阅读说明：本技术 一种桩基础泥浆循环及零排放系统和方法 (Pile foundation slurry circulation and zero discharge system and method ) 是由 杨立志 姜兆福 陈曦 李康 张晓旭 史富伟 于 2021-07-22 设计创作，主要内容包括：本发明公开一种桩基础泥浆循环及零排放系统和方法,循环施工过程包括如下：步骤一,通过泥浆制备方法在制浆区制备施工所需泥浆；步骤二,检测制浆区的泥浆性能指标,符合检测要求的泥浆传送至储浆区,储浆区内存储新制备的泥浆及循环后的泥浆；步骤三,储浆区内的泥浆通过管道循环区进入到泥浆置换区；步骤四,泥浆置换区将泥浆进行循环筛分,筛分出沙粒以及置换区废渣土；步骤五,使用后的循环泥浆输送到废弃泥浆零排放处理区,循环泥浆经过第一级筛分处理得出可回收使用泥浆和废弃泥浆；步骤六,可回收使用泥浆输送至储浆区,废弃泥浆经过第二级筛分处理得出泥浆加工滤液和置换区废渣土,置换区废渣土和置换区废渣土一起外运出施工场地外。(The invention discloses a system and a method for pile foundation slurry circulation and zero discharge, wherein the circulation construction process comprises the following steps: step one, preparing slurry required by construction in a slurry preparation area by a slurry preparation method; step two, detecting the slurry performance index of the pulping area, transmitting the slurry meeting the detection requirement to a slurry storage area, and storing the newly prepared slurry and the circulated slurry in the slurry storage area; step three, the slurry in the slurry storage area enters a slurry replacement area through a pipeline circulation area; step four, the slurry displacement area circularly screens the slurry, and sand grains and waste residue soil in the displacement area are screened out; conveying the used circulating slurry to a waste slurry zero-emission treatment area, and performing primary screening treatment on the circulating slurry to obtain recyclable slurry and waste slurry; and step six, the recyclable slurry is conveyed to a slurry storage area, the waste slurry is subjected to secondary screening treatment to obtain slurry processing filtrate and waste residue soil in a replacement area, and the waste residue soil in the replacement area are transported out of a construction site together.)

1. The pile foundation mud circulation and zero emission system and method are characterized in that pile foundation mud circulation construction is carried out through a mud making area, a mud storage area, a pipeline circulation area, a mud replacement area and a waste mud zero emission treatment area, and the mud circulation construction process specifically comprises the following steps:

preparing a material for preparing slurry, and preparing the slurry required by construction in a slurry preparation area according to construction requirements by a slurry preparation method;

step two, detecting the slurry performance index of the slurry preparation area, transmitting the slurry meeting the detection requirement to a slurry storage area, storing the newly prepared slurry in the slurry storage area and collecting the slurry after construction circulation in other areas;

step three, the slurry in the slurry storage area enters a slurry replacement area through a pipeline circulation area;

step four, the slurry displacement area circularly screens the slurry, and sand grains and waste residue soil in the displacement area are screened out;

step five, the mud replacement area conveys the recycled mud to a waste mud zero-emission treatment area, and the recycled mud is subjected to primary screening treatment to obtain recyclable mud and waste mud;

and step six, the recyclable slurry is conveyed to a slurry storage area, the waste slurry is subjected to secondary screening treatment to obtain slurry processing filtrate and waste residue soil in a replacement area, and the waste residue soil in the replacement area are transported out of a construction site together.

2. The pile foundation mud circulation and zero discharge system and method according to claim 1, wherein the slurrying area includes a slurrying pond, the slurrying pond being connected to a slurrying pipeline mechanism;

the pulping pipeline mechanism comprises a pulping circulating pipe and a pulping circulating pump, the pulping circulating pump is positioned in the pulping pool and is connected with the inlet end of the pulping circulating pipe, the pulping circulating pipe is connected with a pulp feeding hopper in series, the outlet end of the pulping circulating pipe is communicated with the pulping pool, and the pulping circulating pump sucks slurry in the pulping pool and discharges the slurry into the pulping pool through the pulping circulating pipe.

