CN114737586A

CN114737586A - Multi-well-point linkage precipitation construction method for large basement in water-rich sandy soil area

Info

Publication number: CN114737586A
Application number: CN202210422064.5A
Authority: CN
Inventors: 李延春; 张勋来
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-07-12

Abstract

The invention discloses a multi-well-point linkage precipitation construction method for a large basement in a water-rich sandy soil area, and relates to the technical field of constructional engineering. The multi-well-point linkage precipitation construction method for the large basement in the water-rich sandy soil area specifically comprises the following operations: the method comprises the following steps: according to the geological survey report, a certain number of sand-proof soil loss pipe well dewatering wells are arranged on the basement bottom plate post-pouring zone through calculation. This large-scale basement multiple-well-point linkage precipitation construction method in rich water sandy soil district through the large-scale basement multiple-well-linkage precipitation of an innovation rich water sandy soil district, set up the precipitation well in basement bottom plate post-cast strip position, utilize the mode of establishing ties to collect groundwater to the catch basin in, concentrate the drainage system of discharging to the foundation ditch outside, can also utilize the catch basin to do the water (wash debris and maintenance) of supplementary water before and after the concrete construction, both guarantee basement engineering construction progress and construction quality, practice thrift the cost again, thereby realize the target of project economic interest maximize.

Description

Multi-well-point linkage precipitation construction method for large basement in water-rich sandy soil area

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a multi-well-point linkage precipitation construction method for a large basement in a water-rich sandy soil area.

Background

At present, the building area of residential districts in China is larger and larger, the quality requirement is higher and higher, people and vehicles are shunted, various vehicles are forbidden to be parked in the districts, people basically purchase the vehicles for going out conveniently along with the improvement of living conditions, and the building area of basements is larger and larger (civil air defense engineering or underground parking lots) in order to meet the requirement of use functions. In the whole construction process of large basement engineering, how to reduce the underground water level is the primary condition for ensuring the engineering quality and the construction progress of the basement.

In the practice of large basement foundation pit dewatering, a pipe well dewatering scheme is generally adopted. The conventional method comprises the following steps: and (4) drilling dewatering wells at certain intervals by calculation, installing a water pump, and continuously draining water until the underground water level is reduced to a required level. However, because the basement has a wide range and a large area, each pipe well dewatering well is independently discharged out of a drainage system except a foundation pit, so that construction is influenced due to more drainage pipes in the basement construction process, and the drainage pipes are broken due to stumbling and stumbling, so that the construction quality of basement engineering is influenced.

Before earthwork excavation, a construction site precipitation scheme is formulated according to the soil type, the groundwater level elevation and the like described by a geological survey report, so that the construction progress, the quality and the safety of basement engineering are prevented from being influenced due to the fact that earthwork of a foundation pit is not opened in place due to the characteristics of soil, overhigh groundwater and the like.

In the large-scale basement foundation ditch precipitation well work progress of building engineering, because its scope is wider, the area is great, in each tube well precipitation well all discharges the drainage system outside the foundation ditch alone, can lead to in the basement work progress, because of the more influence construction of drain pipe, still can cause the drain pipe to break because of stumbling that knocks, influence basement engineering's construction quality.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a multi-well-point linkage precipitation construction method for a large basement in a water-rich sandy soil area, which solves the problems that in the construction process of a foundation pit precipitation well of a large basement in a building engineering, because the range is wider and the area is larger, each pipe well precipitation well is independently discharged out of a drainage system except the foundation pit, the construction is influenced due to more drainage pipes in the construction process of the basement, and the construction quality of the basement engineering is influenced due to the fact that the drainage pipes are broken due to stumbling.

