The act of inspection of sewer wells sample. Filling out an act of hidden work in the sewer

Object of construction survey: Sewerage system of a residential building and system central sewerage.

Address of the examination: Belgorod

The purpose of the survey: to answer the questions posed in the ruling of the court in the case:

What are the causes of flooding ground floor residential building:

• blockage of the sewer network (central sewer)
• violations of SNiP in the design and construction of a sewerage system for a residential building;
• other reasons?

Description of the object: The object is a cottage-type residential building with an organized yard sewerage network. The lower mark of the basement floor affected by the flood is -3150 mm from the ground level. The sewer network has a slope of 0.008 and consists of three sections, the beginning and end of which is limited by manholes: from K-16 to K-17 with a length of 10 m, from K-17 to K-18 with a length of 36.5 m and from K-18 to tie-ins into the central collector of the well K b\n of the street network, 35.0 m long. Diameter sewer pipes yard network 150 mm. The wells of the yard sewerage, on the site of the house, 1800 mm high, are made of concrete rings, the design and execution comply with regulatory documents.

DIAGNOSTIC EXAMINATION

During the examination, the following were examined: the home cinema room, as well as all three manholes of the yard network and four wells of the street.

Construction Expert Evaluation

Depending on the number of defects and the degree of damage, the technical condition building structures is evaluated in the following categories (see Chapter 3 "Terms and definitions" SP 13-102-2003).

Expert assessment of the technical condition of the structure - limited workability.

Offset of structural elements, i.e. floor slab with a neck is displaced with respect to working chamber, violates GOST 8020-90 CONCRETE AND REINFORCED CONCRETE STRUCTURES FOR WELLS OF SEWER, WATER SUPPLY AND GAS NETWORKS:

The central collector has a limited capacity due to the presence of objects that can lead to clogging, silting of pipes, which is a consequence of the low level of maintenance of the sewer network.

According to the Decree of the GOVERNMENT of the RUSSIAN FEDERATION dated February 12, 1999 N 167 "On approval of the Rules for the use of public water supply and sewerage systems in Russian Federation» (as amended on May 23, 2006):

The organization of water supply and sewerage facilities is obliged to:

• ensure the proper operation and functioning of water supply and sewerage systems in accordance with the requirements of regulatory and technical documentation and the contract concluded between the owner of these systems and the water supply and sewerage organization;
• issue to the subscriber (customer) specifications for connection to water supply and sewerage systems;
• conclude with a subscriber (customer) a contract for vacation (receipt) drinking water and receive (reset) Wastewater taking into account the possibility of water supply and sewerage systems;
• ensure the fulfillment of the terms of the contract with the subscriber and the requirements of these Rules;
• participate in the acceptance into operation of devices and structures for connection to water supply and sewerage systems and metering stations;
• take measures to reduce leaks, losses and irrational use of drinking water;
• carry out industrial laboratory quality control of drinking water and wastewater discharged into water bodies;
• take measures to prevent unauthorized connection to water supply and sewerage systems and unauthorized use of them;
• warn subscribers, local governments and relevant state supervision bodies about the termination (restriction) of the supply of drinking water and the reception (discharge) of wastewater in the manner and cases provided for by these Rules;
• accept necessary measures on the timely elimination of accidents and damages on water supply (sewerage) systems in the manner and terms established by the regulatory and technical documentation, and the resumption of the operation of systems in compliance with sanitary regulations and norms; ......

The subscriber has the right:

• …….demand compensation for losses incurred through the fault of the water supply and sewerage organization;

The water supply and sewerage organization and the subscriber are responsible for:

• for failure to fulfill contractual obligations in accordance with the legislation of the Russian Federation and these Rules;
• for damage caused by leaks of drinking water (sewage) from water supply (sewage) systems owned by them, economic management or rent.

The water supply and sewerage organization is responsible for:

• for damage caused to the subscriber;
• for the quality of drinking water supplied and its compliance with sanitary standards and rules.

The subscriber is responsible:

• for damage caused to a water supply and sewerage organization or to public water supply and sewerage systems, in accordance with the legislation of the Russian Federation;
• for the quality of wastewater discharged into centralized system public sewerage, which must comply with established standards;
• for the reliability of information on the accounting of drinking water received and discharged wastewater and pollutants.