3. The pile foundation mud circulation and zero discharge system and method according to claim 2, wherein the mud preparation method employs a slurrying pond and a slurrying pipeline mechanism, and specifically comprises the following steps:

step A1, preparing materials prepared from the slurry, wherein the materials comprise water, bentonite, CMC cellulose, soda ash and barite; adjusting the doping amount of the barite according to the density of the slurry;

step A2, according to the proportioning requirement of slurry preparation, firstly carrying out a raw material performance detection test;

a3, transporting slurry materials to one side of a pulping tank according to the material proportion after the raw material performance detection test;

step A4, introducing water into the pulping tank, and enabling the pulping circulating pump to work to enable the water in the pulping tank to circulate in the pulping pipeline mechanism and the pulping tank;

step A5, the bentonite enters a pulping circulation pipe through a pulp feeding hopper, and the flushing and stirring time is 4-6 minutes; CMC cellulose and soda ash enter the pulping circulation pipe through the pulp feeding hopper, and the flushing and stirring time is 4-6 minutes;

step A6, circularly stirring the slurry in the slurry storage area for 3-4 minutes through a slurry making pipeline mechanism;

step A7, carrying out stirring requirement detection on the performance of the slurry, and conveying the slurry meeting the requirement into a slurry storage area; the slurry which does not meet the requirement is continuously stirred until the detection is qualified;

step A8, repeat step A5 through step A7.

4. The pile foundation mud circulation and zero discharge system and method of claim 1, wherein said mud storage area comprises a plurality of mud storage tanks and a plurality of mud storage tanks, the plurality of mud storage tanks being arranged longitudinally in parallel with each other; the plurality of pulp storage tanks are longitudinally arranged on the right side of the pulp storage pool in parallel, one side of each pulp storage tank is provided with a water storage tank, and the water storage tanks are connected with the pulping area through water supply pipes;

the pulping area is positioned at the right lower end of the pulp storage pool, the discharge end of the pulping area is connected with a first pulp outlet pipeline, the first pulp outlet pipeline is connected with a plurality of first pulp outlet branch pipes, and first branch pipe control switches are connected in series in the first pulp outlet branch pipes; each pulp storage box is connected with a first pulp outlet branch pipe in a matching mode.

5. The pile foundation mud circulation and zero emission system and method according to claim 4, wherein there are three of said mud storage tanks, the mud storage tanks are square brick wall concrete tanks with openings at the upper part;

the number of the slurry storage tanks is seven, the slurry storage tanks are square steel tanks with openings at the upper parts, and the seven slurry storage tanks are respectively a first slurry storage tank, a second slurry storage tank, a third slurry storage tank, a fourth slurry storage tank, a fifth slurry storage tank, a sixth slurry storage tank and a seventh slurry storage tank;

the three pulp storage pools are named as a first pulp storage pool, a second pulp storage pool and a third pulp storage pool respectively, the first pulp storage pool is in adaptive connection with a first pulp storage box, a second pulp storage box and a third pulp storage box, the second pulp storage pool is in adaptive connection with a fourth pulp storage box, a fifth pulp storage box and a sixth pulp storage box, and the third pulp storage pool is in adaptive connection with a seventh pulp storage box; the second slurry storage tank and the third slurry storage tank are communicated with each other through a slurry communication pipeline, and a slurry tank communication pump is connected in series in the slurry communication pipeline;

and the waste slurry zero-emission treatment area conveys slurry processing filtrate to a first slurry storage tank through a recovered slurry pipe.

6. The pile foundation mud circulation and zero emission system and method according to claim 4, wherein a pool internal stirring mechanism is arranged in each of the mud storage pools, the pool internal stirring mechanism comprises a mud stirring pump, and the mud stirring pump is arranged at the corner of each of the mud storage pools;

the discharge end of the slurry stirring pump is connected with a slurry conveying stirring pipe, and the discharge port of the slurry conveying stirring pipe is positioned at the center of the slurry storage pool;

the slurry stirring pump sucks slurry at the end corner of the slurry storage tank, and the slurry is sprayed out of the slurry storage tank through the slurry conveying stirring pipe, so that the slurry continuously circulates in the slurry storage tank.

7. The pile foundation mud circulation and zero emission system and method of claim 5, wherein the pipe circulation zone comprises a first fresh mud delivery pipe and a second adjusted circulating mud delivery pipe, the first fresh mud delivery pipe being connected to the mud replacement zone and the second mud storage tank, and the second adjusted circulating mud delivery pipe being connected to the mud replacement zone and the first mud storage tank.