(II) technical scheme

In order to realize the purpose, the invention is realized by the following technical scheme: a multi-well-point linkage dewatering construction method for a large basement in a water-rich sandy soil area specifically comprises the following operations:

the method comprises the following steps: according to a geological survey report, a certain number of sand-proof soil loss pipe well dewatering wells are arranged on a rear casting belt of a basement bottom plate through calculation, a submersible pump with a water level controller is installed, and a DN50 drainage pipe, a DN75 drainage pipe and a DN100 drainage pipe are connected;

step two: before the foundation pit is excavated, discharging each sand-proof soil loss pipe well dewatering well into a drainage system outside the foundation pit;

step three: after excavation of the foundation pit is finished, arranging foundation pit drainage ditches at the periphery of the foundation pit, and arranging a certain number of water collecting tanks outside the foundation pit drainage ditches according to field practice;

step four: connecting submersible pumps with water level controllers by using DN50 drain pipes and DN75 drain pipes, sequentially connecting the submersible pumps in series, discharging the submersible pumps into a water collecting well, and discharging the submersible pumps into a drainage system outside a foundation pit by using a DN100 drain pipe;

step five: a three-way gate valve is arranged on the DN100 water discharge pipe.

(III) advantageous effects

The invention provides a multi-well-point linkage precipitation construction method for a large basement in a water-rich sandy soil area. The method has the following beneficial effects:

this large-scale basement multi-well point linkage precipitation construction method in rich water sand soil district, through the large-scale basement multi-well linkage precipitation in an innovation rich water sand soil district, set up the precipitation well in basement bottom plate post-cast strip position, utilize the mode of establishing ties to collect groundwater to the catch basin in, concentrate the drainage system of discharging to beyond the foundation ditch, can also utilize the catch basin to do the supplementary water (wash debris and maintenance) water use around the concrete construction, both guarantee basement engineering construction progress and construction quality, and the cost is saved again, thereby realize the target of project economic interest maximize.

Drawings

FIG. 1 is a structural elevation of the present invention;

FIG. 2 is a plan view of the structure of the present invention.

In the figure: 1. post-pouring a strip on the basement floor; 2. a pipe well dewatering well for preventing sandy soil loss; 3. a submersible pump with a water level controller; 4. DN50 drain pipe; 5. DN75 drain pipe; 6. DN100 drain pipe; 7. a foundation pit drainage ditch; 8. a water collecting tank; 9. a high-power submersible pump; 10. three-way gate valve.

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.

Referring to fig. 1-2, the present invention provides a technical solution: a multi-well-point linkage dewatering construction method for a large basement in a water-rich sandy soil area specifically comprises the following operations:

step two: before the foundation pit is excavated, discharging each sandy soil loss prevention pipe well dewatering well into a drainage system outside the foundation pit;

step four: connecting a DN50 drain pipe and a DN75 drain pipe with submersible pumps with water level controllers in sequence, connecting the submersible pumps in series, discharging the submersible pumps into a water collecting well, and discharging the submersible pumps with high power installed in the water collecting well into a drainage system outside a foundation pit through a DN100 drain pipe;

The working principle is as follows: before the construction of a large basement in a water-rich sandy soil area, a sand-proof soil loss pipe well precipitation well is arranged on a late poured band of a basement bottom plate, each precipitation well independently drains water before foundation pit earthwork excavation, after the foundation pit earthwork excavation is finished, the precipitation wells are connected in series and drained into a water collecting pool, the water collecting pool can drain away by a high-power submersible pump, a three-way gate valve is arranged on a drain pipe connected with the precipitation well, underground water collected in the water collecting well can be timely drained into an external water drainage system of the foundation pit, water in the water collecting well can be utilized for secondary utilization, the method is used for concrete maintenance or basic layer flushing and the like, the construction progress and construction quality of basement engineering can be guaranteed, the cost is saved, and the aim of maximizing economic benefits of projects is achieved.

In conclusion, the construction method for the large basement multi-well point linkage precipitation in the water-rich sandy soil area has the advantages that the multi-well linkage precipitation of the large basement in the water-rich sandy soil area is achieved, the precipitation well is arranged at the rear pouring zone position of the basement bottom plate, underground water is collected into the water collection pool in a series connection mode and is discharged out of a foundation pit in a centralized mode, water can be used as auxiliary water (washing sundries and maintaining) before and after concrete construction in the water collection pool, the construction progress and the construction quality of basement engineering are guaranteed, the cost is saved, and the purpose of maximizing economic benefits of projects is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "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.

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.

Claims

1. A multi-well-point linkage precipitation construction method for a large basement in a water-rich sandy soil area is characterized by comprising the following steps of: the specific operation is as follows: