Skema konstruksi pasokan air terkubur pipa PE kota: koneksi lelehan panas dan respons pemukiman

2025-08-18

Pipa

PE banyak digunakan dalam pasokan air terkubur kota karena ketahanan korosi dan fleksibilitas yang kuat. Selama konstruksi, perlu untuk fokus pada pengendalian kualitas sambungan lelehan panas dan langkah-langkah penyelesaian untuk memastikan operasi jangka panjang yang stabil dari sistem pasokan air.

sambungan lelehan panas adalah proses koneksi inti dari pipa PE, dan perlu untuk secara ketat mengikuti spesifikasi operasi. Sebelum konstruksi, penampilan pipa harus diperiksa untuk memastikan bahwa tidak ada goresan, depresi, dan port datar. Saat menggunakan tukang las lelehan panas khusus, suhu pemanasan (biasanya 19010 ° C) dan waktu pemanasan harus diatur sesuai dengan spesifikasi diameter pipa. Setelah pelat pemanas menunjukkan keadaan cair yang seragam, dengan cepat hubungkan pipa dan pertahankan tekanan yang ditentukan sampai antarmuka mendingin dan mengeras. Setelah sambungan selesai, perlu untuk memeriksa apakah antarmuka telah membentuk flensa seragam, tidak ada pengelasan virtual, fenomena pengelasan kebocoran, dan melakukan uji tekanan jika perlu. Tekanan uji tidak kurang dari 1,5 kali tekanan kerja, dan tekanan yang menahan selama 30 menit tanpa penurunan tekanan memenuhi syarat.

Untuk masalah penyelesaian pondasi umum dalam konstruksi kota, tindakan pencegahan dan pengendalian perlu diambil dari beberapa tautan desain dan konstruksi. Sebelum peletakan pipa, survei geologi harus dilakukan, dan lapisan tanah lunak harus diperlakukan dengan penggantian pasir dan kerikil bertingkat, dan tingkat pemadatan harus berlapis hingga 90%. Pondasi pipa harus terbuat dari bantalan pasir setebal 150mm, dan dermaga pendukung beton harus ditambahkan di antarmuka untuk penguatan. Saat mengisi ulang, tanah biasa atau pasir dengan ukuran partikel 50mm harus dipilih, dan tinggi lapisan belakang tidak boleh melebihi 300mm. Roller ringan harus digunakan untuk pemadatan untuk menghindari penggulungan mekanis langsung dari pipa. Untuk bagian jalan penyeberangan atau area yang kompleks secara geologis, "jembatan pipa" dapat diletakkan atau kompensator bellow dapat diatur untuk mengimbangi tegangan penyelesaian dengan menggunakan fleksibilitas pipa PE itu sendiri.

proses konstruksi juga perlu memperhatikan penyesuaian adaptasi lingkungan. Selama konstruksi musim dingin, pipa harus dipanaskan hingga lebih dari 5 ° C sebelum sambungan lelehan panas untuk menghindari retak rapuh suhu rendah; selama suhu tinggi di musim panas, tindakan naungan harus diambil untuk mencegah pipa dari ekspansi dan deformasi termal. Pada saat yang sama, buat catatan konstruksi, termasuk parameter lelehan panas, data perawatan pondasi, hasil pengamatan penyelesaian, dll., untuk membentuk file teknis lengkap untuk memberikan dasar untuk operasi dan pemeliharaan selanjutnya. Melalui aplikasi ilmiah teknologi koneksi lelehan panas dan teknologi pencegahan dan pengendalian penyelesaian, keamanan dan daya tahan sistem pasokan air pipa PE dapat ditingkatkan secara efektif untuk memenuhi kebutuhan operasi jangka panjang teknik kota.

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