8. The pile foundation mud circulation and zero emission system and method according to claim 1, wherein the mud replacement zone comprises a finished product trough section tank, the finished product trough section tank is connected with a first mud separation and circulation mechanism, the first mud separation and circulation mechanism comprises a first mud separator, and the first mud separator is communicated with the finished product trough section tank through a first circulation mud feeding pipe and a first circulation mud discharging pipe to form a circulation loop;

the first circulation mud discharging pipe is connected with an emergency mud discharging pipe, and a first sand piling pool is arranged on one side of the first mud separator.

9. The pile foundation mud circulation and zero emission system and method according to claim 1, wherein the waste mud zero emission treatment zone comprises a second mud separator, a waste mud tank, a filter pressing system and a second sand piling tank, and the mud replacement zone is connected with the second mud separator through a second mud recycling pipe;

the circulating mud is subjected to primary screening treatment by a second mud separator, the recyclable mud is conveyed to a mud storage area through a recyclable mud pipe, and the waste mud is conveyed to a waste mud pool through a waste mud pipe;

the waste slurry tank is connected with the filter pressing system through a waste slurry tank pipeline, the waste slurry is subjected to secondary screening treatment through the filter pressing system, and the filter pressing system is connected with the second sand piling tank through a waste sand pipeline.

10. The pile foundation mud circulation and zero emission system and method of claim 1, wherein a steel structure walkway is connected above the plurality of mud storage tanks; and a protective tent is arranged above the pulp storage tank and the steel structure pedestrian passage.

Technical Field

The invention relates to the technical field of pile foundation construction, in particular to a pile foundation mud circulation and zero emission system and method.

Background

The wide application of the pile foundation also puts higher requirements on the construction of the pile foundation, and the slurry process is used as a key process of the construction of the pile foundation and has important influence on the safety, quality, progress and cost of the construction of the pile foundation. The mud is mainly prepared by mixing bentonite, water and an additive according to a certain proportion, and in the construction of a pile foundation, the mud mainly has the following functions: preventing the collapse of the groove wall, preventing slurry seepage, carrying slag to discharge slag, cooling and lubricating a drill bit (a grab bucket), stabilizing the water pressure in the groove and the like, and thus, the slurry process has the function of lifting the weight in the construction of the pile foundation. However, with the continuous improvement of project construction production, civilized construction and green construction requirements and standards, the conventional slurry process cannot well meet the development requirements of pile foundation construction, and the problems of low construction production efficiency, unstable construction indexes, easy environmental pollution, serious waste, high cost and the like exist. Aiming at the requirements and development requirements of pile foundation construction, the current application situation of the traditional slurry production process cannot meet the development of the pile foundation.

Disclosure of Invention

The invention aims to provide a pile foundation mud circulation and zero emission system and method, which can more stably, safely and efficiently process pile foundation mud, have high overall construction efficiency, reduce mud loss, reduce the using amount, reduce the material cost, promote construction management of a construction site, and effectively recycle and treat the mud.

In order to achieve the purpose, the invention adopts the technical scheme that:

the pile foundation mud circulation and zero emission system and method are characterized in that pile foundation mud circulation construction is carried out through a mud making area, a mud storage area, a pipeline circulation area, a mud replacement area and a waste mud zero emission treatment area, and the mud circulation construction process specifically comprises the following steps:

preparing a material for preparing slurry, and preparing the slurry required by construction in a slurry preparation area according to construction requirements by a slurry preparation method;

step two, detecting the slurry performance index of the slurry preparation area, transmitting the slurry meeting the detection requirement to a slurry storage area, storing the newly prepared slurry in the slurry storage area and collecting the slurry after construction circulation in other areas;

step three, the slurry in the slurry storage area enters a slurry replacement area through a pipeline circulation area;

step four, the slurry displacement area circularly screens the slurry, and sand grains and waste residue soil in the displacement area are screened out;

step five, the mud replacement area conveys the recycled mud to a waste mud zero-emission treatment area, and the recycled mud is subjected to primary screening treatment to obtain recyclable mud and waste mud;

and step six, the recyclable slurry is conveyed to a slurry storage area, the waste slurry is subjected to secondary screening treatment to obtain slurry processing filtrate and waste residue soil in a replacement area, and the waste residue soil in the replacement area are transported out of a construction site together.

