CN110106887B

CN110106887B - Pump pit processing method and pump pit

Info

Publication number: CN110106887B
Application number: CN201910377062.7A
Authority: CN
Inventors: 马宝财; 张红玉; 王林青; 李章峰; 赵得元; 郭付平; 苏进国; 马明德; 张学杰; 王海涛
Original assignee: Qinghai Salt Lake Industry Co Ltd
Current assignee: Qinghai Salt Lake Industry Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2021-04-30
Anticipated expiration: 2039-05-07
Also published as: CN110106887A

Abstract

The invention discloses a pump pit processing method, which comprises the following steps: excavating a foundation pit; backfilling stones in the foundation pit for stone throwing and silt squeezing to form a backfill layer, wherein the stones are one or a combination of more of rubbles, rubbles and pebbles; and building a retaining wall on the side of the backfill layer to form a pump pit. According to the pump pit treatment method provided by the invention, the backfilling stones are filled in the foundation pit for rubble throwing and silt squeezing, the stones squeeze silt in the foundation pit out, and the stones squeeze the silt out of the range of the foundation pit mutually, so that the backfilling layer is compact, the bearing capacity of the foundation pit is improved, and the sedimentation amount is reduced, therefore, the strength of the pump pit is enhanced, the stability of the foundation of the pump pit is ensured, the pump pit treated by the treatment method has strong brine corrosion resistance, is not easy to generate landslide, sedimentation or collapse, and has long service life; the method has the advantages of rapid construction, simple process and convenient maintenance.

Description

Pump pit processing method and pump pit

Technical Field

The invention relates to the technical field of pump pit structures, in particular to a pump pit and a processing method thereof for corrosion prevention in a mining area.

Background

At present, a Carlo salt lake area located in a firewood basin is a main mining area for producing potassium fertilizers such as potassium chloride and the like, underground brine in the salt lake area is rich, the water level of the underground brine is high, and a pump pit is usually built on the Carlo salt lake for facilitating extraction and transportation of the brine, is a pit groove for placing a pump or a pump station and is generally built on the basis of concrete.

However, the soil quality of the region of the khar salt lake is chlorine saline soil, the saline soil is general names of saline soil, alkaline earth and various salinized and alkalized soils, the saline soil refers to the soil with the content of soluble salts in the soil which has obvious harm to the growth of crops, and the alkaline earth refers to the soil containing a large amount of exchangeable sodium which is harmful to the growth of plants and changes the soil property. Therefore, when water exists, salt in the saline soil can form brine to corrode concrete, once the reinforced concrete is soaked in the brine for a long time, the brine is easy to crisp the concrete, the concrete can continuously fall off, and the phenomenon that a pumping station slips, subsides or collapses due to unstable foundation is easily caused, so that the operation time of the pumping station is short, and the maintenance is inconvenient.

Disclosure of Invention

The invention aims to provide a pump pit and a treatment method thereof, and aims to solve the problems that a concrete pump pit is easy to collapse and inconvenient to maintain due to the fact that the concrete pump pit is easy to corrode by brine in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme: a method of treating a pump pit, the method comprising the steps of: excavating a foundation pit; backfilling stones in the foundation pit for stone throwing and silt squeezing to form a backfill layer, wherein the stones are one or a combination of more of rubbles, rubbles and pebbles; and building a retaining wall on the side of the backfill layer to form a pump pit.

Further, the pump pit processing method further comprises the following steps: and (5) rolling after backfilling stones.

Further, the thickness of the backfill layer is more than or equal to 80 cm.

Furthermore, the retaining wall is a gunny bag retaining wall filled with sand inclusion stones.

Further, the slope ratio range of the retaining wall is 1: 1.15-1: 1.2.

the invention also provides a pump pit, which comprises a foundation pit, a backfill layer arranged in the foundation pit and a retaining wall arranged on the side edge of the backfill layer; the backfill layer is one or a combination of a plurality of rubbles, rubbles and pebbles.

Further, the thickness of the backfill layer is more than or equal to 80 cm.

Further, the slope ratio range of the retaining wall is 1: 1.15-1: 1.2.

compared with the prior art, the pump pit and the processing method thereof provided by the invention have the following advantages:

according to the pump pit treatment method provided by the invention, the backfilling stones are filled in the foundation pit for rubble throwing and silt squeezing, the stones squeeze silt in the foundation pit out, and the stones squeeze the silt out of the range of the foundation pit mutually, so that the backfilling layer is compact, the bearing capacity of the foundation pit is improved, and the sedimentation amount is reduced, therefore, the strength of the pump pit is enhanced, the stability of the foundation of the pump pit is ensured, the pump pit treated by the treatment method has strong brine corrosion resistance, is not easy to generate landslide, sedimentation or collapse, and has long service life; the method has the advantages of rapid construction, simple process and convenient maintenance.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:

FIG. 1 is a flow chart illustrating the steps of a pump pit processing method according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a pump well according to a preferred embodiment of the present invention;

fig. 3 is a top view of the pump well of fig. 2.

Reference numerals:

1-foundation pit, 2-backfill layer,

3-retaining wall.

Detailed Description

The present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific examples described in the following embodiments of the present invention are merely illustrative of specific embodiments of the present invention and do not limit the scope of the invention.

The invention is further described with reference to the following figures and detailed description of embodiments.

As shown in fig. 1 to 3, wherein fig. 1 is a flow chart illustrating steps of a pump pit processing method according to a preferred embodiment of the present invention; FIG. 2 is a cross-sectional view of a pump well according to a preferred embodiment of the present invention; fig. 3 is a top view of the pump well of fig. 2.

