CN114032935A

CN114032935A - A formula drainage system is buried to foundation ditch secretly for having a deck bridge plate

Info

Publication number: CN114032935A
Application number: CN202111286221.6A
Authority: CN
Inventors: 许熙; 董锋; 王孝涵; 游才华; 陈宇明; 杨子松; 朱敏峰
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-02-11

Abstract

The invention relates to a foundation pit buried drainage system with a trestle plate, which utilizes a water retaining wall arranged at the edge of a foundation pit as a water transporting pivot, so that the water retaining wall not only plays a role in edge protection, but also plays a role in internal drainage; three branch pipes are buried in the trestle plate in a concealed mode and serve as drainage pipes in the trestle plate, one end of the drainage pipe in the trestle plate is connected with the pipe orifice of a precipitation well in the trestle, the other end of the drainage pipe in the foundation pit retaining wall is led out from the outer side of the trestle plate and connected with the drainage pipe in the foundation pit retaining wall, and the drainage pipe in the foundation pit retaining wall is also connected with the drainage pipe of the precipitation well outside the trestle; and the tail end of the foundation pit retaining wall is provided with a water collecting tank. The invention carries out hidden protection on the exposed drainage pipeline in the prior foundation pit engineering, does not need to worry about the damage of the pipeline caused by factors such as foundation pit excavation or mechanical walking on a trestle, and the like, simultaneously, the drainage system has stable drainage, a few exposed pipelines are easy to replace and maintain, and does not need to worry about the unsmooth water outlet when the foundation pit emergently descends and drains water.

Description

A formula drainage system is buried to foundation ditch secretly for having a deck bridge plate

Technical Field

The invention relates to a set of buried drainage system, in particular to a set of drainage layout suitable for a foundation pit with a trestle bridge plate during excavation construction.

Background

In general foundation ditch engineering, consider that the surrounding environment can restrict the foundation ditch and face the limit working face, the design can arrange the landing stage board as the construction way directly over the foundation ditch, and the landing stage board design is in the same one side of foundation ditch usually, and the foundation ditch excavation and the support installation of being convenient for will fall drainage pipeline and other pipelines and arrange the opposite side at no landing stage simultaneously to reduce the construction influence that the pipeline brought. When a group pit construction or buildings around the foundation pit is met, because the construction access can not be set at the position of the edge of the foundation pit, the trestle plates can only be set at two sides of the foundation pit, so that the drainage pipeline under the trestle can only be turned over the trestle plates, the pipeline is all suspended and exposed, and because the drainage ditch is not arranged at the position of the edge of the foundation pit, the drainage pipeline needs to be laid at the edge and is communicated with the sedimentation tank all the time. This results in long exposed period and wide exposed range of the pipeline, and the pipeline is very easy to be damaged in the excavation process of the foundation pit. In consideration of the arrangement of pain points on the exposed pipeline in the prior art, a buried drainage system for the foundation pit with the trestle bridge plate needs to be designed, so that the pipeline is effectively protected in the whole foundation pit construction process, and the foundation pit dewatering is ensured to be smoothly carried out.

Disclosure of Invention

The invention provides a buried drainage system for a limited space foundation pit with a bridge deck, which can reasonably arrange drainage pipelines during foundation pit construction, realize safe and efficient drainage, is not influenced by cross construction of project branches, and is suitable for the limited space foundation pit with the bridge deck.

In order to achieve the purpose, the technical scheme of the invention is as follows: a foundation pit buried drainage system for a stacked bridge plate utilizes a water retaining wall arranged at the edge of a foundation pit as a water transporting pivot, so that the water retaining wall not only plays a role in edge enclosure, but also achieves an internal drainage function; three branch pipes are buried in the trestle plate in a concealed mode and serve as drainage pipes in the trestle plate, one end of the drainage pipe in the trestle plate is connected with the pipe orifice of a precipitation well in the trestle, the other end of the drainage pipe in the foundation pit retaining wall is led out from the outer side of the trestle plate and connected with the drainage pipe in the foundation pit retaining wall, and the drainage pipe in the foundation pit retaining wall is also connected with the drainage pipe of the precipitation well outside the trestle; and the tail end of the foundation pit retaining wall is provided with a water collecting tank.

Furthermore, two drain pipes are buried in the foundation pit retaining wall.

Furthermore, a three-way interface is reserved for the drain pipe in the foundation pit retaining wall at intervals of about 20 meters and serves as a water inlet, and the drain pipe in the trestle plate and the drainage pipe of the dewatering well outside the trestle are connected to the three-way interface.

Further, the pre-buried nodular well lid of precipitation well mouth of pipe in the landing stage makes things convenient for the later stage to overhaul.

Further, the water collecting tank is connected with the on-site sedimentation tank through a drainage ditch.

The invention has the beneficial effects that:

the invention carries out hidden protection on the exposed drainage pipeline in the prior foundation pit engineering, does not need to worry about the damage of the pipeline caused by factors such as foundation pit excavation or mechanical walking on a trestle, and the like, simultaneously, the drainage system has stable drainage, a few exposed pipelines are easy to replace and maintain, and does not need to worry about the unsmooth water outlet when the foundation pit emergently descends and drains water. The system also reasonably develops the use space of the water retaining wall, achieves the functions of enclosure and drainage, is convenient to operate, is attractive and tidy, and is suitable for most foundation pits with bridge decks to operate.

Drawings

FIG. 1 is a schematic view of a buried drainage system of the present invention

FIG. 2 is a detailed cross-sectional view of a buried drain system of the present invention

FIG. 3 is a schematic view of a pre-buried nodular well cover and a drainage pipe of a dewatering well in a bridge plate;

FIG. 4 is a schematic view of a pre-buried drain pipe and a tee joint in the retaining wall;

FIG. 5 is a schematic view of a three-way joint for communicating a pre-buried drain pipe with a retaining wall;

FIG. 6 is a schematic view of a water outlet collecting tank of the water retaining wall;

in the figure: 1. the landing well casing in the landing stage, 2, landing stage outer landing well casing, 3, the three-way water inlet is reserved with the breakwater to the drainage pipe of landing stage and is linked to each other, 4, the catch basin, 5 landing stage boards, 6, nodular well lid, 7, drain pipe, 8, breakwater, 9, branch pipe, 10, landing stage board reinforcing bar, 11, tee bend interface, 12, escape canal.

With the present embodiment

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 to 6, in the foundation pit buried drainage system for trestle plates, the trestle plates serving as the bearing structures cannot be randomly transformed, and the water retaining walls arranged on the adjacent edges of the foundation pit are used as water transporting hinges, so that the water retaining walls not only play a role in adjacent edge enclosure, but also play a role in internal drainage.

Aiming at the drainage of the precipitation well positioned below the trestle plate, one end of three branch pipes 9 (used for water, electricity and gas) which are buried in the trestle plate 5 in advance is selected to be connected with the 1 port of the precipitation well pipe in the trestle, one end of the branch pipes is led out from the outer side of the trestle plate 5, and the 1 port of the precipitation well pipe in the trestle is sealed by the nodular well cover 6, so that later-stage maintenance is facilitated. 2 drain pipes 7 are buried in the foundation pit retaining wall in a concealed mode, a three-way interface serving as a water inlet is reserved for the drain pipes 7 every 20 m or so, the drain pipes led out of a trestle and the drainage pipes of dewatering wells outside the range of the trestle are connected to the three-way interface 11, and finally a water outlet is arranged at the tail end of the foundation pit retaining wall 8 and connected with a field four-stage sedimentation tank.

The specific implementation process comprises the following steps:

(1) when the trestle is constructed, the drain pipe in the precipitation well is led out in advance at the reinforcement stage, the three branch pipes 9 (electricity, gas and water) are connected and embedded, and the nodular well cover 6 is embedded in the 1 port of the precipitation well pipe in the trestle, so that later-stage maintenance is facilitated, as shown in figure 3.

(2) After the trestle is poured, 2 drain pipes 7 are pre-buried in the foundation pit water retaining wall 8 in a steel bar binding stage, an upward three-way connector 11 is arranged every 20 m, and the drain pipes 7 are paid attention to proper slope placement to ensure that water at a later stage is discharged smoothly, as shown in fig. 4.

(3) Pouring the concrete of the water retaining wall, repairing and leveling the three-way connector 11, and erecting an air pipe, a cable and a drain pipe for water drainage along the outer side of the water retaining wall 8 to ensure that the operation of vehicle personnel is not influenced.

(4) The drainage pipes led out from the trestle are connected with a three-way joint 11 reserved on the water retaining wall 8, and meanwhile, the drainage pipes of other dewatering wells in the pit are also communicated with the water retaining wall 8, as shown in figure 5.

(5) A small water collecting tank 4 is built at the water outlet of the water retaining wall 8, and water is drained to the four-stage sedimentation tank through a drainage ditch 12. As shown in fig. 6.

(6) And when a water pumping test is carried out, the working condition of the dewatering well is smooth, and the water is smoothly discharged from the water outlet.

Claims

1. The utility model provides a bury formula drainage system for there is foundation ditch of deck bridge board which characterized in that: the water retaining wall arranged on the adjacent edge of the foundation pit is used as a water transporting pivot, so that the water retaining wall not only plays a role in adjacent edge protection, but also achieves an internal drainage effect; three branch pipes are buried in the trestle plate in a concealed mode and serve as drainage pipes in the trestle plate, one end of the drainage pipe in the trestle plate is connected with the pipe orifice of a precipitation well in the trestle, the other end of the drainage pipe in the foundation pit retaining wall is led out from the outer side of the trestle plate and connected with the drainage pipe in the foundation pit retaining wall, and the drainage pipe in the foundation pit retaining wall is also connected with the drainage pipe of the precipitation well outside the trestle; and the tail end of the foundation pit retaining wall is provided with a water collecting tank.

2. The underground drainage system for foundation pits with trestle plates as claimed in claim 1, wherein: two drain pipes are buried in the foundation pit retaining wall.

3. The underground drainage system for foundation pits with trestle plates as claimed in claim 2, wherein: and a three-way interface is reserved in the drain pipe in the foundation pit retaining wall at intervals of about 20 meters and serves as a water inlet, and the drain pipe in the trestle plate and the drain pipe of the dewatering well outside the trestle are connected to the three-way interface.

4. The underground drainage system for foundation pits with trestle plates as claimed in claim 1, wherein: the pre-buried nodular well lid of precipitation well mouth of pipe in the landing stage makes things convenient for the later stage to overhaul.

5. The underground drainage system for foundation pits with trestle plates as claimed in claim 1, wherein: the water collecting tank is connected with the on-site sedimentation tank through a drainage ditch.