Preferably, the pulping area comprises a pulping tank, and the pulping tank is connected with a pulping pipeline mechanism;

the pulping pipeline mechanism comprises a pulping circulating pipe and a pulping circulating pump, the pulping circulating pump is positioned in the pulping pool and is connected with the inlet end of the pulping circulating pipe, the pulping circulating pipe is connected with a pulp feeding hopper in series, the outlet end of the pulping circulating pipe is communicated with the pulping pool, and the pulping circulating pump sucks slurry in the pulping pool and discharges the slurry into the pulping pool through the pulping circulating pipe.

Preferably, the slurry preparation method adopts a slurry making pool and a slurry making pipeline mechanism, and specifically comprises the following steps:

step A1, preparing materials prepared from the slurry, wherein the materials comprise water, bentonite, CMC cellulose, soda ash and barite; adjusting the doping amount of the barite according to the density of the slurry;

step A2, according to the proportioning requirement of slurry preparation, firstly carrying out a raw material performance detection test;

a3, transporting slurry materials to one side of a pulping tank according to the material proportion after the raw material performance detection test;

step A4, introducing water into the pulping tank, and enabling the pulping circulating pump to work to enable the water in the pulping tank to circulate in the pulping pipeline mechanism and the pulping tank;

step A5, the bentonite enters a pulping circulation pipe through a pulp feeding hopper, and the flushing and stirring time is 4-6 minutes; CMC cellulose and soda ash enter the pulping circulation pipe through the pulp feeding hopper, and the flushing and stirring time is 4-6 minutes;

step A6, circularly stirring the slurry in the slurry storage area for 3-4 minutes through a slurry making pipeline mechanism;

step A7, carrying out stirring requirement detection on the performance of the slurry, and conveying the slurry meeting the requirement into a slurry storage area; the slurry which does not meet the requirement is continuously stirred until the detection is qualified;

step A8, repeat step A5 through step A7.

Preferably, the pulp storage area comprises a plurality of pulp storage pools and a plurality of pulp storage boxes, and the pulp storage pools are mutually parallel and longitudinally arranged; the plurality of pulp storage tanks are longitudinally arranged on the right side of the pulp storage pool in parallel, one side of each pulp storage tank is provided with a water storage tank, and the water storage tanks are connected with the pulping area through water supply pipes;

the pulping area is positioned at the right lower end of the pulp storage pool, the discharge end of the pulping area is connected with a first pulp outlet pipeline, the first pulp outlet pipeline is connected with a plurality of first pulp outlet branch pipes, and first branch pipe control switches are connected in series in the first pulp outlet branch pipes; each pulp storage box is connected with a first pulp outlet branch pipe in a matching mode.

Preferably, the number of the slurry storage tanks is three, and the slurry storage tanks are square brick wall concrete tanks with openings at the upper parts;

the number of the slurry storage tanks is seven, the slurry storage tanks are square steel tanks with openings at the upper parts, and the seven slurry storage tanks are respectively a first slurry storage tank, a second slurry storage tank, a third slurry storage tank, a fourth slurry storage tank, a fifth slurry storage tank, a sixth slurry storage tank and a seventh slurry storage tank;

the three pulp storage pools are named as a first pulp storage pool, a second pulp storage pool and a third pulp storage pool respectively, the first pulp storage pool is in adaptive connection with a first pulp storage box, a second pulp storage box and a third pulp storage box, the second pulp storage pool is in adaptive connection with a fourth pulp storage box, a fifth pulp storage box and a sixth pulp storage box, and the third pulp storage pool is in adaptive connection with a seventh pulp storage box; the second slurry storage tank and the third slurry storage tank are communicated with each other through a slurry communication pipeline, and a slurry tank communication pump is connected in series in the slurry communication pipeline;

and the waste slurry zero-emission treatment area conveys slurry processing filtrate to a first slurry storage tank through a recovered slurry pipe.