The embodiment is a pump pit processing method, which is particularly suitable for a pump pit in a mining area of a salt lake region or a pumping pit in a mining area of a saline soil region, wherein the processed pump pit is used for placing a pump or a pump station.

The pump pit treatment method comprises the following steps:

step S1, excavating a foundation pit 1;

step S2, backfilling stones in the foundation pit 1 to perform stone throwing and silt squeezing so as to form a backfill layer 2; the stones are one or a combination of a plurality of stones, rubbles and pebbles;

and step S3, building a retaining wall 3 on the side of the backfill layer 2 to form a pump pit.

In the treatment method of the pump pit provided by the embodiment, the backfilling stones are filled in the foundation pit 1 for rubble throwing and silt squeezing, the stones squeeze silt in the foundation pit 1 out, the stones squeeze the silt out of the range of the foundation pit 1 mutually, so that the backfilling layer 2 is compact, the bearing capacity of the foundation pit 1 is improved, the sedimentation amount is reduced, the strength of the pump pit is enhanced, the stability of the foundation of the pump pit is ensured, the pump pit treated by the treatment method is strong in brine corrosion resistance, is not easy to slide, settle or collapse, and is long in service life; the method has the advantages of rapid construction, simple process, convenient maintenance, short construction period and cost saving.

Further, in the step S1, when the foundation pit 1 is excavated, the excavation area of the foundation pit 1 is larger than the design area of the pump station, so that it is ensured that the pump station still has enough working space after backfilling and retaining wall masonry.

Further, the thickness of the backfill layer 2 is more than or equal to 80cm, so that the stability of the pump pit foundation is ensured. The stones used to form the backfill layer 2 are one or a combination of stones, rubbles, pebbles. The flaky rock refers to rock meeting engineering requirements, and the stone with an irregular shape and a side length of not less than 15 cm is obtained through mining selection; the rubble is an unformed stone which is in a natural state after mining and is an irregular stone obtained by blasting or artificial cutting of the rock, the irregular stone is called a messy stone, and the rubble with two approximately parallel surfaces is called a flat rubble; pebbles refer to natural oval particles without edges and corners, the particle size of which is 60-200 mm, and the weathered rocks are conveyed by water flow for a long time; therefore, the stones used for forming the backfill layer 2 are larger stones, which have good strength and save backfill time, and of course, other stones with sizes similar to the size of the rubble, rubble and pebble, or other materials with sufficient strength can be used for forming the backfill layer 2.

Further, the pump pit processing method further comprises the following steps: and (5) rolling after backfilling stones. The backfill layer 2 is more compact due to rolling, and the foundation of the pump pit is more stable.

Further, the retaining wall 3 is a gunny bag retaining wall filled with sand inclusion stones. Specifically, sandstones are filled in the gunny bags, and the sandstones are sand and stones mixed according to a certain proportion and are also called graded sandstones; after the sand is equipped with the sand inclusion stone in the sack, a plurality of sacks are range upon range of and are placed, and the compaction is built by laying bricks or stones according to certain slope ratio layer by layer to form

barricade

3, 3 stable in structure of barricade to long service life, anti scour protection homoenergetic are effectual.

Further, the slope ratio range of the retaining wall 3 is 1: 1.15-1: 1.2, in the slope ratio scope, the intensity and the stability of barricade 3 are better.

It should be noted that, since fig. 3 is a top view, and only the treated pump pit can be seen from a top view, the backfill layer 2 is partially shown in fig. 3, and the retaining wall 3 is built around the backfill layer 2 to enhance stability; and the pump station related structures extend into the pump pit, and are not described in detail herein.

The invention also provides a pump pit, which comprises a foundation pit 1, a backfill layer 2 arranged in the foundation pit 1 and a retaining wall 3 arranged on the side edge of the backfill layer 2; the backfill layer 2 is one or a combination of a plurality of rubbles, rubbles and pebbles.

Further, the thickness of the backfill layer 2 is more than or equal to 80 cm.

Further, the retaining wall 3 is a gunny bag retaining wall filled with sand inclusion stones.

Further, the slope ratio range of the retaining wall 3 is 1: 1.15-1: 1.2.

the structure of each part has been described and explained in detail above in connection with the method, and will not be described again here.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim.

Claims

1. A treatment method of a pump pit is used in a salt lake area, and the soil quality is saline soil quality, and is characterized by comprising the following steps:

excavating a foundation pit (1);

backfilling stones in the foundation pit (1) to perform stone throwing and silt squeezing so as to form a backfill layer (2), wherein the stones are one or a combination of more of rubbles, rubbles and pebbles;

barricade (3) is built by laying bricks or stones to the side of backfill layer (2) to form the pump pit, barricade (3) is for being equipped with sand bag barricade of pressing from both sides stone, and the pipeline of pump station runs through stretch into behind barricade (3) in the pump pit.

2. The method of claim 1, further comprising: and (5) rolling after backfilling stones.

3. A method for treating a pump pit according to claim 1, characterized in that the backfill layer (2) has a thickness of 80cm or more.

4. A method according to claim 1, wherein the slope ratio of the retaining wall (3) is in the range of 1: 1.15-1: 1.2.

5. a pump pit, which is prepared by the method according to claim 1, wherein the pump pit comprises a foundation pit (1), a backfill layer (2) arranged in the foundation pit (1), and retaining walls (3) arranged on the side edges of the backfill layer (2); the backfill layer (2) is a combination of one or more of rubble, rubble and pebble, and the retaining wall (3) is a gunny bag retaining wall filled with sand inclusion stones.

6. A pump pit according to claim 5, characterized in that the backfill layer (2) has a thickness of 80cm or more.

7. A pump pit according to claim 5, characterized in that the slope ratio of the retaining wall (3) is in the range of 1: 1.15-1: 1.2.