Persons guilty of unauthorized connection to public water supply and sewerage systems and damage to these systems, which may endanger the life and health of the population, are liable in accordance with the legislation of the Russian Federation.

Conclusions of the construction expert:

• The surveyed system of intra-yard sewerage on the site of the house is in working condition, the passage of sewage to the prefabricated central sewer of the village is provided with a very large margin.
• The traces of a short-term rise in water in the well found on the walls of the wells of the intra-yard sewerage can only be from flooding as a result of the rise in the wells of the prefabricated central collector of the village, where the intra-yard sewerage of the house is connected.
• According to the project, the depth of the floor of the basement of the house is 3.2 m, while the level of the bottom of the intra-yard sewerage well is 1.8 m.
• With this in mind, with even a slight increase in the water level in the well of the intra-yard sewerage, a reverse flow of water occurs, which leads to flooding of the basement of the house. To combat this phenomenon, the installation check valve which is not included in the project.
• When examining the wells of the central collector, violations of GOST were recorded in terms of the execution of wells and SNiP in terms of the quality of their installation.
• When examining the wells of the central collector, the presence of foreign objects and backwater was recorded, causing a rise in the water level in the wells, which can cause flooding of the basement of the village houses.

In order to avoid repeated flooding of consumers, experts recommend:

• all consumers to install automatic shut-off valves that operate when the liquid level rises and shut off in an emergency the access of sewage from the street network.

• Federal State Unitary Enterprise "Rublyovo-Uspensky LOK", responsible for the maintenance street system sewerage in good condition, organize work in accordance with the Decree of the GOVERNMENT OF THE RUSSIAN FEDERATION dated February 12, 1999 N 167 "On approval of the Rules for the use of public water supply and sewerage systems in the Russian Federation" and others normative documents, strictly observe the system of preventive maintenance of networks.

Conclusion of a construction expert

During the diagnostic survey, the experts were not presented with the design documentation of the entire sewer network, as a result of which there is no information on the presence and classification of industrial and administrative buildings connected to this network. Perform Compliance Calculations bandwidth the existing collector with a diameter of 200 mm from all consumers in this case is not possible, as a result of which the analysis of design solutions in this part was not carried out. However, given the presence of the basement of the house at a mark below the level of the bottom of the well, it was necessary to provide for the installation of a check valve, which in the presented design decisions not found. Wells (central sewerage) are made with violations of the existing SNiP and GOST. The wastewater consumption of the connected yard network of the house, to the street network, laid according to the existing project, is extremely insignificant (0.41 l / s). In view of this, this could not lead to overflow of the collector and a rise in the level of wastewater, which created a liquid backwater and caused flooding of the wells in the network. Technical condition the yard sewerage system is assessed as serviceable. The technical condition of the sewerage system of the street network is assessed as limited operable. The reason for the flooding of the basement floor of a residential building could only be a blockage of the central collector in the area located below the tie-in of the yard network into it along the flow of wastewater (in the project documentation submitted to the experts, the sections and wells of the street network are not numbered), including at the security post . It should be noted that this became possible also due to the absence of a non-return valve at the connection point, which was not provided for by the project. internal sewerage houses to the internal sewerage. SNiP 2.04.01-85* Internal plumbing and sewerage of buildings:

“17.27. Sanitary appliances, the sides of which are located below the hatch level of the nearest manhole, must be connected to separate system sewerage system (isolated from the sewerage system of the upstream premises) with a separate outlet device and the installation of a valve with an electrified drive on it, controlled automatically by a signal from a sensor installed on the pipeline in the canalized basement, and sending an emergency signal to the duty room or to the control room.

I-1.11-2012. Form 11

ACT OF INSPECTION OF SEWER FROM PIPES BEFORE CLOSING

№_______________

Once pressureless sewer system and plumbing are fully installed and tested for sealing by the method of spilling the system, it is also necessary to examine the communication before closing the entire system. Such work is called hidden and is carried out inside the sewer network. A documented survey is certified through an inspection report of the sewer from the pipes before closing.

Such a test (research) is carried out for external pipelines of water supply and free-flow sewerage in order to identify the slightest defects that can ultimately lead to depressurization of the sewerage and subsequent environmental disaster on a district / city / region scale.