Preferably, the slurry storage tanks are internally provided with an internal stirring mechanism which comprises a slurry stirring pump, and the slurry stirring pump is arranged at the end corner of the slurry storage tank;

the discharge end of the slurry stirring pump is connected with a slurry conveying stirring pipe, and the discharge port of the slurry conveying stirring pipe is positioned at the center of the slurry storage pool;

the slurry stirring pump sucks slurry at the end corner of the slurry storage tank, and the slurry is sprayed out of the slurry storage tank through the slurry conveying stirring pipe, so that the slurry continuously circulates in the slurry storage tank.

Preferably, the pipeline circulation area comprises a first new slurry conveying pipe and a second adjusted circulating slurry conveying pipe, the first new slurry conveying pipe is connected with the slurry replacement area and the second slurry storage tank, and the second adjusted circulating slurry conveying pipe is connected with the slurry replacement area and the first slurry storage tank.

Preferably, the slurry replacement area comprises a finished product groove section pool, the finished product groove section pool is connected with a first slurry separation and circulation mechanism, the first slurry separation and circulation mechanism comprises a first slurry separator, and the first slurry separator is communicated with the finished product groove section pool through a first circulating slurry feeding pipe and a first circulating slurry discharging pipe to form a circulation loop;

the first circulation mud discharging pipe is connected with an emergency mud discharging pipe, and a first sand piling pool is arranged on one side of the first mud separator.

Preferably, the waste slurry zero-emission treatment area comprises a second slurry separator, a waste slurry pool, a filter pressing system and a second sand piling pool, and the slurry displacement area is connected with the second slurry separator through a second slurry recycling circulating pipe;

the circulating mud is subjected to primary screening treatment by a second mud separator, the recyclable mud is conveyed to a mud storage area through a recyclable mud pipe, and the waste mud is conveyed to a waste mud pool through a waste mud pipe;

the waste slurry tank is connected with the filter pressing system through a waste slurry tank pipeline, the waste slurry is subjected to secondary screening treatment through the filter pressing system, and the filter pressing system is connected with the second sand piling tank through a waste sand pipeline.

Preferably, steel structure pedestrian passages are connected above the plurality of pulp storage tanks; and a protective tent is arranged above the pulp storage tank and the steel structure pedestrian passage.

The invention has the beneficial effects that:

the system and the method carry out systematic research on the preparation of the slurry, mainly standardize the preparation and production of the slurry, utilize pipelines to carry out slurry circulation, separate and recycle the slurry and realize zero emission. The application of the slurry preparation system well optimizes the slurry preparation process, improves the construction quality of the pile foundation, makes up for the defects in the traditional slurry process, and brings considerable economic and social benefits to production management. After the system is used, the used slurry can be better prepared, the construction quality and safety of the pile foundation are ensured, the secondary investment of slurry preparation is reduced, and the engineering cost is integrally controlled. After the slurry is used, the stability of the (hole) groove wall is ensured, the collapse of the (hole) groove wall is reduced, the concrete pouring amount is effectively controlled, and the construction material cost is saved. After the slurry preparation system is applied, the construction progress is ensured, a large amount of manpower and machinery are reduced, and the cost is reduced; the slurry loss is reduced, the use amount is reduced, and the material cost is reduced; the method promotes the construction management of the construction site civilization, realizes zero discharge of the slurry, reduces pollution and is beneficial to environmental protection.

Drawings

In order to clearly illustrate the embodiments or technical solutions of the present invention in the prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a block flow diagram of a pile foundation mud circulation and zero emission system and method.

Fig. 2 is a schematic diagram of the overall structure and layout of a pile foundation mud circulation and zero emission system.

FIG. 3 is a schematic view of the structural positions of the pulping zone, the pulp storage zone and the pipe circulation zone.

FIG. 4 is a schematic illustration of the structural location of the mud displacement zone.

FIG. 5 is a schematic view of the structural location of the pulping section.

