridge pile foundation construction method provided by the invention, the water pipe culvert is used for draining river water, the earth dike is built to provide a construction site for the bridge pile foundation construction, a large amount of earthwork operation can be effectively reduced, the construction process is simple, temporary land acquisition is not needed to be added for constructing the access roads and the access bridges, and the construction cost can be effectively reduced.

Drawings

FIG. 1 is a flow chart of a bridge pile foundation construction method in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of bridge pile foundation construction in the embodiment of the invention;

FIG. 3 is a cross-sectional view of bridge pile foundation construction in an embodiment of the invention;

FIG. 4 is a top view of bridge pile foundation construction in an embodiment of the present invention;

wherein: the river course 1, the water passing pipe culvert 2, the soil bag 3, the bridge designed pile position 4, the soil dike 5 and the diversion river course 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the invention discloses a bridge pile foundation construction method, which is applicable to bridge pile foundation construction with a river width within 30 meters and a water depth below 3 meters, and can effectively solve the problems of uneconomical and difficult construction, such as the need of land acquisition and river channel change or river cut-off during the construction of bridge pile foundations in small and medium-sized rivers; the method has low construction difficulty, does not need to increase temporary land acquisition, and is economical and applicable. Specifically, the construction method comprises the following steps:

step S1, placing a bridge design pile position 4 in the river channel 1 according to the design drawing, and marking; specifically, according to the plane coordinates of the bridge design pile position 4 of the design drawing, the measurer measures the bridge design pile position 4 in the river channel 1 (for example, the width of the river channel 1 is 12m, and the water depth is 1m), and marks the bridge design pile position 4 on the water.

Step S2, determining the position and the row number of the water passing pipe culvert 2 to be installed (the water passing pipe culvert 2 is a concrete water passing pipe culvert 2) according to the released bridge design pile position 4, arranging a river channel 1 in a construction area to comprise a first side and a second side opposite to the first side, and arranging the first side of the river channel 1 to be installed with the water passing pipe culvert 2.

Specifically, survey crew calculates the position and row number of water pipe culvert 2 to be installed in the region more than 2m along the bridge is horizontal and from 4 outside sidelines in the bridge design pile position 4 that emit according to the bridge design pile position 4 that emits to guarantee that the position of water pipe culvert 2 to be installed is located the position that does not influence the pile foundation construction.

Step S3, a soil bag 3 is placed on the upstream side of the first side of the river channel 1 to form a diversion river channel 6 on the second side of the river channel 1.

Specifically, according to the construction position which does not affect the bridge design pile position 4 after calculation, the upstream face of the first side of the river channel 1 is provided with the soil bags 3 and the cofferdams filled with the soil bags 3 so as to form a diversion river channel 6 and diversion river water at the second side of the river channel 1.

And step S4, installing the water passing pipe culverts 2 according to the positions and the row number of the water passing pipe culverts 2 to be installed determined in the step S2, and placing soil bags 3 at the two sides of the water passing pipe culverts 2 to limit the water passing pipe culverts 2.

Preferably, in step S4, the water passing culvert 2 is composed of a plurality of sections of water passing culvert sections; wherein, install multisection water pipe culvert section from the upper reaches to the low reaches of river course 1 in proper order, and install the rubber sealing washer between the adjacent water pipe culvert section.

Specifically, after diversion, the river channel 1 starts to lay a single row or multiple rows of prefabricated concrete water passing culverts 2 at a position which is transverse to the bridge and is more than 2m away from the outer side line of the designed pile position 4 and does not influence the construction position of the designed pile position 4 of the bridge, wherein the inner diameter of each water passing pipe culvert 2 is 1m, the outer diameter of each water passing pipe culvert is 1.2m, and each water passing pipe culvert is 2.5m long; the water passing pipe culvert sections are sequentially installed from the upstream to the downstream of the river channel 1 in the laying process; in order to prevent the laid water passing pipe culvert 2 from leaking water, a rubber water stop ring which is expanded when meeting water is arranged at the connecting part of each section of the water passing pipe culvert, so that the effect that the connecting part of the water passing pipe culvert 2 is watertight is achieved.

Specifically, after having laid first festival water pipe culvert section, place soil bag 3 in the both sides of first festival water pipe culvert section, will first festival water pipe culvert section fixed, later install the second festival water pipe culvert section again and fix, after every water pipe culvert section installation finishes promptly, again in proper order this water pipe culvert section bilateral symmetry place soil bag 3 to fixed water pipe culvert 2 of crossing.

And step S5, checking the historical highest water level of the river channel 1 in the pile foundation construction period according to the on-site pile foundation construction progress requirement, and acquiring the earth embankment filling elevation according to the historical highest water level.

Specifically, local hydrogeological information is checked, the historical highest water level of the river channel 1 in the planned pile foundation construction period is checked, and the filling elevation of the earth dike 5 is obtained according to the highest water level and 0.5m of heightened backfill.

Step S6, symmetrically backfilling earthwork on two sides of the water passing pipe culvert 2 layer by layer to fill elevation of the soil embankment 5 to form the soil embankment 5, so as to manufacture a working surface for the pile driver; specifically, after the soil bags 3 are placed, the two sides of the water passing pipe culvert 2 are backfilled, and the backfilling is carried out symmetrically, in a layered mode, and is carried out in a layered rolling mode, so that water leakage caused by displacement due to overlarge lateral pressure of the water passing pipe culvert 2 is prevented.

Step S7, removing the soil bags 3 on the upstream side of the river; so that the river water is drained to the water passing pipe culvert 2 and flows to the downstream through the water passing pipe culvert 2.

And step S8, backfilling the diversion river channel 6, performing layered rolling in the backfilling process, and backfilling the diversion river channel 6 in layers until the backfilling elevation is flush with the top of the soil bank 5.

And step S9, the survey crew uses the total station to discharge the construction position of the bridge design pile position 4 at the top of the earth dike 5 and mark the construction position, and then the subsequent pile foundation construction process is carried out according to the construction position.

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

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