Important: a sewerage / water supply inspection for the purpose of its final commissioning must be carried out as part of a full commission. About who should participate in the examination and how exactly the inspection report is filled out sewer networks, in our material below.

For a detailed explanation, a sample form of the act of inspecting the sewage system after a powerful pipeline spill to identify violations in the sealing of the system is attached.

Stages of filling out the act

The form of the document must be filled out strictly according to the form without deviations from the standards. Only in this case the document will be considered valid.

The heading of the document on sealing the non-pressure sewage network must be filled in in accordance with the available columns. That is, information is entered about the city in which the examination of external and internal networks collector, the name of the ministry and the trust, the name of the organization of the customer and the contractor (the latter is fully responsible for the tightness of the collector). Also, in the header of the study document, it is worth indicating the date of the inspection of sewer networks before putting them into operation.

Important: a covert inspection of the tightness of the pipeline is carried out only after testing the system by the spill method.

Further completion of the act

Following the header, data on the members of the commission participating in the examination of the integrity of non-pressure communication are entered into the research (test) document. Here it is necessary to indicate the positions of each of the members of the commission, as well as their initials and surnames.

Members of the committee should be:

• Representative from the customer organization;
• A person representing the contracting organization;
• Representative state organization from Rostekhnadzor.

All persons listed in the document must put their signatures.

After the data on the members of the commission are indicated, it is necessary to enter reliable information about the properties and features of the sewer network at the time of the work. The information is taken from the project documentation and entered into the paper without any distortion.

Important data are:

• The total length of the pipeline;
• The material from which the internal and external pipelines are laid;
• Place of installation of the sewer system.

The next section of the act is the "Result of the inspection", divided into paragraphs.

• In paragraph 1, information is entered that a visual inspection of the sewer pipes confirms / does not confirm (select the right one) the compliance of the installation of the collector pipes with the existing drawing number such and such. The drawing number is taken from the design documentation.
• In paragraph 2, enter data on the absence or presence of deviations of the installed system from the available design drawings as a result of installation and after testing the collector by the strait method. If there are deviations after the trial work, it is necessary to indicate with whom the actions to change the design of sewer networks were agreed and the number of the new drawing, according to which the changes were made to the communication project.
• Paragraph 3 contains data on the method of connecting sewer pipes in single system between themselves and wells.
• In paragraph 4, it is necessary to indicate data on the results obtained after the inspection. If the system and all wells do not have any damage and visible defects, then information is entered in the study form that the sewer system has an optimal bending radius of the pipeline in the right places. Also, the absence of dents, creases, damage and leaks in the pipeline and wells was not noted.

Conclusion of the act

In conclusion, a special commission gives written permission for the closure of the system and its commissioning after a study by the strait method and a final inspection. It also indicates that the entire internal collector during installation was erected in accordance with the design documentation and building codes without any violations during installation.

The act of research is signed by all members of the commission.

Important: before inspecting the sewer pipes, you must perform the following steps:

• Wait until the water is drained from the communication and it dries completely;
• Remove possible construction or natural debris from the collector so that nothing interferes with the inspection;
• Wear protective helmets to avoid injury in the network;
• Ensure sufficient lighting in the sewer pipe network.

Management company ______________________________ HOA _______

as of ___________________________________________

I.General information

1. Year of construction ___________________________________________

2. Depth of laying ______________________________________ m..

3. The length of the yard water supply _____________________m.

(type, brand of pipe, diameter)

5. Type of insulation of water pipes __________________________

6. Water wells __________________________________________________ pcs.

(indicate in which soils, round, rectangular, brick, prefabricated diameter)

7. The length of the yard sewerage _____________________m.

(type, brand of pipe, diameter)

9. Sewer wells ________________________________________________________________ pcs.

(indicate in which soils, round, rectangular, diameter, prefabricated, monolithic)

We, the undersigned_____________________________________________

______________________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________________________________________________________________________________________

(position, whose representative, full name)

Inspection was carried out and the following defects were found:

Pipelines fell into disrepair shut-off valves needs to be replaced, etc.________________________________________________________________________________________________________________________________________________________________________________________________________________

III. Technical conclusion

1. WATER NETWORK

1. a) it is required to replace water pipelines from a / cement pipes with

connection on asbestos couplings______________________________ m.

b) the same on cast-iron couplings _____________________________ m.

c) the same from cast iron pipes socketed resin

strand _____________________________________________________________ m.