Detailed Description

The invention provides a pile foundation mud circulation and zero emission system and method, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention is described in detail below with reference to the accompanying drawings:

example 1

With reference to fig. 1 to 5, a pile foundation mud circulation and zero discharge system and method performs pile foundation mud circulation construction through a mud making zone 1, a mud storage zone 2, a pipeline circulation zone 3, a mud replacement zone 4 and a waste mud zero discharge treatment zone 5, wherein the mud circulation construction process specifically comprises the following steps:

preparing a material for preparing slurry, and preparing the slurry required by construction in a slurry preparation area 1 according to construction requirements by a slurry preparation method;

step two, detecting the performance index of the slurry in the slurry preparation area 1, transmitting the slurry meeting the detection requirement to the slurry storage area 2, and storing newly prepared slurry and collecting slurry after construction circulation in other areas in the slurry storage area 2;

thirdly, the slurry in the slurry storage area 2 enters a slurry replacement area 4 through a pipeline circulation area 3;

step four, the slurry displacement area 4 circularly screens the slurry to screen sand grains and displacement area waste residue soil;

step five, the slurry replacement area 4 conveys the recycled circulating slurry to a waste slurry zero-emission treatment area 5, and the circulating slurry is subjected to primary screening treatment to obtain recyclable slurry and waste slurry;

and step six, the recyclable slurry is conveyed to a slurry storage area, the waste slurry is subjected to secondary screening treatment to obtain slurry processing filtrate and waste residue soil in a replacement area, and the waste residue soil in the replacement area are transported out of a construction site together.

The pulping area 1 comprises a pulping tank 11, and the pulping tank 11 is connected with a pulping pipeline mechanism. The pulping pipeline mechanism comprises a pulping circulating pipe 12 and a pulping circulating pump 13, and the pulping circulating pump 13 is positioned in the pulping tank 11 and is connected with the inlet end of the pulping circulating pipe 12. The pulping circulating pipe 13 is connected in series with a pulp feeding hopper 14, the outlet end of the pulping circulating pipe 13 is communicated with the pulping tank 11, and the pulping circulating pump 13 sucks the slurry in the pulping tank 11 and discharges the slurry into the pulping tank through the pulping circulating pipe 13.

Example 2

With reference to fig. 1 to 5, in the pile foundation slurry circulation and zero discharge system and method of the present invention, a slurry preparation method is used for pulping during pulping.

The slurry preparation method adopts a slurry making pool and a slurry making pipeline mechanism, and specifically comprises the following steps:

step A1, preparing materials prepared from the slurry, wherein the materials comprise water, bentonite, CMC cellulose, soda ash and barite; adjusting the doping amount of the barite according to the density of the slurry; the engineering slurry has the mixing ratio of water 87.4%, bentonite 12%, alkali 0.5% and cellulose 0.1%. In order to increase the density of the slurry, the doping amount of the barite is adjusted according to the density of the slurry. And (4) trial-matching the slurry before construction, and adjusting according to trial-matching results. And (4) after the mixing proportion is determined, preparing fresh slurry by using a slurry stirrer.

Step A2, according to the proportioning requirement of slurry preparation, firstly carrying out a raw material performance detection test;

a3, transporting slurry materials to one side of a pulping tank according to the material proportion after the raw material performance detection test;

step A4, introducing water into the pulping tank, and enabling the pulping circulating pump to work to enable the water in the pulping tank to circulate in the pulping pipeline mechanism and the pulping tank;

step A5, the bentonite enters a pulping circulation pipe through a pulp feeding hopper, and the flushing and stirring time is 4-6 minutes; CMC cellulose and soda ash enter the pulping circulation pipe through the pulp feeding hopper, and the flushing and stirring time is 4-6 minutes;

step A6, circularly stirring the slurry in the slurry storage area for 3-4 minutes through a slurry making pipeline mechanism;

step A7, carrying out stirring requirement detection on the performance of the slurry, and conveying the slurry meeting the requirement into a slurry storage area; the slurry which does not meet the requirement is continuously stirred until the detection is qualified;

step A8, repeat step A5 through step A7.

The performance indexes of the prepared slurry are as follows:

new mud performance index

Index for controlling circulating slurry

Example 3

With reference to fig. 1 to 5, the pile foundation mud circulation and zero emission system and method provided by the invention adopt a novel mud storage area 2, a pipeline circulation area 3, a mud replacement area 4 and a waste mud zero emission treatment area 5, and are reasonable in layout and convenient to construct.

