METHOD STATEMENT FOR PRE CONSRUCTION TERMITE CONTROL TREATMENT

 

PRE CONSTRUCTION SOIL TREATMENT

 

Pre Construction Soil Treatment implies laying down a chemical barrier to prevent termites from getting back and forth between wood and soil. Termites need wood for food and soil for moisture, so they constantly travel back and forth between wood and soil. Where this situation does not exist, termites build the “shelter tubes” (Mud tubes) to span foundation walls and other parts of the building that separate wood from the soil. Besides building the tubes in and over foundation walls, termites may also build them inside the walls if constructed of concrete blocks or other porous material. In the case of slab buildings, termites enter through expansion joints, cracks, opening for utility and service connections.

 

1.0     SCOPE OF WORK

 

Anti termite treatment which will be covered ground covered by Ground floor slabs.

                                                                                   

2.0              EXECUTION & SEQUENCE OF WORK.

 

ü  Once the backfilling is completed and prior to lay the leveling screed of ground floor slab, 350mm-400mm depth holes will be done along the edge of beams and on entire slab area at 750mm-900mm intervals.

 

ü  Then the termiticide will be injected by means of pressure injection treatment under high pressure (approximately PSI 250-290) at the rate of 1.5ℓ to 2ℓ per hole

 

ü  In addition to the above treatment blanket spraying will be carried out on soil surface covered by the leveling screed of ground slab. For this a pressure gun will be used to ensure the penetration of the termiticide solution to the soil and thereby to soak the soil the termiticide will be sprayed at the rate of 2ℓ to 2.5ℓ of the adequate solution per square meter.

 

ü  Anti-termite treatment will not be done under the base slab of sump, lifts and etc. which are in below the water table.

 

 

 

 

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3.0              CHEMICAL USED.

 

The chemical used will be BIFENTHRIN based termiticide (bifenthrin emulsifyable EC-10) which is an environmentally friendly which is approved by the Registrar of Pesticide who is the authority of regulating the pesticide usage in Sri Lanka.

 

 

4.0              SAFETY & QUALITY ASSURANCE

 

ü  Safety Shoes/ Boots, Safety Helmet, Gloves, and masks will be used by the workers. Workers who are working in treated areas for tailing works will wear foot protections and hand gloves.

 

ü  Technical officers from specialist contractor will supervise the work and approval for chemical treatment will be taken from the engineer in area by area. Treated area will be covered with polytheen till lay the leveling screed.

 

ü  Once the Contractors’ Engineer and the QA/QC Engineer carried out the inspection, Consultant’s representative will carry out his inspection along with the Contractors’ QA/QC Engineer and make the final approval to precede the work

 

 

 

5.0              WARRANTY (From specialist contractor)

 

ü  Pre Construction Termite proofing treatment is backed by a 10 years warranty. In the unlikely event of appearance of termites during the warranty period, we will carry out the necessary treatment to free your premises of termites without extra charges.

 

ü  A warranty certificate will be issued for treated building units in the premises.

 

METHOD STATEMENT FOR SHORING WORK

 

1.0 INTRODUCTION

This document outlines the work methods / different stages involved for the safe and proper execution of shoring for lift pit, harvesting tank and water sump.

2.0  SCOPE OF WORK

This method statement gives a step by step procedure for shoring.

1.      Excavation

2.      Dewatering

3.      Shoring procedure

 

3.0  REFERENCES AND STANDARDS

Drawings and the specifications

 

4.0  MATERIAL AND EQUIPMENT

 

4.1     List of Materials

1.            Steel Sheets

2.            Timber planks

3.            2” thick timber

4.            Steel H section / I section

5.            Pipes and pipe supports

6.            Clamps(Fixed & free)

7.            U type jacks

 

4.2      Equipment and machinery

1.         JCB

2.         Shovel

3.         Pick axe

4.         Submersible Pump

 

5.0  RESOURCES AND ORGANIZATION CHART

6.0  SHORING PROCESS

 

A.      Excavation

 

JCB is used to excavate earth and Laborers can get the excavated area shaped as specified, using shovels and pick axe.

 

B.       Dewatering

 

Ground water can flow into the excavation area and collected water is pumped out using submersible pump.

 

C.      Shoring procedure

This is to be done manually with a simple boring tool which is kept on the ground. The tool is rotated by two workers as shown in the figures and the soil is taken out from the pit by using the same tool. Once it is reaches to the water table, a 250mm Φ PVC Pipe is inserted to the pit as a temporary casing and boring is continued up to a depth of 6m from the ground level and the ‘H’ girder will be placed using backhoe. The bottom area of H iron will be concreted (if necessary) and then PVC pipe will be taken up slowly

 

                          

 

 

 

 

Similar procedure shall be carried out right round the boundary of the shoring with 900mm-1200mm spacing to drive the H irons vertically.

 

Thereafter excavation will be commenced along the H girder line and in parallel to that, 2” thick timber plank or MS plate also inserted manually.

 

 

Lateral supports (1^st and 2^nd bracing) will be provide by using the I beam as shown in the attached drawing in the annex.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2

7.0  QUALITY CONTROL AND INSPECTION

For the purpose of quality controlling, the inspection and testing procedures will be used at the site to keep the records and to maintain the quality of the construction work at site. In which all the criteria’s will be addressed and checked, so that the construction work will have the same quality throughout the project.

Once the Contractors’ Engineer and the QA/QC Engineer carried out the inspection, Consultant’s representative will carry out his inspection along with the Contractors’ QA/QC Engineer and make the final approval to precede the work.

Frequent inspection and monitoring will also be done to execute a safe work.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.0 SAFETY PLAN

·         All the dangerous areas must be barricaded

·         Safe flat forms for working at higher levels shall be provided.

·         Safety Guard rails shall be provided at the perimeter run.

·         All the electrical wires and sockets such a way that must be covered to safety regulation

·         Water pumps must be ready at any time for immediate use.

·         First aid facilities and vehicles for emergency cases shall be available at site