(specify diameter)

(specify diameter)

pipes _____________________________________________________________ m.

(indicate the diameter, brand of pipes)

2. a) install steel fittings _____________________________t.

b) install cast iron fittings _____________________________t.

(angles of rotation, tees)

c) install polyethylene fittings _____________________ pcs.

3.

(normal, enhanced, very enhanced)

(normal, enhanced, very enhanced)

4. a) install new steel valves ______ pcs. brand ________________

b) the same cast iron _______ pcs. brand _________________________________

5.

6. a) arrange prefabricated water wells w / w ____________________ m3.

b) the same brick _____________________________________________ m3.

(round, rectangular, ground type)

c) the same concrete _______________________________________________ m3.

(round, rectangular, ground type)

7. shift the necks at brick wells _________________ wells

8. install new cast-iron hatches _________________________________ pcs.

(specify hatch type)

9. etc.____________________________________________________________

2. SEWER NETWORK

1. arrange a foundation for the pipeline ______________________________ m3.

(specify sand, crushed stone, gravel, concrete)

2. a) it is required to replace sewer pipelines from a / cement pipes with a connection on asbestos couplings _________________________________ m.

(indicate the diameter, type of pipes VT-6, VT-9, VT-12)

b) the same on cast-iron couplings _____________________________ m.

(specify diameter, VT-9, VT-12)

c) the same from cast-iron pipes with sockets sealed with a resin strand _______m.

(specify diameter)

d) the same with sealing rubber seals_________ m.

(specify diameter)

e) it is required to replace pipelines made of steel

pipes _____________________________________________________________ m.

(indicate the diameter, brand of pipes with hydraulic, pneumatic testing)

f) it is required to replace pipelines made of polyethylene

pipes _____________________________________________________________ m.

(indicate the diameter, brand of pipes)

3. a) install steel fittings _____________________________t.

(angles, tees, flanges)

b) install cast-iron fittings ____________________________ t.

(angles of rotation, tees)

c) install polyethylene fittings _____________________ pcs.

(branches, branch pipes, transitions, tees, crosses)

4. a) make anti-corrosion insulation steel pipes _____________ m.

(normal, enhanced, very enhanced)

b) make anti-corrosion insulation of steel fittings

pipelines ________________________________________________ m.

(normal, enhanced, very enhanced)

5. a) install new steel valves _______ pcs. Brand______

b) the same cast iron ________________ pcs. brand ________________

6. a) cut into an existing network of steel pipes _______ tie-ins

b) the same from cast-iron pipes ____________________________ tie-ins

7. a) arrange prefabricated reinforced concrete sewer wells with a diameter of 1 meter __ m3.

(round, rectangular, ground type)

(round, rectangular, ground type)

(round, rectangular, ground type)

8. a) arrange brick sewer wells with a diameter

1 meter _____________________________________________________________ m3.

(round, rectangular, ground type)

b) the same with a diameter of 1.5 meters _____________________________________ m3.

(round, rectangular, ground type)

c) the same with a diameter of 2 meters _____________________________________ m3.

(round, rectangular, ground type)

9. a) arrange monolithic concrete sewer wells with a diameter

1 meter ____________________________________________________________ m3.

(round, rectangular, ground type)

b) the same with a diameter of 1.5 meters _____________________________________ m3.

(round, rectangular, ground type)

c) the same with a diameter of 2 meters _______________________________________ m3.

(round, rectangular, ground type)

10. shift the necks at brick wells ________________ wells

(indicate the number of rows of shifting)

11. install new cast-iron hatches ________________________________ pcs.

(specify hatch type) 12. change of cast-iron hatch _______________________________________ pcs.

(specify brand)

13. etc.___________________________________________________________

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Signatures: __________________________________ / surname/

surname/

___________________________________ /surname/

___________________________________ /surname/

Annex: Plan of the territory indicating the repaired section of the water or sewer yard network.