The pulp storage area 2 comprises a plurality of pulp storage pools 21 and a plurality of pulp storage boxes 22, and the pulp storage pools 21 are mutually parallel and longitudinally arranged; the plurality of pulp storage tanks 22 are longitudinally arranged on the right side of the plurality of pulp storage tanks 21 in parallel, one side of each pulp storage tank 22 is provided with a water storage tank 23, and the water storage tanks 23 are connected with the pulping area 1 through water supply pipes.

The pulping area 1 is positioned at the right lower end of the pulp storage tank 21, the discharge end of the pulping area 1 is connected with a first pulp outlet pipeline 15, the first pulp outlet pipeline 15 is connected with a plurality of first pulp outlet branch pipes 16, and first branch pipe control switches 17 are connected in series in the first pulp outlet branch pipes 16; each of the slurry tanks 22 is adapted to be connected to one of the first slurry outlet branches 16.

The number of the slurry storage tanks 21 is three, and the slurry storage tanks 21 are square brick wall concrete tanks with openings at the upper parts.

The number of the slurry storage tanks 22 is seven, the slurry storage tanks 22 are square steel tanks with openings at the upper parts, and the seven slurry storage tanks 22 are named as a first slurry storage tank, a second slurry storage tank, a third slurry storage tank, a fourth slurry storage tank, a fifth slurry storage tank, a sixth slurry storage tank and a seventh slurry storage tank respectively. Steel structure pedestrian passageways 222 are connected above the plurality of pulp storage tanks 22; a protective tent 223 is arranged above the pulp storage tank 22 and the steel structure pedestrian passageway 222.

Three mud storage ponds 21 are named as first mud storage pond 211, second mud storage pond 212 and third mud storage pond 213 respectively, first mud storage pond 211 adaptation is connected first mud storage tank to third mud storage tank, second mud storage pond 212 adaptation is connected fourth mud storage tank to sixth mud storage tank, third mud storage pond 213 adaptation seventh mud storage tank, second mud storage pond 212 and third mud storage pond 213 communicate each other through mud intercommunication pipeline 24, the interior concatenation of mud intercommunication pipeline 24 has mud pond intercommunication pump 25.

The zero discharge treatment zone 5 for waste sludge transfers the sludge processing filtrate to the first sludge storage tank through the recovered sludge pipe 221. The slurry storage tanks 21 are internally provided with an in-tank stirring mechanism which comprises slurry stirring pumps 26, and the slurry stirring pumps 26 are arranged at the end corners of the slurry storage tanks 21; the discharge end of the slurry stirring pump 26 is connected with a slurry conveying stirring pipe 27, and the discharge port of the slurry conveying stirring pipe 27 is positioned at the center of the slurry storage tank 21. During operation, the slurry stirring pump 26 sucks slurry at the end corner of the slurry storage tank 21, and then the slurry is sprayed out from the center of the slurry storage tank 21 through the slurry conveying stirring pipe 27, so that the processed slurry continuously circulates in the slurry storage tank, and the slurry is always in a circulating stirring state.

The pipe circulation zone 3 comprises a first fresh slurry delivery pipe 31 and a second adjusted circulating slurry delivery pipe 32, the first fresh slurry delivery pipe 31 is connected with the slurry displacement zone 4 and the second slurry storage tank 212, and the second adjusted circulating slurry delivery pipe 32 is connected with the slurry displacement zone 4 and the first slurry storage tank 211.

The slurry replacement zone 4 comprises a finished product tank section pool 41, the finished product tank section pool 41 is connected with a first slurry separation and circulation mechanism, the first slurry separation and circulation mechanism comprises a first slurry separator 42, and the first slurry separator 42 is communicated with the finished product tank section pool 41 through a first circulating slurry feeding pipe 43 and a first circulating slurry discharging pipe 44 and forms a circulation loop. The first circulating sludge discharge pipe 43 is connected to an emergency sludge discharge pipe 45. The first circulating slurry feeding pipe 43, the first circulating slurry discharging pipe 44 and the emergency slurry discharging pipe 45 are all provided with pipeline switching valves. The emergency mud pipe 45 can discharge mud material and waste slag, and a first sand basin 46 is provided at one side of the first mud separator 42. For the slurry in the slurry displacement zone, the first slurry separator 42 displaces the slurry in the finishing tank 41 by a pumping method, and the displaced slurry is recycled by the slurry separator.

The waste slurry zero-emission treatment area 5 comprises a second slurry separator 51, a waste slurry pool 52, a pressure filtration system 53 and a second sand piling pool 54, and the slurry replacement area 4 is connected with the second slurry separator 51 through a second slurry recycling circulating pipe 55.

The recycled sludge is subjected to a first stage screening process in a second sludge separator 51, the recyclable sludge is transported to the sludge storage area 2 through a recyclable sludge pipe 511, and the waste sludge is transported to a waste sludge tank 52 through a waste sludge pipe 512. The waste slurry tank 52 is connected with the filter pressing system 53 through a waste slurry tank pipeline 521, the waste slurry is subjected to secondary screening treatment through the filter pressing system, and the filter pressing system 53 is connected with the second sand piling tank 54 through a waste sand pipeline 531. The waste slurry is treated by the filter pressing system to realize zero discharge of liquid waste slurry, so that the method is energy-saving and environment-friendly, saves cost and can effectively control the construction quality of the slurry.

Example 4

In the process of preparing the slurry, the slurry is mixed with the water,

in the construction process, the mud of each construction link is detected, the construction quality of the mud is ensured, and the specific detection frequency is shown in the following table:

time, position and test items for slurry inspection

The system for preparing the slurry is successfully applied to underground diaphragm wall engineering (including cast-in-place piles) of station north stations for transferring subway No. 3 and No. 6 lines in a certain urban area and underground diaphragm wall engineering (including cast-in-place piles) of foundation pits and pile foundation engineering in the first period of a headquarters of an enterprise in a certain urban area.

The input of the slurry circulating system is to perform systematic, standardized and specialized management on the slurry preparation process, so that the whole process control of slurry preparation and use is facilitated, the quality of the pile foundation slurry construction process can be effectively controlled, and the zero emission of liquid waste slurry is finally realized. The system does not increase new environmental influence factors, can play a positive role in green construction and civilized construction to engineering construction, and also has a promoting effect on improving the brand image of a company. In the practical process of construction in the future, the system is continuously innovated and optimized, so that the system can meet the standard and development form of pile foundation construction and play an important role in the field of pile foundation construction

Example 5

A pile foundation mud circulation and zero emission system and method comprises a mud processing construction process, wherein the mud processing construction process specifically comprises the following steps:

step one, preparing a material for preparing slurry, and preparing the slurry required by construction in a slurry preparation area according to construction requirements by a slurry preparation method.

And step two, detecting the slurry performance index of the slurry preparation area, transmitting the slurry meeting the detection requirement to the slurry storage area, storing the newly prepared slurry in the slurry storage area and collecting the slurry after construction circulation in other areas.

And step three, the slurry in the slurry storage area enters a slurry replacement area through the pipeline circulation area.

And step four, circularly screening the slurry in the slurry displacement area to obtain sand grains and waste residue soil in the displacement area.

And step five, conveying the recycled circulating slurry to a waste slurry zero-emission treatment area by the slurry replacement area, and obtaining recyclable slurry and waste slurry by first-stage screening treatment of the circulating slurry.

And step six, the recyclable slurry is conveyed to a slurry storage area, the waste slurry is subjected to secondary screening treatment to obtain slurry processing filtrate and waste residue soil in a replacement area, and the waste residue soil in the replacement area are transported out of a construction site together.

By using the construction method, the mud used for pile foundation construction can be processed more quickly and stably; the slurry can better ensure the construction quality and safety of the pile foundation, reduce secondary investment and integrally control the engineering cost. Can ensure the stability of the (hole) groove wall, reduce the collapse of the (hole) groove wall, effectively control the concrete pouring amount and save the construction material cost. The progress is guaranteed, a large amount of manpower and machines are reduced, and the cost is reduced. The slurry loss is reduced, the use amount is reduced, and the material cost is reduced; the method promotes the construction management of the construction site civilization, realizes zero discharge of the slurry, reduces pollution and is beneficial to environmental protection.

The construction project of the underground continuous wall constructed by adopting the hydraulic grab bucket is suitable for the system and the method; the system and the method are suitable for being adopted in some deep foundation pit projects, such as cast-in-place piles and the like, under the conditions of large mud construction engineering quantity and high requirements. The system and the method are suitable for pile foundation construction engineering which cannot adopt original soil for slurry making.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.